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Troubleshooting
mrcool.com
Unit will not operate
Poor cooling or
heating performance
Indicator lamps
continue flashing
Error code appears
in the indoor unit,
such as: E0,E1,E2....
P1,P2,P3.....
or F1, F2,F3.....
-- Is there a power failure?
-- Has a switch been turned off, a circuit breaker tripped or a fuse blown?
-- Is the timer operating?
-- Are the batteries used in the remote controller exhausted?
-- Are the batteries used in the remote controller loaded properly?
-- Are the air filters dirty?
-- Is air flow unrestricted in & out of indoor & outdoor units?
-- Are the temperature and mode settings correct?
-- Are the windows or doors left opened?
-- Is fan speed on high and louvers allowing maximum flow?
-- Is direct or strong sunlight shinning into the room in cooling operation?
-- Is the SILENCE function is activated? Under SILENCE operation,
noise reduction is prioritized and the air-conditioning performance may
become lower.
--
The unit may stop operation or continue to run in a safety condition
(depending on models). Waiting for about 10 minutes, the fault may be
recovered automatically, if not, disconnect the power and then connect it
in again. If the problem still exists, disconnect the power and contact the
nearest customer service center.
-- Are there other heating apparatus or computers operating, or too many
people in the room in cooling operation?
Symptom
Diagnostic
WARNING
In the case of ANY of the following, turn off the unit
immediately!
· Signal / power cable is damaged or abnormally warm
· Burning odor · Loud or abnormal sounds
· A power fuse or circuit breaker trips frequently
· Water or other objects fall into or out of the unit
DO NOT ATTEMPT TO CORRECT
THESE ITEMS YOURSELF!
CONTACT A SERVICE
PROFESSIONAL IMMEDIATELY
NOTE: If the problem is not resolved, please contact a qualified service professional.
Be sure to inform them of the detailed malfunctions and unit model number.
Before you call to request service assistance, troubleshoot a problem by performing the following checks:
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