Mitsubishi Heavy Industries FDTC40ZHXV Technical Manual page 341

E55
1. Applicable model
FDC 200, 250 types
2. Error detection method
When anoumalous low
temperature (resistance) is
detected by the underneath
temperature thermistor
3. Condition of Error displayed
If the temperature thermistor
detcts -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 underneath
temperature thermistor
connection
• Defective underneath
temperature thermistor
• Defective outdoor control
PCB
Note:
Keeps flashing Stays Off
Keeps flashing 1 time flash
5. Troubleshooting
Diagnosis
318
–
Underneath temperature
thermistor anomaly
(Model FDC200, 250)
–
Countermeasure
Correct connection of
underneath temperature
thermistor connector.
Defective underneath
temperature thermistor
Replace.
Replace outdoor control
PCB.
(Defective underneath
temperature thermistor
input circuit)