Mitsubishi FDU140VNXWVH - Page 167

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166
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'20 • PAC-SM-351
E51
1. Applicable model
5. Troubleshooting
All models
Diagnosis Countermeasure
NO
Is DC15V
detected between ② and ③
on CNI3?
Is DC15V
detected after disconnecting
outdoor fan motor?
YES
YES
NO
• Model FDC100-140VNX-W
• Model FDC100-140VSX-W
Replace immediately the inverter PCB and the power transistor.
Note(1) Under anomalous conditions,
the voltage becomes less than
DC14V.
Note(2) How to check the voltage between ② and ③ of CNI3
⑴⑵
⑴
Replace inverter PCB.
If not solved, replace
noise lter PCB as well.
Replace outdoor fan motor.
Replace outdoor unit control PCB.
If not solved, replace
inverter PCB as well.
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
• Defective outdoor fan motor
• Defective inverter PCB
• Defective outdoor unit control
PCB
Note:
Error code
Remote control:
Content
1-time flashKeeps flashing
6-time flash
4-time flashON
Indoor display
RUN light TIMER light
Green LED
Yellow LED
Red LED
Outdoor unit
control PCB
Outdoor unit
inverter PCB
Inverter and fan motor anomaly
③
②：DC15V(＋)
③：GND(−)
②