DC INVERTER U-MATCH AIR CONDITION MAINTENANCE
136
◆Trip
Trip
?
It is recorded
and reflected.
Yes
No
Do all the
switches meet
the
requirement?
Please
install the
switched
according
to the
instruction.
Does it trip upon
energization?
Does it trip after
startup of
compressor?
1. Check if L1, L2, L3 is highly
connected.
2. Use universal meter to test if
there is short circuit among L1,
L2, L3 and ground wire N.
Steps are as below:
1. Inspect if the filter board is
burnt.
2. Check if commutate bridge is
damaged.
3. Check if there is short circuit
for other load of the complete
unit.
1. Is the ambient temperature is
too high?
2. Does short circuit happen to
IPM module or compressor?
3. Is IPM module or driving board
damaged?
No
YesYes
No
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