Haier HSU-09HEG03/R2(DB) - The Communication Fault between Indoor and Outdoor

Service Diagnosis
60
Domestic Air Conditioner
7.4.10 The communication fault between indoor and outdoor

Indoor display E7
outdoor display LED1 flash 15 times
Method of
Communication is detected by checking the indoor PCB and the outdoor PCB
Malfunction
Detection
Malfunction ■
The outdoor PCB broken leads to communication fault
Decision ■
The indoor PCB broken leads to communication fault
Conditions
Supposed ■ Communication wiring disconnected
Causes ■
The indoor PCB is broken
■ The outdoor PCB is broken
■ The Module PCB is broken
Troubleshooting
* Caution Be sure to turn off power switch before connect or disconnect connector, or
else parts damage may be occurred.