– 52 –
Check code
Display of receiving unit
Typical
problem
site
Description of
Check code
Outdoor 7-segment display
Indicator light block
Sub-code
Flash
E03
Indoor-remote control periodic
communication trouble
Communication from remote control or network
adaptor has been lost (so has central control
communication).
E04
–
–
–
–
Indoor-outdoor periodic
communication trouble
Signals are not being received from outdoor unit.
E08
E08
.
n
w
o
s
ti
o
t
l
a
c
it
n
e
d
i
s
s
e
r
d
d
a
s
t
c
e
t
e
d
ti
n
u
r
o
o
d
n
I
s
s
e
r
d
d
a
r
o
o
d
n
i
d
e
t
a
c
il
p
u
D
s
s
e
r
d
d
a
r
o
o
d
n
i
d
e
t
a
c
il
p
u
D
E10
Indoor inter-MCU communication
trouble
MCU communication between main control and
motor microcontroller is faulty.
E18
Trouble in periodic communication
between indoor header and
follower unit
Periodic communication between indoor header
and follower units cannot be maintained.
T
L
A
–
–
1
0
F
Indoor heat exchanger
temperature sensor (TCJ) trouble
Heat exchanger temperature sensor (TCJ) has
been open/short-circuited.
T
L
A
–
–
2
0
F
Indoor heat exchanger
temperature sensor (TC2) trouble
Heat exchanger temperature sensor (TC2) has
been open/short-circuited.
T
L
A
–
–
3
0
F
Indoor heat exchanger
temperature sensor (TC1) trouble
Heat exchanger temperature sensor (TC1) has
been open/short-circuited.
T
L
A
–
–
0
1
F
Room air
temperature sensor
(TA
/TSA
) trouble
Room air
temperature sensor (TA) has been
open/short-circuited.
T
L
A
–
–
1
1
F
Discharge
air
temperature
sensor (TF
/TFA
) trouble
Discharge
air
temperature sensor (TF) has been
open/short-circuited.
M
I
S
–
–
9
2
F
P.C. board or other indoor trouble
Indoor EEPROM is abnormal
(some other trouble may be detected).
M
I
S
–
–
3
0
L
Duplicated indoor group header
unit
There is more than one header unit in group.
M
I
S
–
–
7
0
L
Connection of group control cable
to stand-alone indoor unit
There is at least one stand-alone indoor unit to
which group control cable is connected.
M
I
S
–
8
0
L
8
0
L
Indoor group address not set
Address setting has not been performed for one or
more indoor units (also detected at outdoor unit
end).
M
I
S
–
–
9
0
L
Indoor capacity not set
Capacity setting has not been performed for indoor
unit.
M
I
S
–
–
0
2
L
Duplicated central control address
There is duplication in central control address
setting.
L30
Detected indoor unit No.
SIM
Indoor external trouble input
(interlock)
Unit shutdown has been caused by external
trouble input (CN080).
T
L
A
–
–
1
0
P
Indoor AC fan trouble
Indoor AC fan trouble is detected (activation
of fan motor thermal relay).
–
–
–
–
L30
T
L
A
–
–
1
3
P
Other indoor unit trouble
Follower unit cannot be operated due to header unit
alarm (E03/L03/L07/L08).
IPDU: Intelligent Power Drive Unit (Inverter P.C. board)
:
Lighting, :
Flashing, :
Goes
off
ALT.: Flashing is alternately when there are two flashing LED
SIM: Simultaneous flashing when there are two flashing LED
Operation Timer Ready
TCC-LINK central
control or main
remote control
display
10-2. Troubleshooting Method
The remote controls (main remote control and central control remote control) and the interface P.C. board of an
outdoor unit are provided with an LCD display (remote control) or a 7-segment display (outdoor interface P.C.
board) to display operational status. Using this self-diagnosis feature, the problem may be identified in the
event of a problem by following the method described below.
The list below summarizes check codes detected by various devices. Analyze the check code according to
where it is displayed and work out the nature of the problem in consultation with the list.
• When investigating a problem on the basis of a display provided on the indoor remote control or TCC-LINK
central control remote control - See the “TCC-LINK remote control or main remote control display” section of
the list.
• When investigating a problem on the basis of a display provided on an outdoor unit - See the “Outdoor 7-
segment display” section of the list.
• When investigating a problem on the basis of a wireless remote control-controlled indoor unit - See the “Light
sensor indicator light block” section of the list.
List of Check Codes (Indoor Unit)
(Check code detected by indoor unit)
