8
TROUBLESHOOTING
E9
( AC under voltage protection )
Diagnosis
Handling
E12
(IPM modular sensor error
）
Diagnosis
Handling
The power supply wire should
be connected firmly and correctly
Check if the power supply
wire is reliably connected
Check if the wire diameter meets
the requirements in the manual
Yes
Replace the power cord
to the right diameter
Check if the compressor
wiring is correct
Yes
The power supply
wire interface
It should be connect correctly
according to the wiring diagram
Yes
If there is still abnormal
replace the mainboard
No
Power off and re-power on to
see whether it is normal
The compressor
wire interface
No
No
No
Power off and re-power on to
see whether it is normal
If there is still abnormal
replace the mainboard
