E51
Power transistor anomaly
（
Model SCM40, 45, 50, 60, 71, 80
）
Outdoor
–
1
time ash
Error code
Remote controller: E51
LED Green Red
Indoor
Content
Power transistor error
Keeps flashing
Stays Off
1. Applicable model
5. Troubleshooting
Model SCM40, 45, 50, 60, 71, 80
only
Diagnosis Countermeasure
2. Error detection method
3.
Condition of Error displayed
4. Presumable cause
Note:
If the power transistor primary
current exceeds the setting value
for 3 seconds, the compressor
stops.
Power transistor primary current
• Faulty outdoor main PCB
• Dust on outdoor main PCB
• Blown F2 fuse
Check soldered
surfaces on the outdoor main PCB for
foreign matter like dust,
fouling,etc.
Isn’t F2 fuse
(250V, 20A)blown?
Remove foreign matter
like dust, fouling, etc.
Replace fuse.
Defective outdoor main
PCBªReplace.
YES
YES
NO
NO
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