HTW IX43R32 Manuel De L'utilisateur page 28

Problem
Both the indoor
When the unit restarts in HEAT mode after defrosting, white mist may be
and outdoor units
emitted due to moisture generated from the defrosting process.
emit white mist
A squeaking sound is heard when the system is OFF or in COOL mode. The
The indoor unit noise is also heard when the drain pump (optional) is in operation.
makes noises
A squeaking sound may occur after running the unit in HEAT mode due to
expansion and contraction of the unit's plastic parts.
A low hissing sound may occur during operation. This is normal and is caused
by refrigerant gas flowing through both the indoor and outdoor units.
Both the indoor
unit and outdoor
A low hissing sound may be heard when the system starts, has just stopped
unit make noises
running or is defrosting. This noise is normal and is caused by the refrigerant
gas stopping or changing direction.
The outdoor unit
The unit will make di erent sounds based on its current operating mode.
makes noises
Dust is emitted from The unit may accumulate dust during extended periods of non-use, which
either the indoor or
will be emitted when the unit is turned on. This can be mitigated by covering
outdoor unit
the unit during long periods of inactivity.
The unit may absorb odors from the environment (such as furniture, cooking,
The unit emits a
cigarettes, etc.) which will be emitted during operations.
bad odor
The unit's filters have become moldy and should be cleaned.
The fan of the
During operation, the fan speed is controlled to optimize product operation.
outdoor unit
does not operate
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Possible Causes