Gree GMV-1015WM/G-U, Service Manual

Page: 205 / 331

Gree GMV6 DC Inverter VRF Units Service Manual
203
Phenomenon Causes
Noise is emitted
When the system is switching
cooling and heating modes; during
heating operation, the unit enters or
quits defrosting operation or oil
return operation, there is “chi
——
”
sound.
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 “sa
——
” sound can be
heard
This is the operation sound of drain system.
When the system is running or after
it stops running, a “creaking” sound
can be heard. This is the sound produced when plastic parts such
as panel expansion and contraction due to
temperature changes.
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 waiting time will vary).
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 refrigerant flowing.
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 heard.
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” sounds.
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
The indoor unit is still
running after shutting
down
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.