Mitsubishi SRK100VNXWPZSX, Service Manual

Page: 120 / 202

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119
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'20 • PAC-SM-351
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
Keeps flashing
Yellow LED
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 DC14V
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
• Inverter PCB anomaly
• Anomalous connection
of connector between the
outdoor unit control PCB and
inverter PCB
• Outdoor unit control PCB
anomaly
• Outdoor fan motor anomaly
Note:
Communication error between
inverter PCB and outdoor unit control PCB