Toshiba MMY-MAP0726FT2P-UL - Page 157

Check code
Location
of
detection
Description System status
Check code detection
condition(s)
Check items (locations)
Main
remote
controller
Outdoor 7-segment display
Check
code
Sub-code
L29 L29
I/F
Trouble in No.
of
IPDUs
All stop Insufficient number of IPDUs
are detected when power is
turned on.
•
•
•
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
trouble.
L30 L30
Detected indoor address Indoor
unit
External
interlock of
indoor unit
Stop of
corresponding
unit
• Signal is present at
external trouble input
terminal (CN80) for 1
minute.
When external device is
connected to CN80
connector:
1) Check for trouble 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.
– L31 –
I/F Extended IC
trouble
Continued
operation
There is part failure in P.C.
board (I/F).
Check outdoor P.C. board
(I/F).
P01 – –
Indoor
unit
Indoor fan
motor trouble
Stop of
corresponding
unit
• Check the lock of fan motor
(AC fan).
• Check wiring.
P03 P03 –
I/F Discharge
temperature
TD1 trouble
All stop
Discharge temperature (TD1)
exceeds 239°F (115°C).
• Check outdoor service
valves (gas side, liquid
side) to confirm full
opening.
• Check outdoor PMVs
(PMV1, 3, 4) for clogging.
• Check resistance
characteristics of TD1
sensor.
• Check for insufficiency in
refrigerant quantity.
• Check for defect in 4-way
valve.
• Check for leakage of SV4
circuit.
• Check SV4 circuit (wiring
or installation trouble
in SV41 or SV42).
• Check for SV15 for clogging.
• Check stuck in the check valve
of the circuit which by passes
the main heat exchanger and
sub heat exchanger.
1 2 1
01 ○
02 ○
03 ○ ○
08 ○
09 ○ ○
0A ○ ○
0B ○ ○ ○
A3-IPDU Fan-IPDU
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