Daikin FTXS09DVJU Service Manual

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Contents

Daikin FTXS09DVJU Service Manual Manual pdf 150 page image

SiUS04-702 TroubleshootingService Diagnosis 1394.11 Four Way Valve Abnormality4.11.1 09/12 ClassRemoteControllerDisplayEAMethod ofMalfunctionDetectionThe indoor air temperature thermistor, the indoor unit heat exchanger thermistor, the outdoortemperature thermistor and the outdoor unit heat exchanger thermistor are checked to see if theyfunction within their normal ranges in the operating mode.MalfunctionDecisionConditionsA following condition continues over 10 minutes after operating 5 minutes. Cooling / dry operation(room temp. – indoor heat exchanger temp.) < –∆9°F Heating(indoor unit heat exchanger temp. – room temp.) < –∆9°FSupposedCauses Connector in poor contact Thermistor defective Outdoor unit PCB defective Four way valve coil or harness defective Four way valve defective Foreign substance mixed in refrigerant Insufficient gas