Toshiba MMY-MAP0806HT8P Service Manual page 176

Check code
Outdoor 7-segment display
Main
remote
Check
Sub-code
controller
code
A3-IPDU Fan-IPDU
1 2 1
01 ○
02 ○
03 ○ ○
08 ○
09 ○ ○
E31 E31
0A ○ ○
0B ○ ○ ○
80
F01 – –
F02 – –
F03 – –
F04 F04 –
F05 F05 –
01: TE1 sensor error
F06 F06
02: TE2 sensor error
01: TL1 sensor error
02: TL2 sensor error
F07 F07
03: TL3 sensor error
Location
of
detection
I/F
A3-IPDU Fan-IPDU
2 1 2 1 2
10 ○
11 ○ ○
12 ○ ○
13 ○ ○ ○
18 ○ ○
19 ○ ○ ○
1A ○ ○ ○
1B ○ ○ ○ ○
Circle (O): Faulty IPDU
Indoor
unit
Indoor
unit
Indoor
unit
I/F
I/F
I/F
I/F
System
Description
status
IPDU All stop Communication is disrupted
communication between IPDUs (P.C.
error boards) in inverter box.
Communication Communication between
All stop
MCU and Sub MCU stopped.
error between
MCU and Sub
MCU
Indoor TCJ Stop of Sensor resistance is infinity
sensor error corresponding or zero (open/short circuit).
unit
Indoor TC2 Stop of Sensor resistance is infinity
sensor error corresponding or zero (open/short circuit).
unit
Indoor TC1 Stop of Sensor resistance is infinity
sensor error corresponding or zero (open/short circuit).
unit
TD1 sensor All stop Sensor resistance is infinity
error or zero (open/short circuit).
TD2 sensor All stop Sensor resistance is infinity
error or zero (open/short circuit).
TE1/TE2 All stop Sensor resistance is infinity
sensor error or zero (open/short circuit).
TL1/TL2/TL3 All stop Sensor resistance is infinity
sensor error or zero (open/short circuit).
− 175 −
Error detection
Check items (locations)
condition(s)
• 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.
• Operation of power supply
reset (OFF for 60 seconds
or more)
• Outdoor I/F PC board error
check
• 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 TL1/
TL2/TL3 sensor connector.
• Check resistance
characteristics of TL1/TL2/
TL3 sensor.
• Check for defect in outdoor
P.C. board (I/F).