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Error codes and parts to be checked
Wired
remote
controller
display
Wireless remote
controller Sensor block
display of receiving unit
Main problem 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
Indoor / Outdoor connecting 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
Indoor / Outdoor connecting 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.)
Е
10
CPU-CPU
communication error
Indoor
Indoor P.C. board --- Communication error between
main MCU and motor microcomputer MCU
Auto-reset
E11
Communication trouble
between Application
control kit and indoor
unit
Indoor
Communication trouble between Application control
kit and indoor unit
Entire stop
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 (
ТЕ
/ 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 (
ТА
), indoor P.C. board
--- Open-circuit or short-circuit of the room temp,
sensor (
ТА
) 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
Wired
remote
controller
display
Wireless remote
controller Sensor block
display of receiving unit
Main problem parts
Judging
device
Parts to be checked / error description
Air
conditioner
status
Indication
Operation Timer
Ready
GR GR OR
Flashing
F15
ALT
Temp. sensor
connection error
Outdoor
Temp, sensor (
ТЕ
/ 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
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
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
ТЕ
.
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
