MULTI TYPE

Check code Check code name
Cause
[E15] / [42]
(AI-NET)
No corresponding indoor unit
during automatic address
1. Communication line connection error between
indoor and outdoor
2. Indoor power system error
3. Noise from surrounding devices
4. Power failure
5. Indoor P.C. board error
Is communication
line between indoor
and outdoor
normal?
Yes
No
Correct communication line.
Is connection of
CN40 connector on
indoor P.C. board
correct?
No
Correct connection of
connector.
Yes
Is
connection of CN01
connector on I/F P.C. board
of header outdoor unit
correct?
No
Correct connection of
connector.
Yes
Is there any connection
error of power wire?
Yes
Correct power wire.
No
Did a power failure
occur?
Yes
Set up address again after
resetting power supply.
No
Is there no noise source?
Yes
Eliminate noise.
No
Set up address again after
resetting power supply.
Check code Check code name
Cause
[E09] / [99]
(AI-NET)
Duplicated header remote
controller
Setup of header remote controller is duplicated.
Are two remote
controllers set up as two
header remote
controllers?
Yes
Set up one controller as the header and
the other follower.
(Remote controller address connector)
No
Check remote controller P.C. board.
Failure ➝ Replace
Check code Check code name
Cause
[E10] / [CF]
(AI-NET)
Communication error between
indoor MCUs.
Indoor P.C. board error.
Is there any trouble on
power line?
Yes
Check power voltage. Improve the
line condition. Eliminate noise, etc.
No
Check indoor control P.C. board.
Failure ➝ Replace
Check code Check code name
Cause
[E12] / [42]
(AI-NET)
Automatic address start error
1. Starting automatic addressing of indoor units during
automatic addressing in another refrigerant line.
(Sub-code: 01)
2. Starting automatic addressing of outdoor units
during automatic addressing of indoor units
(Sub-code: 02)
Sub-code: 01: Communication between indoor and outdoor 02: Communication between outdoor units
Are U1, U2, U3, and
U4 connectors
connected?
No
Yes
Disconnect connector connection
of U1, U2, U3, and U4.
Turn on power of outdoor unit
again.
Set up address again.
(Refer to “7-4-3. Address Setup
Procedure”.)
197