– 23 –
■
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 / 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
communication error
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.)
E11
Communication error between
indoor P.C. board and optional
parts
Indoor
Communication error between indoor P.C. board
and optional parts
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 (TC) 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 (1) sensor error
Outdoor TS (1) sensor may be displaced, disconnected or
short-circuited.
Entire
stop
F13
ALT Heat sink sensor error
Outdoor Abnormal temperature was detected by the temp.
sensor of the IGBT heat sink.
Entire
stop
F15
ALT Temp. sensor connection error
Outdoor Temp. sensor (TE/TS) may be connected
incorrectly.
Entire
stop
11
Troubleshooting
■
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.
The indoor Unit No. in which
the problem occurred.
Check code
■
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.
• 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.
• [01: Order of troubleshooting history] appears in the
temperature indicator.
• 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
1
2
3
After you have
fi
nished checking, push the ON/OFF
button to return to the regular mode.
• 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.
