Daikin 2MXM50M Service Manual

Contents

Daikin 2MXM50M Service Manual Manual pdf 25 page image

ESIE16-02B | Part 2. Troubleshooting 2.2. Error based troubleshooting4/04/17 | Version 1.1 Page 25RA R32 Split & multi split M-Series2.2.2. Outdoor unit2.2.2.1. “E1-00” – Outdoor unit PCB abnormality2.2.2.2. “E3-00” – Discharge pressure abnormalityTrigger Effect ResetOutdoor main PCB detects that EEPROMis abnormal.Unit will stop operating. Manual reset via user interface.Power reset via outdoor unit.Possible cause Check Corrective actionFaulty 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 receivespower.Restore the power to the outdoor mainPCB.Replace outdoor main PCB when HAPLED is not blinking in regular intervals.Faulty capacity adapter on outdoor mainPCB installed.Check if the correct capacity adapter isused.Replace capacity adapter when required.External factor (e.g. electrical noise)(cause when error is reset after powerreset, and error happens again after awhile).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 withregulations. No fluctuations in frequency.Adjust power supply when required.Power reset via outdoor unit.Trigger Effect ResetDischarge pressure above 4.15 MPa. Unit will stop operating. Automatic reset when high pressure dropsbelow 3.2 MPa.Possible cause Check Corrective actionStop 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 virginrefrigerant.Disconnected HPS wire harness terminalon the PCB.Verify connection wire harness terminalon PCB.Reconnect the terminal.Disconnected HPS wire harness terminalon the HPS.Verify connection wire harness terminalon 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 pressureswitch.If resistance = infinity, replace high pres-sure switch.