Lennox VEPS075N432K User Manual page 36

Error
Code
Drive IPM high temperature protection of
P8
compressor
High-voltage protection of compressor's
PH
drive DC bus bar
Low-voltage protection of compressor's
PL
drive DC bus bar
Drive charging circuit malfunction of
PF
compressor
PP AC current protection of inverter compressor
Malfunction of drive temperature sensor of
H7
fan
H9 Desynchronizing protection of inverter fan
Drive current detection circuit malfunction of
HC
fan
HE Phase-lacking of inverter fan
HJ Failure startup of inverter fan
Outdoor
Error
Code
E0 Malfunction of ODU (uniform)
E2 Discharge low-temperature protection
High discharge temperature protection of
E4
compressor
F0 Main board of ODU is poor
F3 Malfunction of low-pressure sensor
J1 Over-current protection of compressor 1
Malfunction of defrosting temperature
b2
sensor 1
Malfunction of gas temperature sensor of
b5
sub-cooler
Driving board of compressor operates
P1
abnormally (uniform)
Reset protection of driving module of
P3
compressor
Over-current protection of inverter
P5
compressor
Driving board of fan operates abnormally
H1
(uniform)
H3 Reset protection of driving module of fan
H5 Over-current protection of inverter fan
Debugging
Error
Code
U0 Preheat time of compressor is insufficient
U4 Refrigerant-lacking protection
U6 Alarm because valve is abnormal
U9 Malfunction of pipe-line for ODU
UL Wrong button-dial
Communication malfunction between IDU,
C0
ODU and IDU's wired controller
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Error
Code
P9 Desynchronizing protection of inverter compressor
Drive current detection circuit malfunction of
PC
compressor
PE Phase-lacking of inverter compressor
PJ Failure startup of inverter compressor
H6 Drive IPM module protection of fan
H8 Drive IPM high temperature protection of fan
HH High-voltage protection of fan's drive DC bus bar
HL Low-voltage protection of fan's drive DC bus bar
HF Drive charging circuit malfunction of fan
HP AC current protection of inverter fan
Error
Code
E1 High-pressure protection
E3 Low-pressure protection
High discharge temperature protection of
E5
compressor 1
F1 Malfunction of high-pressure sensor
Malfunction of discharge temperature sensor of
F5
compressor 1
b1 Malfunction of outdoor ambient temperature sensor
Malfunction of liquid temperature sensor of
b4
sub-cooler
P0 Malfunction of driving board of compressor (uniform)
Voltage protection of driving board power of
P2
compressor (uniform)
P4 Drive PFC protection of compressor
H0 Malfunction of driving board of fan (uniform)
Voltage protection of driving board power of fan
H2
(uniform)
H4 Drive PFC protection of fan
— —
Error
Code
U2 Wrong setting of ODU's capacity code/jumper cap
U5 Wrong address for driving board of compressor
U8 Short-circuit malfunction of IDU
UC Setting of main IDU is successful
UE Charging of refrigerant is invalid
Communication malfunction between main control
C2
and inverter compressor driver
30
DC Inverter Multi VRF System
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