Power Transistor Anomaly (Models Src40-60 Only) - Mitsubishi Heavy Industries FDT Series Technical Manual

Error code
E51
Remote controller:
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 control PCB anomaly
• Dust on outdoor control PCB
• Blown F2 fuse
Note:
LED Green Red
Indoor Keeps flashing Stays OFF
Outdoor 1 time flash
5. Troubleshooting
Diagnosis
Check soldered
surfaces on the outdoor control PCB for
foreign matter like dust,
fouling,etc.
YES
Isn
't F2 fuse
(250V, 20A)blown?
- 414
Content
Power transistor anomaly
(Models SRC40-60)
NO
YES
NO
-
'12 • PAC-T-173
Countermeasure
Remove foreign matter
like dust, fouling, etc.
Replace fuse.
Defective outdoor control
PCB Replace.