Manual Whynter MSFS-009H11517-01NE (page 18 of 22) (English)

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OPERATION TIPS

The following events may occur during normal operation:

1. Protection of the air conditioner.

Compressor protection

To prevent damages to the compressor, the compressor will not restart during the protection circuit for about 3

minutes after sudden off operation.

Defrosting

 Frost may be generated on the outdoor unit during heat cycle when outdoor temperature is low and hu-

midity is high resulting in lower heating efficiency of the air conditioner.

 For frost protection, a microcomputer-controlled automatic defrost function is equipped in this air condi-

tioner. If frost forms, the air conditioner will temporarily stop, and start defrosting automatically. The de-

frost indicator light on the indoor unit blinks during this operation.

 When unit is running on Defrost mode, the 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 built up on the outdoor unit.

2. Mist or steam from the indoor unit

 Mist or steam may be generated due to a sudden and large temperature difference between air inlet and

air outlet in COOL or DRY mode. This is common when the relative humidity is high.

 Mist or steam may be generated due to moisture generated from defrosting process in HEAT mode after

defrosting.

3. Noise of the air conditioner

 Air conditioners may make sounds that are not familiar to you. The sounds listed below are normal.

 The compressor may make a pulsating or high-pitched sound.

 Refrigerant flowing may make a gurgling or low hissing sound.

 Fan sound may come from indoor unit.

 In Heat mode, a sizzling sound produced by the automatic defrosting operation may be heard.

4. Dusty air output

 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. Smell coming from the unit

 This is caused by the smell from the interior, such as furniture, building material or cigarette smoke into

the air conditioner.

6. The air conditioner turns to FAN only mode from COOL or HEAT mode.

 When indoor temperature reaches the set temperature, the compressor will stop automatically and the air

conditioner runs in FAN only mode.

 The compressor will start again when the indoor temperature rises above the set temperature in Cool

mode or drops below the set temperature in Heat mode.

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Whynter MSFS-009H11517-01NE Manual

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