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 has been
lost (so has central control communication).
E04
–
–
–
–
Indoor-outdoor periodic
communication trouble
Signals are not being received from outdoor unit.
E08 E08 Indoor unit detects address identical to its own.Duplicated indoor address
Duplicated indoor address
E18
Trouble in periodic
communication between
indoor header and follower unit
Periodic communication between indoor header
and follower units cannot be maintained.
TLA––10F
Indoor heat exchanger
temperature sensor (TCJ) trouble
Heat exchanger temperature sensor (TCJ) has
been open/short-circuited.
TLA––20F
Indoor heat exchanger
temperature sensor (TC2) trouble
Heat exchanger temperature sensor (TC2) has
been open/short-circuited.
TLA––30F
Indoor heat exchanger
temperature sensor (TC1) trouble
Heat exchanger temperature sensor (TC1) has
been open/short-circuited.
TLA––01F
Room air temperature sensor
(TA/TSA) trouble
Room air temperature sensor (TA) has been
open/short-circuited.
TLA––11F
Discharge air temperature
sensor (TF/TFA) trouble
Discharge air temperature sensor (TF) has been
open/short-circuited.
MIS––92F
P.C. board or other indoor
check code
Indoor EEPROM is abnormal (some other
trouble may be detected).
MIS––30L
Duplicated indoor group header
unit
There is more than one header unit in group.
MIS––70L
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.
MIS–80L80L Indoor group address not set
Address setting has not been performed for one
or more indoor units (also detected at outdoor
unit end).
MIS––90L Indoor capacity not set
Capacity setting has not been performed for
indoor unit.
MIS––02L
There is duplication in central control address
setting.
Duplicated central control
address
L30
Detected indoor unit
No.
SIM
Indoor fan trouble input
Unit shutdown has been caused by fan trouble
input (CN80 or CN90-pin 3).
TLA––10P Indoor AC fan trouble
Indoor AC fan trouble is detected (activation of
fan motor thermal relay).
– –
L30
TLA––13P
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
ALT
Detected indoor unit
No.
P10P10
Safety contact input
Unit shutdown has been caused by safety
contact input (CN90-pin 2).
––L02
In case of different outdoor unit (Not corresponded
to DX-COIL INTERFACE)
Outdoor units model disagreed
trouble
––L22
Connection of group control between normal
indoor units and Indoor (DX) unit.
Incompatible group combination
of indoor units
TCC-LINK central
control or main
remote control
display
ALT
Outside air suction temperature
sensor (TOA) trouble
Open/Short of outside air suction temperature
sensor (TOA) was detected.
ALT
Indoor air suction temperature
sen sor (TRA) trouble
Discharge air temperature sensor (TF) has been
open/short-circuited.
––F17
––F18
8-2. 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)
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