Mitsubishi Heavy Industries SRK100VNXWZRF Service Manual page 122

Error code Indoor display
Remote control: E45
Outdoor unit
control PCB
Outdoor unit
inverter PCB
1. Applicable model
Model FDC200VSA-W
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:
RUN light TIMER light
– –
Green LED Red LED
Keeps flashing 1-time flash
Yellow LED
Keeps flashing
5. Troubleshooting
Diagnosis
Is the
connection of connectors between
the inverter PCB and the outdoor unit
control PCB OK?
YES
Are both
switches of JSW10,11
on the inverter PCB
set correctly?
YES
Is LED
on the inverter PCB
flashing?
YES
Is the
communication wire between the
inverter PCB and the outdoor unit control
PCB connected properly?
YES
Replace the outdoor unit control PCB.
Does it become normal?
121
-
Communication error between
Content
inverter PCB and outdoor unit control PCB
(Model FDC200VSA-W only)
NO
NO
NO
NO
NO
YES
-
'22 • PAC-SM-422
Countermeasure
Correct the connection.
Set JSW10, 11 correctly.
➞See page from 52.
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
• 52X anomaly
• Broken cementresistor
(15W)
Connect the
communication wire
securely.
Replace inverter PCB.
OK