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[ IX Troubleshooting ]
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HWE09120 GB
(3) Trouble treatment when the main power breaker is tripped.
Items to be checked Phenomena Remedy
[1] Perform Meg check between the
terminals on the power terminal
block TB1.
Zero to several ohm, or Meg failure Check each part in the main inverter
circuit.
*Refer to "Simple checking Proce-
dures for individual components of
main inverter circuit".
Diode stack
IPM
Rush current protection resistor
Electromagnetic relay
DC reactor
[2] Turn on the power again and
check again.
1) Main power breaker trip
2) No remote control display
[3] Turn on the outdoor unit and check
that it operates normally.
1) Operates normally without tripping
the main breaker.
a) The wiring may have been short-
circuited. Search for the wire that
short-circuited, and repair it.
b) If item a) above is not the cause of
the problem, the compressor may
have a problem.
2) Main power breaker trip A compressor ground fault can be con-
sidered. Go to (2)-[2].
[TJMU-A]