Detail
code
Division
0
1
2
3
4
5
6
7
8
9
A
C
E
F
H
J
Indoor Unit
A
Malfunction of
indoor unit PCB
Malfunction of
freezing protection
Malfunction
of electronic
expansion valve
Malfunction
of electronic
expansion valve
C
Malfunction of liquid
pipe thermistor for
heat exchanger
Malfunction of gas
pipe thermistor for
heat exchanger
Outdoor Unit
E
Protection devices
activated (unifi ed)
Defect of outdoor
unit PCB
Missing of earth
leakage detection
core
Actuation of high
pressure switch
(HPS)
Actuation of low
pressure switch
(LPS)
Inverter compressor
motor or overheat
STD compressor
motor overcurrent/
lock
Malfunction of
outdoor unit fan
motor system
Overcurrent of
inverter compressor
Malfunction
of electronic
expansion valve coil
F
Malfunction of
discharge pipe
temperature
Abnormal high
pressure actuation
of HPS
H
Malfunction of
sensor system of
compressor
Malfunction of room
temperature sensor
or humidifi er unit
damper
Malfunction of
power supply
sensor
Malfunction of high
pressure switch
(HPS)
Malfunction of low
pressure switch
(LPS)
Malfunction of
compressor motor
overload thermistor
Malfunction of
position detection
sensor
Malfunction of
outdoor unit fan
motor signal
Malfunction of
compressor input
(CT) system
Malfunction
of outdoor air
thermistor
Malfunction of
discharge air
thermistor
Malfunction of (hot)
water temperature
thermistor
J
Miswiring of
thermistor
Malfunction of
pressure sensor
Malfunction of
current sensor of
compressor
Malfunction of
discharge pipe
thermistor
Malfunction of low
pressure equivalent
saturated temperature
sensor system
Malfunction of
suction pipe
thermistor
Malfunction of
heat exchanger
thermistor
Malfunction
of thermistor
(Refrigerant circuit)
Malfunction
of thermistor
(Refrigerant circuit)
Malfunction
of thermistor
(Refrigerant circuit)
Malfunction of high
pressure sensor
Malfunction of low
pressure sensor
L
Malfunction of
inverter system
Malfunction of
inverter PCB
El. compo. box
temperature rise
Malfunction of
inverter radiation fi n
temperature rise
Inverter
instantaneous
overcurrent (DC
output)
Inverter
instantaneous
overcurrent (AC
output)
Total input
overcurrent
Malfunction of
overcurrent inverter
compressor
Malfunction of
inverter compressor
startup error (Stall
prevention)
Malfunction of
power transistor
Malfunction of
transmission
between control
and inverter PCB
P
Shortage of
refrigerant amount
(thermal storage
unit)
Power voltage
imbalance or
inverter PCB
Automatic
refrigerant charge
operation stop
Reactor
temperature
abnormality
Malfunction of
radiation fi n
temperature sensor
Improper
combination
between inverter
and fan driver
System
U
Shortage of
refrigerant
Reverse phase,
open phase
Malfunction of
power supply or
instantaneous
power failure
Check operation
not executed or
transmission error
Malfunction of
transmission
between indoor and
outdoor unit
Malfunction of
transmission
between indoor
unit and remote
controller
Malfunction of
transmission
between indoor
units
Malfunction of
transmission
between outdoor
units or outdoor
storage unit
Malfunction of
transmission
between remote
controllers
Malfunction of
transmission (other
system)
Improper
combination of
indoor and outdoor
units
Malfunction
of setting of
centralized control
equipment address
Malfunction of
transmission
between indoor
unit and centralized
control equipment
Malfunction of
transmission
(accessory device)
Others
7
System No. 2
Compressor
overheat
System No. 2
Compressor
overcurrent
System No. 2
Fan motor
overcurrent
System No. 2
Actuation of high
pressure switch
(HPS)
System No. 2
Actuation of low
pressure switch
(LPS)
System No. 2
Malfunction of low
pressure sensor
System No. 2
Malfunction of high
pressure sensor
System No. 1
Malfunction of fan
inter lock
System No. 2
Malfunction of fan
inter lock
System No. 2
Malfunction of
compressor current
sensor
Malfunction of
pump inter lock
8
Malfunction of
entering water
temperature
thermistor
Malfunction of
leaving water
temperature
thermistor or drain
pipe heater
System No. 1
Malfunction
of refrigerant
thermistor
System No. 2
Malfunction
of refrigerant
thermistor
System No. 1
Malfunction of
heat exchanger
thermistor
System No. 2
Malfunction of
heat exchanger
thermistor
System No. 1
Malfunction of
discharge pipe
thermistor
System No. 2
Malfunction of
discharge pipe
temperature
Malfunction of
brazed-plate heat
exchanger freezing
Malfunction of
dehumidifi cation
or leaving water
temperature
thermistor
System No. 1
Malfunction of
suction pipe
thermistor 1 for
heating
System No. 1
Malfunction of
suction pipe
thermistor 2 for
heating
Abnormal hot water
high temperature
9
Abnormal chilled
water quantity or
abnormal AXP
System No. 2
Malfunction
of electronic
expansion valve
System No. 2
Malfunction of
suction pipe
thermistor
System No. 1
Malfunction of
inverter system
System No. 2
Malfunction of
inverter system
Malfunction of
thermal storage unit
Malfunction of
thermal storage
brine pump
Malfunction of
thermal storage
brine tank
System No. 2
Malfunction of
suction pipe
thermistor 1 for
heating
System No. 2
Malfunction of
suction pipe
thermistor 2 for
heating
Chiller
Detail
code
Division
0
1
2
3
4
5
6
7
8
9
A
C
E
F
H
J
Indoor Unit
A
Malfunction of drain
level system
Malfunction of
freezing protection
Malfunction of
dust collector of air
cleaner
C
Malfunction of liquid
pipe thermistor for
heat exchanger
Malfunction
of suction air
thermistor
Malfunction of
thermostat sensor
in remote controller
System
U
Reverse phase,
open phase
Malfunction of
power supply or
instantaneous
power failure
Check operation
not executed or
transmission error
Malfunction of
transmission
between indoor and
outdoor unit
Malfunction of
transmission
between indoor
unit and remote
controller
Malfunction of
transmission
between indoor
units
Malfunction of
transmission
between outdoor
units or outdoor
storage unit
Malfunction of
transmission
between remote
controllers
Malfunction of
transmission (other
system)
Improper
combination of
indoor and outdoor
units
Malfunction
of setting of
centralized control
equipment address
Malfunction of
transmission
between indoor
unit and centralized
control equipment
M
Malfunction of
central remote
controller PCB
Malfunction of
transmission between
optional controllers for
centralized control
Improper combination
of optional controllers
for centralized control
Address
duplication,
improper setting
Fan Coil
