Troubleshooting Based on Equipment Condition SiBE26-70192 Troubleshooting2.7 Equipment Operates but does not Provide HeatingApplicable Model All models of SkyAir seriesError DetectionMethodError GeneratingConditionPossible Cause Excess charge of refrigerant Air intrudes into refrigerant system Faulty pressure switch Faulty magnetic switch for outdoor unit fan motor Faulty aux. relay for outdoor unit fan motor Soiled heat exchanger of outdoor unit There is an interfering item in air flow of outdoor unit Malfunction of outdoor unit fan Soiled air filter of indoor unit Soiled heat exchanger of indoor unit There is some interfering item in airflow of indoor unit Malfunction of indoor unit fanTroubleshooting*1: For operating current, refer to "Electric characteristics" (on page 9) after checking the fieldsystem combination (indoor + outdoor).Measure the temperature ofsuction air and supply air.Temperature difference =Suction air temp. – Supply airtemp.Wait for a while.No abnormalityNo abnormalityAdditional unit installationshould be consideredGas shortage possiblygenerates trouble.Refer error code “U0”Check refer to Check No . 8on page 180.Check each itemCheck each itemCheck each itemTemperaturedifference for heatingshould be between 14and 30˚C.Is the unitin defrost mode?Is the operationcurrent less than specifiedlevel?∗1Does theheat load increase afterinstallation of theunit?YESYESYESYESYESYES∗ Incorrect selection of model∗ Affection of sunlight∗ Affection of excessive freshair into room∗ Clogged air filter∗ Soiled heat exchanger∗ Malfunction of indoor fanmotor (Refer error code “A6”)∗ Refrigerant overcharge∗ Soiled heat exchanger∗ Short circuit of discharge air∗ Disturbing item in air flow∗ Malfunction of fan motor ofoutdoor unit(Refer error code “E7”, “H7”)∗ Insufficient compression ofcompressor∗ Insufficient circulation ofrefrigerant∗ Faulty expansion valveNONONODoes indoorunit air flowrate down?NOIs the levelof high pressure lowerthan normal level?NONO(S1995)CautionBe sure to turn off power switch before connect or disconnect connector,or parts damage may be occurred.
