Communication Error Between The Indoor And Outdoor Units - Haier HSU24VHJ(DB) Service Manual

7.3.8 Communication error between the indoor and outdoor units

:
The date received from the another unit in indoor unit-outdoor unit signal transmission is
checked whether is normal
When the date sent from the another unit cannot be received normally,or when the content
of the data is abnormal
indoor unit- outdoor unit signal transmission error due to wiring error
Faulty PCB
or else parts damage may be occurred.
Restart the a/c and it
becomes normally.
NO
If starting up normally, but
malfunction occurs again
after a while
No
Check whether the linking cable
between the indoor and outdoor
is well connected or whether its
core wires are well insulated.
Yes
A
HSU24VHJ DB
LED1 flash 15 times
Be sure to turn off power switch before connect or disconnect connector,
Yes
Yes
No
6
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
Service Diagnosis