DC Inverter U-match Series Cassette Type Unit
51
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
Cause
Corrective measure
The air
conditioner
can't run.
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.
Please wait for a while.
Wire connection is wrong.
Connect wires according to the
wiring diagram.
Fuse or circuit breaker is
broken.
Replace the fuse or switch on the
circuit breaker.
Power failure.
Restart after power is resumed.
Power plug is loose.
Re-insert the power plug.
Remote controller has low
battery.
Replace the batteries.
Bad
cooling or
heating
effect.
Air inlet and outlet of indoor or
outdoor units have been
blocked.
Clear the obstacles and keep the
room for indoor and outdoor units
well ventilated.
Improper temperature setting
Reset a proper temperature.
Fan speed is too low.
Reset a proper fan speed.
Air flow direction is not right.
Change the direction of air louvers.
Bad
cooling or
heating
effect.
Doors or windows are open.
Close them.
Exposed under direct
sunshine
Put on curtains or louvers in front of
the windows.
Too many heat sources in the
room.
Remove unnecessary heat
sources.
Filter is blocked or dirty.
Send for a professional to clean the
filter.
Air inlets or outlets of the units
are blocked.
Clear away obstacles that are
blocking the air inlets and outlets of
indoor and outdoor units.
