Toshiba MMY-MAP0804FT7(Z), Service Manual, Page: 187 / 333

– 187 –
Check code
Location
of
detection
System status Description
Error detection
condition(s)
Check items (locations)
Outdoor 7-segment display Main
remote
controller
Check
code
Sub-code
L02 — L02
Indoor unit Stop of
corresponding
unit In case of different outdoor
unit (Not corresponded to Air to
Air Heat Exchanger type) • Check outdoor unit model.
(Check whether the outdoor
unit corresponds to Air to Air
Heat Exchanger type or not.) Outdoor units
model
disagreement
error
— — L03
Indoor unit Stop of
corresponding
unit There is more than one header
unit in group. • Check indoor addresses.
• Check for any change made
to remote controller
connection (group/individual)
since indoor address setting. Duplicated
indoor header
unit
L04 — L04
I/F All stop There is duplication in line
address setting for outdoor
units belonging to different
refrigerant piping systems. • Check line addresses. Duplicated
outdoor line
address
— — L05
I/F All stop More than one indoor unit has
been set up as priority indoor
unit. • Check display on priority
indoor unit. Duplicated priority
indoor unit
(as displayed on
priority indoor unit)
— — L07
Indoor
unit Stop of
corresponding
unit There is at least one stand-
alone indoor unit to which group
control cable is connected. • Check indoor addresses. Connection of
group control
cable to stand-
alone indoor unit
L08 — L08
Indoor
unit Stop of
corresponding
unit Address setting has not been
performed for indoor units. • Check indoor addresses.
Note:
This code is displayed when
power is turned on for the
first time after installation.
Indoor group /
addresses not
set
L10 — L10
I/F All stop Jumper wire provided on P.C.
board for servicing I/F P.C.
board has not been removed as
required for given model. Check model setting of P.C.
board for servicing outdoor I/F
P.C. board. Outdoor capacity
not set
— — L20
Indoor unit All stop There is duplication in central
control address setting. • Check central control
addresses. Duplicated
central control
address
L28 — L28
L29 L29
I/F All stop There are more than 3
outdoor units. • Check No. of outdoor units
connected (Only up to 3 units
per system allowed).
• Check communication lines
between outdoor units.
• Check for defect in outdoor
P.C. board (I/F). Too many
outdoor units
connected
L30 L30
Indoor unit Detected indoor
address Stop of
corresponding
unit • Signal is present at external
error input terminal (CN80) for
1 minute. When external device is
connected to CN80
connector:
1) Check for defect in external
device.
2) Check for defect in indoor
P.C. board.
When external device is not
connected to CN80
connector:
1) Check for defect in indoor
P.C. board.
External interlock
of indoor unit
I/F All stop Insufficient number of IPDUs
are detected when power is
turned on. • Check model setting of
P.C. board for servicing
outdoor I/F P.C. board.
• Check connection of UART
communication connector.
• Check A3-IPDU, fan IPDU,
and I/F P.C. board for defect. Error in No. of
IPDUs
— — L09
Indoor unit Stop of
corresponding
unit
Capacity setting has not been
performed for indoor unit. Set indoor capacity. (DN = 11) Indoor capacity
not set
L06 L06
I/F No. of priority
indoor units All stop More than one indoor unit
have been set up as priority
indoor unit. • Check displays on priority
indoor unit and outdoor unit. Duplicated priority
indoor unit
(as displayed on
indoor unit other
than priority
indoor unit)
Symbol O
signifies site of
IPDU error.
1
O
O
O
O
O
O
O
O
2
O
O
O
O
O
O
O
O
3
O
O
O
O
O
O
O
O
A3-IPDU Fan
IPDU
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
O
O
O
O
O
O
O
O
AMP Air Conditioning www.ampair.co.uk | sales@ampair.co.uk