Manual Carrier 42hqe012 allegro plus (page 13 of 15) (English)

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Operation tips

The following events may occur during normal operation.

1. Protection of the air conditioner.

Compressor protection

• The 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 in one 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 low and 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 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 conditioner restarts in HEAT

mode operation after defrosting.

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 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 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 (For cooling and heating models only) 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 (For cooling and

heating models only) 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 outlet position

and select HIGH fan speed.

8. Heating mode

(For cooling and heating models only)

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, heat loading of the air conditioner increases

due to larger difference between indoor and outdoor temperatu-

re. If a comfortable temperature can't be achieved by the air

conditioner, we suggest you use a supplementary heating

device.

9. Auto-restart function

Power failure during operation will stop the unit completely.

For the unit without Auto-restart feature, when the power

restores, the OPERATION indicator on the indoor unit starts

flashing. To restart the operation, push the ON/OFF button on

the remote controller.

For the unit with Auto-restart feature, when the power restores,

the unit restarts automatically with all the previous settings

preserved by the memory function.

10.Lightning or a car wireless telephone operating nearby

may cause the unit to malfunction.

Disconnect the unit with power and then re-connect the unit

with power again.

Push the ON/OFF button on the remote controller to restart

operation.

42HQE009. / 012.

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Carrier 42hqe012 allegro plus Manual

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