–28–
F12 ALT TS sensor trouble Outdoor
TS sensor may be displaced, disconnected or short-
circuited.
Entire
stop
F13 ALT
Heat sink sensor
trouble
Outdoor
Abnormal temperature was detected by the temp.
sensor of the IGBT heat sink.
Entire
stop
F15 ALT
Temp. sensor
connection trouble
Outdoor Temp. sensor (TE / TS) may be connected incorrectly.
Entire
stop
F29 SIM
Indoor unit, other P.C.
board trouble
Indoor Indoor P.C. board --- EEPROM trouble
Auto-
reset
F31 SIM
Outdoor unit P.C.
board
Outdoor
Outdoor P.C. board ---- In the case of EEPROM
trouble.
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 trouble
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
Outdoor Malfunction of the case thermostat
Entire
stop
H06
Outdoor unit low-
pressure system
trouble
Outdoor
Current, high-pressure switch circuit, outdoor P.C.
board --- Pressure sensor trouble was detected or
low-pressure protective operation was activated.
Entire
stop
J29 SIM
Refrigerant leak
detection sensor
trouble
Indoor
A trouble or open-short-circuit was detected by output
of refrigerant leak detection sensor.
Operation
continued
J30 SIM
Refrigerant leak
detection
Indoor
Refrigerant leak was detected by refrigerant leak
detection sensor.
Entire
stop
J31 SIM
Refrigerant leak
detection sensor
exceeding its life of
the product
Indoor
In the case of refrigerant leak detection sensor
exceeding its life of the product.
Operation
continued
L03 SIM
Duplicated header
indoor units
Indoor
Indoor address setting trouble --- There are two or
more header units in the group.
Entire
stop
L07 SIM
Group line in
individual indoor unit Indoor
Indoor address setting trouble --- 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 trouble --- 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 trouble
Entire
stop
L20 SIM
LAN communication
trouble
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
trouble
Outdoor
Other outdoor unit trouble
Entire
stop
1) Communication trouble 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
trouble, etc.
Outdoor
Power supply phase sequence, outdoor unit P.C.
board --- Abnormal phase sequence of the 3-phase
power supply
Operation
continued
(thermos-
tat OFF)
Remote
controller
display
Wireless remote controller
Sensor block display of
receiving unit
Main defective parts
Judging
device
Parts to be checked / trouble description
Air
conditioner
status
Indication
Operation Timer
Ready
GR GR OR
Flashing
: 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
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
P03 ALT
Outdoor unit
discharge temp.
trouble
Outdoor
A trouble was detected in the discharge temp.
releasing control.
Entire
stop
P04 ALT
Outdoor unit high-
pressure system
trouble
Outdoor
High-pressure switch --- The IOL was activated or an
trouble 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 trouble 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 trouble
Outdoor
(Indoor)
4-way valve, indoor temp. sensors (TC / TCJ) --- A
trouble 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
trouble
Outdoor
Outdoor unit fan motor, outdoor unit P.C. board --- A
trouble (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
trouble
Outdoor
Outdoor unit P.C. board, high-pressure switch ---
Compressor motor position trouble was detected.
Entire
stop
P31 ALT
Other indoor unit
trouble
Indoor
Another indoor unit in the group is raising an alarm.
Entire
stop
E03/L07/L03/L08 alarm check locations and trouble
description
Auto-
reset
Remote
controller
display
Wireless remote controller
Sensor block display of
receiving unit
Main defective parts
Judging
device
Parts to be checked / trouble description
Air
conditioner
status
Indication
Operation Timer
Ready
GR GR OR
Flashing
55-EN 56-EN
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