DeLonghi Split Air Conditioner Owner's Manual page 17

Troubleshooting
Phenomenon
The unit can not run.
Cooling(Heating) efficiency is not good.
Wireless remote control is not available.
If water leakage in the room.
If water leakage in outdoor unit.
Noise from indoor unit emitted.
Breaking off
Troubleshooting
Has the power been shut down?
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Is power plug loosed?
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Is the circuit protection device tripped off or not?
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Is voltage higher or lower?
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(Tested by professionals)
Is the TIMER correctly used?
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Is Temp. setting suitable?
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Were inlet and outlet vents obstructed?
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Is filter dirty?
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Are the windows and doors clothed?
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Did Fan speed set at low speed?
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Is there any heat sources in the room?
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The unit is interfered by abnormal or frequent
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functions switchover occasionally the controller
cannot operate. At this time, you need to pull out
of the plug, and reinsert it.
Is it in its receiving range? Or obstructed?
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To check the voltage in wireless remote control inside
is charged, otherwise to replace the batteries.
Whether the wireless remote control is damaged.
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The air humidity is on the high side.
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Condensing water over flowed.
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The connection position of indoor unit drainage
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pipe is loosed.
When the unit is running in COOL mode, the pipe
●
and connection of pipe would be condensed due
to the water cooled down.
When the unit is running in Auto Defrosting mode
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the ice thawed and flowed out.
When the unit is running in HEAT mode, the water
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adhered on heat exchanger dripped off.
The sound of fan or compressor relay is switching
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on or off.
When the defrosting is started or stop running,
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it will sound. That is due to the refrigerant flowed
to the reverse direction.