Toshiba MMD-AP0481HF2UL Service Manual page 68

Check code
Main
Outdoor 7-segment display
remote
Check
Sub-code
control
code
No. of priority indoor
units
L06 L06
L07 — —
L08 L08 —
L09 — —
L10 L10 —
L20 — —
L23 — —
L28 L28 —
A3- Fan-
Sub-
IPDU IPDU
code
1 2 3 1
01 O
02 O
03 O O
04 O
05 O O
06 O O
07 O O O
08 O
09 O O
0A O O
L29 L29
0B O O O
0C O O
0D O O O
0E O O O
0F O O O O
11 O
12 O
13 O O
18 O
19 O O
1A O O
1B O O O
Circle (O): Faulty IPDU
Detected indoor
address
L30 L30
— L31 —
P01 — —
Location
of
Description
detection
I/F Duplicated
priority indoor
unit (as
displayed on
indoor unit other
than priority
indoor unit)
Indoor Connection of
unit group control
cable to
standalone
indoor unit
Indoor Indoor group /
unit addresses not
set
Indoor Indoor capacity
unit not set
I/F Outdoor
capacity not set
Network Duplicated
adaptor central control
Indoor unit address
I/F SW setting
mistake
I/F Too many
outdoor units
connected
I/F Trouble in No.
of IPDUs
2
O
O
O
O
O
O
O
Indoor External
unit interlock of
indoor unit
I/F Extended IC
trouble
Indoor Indoor fan
unit motor trouble
Trouble detection
System status
condition(s)
All stop More than one indoor units have
been set up as priority indoor unit.
Stop of There is at least one standalone
corresponding indoor unit to which group control
unit 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 Outdoor P.C. board (I/F) does not
operate normally.
All stop There are more than three outdoor
units.
All stop Insufficient number of IPDUs are
detected when power is turned on.
Stop of • Signal is present at external
corresponding trouble input terminal (CN080) for
unit 1 minute.
Continued There is part failure in P.C. board
operation (I/F).
Stop of
corresponding
unit
– 68 –
Check items (locations)
• 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 switch setting of Bit 3 and
4 of SW17 in outdoor P.C. board
(I/F).
• 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).
• 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.
When external device is
connected to CN080 connector:
1) Check for defect in external
device.
2) Check for defect in indoor P.C.
board.
When external device is not
connected to CN080 connector:
1) Check for defect in indoor P.C.
board.
Check outdoor P.C. board
(I/F).
• Check the lock of fan motor
(AC fan).
• Check wiring.