Toshiba MMD-AP0726HP-UL Service Manual page 67

Check code
Outdoor 7-segment display
Main
remote
Check
Sub-code
control
code
L02 L02 –
L03 – –
L04 L04 –
L05 – –
No. of priority indoor units
L06 L06
L07 – –
L08 L08 –
L09 – –
L10 L10 –
L20 – –
L23 – –
L28 L28 –
Location
of Description System status
detection
Indoor Outdoor units Stop of
unit
model corresponding
disagreement unit
trouble
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
Network
Duplicated All stop
adaptor
central control
address
Indoor
unit
SW setting
I/F All stop
mistake
I/F Too many All stop
outdoor units
connected
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Trouble detection
Check items (locations)
condition(s)
In case of different outdoor • Check outdoor unit model.
unit (Not corresponded to
(Check whether the
Air to Air Heat Exchanger
outdoor unit corresponds
type)
to Air to Air Heat
Exchanger type or not.)
There are more than one
• Check indoor addresses.
Check for any change
header units in group.
•
made to remote control
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 units • Check display on priority
have been set up as priority
indoor unit.
indoor unit.
More than one indoor units • 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:
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 .
Outdoor P.C. board (I/F)
Check switch setting of
•
does not operate normally. Bit 3 and 4 of SW17 in
outdoor P.C. board (I/F).
There are more than three
• Check No. of outdoor units
connected (Only up to 3
outdoor units.
units per system allowed).
• Check communication
lines between outdoor
units.
• Check for defect in outdoor
P.C. board (I/F).
This code is displayed
when power is turned on
for the first time after
installation.