
Troubleshooting Tips
Normal functions of the air conditioner
The following occurrences may take place during normal operation:
1. Protection of the Air Conditioner
• Compressor protection - The compressor will not restart for 3-4 minutes after it stops.
• Anti-cold air - When the indoor heat exchanger is in one of the following three situations and the set temperature
has not been reached, the unit is designed not to blow cold air on HEAT mode: (1) Heating has just started, (2) unit is
defrosting, or (3) low temperature heating is occurring.
• Defrosting - Frost may be generated on the outdoor unit during heat cycle when outdoor temperature is low and
humidity is high resulting in lower heating efciency of the air conditioner. When this occurs, the air conditioner will
stop the heating operation and start defrosting automatically. The time to defrost may vary from 4 to 10 minutes
according to the outdoor temperature and the amount of frost built up on the outdoor unit. The indoor or outdoor fan
stops running when defrosting.
2. White mist coming out from the indoor unit
• White mist may appear as a result of a large temperature difference between air inlet and air outlet when the unit is
set on COOL mode in an indoor environment that has a high relative humidity.
• When the air conditioner restarts in HEAT mode operation after defrosting, white mist may occur due to moisture
generated from defrosting process.
3. Low hissing sound
• You may hear a low hissing sound when the compressor is running or has just stopped running. It is the sound of the
refrigerant owing or coming to a stop.
• You can also hear a low squeaking 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 temperature is changing.
• A noise may be heard due to louver restoring to its original position when power is turned on.
4. Dust is blown out from the indoor unit.
• This is normal during rst use of the unit or if the air conditioner has not been used for a long period of time.
5. A peculiar smell comes out of the indoor unit.
• Building material, furniture, or smoke can cause odor to come from the air conditioner.
6. The air conditioner turns to FAN only mode when set in COOL or HEAT mode.
• When the indoor temperature reaches the temperature setting on air conditioner, the compressor will stop
automatically and the air conditioner turns to FAN only mode.
• The compressor will start again when the indoor temperature rises above the set point on COOL mode or falls below
the set point on HEAT mode.
7. The air conditioner runs Anti-mildew function after turning off the unit.
• When turning off the unit in COOL (AUTO COOL, FORCED COOL) and DRY modes, the air conditioner will run the
Anti-mildew function for 7-10 minutes.
• When turning off a unit that has been running on HEAT mode, the unit will continue operating for about 30 seconds at
LOW fan speed, then stop the operation and shut off automatically.
8. Dripping water may generate on the surface of the indoor unit when cooling in a high relatively humidity (higher
than 80%). Adjust the horizontal louver to the maximum air outlet position and select HIGH fan speed.
9. Heating mode
• The air conditioner draws in heat from the outdoor unit and releases it via the indoor unit during heating operation.
• When the outdoor temperature falls, heat drawn in by the air conditioner decreases accordingly.
• At the same time, the heating demand on the air conditioner increases due to larger difference between indoor and
outdoor temperature. If a comfortable temperature cannot be achieved by the air conditioner, we suggest you use a
supplementary heating device.
10. Auto-restart function
• Power failure during operation will stop the unit completely.
• When the power is restored, the unit will restart automatically with all of the previous settings preserved by the
memory function.
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