DC INVERTER U-MATCH AIR CONDITION MAINTENANCE
123
Tripping◆
If the switching capacity can
meet the requirements?
Tripping
Tripped once energized
Tripped only after the
compressor is started?
Install the
electric switch
as required in
operating
instructions
1. Check if the cable connection L1, L2, L3
and N is correct.
2. Use multimeter to measure L1, L2, L3, N
and earthing wire for any short circuiting.
Procedures:
1) Check if the filter is burnt black
2) If the rectifier is damage.
3) If any other loads on complete unit are
short circuited or short circuited to ground.
3. Check if the AC contactor is stuck?
1. If the temperature of the environment
where the air switch is working is too high?
2. If the IMP module or compressor is short
circuited to ground?
3. If the IMP module or driver board is
damaged?
Record and feed
back
Yes
No
No
No
Yes
Yes
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