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A5HL5-SF-1A-EN
Troubleshooting
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The following symptoms are not a malfunction and in most situations will not require repairs:
Table 10. Common Problems
Problem Possible Cause
Abnormal noises of outdoor unit The unit will make different sounds based on its current operating mode.
Both the indoor and outdoor units make noises
The outdoor may hum during operation. This is a normal phenomenon,
which is caused by refrigerant gas flowing through the indoor and outdoor
units.
When the unit is turned on, and just stopped or defrosted, a hiss may be
heard. This noise is normal and is caused by refrigerant gas stopping or
turning.
Unit does not turn on when pressing ON/ OFF button
The unit has a 3-minute protection feature that prevents the unit from
overloading. The unit cannot be restarted within three minutes of being
turned off.
Cooling and Heating Models: If the Operation light and PRE-DEF (Pre-
heating/ Defrost) indicators are lit up, the outdoor temperature is too cold
and the unit's anti-cold wind is activated in order to defrost the unit.
The unit changes from COOL mode to FAN mode
The unit changes its setting to prevent frost from forming on the unit. Once
the temperature increases, the unit will start operating again.
The set temperature has been reached, at which point the unit turns off the
compressor. The unit will resume operating when the temperature
fluctuates again.
Both the indoor and outdoor units emit white mist
When the unit restarts in HEAT mode after defrosting, white mist may be
emitted due to moisture generated from the defrosting process.
Dust is emitted from either the indoor or outdoor unit
The unit may accumulate dust during extended periods of nonuse, 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 operations.
The unit filters have become moldy and should be cleaned.
The fan of the outdoor unit does not operate During operation, the fan speed is controlled to optimize product operation.
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