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Check code
Outdoor 7-segment displayMain
remote
controller
Check code Sub-code
AI-NET
central control
remote controller
Detected
position
Check code name Status Error detection condition Check item (position)
L06 L06 No. of indoor units with priority 96 I/F Duplicated indoor units with
priority
(Displayed on the unit other
than indoor unit with priority)
All stop Indoor units with priority were
duplicated.
• Check display of indoor unit with priority and outdoor unit.
L07 —— 99 Indoor Group line in individual
indoor unit.
Correspondin
g
unit only stops.
At least one indoor unit connected
to a group existed in the individual
indoor units.
• Check indoor address.
L08 L08 — 99 Indoor Indoor group / address
unset
Correspondin
g
unit only stops.
Address was not yet set up. • Check indoor address.
Note)
After installation, this code is displayed when the power is first
turned on.
L09 —— 46 Indoor Indoor capacity unset Correspondin
g
unit only stops.
Indoor unit capacity was unset. Set up indoor capacity. (DN=11)
L10 L10 — 88 I/F Outdoor capacity unset All stop
On the I/F P.C. board for service,
jumper line was not cut accordin
g
to
the model.
Check model setup on outdoor I/F P.C. board A’ssy for service.
L17 L17 — I/F Inconsistent models of
outdoor units
1 and 2 series outdoor units have
been mixed.
• Check outdoor units.
L18 L18 Corresponding indoor address 8A I/F FS unit system error Correspondin
g
unit only stops.
An indoor unit which is not
connected with a FS unit is
operating without setup of cooling
only mode.
• Check setup of remote controller (DN=[OFF]).
• Check FS unit.
Check pipe connection to FS unit.
(Mispiping between discharge gas and suction gas)
Check miswiring/misinstallation of SVS/SVD valves.
L20 —— 98 AI-NET,
Indoor
Duplicated central control
addresses
All stop Duplicated central control
addresses
• Check central control address.
• Check network adaptor P.C. board. (In case of AI-NET)
L28 L28 — 46 I/F Quantity over of connected
outdoor units
All stop There were more than four outdoor
units.
• Check No. of connected outdoor units.
(Max. 4 units per 1 system)
• Check communication line between outdoor units.
• Check outdoor P.C. board (I/F) error.
L29 L29 01: IPDU1 error
02: IPDU2 error
03: IPDU1, 2 errors
04: Fan IPDU error
05: IPDU1 + Fan IPDU error
06: IPDU2 + Fan 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 quantity error All stop
No. of IPDU units detected when
power was turned on were less.
• Check model setup for outdoor I/F service P.C. board.
• Check connection of UART communication connector.
• Check IPDU, fan IPDU, and I/F P.C. board error.
Note)
UART: Universal Asynchronous Receiver Transmitter
L30 L30 Detected indoor address b6 Indoor Interlock in indoor unit from
outside
Correspondin
g
unit only stops.
• Outside error input terminal
Detected signal to (CN80) for
more than 1 minute
n
Outside device is connected to connector (CN80):
1) Check outside device error.
2) Check indoor P.C. board error.
n
Outside device is not connected to connector (CN80):
1) Check indoor P.C. board error.
— L31 ——I/F Extended IC (Integrated
Circuit) error
Operation
continues.
P.C. board (I/F) parts error
Check indoor (I/F) P.C. board.