Water-cooled Heat Recovery DC Inverter VRF
49
(1) When installing remote monitor or central controller, displacement on indoor units’ project codes should be
set. Otherwise, collision malfunction of the project codes may happen. For detail operation methods, please
refer to the Water-cooled Multi VRF System Installation and Maintenance Manual.
(2) If problem cannot be solved after checking above items, please contact Gree service center and show
phenomena and models.
Following phenomena are not malfunction.
Malfunction
Reason
Unit doesn’t
operate
Unit doesn’t starts up after it is just being 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 generated when just
turned on.
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 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 motor will keep running 20-70s so
as to take good use of excess cooling and
heating and prepare for next operation.
7 Error Indication
Inquiry method of error indication: combine division symbol and content symbol to check the
corresponding error.
Indoor:
Error Code
Content
Error Code
Content
L0
Malfunction of IDU.
d2
Malfunction of lower water
temperature sensor of water tank.
L1
Protection of indoor fan.
d3
Malfunction of indoor ambient
temperature sensor.
L2
Auxiliary heating protection.
d4
Malfunction of refrigerant in-tube
temperature sensor.
L3
Water-full protection
d6
Malfunction of refrigerant out-tube
temperature sensor.
L4
Abnormal power supply for wired
controller.
d7
Malfunction of humidity sensor.
L5
Freeze prevention protection.
d8
Malfunction of water temperature
sensor.
L7
No master IDU.
d9
Malfunction of jumper cap.
L8
Insufficient of power supply.
dA
Web address of IDU abnormal.
L9
For single control over multiple units,
number of IDU is inconsistent.
dH
PCB of wired controller abnormal.
Summary of Contents for GMV-WQ120WM/A-F
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