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Check code
Outdoor 7-segment display
Controller
Check
Sub-code
code
L05
—
—
No. of priority
indoor units
L06
L06
L07
—
—
L08
L08
—
L09
—
—
L10
L10
—
L17
L17
—
L20
—
—
L23
—
—
L28
L28
—
P.C.board
Compressor Fan Motor
1
2
1
01
O
02
O
03
O
O
08
O
09
O
O
0A
O
O
0B
O
O
O
10
11
O
12
O
13
O
O
18
O
L29
L29
19
O
O
1A
O
O
1B
O
O
O
Circle (O):
Trouble P.C. board
00
Location
Description
of
detection
I/F
Duplicated
priority indoor
unit (as
displayed on
priority indoor
unit)
I/F
Duplicated
priority indoor
unit (as
displayed on
indoor unit other
than priority
indoor unit)
Indoor unit
Connection of
group control
cable to
standalone
indoor unit
Indoor unit
Indoor group /
addresses not
set
Indoor unit
Indoor capacity
not set
I/F
Outdoor
capacity not set
I/F
Outdoor model
incompatibility
trouble
Network
Duplicated
adaptor
central control
Indoor unit
address
I/F
SW setting
trouble
I/F
Too many
outdoor units
connected
I/F
Trouble in No.
of P.C. board
2
O
O
O
O
O
O
O
O
I/F
The number of
inverter P.C.
boards is
abnormal.
Check code detection
System status
condition(s)
All stop
More than one indoor units
have been set up as priority
indoor unit.
All stop
More than one indoor units
have been set up as priority
indoor unit.
Stop of
There is at least one
corresponding
standalone indoor unit to
unit
which group control cable is
connected.
Stop of
Address setting has not
corresponding
been performed for indoor
unit
units.
Stop of
Capacity setting has not
corresponding
been performed for indoor
unit
unit.
All stop
Initial setting of I/F P.C.
board has not been
implemented.
All stop
Outdoor unit that cannot be
connected is connected.
All stop
There is duplication in
central control address
setting.
All stop
Outdoor P.C. board (I/F)
does not operate normally.
All stop
There are more than 5
outdoor units.
All stop
Insufficient number of P.C.
board are detected when
power is turned on.
All stop
When there is much number
of an inverter P.C. board to
model setting of an interface
P.C. board.
- 190 -
Check items (locations)
• Check display on priority
indoor unit.
• Check displays on priority
indoor unit and outdoor
unit.
• Check indoor addresses.
• Check indoor addresses.
Note:
This code is displayed
when power is turned on
for the first time after
installation.
Set indoor capacity. (DN =
11)
• Check model setting of
P.C. board for servicing
outdoor I/F P.C. board.
• Check the model name of
the outdoor unit.
• Check central control
addresses.
• Check switch setting of
outdoor P.C. board (I/F).
• Check No. of outdoor units
connected (Only up to 5
units per system allowed).
• Check communication
lines between outdoor
units.
• Check for failure in outdoor
P.C. board (I/F).
• Check model setting of
P.C. board for servicing
outdoor I/F P.C. board.
• Check connection of UART
communication connector.
• Check compressor P.C.
board, fan P.C. board, and
I/F P.C. board for failure.
• Check I/F P.C. board
exchange has been
correctly performed as a
procedure.
• Check for failure in I/F P.C.
board.
• Check for inverter P.C.
board for compressors and
inverter P.C. board for fan
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Table of Contents
Troubleshooting
