Mitsubishi Heavy Industries FDT71VNXVD Service Manual page 82

Error code
Indoor
Remote controller:
E47
Outdoor control PCB
Outdoor
Inverter
1. Applicable model
Model FDC71
2. Error detection method
In order to prevent from
overcurrent of A/F, if the current
exceeds the specifications, it
makes the compressor stopping.
3. Condition of error displayed
• If the output current of A/F
exceeds the specifications,
it makes the compressor
stopping.
4. Presumable cause
• Defective inverter PCB
Note:
LED Green
Keeps flashing
Keeps flashing
Yellow LED
7 times flashing
PCB
5. Troubleshooting
Is the
Power supply
voltage OK?
YES
Is the
checked results of
insulation resistance and
coil resistance (1) of
compressor motor
OK?
YES
Red
Content
Stays off
Inverter PCB A/F module anomaly
1 time flash
(Model FDC71VNX)
Diagnosis
NO
NO
(1) 1.154 or more at 20°C (FDC71)
82
92
– –
'10 • PAC-SM-137A
Countermeasure
Check power supply.
Replace compressor.
Defective outdoor Inverter
PCB Replace.