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Wired
Wireless remote
remote
controller
controller
Sensor block display of
display
receiving unit
Main defective parts
Operation
Timer
Ready
GR
GR
OR
Indication
Flashing
Temp. sensor
F
1
5
A
L
T
connection error
Indoor unit, other P.C.
F
2
9
I S
M
board error
Outdoor unit P.C.
F
3
1
I S
M
board
Outdoor unit
H01
compressor
breakdown
Outdoor unit
H02
compressor lock
Outdoor unit current
H03
detect circuit error
Case thermostat
H04
operation
Outdoor unit low-
H06
pressure system error
Duplicated header
L
0
3
I S
M
indoor units
Group line in individual
L
0
7
I S
M
indoor unit
Indoor group address
L
0
8
I S
M
not set
Indoor power level not
L
0
9
I S
M
set
Outdoor unit P.C.
L
1
0
I S
M
board
Other outdoor unit
L
2
9
I S
M
error
Abnormal external
L
3
0
I S
M
input into indoor unit
(interlock)
Phase sequence error,
L
3
1
I S
M
etc.
Outdoor unit discharge
P
0
3
A
L
T
temp. error
Outdoor unit high-
P
0
4
A
L
T
pressure system error
P
0
5
A
L
T
O
p
e
n
p
h
a
s
e
P
0
7
A
L
T
H
e
t a
s
n i
k
o
v
Indoor unit water
P
1
0
A
L
T
overflow detected
The fan error of the
P
1
2
A
L
T
indoor unit
45-EN
Judging
Parts to be checked / error description
device
Outdoor
Temp. sensor (TE / TS) may be connected incorrectly.
Indoor
Indoor P.C. board --- EEPROM error
Outdoor
Outdoor P.C. board ---- In the case of EEPROM error.
Current detect circuit, power voltage --- Minimum
frequency was reached in the current releasing control or
Outdoor
short-circuit current (Idc) after direct excitation was
detected
Outdoor
Compressor circuit --- Compressor lock was detected.
Current detect circuit, outdoor unit P.C. board ---
Outdoor
Abnormal current was detected in AC-CT or a phase loss
was detected.
O
u
d t
o
r o
M
l a
u f
n
t c
o i
n
f o
h t
e
c
a
s
e
h t
r e
m
o
t s
t a
Current, high-pressure switch circuit, outdoor P.C. board
Outdoor
--- Ps pressure sensor error was detected or low-pressure
protective operation was activated.
Indoor address setting error --- There are two or more
Indoor
header units in the group.
Indoor address setting error --- There is at least one
Indoor
group-connected indoor unit among individual indoor
units.
Indoor address setting error --- Indoor address group has
Indoor
not been set.
Indoor
Indoor power level has not been set.
In the case of outdoor P.C. board jumper wire (for service)
Outdoor
setting error
O
h t
r e
o
u
d t
o
r o
u
n
t i
e
r r
r o
1) Communication error between IPDU MCU and CDB
Outdoor
MCU
2) Abnormal temperature was detected by the heat sink
temp. sensor in IGBT.
External devices, outdoor unit P.C. board --- Abnormal
Indoor
stop due to incorrect external input into CN80
Power supply phase sequence, outdoor unit P.C. board -
Outdoor
-- Abnormal phase sequence of the 3-phase power
supply
An error was detected in the discharge temp. releasing
Outdoor
control.
High-pressure switch --- The IOL was activated or an
Outdoor
error was detected in the high-pressure releasing control
using the TE.
The power cable may be connected incorrectly. Check
d
e
e t
c
e t
d
O
u
d t
o
r o
open phase and voltages of the power supply.
Abnormal temperature was detected by the temp. sensor
e
h r
e
t a
O
u
d t
o
r o
of the IGBT heat sink.
Drain pipe, clogging of drainage, float switch circuit,
Indoor
indoor P.C. board --- Drainage is out of order or the float
switch was activated.
Abnormal operation of the indoor fan motor, indoor P.C.
Indoor
board, or indoor DC fan (over current or lock, etc.) is
detected.
– 23 –
Wired
Wireless remote
remote
controller
controller
Sensor block display of
display
receiving unit
Air
conditioner
status
Operation
Timer
Ready
GR
GR
OR
Indication
Entire stop
P
1
5
Auto-reset
P
1
9
Entire stop
P
2
0
Entire stop
P
2
2
Entire stop
P
2
6
Entire stop
P
2
9
E
n
i t
e r
s
o t
p
P
3
1
Entire stop
: Lighting
: Flashing
ALT: When two LEDs are flashing, they flash alternately. SIM: When two LEDs are flashing, they flash in synchronization.
Entire stop
Receiving unit display OR: Orange GR: Green
Entire stop
Entire stop
Entire stop
Entire stop
E
n
i t
e r
s
o t
p
Entire stop
Entire stop
Operation
continued
(thermostat
OFF)
Entire stop
Entire stop
Entire stop
Entire stop
Entire stop
Entire stop
Judging
Main defective parts
Parts to be checked / error description
device
Flashing
There may be gas leakage from the pipe or connecting
A
L
T
G
a
s
e l
a
k
a
g
e
d
e
e t
c
e t
d
O
u
d t
o
r o
part. Check for gas leakage.
4-way valve, indoor temp. sensors (TC / TCJ) --- An error
Outdoor
A
L
T
- 4
w
a
y
v
a
v l
e
e
r r
r o
was detected due to temperature drop of the indoor unit
(Indoor)
heat exchanger sensor when heating.
High-pressure
A
L
T
O
u
d t
o
r o
H
g i
h
p -
e r
s s
u
e r
p
o r
e t
t c
protective operation
Outdoor unit fan motor, outdoor unit P.C. board --- An
A
L
T
O
u
d t
o
r o
u
n
t i
a f
n
e
r r
r o
O
u
d t
o
r o
error (overcurrent, locking, etc.) was detected in the
outdoor unit fan drive circuit.
IGBT, outdoor unit P.C. board, inverter wiring,
Outdoor unit inverter
A
L
T
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 ---
A
L
T
Outdoor
error
Compressor motor position error was detected.
Another indoor unit in the group is raising an alarm.
A
L
T
O
h t
r e
n i
d
o
r o
u
n
t i
e
r r
r o
n I
d
o
r o
E03 / L07 / L03 / L08 alarm check locations and error
description
: OFF
: The air conditioner automatically enters the auto-address setting mode.
Air
conditioner
status
Entire stop
Auto-reset
(Auto-reset)
o i
n
E
n
i t
e r
s
o t
p
Entire stop
Entire stop
Entire stop
Entire stop
Auto-reset
46-EN
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