–26–
Check 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 / trouble 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
trouble
No signal can be received from the indoor unit.
E02
Remote controller
transmission trouble
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
trouble
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
trouble
Indoor
Indoor / outdoor connecting wires, indoor P.C. board,
outdoor P.C. board --- Serial communication trouble
between indoor unit and outdoor unit
Auto-
reset
IPDU-CDB
communication
trouble
E08
Duplicated indoor
addresses
Indoor
Indoor address setting trouble --- The same address
as the self-address was detected.
Auto-
reset
E09
Duplicated header
remote controllers
Remote
controller
Remote controller address setting trouble --- 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
trouble
Indoor
Indoor P.C. board --- Communication trouble 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
trouble
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
trouble
Outdoor Communication trouble between IPDU and CDB
Entire
stop
F01 ALT
Indoor unit heat
exchanger sensor
(TCJ) trouble
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) trouble
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) trouble
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)
trouble
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 trouble Outdoor
TL sensor may be displaced, disconnected or short-
circuited.
Entire
stop
F08 ALT
Outdoor unit outside
air temp. sensor
trouble
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)
trouble
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 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
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
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
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
(thermost
at OFF)
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
An trouble was detected in the discharge temp.
releasing control.
Entire
stop
Wired
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
51-EN 52-EN
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