TROUBLESHOOTING
PROBLEM
System does not restart.
Indoor unit emits unpleasant odor
when started
You hear a“water flowing”sound.
A thin fog or vapor coming out
of the discharge register when
system is running.
You hear a slight cracking sound
when the system stops or starts.
The system will not run.
The unit is not heating or cooling
adequately.
CAUSE/SOLUTION
Cause:
The system has a built-in three-minute delay to prevent short and/or rapid
cycling of the compressor.
Solution:
Wait three minutes for the protection delay to expire.
Cause:
Typically unpleasant odors are the result of mold or mildew forming on
the coil surfaces or the air filter.
Solution:
Wash indoor air filter in warm water with mild cleaner. If odors persist,
contact a qualified service professional to clean the coil surfaces.
Cause:
It is normal for the system to make“water flowing”or “gurgling”sounds
from refrigerant pressures equalizing when the compressor starts and stops
Solution:
The noises should discontinue as the refrigerant system equalizes after
two or three minutes.
Cause:
It is normal for the system to emit a slight fog or water vapor when
cooling extremely humid warm air.
Solution:
The fog or water vapor will disappear as the system cools and
dehumidifies the room space.
Cause:
It is normal for the system to make “slight cracking” sounds from parts
expanding and contracting during system starts and stops.
Solution:
The noises will discontinue as temperature equalizes after 2 or 3 minutes.
Cause:
There are a number of situations that will prevent the system from running.
Solution:
Check for the following:
• Circuit breaker is “tripped” or “turned off.”
• Power button of controller is not turned on.
• Controller is in sleep mode or timer mode.
• Otherwise, contact a qualified service professional for assistance.
Cause:
There are a number of reasons for inadequate cooling or heating.
Solution:
Check the following:
• Remove obstructions blocking airflow into the room.
• Clean dirty or blocked air filter that is restricting airflow into the system.
• Seal around door or windows to prevent air infiltration into the room.
• Relocate or remove heat sources from the room.
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