Communication Error Between The Indoor And Outdoor Units - Haier AS12GB3HRA Service Manual

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11.4.9 Communication error between the indoor and outdoor units

Indoor display
Outdoor display:
Method of
malfunction
detection
Malfunction
detection
conditions
Supposed
causes
Troubleshooting
If starting up normally, but
malfunction occurs again
Check whether the linking cable
between the indoor and outdoor is
well connected or whether its core
wires are well insulated.
E7
LED1 flash 15 time
Check whether the signal which is transmitted between indoor and outdoor
unit is normal
When the communication-signal cannot be received normally, or when the
content of the signal abnormal.
Indoor unit- outdoor unit signal transmission error due to wiring error
Faulty PCB
Be sure to turn off power switch before connect or disconnect connector, or
else
parts damage may be caused
Restart the a/c and it
after a while
YES
YES
YES
NO
The outdoor PCB needs dedusting.
1. Reconnect the linking cable;
NO
2. Replace the linking cable with
46
Service diagnosis
The outdoor PCB needs
dehumidification.
new one.
Domestic air conditioner

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