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Remote
Wireless remote controller
controller
Sensor block display of
display
receiving unit
Main defective parts
Operation Timer
Indication
Ready
Flashing
GR GR OR
F12
ALT
TS sensor trouble
Heat sink sensor
F13
ALT
trouble
Temp. sensor
F15
ALT
connection trouble
Indoor unit, other P.C.
F29
SIM
board trouble
Outdoor unit P.C.
F31
SIM
board
Outdoor unit
H01
compressor
breakdown
Outdoor unit
H02
compressor lock
Outdoor unit current
H03
detect circuit trouble
Case thermostat
H04
operation
Outdoor unit low-
H06
pressure system
trouble
Refrigerant leak
J29
SIM
detection sensor
trouble
Refrigerant leak
J30
SIM
detection
Refrigerant leak
detection sensor
J31
SIM
exceeding its life of
the product
Duplicated header
L03
SIM
indoor units
Group line in
L07
SIM
individual indoor unit
Indoor group address
L08
SIM
not set
Indoor unit capacity
L09
SIM
not set
Outdoor unit P.C.
L10
SIM
board
LAN communication
L20
SIM
trouble
Other outdoor unit
L29
SIM
trouble
Abnormal external
L30
SIM
input into indoor unit
(interlock)
Phase sequence
L31
SIM
trouble, etc.
55-EN
Judging
Parts to be checked / trouble description
device
TS sensor may be displaced, disconnected or short-
Outdoor
circuited.
Abnormal temperature was detected by the temp.
Outdoor
sensor of the IGBT heat sink.
Outdoor
Temp. sensor (TE / TS) may be connected incorrectly.
Indoor
Indoor P.C. board --- EEPROM trouble
Outdoor P.C. board ---- In the case of EEPROM
Outdoor
trouble.
Current detect circuit, power voltage --- Minimum
frequency was reached in the current releasing
Outdoor
control or short-circuit current (Idc) after direct
excitation was detected
Compressor circuit --- Compressor lock was detected. Entire
Outdoor
Current detect circuit, outdoor unit P.C. board ---
Outdoor
Abnormal current was detected in AC-CT or a phase
loss was detected.
Outdoor
Malfunction of the case thermostat
Current, high-pressure switch circuit, outdoor P.C.
Outdoor
board --- Pressure sensor trouble was detected or
low-pressure protective operation was activated.
A trouble or open-short-circuit was detected by output
Indoor
of refrigerant leak detection sensor.
Refrigerant leak was detected by refrigerant leak
Indoor
detection sensor.
In the case of refrigerant leak detection sensor
Indoor
exceeding its life of the product.
Indoor address setting trouble --- There are two or
Indoor
more header units in the group.
Indoor address setting trouble --- There is at least one
Indoor
group-connected indoor unit among individual indoor
units.
Indoor address setting trouble --- Indoor address
Indoor
group has not been set.
Indoor
Indoor unit capacity has not been set.
In the case of outdoor P.C. board jumper wire (for
Outdoor
service) setting trouble
Network
Address setting, central control remote controller,
adapter
network adapter --- Duplication of address in central
central
control communication
control
Other outdoor unit trouble
1) Communication trouble between IPDU MCU and
Outdoor
CDB MCU
2) Abnormal temperature was detected by the heat
sink temp. sensor in IGBT.
External devices, outdoor unit P.C. board ---
Indoor
Abnormal stop due to incorrect external input into
CN80
Power supply phase sequence, outdoor unit P.C.
Outdoor
board --- Abnormal phase sequence of the 3-phase
power supply
Remote
Wireless remote controller
controller
Sensor block display of
Air
display
receiving unit
conditioner
Operation Timer
status
Indication
Ready
GR GR OR
Entire
stop
P01
Entire
stop
P03
Entire
stop
Auto-
P04
reset
Entire
P05
stop
P07
Entire
stop
P10
stop
P12
Entire
stop
P15
Entire
stop
P19
Entire
stop
P20
Operation
continued
P22
Entire
stop
P26
Operation
continued
P29
Entire
stop
P31
Entire
stop
Entire
: Lighting
: Flashing
: OFF
stop
ALT: When two LEDs are flashing, they flash alternately. SIM: When two LEDs are flashing, they flash in synchronization.
Entire
Receiving unit display OR: Orange GR: Green
stop
Entire
stop
Auto-
reset
Entire
stop
Entire
stop
Entire
stop
Operation
continued
(thermos-
tat OFF)
– 28 –
Judging
Main defective parts
Parts to be checked / trouble description
device
Flashing
Indoor fan motor, indoor P.C. board --- Indoor AC fan
ALT
Indoor unit fan trouble Indoor
trouble (fan motor thermal relay activated) was
detected.
Outdoor unit
A trouble was detected in the discharge temp.
ALT
discharge temp.
Outdoor
releasing control.
trouble
Outdoor unit high-
High-pressure switch --- The IOL was activated or an
ALT
pressure system
Outdoor
trouble was detected in the high-pressure releasing
trouble
control using the TE.
The power wire may be connected incorrectly. Check
ALT
Open phase detected Outdoor
open phase and voltages of the power supply.
Abnormal temperature was detected by the temp.
ALT
Heat sink overheat
Outdoor
sensor of the IGBT heat sink.
Drain pipe, clogging of drainage, float switch circuit,
Indoor unit water
ALT
Indoor
indoor P.C. board --- Drainage is out of order or the
overflow detected
float switch was activated.
Abnormal operation of the indoor fan motor, indoor
The fan trouble of the
ALT
Indoor
P.C. board, or indoor DC fan (over current or lock,
indoor unit
etc.) is detected.
Gas leakage
There may be gas leakage from the pipe or
ALT
Outdoor
detected
connecting part. Check for gas leakage.
4-way valve, indoor temp. sensors (TC / TCJ) --- A
Outdoor
ALT
4-way valve trouble
trouble was detected due to temperature drop of the
(Indoor)
indoor unit heat exchanger sensor when heating.
High-pressure
ALT
Outdoor
High-pressure protection
protective operation
Outdoor unit fan motor, outdoor unit P.C. board --- A
Outdoor unit fan
ALT
Outdoor
trouble (overcurrent, locking, etc.) was detected in the
trouble
outdoor unit fan drive circuit.
IGBT, outdoor unit P.C. board, inverter wiring,
Outdoor unit inverter
ALT
Outdoor
compressor --- Short-circuit protection for compressor
Idc activated
drive circuit devices (G-Tr / IGBT) was activated.
Outdoor unit position
Outdoor unit P.C. board, high-pressure switch ---
ALT
Outdoor
trouble
Compressor motor position trouble was detected.
Another indoor unit in the group is raising an alarm.
Other indoor unit
ALT
Indoor
trouble
E03/L07/L03/L08 alarm check locations and trouble
description
: The air conditioner automatically enters the auto-address setting mode.
Air
conditioner
status
Entire
stop
Entire
stop
Entire
stop
Entire
stop
Entire
stop
Entire
stop
Entire
stop
Entire
stop
Auto-
reset
Entire
stop
Entire
stop
Entire
stop
Entire
stop
Entire
stop
Auto-
reset
56-EN
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