Samsung AVMKH020EA4 Service Manual page 207

Troubleshooting
11-2-17 The reverse phase of 3 phases power
Outdoor unit display
Indoor unit display
Judgment method
Causes
1. Check point
1. - Check the 3 phases detection power on the outdoor unit PCB.
1. - The color of power cable on L1(R), L2(S), L3(T) of 3 phases detection connecter is red, white, black.
(Be sure to change the color and order.)
Check the main voltage.
Is the voltage between
red~white/white~black/red~black
of CN82 power cable about
Yes
After switching power breaker off exchange
the 2 lines among the three lines of 3 phases
inlet. And check again it.
Is E425 error occurred again?
Yes
Replace the PCB because it is a defect of
3 phases detection circuit.
11-21
(Operation) (Timer)
- In case of being reversed the order of phases or not entered one or every phase voltage
compared to the 3 phases detection circuit wave (If the phase voltage is return to normal,
error is auto released)- Indoor fan motor defect or lock
- EEV open error
AC 380V?
(Fan) (Filter) (Removing frost)
No
Manage to the troubles with measuring
from 3 phases power inlet.
No
CN82
Power cable for check
3 phase power
Normal operation
Samsung Electronics