– 24 –
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
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
Indoor fan motor, indoor P.C. board --- Abnormal
operation (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. E03/L07/L03/L08 alarm check locations
and error description
Auto-
reset
: Lighting, : Flashing, : Goes 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
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
F29 SIM
Indoor unit, other P.C. board
error
Indoor Indoor P.C. board --- EEPROM error”
Auto-
reset
F30
SIM Occupancy sensor trouble Indoor Abnormality was detected from occupancy sensor.
Operation
continued
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 --- Ps 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)
P03 ALT
Outdoor unit discharge temp.
error
Outdoor
An error was detected in the discharge temp.
releasing control.
Entire
stop
P01
ALT Indoor unit fan trouble Indoor
Indoor fan motor, indoor P.C. board --- Indoor AC
fan trouble (fan motor thermal relay activated) was
detected.
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
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