Indoor Fan Motor Anomaly - Mitsubishi Heavy Industries SRK20ZJX-S Service Manual

Error code
Remote controller:
E16
1. Applicable model
All models
2. Error detection method
Detected by rotation speed of
indoor fan motor
3. Condition of Error displayed
When actual rotation speed of
indoor fan motor drops to lower
than 200rpm for 30 seconds
continuously, the compressor
and the indoor fan motor
stop. After 2-seconds, it starts
again automatically, but if this
error occurs 4 times within
60 minutes after the initial
detection.
4. Presumable cause
• Defective indoor power PCB
• Foreign material at rotational
area of fan propeller
• Defective fan motor
• Dust on control PCB
• Blown fuse
• External noise, surge
Note:
LED Green Red
Indoor Keeps flashing Stays OFF
Outdoor – Stays OFF
5. Troubleshooting
Diagnosis
Does any
foreign material
intervene in rotational area
of fan propeller?
NO
Does the fan
rotate smoothly when turned
by hand?
YES
Is DC280V
detected between - of
fan motor connector
CNM?
YES Is the fuse F202 blown?
Power supply reset
Is it normalized?
97
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Content

Indoor fan motor anomaly

YES
NO
Note (1) for GND
1
NO
NO
YES
NO
YES
-
'10 • SCM-SM-094
Countermeasure
Remove foreign material.
Replace the fan motor.
Check power voltage.
Replace faulty fan motor
and power PCB.
Replace fan motor. (If the
error persists after replacing
the fan motor, replace the
indoor control PCB.)
Malfunction by temporary
noise