Communication Error Between The Indoor And Outdoor Units - Haier AS09/12GS2ERA Service Manual

7.3.8 Communication error between the indoor and outdoor units

Indoor display
Outdoor: display
Method of The date received from the another unit in indoor unit-outdoor unit signal transmission is
Malfunction checked whether is normal
Detection
When the date sent from the another unit cannot be received normally,or when the content
Malfunction
Decision of the data is abnormal
Conditions
Supposed
Causes
Troubleshooting
or else parts damage may be occurred.
Restart the a/c and it
becomes normally.
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.
AS09/12GS2ERA 1U09/12BS1ERA-SM
E7
LED1 flash 15 times
indoor unit- outdoor unit signal transmission error due to wiring error
Faulty PCB
* Caution Be sure to turn off power switch before connect or disconnect connector,
NO
No
Yes
A
62
The outdoor mainboard needs
Yes
dehumidification.
The outdoor mainboard
Yes
needs dedust.
1. Reconnect the linking cable;
No
2. Replace the linking cable with
new one.
Servive Diagnosis
Domestic air conditioner