Simple Self-Diagnosis by Malfunction Code
Simple Self-Diagnosis by Malfunction Code
Detail
code
Others
System
Outdoor Unit
Indoor Unit
Division
A
C
E
F
H
J
L
P
U
M
6
7
8
9
0
1
2
3
4
5
6
7
8
9
A
C
After Sales Service Division
(SM-TS2)
E
F
H
J
External
Malfunction of
protection
indoor unit PCB
device activated
Malfunction of
drain level
system
Malfunction of
freezing
protection
High pressure
Malfunction of
control in
fan motor
heating, freezeup protection
control in cooling
Malfunction of
Malfunction of
Malfunction of
Heater overheat Stop due to low
swing flap motor power supply or electronic
water level
AC input
expansion valve
overcurrent
Low water level · Malfunction of a Malfunction of
no water supply humidifier
dust collector of
system
air cleaner
Malfunction of
capacity setting
(Indoor unit
PCB)
Malfunction of
sensor system
(unified)
Failure of
transmission
(between indoor
unit PCB and
sub PCB)
Malfunction of
drain level
sensor
Malfunction of
liquid pipe
thermistor for
heat exchanger
Malfunction of
gas pipe
thermistor for
heat exchanger
Front panel
driving motor
fault
Malfunction of
thermostat
sensor in
remote
controller
Protection
devices
activated
(unified)
Defect of
outdoor unit
PCB
Actuation of
high pressure
switch (HPS)
Actuation of low Inverter
pressure switch compressor
(LPS)
motor or
overheat
STD
Malfunction of
compressor
outdoor unit fan
motor
motor system
overcurrent/lock
Malfunction of
discharge pipe
temperature
Malfunction of
suction pipe
thermistor
Abnormal high
pressure or
refrigerant
overcharged
Malfunction of
low pressure
switch (LPS)
Malfunction of
cold room
thermistor
Malfunction of
sensor system
of compressor
Malfunction of
Malfunction of
room temperature power supply
sensor or
sensor
humidifier unit
damper
Malfunction of
high pressure
switch (HPS)
Miswiring of
thermistor
Malfunction of
Malfunction of
pressure sensor current sensor
of compressor
Malfunction of
discharge pipe
thermistor
Malfunction of
inverter system
Malfunction of
inverter PCB
Malfunction of
fan motor
sensor or fan
control driver
Malfunction of
Malfunction of
AC input current suction air
sensor system
thermistor
Malfunction of
discharge air
thermistor
Malfunction of
humidity sensor
system
Malfunction of
switch box
thermistor
Overcurrent of
inverter
compressor
Malfunction of
four way valve
or cool/heat
switching
Malfunction of
entering water
temperature
Malfunction of
Malfunction of
drain water level thermal storage
unit
Malfunction of
cooling water
pump
Actuation of
option
protection
device
Abnormal high
pressure
actuation of
HPS
Abnormal low
pressure
Abnormal oil
pressure
Abnormal high
temperature of
refrigerant oil
Abnormal
exhaust
temperature of
engine
Malfunction of
electronic
expansion valve
coil
Abnormal oil
level or
shortage of oil
Malfunction of
compressor
motor overload
thermistor
Malfunction of
Malfunction of
position
outdoor fan
detection sensor motor signal
Malfunction of
compressor
input (CT)
system
Malfunction of
outdoor air
thermistor
Malfunction of
discharge air
thermistor
Malfunction of
(hot) water
temperature
thermistor
Malfunction of
Alarm in thermal High room
drain water level storage unit or
temperature
sensor
storage
alarm
controller
Malfunction of
thermal storage
tank water level
Malfunction of
low pressure
equivalent
saturated
temperature
sensor system
Electrical box
Malfunction of
temperature rise inverter
radiating fin
temperature rise
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
Malfunction of
oil pressure
sensor or subtank thermistor
Inverter
instantaneous
overcurrent (DC
output)
Inverter
instantaneous
overcurrent (AC
output)
Total input
overcurrent
Malfunction of
overcurrent
inverter
compressor
Malfunction of
Malfunction of
inverter
power transistor
compressor
startup error
(Stall prevention)
Automatic
refrigerant
charge
operation
completed
Malfunction of
oil level sensor
or heating heat
exchanger
thermistor
Malfunction of
oil temperature
thermistor
Malfunction of
engine room
temp. sensor or
exhaust temp.
Malfunction of
Malfunction of
transmission
igniter system
between control
and inverter
PCB
Engine startup
error
Malfunction of
generator
converter
Engine stop
Refrigerant
cylinder during
automatic
refrigerant
charging
Refrigerant
cylinder during
automatic
refrigerant
charging
Malfunction of
Refrigerant
starter actuation cylinder during
automatic
refrigerant
charging
Improper
combination
between
inverter and fan
driver
Malfunction of
setting of
centralized
controller
address
Automatic
refrigerant
charge
operation nearly
completed
Malfunction of
transmission
between indoor
unit and
centralized
controller
Wiring and
Malfunction of
piping mismatch system
Malfunction of
transmission
(accessory
device)
Replace the
deodorising
catalyst
Simplified
remote
controller
malfunction
(HRV)
Door switch
open (HRV)
Replace the
high efficient
filter
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
System No. 2
Malfunction of
suction pipe
thermistor 1 for
heating
System No. 2
Malfunction of
suction pipe
thermistor 2 for
heating
Shortage of
Power voltage
refrigerant
imbalance or
amount
inverter PCB
(thermal storage
unit)
Automatic
refrigerant
charge
operation stop
Malfunction of
thermistor in
switch box
Malfunction of
radiating fin
temperature
sensor
Malfunction of
DC current
sensor
Malfunction of
Malfunction of
AC or DC output total input
current sensor
current sensor
Heat exchanger
freezing protection
during automatic
refrigerant
charging
Shortage of
refrigerant
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
Malfunction of
transmission
transmission
between remote (other system)
controllers
Improper
combination of
indoor and
outdoor units
Malfunction of
transmission
between optional
controllers for
centralized control
Improper
Address
combination of
duplication,
optional
improper setting
controllers for
centralized control
Reverse phase,
open phase
Malfunction of
high pressure
switch
Malfunction of
transmission
between outdoor
units or outdoor
storage unit
Malfunction of
centralized
remote
controller PCB
External
Malfunction of
protection
PCB
device activated
(HRV)
Ozone density
abnormal
Contaminated
sensor error
Malfunction of
Malfunction of
thermistor for
thermistor for
indoor air (HRV) outdoor air
(HRV)
Supply air
passage closed
Exhaust air
passage closed
Malfunction of
dust collection
unit (HRV)
Malfunction of
damper system
(HRV)
Replace the
humidify
element
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
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
Abnormal
chilled water
quantity or
abnormal AXP
System No. 2
Malfunction of
electronic
expansion valve
System No. 2
Malfunction of
suction pipe
thermistor
Malfunction of
System No. 1
transmission
Malfunction of
(between heat
inverter system
reclaim ventilation
unit and fan unit)
System No. 2
Malfunction of
inverter system
Malfunction of
thermal storage
unit
System No. 2
Malfunction of
discharge pipe
temperature
Malfunction of
brazed-plate
heat exchanger
freezing
Malfunction of
thermal storage
brine pump
Malfunction of
thermal storage
brine tank
Malfunction of
dehumidification
or leaving water
temperature
thermistor
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