Toshiba MMD- AP0724H2UL, Service Manual

Page: 64 / 84

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Check code
Location
of
detection
Description System status
Error detection
condition(s)
Check items (locations) Main
remote
controller
Outdoor 7-segment display
Check code Sub-code
L03 – –
Indoor
unit Duplicated
indoor header
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.
L04 L04 –
I/F Duplicated
outdoor line
address All stop There is duplication in line
address setting for outdoor
units belonging to different
refrigerant piping systems. • Check line addresses.
L05 – –
I/F Duplicated
priority indoor
unit (as
displayed on
priority indoor
unit) All stop More than one indoor unit
has been set up as priority
indoor unit. • Check display on priority
indoor unit.
L06 L06
No. of priority
indoor units I/F Duplicated
priority indoor
unit (as
displayed on
indoor unit other
than priority
indoor unit) All stop More than one indoor unit
have been set up as priority
indoor unit. • Check displays on priority
indoor unit and outdoor
unit.
L07 – –
Indoor
unit Connection of
group control
cable to stand-
alone 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.
L08 L08 –
Indoor
unit Indoor group /
addresses not
set 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.
L09 – –
Indoor
unit Indoor capacity
not set Stop of
corresponding
unit Capacity setting has not been
performed for indoor unit. Set indoor capacity. (DN =
11)
L10 L10 –
I/F Outdoor
capacity not set 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.
L20 – –
Indoor
unit
Duplicated
central control
address All stop There is duplication in central
control address setting. • Check central control
addresses.
• Check network adaptor
P.C. board.
L28 L28 –
I/F Too many
outdoor units
connected All stop There are more than four
outdoor units. • Check No. of outdoor units
connected (Only up to 4
units per system allowed).
• Check communication
lines between outdoor
units.
• Check for defect in outdoor
P.C. board (I/F).