(2) Following circumstances are not malfunctions.
Unit doesn't run.
Mist comes from
the unit.
Noise is emitted.
Unit
blows
out
dust.
Unit emits odor.
7 Error Indication
Inquiry method of error indication: combine division symbol and content symbol to check
the corresponding error.
Indoor:
Error Code
L0
L1
L2
L3
L4
L5
L6
L7
L8
L9
LA
LH
LC
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Malfunction
Unit starts up immediately after it is
turned off.
Power is just turned on.
Under cooling
Slight cracking sound is heard when
unit is just turned on.
There is consecutive sound when
cooling.
There is sound when unit starts or
stops.
There is slight and consecutive sound
when unit is running or after running.
Cracking sound is heard when unit is
running or after running.
Unit starts up after not operating for a
long time.
Under operation
Content
Malfunction of IDU (uniform)
Protection of indoor fan
Auxiliary heating protection
Water-full protection
Abnormal power supply for wired
controller
Freeze prevention protection
Mode shock
No main IDU
Power supply is insufficient
1-to-more: number of IDU is
inconsistent
t1-to-more: IDU series is
inconsistent
Alarm due to bad air quality (Fresh
air unit)
IDU is not matching with outdoor unit
DC Inverter Multi VRF System User Manual
Overload protection switch makes it run after a
3-min delay.
Standby operation lasts for about 1min.
Indoor air with high humidity is cooled rapidly.
It is the noise when electronic expansion valve is
initialized.
It is the sound for gas refrigerant flowing in the
unit.
It is the sound when gas refrigerant stops flowing.
This is the sound of drainage operation.
This is the sound caused by the expansion of
panel and other parts of the unit due to
temperature change.
Dust in indoor unit is blown out.
Unit absorbs the room odor and then blows it out.
Error Code
d1
Malfunction of ambient temperature
d3
Malfunction of entry-tube
d4
Malfunction of middle temperature
d5
Malfunction of exit-tube temperature
d6
Malfunction of humidity sensor
d7
d9
Malfunction of jumper cap
dA
Web address of IDU is abnormal
dH
PCB of wired controller is abnormal
Setting capacity of DIP switch code
dC
Malfunction of air outlet temperature
dL
dE
Malfunction of indoor CO
db
34
Reason
Content
Indoor PCB is poor
sensor
temperature sensor
sensor
sensor
is abnormal
sensor
sensor
2
Debugging status