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Carrier 38MG Owner's Manual page 23

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OPERATION
TIPS
i
f
Maintenance
If you plan to idle the unit for a long time, perform
the following:
Note: Before
supply
1. Clean the indoor unit and air filter.
2. Select the FAN only mode, let the indoor fan run for a while to dry the inside of the unit.
3. Disconnect the power supply and remove the battery from the remote control.
4. Check components of the outdoor unit periodically. Contact a local dealer or a customer service center
if the unit requires servicing.
you clean the air conditioner, be sure to switch the unit off and disconnect the power
plug.
When the air conditioner is to be used again:
• Use a dry cloth to wipe off the dust accumulated on the rear air intake grille, in order to avoid the dust
blowing out from the indoor unit.
• Check that the wiring is not broken off or disconnected.
• Check that the air filter is installed.
• Check if the air outlet or inlet is blocked after the air conditioner has not been used for a long time.
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 yet 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 a heat cycle when the outdoor temperature is low
and humidity is high resulting in laower heating efficiency of the air conditioner,
• During this condition 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 buildup on the outdoor unit.
2. A white mist out of the indoor unit
• A white mist may generate due to a large temperature difference between the air inlet and the air outlet
on the COOL mode in an indoor environment that has a high relative humidity.
• A white mist may generate due to moisture generated from the defrosting process when the air conditioner
restarts in the 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 result 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 temper-
ature is changing,
• A noise may be heard due to a louver restoring to its original position when the power is first turned on.
23

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