Toshiba Carrier MMU-AP0182H2UL Service Manual page 89

Check code
Outdoor 7-segment display
Main
remote
Check code
Sub-code
controller
A3-IPDU Fan
1
01 O
02
O
03
04
O
05
06
07 O
08
E31 E31
09 O
0A
O
0B
0C
0D O
0E
0F O
Symbol O
signifies site of
IPDU error.
F01 –
F02 –
F03 –
F04 F04
F05 F05
01:
TE1 sensor error
02:
F06 F06 TE2 sensor error
F07 F07
Location
of Description
detection
I/F IPDU
communication
2 3 IPDU
error
O
O
O
O
O O
O O
O
O
O O
O O
O O
O O
O O O
O O O
Indoor Indoor TCJ
unit sensor error
–
Indoor Indoor TC2
unit sensor error
–
Indoor Indoor TC1
unit sensor error
–
I/F TD1 sensor
error
–
I/F TD2 sensor
error
–
I/F TE1/TE2
sensor error
I/F TL sensor error All stop
–
Error detection
System status
condition(s)
All stop Communication is disrupted
between IPDUs (P.C.
boards) in inverter box.
Stop of Sensor resistance is infinity
corresponding or zero (open/short circuit).
unit
Stop of Sensor resistance is infinity
corresponding or zero (open/short circuit).
unit
Stop of Sensor resistance is infinity
corresponding or zero (open/short circuit).
unit
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).
Sensor resistance is infinity
or zero (open/short circuit).
89
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 defect in outdoor
P.C. board (I/F, A3-IPDU
or Fan IPDU).
• Check for external noise.
• Check connection of TCJ
sensor connector and
wiring.
• Check resistance
characteristics of TCJ
sensor.
• Check for defect in indoor
P.C. board.
• Check connection of TC2
sensor connector and
wiring.
• Check resistance
characteristics of TC2
sensor.
• Check for defect in indoor
P.C. board.
• Check connection of TC1
sensor connector and
wiring.
• Check resistance
characteristics of TC1
sensor.
• Check for defect in indoor
P.C. board.
• Check connection of TD1
sensor connector.
• Check resistance
characteristics of TD1
sensor.
• Check for defect in outdoor
P.C. board (I/F).
• Check connection of TD2
sensor connector.
• Check resistance
characteristics of TD2
sensor.
• Check for defect in outdoor
P.C. board (I/F).
• Check connection of TE1/
TE2 sensor connectors.
• Check resistance
characteristics of TE1/TE2
sensors.
• Check for defect in outdoor
P.C. board (I/F).
• Check connection of TL
sensor connector.
• Check resistance
characteristics of TL
sensor.
• Check for defect in outdoor
P.C. board (I/F).