Air Handler
25
Following circumstances are not malfunction
Table 17
“Malfunction”
Reason
Unit doesn’t run
When unit is started immediately after it
is just turned off.
Overload protection switch makes it run
after 3 minutes delay.
When power is turned on.
Standby operating for about 1minute
Mist comes from
the unit
Under cooling
Indoor high humidity air is cooled rapidly
The unit emits
noise.
Slight cracking sound is heard when just
turned on.
It is noise when electronic expansion
valve initialization.
There is consecutive sound when
cooling.
That's sound for gas refrigerant flowing
in the unit.
There is sound when unit starts or stops. That's sound for gas refrigerant stops
flowing.
There is slight and consecutive sound
when unit is running or after running.
That's sound for operation of drainage
system.
The unit blows out
dust.
When unit runs after no operation for a
long period.
Dust in indoor unit is blew out.
The unit emits odor. Operating
The room odor absorbed by the unit is
blew out again.
Indoor unit still runs
after switch off.
After every indoor unit receive "stop"
signal, fan will keep running.
Indoor fan can be set as “FAN” or
“AUTO” mode. Under “FAN” mode,
indoor fan will keep running after switch
off the unit.
7. Maintenance and Care
Regular check, maintenance and care should be performed by professional personnel, which
will prolong the unit life span.
7.1 Outdoor Heat Exchanger
Outdoor heat exchanger is required to be cleaned once every two or three months. Use
vacuum cleaner with nylon brush to clean up dust and sundries on the surface of heat exchanger.
Blow away dust by compressed air if it is available. Never use water to wash the heat exchanger.
7.2 Drain Pipe
Regularly check if the drain pipe is clogged in order to drain condensate smoothly.
7.3 Notice before Seasonal Use
(1) Check if the inlet/outlet of the indoor/outdoor unit is clogged.
(2) Check if the ground wire is earthed reliably.
(3)
Check if the filter screen has been set soundly.
(4)
Check if the outdoor unit is installed firmly. If there is something abnormal, please contact
the local appointed service center.
