Toshiba MMY-MAP0804HT8-E Service Manual page 188

Outdoor 7-segment display
Main
remote
Check
controller
code
L29 L29
L30 L30
– L31
P01 –
P03 P03
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Check code
Location
AI-NET central
of
control
detection
remote
Sub-code
controller
I/F
A3-IPDU Fan
1 2 3 IPDU
01 O
02 O
O O
03
O
04
05 O O
06 O O
07 O O O
O
08
CF
O O
09
0A O O
O O O
0B
0C O O
O O O
0D
O O O
0E
0F O O O O
Symbol O
signifies site of
IPDU error.
Detected indoor Indoor
address unit
b6
I/F
– –
Indoor
– 11 unit
I/F
– 1E
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Description System status
Error in No. of All stop Insufficient number of IPDUs
IPDUs are detected when power is
turned on.
External Stop of • Signal is present at
interlock of corresponding external error input
indoor unit unit terminal (CN80) for 1
minute.
Extended IC Continued There is part failure in P.C.
error operation board (I/F).
Indoor fan Stop of
motor error corresponding
unit
Discharge All stop Discharge temperature (TD1)
temperature exceeds 115°C.
TD1 error
187
Error detection
Check items (locations)
condition(s)
• 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 PMVs
(PMV1, 2, 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 error in
SV41, SV42 or SV43).