DC Inverter Multi VRF System
29
Error
Code
Content
Error
Code
Content
High pressure ratio protection of system
FU
Malfunction of casing top temperature sensor of
compressor 1
J9 Low pressure ratio protection of system
Fb
Malfunction of casing top temperature sensor of
compressor 2
JA Protection because of abnormal pressure
Fd
Malfunction of exit tube temperature sensor of
mode exchanger
JC Water flow switch protection
Fn
Malfunction of inlet tube temperature sensor of
mode exchanger
JL Protection because high pressure is too low
b1
Malfunction of outdoor ambient temperature
sensor
JE Oil-return pipe is blocked
Malfunction of defrosting temperature sensor 1
Oil-return pipe is leaking
b3 Malfunction of defrosting temperature sensor 2 P0
malfunction of driving board of compressor
(uniform)
b4
Malfunction of liquid temperature sensor of
sub-cooler
P1
Driving board of compressor operates
abnormally (uniform)
b5
Malfunction of gas temperature sensor of
sub-cooler
P2
Voltage protection of driving board power of
compressor (uniform)
b6
Malfunction of inlet temp sensor of gas-liquid
separator
P3
Reset protection of driving module of
compressor
b7
Malfunction of outlet temp sensor of gas-liquid
separator
P4 Drive PFC protection of compressor
Malfunction of outdoor humidity sensor
Over-current protection of inverter compressor
b9
Malfunction of gas temperature sensor of heat
exchanger
P6 Drive IPM module protection of compressor
bA Malfunction of oil-return temperature sensor 1 P7
Malfunction of drive temperature sensor of
compressor
bH Clock of system is abnormal P8
Drive IPM high temperature protection of
compressor
bE
Malfunction of inlet tube temperature sensor of
condenser
P9
Desynchronizing protection of inverter
compressor
bF
Malfunction of outlet tube temperature sensor of
condenser
PA Malfunction of drive storage chip of compressor
bJ
High-pressure sensor and low-pressure sensor
are connected reversely
PH
High-voltage protection of compressor’s drive
DC bus bar
bP Malfunction of temperature sensor of oil-return 2 PC
Drive current detection circuit malfunction of
compressor
bU Malfunction of temperature sensor of oil return 3 PL
Low-voltage protection of compressor’s drive
DC bus bar
Malfunction of temperature sensor of oil return 4
Phase-lacking of inverter compressor
bd
Malfunction of air inlet temperature sensor of
subcooler
PF Drive charging circuit malfunction of compressor
bn
Malfunction of liquid inlet temperature sensor of
subcooler
PJ Failure startup of inverter compressor
Malfunction of driving board of fan (uniform)
AC current protection of inverter compressor
H1
Driving board of fan operates abnormally
(uniform)
PU AC input voltage of drive of inverter compressor
H2
Voltage protection of driving board power of fan
(uniform)
G0 PV reversed connection protection
Reset protection of driving module of fan
PV Anti-islanding protection
Drive PFC protection of fan
PV DC overcurrent protection
Over-current protection of inverter fan
PV power generation overload
Drive IPM module protection of fan
PV leakage current protection
Malfunction of drive temperature sensor of fan
Phase-lacking protection at power grid side
Drive IPM high temperature protection of fan
Phase-lacking protection at power grid side
Desynchronizing protection of inverter fan
HA
Malfunction of drive storage chip of inverter
outdoor fan
G8 Overcurrent protection at power grid side
HH High-voltage protection of fan’s drive DC bus bar G9 Drive IPM module protection at power grid side
HC Drive current detection circuit malfunction of fan GA
Low/high input voltage protection at power grid
side
Low-voltage protection of fan’s drive DC bus bar
Photovoltaic DC\DC protection