Mitsubishi SRK100VNXWPZSX, Service Manual

Page: 117 / 202

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116
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'20 • PAC-SM-351
E41
1. Applicable model
5. Troubleshooting
Diagnosis Countermeasure
NO
Is DC15V detected
between
②
and
③
on
CNI3?
•
Single phase models (FDC71-140VNX-W)
⑴ ⑵
NO
YES
Is DC15V
detected after disconnecting
outdoor fan motor?
⑴
YES
Note(1) Under anomalous conditions,
ࠉࠉ the voltage becomes less than DC14V.
Note(2) How to check the voltage between
②
and
③
of CNI3?
ࠉࠉࠉ
⇒
See E51
•
3 phase models (FDC100-140VSX-W)
E41
⇒
Replace inverter PCB.
Replace inverter PCB .
If not solved, replace
noise filter PCB as well.
Replace outdoor fan motor.
Replace outdoor unit
control PCB .
If not solved, replace
inverter PCB as well.
2. Error detection method
When less than DC14V of
the output voltage is detected
between ② and ③ on CNI3,
E41 is displayed.
(See "Note" mentioned below.)
3. Condition of error displayed
Seme as above.
4. Presumable cause
• Inverter PCB anomaly
• Outdoor fan motor anomaly
• Outdoor unit control PCB
anomaly
• Noise filter PCB anomaly
Note:
The "Single phase models" of inverter PAC have no function to output the signal for the power transistor overheat. However
since the power source for the power transistor and the outdoor fan motor is in the same line, when the anomaly of the
outdoor fan motor occurs, E41 is displayed.
Power transistor overheat
Error code
Remote control:
LED Green Red
Outdoor control PCB
Outdoor inverter
PCB
1-time flash Keeps flashing
Indoor control PCB Stays OFF Keeps flashing
Content
6-time flash
Yellow LED