Indoor Fan Motor Anomaly - Mitsubishi Heavy Industries SRK20ZSX-W Service Manual

Error code
Remote control: 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
-1
than 200min 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 unit control
PCB
• Foreign material at rotational
area of fan propeller
• Defective fan motor
• Dust on indoor unit control
PCB
• Blown fuse
• External noise, surge
Note:
LED Green Red
Indoor Keeps flashing 1-time flash
–
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
Power source reset
Is it normalized?
135
-
Content

Indoor fan motor anomaly

YES
NO
Note (1) for GND
（1）
NO
Is the fuse F2
NO
(FDUM, FDE: F3)
blown?
YES
NO
YES
-
'19 • SCM-SM-276
Countermeasure
Remove foreign material.
Replace the fan motor.
Check power voltage.
Replace faulty fan motor and
indoor unit control PCB.
Replace fan motor. (If the
error persists after replacing
the fan motor, replace the
indoor unit control PCB.)
Malfunction by temporary
noise.