Mitsubishi SCM40ZJ-S Service Manual page 131

Error code
Remote controller: E51
1. Applicable model
Model SCM100, 125 only
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
• Defective outdoor fan motor
• Defective inverter PCB
• Defective outdoor control
PCB
Note:
LED Green Red
Indoor Keeps flashing Stays OFF
Outdoor – 1 time flash
5. Troubleshooting
Diagnosis
Is DC15V
detected between the connector
CNI4 �-� on the
inverter PCB?
NO
Is DC15V
detected between the
hanesses at the control PCB side after
disconnecting the connector
(CNI4)?
NO
Is DC15V
detected on the fan motor
connector?
NO
130
-
Content
Inverter and fan motor anomaly
（ Model SCM100 , 125 ）
YES
YES
YES
-
'11 • SCM-SM-110
Countermeasure
Defective inverter PCB ➞
Replace.
Broken harness wire
Replace fan motor.
Defective outdoor control
PCB ➞ Replace.