DC Inverter U-Match Series Cassette Type Unit
48
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 control 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.
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.
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