Error codes and parts to be checked
Wired
Wireless remote controller
remote
Sensor block display of
controller
receiving unit
display
Main defective parts
Operation Timer
Ready
Indication
Flashing
GR GR OR
No header remote
controller
E01
Remote controller
communication error
Remote controller
E02
transmission error
Indoor unit-remote
E03
controller regular
communication error
Indoor unit-outdoor
unit serial
communication error
E04
IPDU-CDB
communication error
Duplicated indoor
E08
addresses
Duplicated header
E09
remote controllers
CPU-CPU
E10
communication error
Header unit follower
E18
unit regular
communication error
IPDU communication
E31
error
Indoor unit heat
F01
ALT
exchanger sensor
(TCJ) error
Indoor unit heat
F02
ALT
exchanger sensor
(TC) error
Outdoor unit
F04
ALT
discharge temp.
sensor (TD) error
Outdoor unit temp.
F06
ALT
sensor (TE / TS) error Outdoor
F07
ALT
TL sensor error
Outdoor unit outside
F08
ALT
air temp. sensor error
Indoor unit room
F10
ALT
temp. sensor (TA)
error
F12
ALT
TS sensor error
Heat sink sensor
F13
ALT
error
Temp. sensor
F15
ALT
connection error
Indoor unit, other P.C.
F29
SIM
board error
93-EN
Judging
Parts to be checked / error 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.
System interconnection wires, indoor P.C. board,
Remote
remote controller
controller
--- No signal can be sent to the indoor unit.
Remote controller, network adapter, indoor P.C.
Indoor
board --- No data is received from the remote
controller or network adapter.
System interconnection wires, indoor P.C. board,
Indoor
outdoor P.C. board --- Serial communication error
between indoor unit and outdoor unit
Indoor address setting error --- The same address as
Indoor
the self-address was detected.
Remote controller address setting error --- Two
remote controllers are set as header in the double-
Remote
remote controller control.
controller
(* The header indoor unit stops raising alarm and
follower indoor units continue to operate.)
Indoor P.C. board --- Communication error between
Indoor
main MCU and motor microcomputer MCU
Indoor P.C. board --- Regular communication is not
Indoor
possible between header and follower indoor units or
between twin header (main) and follower (sub) units.
Outdoor
Communication error 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 P.C. board
--- Open-circuit or short-circuit of the heat exchanger
temp. sensor was detected.
TL sensor may be displaced, disconnected or short-
Outdoor
circuited.
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 --- Open-
Indoor
circuit or short-circuit of the room temp. sensor (TA)
was detected.
TS sensor may be displaced, disconnected or short-
Outdoor
circuited.
Abnormal temperature was detected by the temp.
Outdoor
sensor of the IGBT heat sink.
Outdoor
Temp. sensor (TE / TS) may be connected incorrectly.
Indoor
Indoor P.C. board --- EEPROM error
– 47 –
Wired
Wireless remote controller
remote
Sensor block display of
controller
receiving unit
display
Operation Timer
Ready
Indication
Air
GR GR OR
conditioner
status
F31
H01
*
H02
*
H03
Auto-
H04
reset
H06
Auto-
reset
L03
Auto-
L07
reset
L08
*
L09
L10
Auto-
reset
Auto-
L20
reset
Entire
stop
Auto-
L29
reset
Auto-
reset
L30
Entire
stop
L31
Entire
stop
P01
Entire
stop
P03
Operation
continued
P04
Auto-
reset
P05
Entire
stop
P07
Entire
stop
P10
Entire
stop
Auto-
reset
Judging
Main defective parts
Parts to be checked / error description
device
Flashing
Outdoor unit P.C.
Outdoor P.C. board ---- In the case of EEPROM error. Entire
SIM
Outdoor
board
Current detect circuit, power voltage --- Minimum
Outdoor unit
frequency was reached in the current releasing
compressor
Outdoor
control or short-circuit current (Idc) after direct
breakdown
excitation was detected
Outdoor unit
Outdoor
Compressor circuit --- Compressor lock was detected.
compressor lock
Current detect circuit, outdoor unit P.C. board ---
Outdoor unit current
Outdoor
Abnormal current was detected in AC-CT or a phase
detect circuit error
loss was detected.
Case thermostat
Outdoor
Malfunction of the case thermostat
operation
Current, high-pressure switch circuit, outdoor P.C.
Outdoor unit low-
Outdoor
board --- Pressure sensor error was detected or low-
pressure system error
pressure protective operation was activated.
Duplicated header
Indoor address setting error --- There are two or more
SIM
Indoor
indoor units
header units in the group.
Group line in
Indoor address setting error --- There is at least one
SIM
individual indoor unit
Indoor
group-connected indoor unit among individual indoor
units.
Indoor group address
Indoor address setting error --- Indoor address group
SIM
Indoor
not set
has not been set.
Indoor unit capacity
SIM
Indoor
Indoor unit capacity has not been set.
not set
Outdoor unit P.C.
In the case of outdoor P.C. board jumper wire (for
SIM
Outdoor
board
service) setting error
Network
Address setting, central control remote controller,
LAN communication
adapter
SIM
network adapter --- Duplication of address in central
error
central
control communication
control
Other outdoor unit error
Other outdoor unit
1) Communication error between IPDU MCU and
SIM
Outdoor
error
CDB MCU
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 P.C.
Phase sequence
SIM
Outdoor
board --- Abnormal phase sequence of the 3-phase
error, etc.
power supply
Indoor fan motor, indoor P.C. board --- Indoor AC fan
ALT
Indoor unit fan error
Indoor
error (fan motor thermal relay activated) was detected.
Outdoor unit
An error was detected in the discharge temp.
ALT
Outdoor
discharge temp. error
releasing control.
High-pressure switch --- The IOL was activated or an
Outdoor unit high-
ALT
pressure system error Outdoor
error was detected in the high-pressure releasing
control using the TE.
The power wire may be connected incorrectly. Check
ALT
Open phase detected Outdoor
open phase and voltages of the power supply.
Abnormal temperature was detected by the temp.
ALT
Heat sink overheat
Outdoor
sensor of the IGBT heat sink.
Drain pipe, clogging of drainage, float switch circuit,
Indoor unit water
ALT
Indoor
indoor P.C. board --- Drainage is out of order or the
overflow detected
float switch was activated.
Air
conditioner
status
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
Entire
stop
Entire
stop
Entire
stop
Entire
stop
94-EN