Daikin 2MXM50M Service Manual

Contents

Daikin 2MXM50M Service Manual Manual pdf 31 page image

ESIE16-02B | Part 2. Troubleshooting 2.2. Error based troubleshooting4/04/17 | Version 1.1 Page 31RA R32 Split & multi split M-Series2.2.2.12. “H8-00” – Compressor input (CT) system abnormality2.2.2.13. “H9-00” – Outdoor air temperature thermistor abnormalityFaulty outdoor inverter PCB. Check outdoor inverter PCB.Check if the HAP LED is blinking in regu-lar intervals.Check if the correct spare part is installed.Restore the power to the outdoor inverterPCB.Replace the outdoor inverter PCB whenrequired.Stop valve is closed. Check stop valve. Open stop valve 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 ResetDC voltage or DC current sensor abnor-mality based on the compressor runningfrequency and the input current.Unit will not stop operating. Automatic reset when compressor runsnormally for 60 minutes.Unit will stop operating if the warningoccurs several times.Manual reset via user interface.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 power module.Input current or compressor current toolow.Faulty outdoor inverter PCB.Check outdoor inverter PCB.Check if the HAP LED is blinking in regu-lar intervals.Check if the correct spare part is installed.Restore the power to the outdoor inverterPCB.Replace the outdoor inverter PCB whenrequired.Faulty compressor. Check compressor.Check connections and wiring of the com-pressor.Check expansion valve (liquid backissue).Check the refrigerant charge. Refer to thenameplate for correct charge.Replace compressor when required.Investigate reason of breakdown.Replace expansion valve when required.Fix possible leak.Faulty reactor. Check reactor. Replace reactor when required.Trigger Effect ResetThermistor input voltage is > 4.96 V or< 0.04 V when power is on.Unit will stop operating. Manual reset via user interface.Possible cause Check Corrective actionFaulty outdoor air temperature thermistor. Check outdoor temperature thermistor. Replace outdoor temperature thermistorwhen required.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 receivespower.Restore the power to the outdoor mainPCB.Replace outdoor main PCB when HAPLED is not blinking in regular intervals.Possible cause Check Corrective action