62
Following circumstances are not malfunction:
Description
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 1 minute
Mist comes from
the unit
Under cooling
Indoor high humidity air is cooled rapidly
Noise is emitted
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
unit
There is sound when unit starts or stops
That's sound for gas refrigerant stops to
flow
There is slight and consecutive sound when
unit is running or after running
That's sound for operation of drainage
system
Cracking sound is heard when unit is
operating and after operating
That’s sound caused by expansion of
panel and other parts due to temperature
change
The unit blows
out duct
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 motor will keep running 20-70s
so as to take good use of excess cooling
and heating and prepare for 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.
Lennox
VRF Unit
