Mitsubishi SCM40ZJ-S User Manual

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114
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'11 • SCM-SM-110
Error code
Remote controller:
LED Green Red
Indoor
Content
E20
Indoor fan motor rotation
speed anomaly
（
FDTC and FDUM series
）
Keeps ashing 1 time ash
Outdoor Keeps ashing Stays OFF
1. Applicable model
5. Troubleshooting
FDTC and FDUM series only
Diagnosis Countermeasure
NO
YES
YES
Does any
foreign material
intervene in rotational area
of fan propeller?
Is DC280V
detected between - of
fan motor connector
CNM?
Is it normalized?
Is the fuse F202
(FDUM:F3) blown?
Does the fan
rotate smoothly when turned
by hand?
YES
NO
NO
NO
YES
（1）
Note (1)  for GND
NO
YES
Power supply reset
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
2. Error detection method
Detected by rotation speed of
indoor fan motor
3. Condition of Error displayed
When the actual fan rotation
speed does not reach to the
speed of [required speed-50rpm]
after 2 minutes have been
elapsed since the fan motor
rotation speed command
was output, the unit stops by
detecting indoor fan motor
anomaly.
4. Presumable cause
• Defective indoor power (control)
PCB
• Foreign material at rotational
area of fan propeller
• Defective fan motor
• Dust on control PCB
• Blown fuse
• External noise, surge
Note:

Mitsubishi SCM40ZJ-S Specifications

General

Brand	Mitsubishi
Model	SCM40ZJ-S
Category	Air Conditioner
Language	English