Lennox VRF VEC027N432U User Manual page 32

Error Code
High discharge temperature protection
E4
of compressor
High discharge temperature protection
E5
of compressor 1
Drop protection of discharge
EC
temperature sensor of compressor 1
Over-current protection of compressor
J1
1
J7 Gas-mixing protection of 4-way valve
J8 High pressure ratio protection of system
J9 Low pressure ratio protection of system
Protection because of abnormal
JA
pressure
Protection because high pressure is too
JL
low
malfunction of driving board of
P0
compressor (uniform)
Driving board of compressor operates
P1
abnormally (uniform)
Voltage protection of driving board
P2
power of compressor (uniform)
Reset protection of driving module of
P3
compressor
P4 Drive PFC protection of compressor
Over-current protection of inverter
P5
compressor
Drive IPM module protection of
P6
compressor
Malfunction of drive temperature sensor
P7
of compressor
Drive IPM high temperature protection
P8
of compressor
Desynchronizing protection of inverter
P9
compressor
High-voltage protection of compressor's
PH
drive DC bus bar
Malfunction of current detection circuit
PC
drive of compressor
Low voltage protection for DC bus bar
PL
of drive of compressor
PE Phase-lacking of inverter compressor
Malfunction of charging loop of driven of
PF
compressor
PJ Failure startup of inverter compressor
AC current protection of inverter
PP
compressor
Low temperature protection for drive
Ed
module
Debugging:
Error Code
Preheat time of compressor is
U0
insufficient
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28
DC Inverter Multi VRF System
Error Code
FP Malfunction of DC motor
Malfunction of outdoor ambient
b1
temperature sensor
Malfunction of defrosting temperature
b2
sensor 1
Malfunction of liquid temperature
b4
sensor of sub-cooler
Malfunction of gas temperature sensor
b5
of sub-cooler
Malfunction of inlet tube temperature
b6
sensor of vapor liquid separator
Malfunction of exit tube temperature
b7
sensor of vapor liquid separator
Malfunction of gas temperature sensor
b9
of heat exchanger
bH Clock of system is abnormal
Malfunction of driving board of fan
H0
(uniform)
Driving board of fan operates
H1
abnormally (uniform)
Voltage protection of driving board
H2
power of fan (uniform)
Reset protection of driving module of
H3
fan
H4 Drive PFC protection of fan
H5 Over-current protection of inverter fan
H6 Drive IPM module protection of fan
Malfunction of drive temperature
H7
sensor of fan
Drive IPM high temperature protection
H8
of fan
Desynchronizing protection of inverter
H9
fan
High-voltage protection of fan's drive
HH
DC bus bar
Malfunction of current detection circuit
HC
of fan drive
Low voltage protection of bus bar of fan
HL
drive
HE Phase-lacking of inverter fan
Malfunction of charging loop of fan
HF
drive
HJ Failure startup of inverter fan
HP AC current protection of inverter fan
Error Code
C4 Malfunction of lack of IDU
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Content