Mitsubishi Electric SRK100VNPZJX, Technical Manual

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'12 • PAC-T-174
E53
1. Applicable model
5. Troubleshooting
All models Diagnosis Countermeasure
YES
NO
Are the
characteristics of suction pipe
temperature thermistor OK?
YES
Is the connection
of suction pipe temperature thermistor
connector OK?
NO
Temperature-resistance characteristics
Temperature thermistor resistance (k
Ω
)
Temperature (°C)
15
10
5
0 10 30 40 20 50
5k
Ω
at 25°C
(Broken wire)
(Short circuit)
Correct connection of
suction pipe temperature
thermistor connector.
Defective suction pipe
temperature thermistor
➞
Replace.
Defective outdoor control
PCB
➞
Replace.
(Defective suction pipe
temperature thermistor
input circuit)
2. Error detection method
When the suction pipe
temperature thermistor detects
anomalously low temperature
3. Condition of Error displayed
If the temperature thermistor
detects -50°C or lower for 5
seconds continuously within
10 minutes to 10 minutes 20
seconds after compressor ON,
the compressor stops. When
the compressor is restarted
automatically after 3-minutes
delay, if this anomaly ocuurs 3
times within 40 minute.
4. Presumable cause
• Defective suction pipe
temperature thermistor
connection
• Defective suction pipe
temperature thermistor
• Defective outdoor control
PCB
Note:
Error code
Remote controller:
LED Green Red
Outdoor control PCB
Outdoor inverter
PCB
1 time flash Keeps flashing
Yellow LED or Red LED Green LED
Indoor control PCB Stays OFF Keeps flashing
Keeps flashing
Content
Keeps flashing
Suction pipe temperature
thermistor anomaly