Toshiba MCY-MHP0305HT-C Service Manual page 101

Check code
Location
Outdoor 7-segment display
Main
remote detection
Check
Sub-code
controller
code
Indoor
unit
L07 – –
Indoor
unit
L08 L08 –
Indoor
L09 – – unit
I/F
L10 L10 –
AI-NET
Indoor
L20 – –
unit
I/F
Comp. Fa n
O
01
O
02
O O
03
Circle (O): Faulty IPDU
L 2 9 L 2 9
(*) Concerning the "00" auxiliary
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
"04" to "0F" for L29, which are
not included in the table above,
may be displayed.
Detected Indoor
indoor address unit
L30 L30
I/F
– L31 –
Indoor
P01 – – unit
I/F
P03 P03 –
of Description System status
Connection of Stop of
group control corresponding
cable to stand- unit
alone indoor unit
Indoor group / Stop of
addresses not corresponding
set unit
Indoor capacity Stop of
not set corresponding
unit
Outdoor All stop
capacity not set
Duplicated All stop
central control
address
Error in No. of All stop
IPDUs
External Stop of
interlock of corresponding
indoor unit unit
Extended IC Continued
error operation
Indoor fan motor Stop of
error corresponding
unit
Discharge All stop
temperature TD
error
100
123
Error detection
Check items (locations)
condition(s)
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.
Insufficient number of IPDUs Check model setting of
are detected when power is P.C. board for servicing
turned on. outdoor I/F P.C. board.
Check connection of UART
communication connector.
Check IPDU and I/F P.C.
board for defect.
Signal is present at When external device is
external error input connected to CN80
terminal (CN80) for 1 connector:
minute. 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.
There is part failure in P.C. Check outdoor P.C. board
board (I/F). (I/F).
Check the lock of fan motor
(AC fan).
Check wiring.
Discharge temperature (TD) Check outdoor service
exceeds 115 °C. 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).