The Communication Fault Between Indoor And Outdoor - Haier AS12NB1HRA-White Service Manual

11.4.10 The communication fault between indoor and outdoor

indoor diplay
Outdoor diplay
Method of
malfunction detection
Malfunction detection
conditions
Supposed causes
Troubleshooting
Restart the a/c and it
becomes normally.
NO
If starting up normally, but
malfunction occurs again after a
while
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 times
Communication is detected by checking the indoor PCB and the outdoor PCB
The outdoor PCB broken leads to communication fault
The indoor PCB broken leads to communication fault
Communication wiring disconnected
The indoor PCB is broken
The outdoor PCB is broken
The module PCB is broken
* Caution
Be sure to turn off power switch before connect or disconnect connector,
parts damage may be occurred.
YES
YES
A
YES
NO
NO
56
Seivice diagnosis
The outdoor mainboard needs
dehumidification.
The outdoor mainboard needs
dedust.
1. Reconnect the linking cable;
2. Replace the linking cable with new
one.
Domestic air conditioner
or else