Haier AW09EH2VHD Service Manual page 36

Error Code
(Indoor/Outdoor)
F3/LED1: 4 Flash
Communication Fault Between IPM and
Outdoor PCB
Complete the "Check This First" Flow
Chart before continuing.
Models:
AW09EH2VHD
AW12EH2VHD
AW18EH2VHD
1U09EH2VHD
1U12EH2VHD
1U18EH2VHD
PAGE 36
Line voltage at
AC-L OUT & AC-N
OUT on the PCB
Yes
Line voltage at AC-L & AC-N
on the IPM (9K CN8 & CN9 /
Yes
Module Power voltage -
CN22 on the PCB:
Yes
Module Power voltage -
CN10 on the IPM
Yes
●
Module Com voltage - CN23 on the PCB
Yes
●
Module Com voltage - CN11 on the IPM
Yes
●
ERROR CODES and Troubleshooting
●
Start
Line voltage at AC-L & AC-N
No
Yes
No
Yes
No
No
wiring harness
No
No power wiring
harness
No
COM Wiring
No
from building
Harness