Mitsubishi Electric PFAV-P250VM-E Service Manual page 213

[ X Troubleshooting ]
(2) Inverter output related troubles
Items to be checked
[1] (1)
Check the
INV board er-
ror detection
circuit.
(2)
[2] Disconnect the compressor
Check for wiring, and check the com-
compressor pressor Meg, and coil resis-
ground fault tance.
or coil error.
HWE10190
Disconnect the invert- 1)
er output wire from
the terminals of the
INV board (SC-U,
SC-V, SC-W).
Put the outdoor unit 2)
into operation.
3)
4)
1)
2)
Phenomena
Overcurrent error
(4250 Detail code No. 101, 104,
105, 106, and 107)
Logic error
(4220 Detail code No. 111)
ACCT sensor circuit failure
(5301 Detail code No.117)
IPM open
(5301 Detail code No.119)
Compressor Meg failure
Error if less than 1 Mohm.
Compressor coil resistance failure
Coil resistance value of 0.71 ohm
(20°C [68°F]):P250 model
Coil resistance value of 0.32 ohm
(20°C [68°F]): P350, P400 models
- 204 -
Remedy
Replace the INV board.
Replace the INV board.
Replace the INV board.
Normal
Check that there is no liquid re-
frigerant in the compressor.
If there is none, replace the com-
pressor.
Replace the compressor.
GB