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Troubleshooting
Start
●
See reverse side for
wiring diagram and
relevant color-coded
test positions.
Reposition on correct
●
terminals, replace wire if
spliced or the incorrect type
Indoor PCB OK
●
The control wire is 14/4 stranded
copper on the correct terminals, with
no splices or loose connections?
Yes
No
Yes
Yes
No
No
Is the Indoor PCB LED
Does the voltage
between L and C at
0~140VAC?
Is the voltage from
L to C at indoor unit
between 0~80VAC
(approx..)?
Is the Indoor PCB LED
pattern repeatedly
Flash…Flash…On?
Fault is with
outdoor PCB
Replace fan
●
motor
Replace INDOOR PCB
Replace PCB
Replace PCB
Replace IPM
The communication
wire is broken
between 1(N) and 3(C) at ID UNIT?
There is 230 VAC
at the PCB? Across
AC-L OUT & AC-N
OUT (CN9 & CN8)
There is less than 5 VDC at
CN22 (module power) and
GND (pins 1 and 2)?
The voltage between
value at ID UNIT?
Go to outdoor PCB
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes No
No
No
LED2 (upper left) is lighted?
fan motor at CN21. LED1
lights with power back on?
The display is
lighted, yet the
Error Code (Indoor/Outdoor)
E7/LED1: 15 Flash
Complete the “Check This First” Flow
Chart for both ID and OD units before
continuing.
Models:
AW09EH2VHD/ASYW09URDWD
AW12EH2VHD/ASYW12URDWD
AW18EH2VHD/ASYW18URDWD
1U09EH2VHE/ASH109URDSE
1U12EH2VHE/ASH112URDSE
1U18EH2VHE/ASH118URDSE
ERROR CODES and Troubleshooting
PAGE 96
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