E8-00" - Compressor Overcurrent Detection; Ea-00" - 4-Way Valve Abnormality - Daikin FTXJ-M Service Manual

ESIE16-02K | Part 2. Troubleshooting
2.2.2.6. "E8-00" – Compressor overcurrent detection
Trigger
When the compressor is running the cur-
rent exceeds 9.25 A ~ 20 A (depending on
the unit) for 2.5 seconds.
Possible cause
Outdoor temperature is out of operation
range.
Faulty compressor.
Faulty power module.
= Faulty inverter PCB.
Faulty or disturbance of the power supply
(imbalance > 10%). Power drop. Short cir-
cuit.
2.2.2.7. "EA-00" – 4-way valve abnormality
Trigger
The room thermistor / indoor heat
exchanger are not functioning within oper-
ation range.
Possible cause
Faulty 4-way valve coil.
Faulty 4-way valve body, blocked.
Faulty outdoor unit main PCB.
Faulty room thermistor.
Faulty indoor heat exchanger thermistor.
Refrigerant shortage.
Humidity in refrigerant (ice formation in
expansion valve).
Non condensables in refrigerant.
Stop valve is closed.
Faulty stop valve.
31/05/21 | Version 1.1
RA R32 Split & multi split M-Series
Effect
Unit will stop operating.
Check
Check the outdoor temperature.
Check compressor.
Check connections and wiring of the com-
pressor.
Check expansion valve (liquid back
issue).
Check the refrigerant charge. Refer to the
nameplate for correct charge.
Check outdoor inverter PCB.
Check if the HAP LED is blinking in regu-
lar intervals.
Check if the correct spare part is installed.
Check if the power supply is conform with
regulations. No fluctuations in frequency.
Effect
Unit will not stop operating.
Unit will stop operating.
Check
Check 4-way valve coil.
Check 4-way valve body.
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 room thermistor.
Check indoor heat exchanger thermistor.
Check for refrigerant shortage. Refer to
the nameplate for the correct charge.
Check for humidity in the refrigerant.
Check for non condensables in refriger-
ant.
Check stop valve.
Check the stop valve.
2.2. Error based troubleshooting
Reset
Manual reset via user interface.
Corrective action
Wait until the temperature is within opera-
tion range.
Replace compressor when required.
Investigate reason of breakdown.
Replace expansion valve when required.
Fix possible leak.
Restore the power to the outdoor inverter
PCB.
Replace the outdoor inverter PCB when
required.
Adjust power supply when required.
Power reset via outdoor unit.
Reset
Automatic reset when unit runs without
error for 60 minutes.
Manual reset via user interface.
Corrective action
Replace 4-way valve coil when required.
Replace 4-way valve body when required.
Restore the power to the outdoor main
PCB.
Replace outdoor main PCB when HAP
LED is not blinking in regular intervals.
Replace room thermistor when required.
Replace indoor heat exchanger thermistor
when required.
Charge the correct refrigerant amount
when required.
In case of suspicion of humidity, recover,
vacuum and recharge with virgin refriger-
ant.
In case of suspicion of non condensables,
recover, vacuum and recharge with virgin
refrigerant.
Open stop valve when required.
Replace the stop valve when required.
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