Qlima S5025 Operating Manual page 32

3. The outdoor unit requires periodic maintenance and cleaning. This should only be done by an author-
ized airconditioning engineer.
Checks before operation
• Check that the wiring is not broken or disconnected.
• Check that the air filter is installed.
• Check if the air outlet or inlet is not blocked after the air conditioner has not been used for a long time.
CAUTION
• Do not touch the metal parts of the unit when removing the filter. Injuries can occur when
handling sharp metal edges.
• Do not use water to clean inside the air conditioner. Exposure to water can destroy the
insulation, leading to possible electric shock.
• When cleaning the unit, first make sure that the power and circuit breaker are turned off.
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OPERATION TIPS
The following events may occur during normal operation.
1. Protection of the air conditioner.
Compressor protection
• The compressor cannot restart for 3 minutes after it stops.
Anti-cold air
• The unit is designed not to blow cold air on HEAT mode, when the indoor heat exchanger is in one
of the following three situations and the set temperature has not been reached.
A. When heating has just started.
B. Defrosting.
C. Low temperature heating.
Defrosting
• The indoor or outdoor fan stops running when 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 efficiency of the air conditioner.
• During this condition air conditioner will stop heating operation periodically 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 buildup on the outdoor unit.
2. A white mist coming out from the indoor unit.
• A white mist may generate due to a large temperature difference between air inlet and air outlet on
COOL 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 condi-
tioner restarts in HEAT mode operation after defrosting.
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3. Low noise of the air conditioner.
• You 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 run-
ning. This is caused by heat expansion and cold contraction of the plastic parts in the unit when the
temperature is changing.
• A sound may be heard due to louver restoring to its original position when power is first turned on.
4. Dust is blown out from the indoor unit.
• This is a normal condition when the air conditioner has not been used for a long time or during first
use of the unit.
5. A peculiar smell comes out from the indoor unit.
• This is caused by the indoor unit giving off smells permeated from building material, from furniture,
or smoke.
6. The air conditioner turns to FAN only mode from COOL or HEAT mode.
• When 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 on COOL mode or falls on HEAT mode to the set point.
7. Dripping water may generate on the surface of the indoor unit when cooling in a high relatively
humidity (relative humidity higher than 80%). Adjust the horizontal louver to the maximum air out-
let position and select HIGH fan speed.
8. Heating mode.
• The air conditioner draws in heat from the outdoor unit and releases it via the indoor unit dur-
ing heating operation. When the outdoor temperature falls, heat drawn in by the air conditioner
decreases accordingly and the heating capacity will decrease. At the same time, heat loading of the
air conditioner increases due to larger difference between indoor and outdoor temperature. If a com-
fortable temperature cannot be achieved by the air conditioner, it is advised to use a supplementary
heating device.
9. Auto-restart function.
• Power failure during operation will stop the unit completely.
The air conditioner is equipped with Auto-restart feature, when the power restores, the unit restarts
automatically with all the previous settings preserved by the memory function.
10. Refrigerant leak detection.
• The air conditioner is provided with a Refrigerant leak detection system.
When the outdoor unit detects a shortage of refrigerant, the air conditioner will stop and the indoor
unit shows the alarm EC on the display.
When this alarm occurs, do not restart the air conditioner and contact your supplier.
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