3.5 Failures Not Caused by Errors
(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.
Thermostat has low battery.
Replace the batteries.
Bad cooling or heating
effect.
Air inlet and outlet of the units have been blocked.
Clear the obstacles and keep the room for the 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 the units.
SERVICE MANUAL
53
Summary of Contents for Inverter FLEX24 DEV24H2R18
Page 9: ...6 SERVICE MANUAL 2 Control 2 1 Operation Mode 2 1 1 Cooling Mode ...
Page 10: ...2 1 2 Heating Mode SERVICE MANUAL 7 ...
Page 19: ...Model DEV48H2R18 DEV60H2R18 16 SERVICE MANUAL ...
Page 27: ...SEV2040H2R18 SEV4060H2R18 24 SERVICE MANUAL ...
