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Page 12 of 12 507296-02Cmrcool.com
208/230V-1PH,60HZ
Description
DS1 (GREEN) DS2 (RED)
No Power to Control OFF OFF
Normal Operation / Power to
Control
Simultaneous Slow Flash
Anti-Short Cycle Lockout Alternate Slow Flash
Low Pressure Switch Fault OFF Slow Flash
Low Pressure Switch Lockout OFF ON
High Pressure Switch Fault Slow Flash OFF
High Pressure Switch Lockout ON OFF
G
W1
C
R
O
THERMOSTAT
L1
T1
T2
L2
C
H
F
DUAL
CAPACITOR
COMPRESSOR
C
S
R
537661-01
CONNECTION DIAGRAM, HEAT PUMP
CONSTANT TORQUE BLOWER, SINGLE PHASE
RED
BLK
208V
240V
24V
INDOOR
BLOWER
MOTOR
NOTE:
IF ANY OF THE ORIGINAL
WIRE IS REPLACED THE
SAME SIZE AND TYPE WIRE
MUST BE USED.
USE COPPER CONDUCTOR
ONLY, MIN 75
C WIRE
LINE VOLTAGE FIELD INSTALLED
WARNING-
ELECTRIC SHOCK HAZARD. UNIT
MUST BE GROUNDED IN ACCORDANCE
WITH NATIONAL AND LOCAL CODES.
BLU
YEL
NC
C
W1
C
L
R
O
Y1
FAN
O-OUT
LO-PS
DF
HI-PS
COMMON
Y1 OUT
24 V
Y
RED
YEL
BLU
WHT
GRN
ORG
DIAGNOSTIC CODES FOR DEFROST CONTROL LEDS
Note: Because the Pressure Switches are monitored only when "Y1" (Input) is active, the code
for pressure switch open will not be seen when "Y1" is off. Instead, the "Normal Operation" or
"Anti Short Cycle" code will be seen.
Also, when a pressure switch opens and caused a short cycle lockout, the pressure switch-open
code will be seen until it closes, then the short cycle lockout code will flash unless it has already
expired.
W1 & W2 CAN BE USED TO STAGE
ELECTRIC HEAT ACCESSORY ON
10, 15 & 20KW MODELS
5 & 7.5 KW HEATER ACCESSORIES
FUNCTION OFF W1 ONLY.
BLK
DEFROST
CONTROL
WHT
DEFROST
CONTROL
J2-2
J2-4
BLK
C
1
2
3
4
5
WHT
BLU
RED
BLU
WHT
L
N
G
NOTE: TAP1 FOR FAN ONLY
TAP 2 FOR COOLING
TAP3 FOR HIGH STATIC COOLING
TAP4 AND TAP5 FOR ELECTRIC HEAT- REFER TO HEATING LABEL
TRANSFORMER
L
G
N
BLK
CONTACTOR
BLK
YEL W/STRIPE
CONTACTOR
(See instructions or markings on System Diagnostic
Module for codes of System Diagnostic Module)
BLK
BLU
WHT
FAN
YEL
YEL W/STRIPE
K1-2
K1-1
J2-1
B1
CMC1
C12
GRY
ORG
BLK
CONDENSER
FAN MOTOR
PUR
J1-2
J1-1
J1-3
B4
B3
CONTACTOR
K1
HIGH PRESSURE
SWITCH
THERMAL PROTECTION
SWITCH
(IF USED)
S173
S4
J1-11
J1-12
REV. VALVE
DEFROST
T'STAT
LOW PRESSURE
SWITCH
GRY
GRY
BLK
BLK
BRN
BRN
L1
S79
S6
J1-5
J1-6
J1-8
J1-9
J1-7
J1-10
YEL
T1
BLU
YEL
J2-6
J2-5
S1
CONTROL CIRCUIT WIRING TO
BE 24 VOLT, NEC CLASS-2
CMC1
J1: PLUG THROUGH CONTROL PANEL (12 PIN)
J2: PLUG FOR ACCESSORY HEAT (6 PIN)
INDOOR BLOWER MOTOR
GRN
FLOAT SWITCH
(IF USED)
YEL
YEL
CRANK
CASE
HEATER
(IF USED)
BLK
BLK
HR1
Figure 9. Connections Diagram - Heat Pump Constant Torque
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