GMV Heat Recovery DC Inverter VRF
69
“
Malfunction
”
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
Standby operating for about 1 minute
Mist comes from
Under cooling Indoor high humidity air is cooled rapidly
Noise is emitted
Slight cracking sound is heard when
It is noise when electronic expansion valve initialization
There is consecutive sound when
That's sound for gas refrigerant flowing in unit
There is sound when unit starts or
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
Mainboard of
mode exchange
box displays CE
When the mainboard of mode
exchange box has not connected to
communication wire of indoor unit, it
will display CE error code.
Mainboard of mode exchange box may not connect to
communication wire of indoor unit, mainboard that
disconnects to indoor unit will have CE error code, this is
a code for normal status, which will not impact the
operation of unit.
7.2 Error Indication
NOTE!
For specific unit fault and maintenance, please refer to the engineering debugging and after-sales
maintenance manual of DC inverter VRF unit.
—
Content
Content
Indoor
L0 Malfunction of IDU L1 Protection of indoor fan
L2 Auxiliary heating protection L3 Water-full protection
L4
Abnormal power supply for wired
controller
L5 Freeze prevention protection
L8 Power supply is insufficient L9
For single control over multiple
units, number of IDU is inconsistent
(HBS network)
LA
For single control over multiple
units, IDU series is inconsistent
LH Alarm due to bad air quality
LC
IDU is not matching with outdoor
unit
LL Malfunction of water flow switch
LE
Rotation speed of EC DC water
pump is abnormal
LF Malfunction of shunt valve setting
LJ
Setting of functional DIP switch code
LP
Zero-crossing malfunction of PG
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