Mitsubishi Heavy Industries SCM71ZM-S1 Technical Manual page 277

Error code
Error code
Remote control: Remote controller: E51
E51
1. Applicable model
All models
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
• Faulty outdoor main PCB
• Dust on outdoor main PCB
• Blown F4 fuse
Note:
LED Green Red
LED Green Red
Indoor Keeps flashing Stays OFF
Keeps flashing Stays Off
Indoor
Outdoor – 1-time flash
5. Troubleshooting
Diagnosis
Check soldered
surfaces on the outdoor main PCB for
foreign matter like dust,
fouling,etc.
Isn't F4 fuse
(250V, 20A)blown?
276
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Content Content
Power transistor anomaly
Power transistor error
NO
YES
YES
NO
-
'17 • SCM-T-225
Countermeasure
Remove foreign matter
like dust, fouling, etc.
Replace fuse.
Defective outdoor main
PCB➞Replace.