Mitsubishi FDU140VNXWVH - Page 163

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162
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'20 • PAC-SM-351
Error code
Remote control:
Content
1-time flashKeeps flashing
Keeps flashing
––
Indoor display
RUN light TIMER light
Green LED
Yellow LED
Red LED
Outdoor unit
control PCB
Outdoor unit
inverter PCB
E45
1. Applicable model
5. Troubleshooting
All models
Diagnosis Countermeasure
YES
NO
YES
Replace the outdoor unit control PCB
NO
YES
YES
NO
Is the
connection of connectors between
the inverter PCB and the outdoor unit
control PCB OK?
Are both
switches of JSW10,11
on the inverter PCB
set correctly?
Is LED
on the inverter PCB
flashing?
For 3-phase models
Is the
communication wire between the
inverter PCB and the outdoor unit control
PCB connected properly?
Does it become normal?
YES
NO
NO
NO
For single-phase models
Note(1) How to check
voltage at CN13
→See E51
Note(2) Under anomalous
conditions, the
voltage becomes
less than DC14
V
Is DC15V
detected between ②
and ③ on CNI3?
Is DC15V
detected after disconnecting
outdoor fan motor?
YES
YES
⑴
⑵
NO
Correct the connection.
Set JSW10, 11 correctly.
➞
See page 70 or 71.
No power is supplied to
inverter PCB.
Check the power source
voltage and correct it.
If not solved, find the
cause by checking
following points.
• Fan motor anomaly
Replace outdoor fan motor.
Replace outdoor unit control
PCB if not solved, replace
inverter PCB as well.
Connect the
communication wire
securely.
Replace inverter PCB.
OK
2. Error detection method
When the communication
between inverter PCB and
outdoor unit control PCB
is not established.
3 . Condition of error displayed
Same as above.
4. Presumable cause
• Defective inverter PCB
• Defective connector between
the outdoor unit control PCB
and inverter PCB
• Defective outdoor unit control
PCB
• Defective outdoor fan motor
Note:
Communication error between
inverter PCB and outdoor unit control PCB