Error Indication - Lennox VEPS075N432K User Manual

DC Inverter Multi VRF System
(2) Following circumstances are not malfunctions.
Unit starts up immediately after it is turned
off.
Unit doesn't run.
Power is just turned on.
Mist comes from the
Under cooling.
unit.
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.
Noise is emitted.
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
Unit blows out dust.
time.
Unit emits odor. Under operation.

7 Error Indication

Inquiry method of error indication: combine division symbol and content symbol to check the
corresponding error.
For example, division symbol L and content symbol 4 together means over-current protection.
Indoor
Error
Code
L0 Malfunction of IDU (uniform)
L2 Auxiliary heating protection
L4 Over-current protection
L6 Mode shock
L8 Power supply is insufficient
LA 1-to-more: IDU series is inconsistent
LC Models for IDU and ODU are not matched
d1 Indoor PCB is poor
Malfunction of entry-tube temperature
d4
sensor
d6 Malfunction of exit-tube temperature sensor
d9 Malfunction of jumper cap
dH PCB of wired controller is abnormal
Malfunction of air-outlet temperature
dL
sensor(Fresh air unit)
FP Malfunction of DC motor
J8 High pressure ratio protection of system
JA Protection due to abnormal pressure
Malfunction of inlet temp sensor of gas-liquid
b6
separator
Malfunction of heat exchanger temperature
b9
sensor
P6 Drive IPM module protection of compressor
Malfunction
Content
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
L1 Protection of indoor fan
L3 Water-full protection
L5 Freeze prevention protection
L7 No main IDU
L9 1-to-more: number of IDU is inconsistent
LH Alarm due to bad air quality (Fresh air unit)
Drop protection of discharge temperature sensor of
EC
compressor 1
d3 Malfunction of ambient temperature sensor
d5 Malfunction of middle temperature sensor
d7 Malfunction of humidity sensor
dA Web address of IDU is abnormal
dC Abnormal setting for capacity button
dE Malfunction of indoor CO
J7 Gas-mixing protection of 4-way valve
J9 Low pressure ratio protection of system
JL High-pressure protection
Malfunction of outlet temp sensor of gas-liquid
b7
separator
bH Clock of system is abnormal
Malfunction of drive temperature sensor of
P7
compressor
29
Reason
Content
sensor (fresh air unit)
2