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Check codes and parts to be checked
Wired
Wireless remote
remote
controller Sensor block
controller
display of receiving unit
display
Main defective parts
Operation Timer
Indication
Ready
Flashing
GR GR OR
No header remote
controller
E01
Remote controller
communication trouble
Remote controller
E02
transmission trouble
Indoor unit-remote
E03
controller regular
communication trouble
Indoor unit-outdoor unit
serial communication
trouble
E04
IPDU-CDB
communication trouble
Duplicated indoor
E08
addresses
Duplicated header
E09
remote controllers
CPU-CPU
Е10
communication trouble
Communication trouble
between Application
E11
control kit and Indoor
unit
Header unit
E18
follower unit regular
communication trouble
IPDU communication
E31
trouble
Indoor unit heat
F01
ALT
exchanger sensor
(TCJ) trouble
Indoor unit heat
F02
ALT
exchanger sensor (TC)
trouble
Outdoor unit discharge
F04
ALT
temp. sensor (TD)
trouble
Outdoor unit temp.
F06
ALT
sensor (TE / TS)
trouble
F07
ALT
TL sensor trouble
Outdoor unit outside
F08
ALT
air temp. sensor trouble
Indoor unit room temp.
F10
ALT
sensor (TA) trouble
45-EN
Judging
Parts to be checked / trouble description
device
Incorrect remote controller setting --- The header
remote controller has not been set (including two
Remote
remote controllers).
controller
No signal can be received from the indoor unit.
Indoor / outdoor connecting wires, indoor
Remote
P.C. board, remote controller --- No signal can be
controller
sent to the indoor unit.
Remote controller, network adapter, indoor
Indoor
P.C. board --- No data is received from the remote
controller or network adapter.
Indoor / outdoor connecting wires, indoor P.C. board,
Indoor
outdoor P.C. board --- Serial communication trouble
between indoor unit and outdoor unit
Indoor address setting trouble --- The same
Indoor
address as the self-address was detected.
Remote controller address setting trouble ---
Two remote controllers are set as header in the
Remote
doubleremote controller control.
controller
(* The header indoor unit stops raising alarm and
follower indoor units continue to operate.)
Indoor P.C. board --- Communication trouble
Indoor
between main MCU and motor microcomputer
MCU
Communication trouble between Application control
Indoor
kit and Indoor unit
Indoor P.C. board --- Regular communication is not
possible between header and follower indoor units
Indoor
or between twin header (main) and follower (sub)
units.
Outdoor
Communication trouble between IPDU and CDB
Heat exchanger sensor (TCJ), indoor P.C. board ---
Indoor
Open-circuit or short-circuit of the heat exchanger
sensor (TCJ) was detected.
Heat exchanger sensor (TC), indoor P.C. board ---
Indoor
Open-circuit or short-circuit of the heat exchanger
sensor (TC) was detected.
Outdoor temp. sensor (TD), outdoor P.C. board ---
Outdoor
Open-circuit or short-circuit of the discharge temp.
sensor was detected.
Outdoor temp. sensors (TE / TS), outdoor
Outdoor
P.C. board --- Open-circuit or short-circuit of the
heat exchanger temp. sensor was detected.
TL sensor may be displaced, disconnected or
Outdoor
shortcircuited.
Outdoor temp. sensor (TO), outdoor P.C. board ---
Outdoor
Open-circuit or short-circuit of the outdoor air temp.
sensor was detected.
Room temp. sensor (TA), indoor P.C. board ---
Indoor
Opencircuit or short-circuit of the room temp.
sensor (TA) was detected.
– 23 –
Wired
Wireless remote
remote
controller Sensor block
controller
display of receiving unit
display
Operation Timer
Air
Indication
Ready
conditioner
GR GR OR
status
F12
F13
F15
*
F29
*
F30
F31
Auto-reset
H01
Auto-reset
H02
H03
Auto-reset
H04
*
H06
Auto-reset
L03
L07
Entire stop
L08
Auto-reset
L09
L10
Entire stop
L20
Auto-reset
Auto-reset
L29
Entire stop
L30
Entire stop
L31
Entire stop
Operation
continued
P01
Auto-reset
P03
Judging
Main defective parts
Parts to be checked / trouble description
device
Flashing
TS sensor may be displaced, disconnected or
ALT
TS sensor trouble
Outdoor
shortcircuited.
Heat sink sensor
Abnormal temperature was detected by the temp.
ALT
Outdoor
trouble
sensor of the IGBT heat sink.
Temp. sensor
Temp. sensor (TE / TS) may be connected
ALT
Outdoor
connection trouble
incorrectly.
Indoor unit, other
SIM
Indoor
Indoor P.C. board --- EEPROM trouble
P.C. board trouble
Occupancy sensor
SIM
Indoor
Abnormality was detected from occupancy sensor.
trouble
Outdoor P.C. board ---- In the case of EEPROM
SIM
Outdoor unit P.C. board Outdoor
trouble.
Current detect circuit, power voltage --- Minimum
Outdoor unit
frequency was reached in the current releasing
Outdoor
compressor breakdown
control or short-circuit current (Idc) after direct
excitation was detected
Outdoor unit
Compressor circuit --- Compressor lock was
Outdoor
compressor lock
detected.
Current detect circuit, outdoor unit P.C. board
Outdoor unit current
Outdoor
--- Abnormal current was detected in AC-CT or a
detect circuit trouble
phase loss was detected.
Case thermostat
Outdoor
Malfunction of the case thermostat
operation
Current, high-pressure switch circuit, outdoor
Outdoor unit
P.C. board --- Pressure sensor trouble was
lowpressure system
Outdoor
detected or low-pressure protective operation was
trouble
activated.
Duplicated header
Indoor address setting trouble --- There are two or
SIM
Indoor
indoor units
more header units in the group.
Indoor address setting trouble --- There is at least
Group line in individual
SIM
Indoor
one group-connected indoor unit among individual
indoor unit
indoor units.
Indoor group address
Indoor address setting trouble --- Indoor address
SIM
Indoor
not set
group has not been set.
Indoor unit capacity
SIM
Indoor
Indoor unit capacity has not been set.
not set
Outdoor unit
In the case of outdoor P.C. board jumper wire
SIM
Outdoor
P.C. board
(for service) setting trouble
Network
Address setting, central control remote controller,
LAN communication
adapter
SIM
network adapter --- Duplication of address in
trouble
central
central control communication
control
Other outdoor unit trouble
1) Communication trouble between IPDU MCU
Other outdoor unit
SIM
Outdoor
and CDB MCU
trouble
2) Abnormal temperature was detected by the heat
sink temp. sensor in IGBT.
Abnormal external
External devices, outdoor unit P.C. board ---
SIM
input into indoor unit
Indoor
Abnormal stop due to incorrect external input into
(interlock)
CN80
Power supply phase sequence, outdoor unit
Phase sequence
SIM
Outdoor
P.C. board --- Abnormal phase sequence of the
trouble, etc.
3-phase power supply
Indoor fan motor, indoor P.C. board --- Indoor AC
ALT
Indoor unit fan trouble
Indoor
fan trouble (fan motor thermal relay activated) was
detected.
Outdoor unit discharge
An trouble was detected in the discharge temp.
ALT
Outdoor
temp. trouble
releasing control.
Air
conditioner
status
Entire-stop
Entire stop
Entire stop
Auto-reset
Operation
continued
Entire stop
Entire stop
Entire stop
Entire stop
Entire stop
Entire stop
Entire stop
Entire stop
Entire stop
Entire stop
Entire stop
Auto-reset
Entire stop
Entire stop
Entire stop
Operation
continued
(thermost
at OFF)
Entire stop
Entire stop
46-EN
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