mrcool.com
10
The following events may occur during normal operation, and may not indicate a malfunction.
The protection circuit will prevent the compressor from operating for roughly
3 minutes, after a sudden ON-OFF operation of the power supply, in order
to prevent the unit from being overloaded.
Symptom
Possible Cause
Unit does not turn on
when pressing the
ON/OFF button
The unit changes from
COOL/HEAT mode to
FAN mode
The unit may change its setting to prevent frost from forming on the unit.
Once the temperature increases, the unti will start operating in the
perviously selected mode.
Page 40
The set temperature has been reached, at which point the unit will turn off
the compressor. The unit will continue operating when the temperature
fluctuates again.
The indoor unit emits
a white mist
In humid regions, a large temperature difference between the air with in
the room and the air being emitted from the air conditioner can cause a
white mist.
Both the indoor and
outdoor units emit a
white mist
When the unit restarts in HEAT mode after defrosting, a white mist may be
emitted due to moisture generated from the defrosting process.
The indoor unit makes
noises
A rushing air sound may occur as the louver resets its position
A squeaking sound may occur after running the unit in HEAT mode due to
expansion and contraction of the unit’s plastic parts.
Both the indoor unit
and outdoor unit
make noises
Low hissing sound during operation: This is a normal sound caused by
refrigerant gas flowing through both of the units.
Low hissing sound when system starts, has just stopped running, or is
defrosting: This is a normal sound that is caused by refrigerant gas stopping
or changing direction.
Squeaking sound: Normal expansion and contraction of plastic and metal
parts due to changes in temperatures during operation can cause
squeaking noises.
The outdoor unit
makes noises
The unit will make different sounds based on its current operating mode.
Dust is emitted from
either the indoor or
outdoor unit
The unit may accumulate dust during extended periods of not being used.
This will be emitted when the unit is turned on. This can be prevented by
covering the unit during long periods of inactivity.
The unit emits a bad
odor
The unit may absorb odors from the environment (such as furniture,
cooking, cigarettes, etc.) which will be emitted from the unit during
operations.
The unit’s filter have become moldy and need to be cleaned.
Outdoor unit fan does
not operate
During operation, the fan speed is controlled to optimize product
operation.
Operation is erratic,
unpredictable, or unit
is unresponsive
Interference from cell phone towers and remote boosters may cause the
unit to malfunction. If this should occur, try the following:
--Disconnect the power, then reconnect.
--Press ON/OFF button on the remote control to restart the operation.
