Mitsubishi Heavy Industries V Multi FDC71VNX Technical Manual page 237

Error code
Error code
Remote controller: E51
Remote control: E51
1. Applicable model
Models SRC40-60
2. Error detection method
Power transistor primary current
3. Condition of error displayed
If the power transistor primary
current exceeds the setting value
for 3 seconds, the compressor
stops.
4. Presumable cause
• Outdoor unit PCB anomaly
• Dust on outdoor unit PCB
• Blown F2 fuse
Note:
LED Green Red
LED Green Red
Keeps flashing Stays Off
Indoor Keeps flashing Stays OFF
Indoor
5. Troubleshooting
Diagnosis
Check soldered
surfaces on the outdoor unit PCB for
foreign matter like dust,
fouling,etc.
YES
Isn 't F2 fuse
(250V, 20A)blown?
236
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Content
Content
Power transistor error
Power transistor anomaly
(Models SRC50, 60)
(Models SRC40-60 only)
NO
YES
NO
-
'19 • PAC-T-327
Countermeasure
Remove foreign matter
like dust, fouling, etc.
Replace fuse.
Defective outdoor unit
PCB©Replace.