Haier AW09EH2VHD Service Manual page 49

Error Code
(Indoor/Outdoor)
E7/LED1: 15 Flash
ID and OD Loss of Communication
Complete the "Check This First" Flow
Chart for both ID and OD units before
continuing.
Models:
AW09EH2VHD
AW12EH2VHD
AW18EH2VHD
1U09EH2VHD
1U12EH2VHD
1U18EH2VHD
Is the Indoor PCB LED
Yes
Does the voltage
between L and C at
Yes
Indoor PCB OK
●
Yes
Go to outdoor PCB
LED2 (upper left) is lighted
Yes
fan motor at CN21. LED1
Yes
motor
●
ERROR CODES and Troubleshooting
Yes
No
No
Is the voltage from
L to C at indoor unit
No
between 0~80VAC
Yes
No
The display is
Yes
No
There is 230 VAC
No
AC-L OUT & AC-N
OUT (CN9 & CN8)
No
Yes
There is less than 5 VDC at
CN22 (module power) and
No
Yes
Is the Indoor PCB LED
pattern repeatedly
Yes
No
Fault is with
outdoor PCB
The voltage between
Yes
PAGE 49