Inverter And Fan Motor Anomaly - Mitsubishi Electric FDF71VNXVD Technical Manual

Error code
Indoor control PCB
Remote controller:
E51
Outdoor control PCB
1. Applicable model
All models
2. Error detection method
When power transistor anomaly
is detected
for 15 minutes continuously
3. Condition of Error displayed
Same as above
4. Presumable cause
• Outdoor fan motor anomaly
• Inverter PCB anomaly
• Outdoor control PCB anomaly
Note:
LED Green
Keeps flashing
Keeps flashing
Outdoor
Yellow or Red LED
inverter
6 times flash or 2 times flash
PCB
5. Troubleshooting
Model FDC71-140VN
detected between � and
detected after disconnecting
outdoor fan motor?
Model FDC100-140VS and FDC200, 250VS
Replace immediately the inverter PCB and the power transistor
Note (2) How to check the voltage between � and � of CNI3?
For FDC71
For FDC100-140 and FDC200, 250
Red
Content
Stays OFF

Inverter and fan motor anomaly

1 time flash
Green
Keeps flashing
Diagnosis
(1) (2)
Is DC15V
�
on CNI3?
NO Note (1): Under anomalous conditions,
the voltage becomes less than 14VDC
(1)
Is DC15V
189
– –
'11 • PAC-T-160
Countermeasure
Replace INV PCB
YES
If not solved, replace
Noise filter PCB as well
Replace outdoor fan motor
YES
Replace control PCB
NO
If not solved, replace
INV PCB as well
�
�
Remove the coating
1 5 V (+)
�
G N D (- )
�
�
�