117
Check code
Outdoor 7-segment display
Wired
remote
controller Check code
Auxiliary code
AI-NET
central control
remote controller
Detected
position
Check code name
Status
Error detection condition
Check item (position)
E12
E12
01: Indoor/outdoor
communication
02: Between outdoors
communication
42
I/F
Automatic address
start error
All stop
• When indoor automatic address started, other
refrigerant circuit system was setting automatic address.
• When outdoor automatic address started, indoor
automatic address was executed.
• Setup the address again after disconnecting
communication connection with other refrigerant circuit
system.
E15
E15
—
42
I/F
No corresponding
indoor unit during
automatic address
All stop
Indoor unit is not found when indoor automatic address
start was set up.
• 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.
E16
E16
00: Capacity over
01 to: No. of connected units
89
I/F
No. of connected
indoor units / Capacity
over
All stop
• 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.
• 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
E18
—
—
97, 99
Indoor
unit
Communication error
between indoor header
and follower units
Corresponding
unit only stops.
Regular communication between indoor header and
follower units
• Check cable of the remote controller.
• Check power cabling of indoor.
• Check P.C. board of indoor.
E19
E19
00: No header unit
02: Two or more header units
96
I/F
Outdoor unit quantity
error
All stop
• There are multiple outdoor units in 1 line.
• There is none of outdoor unit in 1 line.
The outdoor unit connected with communication cable
between indoor and outdoor (U1.U2) is the outdoor unit.
• Check connection of communication line between
indoor and outdoor.
• Check outdoor P.C. board(I/F) error.
E20
E20
01: Connection of outdoor of
other line
02: Connection of indoor of
other line
42
I/F
Other line unit
connected during
automatic address
All stop
Unit of other line was connected when indoor automatic
address started.
Separate the cable between lines according to automatic
address setup method in “Address setup”.
E23
E23
—
15
I/F
Communication
sending error between
outdoor units
All stop
Transmission of other outdoor unit was unavailable for 30
seconds or more.
In this model, only one outdoor unit is provided to one
refrigerant line. Be sure to check there is no
communication connection with outdoor unit in the other
refrigerant line.
E25
E25
—
15
I/F
Duplicated outdoor
follower address setup
All stop
Outdoor addresses manually set up are duplicated.
Note)
Do not set up the outdoor address manually.
E31
E31
01: Comp IPDU error
02: Fan 1 IPDU error
03: Comp + Fan 1 IPDU error
04: Fan 2 IPDU error
05: Comp + Fan 2 IPDU error
06: Fan 1 + Fan 2 IPDU error
07: All IPDU error or
communication error
between IPDU and I/F P.C.
board or outdoor I/F P.C.
board error
CF
I/F
IPDU communication
error
All stop
Communication of each IPDU (P.C. board) in inverter box
interrupted.
• Check connection of communication connector and
disconnection between IPDU and I/F P.C. board.
• Check outdoor P.C. board (I/F, IPDU, Fan IPDU) error.
• Check external noise.