Mitsubishi Electric PUHY-P1000, Руководство по обслуживанию

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[8-9 Troubleshooting Inverter Problems ]
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HWE14040 GB
8-9-2 Checking the Inverter Board Error Detection Circuit
8-9-3 Checking the Compressor for Ground Fault and Coil Resistance Problems
8-9-4 Checking the Inverter for Damage at No-Load
Items to be checked Phenomena Remedy
(1) Remove power supply. 1) Overcurrent error
Error code: 4250
Detail code: No. 101, 104, 105, 106, and
107 Replace the INV board.
(2) Disconnect the inverter
output wire from the ter-
minals of the INV board
(SC-U, SC-V, SC-W). 2) Logic error
Error code: 4220
Detail code: No. 111 Replace the INV board.
(3) Apply power supply. 3) ACCT sensor circuit failure
Error code: 5301
Detail code: No.117 Replace the INV board.
(4) Put the outdoor unit into
operation. 4) IPM open
Error code: 5301
Detail code: No.119 Normal
Items to be checked Phenomena Remedy
Disconnect the compressor wir-
ing, and check the compressor
Meg, and coil resistance. 1) Compressor Meg failure
Error if less than 1 M
Ω
.
Check that there is no liquid refrigerant
in the compressor.
If there is none, replace the compres-
sor.
2) Compressor coil resistance failure
Coil resistance value of 0.72
Ω
(20°C [68°F]): P200, P250 models
Coil resistance value of 0.32
Ω
(20°C [68°F]): P300, P350 models
Coil resistance value of 0.30
Ω
(20°C [68°F]): P400, model
Coil resistance value of 0.43
Ω
(20°C [68°F]): P450, P500 models
Replace the compressor.
Items to be checked Phenomena Remedy
(1) Remove power supply. 1) Inverter-related problems are detected. Connect the short-circuit connector to
CN6 or set SW001-1 to ON, and go to
8-9-2.
(2) Disconnect the inverter
output wire from the ter-
minals of the INV board
(SC-U, SC-V, SC-W). 2) Inverter voltage is not output at the termi-
nals (SC-U, SC-V, and SC-W) Replace the INV board.
(3) Disconnect the short-cir-
cuit connector from CN6
on the INV board. 3) There is an voltage imbalance between
the wires.
Greater than 5% imbalance or 5V Replace the INV board.
(4) Apply power supply.
(5) Put the outdoor unit into
operation.
Check the inverter output
voltage after the inverter
output frequency has sta-
bilized. 4) There is no voltage imbalance between
the wires. Normal
* Reconnect the short-circuit connec-
tor to CN6 or restore SW001 to its orig-
inal setting after checking the voltage.