Mitsubishi Electric SRK100VNPZJX, Technical Manual

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402
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'12 • PAC-T-174
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 FDC100-140VN
• Model FDC100-140VS and FDC200, 250VS
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 filter PCB as well.
Replace outdoor fan motor.
Replace outdoor 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
• Outdoor fan motor anomaly
• Inverter PCB anomaly
• Outdoor control PCB anomaly
Note:
Error code
Remote controller:
LED Green Red
Outdoor control PCB
Outdoor inverter
PCB
1 time flash Keeps flashing
Keeps flashing
Indoor control PCB Stays OFF Keeps flashing
Content
6 times flash or 2 times flash
Yellow LED or Red LED Green LED
Inverter and fan motor anomaly
③
②
② ： 15V (＋)
③ ： GND (−)