Mitsubishi FDT71VH - Page 118

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117
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'20 • PAC-SM-351
Error code
Remote control:
LED Green Red
Outdoor control PCB
Outdoor inverter
PCB
1-time flashKeeps flashing
Yellow LED
Indoor control PCB
Stays OFFKeeps flashing
Content
1-time flash
E42
Current cut (1/2)
1. Applicable model
5. Troubleshooting
Diagnosis Countermeasure
Is the
power source
voltage OK?
YES
Are the
service valves
opened?
NO
YES
Is the
high pressure
during operation
OK?
YES
Is the
checked result of
insulation resistance and
resistance between terminals (1) of
compressor motor
OK?
YES
(1) 1.044Ω or more at 20°C (Models FDC100-140VNX-W)
1.044Ω or more at 20°C (Models FDC100-140VSX-W)
NO
NO
NO
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Check power source.
Open the service valves.
Check refrigerant amount
and refrigerant circuit.
* In case of transitional
increase of high pressure
and/or test run, several
times restarting may
recover it, because liquid
refrigerant (migrated)
in the compressor is
discharged from the
compressor.
Replace compressor.
2. Error detection method
In order to prevent from
overcurrent of inverter,
if the current exceeds the
specications, it makes the
compressor stopping.
3 . Condition of error displayed
• If the output current of inveter
exceeds the specications,
it makes the compressor
stopping.
• After 3-minute delay, the
compressor restarts, but if this
amonaly occurs 4 times within
30 minutes after the intial
detection.
4. Presumable cause
• The service valves closed
• Faulty power source
• Insufficient refrigerant amount
• Faulty compressor
• Faulty power transistor
module
Note: