TROUBLESHOOTING
WARNING
Do not attempt any repairs on the unit yourself. Incorrect repair can cause shock or fire. Always call a
qualified service professional. Using these troubleshooting suggestions can save time when you contact
the qualified service professional.
PROBLEM
CAUSE/SOLUTION
System does not restart.
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.
Indoor unit emits
Cause:
Typically unpleasant odors are the result of mold or mildew forming on the coil
unpleasant odor
surfaces or air filter.
when started
Solution:
Wash indoor air filter in warm water with mild cleaner. If odors persist,
contact a qualified service professional to clean the coil surfaces.
You hear a
Cause:
It is normal for the system to make “water flowing” or “gurgling” sounds from
“water flowing” sound.
refrigerant pressures equalizing when the compressor starts and stops.
Solution:
The noises should discontinue as the refrigerant system equalizes after two or
three minutes.
A thin fog or vapor
Cause:
It is normal for the system to emit a slight fog or water vapor when cooling
coming out of the indoor
extremely humid warm air.
unit when system is
running.
Solution:
The fog or water vapor will disappear as the system cools and
dehumidifies the room space.
You hear a slight cracking
sound when the system
stops or starts.
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 should discontinue as temperature equalizes after two or three
minutes.
The system will not run.
Cause:
There are a number of situations that will prevent the system from running.
Heating or cooling
Solution:
Check for the following:
not running efficiently.
• Circuit breaker is “tripped” or “turned off.”
• Power button of remote is not turned on.
• Batteries in the remote controller are low.
• Remote controller is in sleep mode or timer mode.
• Otherwise, you should contact a qualified service professional for assistance.
The system will not run.
Cause:
With routine maintenance, your system is designed for years of peak efficiency.
Heating or cooling
Solution:
Check the following:
not running efficiently.
• Remove obstructions blocking airflow into the room.
• Clean dirty or blocked indoor air filter that is restricting airflow into the system.
• Seal outdoor air leaks in the room space from door or windows.
• Relocate (if possible) other heating sources in the room space.
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Summary of Contents for MULTI21 CAS12HP230V1AC
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