Gree Ultra Heat GMV Multi VRF Series Owner's Manual page 61

Following circumstances are not malfunction.
"Malfunction"
When unit is started immediately after it
is just turned off
Unit doesn't run
When power is turned on
Mist comes from the
Under cooling
unit
Slight cracking sound is heard when
just turned on
There is consecutive sound when
cooling
There is sound when unit starts or
Noise is emitted stops
There is slight and consecutive sound
when unit is running or after running
Cracking sound is heard when unit is
operating and after operating
The unit blows out When unit runs after no operation for a
duct long period
The unit emits odor Operating
Indoor unit still runs After every indoor unit receive "stop"
after switch off signal, fan will keep running
COOL or HEAT mode cannot be
Mode conflict
operated
Ultra Heat GMV Multi VRF_Heat Recovery Serial
Overload protection switch makes it run after 3
minutes delay
Standby operating for about 1 minute
Indoor high humidity air is cooled rapidly
It is noise when electronic expansion valve
initialization
That's sound for gas refrigerant flowing in unit
That's sound for gas refrigerant stops to flow
That's sound for operation of drainage system
That's sound caused by expansion of panel and
other parts due to temperature change
Dust in indoor unit is blew out
The room odor absorbed by the unit is blew out again
Indoor fan motor will keep running 20-70s so as to
take good use of excess cooling and heating and
prepare for next operation
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.
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Reason