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Check code
Location
Outdoor 7-segment display
Main
remote
detection
Check
Sub-code
controller
code
Indoor
unit
L07
–
–
Indoor
unit
L08
L08
–
Indoor
L09
–
–
unit
I/F
L10
L10
–
AI-NET
Indoor
L20
–
–
unit
I/F
Comp.
Fa
n
O
01
O
02
O
O
03
Circle (O): Faulty IPDU
L
2
9
L
2
9
(*) Concerning the "00" auxiliary
code
1) The wrong model setting
for the interface P.C. board
was used when the board
was replaced with the service
P.C. board.
In such a case, the sub-codes
"04" to "0F" for L29, which are
not included in the table above,
may be displayed.
Detected
Indoor
indoor address
unit
L30
L30
I/F
–
L31
–
Indoor
P01
–
–
unit
I/F
P03
P03
–
of
Description
System status
Connection of
Stop of
group control
corresponding
cable to stand-
unit
alone indoor unit
Indoor group /
Stop of
addresses not
corresponding
set
unit
Indoor capacity
Stop of
not set
corresponding
unit
Outdoor
All stop
capacity not set
Duplicated
All stop
central control
address
Error in No. of
All stop
IPDUs
External
Stop of
interlock of
corresponding
indoor unit
unit
Extended IC
Continued
error
operation
Indoor fan motor
Stop of
error
corresponding
unit
Discharge
All stop
temperature TD
error
100
123
Error detection
Check items (locations)
condition(s)
There is at least one stand-
Check indoor addresses.
alone indoor unit to which
group control cable is
connected.
Address setting has not been
Check indoor addresses.
performed for indoor units.
Note:
This code is displayed
when power is turned on
for the first time after
installation.
Capacity setting has not been
Set indoor capacity. (DN =
performed for indoor unit.
11)
Jumper wire provided on P.C.
Check model setting of P.C.
board for servicing I/F P.C.
board for servicing outdoor
board has not been removed
I/F P.C. board.
as required for given model.
There is duplication in central
Check central control
control address setting.
addresses.
Check network adaptor
P.C. board.
Insufficient number of IPDUs
Check model setting of
are detected when power is
P.C. board for servicing
turned on.
outdoor I/F P.C. board.
Check connection of UART
communication connector.
Check IPDU and I/F P.C.
board for defect.
Signal is present at
When external device is
external error input
connected to CN80
terminal (CN80) for 1
connector:
minute.
1) Check for defect in
external device.
2) Check for defect in indoor
P.C. board.
When external device is not
connected to CN80
connector:
1) Check for defect in indoor
P.C. board.
There is part failure in P.C.
Check outdoor P.C. board
board (I/F).
(I/F).
Check the lock of fan motor
(AC fan).
Check wiring.
Discharge temperature (TD)
Check outdoor service
exceeds 115 °C.
valves (gas side, liquid
side) to confirm full
opening.
Check outdoor PMV for
clogging.
Check resistance
characteristics of TD
sensor.
Check for insufficiency in
refrigerant quantity.
Check for defect in 4-way
valve.
Check leakage of SV4
circuit.
Check SV4 circuit (wiring
or installation error in SV4).
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Table of Contents
Troubleshooting
