31-5000949 Rev. 0 08-25
READ CAREFULLY.
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Service
Manual
GE is a trademark of the General Electric Company. Manufactured under trademark license.
Contact GE Appliances at:
+RPHRZQHUGEAppliances.com
+9$&3URGEAppliancesairandwater.com
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866.814.3633
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31-5000949 Rev. 0
General Information
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CAUTION
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MODEL NUMBER GUIDE
MAJOR / MINOR REVISION
REFRIGERANT
5%
VOLTAGE
$3++=
DESIGN VARIANT
09$5,$%/(63(('02'8/$7,1*
BRAND
1*(
PRODUCT
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SEER2
APPLICATION
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COOLING CAPACITY
(1000BTU/HR)
N S A – XX
XX
21
21
H 36
36
M 5
General Information
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31-5000949 Rev. 0
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ELECTRICAL DATA
NS21H24MA5 NS21H36MA5 NS21H48MA5 NS21H60MA5
Line voltage data - 60 Hz 9SK 9SK 9SK 9SK
2
Maximum Overcurrent Protection (MOCP) amps 20 30 45 50
3
Minimum Circuit Ampacity (MCA) 15.0 20.1 26.9 32.5
Compressor Input (amps) 9.9 14.0 19.5 24.0
Outdoor Fan Motor - Full Load Amps 2.6 2.6 2.6 2.6
CONTROLS
4
Discharge Air Temperature Sensor 88K38 • • • •
OPTIONAL ACCESSORIES - ORDER SEPARATELY
Freezestat LQWXELQJ * • • • •
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• • • •
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• • • •
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General Data Model No. NS21H24MA5 NS21H36MA5 NS21H48MA5 NS21H60MA5
1RPLQDO7RQQDJH 2345
Connections (Sweat)
/LTXLGOLQHRGLQ
9DSRUOLQHRGLQ
Refrigerant (15 ft. Line Set)
1
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Refrigerant (30 ft. Line Set)
ï5%FKDUJHIXUQLVKHG OEVR]NJ OEVR]NJ OEVR]NJ OEVR]NJ
Outdoor Coil 1HWIDFHDUHDVTIW
2XWHUFRLO 30.50 30.50 26.10 30.50
,QQHUFRLO - - 25.40 29.60
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1RRIURZV 1 1 2 2
)LQVSHULQFK 22 22 22 22
Outdoor Fan
'LDPHWHULQ 28 28 28 28
1RRIEODGHV 2 2 2 2
0RWRUKS
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0LQ6SHHG 1216 1310 2532 2594
5300D[6SHHG 855 855 945 945
0LQ6SHHG 206 221 415 425
:DWWV0D[6SHHG 236 236 282 282
0LQ6SHHG 10 10 40 41
Shipping Data OEVSDFNDJH 263 263 282 317
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31-5000949 Rev. 0
Service Information
UNIT DIMENSIONS - Inches (mm)
UNIT DIMENSIONS: NS21H -024, -036, -060
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Service Information
UNIT DIMENSIONS - Inches (mm)
UNIT DIMENSIONS: NS21H -048
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Figure 1. Control Panel Components
Service Information
TYPICAL UNIT PARTS ARRANGEMENT
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31-5000949 Rev. 0
Figure 2. Component Locations – NS21H24, 36, 60
Figure 3. Component Locations - NS21H48
Service Information
TYPICAL UNIT PARTS ARRANGEMENT (Cont.)
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31-5000949 Rev. 0
Service Information
OPERATING GAUGE SET AND SERVICE VALVES
Torque Requirements
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Table 1. Torque Requirements
Using Manifold Gauge Set
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Operating Service Valves
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Parts Recommended Torque
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Service Information
SERVICE VALVES - ANGLE AND BALL
(VALVE STEM SHOWN CLOSED)
INSERT HEX WRENCH HERE
SERVICE PORT CORE
SERVICE PORT CAP
ANGLE-TYPE SERVICE VALVE
(FRONT-SEATED CLOSED)
STEM CAP
(VALVE STEM SHOWN OPEN)
INSERT HEX WRENCH HERE
ANGLE-TYPE SERVICE VALVE
(BACK-SEATED OPENED)
1 - Remove stem cap with an appropriately sized wrench.
2 - Use a service wrench with a hex-head extension (3/16" for liquid
line valve sizes and 5/16" for vapor line valve sizes) to back the
stem out counterclockwise as far as it will go.
When service valve is CLOSED, the service port is
open to the line set and indoor unit.
When service valve is OPEN, the service port is
open to line set, indoor and outdoor unit.
OPERATING ANGLE-TYPE SERVICE VALVE
BALL (SHOWN
CLOSED)
SERVICE PORT
CORE
TO OPEN, ROTATE STEM
COUNTERCLOCKWISE 90°.
TO CLOSE, ROTATE STEM
CLOCKWISE 90°.
SERVICE PORT
SERVICE PORT
CAP
STEM CAP
VALVE
STEM
1 - Remove stem cap with an appropriately sized wrench.
2 - Use an appropriately sized wrench to open. To open valve, rotate
stem counterclockwise 90°. To close, rotate stem clockwise 90°.
OPERATING BALL-TYPE SERVICE VALVE
1
2
3
4
5
6
7
8
9
10
11
12
1/12 TURN
A service port cap protects the service port core from contamination
and serves as the primary leak seal.
1 - Remove service port cap with an appropriately sized wrench.
2 - Connect gauge set to service port.
3 - When testing is completed, replace service port cap and tighten
as follows:
With torque wrench, finger tighten and torque
cap per table 2.
Without torque wrench, finger tighten and
use an appropriately sized wrench to turn
an additional 1/6 turn clockwise.
1
2
3
4
5
6
7
8
9
10
11
12
1/6 TURN
Reinstall Stem Cap
Stem cap protects the valve stem from damage and serves as the
primary seal. Replace the stem cap and tighten as follows:
With torque wrench, finger tighten and
then torque cap per table 2.
Without torque wrench, fi
en and use an appropriately sized
wrench to turn an additional 1/12
turn clockwise.
ACCESS SERVICE PORT
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Figure 4. Angle and Ball Service Valves
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Installation
UNIT PLACEMENT
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Positioning Considerations
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Placing Unit On Slab
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Elevating The Unit
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ONE BRACKET PER SIDE (MIN.); FOR EXTRA STABILITY, TWO
BRACKETS PER SIDE, 2” (50.8MM) FROM EACH CORNER.
CONCRETE SLAB — USE TWO PLASTIC
ANCHORS (HOLE DRILL 1/4”)
COIL
BASE PAN
CORNER POST
STABILIZING BRACKET (18 GAUGE
METAL — 2” WIDTH; HEIGHT AS
REQUIRED)
Slab Side Mounting
#10 1/2” LONG SELF-DRILLING
SHEET METAL SCREWS
#10 1-1/4” LONG HEX HD SCREW
AND FLAT WASHER
MINIMUM ONE
PER SIDE
STABILIZING BRACKET (18 GAUGE METAL
— 2” (50.8MM) WIDTH; HEIGHT AS
REQUIRED); BEND TO FORM RIGHT ANGLE
FOR EXTRA
STABILITY
Deck Top Mounting
Underside of Unit Showing
Optional Corner Post Raisers
Stabilizing Unit on Uneven Surfaces
WOOD OR PLASTIC SLAB — NO PLASTIC ANCHOR
(HOLE DRILL 1/8”)
INSTALL UNIT LEVEL OR, IF ON A SLOPE, MAINTAIN SLOPE TOLERANCE
OF 2 DEGREES (OR 2 INCHES PER 5 FEET [50 MM PER 1.5 M]) AWAY
FROM BUILDING STRUCTURE.
MOUNTING
SLAB
BUILDING
STRUCTURE
GROUND LEVEL
Outside Unit Placement
Slab Mounting at Ground Level
SAME FASTENERS AS
SLAB SIDE MOUNTING.
IMPORTANT —
place.
DETAIL A
DETAIL B
DETAIL C
DETAIL D
TWO 90° ELBOWS INSTALLED IN LINE SET
WILL REDUCE LINE SET VIBRATION.
INSTALL UNIT AWAY FROM WINDOWS
Installation
UNIT PLACEMENT (Cont.)
Figure 5. Placement and Slab Mounting
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31-5000949 Rev. 0
Installation
SETTING THE UNIT
Clearances
NOTES -
Service clearance of 30 in. (762 mm) must be maintained on one of
the sides adjacent to the control box.
Clearance to one of the other three sides must be 36 in. (914 mm).
Clearance to one of the remaining two sides may be 12 in. (305
mm) and the final side may be 6 in. (152 mm).
A clearance of 24 in. (610 mm) must be maintained between two units.
48 in. (1219 mm) clearance required on top of unit.
See
NOTES
See NOTES
See NOTES
See
NOTES
CONTROL
BOX
NOTICE: Specific applications may require adjustment of the listed installation clearances to provide protection for
the unit from physical damage or to avoid conditions which limit operating efficiency. (Example: Clearances may
have to be increased to prevent snow or ice from falling on the top of the unit. Additional clearances may also be
required to prevent air recirculation when the unit is installed under a deck or in another tight space.)
Figure 6. Installation Clearances
Stabilizing Unit on Uneven Surfaces
IMPORTANT
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Roof Mounting
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ANCHORED HEAVY NYLON
REFRIGERANT LINE SET — TRANSITION
FROM VERTICAL TO HORIZONTAL
Line Set Isolation — The following illustrations are
examples of proper refrigerant line set isolation:
REFRIGERANT LINE SET — INSTALLING
VERTICAL RUNS (NEW CONSTRUCTION SHOWN)
INSTALLATION
LINE SET
NOTE — Insulate liquid line when it is routed through areas where the
surrounding ambient temperature could become higher than the
temperature of the liquid line or when pressure drop is equal to or greater
than 20 psig.
IMPORTANT — Refrigerant lines must not contact structure.
IMPORTANT Rfi tli t t t t ll
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WARNING
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CAUTION
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31-5000949 Rev. 0
Stabilizing Unit on Uneven Surfaces (Cont.)
WARNING
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XWLOL]LQJYDULDEOHVSHHGFRPSUHVVRUWHFKQRORJ\:LWKWKH
YDULDEOHVSHHGFRPSUHVVRUDQGYDULDEOHSXPSLQJFDSDFLW\
DGGLWLRQDOFRQVLGHUDWLRQPXVWEHJLYHQWRUHIULJHUDQWSLSLQJ
VL]LQJDQGDSSOLFDWLRQ7KHJXLGHOLQHVEHORZDUHWREHXVHG
H[FOXVLYHO\IRUWKH16+0V\VWHPV
REFRIGERANT LINE SET – INCHES (MM)
Model
Valve Field
Connections
Recommended
Line Set
Liquid Line Vapor Line Liquid Line Vapor Line
-024
LQ
PP
LQ
PP
LQ
PP
LQ
PP
-036
LQ
PP
LQ
PP
LQ
PP
LQ
PP
-048
-060
LQ
PP
LQ
PP
LQ
PP
LQ
PP
NOTE -6RPHDSSOLFDWLRQVPD\UHTXLUHD¿HOGSURYLGHG´WR
´DGDSWHU
3DJH
31-5000949 Rev. 0
Installation
NEW OR REPLAEMENT LINE SET (Cont.)
COOLING SYSTEM (R454B)
7RWDOHTXLYDOHQWOHQJWKHTXDOVIHHWSLSLQJDQGDOO
¿WWLQJVLQFOXGHG
NOTE –/HQJWKLVJHQHUDOJXLGH/HQJWKVPD\EHPRUHRU
OHVVGHSHQGLQJRQUHPDLQLQJV\VWHPGHVLJQIDFWRUV
0D[LPXPOLQHDUDFWXDOOHQJWK IHHW
0D[LPXPOLQHDUOLTXLGOLIW IHHW
NOTE –0D[LPXPOLIWVDUHGHSHQGHQWRQWRWDOOHQJWK
QXPEHURIHOERZVHWFWKDWFRQWULEXWHWRWRWDOSUHVVXUH
GURS
0D[LPXPOHQJWKYDSRUULVHU IHHW
•
8SWR/LQHDU)HHW8VHUDWHGOLQHVL]HVOLVWHGLQTable 3
%HWZHHQDQG/LQHDU)HHW&UDQNFDVHKHDWHU
DQGQRQEOHHGSRUW7;9IDFWRU\LQVWDOOHG1RDGGLWLRQDO
FRPSRQHQWVUHTXLUHG9HUWLFDOYDSRUULVHUPXVWEHVL]HG
WRWKHYDSRUULVHUOLVWHGLQWKHTable 4RQV\VWHPVZLWKOLQH
VHWVORQJHUWKDQIHHW8VHTable 5WRGHWHUPLQHWKH
FRUUHFWOLTXLGDQGYDSRUOLQHVL]HV2YHU/LQHDU)HHW
QRWUHFRPPHQGHG
$GGLWLRQDORLOLVQRWUHTXLUHGIRUV\VWHPVZLWKOLQHOHQJWKV
XSWRIHHW
SUCTION TRAPS
)RUV\VWHPVZLWKWKHRXWGRRUXQLWIHHWDERYHWKH
LQGRRUXQLWRQHWUDSPXVWEHLQVWDOOHGDWWKHERWWRPRIWKH
VXFWLRQULVHU
Table 3. Standard Refrigerant Line Set – Up to 50 Linear Feet in Length
Table 4. NS21H**M Line Set Guidelines – 51 to 150 Linear Feet in Length
Table 5. Liquid Line Diameter Selection Table
Inches (mm)
Valve Size Connections Recommended Line Sets
NS21H**M* Liquid Line Suction Line L15 Line Set Model Line Set Length Catalog Number
-024 ´PP ´PP L15-41-20 IHHWP -
-036
-048
´PP ´PP
L15-65-30 IHHWP -
L15-65-40 IHHWP -
L15-65-50 IHHWP -
-060 ´PP ´PP )LHOGIDEULFDWHG
$SSOLFDEOHWRDOOPLQRUUHYLVLRQQXPEHUVXQOHVVRWKHUZLVHVSHFL¿HG
6RPHDSSOLFDWLRQVPD\UHTXLUHD¿HOGSURYLGHG´WR´DGDSWHU
Model
Maximum Total
Equivalent Length
(ft)
Maximum Linear
(actual) Length (ft)
Maximum Vapor
Riser (ft)
Maximum
Linear Liquid
Lift (ft)
Preferred Vapor
Line Sizes for
Horizontal Runs
Required
Vapor Riser
Size
-024 180 150 60 60 ´ ´
-036 180 150 60 60 ´ ´
-048 180 150 60 60 ´ ´
-060 180 150 60 60 ´ ´
Unit Line Size
Total Linear Length (feet)
25 50 75 100 125 150
-024
´ 25 50 55 48 40 33
´ 25 50 60 60 60 60
-036
´ 25 50 60 56 51 45
´ 25 50 60 60 60 60
-048
´ 25 50 50 41 31 22
´ 25 50 60 60 60 60
-060
´ 25 50 36 22 8 NR
´ 25 50 60 60 60 5
Max. Elevation (ft)
NOTE - 6KDGHGURZVLQGLFDWHUDWHGOLTXLGOLQHVL]H
$)LQG\RXUXQLWRQWKHOHIWVLGHRIWKHWDEOH
%6WDUWZLWKWKHUDWHGOLTXLGOLQHVL]HVKDGHGURZRQWKHRXWGRRUXQLW
&6HOHFWWKH DFWXDO7RWDO/LQHDU/HQJWKRI \RXUV\VWHPVKRZQDWWKH WRS
RIWKHWDEOH
'7KHHOHYDWLRQ OLVWHG LQWKHWDEOHLVWKHPD[LPXP DOORZHG IRU WKH OLTXLG
OLQHOLVWHG
(6HOHFW RU FRQVLGHU WKH ODUJHU OLTXLG OLQH VL]H VKRZQ LQ WKH WDEOH LI WKH
HOHYDWLRQGRHVQRWPHHW\RXUUHTXLUHPHQWV
3DJH
31-5000949 Rev. 0
Installation
ANCHORED HEAVY NYLON
WIRE TIE OR AUTOMOTIVE
MUFFLER‐TYPE HANGER
STRAP LIQUID LINE TO
VAPOR LINE
WALL
STUD
LIQUID LINE
NON-CORROSIVE
METAL SLEEVE
VAPOR LINE - WRAPPED
IN ARMAFLEX
AUTOMOTIVE
MUFFLER‐TYPE HANGER
REFRIGERANT LINE SET — TRANSITION
FROM VERTICAL TO HORIZONTAL
Line Set Isolation — The following illustrations are
examples of proper refrigerant line set isolation:
STRAPPING
MATERIAL (AROUND
VAPOR LINE ONLY)
TAPE OR
WIRE TIE
WIRE TIE (AROUND
VAPOR LINE ONLY)
FLOOR JOIST OR
ROOF RAFTER
TAPE OR
WIRE TIE
To hang line set from joist or rafter, use either metal strapping material
or anchored heavy nylon wire ties.
8 FEET (2.43 METERS)
STRAP THE VAPOR LINE TO THE JOIST
OR RAFTER AT 8 FEET (2.43 METERS)
INTERVALS THEN STRAP THE LIQUID
LINE TO THE VAPOR LINE.
FLOOR JOIST OR
ROOF RAFTER
REFRIGERANT LINE SET — INSTALLING
HORIZONTAL RUNS
NOTE — Similar installation practices should be used if line set is
to be installed on exterior of outside wall.
PVC
PIPE
FIBERGLASS
INSULATION
CAULK
OUTSIDE
WALL
VAPOR LINE WRAPPED
WITH ARMAFLEX
LIQUID
LINE
OUTSIDE WALL
LIQUID LINE
VAPOR LINE
WOOD BLOCK
BETWEEN STUDS
STRAP
WOOD BLOCK
STRAP
SLEEVE
WIRE TIE
WIRE TIE
WIRE TIE
INSIDE WALL
REFRIGERANT LINE SET — INSTALLING
VERTICAL RUNS (NEW CONSTRUCTION SHOWN)
INSTALLATION
LINE SET
NOTE — Insulate liquid line when it is routed through areas where the
surrounding ambient temperature could become higher than the
temperature of the liquid line or when pressure drop is equal to or greater
than 20 psig.
NON-CORROSIVE
METAL SLEEVE
IMPORTANT — Refrigerant lines must not contact structure.
NON-CORROSIVE
METAL SLEEVE
8 FEET (2.43 METERS)
IMPORTANT — Refrigerant lines must not contact wall
WARNING — Polyol ester (POE) oils used with HFC-410A
refrigerant absorb moisture very quickly. It is very important that the
refrigerant system be kept closed as much as possible. DO NOT
remove line set caps or service valve stub caps until you are ready
to make connections.
Figure 7. Line Set Installation
3DJH
31-5000949 Rev. 0
Installation
BRAZING CONNECTIONS
8VHWKHSURFHGXUHVRXWOLQHGLQFigure 8DQGFigure 9IRU
EUD]LQJOLQHVHWFRQQHFWLRQVWRVHUYLFHYDOYHV
WARNING
'DQJHURI¿UH%OHHGLQJWKHUHIULJHUDQW
FKDUJHIURPRQO\WKHKLJKVLGHPD\UHVXOWLQSUHVVXUL]DWLRQ
RIWKHORZVLGHVKHOODQGVXFWLRQWXELQJ$SSOLFDWLRQRID
EUD]LQJWRUFKWRDSUHVVXUL]HGV\VWHPPD\UHVXOWLQLJQLWLRQ
RIWKHUHIULJHUDQWDQGRLOPL[WXUH&KHFNWKHKLJKDQGORZ
SUHVVXUHVEHIRUHDSSO\LQJKHDW
WARNING
:KHQXVLQJDKLJKSUHVVXUHJDVVXFK
DVQLWURJHQWRSUHVVXUL]HDUHIULJHUDWLRQRUDLUFRQGLWLRQLQJ
V\VWHPXVHDUHJXODWRUWKDWFDQFRQWUROWKHSUHVVXUHGRZQ
WRRUSVLJWRN3D
CAUTION
%UD]LQJDOOR\VDQGÀX[FRQWDLQPDWHULDOV
ZKLFKDUHKD]DUGRXVWR\RXUKHDOWK
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3HUIRUPRSHUDWLRQVRQO\LQZHOOYHQWLODWHGDUHDV
:HDUJORYHVDQGSURWHFWLYHJRJJOHVRUIDFHVKLHOGWR
SURWHFWDJDLQVWEXUQV
:DVKKDQGVZLWKVRDSDQGZDWHUDIWHUKDQGOLQJEUD]LQJ
DOOR\VDQGÀX[
IMPORTANT
$OORZEUD]HMRLQWWRFRROEHIRUH
UHPRYLQJWKHZHWUDJIURPWKHVHUYLFHYDOYH7HPSHUDWXUHV
DERYH)FDQGDPDJHYDOYHVHDOV
IMPORTANT
8VHVLOYHUDOOR\EUD]LQJURGVZLWK
PLQLPXPVLOYHUDOOR\IRUFRSSHUWRFRSSHUEUD]LQJ8VH
PLQLPXPDOOR\IRUFRSSHUWREUDVVDQGFRSSHUWRVWHHO
EUD]LQJ
IMPORTANT
Fire, Explosion and Personal Safety
hazard.)DLOXUHWRIROORZWKLVZDUQLQJFRXOGUHVXOWLQ
GDPDJHSHUVRQDOLQMXU\RUGHDWK
1HYHUXVHR[\JHQWRSUHVVXUL]HRUSXUJHUHIULJHUDWLRQOLQHV
2[\JHQZKHQH[SRVHGWRDVSDUNRURSHQÀDPHFDQ
FDXVH¿UHDQGRUDQH[SORVLRQWKDWFRXOGUHVXOWLQSURSHUW\
GDPDJHSHUVRQDOLQMXU\RUGHDWK
3DJH
31-5000949 Rev. 0
Installation
BRAZING CONNECTIONS (Cont.)
ATTACH THE MANIFOLD GAUGE SET FOR BRAZING LIQUID AND VAPOR LINE SERVICE VALVES
OUTDOOR
UNIT
LIQUID LINE
VAPOR LINE
LIQUID LINE SERVICE
VALVE
VAPOR LINE
SERVICE
VALVE
ATTACH
GAUGES
INDOOR
UNIT
VAPOR SERVICE PORT MUST BE OPEN
TO ALLOW EXIT POINT FOR NITROGEN
A - Connect gauge set low pressure side to
liquid line service valve (service port).
B - Connect gauge set center port to bottle of
nitrogen with regulator.
C - Remove core from valve in vapor line
service port to allow nitrogen to escape.
NITROGEN
HIGHLOW
USE REGULATOR TO FLOW
NITROGEN AT 1 TO 2 PSIG.
B
A
C
WHEN BRAZING LINE SET TO
SERVICE VALVES, POINT FLAME
AWAY FROM SERVICE VALVE.
Flow regulated nitrogen (at 1 to 2 psig) through the low-side refrigeration gauge set into the liquid line service port valve, and out of the
vapor line service port valve.
CUT AND DEBUR
CAP AND CORE REMOVAL
Cut ends of the refrigerant lines square (free from nicks or dents)
and debur the ends. The pipe must remain round. Do not crimp end
of the line.
Remove service cap and core from
both the vapor and liquid line service
ports.
1
2
LIQUID LINE SERVICE
VALVE
SERVICE
PORT
CORE
SERVICE PORT
CAP
SERVICE
PORT
CORE
SERVICE
PORT CAP
CUT AND DEBUR
LINE SET SIZE MATCHES
SERVICE VALVE CONNECTION
DO NOT CRIMP SERVICE VALVE
CONNECTOR WHEN PIPE IS
SMALLER THAN CONNECTION
3
VAPOR LINE SERVICE
VALVE
COPPER TUBE
STUB
REFRIGERANT LINE
REDUCER
SERVICE VALVE
CONNECTION
LINE SET SIZE IS SMALLER
THAN CONNECTION
Figure 8. Brazing Procedures
3DJH
31-5000949 Rev. 0
Installation
BRAZING CONNECTIONS (Cont.)
WHEN BRAZING LINE SET TO
SERVICE VALVES, POINT FLAME
AWAY FROM SERVICE VALVE.
LIQUID LINE SERVICE VALVE
LIQUID LINE
BRAZE LINE SET
Wrap both service valves with water-saturated cloths as illustrated here and as mentioned in step 4, before brazing to line set.
Cloths must remain water-saturated throughout the brazing and cool-down process.
WATER-SATURATED
CLOTH
IMPORTANT — Allow braze joint to cool. Apply
additional water-saturated cloths to help cool brazed
joint. Do not remove water-saturated cloths until
piping has cooled. Temperatures above 250ºF will
damage valve seals.
6
VAPOR LINE
WATER-SATURATED
CLOTH
VAPOR LINE
SERVICE VALVE
After all connections have been brazed, disconnect manifold gauge set from service ports. Apply additional water-saturated cloths to both
services valves to cool piping. Once piping is cool, remove all water-saturated cloths.
WHEN BRAZING LINE SET TO
SERVICE VALVES, POINT FLAME
AWAY FROM SERVICE VALVE.
PREPARATION FOR NEXT STEP
7
WRAP SERVICE VALVES
To help protect service valve seals during brazing, wrap water-saturated cloths around service valve bodies and copper tube stubs. Use
additional water-saturated cloths underneath the valve body to protect the base paint.
4
FLOW NITROGEN
Flow regulated nitrogen (at 1 to 2 psig) through the refrigeration gauge set into the valve stem port connection on the liquid service valve and
out of the vapor valve stem port. See steps 3A, 3B and 3C on manifold gauge set connections.
5
WARNING
FIRE, PERSONAL INJURY, OR PROPERTY DAMAGE
may result if you do not wrap a water-saturated cloth around
both liquid and suction line service valve bodies and copper
tube stub while brazing the line set! The braze, when
complete, must be quenched with water to absorb any
residual heat.
Do not open service valves until refrigerant lines and
indoor coil have been leak-tested and evacuated. Refer
to Leak Test and Evacuation section of this manual.
WARNING
While protecting the
service valve seals with
water-saturated cloths,
ensure that water does
NOT enter the system.
Figure 9. Brazing Procedures (Cont’d)
3DJH
31-5000949 Rev. 0
1A 7\SLFDO([LVWLQJ)L[HG2UL¿FH5HPRYDO
Procedure (Uncased Coil Shown)
A.2Q IXOO\ FDVHG FRLOV UHPRYH WKH FRLO DFFHVV DQG SOXPELQJ
SDQHOV
B.5HPRYHDQ\VKLSSLQJFODPSVIURPWKHOLTXLGOLQHDQGGLVWULEXWRU
DVVHPEO\
C.8VLQJWZRZUHQFKHVRQHWRKROGWKHRUL¿FHKRXVLQJDQGRQH
WRUHPRYHWKHEUDVVQXWGLVFRQQHFWOLTXLGOLQHIURPOLTXLGOLQH
RUL¿FHKRXVLQJ7DNH FDUH QRW WR WZLVWRU GDPDJHGLVWULEXWRU
WXEHVGXULQJWKLVSURFHVV
D.5HPRYH DQG GLVFDUG ¿[HG RUL¿FH YDOYH VWHP DVVHPEO\ LI
SUHVHQWDQG7HÀRQ
®
ZDVKHUDVVKRZQDERYH
E.8VHD¿HOGSURYLGHG¿WWLQJWRWHPSRUDULO\UHFRQQHFWWKHOLTXLG
OLQHWRWKHLQGRRUXQLW¶VOLTXLGOLQHRUL¿FHKRXVLQJ
2 Connect Gauges and Equipment for Flushing
Procedure
A.,QYHUWHG5%F\OLQGHUZLWKFOHDQUHIULJHUDQWWRWKHYDSRU
VHUYLFHYDOYH
% 5%JDXJHVHWORZVLGHWRWKHOLTXLGOLQHYDOYH
& 5%JDXJHVHWFHQWHUSRUWWRLQOHWRQWKHUHFRYHU\PDFKLQH
ZLWKDQHPSW\UHFRYHU\WDQNWRWKHJDXJHVHW
'&RQQHFW UHFRYHU\ WDQN WR UHFRYHU\ PDFKLQHV SHU PDFKLQH
LQVWUXFWLRQV
1B Typical Existing Expansion Valve Removal
Procedure (Uncased Coil Shown)
A.2Q IXOO\ FDVHG FRLOV UHPRYH WKH FRLO DFFHVV DQG SOXPELQJ
SDQHOV
B.5HPRYHDQ\VKLSSLQJFODPSVIURPWKHOLTXLGOLQHDQGGLVWULEXWRU
DVVHPEO\
C.'LVFRQQHFWWKHHTXDOL]HUOLQHIURPWKH¿WWLQJRQWKHYDSRUOLQH
D.5HPRYHWKHYDSRUOLQHVHQVLQJEXOE
E.'LVFRQQHFW WKH OLTXLG OLQH IURP WKH H[SDQVLRQ YDOYH DW WKH
OLTXLGOLQHDVVHPEO\
F.'LVFRQQHFW WKH H[SDQVLRQ YDOYH IURP WKH OLTXLG OLQH RUL¿FH
KRXVLQJ 7DNH FDUH QRW WR WZLVW RU GDPDJH GLVWULEXWRU WXEHV
GXULQJWKLVSURFHVV
G.5HPRYH DQG GLVFDUG H[SDQVLRQ YDOYH DQG WKH WZR 7HÀRQ
®
ULQJV
H.8VHD¿HOGSURYLGHG¿WWLQJWRWHPSRUDULO\UHFRQQHFWWKHOLTXLG
OLQHWRWKHLQGRRUXQLW¶VOLTXLGOLQHRUL¿FHKRXVLQJ
3 Flushing Line Set
7KH OLQH VHW DQG LQGRRU XQLW FRLO PXVW EH ÀXVKHG ZLWK DW OHDVW
WKH VDPH DPRXQW RI FOHDQ UHIULJHUDQW WKDW SUHYLRXVO\ FKDUJHG
WKH V\VWHP &KHFN WKH FKDUJH LQ WKH ÀXVKLQJ F\OLQGHU EHIRUH
SURFHHGLQJ
A.6HW WKH UHFRYHU\ PDFKLQH IRU OLTXLG UHFRYHU\ DQG VWDUW WKH
UHFRYHU\ PDFKLQH 2SHQ WKH JDXJH VHW YDOYHV WR DOORZ WKH
UHFRYHU\PDFKLQHWRSXOODYDFXXPRQWKHH[LVWLQJV\VWHPOLQH
VHWDQGLQGRRUXQLWFRLO
B.,QYHUWWKHF\OLQGHURIFOHDQ5%DQGRSHQLWVYDOYHWRDOORZ
OLTXLG UHIULJHUDQW WR ÀRZ LQWR WKH V\VWHP WKURXJK WKH YDSRU
OLQHYDOYH$OORZWKHUHIULJHUDQWWRSDVVIURPWKHF\OLQGHUDQG
WKURXJKWKHOLQHVHWDQGWKHLQGRRUXQLWFRLOEHIRUHLWHQWHUVWKH
UHFRYHU\PDFKLQH
C.$IWHU DOO RI WKH OLTXLG UHIULJHUDQW KDV EHHQ UHFRYHUHG VZLWFK
WKH UHFRYHU\ PDFKLQH WR YDSRU UHFRYHU\ VR WKDW DOO RI WKH
5%YDSRULVUHFRYHUHG$OORZWKHUHFRYHU\PDFKLQHWRSXOO
WKHV\VWHPGRZQWR
C.&ORVHWKHYDOYHRQWKHLQYHUWHG5%GUXPDQGWKHJDXJH
VHWYDOYHV3XPSWKHUHPDLQLQJUHIULJHUDQWRXWRIWKHUHFRYHU\
PDFKLQHDQGWXUQWKHPDFKLQHRႇ
Installation
FLUSHING LINE SET AND INDOOR COIL
TEFLON
®
RING
FIXED ORIFICE
BRASS NUT
LIQUID LINE ASSEMBLY
(INCLUDES STRAINER)
LIQUID LINE ORIFICE HOUSING
DISTRIBUTOR TUBES
DISTRIBUTOR
ASSEMBLY
REMOVE AND DISCARD
WHITE TEFLON
®
SEAL
(IF PRESENT)
OR
SENSING
LINE
TWO-PIECE PATCH PLATE
(UNCASED COIL ONLY)
VAPOR
LINE
DISTRIBUTOR
ASSEMBLY
DISTRIBUTOR
TUBES
LIQUID
LINE
MALE EQUALIZER
LINE FITTING
EQUALIZER
LINE
EXPANSION
VALVE
TEFLON
®
RING
STUB END
TEFLON
®
RING
SENSING BULB
LIQUID LINE
ORIFICE
HOUSING
LIQUID LINE
ASSEMBLY WITH
BRASS NUT
LOW HIGH
EXISTING
INDOOR
UNIT
GAUGE
MANIFOLD
CYLINDER CONTAINING
CLEAN R-410A TO BE
USED FOR FLUSHING
(Positioned to deliver liquid
refrigerant)
LIQUID LINE SERVICE
VALVE
INLET
DISCHARGE
TANK
RETURN
CLOSED
OPENED
RECOVERY
CYLINDER
RECOVERY MACHINE
NEW
OUTDOOR
UNIT
VAPOR LINE
SERVICE VALVE
VAPOR
LIQUID
1
1
2
3
4
*IMPORTANT - Clean refrigerant is any refrigerant in a system that has not had compressor burn out. If the system has
experienced burn out, it is recommended that the existing line set and indoor coil be replaced.
Figure 10. Removing Metering Device and Flushing
3DJH
31-5000949 Rev. 0
4 Typical New Check Expansion Valve Installation Procedure
7KLVRXWGRRUXQLWLVGHVLJQHGIRUXVHLQV\VWHPVWKDWXVHDFKHFNH[SDQVLRQYDOYHPHWHULQJGHYLFH6HHWKH8QLW3URGXFW
6SHFL¿FDWLRQVIRUDSSURYHGH[SDQVLRQYDOYHNLWPDWFKXSVDQGDSSOLFDWLRQLQIRUPDWLRQ
Sensing Bulb Installation
A.$WWDFKWKHYDSRUOLQHVHQVLQJEXOELQWKHSURSHURULHQWDWLRQDV
LOOXVWUDWHGWRWKHULJKWXVLQJWKHFODPSDQGVFUHZVSURYLGHG
NOTE: &RQ¿UPSURSHUWKHUPDOFRQWDFWEHWZHHQYDSRUOLQH
DQGFKHFNH[SDQVLRQEXOEEHIRUHLQVXODWLQJWKHVHQVLQJEXOE
RQFHLQVWDOOHG
B.&RQQHFWWKHHTXDOL]HUOLQHIURPWKHH[SDQVLRQYDOYHWRWKH
HTXDOL]HUYDSRUSRUWRQWKHYDSRUOLQH)LQJHUWLJKWHQWKHÀDUH
QXWSOXVWXUQIWOEDVLOOXVWUDWHGEHORZ
Equalizer Line Installation
5HPRYH DQG GLVFDUG HLWKHU WKH ÀDUH VHDO FDS RUÀDUH QXW ZLWK
FRSSHUÀDUHVHDOERQQHWIURPWKHHTXDOL]HUOLQHSRUWRQWKHYDSRU
OLQHDVLOOXVWUDWHGLQWKH¿JXUHWRWKHULJKW
Installation
FLUSHING LINE SET AND INDOOR COIL (Cont.)
VAPOR LINE
FLARE NUT
COPPER FLARE
SEAL BONNET
MALE BRASS EQUALIZER
LINE FITTING
FLARE SEAL CAP
OR
1
2
3
4
5
6
7
8
9
10
11
12
1/8 Turn
1
2
3
4
5
6
7
8
9
10
11
12
1/2 Turn
TWO PIECE
PATCH PLATE
(UNCASED
COIL ONLY)
VAPOR
LINE
LIQUID LINE
ORIFICE
HOUSING
DISTRIBUTOR
TUBES
LIQUID LINE
MALE EQUALIZER LINE
FITTING (SEE
EQUALIZER LINE
INSTALLATION FOR
FURTHER DETAILS)
SENSING
LINE
EQUALIZER
LINE
EXPANSION
VALVE
TEFLON
®
RING
(Uncase d Coil Shown)
Sensing bulb insulation is required if
mounted external to the coil casing. sensing
bulb installation for bulb positioning.
STUB
END
TEFLON
®
RING
LIQUID LINE
ASSEMBLY WITH
BRASS NUT
DISTRIBUTOR
ASSEMBLY
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ON 7/8” AND LARGER LINES,
MOUNT SENSING BULB AT
EITHER THE 4 OR 8 O'CLOCK
POSITION.
12
ON LINES SMALLER THAN
7/8”, MOUNT SENSING
BULB AT EITHER THE 3 OR
9 O'CLOCK POSITION.
12
BULB
VAPOR LINE
VAPOR LINE
NOTE - NEVER MOUNT THE SENSING BULB ON
BOTTOM OF LINE.
BULB
BULB
BULB
3DJH
31-5000949 Rev. 0
Installation
FLUSHING LINE SET AND INDOOR COIL (Cont.)
IMPORTANT
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LEAK TESTING THE SYSTEM
WARNING
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3DJH
31-5000949 Rev. 0
Installation
LEAK TESTING THE SYSTEM (Cont.)
TO VAPOR
SERVICE VALVE
R454B
MANIFOLD GAUGE SET
OUTDOOR UNIT
HIGH
LOW
1
2
A
B
NITROGEN
A - With both manifold valves closed, connect the cylinder of R454B refrigerant to the center port of the
manifold gauge set. Open the valve on the R454B cylinder (vapor only).
B -Open the high pressure side of the manifold to allow R454B into the line set and indoor unit. Weigh in
a trace amount of R454B. [A trace amount is a maximum of two ounces (57 g) refrigerant or three
pounds (31 kPa) pressure.] Close the valve on the R454B cylinder and the valve on the high
pressure side of the manifold gauge set. Disconnect the R454B cylinder.
C -Connect a cylinder of dry nitrogen with a pressure regulating valve to the center port of the manifold gauge
set.
D -Adjust dry nitogen pressure to 150 psig (1034 kPa). Open the valve on the high side of the manifold gauge set
in order to pressurize the line set and the indoor unit.
E - After a few minutes, open one of the service valve ports and verify that the refrigerant added to the
system earlier is measurable with a leak detector.
F -
After the line set has been connected to the indoor and outdoor units, check the line set connections and
indoor unit for leaks. Use the following procedure to test for leaks:
A - Connect an R454B manifold gauge set high pressure hose to the vapor valve service port.
B -With both manifold valves closed, connect the cylinder of R454B refrigerant to the center port of
the manifold gauge set.
NOTE - Later in the procedure, the R454B container will be replaced by the nitrogen container
CONNECT GAUGE SET
TEST FOR LEAKS
After leak testing, disconnect gauges from service ports.
Leak Test - Line Set and Indoor Coil
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SURWHFWVWKHPDQLIROGJDXJHVHWIURPKLJKSUHVVXUHGDPDJH
Figure 11. System Leak Test
3DJH
31-5000949 Rev. 0
Installation
A Open both manifold valves and start the vacuum pump.
B Evacuate the line set and indoor unit to an absolute pressure of 23,000 microns (29.01 inches of mercury).
NOTE — During the early stages of evacuation, it is desirable to close the manifold gauge valve at least once. A rapid rise in pressure
indicates a relatively large leak. If this occurs, repeat the leak testing procedure.
NOTE — The term absolute pressure means the total actual pressure within a given volume or system, above the absolute zero of
pressure. Absolute pressure in a vacuum is equal to atmospheric pressure minus vacuum pressure.
C When the absolute pressure reaches 23,000 microns (29.01 inches of mercury), perform the following:
Close manifold gauge valves
Close valve on vacuum pump
Turn off vacuum pump
Disconnect manifold gauge center port hose from vacuum pump
Attach manifold center port hose to a dry nitrogen cylinder with pressure regulator set to 150 psig (1034 kPa) and purge the hose.
Open manifold gauge valves to break the vacuum in the line set and indoor unit.
Close manifold gauge valves.
D Shut off the dry nitrogen cylinder and remove the manifold gauge hose from the cylinder. Open the manifold gauge valves to release the
dry nitrogen from the line set and indoor unit.
E Reconnect the manifold gauge to the vacuum pump, turn the pump on, and continue to evacuate the line set and indoor unit until the
absolute pressure does not rise above 500 microns (29.9 inches of mercury) within a 20-minute period after shutting off the vacuum pump
and closing the manifold gauge valves.
F When the absolute pressure requirement above has been met, disconnect the manifold hose from the vacuum pump and connect it to an
upright cylinder of R454B refrigerant. Open the manifold gauge valve 1 to 2 psig in order to release the vacuum in the line set and
indoor unit.
G Perform the following:
OUTDOOR
UNIT
TO VAPOR
SERVICE VALVE
TO LIQUID LINE
SERVICE VALVE
MICRON
GAUGE
VACUUM PUMP
A34000 1/4 SAE TEE WITH
SWIVEL COUPLER
500
MANIFOLD
GAUGE SET
R454B
RECOMMEND
MINIMUM 3/8” HOSE
A Connect low side of manifold gauge set
with 1/4 SAE in-line tee to vapor line
service valve
B Connect high side of manifold gauge
set to liquid line service valve
C Connect micron gauge available
connector on the 1/4 SAE in-line tee.
D Connect the vacuum pump (with
vacuum gauge) to the center port of the
manifold gauge set. The center port
line will be used later for both the
R454B and nitrogen containers.
HIGH
LOW
1
2
3
4
5
6
7
8
9
10
11
12
1/6 TURN
NITROGEN
1
CONNECT GAUGE SET
A
B
C
D
2
EVACUATE THE SYSTEM
NOTE — Remove cores from service valves (if not already done).
Close manifold gauge valves.
Shut off R454B cylinder.
Reinstall service valve cores by removing manifold hose from service valve. Quickly install cores with core
tool while maintaining a positive system pressure.
Replace stem caps and secure finger tight, then tighten an additional one-sixth (1/6) of a turn as illustrated.
EVACUATING LINE SET AND INDOOR COIL
Figure 12. Evacuating the System
3DJH
31-5000949 Rev. 0
Installation
EVACUATING LINE SET AND INDOOR
COIL (Cont.)
IMPORTANT
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ELECTRICAL – Circuit Sizing and Wire
Routing
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THERMOSTAT CONTROL AND LOW
VOLTAGE CONTROL WIRING
Thermostat Control Options
Conventional 24VAC Non-Communicating Thermostat
Control
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Low Voltage Control Wiring Connections
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3DJH
31-5000949 Rev. 0
Installation
THERMOSTAT CONTROL AND LOW VOLTAGE CONTROL WIRING (Cont.)
WARNING
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NS21H Thermostat Control Options
Thermostat Type Indoor Unit Type
Qty. of
Wires
Terminal Strip
Connections
Unit Operation
Field Wiring
Diagram
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Size Circuit and Install Service Disconnect
Switch
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WARNING
ELECTROSTATIC DISCHARGE (ESD)
Precautions and Procedures
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Install Thermostat
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3DJH
31-5000949 Rev. 0
Installation
THERMOSTAT CONTROL AND LOW VOLTAGE CONTROL WIRING (Cont.)
3
ROUTE CONTROL WIRES
Maximum length of wiring (18 gauge) for all connections on the RSBus is 1500 feet (457 meters). Wires should be color-coded, with
a temperature rating of 95
º
F(35
º
C) minimum, and solid-core (Class II Rated Wiring). All low voltage wiring must enter unit through
field-provided field-installed grommet installed in electrical inlet.
Any excess high voltage field wiring should be trimmed and secured away from any low voltage field wiring. To facilitate a conduit, a cutout
is located on the bottom of the control box. Connect conduit to the control box using a proper conduit fitting.
ROUTE HIGH VOLTAGE AND GROUND WIRES
4
Communicating Thermostat Wiring
Conventional 24VAC Non-Communicating Thermostat Wiring
Connect the 208/230 high voltage power supply from the disconnect to the contactor as shown. Connect the ground wire from
the power supply to the unit ground lug connection.
WIRE RUN LENGTH
LESS THAN 100’ (30 METERS) 18 TEMPERATURE RATING
35°C MINIMUM16MORE THAN 100’ (30 METERS)
AWG# INSULATION TYPE
Connects to (2)
RAST 6-pin
connectors
Route control wiring
through grommet and
secure with cable tie
Grommet and cable tie
Use watertight conduit
for high voltage
Connect conduit to
cutouot and route high
voltage wiring
Ground Lug
Figure 13. Typical Control Wiring
3DJH
31-5000949 Rev. 0
Installation
THERMOSTAT CONTROL AND LOW VOLTAGE CONTROL WIRING (Cont.)
Figure 14. Conventional 24VAC Heat Pump Non-Communicating Thermostat Wiring
TSTAT
INDOOR
NO COM NC
NO COM NC
ZONING
ALARM
W1
W2
G
R
O/B
DS
C
Y2
Y1
W1
W2
G
R
O/B
DS
C
Y2
Y2
Y1
SW2
LED
2
1
RDSC Field Kit - 24 Volt
Cat # (27A05)
SW1
ON
SENSOR #1
SENSOR #2
W1
W2
C
G
O
R
Y1
OPTIONAL
N.C. CONDENSATE
FLOAT SWITCH
Thermostat
Defrost
Tempering
Kit
Two Stage Gas Furnace/AHU
W1
W2
C
G
O
R
Y1
Y2
DS
DS
3
3
4
5
DS Terminal wiring is optional for De-Humidification Mode, refer to equipment install instructions
3
4
5
DS
Y2
W
Y1
L
O
C
R
I+
I
-
DF
TST
Variable Capacity Non-Communicating Outdoor Unit
1
2
Thermostat/Outdoor Unit Terminal Block (BLACK)
Indoor Unit Terminal Block (BLUE)
See indoor unit install instructions for 2-stage unit configuration
Defrost Tempering Kit 67M41 required when equipped with a gas furnace
TWO STAGE CONNECTIONS
3DJH
31-5000949 Rev. 0
OUTDOOR UNITARY CONTROL - JUMPERS AND TERMINALS
Outdoor Control 7 Segment Display and Push
Button
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Alarms
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Non-Communicating Heat Pump Thermostat
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Installation
RAST TERMINALS FOR
THERMOSTAT WIRING
CONNECTION
CHARGE MODE AND
OPERATION MODE
JUMPER DETAIL
PUSH BUTTON
7 SEGMENT
DISPLAY
OPERATION
MODE
JUMPER
CHARGE
MODE JUMPER
(CHRG MODE)
Figure 15.
3DJH
31-5000949 Rev. 0
OUTDOOR UNITARY CONTROL - JUMPERS AND TERMINALS (Cont.)
Installation
Cooling Operation Mode Jumper
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31-5000949 Rev. 0
OUTDOOR UNITARY CONTROL - JUMPERS AND TERMINALS (Cont.)
Defrost Function
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3DJH
31-5000949 Rev. 0
OUTDOOR UNITARY CONTROL - JUMPERS AND TERMINALS (Cont.)
Installation
DEFROST TEST
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3DJH
31-5000949 Rev. 0
OUTDOOR UNITARY CONTROL - JUMPERS AND TERMINALS (Cont.)
Installation
Table 6. Outdoor Control Terminal Designations and Inputs / Outputs
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31-5000949 Rev. 0
OUTDOOR UNITARY CONTROL - JUMPERS AND TERMINALS (Cont.)
Installation
CHRG Mode
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3DJH
31-5000949 Rev. 0
Piping Assembly
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EEV AND CONTROLLER
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Table 7. LED Status
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3DJH
31-5000949 Rev. 0
EEV AND CONTROLLER (Cont.)
Installation
EEV Valve Coil
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Alarm Code Description
E480
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31-5000949 Rev. 0
EEV AND CONTROLLER (Cont.)
Installation
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Figure 16. EEV Sensor Locations
Figure 17. EEV Piping Assembly
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31-5000949 Rev. 0
EEV AND CONTROLLER (Cont.)
Installation
Figure 18. EEV Control Board Detail
Figure 19. Unitary Control Board Detail
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31-5000949 Rev. 0
EEV AND CONTROLLER (Cont.)
UNIT START-UP
Installation
EEV Transformer
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Table 1.
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Table 8. EEV Coil Detail
3DJH
31-5000949 Rev. 0
7-SEGMENT ALERT AND SYSTEM STATUS CODES
System Operation and Service
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Table 9. Outdoor Control 7-Segment Display Alert Codes and Inverter LED Flash Codes
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Alert
Codes
Inverter
Code
Inverter LED Flash Code
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Priority Alarm Description Possible Causes and Clearing Alarm
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31-5000949 Rev. 0
NOTE – 6\VWHPIDXOWDQGORFNRXWFRGHVWDNHSUHFHGHQFHRYHUV\VWHPVWDWXVFRGHVFRROLQJKHDWLQJRSHUDWLQJSHUFHQWDJHVRUGHIURVWGHKXPLGL¿FDWLRQ
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Alert
Codes
Inverter
Code
Inverter LED Flash Code
QXPEHURIÀDVKHV
Priority Alarm Description Possible Causes and Clearing Alarm
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7-SEGMENT ALERT AND SYSTEM STATUS CODES (Cont.)
System Operation and Service
Table 9. Outdoor Control 7-Segment Display Alert Codes and Inverter LED Flash Codes
3DJH
31-5000949 Rev. 0
7-SEGMENT ALERT AND SYSTEM STATUS CODES (Cont.)
System Operation and Service
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Alert
Codes
Inverter
Code
Inverter LED Flash Code
QXPEHURIÀDVKHV
Priority Alarm Description Possible Causes and Clearing Alarm
Red LED Green LED
E427 21 ÀDVKHV ÀDVK
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Table 9. Outdoor Control 7-Segment Display Alert Codes and Inverter LED Flash Codes
3DJH
31-5000949 Rev. 0
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7-SEGMENT ALERT AND SYSTEM STATUS CODES (Cont.)
System Operation and Service
Table 9. Outdoor Control 7-Segment Display Alert Codes and Inverter LED Flash Codes
3DJH
31-5000949 Rev. 0
7-SEGMENT ALERT AND SYSTEM STATUS CODES (Cont.)
System Operation and Service
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Table 9. Outdoor Control 7-Segment Display Alert Codes and Inverter LED Flash Codes
3DJH
31-5000949 Rev. 0
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6\VWHPVXSHUKHDWKLJKHUWKDQGHJUHHV)IRUPRUHWKDQPLQXWHV+HDWSXPSKHDWLQJ
RSHUDWLRQVWRSSHG
E600 1$ 1$ 1$ 1$
&RPSUHVVRUKDVEHHQF\FOHG2))RQXWLOLW\ORDGVKHGGLQJ9$&SRZHUDSSOLHGWR/DQG&
WHUPLQDOV
E601 1$ 1$ 1$ 1$ 2XWGRRUXQLWKDVEHHQF\FOHG2))RQORZWHPSHUDWXUHSURWHFWLRQ
E600 1$ 1$ 1$
,QIRUPDWLRQ2QO\
'HDOHU
&RPSUHVVRUKDVEHHQ
F\FOHG2))RQXWLOLW\ORDG
VKHGGLQJ
/RDGVKHGGLQJIXQFWLRQ3URYLGHVDPHWKRGIRUDORFDOXWLOLW\
FRPSDQ\WROLPLWWKHPD[LPXPSRZHUOHYHOXVDJHRIWKHRXWGRRU
XQLW7KHIHDWXUHLVDFWLYDWHGE\DSSO\LQJYROWV$&SRZHUWRWKH
/DQG&WHUPLQDOVRQWKHRXWGRRUFRQWURO
E601 1$ 1$ 1$
,QIRUPDWLRQ2QO\
'HDOHU
2XWGRRUXQLWKDVEHHQ
F\FOHG2))RQORZ
WHPSHUDWXUHSURWHFWLRQ
/RZWHPSHUDWXUHSURWHFWLRQ2XWGRRUXQLWZLOOQRWRSHUDWHZKHQ
WKHRXWGRRUWHPSHUDWXUHLVDWRUEHORZ)&,IWKHXQLWLV
RSHUDWLQJDQGWKHRXWGRRUWHPSHUDWXUHGURSVEHORZ)&
WKHXQLWFRQWLQXHVWRRSHUDWHXQWLOWKHURRPWKHUPRVWDWLVVDWLV¿HG
RUWKHRXWGRRUWHPSHUDWXUHGURSVWR)&2XWGRRUXQLW
DPELHQWVHQVRUSURYLGHVWHPSHUDWXUHUHDGLQJV
Table 9. Outdoor Control 7-Segment Display Alert Codes and Inverter LED Flash Codes
7-SEGMENT ALERT AND SYSTEM STATUS CODES (Cont.)
System Operation and Service
3DJH
31-5000949 Rev. 0
Figure 20. Outdoor Control 7-Segment Unit Status Displays
UNIT TYPE: The next item displayed is the self discovery
unit type. AC = air conditioner and HP = heat pump. If the
unit type cannot be determined, three bars appear.
POWER-UP / RESET:
FIRMWARE VERSION: During initial power-up or reset, the
first item displayed is the outdoor control firmware version.
Example to the right shows firmware version 2.3.
7-SEGMENT POWER-UP DISPLAY STRING
OR
OR
UNIT CODE
ery unit code. (may be a single character or two characters).
If the unit code cannot be determined, three bars appear.
THROUGH
OR
(These are just examples of firmware version, unit type,
unit nominal capacity and unit codes.)
UNIT CODE
UNIT TYPE, SIZE AND MODEL
NOT PROGRAMMED
2-TON HEAT PUMP
3-TON HEAT PUMP
4-TON HEAT PUMP
5-TON HEAT PUMP
UNIT NOMINAL CAPACITY: The next item to be displayed
is the self-discovery unit nominal capacity. Valid capacities
are 24 for 2-ton, 36 for 3-ton, 48 for 4-ton and 60 for 5-ton
pear.
OR
7-SEGMENT POWER-UP DISPLAY STRING EXAMPLE
FIRMWARE
VERSION
UNIT
TYPE
UNIT
CAPACITY
UNIT
CODE
.
IDLE MODE
.
.
NS22HM-24
NS22HM-36
NS22HM-48
NS22HM-60
$&
7-SEGMENT ALERT AND SYSTEM STATUS CODES (Cont.)
System Operation and Service
3DJH
31-5000949 Rev. 0
Description Example of Display
Idle Mode'HFLPDOSRLQWÀDVKHVDW+]
Idle Mode'HFLPDOSRLQWÀDVKHVDW+]VHFRQGRQVHFRQGRႇ
'LVSOD\2))
Soft Disable Mode: 7RSDQGERWWRPKRUL]RQWDOOLQHDQGGHFLPDOSRLQWÀDVK
DW+],ILQGRRURURXWGRRUFRQWUROGLVSOD\V6RIW'LVDEOHFRGH
&RQ¿UP SURSHU ZLULQJ EHWZHHQ DOO GHYLFHV WKHUPRVWDW LQGRRU DQG
RXWGRRU
&\FOHSRZHUWRWKHFRQWUROWKDWLVGLVSOD\LQJWKH6RIW'LVDEOHFRGH
3XWWKHURRPWKHUPRVWDWWKURXJK6HWXS
*RWR6HWXS6\VWHP'HYLFHV7KHUPRVWDW(GLWSXVK5HVHW
*RWR6HWXS6\VWHP'HYLFHV7KHUPRVWDW(GLWSXVK5HVHW$OO
,I WKH URRP WKHUPRVWDW GHWHFWV D QHZ GHYLFH RU D GHYLFH WKDW LV QRW
FRPPXQLFDWLQJ LW VHQGV D 6RIW 'LVDEOH :KHQ WKLV RFFXUV$ODUP LV
DFWLYDWHGDQGWKHURRPWKHUPRVWDWVHQGVD6RIW'LVDEOHFRPPDQGWRWKH
RႇHQGLQJGHYLFHRQWKHEXVRXWGRRUFRQWURO,)&$+&(,0RU'DPSHU
&RQWURO0RGXOH
Soft Disable Mode: 7RSDQGERWWRPKRUL]RQWDOOLQHDQGGHFLPDOSRLQWÀDVK
DW+]VHFRQGRQVHFRQGRႇ
7KHFRQWUROLQ6RIW'LVDEOH0RGHLVLQGLFDWHGE\WKHIROORZLQJ
2Q$+& ,)& DQG RXWGRRU FRQWUROV 6RIW 'LVDEOH 0RGH LV LQGLFDWHG E\
ÀDVKLQJGRXEOHKRUL]RQWDOOLQHVRQWKHVHJPHQWGLVSOD\
2Q WKH 'DPSHU &RQWURO 0RGXOH DQG (,0 WKH JUHHQ /(' ZLOO EOLQN
VHFRQGVRQDQGVHFRQGRႇ
O.E.M. Test Mode
$OOVHJPHQWVÀDVKLQJDW+]XQOHVVHUURULVGHWHFWHG127(&RQWURO
VKRXOGEHUHSODFHG
Anti-Short-Cycle Delay
7KHPLGGOHOLQHÀDVKHVDW+]IRUVHFRQGVIROORZHGE\DVHFRQG
GLVSOD\RIWKHQXPEHURIPLQXWHVOHIWRQWKHWLPHUYDOXHLVURXQGHGXS
PLQVHFLVGLVSOD\HGDV,IDFWLYDWHGWKHDQWLVKRUWF\FOHGHOD\WLPH
UHPDLQLQJLVGLVSOD\HGGHIDXOWLVVHFPLQ
Cooling Capacity6KRZVFRROLQJVWDJH&RU&RSHUDWLQJLIQRQ
FRPPXQLFDWLQJ
&RROLQJFRPSUHVVRUFDSDFLW\VHFRQGRQVHFRQGRႇIROORZHGE\
DPELHQWWHPSHUDWXUH
1RQ&RPPXQLFDWLQJWKHUPRVWDWZLWKVHFRQGVWDJHFRROLQJDFWLYHDQG
DPELHQWRI)&SDXVH$UHSHDW
Diagnostic recalO6KRZVWKHODVWVWRUHGGLDJQRVWLFHUURUFRGHV
,I¿UVWHUURULV(VHFRQG(SDXVH(SDXVH
(
1H[WFRGHVXSWRDUHVKRZQXVLQJVDPHPHWKRG
Fault memory clears
,IWKHUHDUHQRHUURUFRGHVVWRUHG(SDXVH.
$IWHUWKHIDXOWPHPRU\LVFOHDUHGWKHIROORZLQJVWULQJÀDVKHVHYHU\
VHFRQGV
SDXVH
Active error in outdoor control Idle mode6KRZDOODFWLYHHUURUV
FRGHV
)ROORZLQJGLVSOD\VWULQJLVUHSHDWHGLI(UURU(DQG(DUHSUHVHQW
(SDXVH(
Active error in run mode6KRZFXUUHQWVWDWXVDQGDOODFWLYHHUURUV
FRGHV
)ROORZLQJGLVSOD\VWULQJLVUHSHDWHGLI(UURU(LVSUHVHQWZKLOHFRROLQJ
GHPDQGLVSHUFHQW
&SDXVH(
Outdoor Ambient Temperature (OAT)
$Q\WLPH2$7LVZLWKLQRSHUDWLQJ
UDQJHYDOXHLVGLVSOD\HGLIXQLWLVLQGLDJQRVWLFDQGQRQGLDJQRVWLF
PRGHV
)ROORZLQJGLVSOD\VWULQJLVUHSHDWHGLIFRROLQJLVDFWLYHDQG2$7LV°)
&SDXVH$SDXVH
Liquid Line Temperature (LIQ)$Q\WLPH/,4LVVHQVHGLQRSHUDWLQJ
UDQJHYDOXHLVGLVSOD\HGLIXQLWLVLQGLDJQRVWLFPRGHRUPDQXDOO\HQDEOHG
IRUQRQGLDJQRVWLFPRGHV
)ROORZLQJGLVSOD\VWULQJLVUHSHDWHGLIFRROLQJLVDFWLYHDQG/,4LV°)
&SDXVH/SDXVH
Charge Mode:KHQXQLWLVLQWKHFKDUJHPRGH6XFWLRQSUHVVXUH
63[[[6XFWLRQ7HPS6W[[[6XSHUKHDW6+[[[/LTXLGSUHVVXUH
/3[[[/LTXLG7HPS/W[[[DQGVXEFRROLQJ6&[[[ZLOOEHVFUROOHGRQ
WKHVHJPHQWGLVSOD\
7KHIROORZLQJVWULQJLVUHSHDWHG
63SDXVH6WSDXVH6+SDXVH/3SDXVH/W
SDXVH6&5HSHDW
Table 10. Outdoor Control 7-Segment Unit Status Displays
7-SEGMENT ALERT AND SYSTEM STATUS CODES (Cont.)
System Operation and Service
3DJH
31-5000949 Rev. 0
PUSH
BUTTON OPERATION
_
_
Allows
call modes.
Outdoor control must be in
IDLE mode (no heating or
cooling operation).
ment display until DASH
lease the button. Once dash starts flashing, proceed to
next step.
Push and hold button until mode
ment display ( , , , or
). Immediately release the button,
proceed to next step.
ment display shows the selected mode and the control performs the selected function.
NOTE - See table 7 for explanation of codes.
Figure 21. Push-Button Operation
,IWKHVLQJOHFKDUDFWHUGLVSOD\VKRZVWKUHHKRUL]RQWDOOLQHVWKHXQLWVHOHFWLRQFRGHQHHGVWREHSURJUDPPHG3UHVVDQGKROGWKH
EXWWRQXQWLOWKH38PHQXRSWLRQLVGLVSOD\HGUHOHDVHEXWWRQ7KHVLQJOHFKDUDFWHUGLVSOD\GLVSOD\VWKHVHOHFWHGPRGHSHUH[DPSOHLQ
Figure 20:KHQWKHGHVLUHGXQLWVHOHFWLRQFRGHDSSHDUVSUHVVDQGKROGWKHEXWWRQXQWLOLWVWRSVÀDVKLQJWKHQUHOHDVH
Unit Code Unit Type Unit Model
92 WRQKHDWSXPS 16+0
93 WRQKHDWSXPS 16+0
94 WRQKHDWSXPS 16+0
95 WRQKHDWSXPS 16+0
UNIT SELECTION CODE FOR OUTDOOR CONTROL
7-SEGMENT ALERT AND SYSTEM STATUS CODES (Cont.)
System Operation and Service
3DJH
31-5000949 Rev. 0
,GOHPRGH±6\VWHPLVHQHUJL]HGZLWKQRGHPDQG±'HFLPDOÀDVKHVDW+HUW]!VHFRQG21VHFRQG2))
Display Symbol or
Character
Display Fan Test and Display String Option
Displayed during
start-up or power
recycling
'LVSOD\VWULQJVKRZVRXWGRRUFRQWURO¿UPZDUHYHUVLRQB!SDXVH!$&RU+3XQLW!SDXVH!XQLW
FDSDFLW\LQ%78V!SDXVH!XQLWFRGH,IKRUL]RQWDOEDUVDUHGLVSOD\HGGXULQJDQ\VHTXHQFHRIWKLVGLVSOD\
VWULQJLWLQGLFDWHVWKDWWKHVSHFL¿FSDUDPHWHULVQRWFRQ¿JXUHG
. ,GOHPRGH²GHFLPDOÀDVKHVDW+HUW]!VHFRQG21VHFRQG2))
& ,QGLFDWHVFRROLQJ&DSDFLW\&RU&LIFRQYHQWLRQDO9$&WKHUPRVWDW
)
,QGLFDWHV\RXDUHLQ
WKHRXWGRRUIDQWHVW
PRGH
Control must be in Idle mode7RHQWHUIDQWHVWRSWLRQ)PRGHSXVKDQGKROG
EXWWRQXQWLOVROLG±DSSHDUVUHOHDVHEXWWRQ'LVSOD\EHJLQVÀDVKLQJ:LWKLQ
VHFRQGVSXVKDQGKROGEXWWRQXQWLOUHTXLUHGV\PERO)GLVSOD\VUHOHDVHEXWWRQ
'LVSOD\EHJLQVÀDVKLQJ:LWKLQVHFRQGVSXVKDQGKROGEXWWRQXQWLOGLVSOD\
VWRSVÀDVKLQJUHOHDVHEXWWRQ&RQWUROZLOOLQLWLDWHRXWGRRUIDQRSHUDWLRQ2XWGRRU
IDQF\FOHV21IRUPLQXWHVDWWKHKLJKHVWVSHHG7RH[LWWHVW±3XVKDQGKROG
EXWWRQXQWLOWKUHHKRUL]RQWDOEDUVGLVSOD\5HOHDVHEXWWRQRXWGRRUIDQF\FOHVOFF.
$
$LQWKHGLVSOD\
VWULQJUHSUHVHQWVWKH
DPELHQWWHPSHUDWXUH
LQ)DWWKHVHQVRURQ
WKHRXWGRRUXQLW
Control can be in Idle or demand mode7RHQWHUGLVSOD\FRQ¿JXUDWLRQRSWLRQ$
PRGHSXVKDQGKROGEXWWRQXQWLOVROLG±DSSHDUVUHOHDVHEXWWRQ'LVSOD\EHJLQV
ÀDVKLQJ:LWKLQVHFRQGVSXVKDQGKROGEXWWRQXQWLOUHTXLUHGV\PERO$GLVSOD\V
UHOHDVHEXWWRQ'LVSOD\EHJLQVÀDVKLQJ:LWKLQVHFRQGVSXVKDQGKROGEXWWRQ
XQWLOGLVSOD\VWRSVÀDVKLQJUHOHDVHEXWWRQ'LVSOD\VKRZVHUURU(FRGHVDQG
DPELHQW$RXWGRRUFRLOFDQGOLTXLG/WHPSHUDWXUHVLQ)DKUHQKHLW
NOTE - If button is not pushed in the 10-second time period, the control exits the
test mode. If this occurs, test mode must be repeated.
G)
G)LQWKHGLVSOD\
LQGLFDWHV)RUFHG
'HIURVW0RGH
(QWHUV)RUFHG'HIURVW0RGH:KLOHWKH16+LVUXQQLQJLQKHDWLQJPRGHSUHVV
3XVK%XWWRQXQWLOD6ROLG³´LVGLVSOD\HGWR(QWHUWKH)LHOG7HVW0RGH3UHVVDQG
+ROGWKHEXWWRQXQWLO³G´LGGLVSOD\HGIRU)RUFHG'HIURVW0RGHWKHUHOHDVHWKH
EXWWRQ3UHVVWKHEXWWRQDJDLQZKLOHWKHGLVSOD\LVÀDVKLQJ³G´WRVHOHFWWKH)RUFHG
'HIURVW0RGH6HH'HIURVW7HVWRQ
SDJH.
Error Code Recall Mode (NOTE – control must be in idle mode)
(
7RHQWHUHUURUFRGHUHFDOOPRGHSXVKDQGKROGEXWWRQXQWLOVROLG(DSSHDUVWKHQUHOHDVHEXWWRQ&RQWUROGLVSOD\VXSWR
HUURUFRGHVVWRUHGLQPHPRU\,I(LVGLVSOD\HGWKHUHDUHQRVWRUHGHUURUFRGHV
Ł
7RH[LWHUURUFRGHUHFDOOPRGHSXVKDQGKROGEXWWRQXQWLOVROLGWKUHHKRUL]RQWDOEDUVDSSHDUWKHQUHOHDVHEXWWRQ
NOTE - (UURUFRGHVDUHQRWFOHDUHG
F
7RFOHDUHUURUFRGHVVWRUHGLQPHPRU\FRQWLQXHWRKROGEXWWRQZKLOHWKHKRUL]RQWDOEDUVDUHGLVSOD\HG5HOHDVHEXWWRQ
ZKHQVROLGFLVGLVSOD\HG
F
3XVKDQGKROGIRURQHVHFRQGUHOHDVHEXWWRQ6HJPHQWGLVSOD\VDQGH[LWVHUURUUHFDOOPRGH
System Operation and Service
Field Test Mode Operation
7KH¿HOGWHVWPRGHDOORZVWKHXQLWWREHSXWLQWRGLDJQRVWLF
PRGHDQGDOORZVWKHLQVWDOOHUWRSHUIRUPPXOWLSOHWHVWVRQWKH
FRQWUROXQLW
Diagnostic Mode
'LDJQRVWLFPRGH LV RQO\ DYDLODEOHZKHQWKH V\VWHP LVLGOH
RUGXULQJDQDFWLYHVXVSHQGHGFDOOIRUKHDWLQJRUFRROLQJ
'LDJQRVWLF PRGH LV WHUPLQDWHG ZKHQ WKH H[LW FRPPDQG LV
JLYHQWKHEXWWRQLVSUHVVHGDQGUHOHDVHG ZLWKRXWHQWHULQJ
WKHGLDJQRVWLFPHQXRUPLQXWHVKDVSDVVHGZKLFKHYHU
FRPHV¿UVW
:KHQ WKLV PRGH LV VHOHFWHG DOO LQVWDOOHG WHPSHUDWXUH
VHQVRUYDOYHVQRQRSHQDQGQRQVKRUWDUHVKRZQRQWKH
VHJPHQW GLVSOD\7KH IROORZLQJ V\VWHP VWDWXV FRGHV DUH
GLVSOD\HG
• &RROLQJ
• &RROLQJVWDJHRUFRROLQJSHUFHQWDJHGHPDQGRSHUDWLRQ
• $FWLYHHUURUFRGHV
Outdoor Fan Mode
'LDJQRVWLFPRGHLVRQO\DYDLODEOHZKLOHWKHV\VWHPLVLQLGOH
PRGH7KLVPRGHFDQEHH[LWHGZLWKWKHSURSHUFRPPDQGRU
DIWHUPLQXWHVKDVSDVVHG
,QGLDJQRVWLFPRGHWKHFRQWUROHQHUJL]HVWKHRXWGRRUIDQDW
WKHKLJKHVWVSHHG
Forced Defrost Test
7KH 'HIURVW &\FOH FDQ EH WHVWHG IRU GHIURVW GLDJQRVLWLF
SXUSRVHVRU GXULQJ VHUYLFH SURFHGXUHVWRLQLWLDWH D GHIURVW
F\FOH WR FOHDU WKH RXWGRRU FRLO RI IURVW RU LFH 7KH )RUFHG
'HIURVW 0RGH LV LQLWLDWHG E\ WKH 2XWGRRU 8QLWDU\ &RQWURO
SXVKEXWWRQ6HH'HIURVW7HVWLQJRQSDJH
3DJH
31-5000949 Rev. 0
System Operation and Service
Charge Mode
Disabled
Charge Mode
Enabled
Charge Mode Operation
7RLQLWLDWHWKH16+0&KDUJH0RGHIXQFWLRQLQVWDOO
WKHMXPSHUDFURVVWKHWZR&KDUJH0RGH3LQV&+5*
02'(RQWKHRXWGRRUFRQWURO7KH&KDUJH0RGHFDQEH
XVHGZKHQFKDUJLQJWKHV\VWHPZLWKUHIULJHUDQWFKHFNLQJ
WKHUHIULJHUDQWFKDUJHSXPSLQJGRZQWKHV\VWHPDQG
SHUIRUPLQJRWKHUVHUYLFHSURFHGXUHVWKDWUHTXLUHVRXWGRRU
XQLWRSHUDWLRQDWFDSDFLW\
Charge Mode Operation with a Conventional 24VAC
Non-Communicating Heat Pump Thermostat – Cooling
Mode
2QDSSOLFDWLRQVZLWKDFRQYHQWLRQDO9$&QRQ
FRPPXQLFDWLQJWKHUPRVWDWWKHFKDUJHPRGHMXPSHUPXVW
EHLQVWDOOHGRQWKH&KDUJH0RGH3LQVDIWHUSURYLGLQJD<
FRPSUHVVRUGHPDQGWRWKHXQLWWRLQLWLDWHWKH&KDUJH0RGH
:KHQXVLQJWKH&KDUJH0RGHLQWKHFRROLQJPRGHWKH³2´
PXVWDOVREHSURYLGHGZLWKD9VLJQDOWRSODFHUHYHUVLQJ
YDOYHLQWKHFRROSRVLWLRQ,QWKHKHDWLQJPRGHRQO\D<
FRPSUHVVRUGHPDQGLVUHTXLUHGDORQJZLWKWKHEORZHU
GHPDQGIRUWKHIXOOFRROLQJDLUYROXPH$FRROLQJEORZHU
GHPDQGPXVWDOVREHSURYLGHGWRLQLWLDWHEORZHURSHUDWLRQ
RQWKHFRROLQJVSHHGRQWKHLQGRRUXQLW7KHFRPSUHVVRU
DQGRXWGRRUIDQPRWRUZLOORSHUDWHDWFDSDFLW\7R
H[LWWKHFKDUJLQJPRGHUHPRYHWKH&KDUJH0RGH-XPSHU
DQGUHPRYHWKH<FRPSUHVVRUGHPDQGDQGLQGRRUEORZHU
GHPDQG7KH&KDUJH0RGHKDVDPD[LPXPWLPHRI
PLQXWHVDQGZLOODXWRPDWLFDOO\H[LWWKHFKDUJHPRGHDIWHU
PLQXWHVLIWKHFKDUJHPRGHMXPSHULVOHIWLQSODFH
Display Display and Action (normal operation)
1R&KDQJHLGOH 1R&KDQJHLGOH
6ROLG
(QWHURUH[LW¿HOGWHVWDQGSURJUDPPRGH
6ROLG$
3XWVXQLWLQGLDJQRVWLFPRGH'LVSOD\VDPELHQWWHPSHUDWXUHVDQGDQ\DFWLYHHUURUFRGHV
6ROLGF
&OHDUVHUURUKLVWRU\
6ROLG(
(QWHUGLDJQRVWLFUHFDOOPRGH'LVSOD\VXSWRHUURUFRGHVLQPHPRU\
6ROLG) 6WDUWVRXWGRRUIDQ
6WULQJ38
(QWHUXQLWFRGHSURJUDPPLQJ
6WULQJG)
(QWHUV)RUFHG'HIURVW0RGH3URYLGHV'HIURVW7HVW,QLWLDWHVD)RUFHG'HIURVWWR'HIURVWWKHRXWGRRUFRLO6HH
'HIURVW7HVWRQ3DJH
.
,GOHPRGH²GHFLPDOÀDVKHVDW+HUW]!VHFRQG21VHFRQG2))
&
&RROLQJRSHUDWLRQ6KRZVFRROLQJVWDJH&RU&RSHUDWLQJLIQRQFRPPXQLFDWLQJ6KRZVFRROLQJFDSDFLW\
SHUFHQWDJHLH&RSHUDWLQJLILQVWDOOHGZLWKD$FRPPXQLFDWLQJWKHUPRVWDW([DPSOH&SDXVH$
(
(LQWKHGLVSOD\VWULQJUHSUHVHQWVWKHDFWLYHHUURUFRGHVLQWKHRXWGRRUXQLW
([DPSOH&SDXVH(SDXVH(SDXVH$SDXVH
$
$LQWKHGLVSOD\VWULQJUHSUHVHQWVWKHRXWGRRUDPELHQWWHPSHUDWXUHLQ)DWWKHRXWGRRUVHQVRURQWKHRXWGRRU
XQLW
([DPSOH&SDXVH$
6FUROOLQJ
:KHQXQLWLVLQWKHFKDUJHPRGH6XFWLRQSUHVVXUH63[[[6XFWLRQ7HPS6W[[[6XSHUKHDW6+[[[
/LTXLGSUHVVXUH/3[[[/LTXLG7HPS/W[[[DQGVXEFRROLQJ6&[[[ZLOOEHVFUROOHGRQWKHVHJHPHQW
GLVSOD\
([DPSOH63SDXVH6WSDXVH6+SDXVH/3SDXVH/WSDXVH6&5HSHDW
1RFKDQJHLQGLFDWHVWKHGLVSOD\ZLOOFRQWLQXHWRVKRZZKDWHYHULVFXUUHQWO\EHLQJGLVSOD\HGIRUQRUPDORSHUDWLRQV
1RWHRQFHWKHHUURUKLVWRU\LVGHOHWHGLWFDQQRWEHUHFRYHUHG$IWHUWKHKLVWRU\LVGHOHWHGWKHXQLWZLOOUHVHWLWVHOI
Table 11. Field Test, Diagnostic Recall and Program Menu Options
3DJH
31-5000949 Rev. 0
TYPICAL 7-SEGMENT ACTIVE COOLING DEMAND DISPLAY STRING
&
(
$
SECOND STAGE
COOLING DEMAND
ACTIVE ERROR
CODE (IF PRESENT)
OUTDOOR AMBIENT
AIR TEMP
BY DEFAULT, COOLING DEMAND, ACTIVE ERROR CODES
AND OUTDOOR AMBIENT TEMPERATURE ARE DISPLAYED.
Figure 22. Typical 7-Segment Demand Display String
System Operation and Service
3DJH
31-5000949 Rev. 0
Figure 23. &RQ¿JXULQJ8QLW6HOHFWLRQ&RGH
System Operation and Service
Outdoor control is in IDLE mode
(No heating or cooling demand)
Turn room thermostat
to OFF
Push and hold button until the solid
38 sequence is displayed on the
7-segment display then immediately
release the button. This
configuration sequence allows the
installer to select unit selection
code (number combination) that matches
the outdoor unit type and inverter.
If three horizontal bars display in any
part of the 7-segment display string
during power-up, the outdoor
control did not store the unit
selection code. If this occurs, the
configuration sequence for that
section of the display string must be
repeated.
Yes
No
−
−
−
_
_
−
−
−
NOTE - Either the 38 sequence
will repeat 5 times and if a
selection is not made, the control
will return to idle mode.
NOT
SELECTED
SELECTED
Configuring Unit Selection Code
Power-up - Unit selection code (two-digit number) displayed
represents unit size code (outdoor unit capacity).
During initial power-up, firmware version, unit type, unit capacity
and unit selection code will appear on the 7-segment display.
96
97
98
99
2-TON AIR CONDITIONER
3-TON AIR CONDITIONER
4-TON AIR CONDITIONER
5-TON AIR CONDITIONER
SELECTED
NOT
SELECTED
UNIT SELECTION
CODE
When the correct unit section code is displayed, release
button immediately. [Display flashes.]
1.
2. Push and hold button until selection stops flashing during
one of the three cycles. [Release push button]
3. If selection is not made during those three cycles the control
returns to idle mode.
figuration mode and resets.
UNIT SELECTION
CODES
Press and hold the button during
the 38 cycling display.
the
UNIT
EXAMPLE 7-SEGMENT DISPLAY STRING
FIRMWARE
VERSION
UNIT
TYPE
UNIT
CAPACITY
UNIT
CODE
.
IDLE MODE
(NO DEMAND)
.
(NS22A24M)
(NS22A36M)
(NS22A48M)
(NS22A60M)
If three horizontal bars are shown in the 7-segment display
during power-up, the outdoor control did not store the last
configuration setting. If this happens, the configuration
sequence for that setting mush be repeated.
To enter unit selection
mode, push and hold the
button next to the 7-segment
display until DASH symbol
appears and immediately
release button. Once DASH
starts flashing, proceed to next step.
CONFIGURING UNIT
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31-5000949 Rev. 0
System Operation and Service
CONFIGURING UNIT (Cont.)
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31-5000949 Rev. 0
System Operation and Service
CONFIGURING UNIT (Cont.)
Defrost Function (Cont.)
Defrost Cycle Time
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Installations with a Conventional 24VAC Heat Pump
Thermostat
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DEFROST TERMINATION
JUMPER
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SENSOR LOCATION
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31-5000949 Rev. 0
Maintenance
OUTDOOR UNIT
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3DJH
31-5000949 Rev. 0
Unit Wiring Diagrams
Figure 25. Typical Unit Wiring (NS21H**M)
2
Supersedes
Litho U.S.A.
C
1
RT13
AMBIENT
SENSOR
U
V
W
B1
COMPRESSOR
S4 HIGH
PRESSURE
SWITCH
TP
HI PS
C
R
O
B4
FAN
K1-2
3
COMPRESSOR
CONTACTOR
S40
HR1
CRANKCASE
THERMOSTAT
CRANKCASE
HEATER
RT36
LIQUID
SENSOR
NOTE-
FOR USE WITH COPPER CONDUCTORS
ONLY. REFER TO UNIT RATING PLATE
FOR MINIMUM CIRCUIT AMPACITY AND
MAXIMUM OVERCURRENT PROTECTION SIZE
REFER TO COMPRESSOR IN UNIT FOR
ACTUAL TERMINAL ARRANGEMENT
COMPRESSOR
CONTACTOR
RED
L2
2
K1-1
i
i
-
+
HEAT PUMP
OUTDOOR UNIT
WARNING-ELECTRIC SHOCK HAZARD
CAN CAUSE INJURY OR DEATH. UNIT
MUST BE GROUNDED IN ACCORDANCE
WITH NATIONAL AND LOCAL CODES
BLACK
BROWN
RED
3
2011
REV
CNTCTR
FAN PWM
COM
Y1
K1
B
A
BROWN
S4
S173
S173
COMPRESSOR TOP
CAP THERMAL SWITCH
R7
RESISTOR
(10K)
RED
BLACK
YELLOW
WHITE
A175
1
OUTDOOR
CONTROL
L1
4
3
1
2
B1
COMPRESSOR
INVERTER
BLUE
RED
YELLOW
2
BLUE
U
V
W
COMM
POWER
BROWN
U
V
W
REACTOR
RED
BLACK
BLUE
WHITE
DIS
AMB
COIL
RT13
RT_SUCTION
SENSOR
RT41
SUCT P
LOW PRESSURE
TRANSDUCER
A168
1234
RT_LIQUID
SENSOR
RT36
SUCT/
LIQ T
LIQ P
HIGH PRESSURE
TRANSDUCER
A188
RT41
SUCTION
SENSOR
RED
WHITE
RT21
L1
B
A
EEV
COIL
24V
T1
240V
COM
EEV
CONTROLLER
VM
B-
A-
B
A
YELLOW
ORANGE
BLUE
BLK
RED
COM
S1
BLUE
COM
24VAC
YEL
R
i-
i+
c
REVERSING
VALVE
R
i-
i+
c
NOTE
-IF ANY WIRE IN THIS APPLIANCE IS REPLACED,IT
MUST BE REPLACED WITH WIRE OF LIKE SIZE,
RATING, INSULATION THICKNESS, AND TERMINATION.
WHITE
WHITE
BLUE
BLUE
BROWN
BLACK
BLACK
BROWN
L45
SOLENOID
GROUND
LUG
K1
COMPRESSOR
CONTACTOR
REACTOR
INVERTER
U
V
W
COM
FAN PWM
O OUT
CNTCTR
HI PS
TP
LO PS
A175
O Out
CNCTR
HI PS
TP
LO PS
EEV
CONTROLLER
T1
TRANSFORMER
RED
BLACK
DENOTES OPTIONAL COMPONENTS
CLASS II VOLTAGE FIELD WIRING
LINE VOLTAGE FIELD INSTALLED
EQUIPMENT
GROUND
RT61
RT61
COMP DISCHARGE
SENSOR
YELLOW
COMP
SUCTION
SENSOR
3DJH
31-5000949 Rev. 0
Unit Wiring Diagrams
Figure 26. Typical Unit Wiring (NS21H**M)
3DJH
31-5000949 Rev. 0
Unit Sequence of Operation
Figure 27. 24 Volt Power-Up or Outdoor Reset
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Yes
No
Yes
No
Room thermostat provides a Y1 or Y2 demand to
the main control on systems with a conventional
24VAC thermostat.
All switches closed
ing range.
Check for status or
fault codes in the
outdoor control or
room thermostat.
(NOTE - Refer to low
pressure and high
pressure switch flow
charts for sequence
of operation.
1. View the HEAT PUMP screen
for current compressor frequency
in hertz.
2. View the AIR HANDLER screen for
actual CFM of the indoor blower
motor.
From idle mode
Outdoor Control
1. Sends a demand to the compressor
inverter to start and run the
compressor up to the requested
pumping capacity (Frequency in
hertz).
2.
Output signal is provided on PWM
and COM terminals to start and run the
ECM outdoor fan at the demand RPM.
3. Sends a communication signal into
the indoor unit to start and run the
supply fan motor at the demand air
volume (CFM).
On 24 VAC power-up or outdoor reset, the outdoor control shall perform the following tasks:
1. Start the anti-short cycle 3-minute delay in the outdoor control.
2. Check status of the temperature sensor and pressure devices.
3. If the outdoor control does not detect any error codes, outdoor control sends 24 volts out on the
CNTCTR terminals to pull in the contactor coil. ( - These checks take about 60 seconds.)
4. The contactor contacts pull IN and main power is applied to the compressor inverter.
Diagnostic Screen
NOTE
3DJH
31-5000949 Rev. 0
Unit Sequence of Operation
Figure 28. Low Pressure Switch Emulation by Suction Pressure Transducer Logic Sequence of Operations
Y1 DEMAND
OR COOLING
DEMAND
*SUCTION
PRESSURE ABOVE
CUT-OUT OF
35 PSIG
CONTACTOR
ENERGIZED
SUCTION
PRESSURE
CUT-OUT IS
IGNORED FOR
90 SECONDS
SUCTION PRESSURE
ABOVE CUT-OUT
OF 35 PSIG
CONTACTOR
DE-ENERGIZED
ANTI-SHORT
CYCLE TIMER
BEGINS
INCREMENT
5-STRIKE
COUNTER
1
LED ALERT
CODE / OR
SERVICE SOON
ALERT 410
DISPLAYED
ANTI-SHORT
CYCLE TIMER
ENDS
CONTACTOR
ENERGIZED
WAITING FOR
PRESSURE
TO RISE ABOVE
80 PSIG
IS BYPASSED IF OUTDOOR
AMBIENT TEMPERATURE IS 15ºF
OR BELOW
SUCTION PRESSURE CUT-OUT
3
5-STRIKE
COUNTER
REACHES 5
WITHIN A SINGLE
Y1 DEMAND
LOW
PRESSURE
LOCKOUT
LED ALERT
CODE / OR
SERVICE URGENT
ALERT 411
DISPLAYED
SERVICE
REQUIRED
2
LED ALERT
CODE / OR
SERVICE SOON
ALERT 410
DISPLAYED
SERVICE
REQUIRED
2
NORMAL
OPERATION
CLOSED
CLOSED
OPEN
OPEN
OPEN
CLOSED
CLOSED
1.
The thermostat terminates demand when the contactor
is de-energized. If demand is satisfied when alarm is
not active, the 5-strike counter resets.
2.
door control (A175) R terminal.
3. The low pressure switch is ignored when the
outdoor temperature is below 15°F.
SUCTION
PRESSURE ABOVE
CUT-IN OF
35 PSIG
NO
NOTE -Unit does not have a low pressure
switch and LPS terminals are not jumpered.
The unit has a suction pressure transducer
that emulates the low pressure switch with a
cut-out of 35 PSIG.
3DJH
31-5000949 Rev. 0
Unit Sequence of Operation
Figure 29. High Pressure Switch (S4) Sequence of Operation (All Versions)
Y1 DEMAND
OR COOLING
DEMAND
HIGH
PRESSURE
SWITCH (S4)
CONTACTOR
ENERGIZED
HIGH
PRESSURE
SWITCH (S4)
CONTACTOR
DE-ENERGIZED
ANTI-SHORT
CYCLE TIMER
BEGINS
INCREMENT
5-STRIKE
COUNTER
1
LED ALERT
CODE / OR
SERVICE SOON
ALERT 412
DISPLAYED
ANTI-SHORT
CYCLE TIMER
ENDS
HIGH
PRESSURE
SWITCH (S4)
WAITING FOR
PRESSURE
SWITCH TO
CLOSE
5-STRIKE
COUNTER
REACHES 5
WITHIN A SINGLE
Y1 DEMAND
HIGH
PRESSURE
SWITCH (S4)
LOCKOUT
LED ALERT
CODE / OR
SERVICE URGENT
ALERT 413
CLEARED
SERVICE
REQUIRED
2
LED ALERT
CODE / OR
SERVICE SOON
ALERT 412
DISPLAYED
NORMAL
OPERATION
CLOSED
CLOSED
OPEN
OPEN
OPEN
CLOSED
CLOSED
TOP CAP
SWITCH (S173)
CLOSED
SERVICE
REQUIRED
2
1. The thermostat terminates demand when the contactor is
de-energized. If demand is satisfied when alarm is not active, the
5-strike counter resets.
2. Lockouts can be reset by cycling power off to the outdoor control
(A175) R terminal.
3DJH
31-5000949 Rev. 0
Unit Sequence of Operation
Figure 30. Low Pressure Switch Emulation by Suction Pressure Transducer Logic Sequence of Operations
START DEFROST
STATE
ACCUMULATE FROST
ACCUMULATION TIME – HP RUN
TIME IF COIL TEMP BELOW 35°F
IF DEFROST CYCLE TIME IS
CLOSE TO TARGET DEFROST
CYCLE TIME (BETWEEN
80% - 120% TARGET DEFROST
CYCLE TIME) – NO CHANGE IN
FROST ACCUMULATION TIME
INITIATE DEFROST CYCLE IF
FROST ACCUMULATION TIME
EXCEEDS TARGET FROST
ACCUMULATION
TIME (INITIALLY 90 MIN.)
IF DEFROST CYCLE TIME IS
SHORT (80% OR LESS OF
TARGET DEFROST CYCLE TIME)
– FROST ACCUMULATION TIME
INCREASED BY 30 MIN.
DEFROST CYCLE WILL RUN AND
THE TIME IS COMPARED TO
TARGET DEFROST CYCLE TIME
(100S/133S/105S/102S)
DEFROST CYCLE TIME WILL BE
MEASURED UNTIL COIL TEMP
REACHES 50°F
DEFROST WILL TERMINATE
WHEN COIL TEMP REACHES
TERMINATION TEMP
RETURN TO HP HEATING
AND RESET RUN TIMER
IF DEFROST CYCLE TIME IS
LONG (120% OR MORE OF
TARGET DEFROST CYCLE TIME)
– FROST ACCUMULATION TIME
DECREASED BY 30 MIN.
IF DEFROST CYCLE TIME IS
SIGNIFICANTLY LONGER (200%
OR MORE OF TARGET
DEFROST CYCLE TIME)
OR TERMINATES AT 14m MAX
TIME – FROST ACCUMULATION
TIME IS SET TO 30 MIN.
LOW AMBIENT DEFROST
OAT<10F, SET FROST
ACCUMULATION TIME
TO 360 MIN.
WHEN OAT INCREASES
TO >15F, RESET FROST
ACCUMULATION TIME TO 90MIN.
3DJH
31-5000949 Rev. 0
Component Testing
VERIFYING HIGH PRESSURE SWITCH AND LOW PRESSURE PROTECTION
OPERATION
Operation:
7KH XQLW¶V KLJK SUHVVXUH VZLWFK +366 LV ZLUHG LQ WKH
FRQWURO+36WHUPLQDOV
7KH XQLW GRHV QRW KDYH D ORZ SUHVVXUH VZLWFK DQG /36
WHUPLQDOVDUHQRWMXPSHUHG7KHXQLWKDVDVXFWLRQSUHVVXUH
WUDQVGXFHU $ WKDW HPXODWHV WKH ORZ SUHVVXUH VZLWFK
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SURYLGHV WKH VDPH SURWHFWLRQ DV D WUDGLWLRQ ORZ SUHVVXUH
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EDFN XS SURWHFWLRQ LV SURYLGHGE\ WKH VXFWLRQ WHPSHUDWXUH
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Low Suction Pressure Protection (LPS) –6HHFigure 28
IRUORZVXFWLRQSUHVVXUHSURWHFWLRQVHTXHQFHRIRSHUDWLRQ
High Pressure Switch (HPS) – 6HH Figure 29 IRU KLJK
SUHVVXUHVZLWFKVHTXHQFHRIRSHUDWLRQ
Pressure Switch Event Settings
7KH IROORZLQJ SUHVVXUHV DUH WKH DXWRUHVHW HYHQW YDOXH
WULJJHUVIRUORZDQGKLJKSUHVVXUHWKUHVKROGV
+LJK3UHVVXUHDXWRUHVHWWULSDWSVLJUHVHWDW
/RZ3UHVVXUHDXWRUHVHW±WULSDWSVLJUHVHWDW
Checkout – S4 High Pressure Switch
8VLQJ D PXOWLPHWHU VHW WR RKPV ZLWK WKH WHUPLQDOV
GLVFRQQHFWHGIURP WKH FRQWURO ERDUGFKHFN WKH UHVLVWDQFH
EHWZHHQ WKH WZR WHUPLQDOV RI WKH SUHVVXUH VZLWFK ,I WKH
UHVLVWDQFHUHDGLQJLVRKPVWKHVZLWFKLVFORVHG
Figure 31. Low Pressure Switch Emulation by Suction
Pressure Transducer Logic Sequence of Operations
Verifying Suction Pressure Transducer
Operation
8VLQJ D PXOWLPHWHU VHW WR 9'& ZLWK WKH 6XFWLRQ 3UHVVXUH
7UDQVGXFHU FRQQHFWHG WR WKH ³6XFW 3´ SLQ FRQQHFWRU RQ
WKHFRQWUROERDUG3LQ5HGZLUH9'&WR3LQ%ODFN
ZLUH*1'VKRXOGUHDG9'&FRQWLQXRXV3LQ%OXHZLUH
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WR9'&DQGZLOOYDU\GHSHQGLQJRQVXFWLRQSUHVVXUH
PHDVXUHG6HHTable 12.
Figure 32. Suction Pressure Transducer Voltage
Table 12. Suction Pressure Transducer Output Voltage
6+,*+
35(6685(
6:,7&+
VDC
Suction
Pressure
(PSIG)
DC Voltage
Output (Pin 2
to Pin 3)
Suction
Pressure
(PSIG)
DC Voltage
Output (Pin 2
to Pin 3)
0 0.49 110 2.69
10 0.69 120 2.89
20 0.89 130 3.09
30 1.09 140 3.29
40 1.29 150 3.49
50 1.49 160 3.69
60 1.69 170 3.89
70 1.89 180 4.09
80 2.09 190 4.29
90 2.29 200 4.49
100 2.49 210 4.50
3DJH
31-5000949 Rev. 0
VERIFYING HIGH PRESSURE SWITCH AND LOW PRESSURE PROTECTION
OPERATION (Cont.)
Verifying Suction Pressure Transducer
Operation
8VLQJ D PXOWLPHWHU VHW WR 9'& ZLWK WKH /LTXLG 3UHVVXUH
7UDQVGXFHU FRQQHFWHG WR WKH ³/LT 3´ SLQ FRQQHFWRU RQ
WKHFRQWUROERDUG3LQ5HGZLUH9'&WR3LQ%ODFN
ZLUH*1'VKRXOGUHDG9'&FRQWLQXRXV3LQ%OXHZLUH
RXWSXWIURPWUDQVGXFHUWR3LQ%ODFN*1'VKRXOGUHDG
WR9'&DQGZLOOYDU\GHSHQGLQJRQOLTXLGaSUHVVXUH
PHDVXUHG6HHTable 13.
Figure 33. Suction Pressure Transducer Voltage
Table 13. Suction Pressure Transducer Output Voltage
Component Testing
VDC
Liquid Pressure
(PSIG)
DC Voltage Output
(Pin 2 to Pin 3)
Liquid Pressure
(PSIG)
DC Voltage Output
(Pin 2 to Pin 3)
Liquid Pressure
(PSIG)
DC Voltage Output
(Pin 2 to Pin 3)
0 0.50 210 1.90 420 3.30
10 0.57 220 1.97 430 3.37
20 0.63 230 2.03 440 3.43
30 0.70 240 2.10 450 3.50
40 0.77 250 2.17 460 3.57
50 0.83 260 2.23 470 3.63
60 0.90 270 2.30 480 3.70
70 0.97 280 2.37 490 3.77
80 1.03 290 2.43 500 3.83
90 1.10 300 2.50 510 3.90
100 1.17 310 2.57 520 3.97
110 1.23 320 2.63 530 4.03
120 1.30 330 2.70 540 4.10
130 1.37 340 2.77 550 4.17
140 1.43 350 2.83 560 4.23
150 1.50 360 2.90 570 4.30
160 1.57 370 2.97 580 4.37
170 1.63 380 3.03 590 4.43
180 1.70 390 3.10 600 4.50
190 1.77 400 3.17
200 1.83 410 3.23
3DJH
31-5000949 Rev. 0
Component Testing
HIGH PRESSURE SWITCH AND LOW PRESSURE PROTECTION ERRORS
Table 14. Outdoor Control 7-Segment Display Alert Codes
COMPRESSOR OPERATION, CHECKOUT AND STATUS / ERROR CODES
Operation:
7KH XQLW XVHV D 9$& WKUHH SKDVH YDULDEOH FDSDFLW\
URWDU\ FRPSUHVVRU VSHFL¿FDOO\ GHVLJQHG IRU XQLWDU\ VSOLWV
V\VWHPDQGLVDSSURYHGIRUXVHZLWK5%UHIULJHUDQW7KH
FRPSUHVVRU ZKHQ FRQQHFWHG WR DQ LQYHUWHU LV FDSDEOH RI
RSHUDWLQJLQDUXQQLQJIUHTXHQF\UDQJHIURPKHUW]XSWR
DPD[LPXPRIKHUW]PD[LPXPKHUW]LV GHSHQGHQWRQ
FRPSUHVVRUVL]H7KHFRPSUHVVRUVSHHGLVGHWHUPLQHGE\
WKHUPRVWDW GHPDQG DQG VXFWLRQ SUHVVXUH ZKHQ LQVWDOOHG
ZLWKDFRQYHQWLRQDO9$&QRQFRPPXQLFDWLQJWKHUPRVWDW
Checkout:
NOTE - 7KH FRPSUHVVRU PRWRU ZLQGLQJ UHVLVWDQFH LV WKH
QRPLQDO UHVLVWDQFH DW ) :KHQ PHDVXULQJ FRPSUHVVRU
PRWRUZLQGLQJUHVLVWDQFHWKHSULPDU\FRQFHUQLVWKHZLQGLQJ
UHVLVWDQFHEHWZHHQ WKHGLႇHUHQWVHWV RIWHUPLQDOV LV ZLWKLQ
RIHDFKRWKHU7KHDFWXDOZLQGLQJUHVLVWDQFHLVLPSDFWHG
E\ WHPSHUDWXUH UHIULJHUDQW DQG RLO 'R QRW DXWRPDWLFDOO\
FRQGHPQD FRPSUHVVRU EHFDXVH WKHPHDVXUHG UHVLVWDQFH
LVVOLJKWO\KLJKHURUORZHUWKDQWKHQRPLQDOUHVLVWDQFH&KHFN
IRU VKRUWHGRSHQ ZLQGLQJV DQG IRUVKRUWV WR JURXQG GXULQJ
WHVWLQJ
Figure 34. Compressor Operation, Checkout and Status/Error Codes
6\VWHPIDXOWDQGORFNRXWFRGHVWDNHSUHFHGHQFHRYHUV\VWHPVWDWXVFRGHVFRROLQJKHDWLQJRSHUDWLQJSHUFHQWDJHVRUGHIURVWGHKXPLGL¿FDWLRQ2QO\
WKHODWHVWDFWLYHIDXOWRUORFNRXWFRGHVDUHGLVSOD\HGLISUHVHQW,IQRIDXOWRUORFNRXWFRGHVDUHDFWLYHWKHQV\VWHPVWDWXVFRGHVDUHGLVSOD\HG
Alert Codes Priority Alarm Description Possible Causes and Clearing Alarm
E 410 6HUYLFH6RRQ
7KHRXWGRRUXQLWF\FOHG
RႇGXHWRORZSUHVVXUH
VZLWFKRSHQLQJ
8QLWSUHVVXUHLVEHORZWKHORZHUOLPLW7KHV\VWHPLVVKXWGRZQ7KH
ORZSUHVVXUHVZLWFKFORVHVDERYH36,*DQGRSHQVEHORZ36,*
&RQ¿UPWKDWWKHV\VWHPLVSURSHUO\FKDUJHGZLWKUHIULJHUDQW&KHFN7;9
LQGRRUXQLWEORZHUPRWRUGLUW\¿OWHUVRUFORJJHGUHIULJHUDQW¿OWHU&RQ¿UP
WKDWWKHHYDSRUDWRUFRLOLVFOHDQ7KHDODUPFOHDUVDIWHUWKHSUHVVXUHVZLWFK
RSHQVRUDIWHUDSRZHUUHVHW
E 411 6HUYLFH8UJHQW
7KHORZSUHVVXUH
VZLWFKKDVRSHQHG
WLPHVZLWKLQRQHKRXU
$VDUHVXOWWKHRXWGRRU
XQLWLVORFNHGRXW
/RZSUHVVXUHVZLWFKHUURUFRXQWUHDFKHGVWULNHV7KHORZSUHVVXUH
VZLWFKIRU5%RSHQVDW36,*DQGUHVHWVDW36,*&RQ¿UPWKDW
WKHV\VWHPLVSURSHUO\FKDUJHGZLWKUHIULJHUDQW&KHFNIRUFORJJHG7;9
EORFNDJHWRLQGRRUXQLWEORZHUPRWRUGLUW\¿OWHUVRUFORJJHGUHIULJHUDQW
¿OWHU&RQ¿UPWKDWWKHHYDSRUDWRUFRLOLVFOHDQ7KHDODUPFOHDUVDIWHUD
SRZHUUHVHW
E 412 6HUYLFH6RRQ
7KHRXWGRRUXQLWKLJK
SUHVVXUHVZLWFKKDV
RSHQHG
8QLWSUHVVXUHLVDERYHWKHXSSHUOLPLW6\VWHPLVVKXWGRZQ7KHKLJK
SUHVVXUHVZLWFKRSHQVDW36,*DQGFORVHVDW36,*&RQ¿UPWKDW
WKHV\VWHPLVSURSHUO\FKDUJHGZLWKUHIULJHUDQW&KHFNIRUFORJJHG7;9
EORFNDJHWRLQGRRUXQLWEORZHUPRWRUFORJJHGUHIULJHUDQW¿OWHU&RQ¿UP
WKDWWKHRXWGRRUXQLWLVFOHDQ7KHDODUPFOHDUVDIWHUWKHSUHVVXUHVZLWFK
FORVHVRUDSRZHUUHVHW)RUKHDWLQJLQGRRU&)0PD\EHVHWWRRORZ)RU
]RQLQJV\VWHP]RQH&)0PD\EHVHWWRRORZ
E 413 6HUYLFH8UJHQW
7KHKLJKSUHVVXUH
VZLWFKKDVRSHQHG
WLPHVZLWKLQRQHKRXU
$VDUHVXOWWKHRXWGRRU
XQLWLVORFNHGRXW
2SHQKLJKSUHVVXUHVZLWFKHUURUFRXQWUHDFKHGVWULNHV6\VWHPLVVKXW
GRZQ7KHKLJKSUHVVXUHVZLWFKIRU5%ZLOORSHQDW36,*DQG
FORVHDW36,*&RQ¿UPWKDWWKHV\VWHPLVSURSHUO\FKDUJHGZLWK
UHIULJHUDQW&KHFNFRQGHQVHUIDQPRWRUFORJJHG7;9EORFNDJHWRLQGRRU
XQLWEORZHUPRWRUVWXFNUHYHUVLQJYDOYHRUFORJJHGUHIULJHUDQW¿OWHU
&RQ¿UPWKDWWKHRXWGRRUXQLWLVFOHDQ7KHDODUPFOHDUVDIWHULQGRRUSRZHU
UHVHW9$&SRZHUVRXUFHWR2XWGRRU&RQWURO
527$5<
&2035(6625
MOTOR WINDING RESISTANCE AT 77° (±7%)
UNIT U-V/T1-T2 V-W/T2-T3 W-U/T3-T1
16+0
16+0
16+0
16+0
3DJH
31-5000949 Rev. 0
Component Testing
COMPRESSOR OPERATION, CHECKOUT AND STATUS / ERROR CODES (Cont.)
IMPORTANT:,IFRPSUHVVRUUHSODFHPHQWLVUHTXLUHGUHPRYHWKHFRPSUHVVRUWKURXJKWKHWRSRIWKHXQLW5HPRYDOWKURXJK
WKHDFFHVVSDQHOLVQRWSRVVLEOH
(OHFWULFDO
&RQQHFWLRQ
3OXJ/RFDWLRQ
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7RS&DS
7KHUPRVWDW
6
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9DOYH
527$5<&2035(6625 &87$:$<2)7<3,&$/
527$5<&2035(6625
(Not actual compressor)
5RWDU\
&RPSUHVVLRQ
&KDPEHU
Figure 35. Rotary Compressor Detail
COMPRESSOR EQUALIZATION VALVE
7KH FRPSUHVVRU HTXDOL]DWLRQ YDOYH HTXDOL]DWLRQ VROHQRLG
HTXDOL]HV WKH SUHVVXUH DFURVV WKH URWDU\ FRPSUHVVLRQ
FKDPEHU DOORZLQJ WKH FRPSUHVVRU WR VWDUW XQORDGHG 7KH
9$&VROHQRLGFRLOLVFRQWUROOHGE\WKHLQYHUWHU
7KH VROHQRLG FRLO LV SRZHUHG ZKHQ WKH FRPSUHVVRU LV Rႇ
WR HTXDOL]H WKH SUHVVXUH DQG LV GHHQHUJL]HG ZKHQ WKH
FRPSUHVVRULVRSHUDWLQJ
Status Codes
:KHQWKHFRPSUHVVRULVUXQQLQJWKHVHJPHQWGLVSOD\ZLOO
VKRZ WKH FRPSUHVVRU FDSDFLW\ :KHQ WKH XQLW LV LQVWDOOHG
ZLWKD FRQYHQWLRQDO9$&QRQFRPPXQLFDWLQJ WKHUPRVWDW
WKHGLVSOD\ZLOOVKRZ&RU&
3DJH
31-5000949 Rev. 0
COMPRESSOR EQUALIZATION VALVE (Cont.)
Status Codes (Cont)
Component Testing
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&KHFNSLSHFORJJLQJGLVWRUWLRQ
&KHFNFRYHULQJLQGRRUDQGRXWGRRUXQLWV
&KHFN7;9FRQQHFWRUDVVHPEO\FRQGLWLRQDO
QRUPDORSHUDWLRQ
&KHFNUHIULJHUDQWRSHUDWLQJSUHVVXUHV
&KHFNUHVLVWDQFHEHWZHHQHDFKFRPSUHVVRU
WHUPLQDO&RPSDUHUHDGLQJVZLWKFKDUWEHORZ
&KHFNLQVXODWLRQUHVLVWDQFHEHWZHHQFRPSUHVVRU
WHUPLQDODQGSLSH5HSODFHFRPSUHVVRU
DEQRUPDOLW\IRXQG
&KHFNIRUGLVFRQQHFWHGDQGORRVHZLULQJRQ
WHUPLQDOV89DQG:DWLQYHUWHUFRQWURO
&KHFNIRUFRQGLWLRQRIFRPSUHVVRUWHUPLQDOVEDG
FRQWDFWV
&KHFNUHIULJHUDQWRSHUDWLQJSUHVVXUHV
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12
12
12
Figure 36. Compressor Operation, Checkout and Status/Error Codes
ERROR CODES:
6\VWHPIDXOWDQGORFNRXWFRGHVWDNHSUHFHGHQFHRYHUV\VWHPVWDWXVFRGHVFRROLQJKHDWLQJRSHUDWLQJSHUFHQWDJHVRUGHIURVWGHKXPLGL¿FDWLRQ2QO\
WKHODWHVWDFWLYHIDXOWRUORFNRXWFRGHVDUHGLVSOD\HGLISUHVHQW,IQRIDXOWRUORFNRXWFRGHVDUHDFWLYHWKHQV\VWHPVWDWXVFRGHVDUHGLVSOD\HG
Alert
Codes
Inverter
Code
Inverter LED Flash
Code (number of
ÀDVKHV
Priority Alarm Description Possible Causes and Clearing Alarm
Red LED Green LED
E 430 26 ÀDVKHV ÀDVKHV
6HUYLFH
6RRQ
6HUYLFH
8UJHQW
&RPSUHVVRUVWDUW
IDLOXUH
,IFRQGLWLRQLVGHWHFWHGRXWGRRUXQLWFRPSUHVVRUDQG
IDQVWRS$QWLVKRUWF\FOHLVLQLWLDWHG,IFRQGLWLRQRFFXUV
WLPHVZLWKLQDQKRXUV\VWHPLVORFNHGRXW,QGLFDWHV
SRRUFRQQHFWLRQDWFRPSUHVVRUKDUQHVVLPSURSHU
ZLQGLQJUHVLVWDQFHORFNHGFRPSUHVVRUURWRURUÀRRGHG
FRPSUHVVRU7RFOHDUGLVFRQQHFWSRZHUWRWKHLQGRRUXQLW
9$&SRZHUVRXUFHWRWKHRXWGRRUFRQWUROZKLFKZLOO
SRZHURႇWKHRXWGRRUFRQWURODQGZLOORSHQWKHRXWGRRUXQLW
FRQWDFWRUZKLFKLQWHUUXSWVSRZHUWRWKHLQYHUWHUDQGWKHQ
UHDSSO\SRZHU
Table 15. Outdoor Control 7-Segment Display Alert Codes - Compressor
3DJH
31-5000949 Rev. 0
Component Testing
ERROR CODES (Cont.):
6\VWHPIDXOWDQGORFNRXWFRGHVWDNHSUHFHGHQFHRYHUV\VWHPVWDWXVFRGHVFRROLQJKHDWLQJRSHUDWLQJSHUFHQWDJHVRUGHIURVWGHKXPLGL¿FDWLRQ2QO\
WKHODWHVWDFWLYHIDXOWRUORFNRXWFRGHVDUHGLVSOD\HGLISUHVHQW,IQRIDXOWRUORFNRXWFRGHVDUHDFWLYHWKHQV\VWHPVWDWXVFRGHVDUHGLVSOD\HG
Alert
Codes
Inverter
Code
Inverter LED Flash
Code (number of
ÀDVKHV
Priority Alarm Description Possible Causes and Clearing Alarm
Red LED Green LED
E 433 29 ÀDVKHV ÀDVKHV
6HUYLFH
6RRQ
6HUYLFH
8UJHQW
7KHLQYHUWHU
KDVGHWHFWHG
DFRPSUHVVRU
RYHUFXUUHQWFRQGLWLRQ
(UURURFFXUVZKHQFRPSUHVVRUSHDNSKDVHFXUUHQWLV
JUHDWHUWKDQ$,QYHUWHULVVXHVFRGH¿UVWDQGVORZV
GRZQWRWU\WRUHGXFHWKHFXUUHQW,IWKHFXUUHQWUHPDLQV
KLJKRXWGRRUXQLWFRPSUHVVRUDQGIDQVWRS$QWLVKRUWF\FOH
LVLQLWLDWHG,IFRQGLWLRQRFFXUV¿YHWLPHVZLWKLQDQKRXUWKH
8QLWDU\&RQWUROZLOOF\FOHWKHFRQWDFWRUWRSUHYHQWWKHXQLW
IURPORFNLQJRXW
7RFOHDUGLVFRQQHFWSRZHUWRWKHLQGRRUXQLW9$&SRZHU
VRXUFHWRWKHRXWGRRUFRQWUROZKLFKZLOOSRZHURႇWKH
RXWGRRUFRQWURODQGZLOORSHQWKHRXWGRRUXQLWFRQWDFWRU
ZKLFKLQWHUUXSWVSRZHUWRWKHLQYHUWHUDQGWKHQUHDSSO\
SRZHU
E 439 12 ÀDVK ÀDVKHV
6HUYLFH
6RRQ
&RPSUHVVRU
VORZGRZQGXHWRKLJK
LQSXWFXUUHQW
,QSXWFXUUHQWLVDSSURDFKLQJDKLJKOLPLW&RPSUHVVRUVSHHG
DXWRPDWLFDOO\VORZV7KHFRQWUROFRQWLQXHVVHQGLQJWKH
LQYHUWHUVSHHGGHPDQGHGE\WKHWKHUPRVWDW7KHFRQWURO
VHWVLQGRRU&)0DQGRXWGRRU530WRYDOXHVDFFRUGLQJ
WRGHPDQGSHUFHQWDJHUDWKHUWKDQWKHDFWXDO+]$ODUPLV
DXWRPDWLFDOO\FOHDU
E 440 13 ÀDVK ÀDVKHV
,QIRUPD-
WLRQ2QO\
'HDOHU
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7KHFRPSUHVVRU
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VLQNWHPSHUDWXUH7KH
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SHUFHQWDJHUDWKHU
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DPLQRUVSHHGUHGXFWLRQRI+]DSSUR[LPDWHO\D
VSHHGUHGXFWLRQIRUDEULHISHULRGRIWLPHDQGWRUHGXFH
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LVQRUPDODQGH[SHFWHGRSHUDWLRQRIWKHLQYHUWHUFRQWUROOLQJ
WKHFRPSUHVVRUVDIHO\ZLWKLQGHVLJQSDUDPHWHUV
7KHLQYHUWHU¿QQHGDOXPLQXPKHDWVLQNLVORFDWHGRQWKH
EDFNVLGHRIWKHLQYHUWHULQWKHFRQGHQVHUDLUVWUHDP,I
WKHDOHUWFRGHRFFXUIUHTXHQWO\HVSHFLDOO\DWORZHU
RXWGRRUWHPSHUDWXUHVFKHFNWKHKHDWVLQNIRUGHEULVWKDW
PD\UHGXFHKHDWWUDQVIHURUSRVVLEOHREVWUXFWLRQVWKDWPD\
LPSDFWDLUÀRZDFURVVWKHKHDWVLQN
7KHLQYHUWHUZLOOEHJLQWREULHÀ\UHGXFHWKHFRPSUHVVRU
VSHHGZKHQWKHKHDWVLQNWHPSHUDWXUHULVHVDERYH
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E 441 14 ÀDVK ÀDVKHV
,QIRUPD-
WLRQ2QO\
'HDOHU
&RPSUHVVRU
VORZGRZQGXHWRKLJK
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7KHFRPSUHVVRU
VSHHGDXWRPDWLFDOO\
VORZV7KHFRQWURO
VHWVLQGRRU&)0
DQGRXWGRRU530WR
YDOXHVDFFRUGLQJWR
GHPDQGSHUFHQWDJH
UDWKHUWKDQWKH
DFWXDO+]$ODUPLV
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7KLVHUURUFRGHLVSULPDULO\IRULQIRUPDWLRQDOSXUSRVHV
DVWKHLQYHUWHUFRQWUROVWKHFRPSUHVVRUWRRSHUDWHZLWKLQ
GHVLJQSDUDPHWHUV$OHUWFRGHW\SLFDOO\RFFXUVDW
VWDUWXSDVWKHFRPSUHVVRUDVWKHFXUUHQWO\LQFUHDVHVUDSLGO\
GXULQJVWDUWXS
7KHLQYHUWHUZLOOUHGXFHWKHFRPSUHVVRUVSHHGE\K]
DQGVORZWKHFRPSUHVVRUUDPSXSVSHHGWRWKHUHTXHVWHG
FRPSUHVVRUGHPDQGFDSDFLW\7KLVLVQRUPDODQG
H[SHFWHGRSHUDWLRQRIWKHLQYHUWHUWRFRQWUROWKHFRPSUHVVRU
ZLWKLQGHVLJQSDUDPHWHUV,QPRVWFDVHVWKHDOHUWFRGH
GRHVQRWUHTXLUHDQ\DGGLWLRQDOVHUYLFHRUGLDJQRVWLF
SURFHGXUHV
(PD\DOVRRFFXULIWKHV\VWHPLVRSHUDWLQJDWKLJK
SUHVVXUHV
Table 15. Outdoor Control 7-Segment Display Alert Codes - Compressor
3DJH
31-5000949 Rev. 0
Component Testing
CRANKCASE HEATER, CHECKOUT AND STATUS / ERROR CODES
OPERATION:
Crankcase Heater (HR1)
&RPSUHVVRUVLQDOOXQLWVDUHHTXLSSHGZLWKDZDWWEHOO\
EDQGW\SHFUDQNFDVHKHDWHU7KHKHDWHUSUHYHQWVOLTXLGIURP
DFFXPXODWLQJLQWKHFRPSUHVVRU7KHKHDWHULVFRQWUROOHGE\
WKHFUDQNFDVHKHDWHUWKHUPRVWDW
Crankcase Heater Thermostat (S40)
&UDQNFDVH KHDWHU WKHUPRVWDW 6 FRQWUROV WKH FUDQNFDVH
KHDWHULQDOOXQLWVDQGLVORFDWHGRQWKHOLTXLGOLQHVHHFigure
2 DQGFigure 3IRUORFDWLRQV
:KHQ OLTXLG OLQH WHPSHUDWXUH GURSV EHORZ ) WKH
WKHUPRVWDW FORVHV ZKLFK UHVXOWV LQ WKH KHDWHU EHLQJ
HQHUJL]HG
:KHQ OLTXLG OLQH WHPSHUDWXUH ULVHV DERYH ) WKH
WKHUPRVWDW RSHQV ZKLFK UHVXOWV LQ WKH KHDWHU EHLQJ GH
HQHUJL]HG
Figure 37. Belly-Band Crankcase Heater Thermostat
CHECKOUT:
Belly-Band Crankcase Heater: 8VLQJPHWHUVHWRQRKPV
FKHFNFUDQNFDVHKHDWHUUHVLVWDQFH,IUHVLVWDQFHLVRKPV
RULQ¿QLWHUHSODFHWKHFUDQNFDVHKHDWHU
NOTE - &UDQNFDVHKHDWHUWKHUPRVWDWPXVWEHFORVHGDERYH
)&ZKHQFKHFNLQJWKHFUDQNFDVHKHDWHU
Figure 38. Checking Belly-Band Crankcase Heater
Crankcase Heater Thermostat:$VWKHGHWHFWHGWHPSHUDWXUH
FKDQJHVWKHUHVLVWDQFHDFURVVWKHVHQVRUFKDQJHV
STATUS CODE:
1RQH
ERROR CODES:
1RQH
Compressor Sound Cover
$OOXQLWVFRPHZLWKDVRIWVLGHGSRO\HWK\OHQHPROGHGRXWHU
VKHOOFRPSUHVVRUVRXQGFRYHU7KHFRYHUKHOSVUHGXFHDQ\
XQZDQWHGRSHUDWLQJVRXQGVIURPWKHFRPSUHVVRU7KHFRYHU
IHDWXUHVDKRRNORRSFORVXUHV\VWHPIRUHDVHRILQVWDOODWLRQ
RQWKHFRPSUHVVRU
Figure 39. Compressor Sound Cover
Suction Line Filter Drier
7KH XQLWV KDYH D URWDU\ FRPSUHVVRU DQG KDYH D IDFWRU\
LQVWDOOHGVXFWLRQOLQH¿OWHUGULHULQVWDOOHGLQWKHVXFWLRQOLQH
/LTXLGGULHULVQRWUHTXLUHG EXWPD\ EH¿HOG LQVWDOOHG7KH
¿OWHUGULHULVGHVLJQHGWRUHPRYHPRLVWXUHDQGIRUHLJQPDWWHU
ZKLFKFDQOHDGWRFRPSUHVVRUIDLOXUH
Figure 40. 6XFWLRQOLQH¿OWHUGULHU
7KHUPRVWDW
+HDWHU
3DJH
31-5000949 Rev. 0
CHECKOUT:
8VLQJ D PXOWLPHWHU VHW WR RKPV ZLWK WKH WHUPLQDOV
GLVFRQQHFWHGIURPWKHV\VWHPFKHFNWKHUHVLVWDQFHEHWZHHQ
WKHWZRWHUPLQDOVRIWKHWRSFDSVZLWFK,IWKHPHWHUGLVSOD\
JRHVWRLQ¿QLWHWKHVZLWFKLVRSHQ,IWKHPHWHUGLVSOD\JRHV
WR]HURRKPVWKHVZLWFKLVFORVHG
STATUS:
1RQH
ERROR:
Figure 42. Top Cap Thermal Sensor Switch
Component Testing
TOP CAP SWITCH OPERATION, CHECKOUT AND STATUS / ERROR CODES
OPERATION:
Top Cap Thermal Sensor Switch (S173)
6RPH XQLWV DUH HTXLSSHG ZLWK D FRPSUHVVRUPRXQWHG
QRUPDOO\FORVHGWHPSHUDWXUHVZLWFKWKDWSUHYHQWVFRPSUHVVRU
GDPDJHGXHWRRYHUKHDWLQJFDXVHGE\LQWHUQDOIULFWLRQ7KH
VZLWFK LV ORFDWHG RQ WRS RI WKH FRPSUHVVRU FDVLQJ 7KLV
VZLWFK VHQVHV WKH FRPSUHVVRU FDVLQJ WHPSHUDWXUH DQG
RSHQV DW )7KH DXWRUHVHW VZLWFK FORVHV ZKHQ
WKHFRPSUHVVRUFDVLQJWHPSHUDWXUHIDOOVWR)DQG
WKHFRPSUHVVRULVUHHQHUJL]HG7KLVLVDVLQJOHSROHVLQJOH
WKURZ6367ELPHWDOOLFVZLWFK
Figure 41. Top Cap Thermal Sensor Switch
&RPSUHVVRU7RS&DS6ZLWFK
6367%0HWDOLF6ZLWFK
1RUPDOO\RSHQVDW)
DQGFORVHVDW)
6ZLWFK&RYHU
7RSRI&RPSUHVVRU
6
&RPSUHVVRU
7RS&DS6ZLWFK
NOTE - 6\VWHPIDXOWDQGORFNRXWFRGHVWDNHSUHFHGHQFHRYHUV\VWHPVWDWXVFRGHVFRROLQJKHDWLQJRSHUDWLQJSHUFHQWDJHVRUGHIURVW
GHKXPLGL¿FDWLRQ2QO\WKHODWHVWDFWLYHIDXOWRUORFNRXWFRGHVDUHGLVSOD\HGLISUHVHQW,IQRIDXOWRUORFNRXWFRGHVDUHDFWLYHWKHQ
V\VWHPVWDWXVFRGHVDUHGLVSOD\HG
Alert Codes Priority Alarm
Description
Possible Causes and Clearing Alarm
E 422 6HUYLFH6RRQ
&RPSUHVVRU
WRSFDSVZLWFK
H[FHHGLQJ
WKHUPDOOLPLW
7KHWRSRIWKHFRPSUHVVRULVKRW5HIULJHUDQWFKDUJHPD\EHORZRUORZPDVVÀRZ
RIUHIULJHUDQW&KHFN7;9FORJJHG¿OWHUGULHUFRQGHQVHUIDQPRWRULQGRRUEORZHU
PRWRUFRQ¿UPLQGRRUFRLOLVFOHDQ&KHFNWRPDNHVXUHWKHEOXHZLUHVIURPWKH
WRSWKHUPRVWDWGLGQRWJHWSXOOHGRႇRQHRIWKH73WHUPLQDORQWKHRXWGRRUFRQWURO
ERDUG
E 442
6HUYLFH
8UJHQW
7KHWRSFDS
VZLWFKKDV
RSHQHGWLPHV
ZLWKLQRQHKRXU
$VDUHVXOWWKH
RXWGRRUXQLWLV
ORFNHGRXW
:KHQFRPSUHVVRUWKHUPDOSURWHFWLRQVHQVRURSHQVWLPHVZLWKLQKRXURXWGRRU
VWRSVZRUNLQJ
7RFOHDUGLVFRQQHFWSRZHUWRWKHLQGRRUXQLW9$&SRZHUVRXUFHWRWKHRXWGRRU
FRQWUROZKLFKZLOOSRZHURႇWKHRXWGRRUFRQWURODQGZLOORSHQWKHRXWGRRUXQLW
FRQWDFWRUZKLFKLQWHUUXSWVSRZHUWRWKHLQYHUWHUDQGWKHQUHDSSO\SRZHU
Table 16. Outdoor Control 7-Segment Display Alert Codes - Top Cap Switch
3DJH
31-5000949 Rev. 0
Component Testing
REACTOR OPERATIONS, CHECKOUT AND STATUS / ERROR CODES
OPERATION:
5HDFWRU ,QGXFWRU RU FKRNH LV D SDVVLYH WZRWHUPLQDO
HOHFWULFDO FRPSRQHQW WKDW VWRUHV HQHUJ\ LQ LWV PDJQHWLF
¿HOG 5HDFWRUV DUH RQH RI WKH EDVLF FRPSRQHQWV XVHG LQ
HOHFWURQLFVZKHUHFXUUHQWDQGYROWDJHFKDQJHZLWKWLPHGXH
WRWKHDELOLW\RILQGXFWRUV WR GHOD\ DQG UHVKDSH DOWHUQDWLQJ
FXUUHQWV
CHECKOUT:
Main Power ON –9ROWDJH,1 UHDFWRUVKRXOGEHWKHVDPH
DV WKH YROWDJH 287 :LWK PDLQ SRZHU 2)) DQG UHDFWRU
GLVFRQQHFWHGIURPV\VWHPUHVLVWDQFHEHWZHHQOHDGVVKRXOG
EHWKHVDPH
STATUS CODE:
1RQH
ERROR CODES:
1RQH
Figure 43. Reactor
OUTDOOR FAN OPERATION AND CHECKOUT
OPERATION:
7+( XQLWV KDYH D YDULDEOH VSHHG (&0 IDQ PRWRU 7KH
YDULDEOH VSHHG (&0 IDQ PRWRU LV FRQWUROOHG E\ 3:0 IDQ
RXWSXWZKHQWKHFRPSUHVVRULVUXQQLQJDQGZLOOYDU\WKHIDQ
VSHHGWRPDWFKWKHFRPSUHVVRUFDSDFLW\
LOW AMBIENT OPERATION:
7KHXQLWVKDYHIDFWRU\LQVWDOOHGORZDPELHQW FRROLQJPRGH
RSHUDWLRQ WKDW ZLOO FRQWURO WKH FRQGHQVHU IDQ PRWRU EDVHG
XSRQOLTXLGOLQHWHPSHUDWXUH
7KHXQLWVKDYHDYDULDEOHVSHHG(&0IDQPRWRU7KHRXWGRRU
FRQWUROZLOOEHJLQWRPRGXODWHWKHRXWGRRUIDQPRWRUVSHHG
LVEHORZ ) WRPDLQWDLQD OLTXLG OLQHVHQVRU WHPSHUDWXUH
EHWZHHQ)DQG),IWKHOLTXLGOLQHVHQVRUGURSVEHORZ
)WKHFRQWUROZLOOF\FOHWKHIDQRႇXQWLOOLTXLGWHPSHUDWXUH
ULVHVDERYH)
CHECKOUT:
VAC Voltage Check
&KHFN IRU 9$& SRZHU DW LQYHUWHU FRQWDFWRU UHG
ZLUHVVHHFigure 44
:LWKWKHXQLWUXQQLQJFKHFNIRU9$&DWWKHUHGRXWGRRU
IDQPRWRUZLUHVDWWKHFRQWDFWRU,IQRYROWDJHLVSUHVHQW
FKHFNPDLQSRZHUDWWKHFRQWDFWRU
3HUIRUPD'&YROWDJHFKHFNEHWZHHQWKH)3:0DQG)DQ
&WHUPLQDO
8VLQJWKHSXVKEXWWRQRQWKHFRQWUROHQWHUWKH³IDQWHVW
PRGH´LQWKH³¿HOGWHVWPRGH´E\SXVKLQJDQGKROGLQJWKH
EXWWRQXQWLOVROLG³´DSSHDUVUHOHDVHWKHEXWWRQ'LVSOD\
ZLOOVWDUW ÀDVKLQJZLWKLQ VHFRQGV SXVKDQGKROGWKH
EXWWRQ XQWLO WKH ³)´ V\PERO GLVSOD\V WKHQ UHOHDVH WKH
EXWWRQ'LVSOD\ZLOOEHJLQWRÀDVK³)´ZLWKLQVHFRQGV
SXVKDQGKROGWKHEXWWRQXQWLOLWVWRSVÀDVKLQJUHOHDVHWKH
EXWWRQ2XWGRRUIDQPRWRUZLOOF\FOHRQIRUPLQXWHV7R
H[LWSXVKDQGKROGWKHEXWWRQXQWLOWKUHHKRUL]RQWDOEDUV
GLVSOD\5HOHDVHWKHEXWWRQDQGWKHRXWGRRUIDQZLOOF\FOH
Rႇ
9ROWDJH³,1´
9ROWDJH³287´
3DJH
31-5000949 Rev. 0
Component Testing
OUTDOOR FAN OPERATION AND CHECKOUT (Cont.)
2
Supersedes
Litho U.S.A.
C
1
RT13
AMBIENT
SENSOR
U
V
W
B1
COMPRESSOR
S4 HIGH
PRESSURE
SWITCH
TP
HI PS
C
R
O
B4
FAN
K1-2
3
COMPRESSOR
CONTACTOR
S40
HR1
CRANKCASE
THERMOSTAT
CRANKCASE
HEATER
RT36
LIQUID
SENSOR
NOTE-
FOR USE WITH COPPER CONDUCTORS
ONLY. REFER TO UNIT RATING PLATE
FOR MINIMUM CIRCUIT AMPACITY AND
MAXIMUM OVERCURRENT PROTECTION SIZE
REFER TO COMPRESSOR IN UNIT FOR
ACTUAL TERMINAL ARRANGEMENT
COMPRESSOR
CONTACTOR
RED
L2
2
K1-1
i
i
-
+
HEAT PUMP
OUTDOOR UNIT
WARNING-ELECTRIC SHOCK HAZARD
CAN CAUSE INJURY OR DEATH. UNIT
MUST BE GROUNDED IN ACCORDANCE
WITH NATIONAL AND LOCAL CODES
BLACK
BROWN
RED
3
2011
REV
CNTCTR
FAN PWM
COM
Y1
K1
B
A
BROWN
S4
S173
S173
COMPRESSOR TOP
CAP THERMAL SWITCH
R7
RESISTOR
(10K)
RED
BLACK
YELLOW
WHITE
A175
1
OUTDOOR
CONTROL
L1
4
3
1
2
B1
COMPRESSOR
INVERTER
BLUE
RED
YELLOW
2
BLUE
U
V
W
COMM
POWER
BROWN
U
V
W
REACTOR
RED
BLACK
BLUE
WHITE
DIS
AMB
COIL
RT13
RT_SUCTION
SENSOR
RT41
SUCT P
LOW PRESSURE
TRANSDUCER
A168
1234
RT_LIQUID
SENSOR
RT36
SUCT/
LIQ T
LIQ P
HIGH PRESSURE
TRANSDUCER
A188
RT41
SUCTION
SENSOR
RED
WHITE
RT21
L1
B
A
EEV
COIL
24V
T1
240V
COM
EEV
CONTROLLER
VM
B-
A-
B
A
YELLOW
ORANGE
BLUE
BLK
RED
COM
S1
BLUE
COM
24VAC
YEL
R
i-
i+
c
REVERSING
VALVE
R
i-
i+
c
NOTE
-IF ANY WIRE IN THIS APPLIANCE IS REPLACED,IT
MUST BE REPLACED WITH WIRE OF LIKE SIZE,
RATING, INSULATION THICKNESS, AND TERMINATION.
WHITE
WHITE
BLUE
BLUE
BROWN
BLACK
BLACK
BROWN
L45
SOLENOID
GROUND
LUG
K1
COMPRESSOR
CONTACTOR
REACTOR
INVERTER
U
V
W
COM
FAN PWM
O OUT
CNTCTR
HI PS
TP
LO PS
A175
O Out
CNCTR
HI PS
TP
LO PS
EEV
CONTROLLER
T1
TRANSFORMER
RED
BLACK
DENOTES OPTIONAL COMPONENTS
CLASS II VOLTAGE FIELD WIRING
LINE VOLTAGE FIELD INSTALLED
EQUIPMENT
GROUND
RT61
RT61
COMP DISCHARGE
SENSOR
YELLOW
COMP
SUCTION
SENSOR
Figure 44. VAC Voltage Check
Page 75
31-5000949 Rev. 0
Outdoor Fan Motor Servicing
SERVICING FAN WITHOUT REMOVING COMPOSITE TOP
To remove the fan motor assembly without removing the Composite top see steps below:
1. Turn o all power to the outdoor unit low and high
voltage. Remove the Control Panel.
2. Disconnect compressor harness from plug.
3. Remove (4) screws that secure the unit patch plate,
remove patch plate and set to the side.
4. Remove (4) screws that secure the
control panel to the corner posts. Drop
the control panel approximately 2” and
screw the bottom of control panel into the
top holes for the patch plate.
5. Disconnect fan wires from control board,
contactor, and fan ground wire. Slide the
wires through the angled grommet.
6. Remove fan grille screws from the top
panel. Motor/fan can now be serviced.
REINSTALLING FAN MOTOR
Reinstalling Fan Motor
1. Secure fan assembly back into the top panel using
screws that were removed.
2. Route fan wires through the Angle grommet rst.
3. Remove (2) screws from control panel and slide the
control panel up. Slide all grommets and gaskets back
into the top of the control panel. See red boxes above.
4. Once panel is lined up, secure into place Reinstalling
Fan Motor with (4) screws.
5. Attach fan motor wires to contactor,
control board and ground screw. Reattach
compressor harness to the plug.
6. Reinstall patch plate at the bottom.
7. Check all wiring, then turn power back on
and check fan motor operation.
Page 76
31-5000949 Rev. 0
Outdoor Control Operation, Checkout and Status / Error Codes
OPERATION:
The outdoor control is a microprocessor-based device
for use with variable-capacity compressors up to 5-tons
in capacity operating on 24VAC residential power. The
outdoor control integrates the functionality of maintaining
compressor speed, and outdoor fan control of ECM motors.
7KHRXWGRRUFRQWUROLVVHOIFRQ¿JXULQJ'XULQJVWDUWXSWKH
RXWGRRUFRQWUROVHOHFWVRQHRIWZRFRQ¿JXUDWLRQVYDULDEOH
capacity air conditioner or variable-capacity heat pump.
7KHRXWGRRUFRQWUROSURYLGHVDSSOLFDWLRQÀH[LELOLW\7KH
unit may be installed with a conventional 24VAC non-
communicating single or two stage heat pump thermostat.
STATUS CODES:
Rast Terminals for
Thermostat Wiring
Connection
Charge Mode and
Operation Mode
-XPSHU'HWDLO
Push Button
Push
Operation
Mode Jumper
Charge
Mode
Jumper
(CHRG
Mode)
7 Segment
'LVSOD\
Figure 45. Outdoor Control Unit
NOTE - System fault and lockout codes take precedence over system status codes (cooling, heating operating percentages or defrost/
GHKXPLGL¿FDWLRQ2QO\WKHODWHVWDFWLYHIDXOWRUORFNRXWFRGHVDUHGLVSOD\HGLISUHVHQW,IQRIDXOWRUORFNRXWFRGHVDUHDFWLYHWKHQ
system status codes are displayed.
Alert Codes Priority Alarm
Description
Possible Causes and Clearing Alarm
E 600
Service
Urgent
Compressor has
been cycled OFF
on utility load
shedding
/RDGVKHGGLQJIXQFWLRQ3URYLGHVDPHWKRGIRUDORFDOXWLOLW\FRPSDQ\WROLPLW
WKHPD[LPXPSRZHUOHYHOXVDJHRIWKHRXWGRRUXQLW7KHIHDWXUHLVDFWLYDWHGE\
applying 24 volts AC power to the L and C terminals on the outdoor control.
E 601
Service
Urgent
Outdoor unit
has been cycled
OFF on low
temperature
protection.
/RZWHPSHUDWXUH3URWHFWLRQ2XWGRRUXQLWZLOOQRWRSHUDWHZKHQWKHRXWGRRU
WHPSHUDWXUHLVDWRUEHORZ)&,IWKHXQLWLVRSHUDWLQJDQGWKHRXWGRRU
temperature drops below -4°F (-20°C), the unit will continue to operate until the
URRPWKHUPRVWDWLVVDWLV¿HGRUWKHRXWGRRUWHPSHUDWXUHGURSVWR)&
(Outdoor unit ambient sensor provides temperature readings.)
Table 17. Outdoor Control 7-Segment Display Alert Codes - Outdoor Control Status
Page 77
31-5000949 Rev. 0
6\VWHP&RQ¿JXUDWLRQ
THERMOSTAT CONTROL OPTIONS
Conventional 24VAC Non-Communicating Heat Pump
Thermostat Control
The variable capacity unit may be installed using a
conventional 24VAC non-communicating two-stage cooling
or single-stage heat pump thermostat.
NOTE – The conventional 24VAC non-communicating
thermostat must have a compressor minimum on time of
three minutes to prevent compressor short cycling.
The unit will provide full variable capacity operation when
installed with a conventional 24VAC non-communicating
two stage or single-stage heat pump thermostat. The
outdoor control has advanced control algorithms using
the suction pressure sensor in the cooling mode and
liquid pressure sensor in the heating mode to provide true
variable capacity compressor operation.
When utilizing a two-stage conventional 24VAC non-
FRPPXQLFDWLQJKHDWSXPSWKHUPRVWDWVL[ZLUHVDUH
required to control the outdoor unit (R, C, Y1, Y2, O and
:5HIHUWRWKH¿HOGZLULQJGLDJUDPIRUDFRQYHQWLRQDO
24VAC non-communicating 2-stage heat pump thermostat.
COOLING OPERATION MODE JUMPER
The Cooling Operation Mode Jumper is only used on
applications installed with a conventional 24VAC non-
FRPPXQLFDWLQJKHDWSXPSWKHUPRVWDW,QDSSOLFDWLRQV
with a conventional 24VAC non-communicating heat
pump thermostat, the compressor capacity is controlled to
maintain the target suction pressure setpoint. The Cooling
Operation Mode Jumper has three selectable cooling
PRGHV7KHWKUHHPRGHVDUH(ႈFLHQF\-XPSHULQVWDOOHG
on Pins 1 & 2), Normal Mode (Jumper installed on Pins 2
& 3) and Comfort Mode (Jumper Removed). The factory
GHIDXOWSRVLWLRQLVWKH(ႈFLHQF\0RGH7KH(ႈFLHQF\
mode has a variable suction pressure setpoint that will vary
with the outdoor temperature; as the outdoor temperature
increases the suction pressure setpoint will decrease.
When the Cooling Operation Mode jumper is installed in the
“Normal Mode” the suction pressure setpoint is 135 psig.
When the Cooling Operation Mode jumper is installed in
the “Comfort Mode” the suction pressure setpoint is 125
psig.
Thermostat Control Options
Thermostat Type Indoor Unit Type
Qty. of
Wires to
Unit
Terminal Strip
Connections
Unit Operation
Field Wiring
Diagram
Conventional
24VAC 2-Stage
Heat Pump
Thermostat (non-
communicating)
Any Furnace or
Air Handler (non-
communicating or
communicating)
6 R, C, Y1, Y2, O, W
Full Variable Capacity
Operation Controlled by
NS21H Unitary Control
Using Suction Pressure in
Cooling Mode and Liquid
Pressure in Heating Mode
Figure 25
Page 78
31-5000949 Rev. 0
6\VWHP&RQ¿JXUDWLRQ
HEATING OPERATION MODE JUMPER
The Heating Operation Mode Jumper is only used on
applications installed with a conventional 24VAC non-
FRPPXQLFDWLQJKHDWSXPSWKHUPRVWDW,QDSSOLFDWLRQV
with a conventional 24VAC non-communicating heat
pump thermostat, the compressor capacity is controlled to
maintain the target liquid pressure setpoint. The Heating
Operation Mode Jumper has two selectable heating modes.
7KHWZRPRGHVDUH(ႈFLHQF\-XPSHULQVWDOOHGRQ3LQV
& 2) and Comfort Mode (Jumper Removed). The factory
GHIDXOWSRVLWLRQLVWKH(ႈFLHQF\0RGH7KH(ႈFLHQF\
mode has a variable liquid pressure setpoint that will vary
with the outdoor temperature; as the outdoor temperature
decreases, the liquid pressure setpoint will increase. When
the Operation Mode jumper is installed in the “Comfort
Mode” the liquid pressure setpoint is 425 psig.
Figure 46. Operation Mode Jumper
UNIT OPERATION
Unit Operation with a Conventional 24VAC Non-
Communicating 2-Stage Heat Pump Thermostat –
Cooling Mode
When the nit is installed with a conventional 24VAC
non-communicating 2-stage heat pump thermostat, the O
terminal on the thermostat will energize the unit reversing
YDOYHWRSODFHWKHXQLWLQWKHFRROLQJPRGH$<¿UVWVWDJH
FRROLQJGHPDQGZLOOLQLWLDWHFRROLQJRSHUDWLRQDQG¿UVWVWDJH
indoor blower operation. The compressor will be controlled
in the variable capacity mode by varying the compressor
capacity to obtain the target suction pressure set point. The
Y2 second stage cooling demand will initiate second stage
EORZHURSHUDWLRQ,QFUHDVHGDLUYROXPHZLOOLQFUHDVHWKH
load on the indoor coil and increase the suction pressure.
The compressor capacity will continue to be controlled
based upon the suction pressure. The unit capacity will
be controlled in the variable capacity mode throughout
WKHUDQJHRIFDSDFLW\IURPPLQLPXPFDSDFLW\WRPD[LPXP
FDSDFLW\,IWKH<GHPDQGUHPDLQVDIWHUPLQXWHVWKH
control will begin to ramp up the compressor capacity until
PD[LPXPFDSDFLW\LVDFKLHYHG7KHXQLWZLOOF\FOHRႇRQFH
WKHWKHUPRVWDWGHPDQGLVVDWLV¿HG
Unit Operation with a Conventional 24VAC Non-
Communicating 2-Stage Heat Pump Thermostat -
Heating Mode
When the unit is installed with a conventional 24VAC
non-communicating 2-stage heat pump thermostat, O
terminal is not powered during the heating mode and the
reversing valve is de-energized placing hte unit in the
KHDWLQJPRGH$<¿UVWVWDJHFRPSUHVVRUGHPDQGZLOO
LQLWLDWHFRPSUHVVRURSHUDWLRQDQG¿UVWVWDJHLQGRRUEORZHU
operation. The compressor will be controlled in the variable
capacity mode by varying the compressor capacity to
obtain the target liquid pressure set point. The Y2 second
stage compressor demand will initiate second stage blower
RSHUDWLRQ,QFUHDVHGDLUYROXPHZLOOLQFUHDVHKHDWWUDQVIHU
on the indoor coil and degrease the liquid pressure. if
the liquid pressure drops below the target setpoint, the
compressor capacity will be increased. The compressor
capacity will continue to be controlled based upon the
liquid pressure. The unit capacity will be controlled in the
variable capacity mode throughout the range of capacity
IURPPLQLPXPFDSDFLW\WRPD[LPXPFDSDFLW\,IWKH<
demand remains after 20 minutes, the control will begin to
UDPSXSWKHFRPSUHVVRUFDSDFLW\XQWLOPD[LPXPFDSDFLW\
LVDFKLHYHG7KHXQLWZLOOF\FOHRႇRQFHWKHWKHUPRVWDW
GHPDQGLVVDWLV¿HG
Heating Operation Mode Jumper (Conventional
24VAV Thermostats Only)
Operation Mode
Jumper
Jumper Position
Target Suction
Pressure Setting
(ႈFLHQF\GHIDXOW Pin 4 to Pin 25
Variable based on
OAT
Comfort -XPSHU2ႇU 36,*
Page 79
31-5000949 Rev. 0
Emergency 24VAC System Operation
Emergency 24VAC Operation with Conventional 24VAC Thermostat
The variable capacity heat pump Emergency Operation
will operate as single-stage unit at 100% capacity using a
24VAC input. The Emergency Operation is accomplished
by providing (4) 24VAC wires (R, C, Y1 and O) to the heat
pump. The thermostat used for Emergency Operation
requires a single-stage heat pump thermostat.
When Emergency Operation is initiated, the blower air
volume must be checked to verify blower operation at full
air volume during a cooling demand or heat pump demand.
Adjustments to the blower air volume settings can be made
XVLQJWKHLQGRRUEORZHUVSHHG',3VZLWFKHVRUMXPSHUVRQ
the indoor unit iComfort control. The Emergency 24VAC
thermostat operation wiring detail is provided below.
Communicating Air
Handler or
Furnance
24VAC Thermostat
NOTE 1
C
Y
R
O
NOTE 2
Emergency
G
G
Heat
Pump Variable
Capacity Units
Emergency 24VAC Thermostat
Operation (Non-Communicating Mode)
NOTES:
1 - For Emergency 24VAC thermostat
operation, install 24VAC conventional
single stage heat pump thermostat. Wire
the emergency thermostat as shown on
the Emergency 24VAC wiring diagram.
The outdoor unit will operate at 100%
RXWSXWLQWKLVFRQ¿JXUDWLRQ
2 - For Emergency 24 VAC thermostat
operation, make the following outdoor
unit wiring changes. Move the wire on
both indoor and outdoor controls from
terminals i+ to Y1. On heat pumps move
the wire from i- to O on both the indoor
and outdoor control.
Page 80
31-5000949 Rev. 0
Emergency 24VAC System Operation
ERROR CODES:
NOTE - System fault and lockout codes take precedence over system status codes (cooling, heating operating percentages or defrost/
GHKXPLGL¿FDWLRQ2QO\WKHODWHVWDFWLYHIDXOWRUORFNRXWFRGHVDUHGLVSOD\HGLISUHVHQW,IQRIDXOWRUORFNRXWFRGHVDUHDFWLYHWKHQ
system status codes are displayed.
Alert
Codes
Priority Alarm Description Possible Causes and Clearing Alarm
E 105 Service
Soon
The outdoor control has
lost communication with
either the thermostat or
indoor unit.
(TXLSPHQWLVXQDEOHWRFRPPXQLFDWH,QGLFDWHVQXPHURXVPHVVDJHHUURUV,Q
most cases errors are related to electrical noise. Make sure high voltage power is
separated from RS Bus. Check for miswired and/or loose connections between the
stat, indoor unit and outdoor unit. Check for a high voltage source of noise close to
the system. Fault clears after communication is restored.
E 120 Service
Soon
Unresponsive device There is a delay in the system component responding to the system. Typically this
alert code does not cause any operational issues and will clear on its own.
• This alert code is usually caused by a delay in the outdoor unit responding to the
thermostat.
• Leaking voltage from strands within the bundle.
> Land only the R wire on the R terminal to load the bundle with 24VAC.
Ź7\SLFDOO\RQO\WKH5ZLUHQHHGVWREHODQGHGWRLGHQWLI\LIYROWDJHLVOHDNLQJ
Ź,IYROWDJHLVSUHVHQWFKHFNLQJWKHRWKHUZLUHVLVLQIRUPDWLRQDORQO\EXWQRW
needed.
Ź,IYROWDJHLVQRWSUHVHQWFKHFNLQJWKHRWKHUZLUHVRQHDWDWLPHZRXOGEH
needed.
> Check each loose wire in AC mode to C on circuit board.
Ź*RRGYROWDJHLV9$&OHDNLQJYROWDJHLVQRWWKHLVVXH
Ź$FFHSWDEOHFDQEHXSWR9$&ZLWKPRGHUDWHVXFFHVV
Ź6RPHXQLWVKDYHZRUNHGZLWKXSWR9$&ZLWKRFFDVLRQDOVXFFHVV
Ź9ROWDJHRYHU9$&QHHGVWREHDGGUHVVHG
E 124 Service
Urgent
Equipment lost
communicationt
The thermostat has lost communication with a system component for more than
three minutes. System component has lost communication with the thermostat.
• Check the wiring connections between components.
• Ohm wires.
• Cycle power.
• Any component that is miss-wired may cause a false component code to be
shown on system component.
'LVFRQQHFWDOOZLULQJWRRWKHUV\VWHPFRPSRQHQWVDQGFKHFNFRPPXQLFDWLRQRQH
at a time.
NOTE: :KHQXVLQJDÀRDWVZLWFKXVHLVRODWLRQUHOD\WREUHDNFRPPRQZLUHWR
RXWGRRUXQLW)RUWHVWLQJSXUSRVHVUHPRYHÀRDWVZLWFKIURPWKHFLUFXLW
This alert code stops all associated system operations and waits for a heartbeat
message from the system component that is not communicating.
E 125 Service
Urgent
There is a hardware
problem with the outdoor
control.
There is a control hardware problem. Replace the outdoor control if the problem
prevents operation and is persistent. The alarm / fault is cleared 300 seconds after
the fault recovers
E 131 Service
Urgent
The outdoor unit control
parameters are corrupted
5HFRQ¿JXUHWKHV\VWHP5HSODFHWKHFRQWUROLIKHDWLQJRUFRROLQJLVQRWDYDLODEOH
E 132 Service
Urgent
,QWHUQDOVRIWZDUHHUURU Replace outdoor control.
Table 18. Outdoor Control 7-Segment Display Alert Codes - Outdoor Control Errors
Page 81
31-5000949 Rev. 0
Unit Sensor Operation, Checkout and Status /Error Codes
OPERATION:
6-Pin Sensor Harness (DIS, AMB, COIL)
Discharge Sensor (DT61)
The discharge temperature sensor is connected to the
discharge line below the discharge check valve and is
connected to pins 1 and 2. See Figure 48IRUVSHFL¿F
sensor location on discharge line.
Ambient Temperature Sensor (RT13)
Ambient temperatures, as read by the ambient temperature
sensor connected to pin 3 and pin 4, which are below -35°F
(-37°C) or above 120°F (48°C) trigger a fault condition.
,IWKHDPELHQWVHQVRULVRSHQVKRUWHGRURXWRIWKH
temperature range of the sensor, the control displays the
appropriate alert code. Heating and cooling operation is
allowed in this fault condition.
Coil Temperature Sensor (RT21)
The liquid temperature sensor is located on the outlet of the
outdoor EEV and is connected to pins 5 and 6.
Suction Line Sensor (RT41)
Suction line temperature is read by the suction line
temperature sensor between Pins 1 and Pin 2 of the 4-pin
sensor harness. Nominal Resistance of the sensor is 10K
ohms at 77°F. The control will display an E182 error code
if the sensor reads open or shorted for 24 hours. Cooling
operation is allowed with this fault.
Liquid Line Temperature Sensor (RT36)
Liquid line temperature is read by the liquid line
temperature sensor between Pins 3 and Pin 4 of the 4-pin
sensor harness. Nominal Resistance of the sensor is 10K
ohms at 77°F. The control will display are E184 error code
if the sensor reads open or shorted for 24 hours. Cooling
operation is allowed with this fault.
CHECKOUT:
6HQVRUVFRQQHFWWRWKHRXWGRRUFRQWUROWKURXJKD¿HOG
replaceable harness assembly that plugs into the outdoor
control. Through the sensors, the control detects outdoor
ambient, coil and liquid temperature fault conditions. As the
detected temperature changes, the resistance across the
sensor changes. Check sensor operation by reading ohms
across pins shown in Figure 48.
NOTE – When checking the ohms across a sensor, be
aware that a sensor showing a resistance value that is not
within the range shown in Figure 47, may be performing as
designed. However, if a shorted or open circuit is detected,
then the sensor may be faulty and the sensor harness will
need to be replaced.
SENSOR
TEMP RANGE
ºF(ºC)
RESISTANCE VALUES RANGE
(OHMS)
PIN# / WIRE
SLEEVE
COLOR
&2,/
-40 (-40) TO 140
(60)
336,000 to 2,487 (see table 19 on
SDJHIRUH[DFWWHPSHUDWXUHWR
ohm readings)
$1'
(BROWN)
287'225
$0%,(17
-40 (-40) TO 140
(60)
336,000 to 2,487 (see table 19 on
SDJHIRUH[DFWWHPSHUDWXUHWR
ohm readings)
$1'%/$&.
)
',6&+$5*(
40 (-40) TO 140
(60)
336,000 to 2,487 (see table 19 on
SDJHIRUH[DFWWHPSHUDWXUHWR
ohm readings)
$1'
(YELLOW)
Temperature
Sensor Harness
Black wires with
BLACK sleeve
Black wires with
YELLOW sleeve
'LVFKDUJH7HPS
Outdoor Ambient
Coil Temp
Black wires with
BROWN sleeve
Figure 47. 7HPSHUDWXUH6HQVRU6SHFL¿FDWLRQ
4-Pin Suction Temperature Sensor / Liquid Temperature Sensor Harness
Page 82
31-5000949 Rev. 0
4-Pin Suction Temperature Sensor / Liquid Temperature Sensor Harness
CHECKOUT (Cont.) :
Figure 48. Temperature Sensor Locations
Compressor Suction
Temperature
Suction
Temperature
'LVFKDUJH
Temperature
'HIURVW&RLO
Temperature
Sensor
Outdoor Ambient
Temperature Sensor (Below
%RWWRP2I&RQWURO%R[
Compressor Top
Temperature
Liquid Temperature
Sensor Sleeve Color
Coil Temperature Brown
Compressor Suction Temperature White
Suction Temperature White
'LVFKDUJH7HPSHUDWXUH Yellow
Crankcase Heater Thermostat Black
Ambient Temperature Black
Liquid Temperature Blue
Compressor Top Temperature Blue
Prior to startup, ensure each temperature sensor is in the
correct locaon. Ensure thermistors clipped on to piping are not
loose.
Page 83
31-5000949 Rev. 0
CHECKOUT (Cont.) :
Degrees F Resis. Ohms
136.3 2680
133.1 2859
130.1 3040
127.3 3223
124.7 3407
122.1 3592
119.7 3779
117.5 3968
115.3 4159
113.2 4351
111.2 4544
109.3 4740
107.4 4937
105.6 5136
103.9 5336
102.3 5539
100.6 5743
99.1 5949
97.6 6157
96.1 6367
94.7 6578
93.3 6792
92.0 7007
90.6 7225
89.4 7444
88.1 7666
86.9 7890
85.7 8115
84.5 8343
83.4 8573
82.3 8806
81.2 9040
80.1 9277
79.0 9516
78.0 9757
77.0 10001
76.0 10247
75.0 10496
74.1 10747
73.1 11000
72.2 11256
71.3 11515
70.4 11776
69.5 12040
68.6 12306
67.7 12575
Degrees F Resis. Ohms
66.9 12847
66.0 13122
65.2 13400
64.4 13681
63.6 13964
62.8 14251
62.0 14540
56.8 16657
56.0 16973
55.3 17293
54.6 17616
53.9 17942
53.2 18273
52.5 18607
51.9 18945
51.2 19287
50.5 19633
49.9 19982
49.2 20336
48.5 20695
47.9 21057
47.3 21424
46.6 21795
46.0 22171
45.4 22551
44.7 22936
44.1 23326
43.5 23720
42.9 24120
42.3 24525
41.7 24934
41.1 25349
40.5 25769
39.9 26195
39.3 26626
38.7 27063
38.1 27505
37.5 27954
37.0 28408
36.4 28868
35.8 29335
35.2 29808
34.7 30288
34.1 30774
33.5 31267
33.0 31766
Degrees F Resis. Ohms
32.4 32273
29.6 34918
29.1 35471
28.6 36031
28.0 36600
27.5 37177
26.9 37764
26.4 38359
25.8 38963
25.3 39577
21.6 44154
21.0 44851
20.5 45560
20.0 46281
19.4 47014
18.9 47759
18.4 48517
17.8 49289
17.3 50074
16.8 50873
16.3 51686
15.7 52514
15.2 53356
14.7 54215
14.1 55089
13.6 55979
13.1 56887
12.5 57811
12.0 58754
11.5 59715
11.0 60694
10.4 61693
9.9 62712
9.3 63752
8.8 64812
8.3 65895
7.7 67000
7.2 68128
6.7 69281
6.1 70458
5.6 71661
5.0 72890
4.5 74147
3.9 75431
3.4 76745
2.8 78090
Degrees F Resis. Ohms
2.3 79465
1.7 80873
1.2 82314
0.6 83790
0.0 85302
-0.5 86852
-1.1 88440
-1.7 90068
-2.2 91738
-2.8 93452
-3.4 95211
-4.0 97016
-4.6 98870
-5.2 100775
-5.7 102733
-6.3 104746
-6.9 106817
-11.3 123152
-11.9 125787
-12.6 128508
-13.2 131320
-13.9 134227
-14.5 137234
-15.2 140347
-15.9 143571
-16.5 146913
-17.2 150378
-17.9 153974
-18.6 157708
-19.3 161588
-20.1 165624
-20.8 169824
-21.5 174200
-22.3 178762
-23.0 183522
-23.8 188493
-24.6 193691
-25.4 199130
-26.2 204829
-27.0 210805
-27.8 217080
-28.7 223677
-29.5 230621
-30.4 237941
-31.3 245667
-32.2 253834
Degrees F Resis. Ohms
-33.2 262482
-34.1 271655
-35.1 281400
-36.1 291774
-37.1 302840
-38.2 314669
-39.2 327343
Table 19. Coil, Ambient and Liquid Line Sensors Temperature / Resistance Range
4-Pin Suction Temperature Sensor / Liquid Temperature Sensor Harness
Page 84
31-5000949 Rev. 0
CHECKOUT (Cont.) :
Degrees
F
Resis.
Ohms
0 85,407
1 82,739
2 80,163
3 77,677
4 75,276
5 72,957
6 70,718
7 68,555
8 66,466
9 64,447
10 62,497
11 60,613
12 58,791
13 57,031
14 55,329
15 53,684
16 52,093
17 50,555
18 49,067
19 47,628
20 46,236
21 44,890
22 43,587
23 42,327
24 41,107
25 39,926
26 38,783
27 37,677
28 36,606
29 35,569
30 34,565
31 33,592
32 32,650
33 31,738
34 30,855
35 29,999
36 29,170
37 28,366
38 27,588
39 26,833
40 26,101
41 25,392
42 24,705
43 24,038
44 23,392
Degrees
F
Resis.
Ohms
45 22,765
46 22,156
47 21,567
48 20,994
49 20,439
50 19,901
51 19378
52 18871
53 18378
54 17900
55 17437
56 16986
57 16549
58 16124
59 15712
60 15311
61 14923
62 14545
63 14178
64 13821
65 13475
66 13138
67 12811
68 12493
69 12183
70 11883
71 11591
72 11307
73 11031
74 10762
75 10501
76 10247
77 10000
78 9760
79 9526
80 9299
81 9077
82 8862
83 8652
84 8448
85 8250
86 8057
87 7869
88 7685
89 7507
Degrees
F
Resis.
Ohms
90 7334
91 7165
92 7000
93 6840
94 6683
95 6531
96 6383
97 6239
98 6098
99 5961
100 5827
101 5697
102 5570
103 5447
104 5326
105 5209
106 5094
107 4982
108 4873
109 4767
110 4664
111 4563
112 4464
113 4368
114 4274
115 4183
116 4094
117 4007
118 3922
119 3839
120 3758
121 3679
122 3602
123 3527
124 3453
125 3382
26 3312
127 3244
128 3177
129 3112
130 3048
131 2986
132 2925
133 2866
134 2808
Degrees
F
Resis.
Ohms
135 2752
136 2696
137 2642
138 2590
139 2538
140 2488
141 2439
142 2390
143 2343
144 2297
145 2253
146 2209
147 2166
148 2124
149 2083
150 2043
151 2003
152 1965
153 1927
154 1891
155 1855
156 1820
157 1785
158 1752
159 1719
160 1687
161 1655
162 1624
163 1594
164 1565
165 1536
166 1508
167 1480
168 1453
169 1427
170 1401
171 1376
172 1351
173 1327
174 1303
175 1280
176 1257
177 1234
178 1212
179 1191
Degrees
F
Resis.
Ohms
180 1170
181 1149
182 1129
183 1109
184 1090
185 1071
186 1052
187 1034
188 1016
189 999
190 982
191 965
192 948
193 932
194 916
195 901
196 885
197 871
198 856
199 842
200 827
201 814
202 800
203 787
204 774
205 761
206 749
207 736
208 724
209 712
210 701
211 690
212 678
213 667
214 657
215 646
216 636
217 626
218 616
219 606
220 597
221 587
222 578
223 569
224 560
Degrees
F
Resis.
Ohms
225 551
226 543
227 534
228 526
229 518
230 510
231 502
232 495
233 487
234 480
235 473
236 465
237 458
238 452
239 445
240 438
241 432
242 425
243 419
244 413
245 407
246 401
247 395
248 389
249 384
250 378
Discharge Line Sensor Temperature Resistance Table
4-Pin Suction Temperature Sensor / Liquid Temperature Sensor Harness
Page 85
31-5000949 Rev. 0
CHECKOUT (Cont.) :
Table 20. Outdoor Control 7-Segment Display Alert Codes – Outdoor Control Errors
4-Pin Suction Temperature Sensor / Liquid Temperature Sensor Harness
NOTE - System fault and lockout codes take precedence over system status codes (cooling, heating operating percentages or defrost/
GHKXPLGL¿FDWLRQ2QO\WKHODWHVWDFWLYHIDXOWRUORFNRXWFRGHVDUHGLVSOD\HGLISUHVHQW,IQRIDXOWRUORFNRXWFRGHVDUHDFWLYHWKHQ
system status codes are displayed.
Alert Codes Priority Alarm Description Possible Causes and Clearing Alarm
E 182 Service Soon
Suction Temperature Sensor
has malfunctioned
Sensor is open or shorted. Replace the Sensor.
E 183 Service Soon
Liquid Pressure Transducer
Fault
Liquid pressure transducer is out of range. The signal should be
EHWZHHQ9'&DQG9'&EHWZHHQ%OXHDQG%ODFN7KH
error code will be cleared when the proper signal is provided.
Systems controlled by a conventional 24VAC heat pump
thermostat will operate in stage mode.
E 184 Service Soon Faulty outdoor liquid line sensor Sensor is open or shorted. Replace the sensor.
E 186 Service Soon 'LVFKDUJHWHPSHUDWXUHWRRORZ
'LVFKDUJHWHPSHUDWXUHUHDGLQJWRRORZ+HDWSXPSKHDWLQJ
operation can continue. Check discharge temperature sensor
location and verify the sensor is secure on the discharge line.
E 187 Service Soon /
Service Critical
'LVFKDUJHWHPSHUDWXUH
pressure too high
'LVFKDUJHWHPSHUDWXUHRUSUHVVXUHUDWLRH[FHHGHGXSSHUOLPLW
Heat pump heating stopped.
Figure 49.
Heat Pump
Heating Demand
Monitor Compressor
Discharge Line
Temperature
Monitor Compression Ratio
(Liquid Pressure + 45/Absolute
SP)
Unitary Control Cycles
Compressor Off & Displays E187
Discharge Line
Temperature Above
220°F
Compression Ratio Greater than
15
Unitary Control will Begin to
Reduce Compressor Speed by
5 hz/min Until Discharge
Temperature Reaches 200°F
or Compressor Reaches Min.
Speed
Unitary Control will Begin to
Reduce Compressor Speed by
5 hz/min Until Compression
Ratio Reaches 9.5 or
minimum Compressor Speed
Compressor Discharge Line
Temperature Above 220°F &
Compressor at Minimum
Speed
Compression Ratio Above 10.0
& Compressor at Minimum
Speed
E187 Error Clears when DT/PR
Drops Below Lower Level Unit
Resumes Normal Operation
DT/PR Protection Loop
Discharge Temperature
Protection
Page 86
31-5000949 Rev. 0
DC Inverter Control Operation, Checkout, Status / Error Codes
OPERATION OF COMPONENTS:
(OHFWURPDJQHWLFFRPSDWLELOLW\FLUFXLW(0&(0&HQVXUHVWKHFRUUHFWRSHUDWLRQRIGLႇHUHQWHTXLSPHQWLWHPVZKLFKXVHRU
UHVSRQGWRHOHFWURPDJQHWLFSKHQRPHQD,WDOVRKHOSVWRQHJDWHWKHHႇHFWVRILQWHUIHUHQFH
CONVERTER
&RQYHUWV$&DOWHUQDWLQJFXUUHQWWR'&GLUHFWFXUUHQW
POWER FACTOR CORRECTION (PFC) CIRCUIT:
7KH3)&PRGXOHLVDQLQWHJUDWHGSDUWRIWKHRXWGRRULQYHUWHUWKDWPRQLWRUVWKH'&EXVIRUKLJKORZDQGDEQRUPDOYROWDJH
FRQGLWLRQV,IDQ\RIWKHVHFRQGLWLRQVDUHGHWHFWHGWKH3)&IXQFWLRQDQGFRPSUHVVRUZLOOVWRS
INTELLIGENT (INVERTER) POWER MODULE (IPM):
7KH,30FRQYHUWV'&SRZHULQWR$&SRZHU7KHFRQWUROPHWKRGLVNQRZQDVSXOVHZLGWKPRGXODWLRQ3:07KLV
PHDQVWKH'&LVVZLWFKHGRQDQGRႇYHU\TXLFNO\FKRSSHGE\WKHWUDQVLVWRUVZLWFKHVWRPDNHVLPXODWHG$&DWUHTXLUHG
frequency and voltage.
COMMUNICATION CONTROL CIRCUIT:
Receives and sends message between the inverter and the outdoor control.
STATUS CODES:
Table 21. Outdoor Control 7-Segment Display Alert Codes and Inverter LED Flash Codes
NOTE - System fault and lockout codes take precedence over system status codes (cooling, heating operating percentages or defrost/
GHKXPLGL¿FDWLRQ2QO\WKHODWHVWDFWLYHIDXOWRUORFNRXWFRGHVDUHGLVSOD\HGLISUHVHQW,IQRIDXOWRUORFNRXWFRGHVDUHDFWLYHWKHQ
system status codes are displayed.
Alert Codes
Inverter LED Flash Code
QXPEHURIÀDVKHV
Priority Alarm Description Possible Causes and Clearing Alarm
Red LED Green LED
N/A ON OFF N/A 16+16+RQO\,QGLFDWHVLQYHUWHULVRSHUDWLQJQRUPDOO\
N/A ON ON N/A 16+16+RQO\,QGLFDWHVLQYHUWHULVRSHUDWLQJQRUPDOO\
N/A OFF OFF N/A ,QGLFDWHVLQYHUWHULV127HQHUJL]HG
Page 87
31-5000949 Rev. 0
DC Inverter Control Operation, Checkout, Status / Error Codes
ERROR CODES:
Table 22. Outdoor Control 7-Segment Display Alert Codes and Inverter LED Flash Codes
NOTE -6\VWHPIDXOWDQGORFNRXWFRGHVWDNHSUHFHGHQFHRYHUV\VWHPVWDWXVFRGHVFRROLQJKHDWLQJRSHUDWLQJSHUFHQWDJHVRUGHIURVWGHKXPLGL¿FDWLRQ
2QO\WKHODWHVWDFWLYHIDXOWRUORFNRXWFRGHVDUHGLVSOD\HGLISUHVHQW,IQRIDXOWRUORFNRXWFRGHVDUHDFWLYHWKHQV\VWHPVWDWXVFRGHVDUHGLVSOD\HG
Alert
Codes
Inverter
Code
Inverter LED Flash
Code (number of
ÀDVKHV
Priority Alarm Description Possible Causes and Clearing Alarm
Red LED Green LED
E 423 40 ÀDVKHV OFF
Service Soon
/ Service
Urgent
The inverter has detected a
circuit problem.
Control will lock out after 10 strikes within an
hour.
To clear, disconnect power to the indoor unit
(24VAC power source to the outdoor control)
ZKLFKZLOOSRZHURႇWKHRXWGRRUFRQWURODQGZLOO
open the outdoor unit contactor, which interrupts
power to the inverter and then re-apply power.
E 427 21 ÀDVKHV ÀDVK
Service Soon
/ Service
Urgent
7KHLQYHUWHUKDVGHWHFWHGD'&
peak fault condition.
,IFRQGLWLRQ$RUKLJKHULVGHWHFWHGRXWGRRU
unit will stop (compressor and fan). Antishort
F\FOHLVLQLWLDWHG,ISHDNFXUUHQW$RUKLJKHU
occurs 10 times within an hour, system will lock
out.
,QGLFDWHVKLJKSUHVVXUHFRQGHQVHUIDQIDLOXUH
locked compressor rotor or overcharge. To clear,
disconnect power to the indoor unit (24VAC
power source to the outdoor control) which will
SRZHURႇWKHRXWGRRUFRQWURODQGZLOORSHQWKH
outdoor unit contactor, which interrupts power to
the inverter and then re-apply power.
E 428 22 ÀDVKHV ÀDVKHV
Service Soon
/ Service
Urgent
The inverter has detected a high
main input current condition
,IFRQGLWLRQLVGHWHFWHGRXWGRRUXQLWZLOOVWRS
(compressor and fan). Antishort cycle is initiated.
,IFRQGLWLRQRFFXUVWLPHVZLWKLQDQKRXUWKH
Unitary Control will cycle the contactor to prevent
the unit from locking out.
,QGLFDWHVKLJKSUHVVXUHFRQGHQVHUIDQIDLOXUH
or overcharge. To clear, disconnect power to the
indoor unit (24VAC power source to the outdoor
FRQWUROZKLFKZLOOSRZHURႇWKHRXWGRRUFRQWURO
and will open the outdoor unit contactor, which
interrupts power to the inverter and then re-apply
power.
E 429 23 ÀDVKHV ÀDVKHV
Service Soon
/ Service
Urgent
On a call for compressor
RSHUDWLRQLI'&OLQNSRZHULQ
inverter does not rise above
9'&IRUDQGWRQ
PRGHOV9'&IRUDQG
ton models, within 30 seconds,
the control will display a
VHUYLFHVRRQFRGH,IFRQGLWLRQ
is detected, outdoor unit will
stop (Compressor and fan).
$QWLVKRUWF\FOHVLVLQLWLDWHG,I
condition occurs 10 times within
a 60 minute rolling time period,
system will lock out and display
a service urgent code.
Issues:
,I'&OLQNSRZHULQLQYHUWHUGRHVQRWULVH
DERYH9'&IRUDQGWRQPRGHOV
9'&IRUDQGWRQPRGHOVZLWKLQ
seconds, the outdoor control will display a
service soon code.
(2) Capacitors on inverter do not properly
charge.
Corrective Actions:
(1) Check for proper main power to outdoor unit
and for any loose electrical connections.
E 430 26 ÀDVKHV ÀDVKHV
Service Soon
/ Service
Urgent
Compressor start failure.
,IFRQGLWLRQLVGHWHFWHGRXWGRRUXQLWZLOOVWRS
(compressor and fan). Antishort cycle is initiated.
,IFRQGLWLRQRFFXUVWLPHVZLWKLQDQKRXU
V\VWHPZLOOORFNRXW,QGLFDWHVSRRUFRQQHFWLRQ
at compressor harness, improper winding
UHVLVWDQFHORFNHGFRPSUHVVRUURWRURUÀRRGHG
compressor. To clear, disconnect power to the
indoor unit (24VAC power source to the outdoor
FRQWUROZKLFKZLOOSRZHURႇWKHRXWGRRUFRQWURO
and will open the outdoor unit contactor, which
interrupts power to the inverter and then re-apply
power.
Page 88
31-5000949 Rev. 0
DC Inverter Control Operation, Checkout, Status / Error Codes
ERROR CODES (Cont.):
NOTE -6\VWHPIDXOWDQGORFNRXWFRGHVWDNHSUHFHGHQFHRYHUV\VWHPVWDWXVFRGHVFRROLQJKHDWLQJRSHUDWLQJSHUFHQWDJHVRUGHIURVWGHKXPLGL¿FDWLRQ
2QO\WKHODWHVWDFWLYHIDXOWRUORFNRXWFRGHVDUHGLVSOD\HGLISUHVHQW,IQRIDXOWRUORFNRXWFRGHVDUHDFWLYHWKHQV\VWHPVWDWXVFRGHVDUHGLVSOD\HG
Alert
Codes
Inverter
Code
Inverter LED Flash
Code (number of
ÀDVKHV
Priority Alarm Description Possible Causes and Clearing Alarm
Red LED Green LED
E 431 27 ÀDVKHV ÀDVKHV
Service Soon
/ Service
Urgent
Error occurs when PFC detects
an over-current condition of
100A, the control will display a
VHUYLFHVRRQFRGH,IFRQGLWLRQ
is detected, outdoor unit will
stop (Compressor and fan).
Anti-short cycle is initiated.
,QYHUWHULVXQDYDLODEOHWR
communicate with the outdoor
FRQWUROIRUPLQXWHV,I
condition occurs 10 times within
a 60 minute rolling time period,
system will lock out and display
a service urgent code.
Issues:
,QGLFDWHVSRZHULQWHUUXSWLRQEURZQRXWSRRU
electrical connection or loose inverter input
wire.
(2) System testing was set up and code was
generated when the reversing valve is
de-energized coming out of defrost (code
appears with or without 30 compressor
delay).
Corrective Actions:
(1) Check for proper main power to outdoor unit
and for any loose electrical connections.
E 432 28 ÀDVKHV ÀDVKHV
Service Soon
/ Service
Urgent
7KHLQYHUWHUKDVGHWHFWHGD'&
link high voltage condition.
(UURURFFXUVZKHQWKH'&OLQNFDSDFLWRUYROWDJH
LVJUHDWHUWKDQ9'&,IFRQGLWLRQLVGHWHFWHG
outdoor unit will stop (compressor and fan).
$QWLVKRUWF\FOHLVLQLWLDWHG,IFRQGLWLRQRFFXUV
10 times within an hour, system will lock out.
System will stop. To clear, disconnect power
to the indoor unit (24VAC power source to the
RXWGRRUFRQWUROZKLFKZLOOSRZHURႇWKHRXWGRRU
control and will open the outdoor unit contactor,
which interrupts power to the inverter and then
re-apply power.
E 433 29 ÀDVKHV ÀDVKHV
Service Soon
/ Service
Urgent
The inverter has detected
a compressor overcurrent
condition
Error occurs when compressor peak phase
FXUUHQWLVJUHDWHUWKDQ$,QYHUWHUZLOOLVVXH
FRGH¿UVWDQGVORZGRZQWRWU\WRUHGXFHWKH
FXUUHQW,IWKHFXUUHQWUHPDLQVKLJKRXWGRRUXQLW
will stop (compressor and fan). Antishort cycle
LVLQLWLDWHG,IFRQGLWLRQRFFXUVWLPHVZLWKLQDQ
hour, the Unitary Control will cycle the contactor
to prevent the unit from locking out.
To clear, disconnect power to the indoor unit
(24VAC power source to the outdoor control)
ZKLFKZLOOSRZHURႇWKHRXWGRRUFRQWURODQGZLOO
open the outdoor unit contactor, which interrupts
power to the inverter and then re-apply power.
E 434 53 ÀDVKHV ÀDVKHV
Service Soon
/ Service
Urgent
Outdoor control has lost
communications with the
inverter for greater than 3
minutes.
Outdoor unit will stop all
compressor demand. Outdoor
control will attempt to establish
communication multiple times
and will automatically clear
when the error clears. Unit
will lock out after 60 minutes
if communication is not
established and will display a
service urgent error code.
Issues:
2XWGRRUGLVFRQQHFWLVRႇRURXWGRRUSRZHU
LVRႇZKHQLQGRRUSRZHULVRQVRXUFHIRU
24VAC)
(2) Loose electrical power connections
,QWHUUXSWLRQRIPDLQSRZHUWRWKHLQYHUWHU
4) Generator powers indoor unit, but not the
outdoor unit.
Corrective Actions:
7RUHVHWF\FOHWKHLQGRRUSRZHURႇVRXUFHRI
24VAC to outdoor unit) and back on. This will
de-energize outdoor control and inverter by
cycling the contactor.
(2) Make sure the disconnect is on
(3) Check electrical power supply connections
(4) Check for proper main 230V power supply
Table 22. Segment Display Alert Codes and Inverter LED Flash Codes
Page 89
31-5000949 Rev. 0
DC Inverter Control Operation, Checkout, Status / Error Codes
NOTE -6\VWHPIDXOWDQGORFNRXWFRGHVWDNHSUHFHGHQFHRYHUV\VWHPVWDWXVFRGHVFRROLQJKHDWLQJRSHUDWLQJSHUFHQWDJHVRUGHIURVWGHKXPLGL¿FDWLRQ
2QO\WKHODWHVWDFWLYHIDXOWRUORFNRXWFRGHVDUHGLVSOD\HGLISUHVHQW,IQRIDXOWRUORFNRXWFRGHVDUHDFWLYHWKHQV\VWHPVWDWXVFRGHVDUHGLVSOD\HG
Alert
Codes
Inverter
Code
Inverter LED Flash
Code (number of
ÀDVKHV
Priority Alarm Description Possible Causes and Clearing Alarm
Red LED Green LED
E 435 60 ÀDVKHV OFF
Service Soon
/ Service
Urgent
,QYHUWHULQWHUQDOHUURU
When this error occurs, the outdoor control
will cycle power to the inverter by opening
the contactor for 2 minutes. Check that the
EEPROM is properly seated. After power is
cycled to the inverter 3 times, the outdoor unit is
locked out.
E 436 62 ÀDVKHV ÀDVKHV
Service Soon
/ Service
Urgent
,QYHUWHUKHDWVLQNWHPSHUDWXUH
H[FHHGHGOLPLW2FFXUVZKHQ
the heat sink temperature
H[FHHGVWKHLQYHUWHUOLPLW
,QYHUWHULVVXHVFRGH¿UVW
then slows down to allow the
KHDWVLQNWRFRRO,IWHPSHUDWXUH
remains high, outdoor unit stops
(compressor and fan). Anti-short
F\FOHLVLQLWLDWHG,IFRQGLWLRQ
occurs 5 times within an hour,
the Unitary Control will cycle
the contactor to prevent the
unit from locking out. To clear,
disconnect power to the indoor
unit (24VAC power source to
the outdoor control) which will
SRZHURႇWKHRXWGRRUFRQWURO
and will open the outdoor unit
contactor, which interrupts
power to the inverter and then
re-apply power.
7KHLQYHUWHU¿QQHGDOXPLQXPKHDWVLQNLVORFDWHG
on the back side of the inverter in the condenser
DLUVWUHDP,IWKLVDOHUWFRGHRFFXUVIUHTXHQWO\
especially at lower outdoor temperatures, check
the heat sink for debris that may reduce heat
transfer or possible obstructions that may impact
DLUÀRZDFURVVWKHKHDWVLQN$OHUWFRGH
may also occur if the unit is operating at high
pressures.
E 437 65 ÀDVKHV ÀDVKHV
Service Soon
/ Service
Urgent
Heat sink temperature sensor
fault has occurred (temperature
less than 4 ºF or greater than
264ºF after 10 minutes of
operation).
This occurs when the temperature sensor
detects a temperature less than 0.4ºF or greater
WKDQ)DIWHUPLQXWHVRIRSHUDWLRQ,I
condition is detected, outdoor unit will stop
(compressor and fan). Antishort cycle is initiated.
,IFRQGLWLRQRFFXUVWLPHVZLWKLQDQKRXUV\VWHP
will lock out. To clear, disconnect power to the
indoor unit (24VAC power source to the outdoor
FRQWUROZKLFKZLOOSRZHURႇWKHRXWGRRUFRQWURO
and will open the outdoor unit contactor, which
interrupts power to the inverter and then re-apply
power.
Table 22. Segment Display Alert Codes and Inverter LED Flash Codes
ERROR CODES (Cont.):
Page 90
31-5000949 Rev. 0
DC Inverter Control Operation, Checkout, Status / Error Codes
ERROR CODES (Cont.):
Table 22. Segment Display Alert Codes and Inverter LED Flash Codes
NOTE -6\VWHPIDXOWDQGORFNRXWFRGHVWDNHSUHFHGHQFHRYHUV\VWHPVWDWXVFRGHVFRROLQJKHDWLQJRSHUDWLQJSHUFHQWDJHVRUGHIURVWGHKXPLGL¿FDWLRQ
2QO\WKHODWHVWDFWLYHIDXOWRUORFNRXWFRGHVDUHGLVSOD\HGLISUHVHQW,IQRIDXOWRUORFNRXWFRGHVDUHDFWLYHWKHQV\VWHPVWDWXVFRGHVDUHGLVSOD\HG
Alert
Codes
Inverter
Code
Inverter LED Flash
Code (number of
ÀDVKHV
Priority Alarm Description Possible Causes and Clearing Alarm
Red LED Green LED
E 438 73 ÀDVKHV ÀDVKHV
Service Soon
/ Service
Urgent
The inverter has detected a
PFC over current condition.
This would be caused by a high
load condition, high pressure,
or outdoor fan failure. Outdoor
control will display the code
when the inverter has the error.
After 3 minutes, the inverter
will reset and the compressor
ZLOOWXUQRQDJDLQ,ILWKDSSHQV
10 times within a 60 minute
UROOLQJWLPHSHULRGWKH2'
control will lock out operation of
the outdoor unit and display a
service urgent code.
Issue:
Possible issue is system running at high
pressures. Check for high pressure trips or other
alert codes in room thermostat and outdoor
control.
To clear, disconnect power to the indoor unit
(24VAC power source to the outdoor control)
ZKLFKZLOOSRZHURႇWKHRXWGRRUFRQWURODQGZLOO
open the outdoor unit contactor, which interrupts
power to the inverter and then re-apply power.
E 439 12 ÀDVK ÀDVKHV
,QIRUPDWLRQ
2QO\'HDOHU
Compressor slowdown due to
high input current.
This error code is primarily for informational
purposes as the inverter controls the compressor
to operate within design parameters. Typically
the inverter will make a minor speed reduction
RI+]DSSUR[LPDWHO\DVSHHGUHGXFWLRQ
for a brief period of time and to reduce the input
current and will then resume normal operation.
E 440 13 ÀDVK ÀDVKHV
,QIRUPDWLRQ
2QO\'HDOHU
Heat sink temperature
is approaching limit. The
compressor speed automatically
slows to reduce heat sink
temperature. The control
sets indoor CFM and outdoor
RPM to values according to
demand percentage rather
than the actual Hz. Alarm is
automatically cleared.
This error code is primarily for informational
purposes as the inverter controls the compressor
speed to operate within design parameters.
Typically the inverter will make a minor speed
UHGXFWLRQRI+]DSSUR[LPDWHO\DVSHHG
reduction) for a brief period of time and to
reduce the heat sink temperature and will then
resume normal operation. This may occur at high
outdoor temperatures (above 110ºF) for brief
periods of time (3 – 4 minutes) and is normal
DQGH[SHFWHGRSHUDWLRQRIWKHLQYHUWHUFRQWUROOLQJ
the compressor safely within design parameters.
7KHLQYHUWHU¿QQHGDOXPLQXPKHDWVLQNLVORFDWHG
on the back side of the inverter in the condenser
DLUVWUHDP,IKHDOHUWFRGHRFFXUVIUHTXHQWO\
especially at lower outdoor temperatures, check
the heat sink for debris that may reduce heat
transfer or possible obstructions that may impact
DLUÀRZDFURVVWKHKHDWVLQN
7KHLQYHUWHUZLOOEHJLQWREULHÀ\UHGXFH
the compressor speed when the heat sink
temperature rises above 167ºF and will allow the
inverter to resume the requested compressor
demand speed once the inverter heat sink
reaches 150ºF.
Page 91
31-5000949 Rev. 0
System Refrigerant
DC Inverter Control Operation, Checkout, Status / Error Codes
Table 22. Segment Display Alert Codes and Inverter LED Flash Codes
ERROR CODES (Cont.):
NOTE -6\VWHPIDXOWDQGORFNRXWFRGHVWDNHSUHFHGHQFHRYHUV\VWHPVWDWXVFRGHVFRROLQJKHDWLQJRSHUDWLQJSHUFHQWDJHVRUGHIURVWGHKXPLGL¿FDWLRQ
2QO\WKHODWHVWDFWLYHIDXOWRUORFNRXWFRGHVDUHGLVSOD\HGLISUHVHQW,IQRIDXOWRUORFNRXWFRGHVDUHDFWLYHWKHQV\VWHPVWDWXVFRGHVDUHGLVSOD\HG
Alert
Codes
Inverter
Code
Inverter LED Flash
Code (number of
ÀDVKHV
Priority Alarm Description Possible Causes and Clearing Alarm
Red LED Green LED
E 441 14 ÀDVK ÀDVKHV
,QIRUPDWLRQ
2QO\'HDOHU
Compressor slowdown
due to high compressor
current. Compressor
current is approaching limit.
The compressor speed
automatically slows. The control
sets indoor CFM and outdoor
RPM to values according to
demand percentage rather
than the actual Hz. Alarm is
automatically cleared.
This error code is primarily for informational
purposes as the inverter controls the compressor
to operate within design parameters. Alert code
441 typically occurs at startup as the compressor
as the currently increases rapidly during startup.
The inverter will reduce the compressor speed
by 4 hz and slow the compressor ramp up speed
to the requested compressor demand (capacity).
7KLVLVQRUPDODQGH[SHFWHGRSHUDWLRQRIWKH
inverter to control the compressor within design
SDUDPHWHUV,QPRVWFDVHVWKHDOHUWFRGH
does not require any additional service or
diagnostic procedures.
E441 may also occur if the system is operating
at high pressures.
This error code is primarily for informational
purposes as the inverter controls the compressor
to operate within design parameters. Alert code
441 typically occurs at startup as the compressor
as the currently increases rapidly during startup.
The inverter will reduce the compressor speed
by 4 hz and slow the compressor ramp up speed
to the requested compressor demand (capacity).
7KLVLVQRUPDODQGH[SHFWHGRSHUDWLRQRIWKH
inverter to control the compressor within design
SDUDPHWHUV,QPRVWFDVHVWKHDOHUWFRGH
does not require any additional service or
diagnostic procedures.
E441 may also occur if the system is operating
at high pressures.
IMPORTANT
The system must be operating at full
capacity during charging. Using the Charge Mode Jumper
on the outdoor control ensures the unit is running at 100%
FDSDFLW\&RQ¿UPRXWGRRUXQLWUXQQLQJFDSDFLW\
7KLVVHFWLRQRXWOLQHVWKHSURFHGXUHVWR
1. Connect a gauge set for testing and charging as
illustrated in Figure 50.
&KHFNDQGDGMXVWLQGRRUDLUÀRZDVGHVFULEHGLQ
Figure 52.
3. Add or remove refrigerant using the weigh-in method
shown in Figure 53.
4. Verify the charge using the subcooling method described
in Figure 54.
IMPORTANT: Unit must be operating at 100% capacity to
be charged properly.
Adding or Removing Refrigerant
This system uses R454B refrigerant which operates at
much higher pressures than HFC-410A.
,QGRRU$LUÀRZ&KHFN
&KHFNDLUÀRZXVLQJWKH'HOWD7'7SURFHVVXVLQJWKH
illustration in Figure 52.
Page 92
31-5000949 Rev. 0
Charge Mode Jumper
To initiate the Charge Mode function, install the jumper
DFURVVWKHWZR&KDUJH0RGH3LQV&+5*02'(RQ
the outdoor control. The Charge Mode can be used
when charging the system with refrigerant, checking
the refrigerant charge, pumping down the system and
performing other service procedures that requires outdoor
unit operation at 100% capacity.
Charge Mode Operation with a Conventional 24VAC
Non-Communicating Heat Pump Thermostat
On applications with a conventional 24VAC non-
communicating thermostat, the charge mode jumper must
be installed on the Charge Mode Pins after providing
a Y1 compressor demand to the NS21H to initiate the
Charge Mode. When using the Charge Mode in the cooling
mode,the “O” must also be provided with a 24V signal to
SODFHWKHUHYHUVLQJYDOYHLQWKHFRROSRVLWLRQ,QWKHKHDWLQJ
mode only a Y1 compressor demand is required along with
the blower demand for the full cooling air volume. A cooling
blower demand must also be provided to initiate blower
operation on the cooling speed on the indoor unit. The
compressor and outdoor fan motor will operate at 100%
FDSDFLW\7RH[LWWKHFKDUJLQJPRGHUHPRYHWKH&KDUJH
Mode Jumper and remove the Y1 Cooling demand and
LQGRRUEORZHUGHPDQG7KH&KDUJH0RGHKDVDPD[LPXP
WLPHRIPLQXWHVDQGZLOODXWRPDWLFDOO\H[LWWKHFKDUJH
mode after 60 minutes is the charge mode jumper is left in
place.
TO LIQUID
LINE SERVICE
PORT
TEMPERATURE
SENSOR
DIGITAL SCALE
REFRIGERANT TANK
TEMPERATURE SENSOR
(LIQUID LINE)
MANIFOLD GAUGE SET
A. CLOSE MANIFOLD GAUGE SET VALVES AND CONNECT THE CENTER HOSE TO A CYLINDER OF HFC-410A SET FOR LIQUID PHASE CHARGING.
B. CONNECT THE MANIFOLD GAUGE SET'S LOW PRESSURE SIDE TO THE SUCTION LINE SERVICE PORT.
C. CONNECT THE MANIFOLD GAUGE SET'S HIGH PRESSURE SIDE TO THE LIQUID LINE SERVICE PORT.
D. POSITION TEMPERATURE SENSOR ON LIQUID LINE NEAR LIQUID LINE SERVICE PORT.
OUTDOOR UNIT
CHARGE IN
LIQUID PHASE
CONNECTIONS FOR TESTING AND CHARGING
GAUGE SET
A
C
D
LOW
HIGH
B
SUCTION LINE
Figure 50. Gauge Set Connections
Page 93
31-5000949 Rev. 0
Charge Mode Jumper
Verify the unit is electrically grounded before charging
WKHV\VWHP([WUHPHFDUHVKDOOEHWDNHQQRWWRRYHU¿OOWKH
refrigerating system.
Charge should be checked and adjusted using information
outlined in this section and in the tables provided on the
charging label on the unit’s control access panel.
R-454B is a zeotropic blend of two refrigerants. At any
given refrigerant pressure, R-454B will have two saturation
temperatures, a saturated liquid temperature and a
saturated vapor temperature. See R-454B Refrigerant
Pressure Temperature Chart in the installation and service
manual for saturation temperatures.
R-454B units must be charged with liquid refrigerant.
Follow conventional charging procedures when charging
the system. The technician is required to mark the total
charge of the installed system on the unit nameplate,
which includes the nameplate charge (factory charge) and
additional charge that is added to the system at the time of
installation.
The R-454B refrigerant cylinders are provided with a ¼” LH
ÀDUHFRQQHFWLRQWKHUHIRUHDó´/+IHPDOHÀDUHDGDSWHUZLOO
be required. Connect manifold gauges and hoses following
conventional charging procedures. Position the R-454B
refrigerant cylinder to deliver liquid refrigerant.
The unit is factory-charged with R454B. Refer to unit
charging label for baseline line set length for factory unit
charge and additional charge guidelines. For line lengths
over baseline line set length, add 3 oz of refrigerant for
every 5 feet of piping beyond baseline charge.
,QLWLDWHDFDOOIRUFRROLQJDQGDOORZWKHUHIULJHUDQWSUHVVXUHV
and temperatures to stabilize. Adjust the charge to using
the subcooling method. The unit charging label provides
the target Subcooling Values. Record the liquid line
temperature. Measure the liquid line pressure and use
the value to determine the Saturated Liquid Temperature.
Calculate subcooling by subtracting the liquid line
temperature from the Saturated liquid temperature.
Subcooling = Saturated Liquid Temperature – Liquid Line
Temperature
Compare the results with the unit charging label.
Once system charging has been completed, the additional
charge and total charge must be marked on the unit
nameplate. Total Charge = Factory Charge + Additional
charge. The total charge is marked on the space adjacent
to “Total Charge”. See nameplate below.
Additional Charge added to bring system to full
charge (Line Set Length / Coil matches)
Total System Charge (Factory
Charge + Additional Charge)
Figure 51. Charging Label
Page 94
31-5000949 Rev. 0
Charge Mode Jumper
Figure 52. &KHFNLQJ,QGRRU$LUÀRZRYHU(YDSRUDWRU&RLOXVLQJ'HOWD7&KDUW
Figure 53. Using R454B Weigh-In Method
Cº T
DROP
–DT=ºFACTION
53º 19 – 15 = 4 INCREASE THE AIRFLOW
58º 14 – 15 = -1 (WITHIN +3º RANGE) NO CHANGE
62º 10 – 15 = -5 DECREASE THE AIRFLOW
DT
80 24 24 24 23 23 22 22 22 20 19 18 17 16 15
78 23 23 23 22 22 21 21 20 19 18 17 16 15 14
76 22 22 22 21 21 20 19 19 18 17 16 15 14 13
74 21 21 21 20 19 19 18 17 16 16 15 14 13 12
72 20 20 19 18 17 17 16 15 15 14 13 12 11 10
70 19 19 18 18 17 17 16 15 15 14 13 12 11 10
57 58 59 60 61 62 63 64 65 66 67 68 69 70
TEMPERATURE OF AIR
ENTERING INDOOR COIL ºF
INDOOR
COIL
DRY
BULB
B
T
DROP
19º
A
DRY-BULB
WET-BULB ºF
A
72º
B
64º
C
53º
AIR
FLOW
AIR
FLOW
ALL TEMPERATURES ARE
EXPRESSED IN ºF
ASSUME DT = 15 AND A TEMP. = 72º, BELOW C TEMPERATURES REQUIRE ACTION:
+
=
AIRFLOW -,1'225&2,/
1. Determine the desired DT - measure entering air temperature using dry
bulb (a) and wet bulb (b). DT is the intersecting value of a and b in the
table (see triangle).
2. Find temperature drop across coil - measure the dry bulb air
temperature entering and leaving the coil (A and C). Temperature drop
IRUPXOD(T
DROP
) = A minus C.
3. Determine if fan needs adjustmentLIWKHGLႇHUHQFHEHWZHHQWKH
measured (T
DROP
) and the desired
DT (T
DROP
-DT) LVZLWKLQQRDGMXVWPHQWLVQHHGHG6HHH[DPSOHDW
left.
4. Adjust the fan speed - see indoor unit instructions to increase/decrease
fan speed.
NOTE:&KDQJLQJDLUÀRZDႇHFWVDOOWHPSHUDWXUHVUHFKHFNWHPSHUDWXUHVWR
FRQ¿UPWKDWWKHWHPSHUDWXUHGURSDQGGWDUHZLWKLQ
WEIGH-IN -&+$5*,1*0(7+2'
64°F (17.7°C) and Below
Amount
VSHFL¿HGRQ
nameplate Total charge
Adjust amount for
variation in line set length
and liquid line diameter
using table below.
NOTE -,QVXODWHOLTXLGOLQHZKHQLWLVURXWHGWKURXJKDUHDVZKHUH
the surrounding ambient temperature could become higher than the
temperature of the liquid line or when pressure drop is equal to or greater
than 20 psig.
NOTE - The nameplate is shown for illustration purposes only. Go to
actual nameplate on outdoor unit for charge information.
Charging Formula for Liquid Line Charge Adjustments
>/LQHVHWR]IW[WRWDOOHQJWKIDFWRU\FKDUJHIRUOLQHVHW@ FKDUJH
adjustment
Example: Units are factory-charged for 15 feet (4.6 meters) of 3/8” line
VHW)DFWRU\FKDUJHIRU´LVR]IW[ RXQFHV
Liquid Line
6HW'LDPHWHU
R454B
(ounces per foot)
5/16” 3/8”
1/2” 0.40
0.60 1.00
Page 95
31-5000949 Rev. 0
Figure 54. Using R454B Subcooling Method - High Speed (High Capacity)
1. THE DIAGNOSTIC SCREEN ON THE THERMOSTAT OR OUTDOOR CONTROL 7-SEGMENT DISPLAY WILL SHOW INDOOR AND
OUTDOOR MOTOR CFMS OR RPMS.
2. MEASURE OUTDOOR AMBIENT TEMPERATURE.
3. CONNECT GAUGE SET.
4. CHECK LIQUID AND VAPOR LINE PRESSURES. COMPARE PRESSURES WITH COOLING MODE NORMAL OPERATING
PRESSURES IN THE APPLICABLE CHARGING STICKER, NORMAL OPERATING PRESSURES AT MAXIMUM CAPACITY.
NOTE
- THE REFERENCE TABLE IS A GENERAL GUIDE. EXPECT MINOR PRESSURE VARIATIONS. SIGNIFICANT
DIFFERENCES MAY MEAN IMPROPER CHARGE OR OTHER SYSTEM PROBLEM.
5. SET THERMOSTAT FOR HEAT/COOL DEMAND, DEPENDING ON MODE BEING USED:
USING COOLING MODE — WHEN THE OUTDOOR AMBIENT TEMPERATURE IS 60°F (15°C) AND ABOVE. TARGET
SUBCOOLING VALUES (MAXIMUM / 100% CAPACITY) IN APPLICABLE CHARGING STICKER ARE BASED ON 70 TO
80°F (21-27°C) INDOOR RETURN AIR TEMPERATURE; IF NECESSARY, OPERATE HEATING TO REACH THAT
TEMPERATURE RANGE; THEN SET THE INITIAL COOLING DEMAND AT MAXIMUM CAPACITY. THE PREFERRED METHOD IS
TO USE THE “CHARGE MODE” JUMPER ON THE OUTDOOR CONTROL. SEE CHARGE MODE JUMPER SECTION ON PAGE 80.
WHEN PRESSURES HAVE STABILIZED, CONTINUE WITH STEP 6.
6. READ THE LIQUID LINE TEMPERATURE; RECORD IN THE LIQº SPACE.
7. READ THE LIQUID LINE PRESSURE; THEN FIND ITS CORRESPONDING TEMPERATURE IN THE TEMPERATURE/ PRESSURE
CHART LISTED IN THE APPLICABLE CHARGING STICKER AND RECORD IT IN THE SATº SPACE.
8. SUBTRACT LIQº TEMPERATURE FROM SATº TEMPERATURE TO DETERMINE SUBCOOLING; RECORD IT IN SCº SPACE.
9
. COMPARE SCº RESULTS WITH APPLICABLE CHARGING STICKER, BEING SURE TO NOTE ANY ADDITIONAL CHARGE FOR
LINE SET AND/OR MATCH-UP.
10. IF SUBCOOLING VALUE IS GREATER THAN SHOWN IN APPLICABLE CHARGING STICKER FOR THE APPLICABLE UNIT,
REMOVE REFRIGERANT; IF LESS THAN SHOWN, ADD REFRIGERANT.
11. IF REFRIGERANT IS ADDED OR REMOVED, REPEAT STEPS 6 THROUGH 10 TO VERIFY CHARGE.
12. DISCONNECT GAUGE SET AND RE-INSTALL BOTH THE LIQUID AND SUCTION SERVICE VALVE CAPS.
USE
COOLING
MODE
USE
HEATING
MODE
60ºF
(15ºC)
SATº
LIQº –
SCº =
SUBCOOLING
CHARGING METHOD
(All charging MUST be performed while system is operating
either at maximum speed or 100% demand.)
Charge Mode Jumper
Page 96
31-5000949 Rev. 0
Charge Mode Jumper
Pressure
(psig)
Saturated
Liquid
Temp (°F)
Saturated
Vapor
Temp (°F)
0 -58.9 -57.1
25 -19.2 -17.2
30 -13.9 -11.8
35 -9.0 -6.9
40 -4.4 -2.3
45 -0.2 1.9
50 3.7 5.9
55 7.5 9.7
60 11.0 13.2
65 14.4 16.6
70 17.6 19.8
75 20.6 22.9
80 23.6 25.9
85 26.4 28.7
90 29.1 31.4
95 31.7 34.0
100 34.3 36.6
102 35.3 37.6
104 36.2 38.6
106 37.2 30.5
108 38.1 40.5
110 59.1 41.4
112 40.0 42.4
114 40.9 43.3
116 41.8 44.2
118 42.7 45.1
120 43.6 46.0
122 44.5 46.9
124 45.4 46.9
126 46.2 48.6
128 4701 49.4
130 47.9 50.5
132 48.8 51.1
134 49.6 51.9
136 50.4 52.8
138 51.2 53.6
140 52.0 54.4
142 52.8 55.2
144 53.6 56.0
146 54.3 56.7
148 55.14 57.5
150 55.9 58.5
152 56.6 59.0
154 57.4 59.38
156 58.1 60.5
Table 23. R454B Temperature (°F) - Pressure (Psig)
Pressure
(psig)
Saturated
Liquid
Temp (°F)
Saturated
Vapor
Temp (°F)
158 58.9 61.5
160 59.6 62.0
165 61.4 63.8
170 63.1 65.5
175 64.9 67.3
180 66.6 69.0
185 68.2 70.6
190 69.8 72.2
195 71.4 73.8
200 73.0 75.4
202 73.6 76.0
204 74.2 76.6
206 74.9 77.3
208 75.5 77.9
210 76.1 78.5
212 76.7 79.1
214 77.3 79.7
215 77.9 80.2
216 78.4 80.8
220 79.0 81.4
222 79.6 82.0
224 80.2 82.6
226 80.8 83.1
228 81.3 83.7
230 81.9 84.3
232 82.4 84.8
234 83.0 85.4
236 83.6 86.0
238 84.1 86.5
240 84.7 87.1
242 85.2 87.6
244 85.8 88.1
246 86.3 88.7
248 86.8 89.2
250 87.4 89.7
252 87.9 90.3
254 88.4 90.8
256 88.9 91.3
258 89.5 91.8
260 90.0 92.4
262 90.5 92.9
264 91.0 93.4
266 91.5 93.9
268 92.0 94.4
270 92.5 94.9
Pressure
(psig)
Saturated
Liquid
Temp (°F)
Saturated
Vapor
Temp (°F)
272 93.0 95.4
274 93.5 95.9
276 94.0 96.4
278 94.5 96.9
280 95.0 97.4
282 95.5 97.9
284 96.0 98.4
286 96.5 98.8
288 97.0 99.3
290 97.5 99.8
292 97.9 100.5
294 98.4 100.7
296 98.9 101.2
298 99.4 101.7
300 99.8 102.2
302 100.3 102.6
304 100.8 103.1
306 101.2 103.5
308 101.7 104.0
310 102.1 104.4
312 102.8 104.9
314 103.0 105.4
316 103.5 105.8
318 103.9 106.2
320 104.4 106.7
322 104.8 107.1
324 105.3 107.6
326 105.7 108.0
328 106.2 108.5
330 106.6 108.9
332 107.0 109.5
334 107.5 109.7
336 107.9 110.0
338 108.3 110.6
340 108.8 111.0
342 109.2 111.5
344 109.6 111.9
346 110.0 112.3
348 110.5 112.7
350 110.9 113.1
352 111.3 113.5
354 111.7 114.0
356 112.1 114.4
358 112.5 114.8
360 112.9 115.2
Pressure
(psig)
Saturated
Liquid
Temp (°F)
Saturated
Vapor
Temp (°F)
362 113.4 115.6
364 113.8 116.0
366 114.2 116.4
368 114.6 116.8
370 115.0 117.2
372 115.4 17.6
374 115.8 118.0
376 116.2 118.4
378 116.6 118.8
380 117.0 119.2
382 117.4 119.5
384 117.7 119.9
386 118.1 120.3
388 118.5 120.7
390 118.9 121.1
392 119.3 121.5
394 119.7 121.9
396 120.1 122.2
398 120.5 122.5
400 120.8 123.0
405 121.8 123.9
410 122.7 124.9
415 123.6 125.8
420 124.6 126.7
425 125.5 127.6
430 126.4 128.5
435 127.3 129.4
440 128.2 130.2
445 129.0 131.1
450 129.9 132.0
460 131.6 133.7
470 133.3 135.3
480 135.0 137.0
490 136.7 138.6
500 138.3 140.2
510 139.9 141.8
520 141.5 143.3
530 143.0 144.8
540 144.5 146.3
550 146.1 147.8
560 147.5 149.2
570 149.0 150.7
580 150.5 152.1
590 151.9 153.5
600 153.3 154.8
Page 97
31-5000949 Rev. 0
Charge Mode Jumper
R454B CHARGING INFORMATION – FOR COMPLETE CHARGING DETAILS, REFER TO THE
OUTDOOR UNIT INSTALLATION AND SERVICE PROCEDURE
Maintenance checks using the Normal Operating
Pressures table
The charge label on the unit may be used to help perform
maintenance checks. This is not a procedure for charging
the system and any minor variations in the pressures may
EHH[SHFWHGGXHWRGLႇHUHQFHVLQLQVWDOODWLRQV+RZHYHU
VLJQL¿FDQWGHYLDWLRQVFRXOGPHDQWKDWWKHV\VWHPLV
QRWSURSHUO\FKDUJHGRUWKDWDSUREOHPH[LVWVZLWKVRPH
component in the system
Charge Using the Subcooling Method
Cooling Mode – When the outdoor ambient temperature
is 60°F (15°C) and above, use the cooling mode to adjust
the charge using the subcooling method. Target subcooling
values in the table below are based on 70 to 80°F (21-
27°C) indoor return air temperature.
Heating Mode – When the outdoor ambient temperature
is below 60°F (15°C), use the heating mode to adjust
the charge using the subcooling charge levels. Target
subcooling values in the table below are based on 65-75°F
(18-24°C) indoor return air temperature.
(Subcooling Value = Saturated Liquid Temperature -
Liquid Line Temperature)
Matchups/Charge Levels and Line Set Lengths
The charge label on the unit lists all recommended indoor
unit matchups along with the charge levels for the various
sizes of outdoor units. Charge levels on the unit nameplate
are based on installations with either 15ft. (4.6m) or 30ft.
(9.sm) line sets; on line sets with 3/8”(9.5mm) liquid line,
add 3oz. additional refrigerant for every 5ft. longer than
IDFWRU\FKDUJHOHQJWK,IOLQHOHQJWKLVOHVVWKDWIDFWRU\
FKDUJHOHQJWKVXEWUDFWWKLVDPRXQWVHH,QVWDOODWLRQ
,QVWUXFWLRQVIRUPRUHGHWDLOV
Charge Using the Weigh-in Method
,IWKHV\VWHPLVYRLGRIUHIULJHUDQWORFDWHDQGUHSDLUDQ\
leaks and then weigh in the refrigerant charge into the
unit. For charge adjustments, be sure to consider line set
OHQJWKGLႇHUHQFHVDQGUHIHUULQJWRWKHWDEOHDGMXVWIRUWKH
PDWFKXSGLႇHUHQFH
1 - Recover the refrigerant from the unit.
2 - Conduct leak check; evacuate as previously outlined.
,IZHLJKLQJIDFLOLWLHVDUHQRWDYDLODEOHXVHWKH
Subcooling method.
Normal Operating Pressures (Liquid ±10 and Vapor ±5 psig)
Temperature Cooling Operation – Liquid Line Pressure / Vapor Line Pressure
°F (°C)* -024 -036 -048 -060
65 (18.3) 233 / 132 247 / 126 238 / 126 233 / 122
75 (23.9) 270 / 134 287 / 129 279 / 128 251 / 123
85 (29.4) 313 / 136 332 / 131 323 / 129 314 / 126
95 (35.0) 361 / 138 393 / 133 371 / 131 367 / 129
105 (40.6) 409 / 141 440 / 136 413 / 135 414 / 131
115 (46.1) 460 / 142 489 / 138 459 / 139 464 / 136
Temperature Heating Operation – Liquid Line Pressure / True Suction Pressure
20 (-6.6) 303 / 52 336 / 47 301 / 39 278 / 46
40 (4.4) 317 / 83 333 / 80 320 / 73 323 / 72
50 (10) 324 / 102 332 / 98 336 / 91 334 / 89
60 (15.5) 341 / 121 349 / 116 357 / 109 352 / 107
IMPORTANT: R-454B is a zeotropic blend. Use saturated
liquid temperature to calculate liquid subcooling. Charge
unit with liquid only.
Page 98
31-5000949 Rev. 0
Decommissioning
Before carrying out this procedure, it is essential that the
technician is completely familiar with the equipment and
DOOLWVGHWDLO,WLVUHFRPPHQGHGJRRGSUDFWLFHWKDWDOO
refrigerants are recovered safely.
Prior to the task being carried out, an oil and refrigerant
sample shall be taken in case analysis is required prior to
UHXVHRIUHFRYHUHGUHIULJHUDQW,WLVHVVHQWLDOWKDWHOHFWULFDO
power is available before starting decommissioning.
a) Become familiar with the equipment and its operation.
E,VRODWHV\VWHPHOHFWULFDOO\
F%HIRUHDWWHPSWLQJWKHSURFHGXUHHQVXUHWKDW
• mechanical handling equipment is available, if required,
for handling refrigerant cylinders;
• all personal protective equipment is available and being
used correctly;
• the recovery process is supervised at all times by a
competent person;
• recovery equipment and cylinders conform to the
appropriate standards.
d) Pump down refrigerant system, if possible.
H,IDYDFXXPLVQRWSRVVLEOHPDNHDPDQLIROGVRWKDW
refrigerant can be removed from various parts of the
system.
f) Make sure that cylinder is situated on the scales before
recovery takes place.
g) Start the recovery machine and operate in accordance
with instructions.
K'RQRWRYHU¿OOF\OLQGHUVQRPRUHWKDQYROXPH
liquid charge).
L'RQRWH[FHHGWKHPD[LPXPZRUNLQJSUHVVXUHRIWKH
cylinder, even temporarily.
M:KHQWKHF\OLQGHUVKDYHEHHQ¿OOHGFRUUHFWO\DQGWKH
process completed, make sure that the cylinders and
the equipment are removed from site promptly and all
LVRODWLRQYDOYHVRQWKHHTXLSPHQWDUHFORVHGRႇ
k) Recovered refrigerant shall not be charged into another
5()5,*(5$7,1*6<67(0XQOHVVLWKDVEHHQFOHDQHG
and checked.
IMPORTANT
Equipment shall be labeled stating that
it has been decommissioned and emptied of refrigerant.
The label shall be signed and dated. Ensure that there are
ODEHOVRQWKHHTXLSPHQWWKDWVWDWHWKHÀDPPDELOLW\RIWKH
refrigerant used.
Page 99
31-5000949 Rev. 0
Notes
Printed in the U.S.A.
All specifications and illustrations subject
to change without notice and without
incurring obligations.
