Toshiba MMU-AP0074YH-E(-TR) Service Manual page 82

Check code
Outdoor 7-segment display
Main
remote
Check
controller
Sub-code
code
SMMS (Series 1)
01: A3-IPDU1
error
02: A3-IPDU2
error
03: A3-IPDU1/
A3- IPDU2 error
04: Fan IPDU
error
05: A3-IPDU1 +
Fan IPDU error
06: A3-IPDU2 +
Fan IPDU error
07: All IPDU
error or
Communication
error between
IPDU and I/F
circuit board
or Outdoor I/F
circuit board
error
E31 E31
SMM-i (Series 4)
A3-IPDUFan
IPDU
1 2 3
01
O
02
O
03 O O
04 O
05
O O
06
O O
07
O O O
08
O
09 O O
0A O O
0B O
O O
0C
O O
0D
O O O
0E
O O O
0F O O O O
80
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
error
Indoor unit Indoor TCJ sensor
error
Indoor unit Indoor TC2 sensor
error
Indoor unit Indoor TC1 sensor
error
I/F TD1 sensor error
I/F TD2 sensor error
I/F TE1/TE2 sensor
error
I/F TL sensor error
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 unit or zero (open / short circuit).
Stop of Sensor resistance is infinity
corresponding unit or zero (open / short circuit).
Stop of Sensor resistance is infinity
corresponding unit 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).
– 82 –
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).