J8-00" - Liquid Pipe Thermistor Abnormality; J9-00" - Gas Pipe Thermistor Abnormality - Daikin 2MXM50M Service Manual

ESIE16-02B | Part 2. Troubleshooting
More info:
Check procedures
"Refrigerant thermistors" on page 56
"Main PCB" on page 53
2.2.2.17. "J8-00" – Liquid pipe thermistor abnormality
Trigger
Liquid pipe thermistor detects an abnor-
mal value (open or short circuit).
Possible cause
Faulty outdoor unit main PCB.
Faulty liquid pipe thermistor.
Faulty capacity adapter on outdoor PCB.
More info:
Check procedures
"Main PCB" on page 53
"Refrigerant thermistors" on page 56
2.2.2.18. "J9-00" – Gas pipe thermistor abnormality
Trigger
Thermistor input voltage is > 4.96 V or
< 0.04 V when power is on.
Discharge pipe temperature is lower than
the heat exchanger temperature.
Possible cause
Faulty discharge pipe thermistor.
Faulty outdoor unit main PCB.
More info:
Check procedures
"Refrigerant thermistors" on page 56
"Main PCB" on page 53
4/04/17 | Version 1.1
RA R32 Split & multi split M-Series
Replacing procedures
"Replacing thermistors" on page 87
"Replacing main PCB" on page 84
Effect
Unit will stop operating.
Check
Check if the HAP LED is blinking in regu-
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives
power.
Check liquid pipe thermistor.
Check if the correct adapter is installed.
Check if the correct spare part is installed.
Replacing procedures
"Replacing main PCB" on page 84
"Replacing thermistors" on page 87
Effect
Unit will stop operating.
Check
Check discharge pipe thermistor.
Check if the HAP LED is blinking in regu-
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives
power.
Replacing procedures
"Replacing thermistors" on page 87
"Replacing main PCB" on page 84
2.2. Error based troubleshooting
Reset
Automatic reset.
Corrective action
Adjust the power to the outdoor main
PCB.
Replace outdoor main PCB when HAP
LED is not blinking in regular intervals.
Replace liquid pipe thermistor when
required.
Adjust capacity adapter when required.
Reset
Manual reset via user interface.
Corrective action
Replace discharge pipe thermistor when
required.
Restore the power to the outdoor main
PCB.
Replace outdoor main PCB when HAP
LED is not blinking in regular intervals.
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