Carrier 42QH30-H Service Maintenance Manual

Contents

20TROUBLE CHART (Cont.)TROUBLE REASON ACTIONRemote control batteries are exhausted. Replace batteries.Remote control has not been pointedcorrectly to the receiver of indoor unit.Turn remote control OFF and repeat theoperation in the correct direction.There are obstacles (curtains, walls, etc.)between the remote control and theindoor unitRepeat the operation after having removedthe obstacles.Receiver on the indoor unit or the remotecontrol is under intense sun radiation.Avoid direct sun on the unit, shut curtains orshades.When pressing stop button, unit doesnot acknowledge signal with a beep.Signal transmission is obstructed bysevere interference from anelectromagnetic field.Avoid sending signals when computers orhousehold appliances (Food processors,coffee makers, etc.) are operating close bycellular or cordless telephones may alsointerfere with the control.Main switch is OFF. Switch it to ON position.Remote control batteries are exhausted. Replace batteries.Remote control has not been pointedcorrectly to the receiver of indoor unit.Turn remote control OFF and repeat theoperation in the correct direction.There are obstacles (curtains, walls, etc.)between the remote control and theindoor unitRepeat the operation after having removedthe obstacles.Receiver on the indoor unit or the remotecontrol is under intense sum radiation.Avoid direct sun on the unit, shut curtains orshades.When pressing any function button,the remote control shows the functionrequested on the display, but unitdoes not acknowledge signal receiptwith a beep and does not carry out thefunction.Signal transmission is obstructed bysevere interference from anelectromagnetic field.Avoid sending signals when computers orhousehold appliances (Food processors,coffee makers, etc.) are operating close bycellular or cordless telephones may alsointerfere with the control.Main supply switch is OFF Switch to ONFuses or main switch are blown Replace fusesProtection against frequent compressorcycling is ONWait for 3 minutes.Air conditioner will not start.Selected temperature is higher than theroom temperature in the cooling mode (orlower in the heating mode).Correct selected temperature.Air flow cannot circulate freely Remove obstructions.Dirty filters reduce air quantity circulating. Clean air filtersDoors and/or windows are open. Close doors and windowsFan speed has been set to “Low” Set fan speed at high speed.Air flow direction is not correct Adjust airflow direction as per the modechosen.Air conditioner is not supplyingenough cooling.Selected temperature is higher than theroom temperature in the cooling mode.Correct selected temperature.

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