Toshiba MMD-AP0724H2UL Service Manual page 64

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