Toshiba MMU-AP0072H2UL Service Manual page 96

Check code
Outdoor 7-segment display
Main
remote
Check code Sub-code
controller
L03 –
L04 L04
L05 –
No. of priority
indoor units
L06 L06
L07 –
L08 L08
L09 –
L10 L10
L20 –
L28 L28
Location
of Description
detection
Indoor Duplicated
unit indoor header
unit
–
I/F Duplicated
outdoor line
–
address
I/F Duplicated
priority indoor
unit (as
–
displayed on
priority indoor
unit)
I/F Duplicated
priority indoor
unit (as
displayed on
indoor unit other
than priority
indoor unit)
Indoor Connection of
unit group control
– cable to stand-
alone indoor
unit
Indoor Indoor group /
unit addresses not
set
–
Indoor Indoor capacity
– unit not set
I/F Outdoor
capacity not set
–
Duplicated
Indoor central control
– unit address
I/F Too many
outdoor units
connected
–
Error detection
System status
condition(s)
Stop of There is more than one
corresponding header unit in group.
unit
All stop There is duplication in line
address setting for outdoor
units belonging to different
refrigerant piping systems.
All stop More than one indoor unit
has been set up as priority
indoor unit.
All stop More than one indoor unit
have been set up as priority
indoor unit.
Stop of There is at least one stand-
corresponding alone indoor unit to which
unit group control cable is
connected.
Stop of Address setting has not been
corresponding performed for indoor units.
unit
Stop of Capacity setting has not been
corresponding performed for indoor unit.
unit
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.
All stop There is duplication in central
control address setting.
All stop There are more than four
outdoor units.
96
Check items (locations)
• Check indoor addresses.
• Check for any change
made to remote controller
connection (group/
individual) since indoor
address setting.
• Check line addresses.
• Check display on priority
indoor unit.
• Check displays on priority
indoor unit and outdoor
unit.
• Check indoor addresses.
• Check indoor addresses.
Note:
This code is displayed
when power is turned on
for the first time after
installation.
Set indoor capacity. (DN =
11)
Check model setting of P.C.
board for servicing outdoor
I/F P.C. board.
• Check central control
addresses.
• Check network adaptor
P.C. board.
• 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).