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11
Troubleshooting
Confirmation and check
When a trouble has occurred in the air
conditioner, the check code and the unit number
of the indoor unit appear on the display of the
remote controller.
* The check code appears only while the unit is
running.
Push the [
MONITOR] button or [
CANCEL] button to display the check information
screen.
While the check information screen appears:
Push the “
Contact” [
F1] button to
display the contact number for service.
Push the “
Information” [
F2] button
to display the model name and serial number of
the unit.
Cool
24
Mode
Fan Speed
Code : P10 Unit : 2–2
Check code
Unit number of the
malfunctioning
indoor unit
Check
Contact
Information
Return
Check
Code:P10
Unit:2–2
Contact
Information
Check codes and parts to be checked
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
47-EN
48-EN
