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11
Troubleshooting
Error 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 / 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
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.)
E10
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
(TCJ) 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 (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 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 (TA), indoor P.C. board
--- Open-circuit or short-circuit of the room temp.
sensor (TA) was detected.
Auto-reset
F12
ALT
TS sensor error
Outdoor
TS sensor may be displaced, disconnected or
short-circuited.
Entire stop
Con
fi
rmation and check
If a problem occurs with the air conditioner,
the OFF timer indicator alternately shows
the check code and the indoor Unit No.
in which the problem occurred.
Check code
The indoor Unit No. in which
the problem occurred.
Troubleshooting history and con
fi
rmation
You can check the troubleshooting history with the following procedure if a problem occurs with the air conditioner.
(The troubleshooting history records up to 4 incidents.)
You can check it during operation or when operation is stopped.
y
If you check the troubleshooting history during OFF timer operation, the OFF timer will be canceled.
Procedure
Description of operation
1
Push the OFF timer button for over 10 seconds and
the indicators appear as an image indicating the
troubleshooting history mode has been entered.
If [ Service check] is displayed, the mode enters in
the troubleshooting history mode.
y
[01: Order of troubleshooting history] appears in the
temperature indicator.
y
The OFF timer indicator alternately shows the
[check code] and the [indoor Unit No. ] in which the
problem occurred.
2
Each time the setting button is pushed, the recorded
troubleshooting history is displayed in sequence.
The troubleshooting history appears in order from [01]
(newest) to [04] (oldest).
CAUTION
In the troubleshooting history mode, DO NOT push the
Menu button for over 10 seconds, doing so deletes the
entire troubleshooting history of the indoor unit.
3
After you have
fi
nished checking, push the ON/OFF
button to return to the regular mode.
y
If the air conditioner is operating, it remains operated
even after the ON/OFF button has been pushed.
To stop its operation, push the ON/OFF button again.
