40
If voltage among A, B,
C on wired controller
is AC 14V
If voltage between
A and B on indoor
terminal block is AC
14V
If voltage between
L and N on indoor
terminal block is AC
220V
Check indoor
power cable
If indoor fuse is
Check the abnormal reason
Wired controller
PCB abnormal
Wiring between indoors
and wired controller is wrong
If LED (green, red)
on indoor PCB is light
1. Indoor transformer abnormal
2. Indoor PCB abnormal
Connect CN23
If CN23 on master unit
is connected
1. Indoor transformer abnormal
2. Wiring of indoor PCB is
damaged or the port is not
inserted well
Heating mode in priority,
the non-prior mode (cooling)
and the dip switch setting
mode are different
Indoor groups faulty
1. indoor PCB abnormal
2. wired controller abnormal
Normal
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No