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Page 15
Issue Possible Causes
The indoor unit
emits noises
A rushing air sound may occur when 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 normal and is
caused by refrigerant gas flowing through both the indoor and
outdoor units.
Low hissing sound when the system starts, has just stopped
running, or is defrosting: This noise is normal and is caused by
the refrigerant gas stopping or changing direction.
Squeaking sound: Normal expansion and contraction of
plastic and metal parts caused by temperature changes during
operation can cause squeaking noises.
The outdoor unit
makes noises
The unit will operate at different sound levels based on its
current operating mode and loading.
Dust is emitted
from either the
indoor or outdoor
unit
The unit may accumulate dust during extended periods of
non-use, which will be emitted when the unit is turned on.
This can be mitigated 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
during operation. Heat exchangers may need to be cleaned.
The unit’s filters have become moldy and should be cleaned.
The fan of the
outdoor unit does
not operate
During the defrost mode, the outdoor fan will be stopped.
Otherwise, check for ice or other debris blocking the fan.
Operation
is erratic,
unpredictable,
or the unit is
unresponsive
Interference from cell phone towers and remote boosters may
cause the unit to malfunction.
In this case, try the following:
• Disconnect the power, and reconnect by resetting the breaker.
• Press ON/OFF button on remote control to restart operation.
NOTE: If problem persists, contact your installer or your nearest customer service center.
Provide them with a detailed description of the unit malfunction, as well as your
model number.
Running the system after realizing a serious performance issue or
observing an error code may cause further and/or irreversible damage to internal
components and loss of the applicable product warranty.
Troubleshooting
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