– 50 –
Error codes and parts to be checked
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
E01
No header remote
controller
Remote
controller
Incorrect remote controller setting --- The header
remote controller has not been set (including two
remote controllers).
*
Remote controller
communication error
No signal can be received from the indoor unit.
E02
Remote controller
transmission error
Remote
controller
System interconnection wires, indoor P.C. board,
remote controller
--- No signal can be sent to the indoor unit.
*
E03
Indoor unit-remote
controller regular
communication error
Indoor
Remote controller, network adapter, indoor P.C.
board --- No data is received from the remote
controller or network adapter.
Auto-
reset
E04
Indoor unit-outdoor
unit serial
communication error
Indoor
System interconnection wires, indoor P.C. board,
outdoor P.C. board --- Serial communication error
between indoor unit and outdoor unit
Auto-
reset
IPDU-CDB
communication error
E08
Duplicated indoor
addresses
Indoor
Indoor address setting error --- The same address as
the self-address was detected.
Auto-
reset
E09
Duplicated header
remote controllers
Remote
controller
Remote controller address setting error --- Two
remote controllers are set as header in the double-
remote controller control.
*
(* The header indoor unit stops raising alarm and
follower indoor units continue to operate.)
E10
CPU-CPU
communication error
Indoor
Indoor P.C. board --- Communication error between
main MCU and motor microcomputer MCU
Auto-
reset
E18
Header unit follower
unit regular
communication error
Indoor
Indoor P.C. board --- Regular communication is not
possible between header and follower indoor units or
between twin header (main) and follower (sub) units.
Auto-
reset
E31
IPDU communication
error
Outdoor
Communication error between IPDU and CDB
Entire
stop
F01
ALT
Indoor unit heat
exchanger sensor
(TCJ) error
Indoor
Heat exchanger sensor (TCJ), indoor P.C. board ---
Open-circuit or short-circuit of the heat exchanger
sensor (TCJ) was detected.
Auto-
reset
F02
ALT
Indoor unit heat
exchanger sensor
(TC) error
Indoor
Heat exchanger sensor (TC), indoor P.C. board ---
Open-circuit or short-circuit of the heat exchanger
sensor (TC) was detected.
Auto-
reset
F04
ALT
Outdoor unit
discharge temp.
sensor (TD) error
Outdoor
Outdoor temp. sensor (TD), outdoor P.C. board ---
Open-circuit or short-circuit of the discharge temp.
sensor was detected.
Entire
stop
F06
ALT
Outdoor unit temp.
sensor (TE/TS) error
Outdoor
Outdoor temp. sensors (TE/TS), outdoor P.C. board -
-- Open-circuit or short-circuit of the heat exchanger
temp. sensor was detected.
Entire
stop
F07
ALT
TL sensor error
Outdoor
TL sensor may be displaced, disconnected or short-
circuited.
Entire
stop
F08
ALT
Outdoor unit outside
air temp. sensor error Outdoor
Outdoor temp. sensor (TO), outdoor P.C. board ---
Open-circuit or short-circuit of the outdoor air temp.
sensor was detected.
Operation
continued
F10
ALT
Indoor unit room
temp. sensor (TA)
error
Indoor
Room temp. sensor (TA), indoor P.C. board --- Open-
circuit or short-circuit of the room temp. sensor (TA)
was detected.
Auto-
reset
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
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)
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
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
99-EN
100-EN
+001114119401_01EN.book Page 50 Wednesday, October 31, 2012 4:56 PM
