137
Check code
Main
remote
controller
E12
E15
E16
E18
E19
E20
E23
Outdoor 7-segment display
Check code
Sub-code
E12 01: Indoor/outdoor
communication
02: Between outdoors
communication
E15 —
E16 00: Capacity over
01 to: No. of connected units
——
E19 00: No header unit
02: Two or more header units
E20 01: Connection of outdoor of
other line
02: Connection of indoor of
other line
E23 —
AI-NET
central control
remote controller
42
42
89
97, 99
96
42
15
Detected
position
I/F
I/F
I/F
Indoor
unit
I/F
I/F
I/F
Check code name
Automatic address start error
No corresponding indoor unit
during automatic address
No. of connected indoor units /
Capacity over
Communication error between
indoor header and follower
units
Outdoor header unit quantity
error
Other line unit connected
during automatic address
Communication sending error
between outdoor units
Status
All stop
All stop
All stop
Corresponding
unit only stops.
All stop
All stop
All stop
Error detection condition
• When indoor automatic
address started, other
refrigerant circuit system was
setting automatic address.
• When outdoor automatic
address started, indoor
automatic address was
executed.
Indoor unit is not found when
indoor automatic address start
was set up.
• Total capacity of indoor units
exceeded 135% of total
outdoor capacity.
• No. of connected indoor units
are more than 48 units.
[Note]
If this code appears after backup
setup of outdoor unit trouble, set
up “No capacity-over detection”.
<Setup method of “No
capacity-over detection”>
Turn on SW09/Bit 2 on I/F P.C.
board of outdoor header unit.
Regular communication between
indoor header and follower units .
• There are multiple outdoor
header units in 1 line.
• There is none of outdoor
header unit in 1 line.
Unit of other line was connected
when indoor automatic address
started.
Transmission of other outdoor
unit was unavailable for 30
seconds or more.
Check item (position)
• Setup the address again after disconnecting
communication connection with other refrigerant
circuit system.
• Check the communication line connection
between indoor and outdoor.
• Check the electric power line error in indoor.
• Check the noise of surrounding devices.
• Power failure
• Check indoor P.C. board error.
• Check the connection capacity of indoor unit.
• Check the HP capacity of indoor unit.
• Check the indoor/outdoor capacity setup
• Check the No. of connected indoor units.
• Check the outdoor I/F P.C. board error
• Check cable of the remote controller.
• Check power cabling of indoor.
• Check P.C. board of indoor.
The outdoor unit connected with communication
cable between indoor and outdoor (U1.U2) is the
outdoor header unit.
• Check connection of communication line
between indoor and outdoor.
• Check outdoor P.C. board(I/F) error.
Separate the cable between lines according to
automatic address setup method in
“Address setup”.
• Check the power of outdoor unit. (Is the power
turned on?)
• Check connection of communication wire or
disconnection between outdoor units.
• Check the connector for communication on
outdoor P.C. board.
• Check outdoor P.C. board (I/F) error.
• Check the end terminal resistance setup for
communication between outdoor units.
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