Daikin SA R32 Sky-Air RZAG-L Service Manual

Also see for FCAHG100FVEB: Installation and operation manual Technical data Installer and user reference guide

Contents

Daikin SA R32 Sky-Air RZAG-L Service Manual Manual pdf 41 page image

ESIE16-03B | Part 2. Troubleshooting 2.2. Error based troubleshooting22/08/16 | Version 1.1 Page 41SA R32 Sky-Air RZAG-L2.2.3.3. “U2-00” – Power supply abnormality or instantaneous power failureFaulty 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.Faulty capacity adapter on outdoor PCB. Check if the correct adapter is installed.Check if the correct spare part is installed.Adjust capacity adapter when required.Trigger Effect ResetThere is no zero-cross detected inapproximately 10 seconds (indoor unitPCB).Unit will stop operating. Power reset via outdoor unit.Abnormal voltage drop (< 150-180 V) isdetected by the DC voltage detection cir-cuit.Unit will stop operating. Automatic restart after compressorstand-by of 3 minutes.Abnormal voltage rise is detected by theover-voltage detection circuit.Unit will stop operating. Automatic restart after compressorstand-by of 3 minutes.Possible cause Check Corrective actionFaulty 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.Defective DC voltage detection circuit. Check PCB with DC voltage detection cir-cuit.Replace PCB when required.Defective over-voltage detection circuit. Check PCB with over-voltage detectioncircuit.Replace PCB when required.Defective PAM control part. Check PAM control part. Replace PAM control part when required.Faulty compressor. Check compressor (see "Compressor" onpage 49).Check connections and wiring of the com-pressor.Check expansion valve (liquid back issue)(see "Electronic expansion valve" onpage 50).Check the refrigerant charge. Refer to thenameplate for correct charge.Replace compressor when required (see"Replacing compressor" on page 76).Investigate reason of breakdown.Replace expansion valve when required(see "Replacing expansion valve body" onpage 81).Fix possible leak.Faulty outdoor fan motor. Check the fan motor (see "Fan motor" onpage 52).Check fan motor connections and wiring.Replace fan motor when required (see"Replacing DC fan motor assembly" onpage 79).Adjust wiring when required.Momentary drop of voltage. - Wait until compressor restarts.Momentary power failure. - Wait until compressor restarts.Faulty outdoor unit main PCB. Check if the HAP LED is blinking in regu-lar intervals (see "Main PCB" on page 55).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(see "Replacing main PCB" on page 89).Faulty indoor unit main PCB. Check if the HAP LED is blinking in regu-lar intervals (see "Main PCB" on page 55).Check if the correct spare part is installed.Check if the indoor main PCB receivespower.Restore the power to the indoor mainPCB.Replace indoor main PCB when HAP LEDis not blinking in regular intervals (see"Replacing main PCB" on page 89).Possible cause Check Corrective action