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5 Maintenance
5.1 Failures Not Caused by Faults of the AC
(1)
If your air conditioner fails to function normally, please first check the
following items before maintenance:
Problem
If you turn off the unit and then
immediately turn it on, in order
to protect the compressor and
avoid system overload,
compressor will delay running
for 3min.
The air
Wire connection is wrong.
conditioner
can't run.
Fuse or circuit breaker is
broken.
Power failure.
Power plug is loose.
Remote controller has low
battery.
Air inlet and outlet of indoor or
outdoor units have been
Bad
blocked.
cooling or
Improper temperature setting
heating
effect.
Fan speed is too low.
Air flow direction is not right.
Doors or windows are open.
Exposed under direct
sunshine
Bad
Too many heat sources in the
cooling or
room.
heating
Filter is blocked or dirty.
effect.
Air inlets or outlets of the units
are blocked.
DC Inverter U-match Series Cassette Type Unit
Cause
51
Corrective measure
Please wait for a while.
Connect wires according to the
wiring diagram.
Replace the fuse or switch on the
circuit breaker.
Restart after power is resumed.
Re-insert the power plug.
Replace the batteries.
Clear the obstacles and keep the
room for indoor and outdoor units
well ventilated.
Reset a proper temperature.
Reset a proper fan speed.
Change the direction of air louvers.
Close them.
Put on curtains or louvers in front of
the windows.
Remove unnecessary heat
sources.
Send for a professional to clean the
filter.
Clear away obstacles that are
blocking the air inlets and outlets of
indoor and outdoor units.
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