– 28 –
Wired
remote
controller
display
Wireless remote controller
Sensor block display of
receiving unit
Main defective parts
Judging
device
Parts to be checked / error description
Air
conditioner
status
Indication
Operation Timer
Ready
GR GR OR
Flashing
F12
ALT
TS sensor error
Outdoor
TS sensor may be displaced, disconnected or
short-circuited.
Entire stop
F13
ALT
Heat sink sensor error
Outdoor
Abnormal temperature was detected by the temp.
sensor of the IGBT heat sink.
Entire stop
F15
ALT
Temp. sensor
connection error
Outdoor
Temp. sensor (TE/TS) may be connected
incorrectly.
Entire stop
F29
SIM
Indoor unit, other
P.C. board error
Indoor
Indoor P.C. board --- EEPROM error
Auto-reset
F31
SIM
Outdoor unit P.C. board Outdoor
Outdoor P.C. board ---- In the case of EEPROM
error.
Entire stop
H01
Outdoor unit
compressor
breakdown
Outdoor
Current detect circuit, power voltage --- Minimum
frequency was reached in the current releasing
control or short-circuit current (Idc) after direct
excitation was detected
Entire stop
H02
Outdoor unit
compressor lock
Outdoor
Compressor circuit --- Compressor lock was
detected.
Entire stop
H03
Outdoor unit current
detect circuit error
Outdoor
Current detect circuit, outdoor unit P.C. board ---
Abnormal current was detected in AC-CT or a
phase loss was detected.
Entire stop
H04
Case thermostat
operation (1)
Outdoor
Malfunction of the case thermostat
Entire stop
H06
Outdoor unit
low-pressure system
error
Outdoor
Current, high-pressure switch circuit, outdoor P.C.
board --- Pressure sensor error was detected or
low-pressure protective operation was activated.
Entire stop
L03
SIM
Duplicated header
indoor units
Indoor
Indoor address setting error --- There are two or
more header units in the group.
Entire stop
L07
SIM
Group line in individual
indoor unit
Indoor
Indoor address setting error --- There is at least
one group-connected indoor unit among individual
indoor units.
Entire stop
L08
SIM
Indoor group address
not set
Indoor
Indoor address setting error --- Indoor address
group has not been set.
Entire stop
L09
SIM
Indoor unit capacity
not set
Indoor
Indoor unit capacity has not been set.
Entire stop
L10
SIM
Outdoor unit P.C. board Outdoor
In the case of outdoor P.C. board jumper wire
(for service) setting error
Entire stop
L20
SIM
LAN communication
error
Network
adapter
central
control
Address setting, central control remote controller,
network adapter --- Duplication of address in
central control communication
Auto-reset
L29
SIM
Other outdoor unit
error
Outdoor
Other outdoor unit error
Entire stop
1) Communication error between IPDU MCU and
CDB MCU
Entire stop
2) Abnormal temperature was detected by the heat
sink temp. sensor in IGBT.
L30
SIM
Abnormal external
input into indoor unit
(interlock)
Indoor
External devices, outdoor unit P.C. board ---
Abnormal stop due to incorrect external input into
CN80
Entire stop
L31
SIM
Phase sequence
error, etc.
Outdoor
Power supply phase sequence, outdoor unit P.C.
board --- Abnormal phase sequence of the 3-phase
power supply
Operation
continued
(thermost
at OFF)
Wired
remote
controller
display
Wireless remote controller
Sensor block display of
receiving unit
Main defective parts
Judging
device
Parts to be checked / error description
Air
conditioner
status
Indication
Operation Timer
Ready
GR GR OR
Flashing
P01
ALT
Indoor unit fan error
Indoor
Indoor fan motor, indoor P.C. board --- Indoor AC
fan error (fan motor thermal relay activated) was
detected.
Entire stop
P03
ALT
Outdoor unit discharge
temp. error
Outdoor
An error was detected in the discharge temp.
releasing control.
Entire stop
P04
ALT
Outdoor unit
high-pressure system
error
Outdoor
High-pressure switch --- The IOL was activated
or an error was detected in the high-pressure
releasing control using the TE.
Entire stop
P05
ALT
Open phase detected
Outdoor
The power wire may be connected incorrectly.
Check open phase and voltages of the power
supply.
Entire stop
P07
ALT
Heat sink overheat
Outdoor
Abnormal temperature was detected by the temp.
sensor of the IGBT heat sink.
Entire stop
P10
ALT
Indoor unit water
overflow detected
Indoor
Drain pipe, clogging of drainage, float switch
circuit, indoor P.C. board --- Drainage is out of
order or the float switch was activated.
Entire stop
P12
ALT
The fan error of the
indoor unit
Indoor
Abnormal operation of the indoor fan motor, indoor
P.C. board, or indoor DC fan (over current or lock,
etc.) is detected.
Entire stop
P15
ALT
Gas leakage detected
Outdoor
There may be gas leakage from the pipe or
connecting part. Check for gas leakage.
Entire stop
P19
ALT
4-way valve error
Outdoor
(Indoor)
4-way valve, indoor temp. sensors (TC/TCJ) --- An
error was detected due to temperature drop of the
indoor unit heat exchanger sensor when heating.
Auto-reset
P20
ALT
High-pressure
protective operation
Outdoor
High-pressure protection
Entire stop
P22
ALT
Outdoor unit fan error
Outdoor
Outdoor unit fan motor, outdoor unit P.C. board ---
An error (overcurrent, locking, etc.) was detected in
the outdoor unit fan drive circuit.
Entire stop
P26
ALT
Outdoor unit inverter
Idc activated
Outdoor
IGBT, outdoor unit P.C. board, inverter wiring,
compressor --- Short-circuit protection for
compressor drive circuit devices (G-Tr/IGBT) was
activated.
Entire stop
P29
ALT
Outdoor unit position
error
Outdoor
Outdoor unit P.C. board, high-pressure switch ---
Compressor motor position error was detected.
Entire stop
P31
ALT
Other indoor unit error
Indoor
Another indoor unit in the group is raising an alarm. Entire stop
E03/L07/L03/L08 alarm check locations and error
description
Auto-reset
: Lighting : Flashing : OFF : The air conditioner automatically enters the auto-address setting mode.
ALT : When two LEDs are flashing, they flash alternately. SIM : When two LEDs are flashing, they flash in synchronization.
Receiving unit display OR : Orange GR : Green
EN
55-EN
56-EN
1128950138-00_S01_297x210_96p_S_p70_220212.indd 29
3/23/2022 8:10:50 AM
