Troubleshooting
•
Turn off the main power switch immediately if a malfunction is detected. Contact your
servicing or installing dealer. If the unit continues to run during a malfunction, the unit may
be damaged or electric shock or fire may occur.
• Do not try to move or reposition the units. Please contact the servicing/installing dealer to
repair or move the units.
• Check the following items before contacting the dealer.
WARNING
Improper operation may lead to personal injury or casualty.
27
Ceiling Concealed Unit
Condition
Possible Reason
Unit doesn’t run
When unit is started
immediately after it is just
turned off
Overload protection switch delays unit start up for
three minutes
When power is turned on
The unit is in standby for one minute
Mist comes from the unit
When cooling cycle starts
Indoor high humidity air is cooled rapidly
Sound comes from the unit
Slight cracking sound is heard
when unit starts
This sound occurs when the electronic expansion
valve initializes.
There is sound when cooling
The sound of gas refrigerant flowing in unit
There is sound when unit
starts or stops
This sound occurs when gas refrigerant starts or
stops flowing.
There is slight sound when
unit is running or after running
The sound of the drainage system operating.
Cracking sound is heard when
unit is operating and after
operating
This sound occurs when the unit panels expand or
contract due to temperature change.
The unit blows out dust
When the unit has been off for
a period of time.
Dust in indoor unit is blown out
The unit emits odor
When the unit is operating
The room odor absorbed by the unit is blown out
again
Indoor unit still runs
after switch off
After every indoor unit
receives the "stop" signal, fan
will keep running
Indoor fan motor will keep running 20-70s so as to
use excess cooling and heating and prepare for
the next operation
Mode conflict
COOL or HEAT mode can not
be operated
When the indoor operating mode conflicts with
that of outdoor unit, indoor fault indicator will flash
and conflict will be shown on the wired controller
after 5 minutes. Indoor unit stops to run and
meanwhile change outdoor operating mode as the
same as that of indoor unit, then the unit will go
back to normal. COOL mode doesn't conflict with
DRY mode. FAN mode doesn't conflict with any
mode.
NOTE:
If the problem persists after checking the above items and taking appropriate measures,
please stop operation of the unit immediately and contact your local service agency or dealer.
Diagnostics and repairs should be completed by a professional service technician.
