Mitsubishi Electric SRK100VNPZJX, Technical Manual

Page: 391 / 509

-
390
-
'12 • PAC-T-174
E37
1. Applicable model
5. Troubleshooting
All models
Diagnosis Countermeasure
Is the
outdoor heat
exchanger temperature
thermistor connector
connected
properly?
YES
Are the
characteristics of
outdoor heat exchanger
temperature
thermistor
OK?
NO
For the characteristics of outdoor heat exchanger
temperature thermistor, see the following graph.
YES
Temperature-resistance characteristics
Temperature thermistor resistance (k
Ω
)
Temperature (°C)
15
10
5
0 10 30 40 20 50
5k
Ω
at 25°C
NO
(Broken wire)
(Short circuit)
Correct connector.
Defective outdoor heat
exchanger temperature
thermistor
➞
Replace.
Defective outdoor control
PCB
➞
Replace.
(Defective outdoor heat
exchanger temperature
thermistor input circuit)
2. Error detection method
Detection of anomalously low
temperature (resistance) on
the outdoor heat exchanger
temperature thermistor
3. Condition of Error displayed
• When the temperature thermistor
detects -50°C or lower for 20
seconds continuously within 2
minutes to 2 minutes 20 seconds
after the compressor ON, the
compressor stops. After 3-minutes
delay, the compressor starts again
automatically, but if this anomalous
temperature is detected 3 times
within 40 minutes.
• When -50°C or lower is detected for 5
seconds continuously within 20 second
after compressor ON.
4. Presumable cause
• Defective outdoor control
PCB
• Broken thermistor harness or
temperature sensing section
• Disconnected wire connection
(connector)
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
Outdoor heat exchanger
temperature themistor anomaly