Mitsubishi SCM50ZJ-S1 User Manual

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133
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'11 • SCM-SM-110
Error code
Remote controller:
LED Green Red
Content
Indoor Stays OFF Keeps flashing
E57
Insufcient refrigerant amount
or detection of service valve closure
Outdoor
– 2 times ash
1. Applicable model
5. Troubleshooting
All models
Diagnosis Countermeasure
NO
YES
NO
YES
Is the
service valve fully
opened?
Are the
connections of indoor
heat exchanger and/or return air
temperature thermistor
connectors OK?
NO
YES
NO
YES
Are the
characteristics of indoor heat
exchanger and/or return air
temperature thermistor
OK?
Is the low
pressure during operation
normal?
Indoor heat exchanger, return air temperature thermistor
Temperature-resistance characteristics
15
10
5
0 10 30 4020 50
Temperature thermistor resistance (kΩ)
Temperature (°C)
5kΩ at 25°C
(Broken wire)
(Shot circuit)
Open fully.
Correct indoor heat
exchanger, return air
temperature thermistor
connector connections.
Defective indoor heat
exchanger, return air
temperature thermistor
➞
Replace.
Charge refrigerant.
Defective indoor control
PCB
➞
Replace. (Defective
indoor heat exchanger,
return air temperature
thermistor input circuits)
2. Error detection method
• Judge insufficient refrigerant
amount by detecting the
temperature differnce between
indoor heat exchanger (ThI-R)
and indoor return air (ThI-A).
3. Condition of Error displayed
When the insufcient refrigerant
amount is detected 3 times
within 60 minutes.
4. Presumable cause
• Defective indoor heat
exchanger temperature
thermistor
• Defective indoor return air
temperature thermistor
• Defective indoor control PCB
• Insufficient refregerant
amount
Note:

Mitsubishi SCM50ZJ-S1 Specifications

General

Brand	Mitsubishi
Model	SCM50ZJ-S1
Category	Air Conditioner
Language	English