Lennox VEPS075N432K, User Manual

Page: 36 / 40

DC Inverter Multi VRF System
3 0
Error
Code
Content
Error
Code
Content
P8
Drive IPM high temperature protection of
compressor
P9 Desynchronizing protection of inverter compressor
PH
High-voltage protection of compressor’s
drive DC bus bar
PC
Drive current detection circuit malfunction of
compressor
PL
Low-voltage protection of compressor’s
drive DC bus bar
PE Phase-lacking of inverter compressor
PF
Drive charging circuit malfunction of
compressor
PJ Failure startup of inverter compressor
PP AC current protection of inverter compressor H6 Drive IPM module protection of fan
H7
Malfunction of drive temperature sensor of
fan
H8 Drive IPM high temperature protection of fan
H9 Desynchronizing protection of inverter fan HH High-voltage protection of fan’s drive DC bus bar
HC
Drive current detection circuit malfunction of
fan
HL Low-voltage protection of fan’s drive DC bus bar
HE Phase-lacking of inverter fan HF Drive charging circuit malfunction of fan
HJ Failure startup of inverter fan HP AC current protection of inverter fan
Outdoor
Error
Code
Content
Error
Code
Content
E0 Malfunction of ODU (uniform) E1 High-pressure protection
E2 Discharge low-temperature protection E3 Low-pressure protection
E4
High discharge temperature protection of
compressor
E5
High discharge temperature protection of
compressor 1
F0 Main board of ODU is poor F1 Malfunction of high-pressure sensor
F3 Malfunction of low-pressure sensor F5
Malfunction of discharge temperature sensor of
compressor 1
J1 Over-current protection of compressor 1 b1 Malfunction of outdoor ambient temperature sensor
b2
Malfunction of defrosting temperature
sensor 1
b4
Malfunction of liquid temperature sensor of
sub-cooler
b5
Malfunction of gas temperature sensor of
sub-cooler
P0 Malfunction of driving board of compressor (uniform)
P1
Driving board of compressor operates
abnormally (uniform)
P2
Voltage protection of driving board power of
compressor (uniform)
P3
Reset protection of driving module of
compressor
P4 Drive PFC protection of compressor
P5
Over-current protection of inverter
compressor
H0 Malfunction of driving board of fan (uniform)
H1
Driving board of fan operates abnormally
(uniform)
H2
Voltage protection of driving board power of fan
(uniform)
H3 Reset protection of driving module of fan H4 Drive PFC protection of fan
H5 Over-current protection of inverter fan
— —
Debugging
Error
Code
Content
Error
Code
Content
U0 Preheat time of compressor is insufficient U2 Wrong setting of ODU’s capacity code/jumper cap
U4 Refrigerant-lacking protection U5 Wrong address for driving board of compressor
U6 Alarm because valve is abnormal U8 Short-circuit malfunction of IDU
U9 Malfunction of pipe-line for ODU UC Setting of main IDU is successful
UL Wrong button-dial UE Charging of refrigerant is invalid
C0
Communication malfunction between IDU,
ODU and IDU’s wired controller
C2
Communication malfunction between main control
and inverter compressor driver