Inverter Pcb A/F Module Anomaly - Mitsubishi Heavy Industries FDT Series Technical Manual

Error code
E47
Remote controller:
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
makes the compressor stopping.
3. Condition of error displayed
• If the output current of A/F
it makes the compressor
stopping.
4. Presumable cause
• Defective inverter PCB
Note:
LED Green
Indoor Keeps flashing
Keeps flashing
Yellow LED
PCB
7 times flashing
5. Troubleshooting
Power supply
voltage OK?
checked results of
insulation resistance and
coil resistance (1) of
compressor motor
Red
Content
Stays off

Inverter PCB A/F module anomaly

1 time flash
Diagnosis
Is the
YES
Is the
OK?
(1) 1.154 or more at 20°C
YES
- 409 -
'12 • PAC-T-173
(Model FDC71VNX)
Countermeasure
Check power supply.
NO
Replace compressor.
NO
Defective outdoor Inverter
PCB Replace.