Mitsubishi Heavy Industries FDT200VSAWPVH Service Manual page 110

Error code
Indoor control PCB
Remote control: E45
Outdoor control PCB
Outdoor inverter
1. Applicable model
All models
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:
LED Green
Keeps flashing
Keeps flashing
Yellow LED
PCB
Keeps flashing
5. Troubleshooting
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?
Red
Content
Stays OFF
Communication error between
1-time flash
inverter PCB and outdoor unit control PCB
Diagnosis
NO
YES
109
- -
'21 • PAC-SM-383
Countermeasure
Correct the connection.
NO
Set JSW10, 11 correctly.
NO
➞ See page from 55.
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
NO
communication wire
securely.
Replace inverter PCB.
NO
OK