GMV DC Inverter VRF
64
● Following circumstances are not malfunctions.
Phenomenon Causes
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
When the power supply is connected,
there is small “dada” sound.
It is the sound of startup action of electronic expansion
valve.
When the system is conducting cooling ,
defrosting or oil return, there is
——
This is the sound of refrigerant flowing inside the unit.
When the system is switching cooling
and heating modes; during heating
operation, the unit enters or quits
defrosting operation or oil return
——
This is the sound for direction reversal of 4-way valve.
When the system is started or stopped
for a short time, you can hear the sound
of “sa
——
”; you can also hear this sound
for a short time after the start or stop of
the defrosting operation.
This is the sound produced when the refrigerant stops or
changes the flow.
When the system is in cooling operation
or after it stops running, a continuous
——
This is the operation sound of drain system.
When the system is running or after it
stops running, a “creaking” sound can
This is the sound produced when plastic parts such as
panel expansion and contraction due to temperature
When the system is in heating operation,
after the indoor unit stops running, the
sound like running water can be heard.
The unit is melting the frost on the outdoor unit, please
wait about 10 minutes (due to different unit models, the
Noise is emitted
When the indoor unit stops running, a
faint “sa
——
” sound or “gurgling” sound
can be heard.
This sound can be heard when other indoor units are
running. This is to prevent oil and refrigerant from staying
in the indoor unit, and to keep a small amount of
When the unit is running, the operating
sound of the compressor changes.
This is caused by changes in compressor operating
frequency.
During the operation of the unit or after
the operation is started or stopped, a
continuous “sa
——
” sound can be
This is the sound produced when the refrigerant bypass
valve operates.
When the operating mode of the unit
changes, the indoor unit and outdoor
unit will produce “sa
——
” and “gurgling”
This is the sound produced when the refrigerant stops or
changes flow.
The sound from the outdoor unit can be
heard indoors
This is because the outdoor unit is installed close to the
window or wall, and the sound insulation is poor, and the
external noise is transmitted in.
There is dust blowing out
from the unit
Start operation after it is not used for a
long time
Dust in indoor unit is blew out
The unit emits odor Operating
The odor of the air conditioner is sucked into the room
and then blown out
running after shutting
The indoor unit is still running after
shutting down
The fan of indoor unit will continue to work for 20 to 70
seconds to fully use the residual cooling or heat of the
heat exchanger, and to prepare for the next use.
Mode conflict Cooling or heating mode cannot start up
When the selected operation mode of the indoor unit
conflicts with the operation mode of the outdoor unit,
after five seconds, the indoor unit error indicator flashes
or the remote controller displays the operation conflict,
and the indoor unit shuts down. At this time, the indoor
unit can be converted to run with the outdoor unit. The
mode can be restored to normal without conflict. The
cooling mode and dry mode do not conflict, and the air
supply does not conflict with any mode.
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