Mitsubishi Heavy Industries FDT28KXE6A Service Manual page 56

Error code
None
Remote controller:
7-segment display:
1. Applicable model
All models
2. Error detection method
3. Condition of error displayed
4. Presumable cause
• Louver motor anomaly
• Disconnection/breakage of
LM harness
• Limit switch anomaly
Note:
LED Green Red
Keeps flashing Stays Off
Indoor
Keeps flashing Stays Off
Outdoor
5. Troubleshooting
Diagnosis
� Check at the indoor unit side.
Operate after waiting for more than 1 minute.
Does the
louver operate when
power on?
YES
Is the
setting of airflow
direction change
prohibited?
NO
In cases of FDTW, FDTS and FDTQ
It is normal if LM can
be stopped by pressing
LS two times.
link press LS till crick sound
In cases of FDT, FDTC, FDE and FDK
Check the remote controller whether
it is fixed free flow setting or not.
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Content
Louver motor anomaly
NO
Is there
any disconnection
or breakage of LM
connector?
NO
Is LM harness
broken?
NO
Is LM locked? NO
YES
Does LM turn
NO
smoothly?
NO
Is there
any problem on
YES
the connection
link?
NO
YES
Check the remote controller whether
it is fixed free flow setting.
Check how LS reacts
when the power is turned
OFF and ON again
NO
Does the louver
NO
can be heard?
YES
Note (1) LM: Louver motor
(2) LS: Limit switch
–
Countermeasure
YES
Correct it
Repair harness
YES
Check connector (CNJ)
Replace Louver Motor
Correct it
Correct it
Replace indoor control
PCB
Correct it
Adjust LM lever and then
check again.
• LS anomalyReplace
• Indoor control PCB
anomalyReplace.