Toshiba MMW-AP0481CHQ-E Service Manual page 54

Check code
Outdoor 7-segment display
Main
remote
Check
controller Sub-code
code
A3-IPDU Fan-IPDU
1 2 1
01 O
02 O
03
O O
08 O
09 O O
0A O O
0B O O O
10
11 O
E31 E31
12 O
13 O O
18
O
19
O O
1A O O
1B O O O
Circle (O): troubled IPDU
80
F01 — —
F02 — —
F03 — —
F04 F04 —
F05 F05 —
01: TE1 sensor trouble
02: TE2 sensor trouble
F06 F06
01: TL1 sensor trouble
F07 F07
F08 F08 —
F10 — —
Location
Description
of
detection
I/F IPDU
2 communication
trouble
O
O
O
O
O
O
O
O
Communication
trouble between
MCU and Sub
MCU
Indoor unit Indoor TCJ
sensor trouble
Indoor unit Indoor TC2
sensor trouble
Indoor unit Indoor TC1
sensor trouble
I/F TD1 sensor
trouble
I/F TD2 sensor
trouble
I/F TE1/TE2 sensor
trouble
I/F TL1 sensor
trouble
I/F TO sensor
trouble
Indoor unit Indoor TA sensor
trouble
Check code detection
System status
condition(s)
All stop Communication is
disrupted between
IPDUs (P.C. boards) in
inverter box.
All stop Communication between
MCU and Sub MCU
stopped.
Stop of Sensor resistance is
corresponding infinity or zero (open/
unit short circuit).
Stop of Sensor resistance is
corresponding infinity or zero (open/
unit short circuit).
Stop of Sensor resistance is
corresponding infinity or zero (open/
unit short circuit).
All stop Sensor resistance is
infinity or zero (open/
short circuit).
All stop Sensor resistance is
infinity or zero (open/
short circuit).
All stop Sensor resistance is
infinity or zero (open/
short circuit).
All stop Sensor resistance is
infinity or zero (open/
short circuit).
All stop Sensor resistance is
infinity or zero (open/
short circuit).
Stop of Sensor resistance is
corresponding infinity or zero (open/
unit short circuit).
– 54 –
Check items (locations)
• Check wiring and connectors
involved in communication
between IPDU-I/F P.C. board for
bad contact or broken wire.
• Check for trouble in outdoor P.C.
board (I/F, A3-IPDU or Fan IPDU).
• Check for external noise.
• Operation of power supply reset
(OFF for 60 seconds or more)
• Outdoor I/F PC board trouble
check
• Check connection of TCJ sensor
connector and wiring.
• Check resistance characteristics
of TCJ sensor.
• Check for trouble in indoor P.C.
board.
• Check connection of TC2 sensor
connector and wiring.
• Check resistance characteristics
of TC2 sensor.
• Check for trouble in indoor P.C.
board.
• Check connection of TC1 sensor
connector and wiring.
• Check resistance characteristics
of TC1 sensor.
• Check for trouble in indoor P.C.
board.
• Check connection of TD1 sensor
connector.
• Check resistance characteristics
of TD1 sensor.
• Check for trouble in outdoor P.C.
board (I/F).
• Check connection of TD2 sensor
connector.
• Check resistance characteristics
of TD2 sensor.
• Check for trouble in outdoor P.C.
board (I/F).
• Check connection of TE1/TE2
sensor connectors.
• Check resistance characteristics
of TE1/TE2 sensors.
• Check for trouble in outdoor P.C.
board (I/F).
• Check connection of TL1 sensor
connector.
• Check resistance characteristics
of TL1 sensor.
• Check for trouble in outdoor P.C.
board (I/F).
• Check connection of TO sensor
connector.
• Check resistance characteristics
of TO sensor.
• Check for trouble in outdoor P.C.
board (I/F).
• Check connection of TA sensor
connector and wiring.
• Check resistance characteristics
of TA sensor.
• Check for trouble in indoor P.C.
board.