ESIE16-02B | Part 2. Troubleshooting 2.2. Error based troubleshooting
4/04/17 | Version 1.1 Page 25
RA R32 Split & multi split M-Series
2.2.2. Outdoor unit
2.2.2.1. “E1-00” – Outdoor unit PCB abnormality
2.2.2.2. “E3-00” – Discharge pressure abnormality
Trigger Effect Reset
Outdoor main PCB detects that EEPROM
is abnormal.
Unit will stop operating. Manual reset via user interface.
Power reset via outdoor unit.
Possible cause Check Corrective action
Faulty outdoor unit main PCB. 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.
Restore the power to the outdoor main
PCB.
Replace outdoor main PCB when HAP
LED is not blinking in regular intervals.
Faulty capacity adapter on outdoor main
PCB installed.
Check if the correct capacity adapter is
used.
Replace capacity adapter when required.
External factor (e.g. electrical noise)
(cause when error is reset after power
reset, and error happens again after a
while).
Check for source which could cause elec-
trical interference.
Faulty outdoor fan motor. Check the fan motor.
Check fan motor connections and wiring.
Replace fan motor when required.
Adjust wiring when required.
Faulty or disturbance of the power supply
(imbalance > 10%). Power drop. Short cir-
cuit.
Check if the power supply is conform with
regulations. No fluctuations in frequency.
Adjust power supply when required.
Power reset via outdoor unit.
Trigger Effect Reset
Discharge pressure above 4.15 MPa. Unit will stop operating. Automatic reset when high pressure drops
below 3.2 MPa.
Possible cause Check Corrective action
Stop valve is closed. Check stop valve. Open stop valve when required.
Blocked heat exchangers. Are the heat exchangers clean? Clean heat exchangers.
Insufficient airflow. Are the fans operating? Repair fan.
Non condensables in refrigerant. Check for non condensables in refriger-
ant.
In case of suspicion of non condensables,
recover, vacuum and recharge with virgin
refrigerant.
Disconnected HPS wire harness terminal
on the PCB.
Verify connection wire harness terminal
on PCB.
Reconnect the terminal.
Disconnected HPS wire harness terminal
on the HPS.
Verify connection wire harness terminal
on HPS.
Reconnect the terminal(s).
Defective outdoor PCB. Verify resistance of the wire harness ter-
minal on the outdoor PCB.
If nearly 0 Ohm, replace outdoor PCB.
Broken high pressure sensor wire har-
ness.
Verify resistance of the wire harness. If resistance = infinity, replace wire har-
ness.
Defective high pressure switch. Check the resistance of the high pressure
switch.
If resistance = infinity, replace high pres-
sure switch.
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