Mitsubishi Electric CAHV-P500YB-HPB, Service Handbook

Page: 145 / 169

[
IX
Troubleshooting ]
- 138 -
HWE15070 GB
Error display/failure condition Measure/inspection item
[1] Inverter related errors
4250, 4255, 4220, 4225, 4230, 4235, 4240, 4245, 5301, 5305,
5110, 0403
Check the details of the inverter error in the error log at [1] Error history
item list.(page 114)
Take appropriate measures to the error code and the error details in ac-
cordance with [2] 2.Error code list.(page 123)
[2] Main power breaker trip Refer to "(3) Trouble treatment when the main power breaker is
tripped".(page 141)
[3] Main power earth leakage breaker trip Refer to "(4) Trouble treatment when the main power earth leakage
breaker is tripped".(page 141)
[4] Only the compressor does not operate. Check the inverter frequency on the LED monitor and proceed to (2) -
[4] if the compressor is in operation.(page 140)
[5] The compressor vibrates violently at all times or makes an abnor-
mal sound.
See (2)-[4].(page 140)
[6] Only the fan motor does not operate. Check the inverter frequency on the LED monitor and proceed to (2)-
[6] if the fan motor is in operation.(page 140)
[7] The fan motor shakes violently at all times or makes an abnormal
sound.
Check the inverter frequency on the LED monitor and proceed to (2)-
[6] if the fan motor is in operation.(page 140)
[8] Noise is picked up by the peripheral device <1> Check that power supply wiring of the peripheral device does not
run close to the power supply wiring of the outdoor unit.
<2> Check if the inverter output wiring is not running parallel to the
power supply wiring and the transmission lines.
<3> Check that the shielded wire is used as the transmission line when
it is required, and check that the grounding work is performed prop-
erly on the shielded wire.
<4> Meg failure for electrical system other than the inverter
<5> Attach a ferrite core to the inverter output wiring. (Contact the fac-
tory for details of the service part settings.)
<6> Provide separate power supply to the air conditioner and other
electric appliances.
<7> If the error occurred suddenly, a ground fault of the inverter output
can be considered. See (2)-[4].(page 140)
*Contact the factory for cases other than those listed above.
[9] Sudden malfunction (as a result of external noise.) <1> Check that the grounding work is performed properly.
<2>Check that the shielded wire is used as the transmission line when
it is required, and check that the grounding work is performed prop-
erly on the shielded wire.
<3>Check that neither the transmission line nor the external connec-
tion wiring does not run close to another power supply system or
does not run through the same conduit pipe.
* Contact the factory for cases other than those listed above.
0000001906.book 138 ページ ２０１５年１１月５日 木曜日 午前１１時５５分