Toshiba MMD- AP0724H2UL, Service Manual

Page: 59 / 84

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Check code
Location
of
detection
Description System status
Error detection
condition(s)
Check items (locations)
Main
remote
controller
Outdoor 7-segment display
Check code
Sub-code
E31 E31
Symbol O
signifies site of
IPDU error.
I/F IPDU
communication
error All stop Communication is disrupted
between IPDUs (P.C.
boards) in inverter box. • Check wiring and
connectors involved in
communication between
IPDU-I/F P.C. board for
bad contact or broken wire.
• Check for defect in outdoor
P.C. board (I/F, A3-IPDU
or Fan IPDU).
• Check for external noise.
F01 – –
Indoor
unit Indoor TCJ
sensor error Stop of
corresponding
unit Sensor resistance is infinity
or zero (open/short circuit). • Check connection of TCJ
sensor connector and
wiring.
• Check resistance
characteristics of TCJ
sensor.
• Check for defect in indoor
P.C. board.
F02 – –
Indoor
unit Indoor TC2
sensor error Stop of
corresponding
unit Sensor resistance is infinity
or zero (open/short circuit). • Check connection of TC2
sensor connector and
wiring.
• Check resistance
characteristics of TC2
sensor.
• Check for defect in indoor
P.C. board.
F03 – –
Indoor
unit Indoor TC1
sensor error Stop of
corresponding
unit Sensor resistance is infinity
or zero (open/short circuit). • Check connection of TC1
sensor connector and
wiring.
• Check resistance
characteristics of TC1
sensor.
• Check for defect in indoor
P.C. board.
F04 F04 –
I/F TD1 sensor
error All stop Sensor resistance is infinity
or zero (open/short circuit). • Check connection of TD1
sensor connector.
• Check resistance
characteristics of TD1
sensor.
• Check for defect in outdoor
P.C. board (I/F).
F05 F05 –
I/F TD2 sensor
error All stop Sensor resistance is infinity
or zero (open/short circuit). • Check connection of TD2
sensor connector.
• Check resistance
characteristics of TD2
sensor.
• Check for defect in outdoor
P.C. board (I/F).
F06 F06
01:
TE1 sensor error
02:
TE2 sensor error I/F TE1/TE2
sensor error All stop Sensor resistance is infinity
or zero (open/short circuit). • Check connection of TE1/
TE2 sensor connectors.
• Check resistance
characteristics of TE1/TE2
sensors.
• Check for defect in outdoor
P.C. board (I/F).
F07 F07 –
I/F TL sensor error All stop Sensor resistance is infinity
or zero (open/short circuit). • Check connection of TL
sensor connector.
• Check resistance
characteristics of TL
sensor.
• Check for defect in outdoor
P.C. board (I/F).
A3-IPDU Fan
IPDU
O
O
O
O
O
O
O
O
2 3 1
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F