37MGHAQ: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
34
TROUBLESHOOTING
COMMON ISSUES
Table 19 — Common Issues
NOTE: If problem persists, contact a local dealer or your nearest customer service center. Provide them with a detailed description of the unit
malfunction as well as your model number.
CAUTION
If any of the following conditions occurs, turn off your unit immediately!
• The power cord is damaged or abnormally warm
• You smell a burning odor
• The unit emits loud or abnormal sounds
• A power fuse blows or the circuit breaker frequently trips
• Water or other objects fall into or out of the unit
DO NOT ATTEMPT TO FIX THESE YOURSELF! CON-
TACT AN AUTHORIZED SERVICE PROVIDER
IMMEDIATELY.
ELECTRICAL SHOCK HAZARD
When attempting to access internal electrical components, it is
necessary to shut off the power to the outdoor unit and wait 10 minutes
for the capacitors to fully discharge. Failure to do so could result in
bodily injury or death
WARNING
ISSUE POSSIBLE CAUSE
Unit does not turn on when pressing ON/OFF.
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) indi-
cators are lit up, the outdoor temperature is too cold and the unit’s anti-cold wind is activated
in order to defrost the unit.
In Cooling-only Models: If the “Fan Only” indicator is lit up, the outdoor temperature is too
cold and the unit’s anti-freeze protection is activated in order to defrost the unit.
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 tempera-
ture increases, the unit starts operating in the previously selected mode again.
The set temperature has been reached, at which point the unit turns o the compressor. The
unit continues operating when the temperature fluctuates again.
The indoor unit emits white mist
In humid regions, a large temperature difference between the room’s air and the conditioned
air can cause white mist.
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.
The indoor unit makes 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 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.
The outdoor unit makes noises The unit makes 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 non-use, which emits 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 emit during operations.
The unit’s 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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