Toshiba MCY-MHP0404HT-C Service Manual page 112

Check code
Outdoor 7-segment display
Main
remote
Check
Sub-code
controller
code
L07 – –
L08 L08 –
L09 – –
L10 L10 –
L20 – –
Fan IPDU
A3-
1 2
IPDU
(Upper) (Lower)
01 O
O
02
03 O O
04 O
05 O O
06 O O
07 O O O
Circle (O): Faulty 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 –
Location
of Description System status
detection
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
AI-NET Duplicated All stop
Indoor central control
unit address
I/F Error in No. of All stop
IPDUs
Indoor External Stop of
unit interlock of corresponding
indoor unit unit
I/F Extended IC Continued
error operation
Indoor Indoor fan motor Stop of
unit error corresponding
unit
I/F Discharge All stop
temperature TD
error
Error detection
condition(s)
There is at least one stand-
alone indoor unit to which
group control cable is
connected.
Address setting has not been
performed for indoor units.
Capacity setting has not been
performed for indoor unit.
Jumper wire provided on P.C.
board for servicing I/F P.C.
board has not been removed
as required for given model.
There is duplication in central
control address setting.
Insufficient number of IPDUs
are detected when power is
turned on.
• Signal is present at
external error input
terminal (CN80) for 1
minute.
There is part failure in P.C.
board (I/F).
Discharge temperature (TD)
exceeds 115 °C.
111
123
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 defect in indoor
P.C. board.
When external device is not
connected to CN80
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.
• 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 defect in 4-way
valve.
• Check leakage of SV4
circuit.
• Check SV4 circuit (wiring
or installation error in SV4).
• Check leakage of SV5
circuit.