Carrier ROOM AIR CONDITIONER User Manual

Also see for ROOM AIR CONDITIONER: Operating manual Installation guide

Contents

MaintenanceIf you plan to idle the unit for a long time, perform the following:Use a dry cloth to wipe off the dust accumulated on rear air intake grille, in order to avoid the dustblowing out from the indoor unit.Check that the wiring is not broken off or disconnected.Check that the air filter is installed.Check if the air outlet or inlet is blocked after the air conditioner has not been used for a long time.1. Clean the indoor unit and air filter.2. Select FAN only mode, let the indoor fan run for a while to dry the inside of the unit.3. Disconnect the power supply and remove battery from the remote control.4. Check components of the outdoor unit periodically. Contact a local dealer or a customer service centreif the unit requires servicing.Note: Before you clean the air conditioner, be sure to switch the unit off and disconnect the powersupply plug.When the air conditioner is to be used again:OPERATION TIPSThe following events may occur during normal operation.1. Protection of the air conditioner.Compressor protectionThe compressor can't restart for 3 minutes after it stops.Anti-cold air (Cooling and heating models only)The unit is designed not to blow cold air on HEAT mode, when the indoor heat exchanger is inone of the following three situations and the set temperature has not been reached.A) When heating has just starting.B) Defrosting.C) Low temperature heating.The indoor or outdoor fan stop running when defrosting (Cooling and heating models only).Defrosting (Cooling and heating models only)Frost may be generated on the outdoor unit during heat cycle when outdoor temperature is lowand humidity is high resulting in lower heating efficiency of the air conditioner.During this condition air conditioner will stop heating operation and start defrosting automatically.The time to defrost may vary from 4 to 10 minutes according to the outdoor temperature andthe amount of frost buildup on the outdoor unit.2. A white mist coming out from the indoor unitA white mist may generate due to a large temperature difference between air inlet and air outlet onCOOL mode in an indoor environment that has a high relative humidity.A white mist may generate due to moisture generated from defrosting process when the air conditionerrestarts in HEAT mode operation after defrosting.3. Low noise of the air conditionerYou may hear a low hissing sound when the compressor is running or has just stopped running.This sound is the sound of the refrigerant flowing or coming to a stop.You can also hear a low "squeak" sound when the compressor is running or has just stopped running.This is caused by heat expansion and cold contraction of the plastic parts in the unit when the temper-ature is changing.A noise may be heard due to louver restoring to its original position when power is first turned on.Operation Tips29

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