Toshiba MCY-MHP0404HS-E Service Manual page 113

Check code
Outdoor 7-segment display
Main
remote
Check
Sub-code
controller
code
L07 – –
L08 L08 –
L09 – –
L10 L10 –
L20 – –
Fan IPDU
A3-
1
IPDU
(Upper)
01 O
02 O
03 O O
04
05 O
06 O
07 O O
Circle (O): Troubled IPDU
(*) Concerning the "00" auxiliary
L 2 9 L 2 9
code
1) The wrong model setting
for the interface P.C. board
was used when the board
was replaced with the service
P.C. board.
In such a case, the sub-codes
"08" to "0F" for L29, which are
not included in the table above,
may be displayed.
2) The wrong model setting for
the fan IPDU P.C. board was
used when the board was
replaced with the service
P.C. board.
Detected
indoor address
L30 L30
– L31 –
P01 – –
P03 P03 –
AMP Air Conditioning
Location
of Description
detection
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
AI-NET Duplicated
Indoor central control
unit address
I/F Trouble in No. of
2
IPDUs
(Lower)
O
O
O
O
Indoor External
unit interlock of
indoor unit
I/F Extended IC
trouble
Indoor Indoor fan motor
unit trouble
I/F Discharge
temperature TD
trouble
Check code detection
System status
condition(s)
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 Insufficient number of IPDUs
are detected when power is
turned on.
Stop of Signal is present at
corresponding external error input
unit terminal (CN80) for 1
minute.
Continued There is part failure in P.C.
operation board (I/F).
Stop of
corresponding
unit
All stop Discharge temperature (TD)
exceeds 115 °C.
123 112
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Check items (locations)
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 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 CN80
connector:
1) Check for defect in
external device.
2) Check for trouble in indoor
P.C. board.
When external device is not
connected to CN80
connector:
1) Check for trouble in indoor
P.C. board.
Check outdoor P.C. board
(I/F).
Check the lock of fan motor
(AC fan).
Check wiring.
Check outdoor service
valves (gas side, liquid
side) to confirm full
opening.
Check outdoor PMV for
clogging.
Check resistance
characteristics of TD
sensor.
Check for insufficiency in
refrigerant quantity.
Check for trouble in 4-way
valve.
Check leakage of SV4
circuit.
Check SV4 circuit (wiring
orinstallation trouble in SV4).
Check leakage of SV5
circuit.