Toshiba MMU-UP0071MH-UL Service Manual page 103

Check code
Main Outdoor 7-segment display
remote
Check
Sub-code
controller
code
F05 F05 —
01: TE1 sensor
trouble
02: TE2 sensor
trouble
F06 F06
03: TE3 sensor
trouble
01: TL1 sensor
trouble
02: TL2 sensor
F07 F07
trouble
03: TL3 sensor
trouble
F08 F08 —
01: TG1 sensor
trouble
02: TG2 sensor
F09 F09
trouble
03: TG3 sensor
trouble
F10 — —
F11 — —
01: TS1 sensor
trouble
03: TS3 sensor
trouble
F12 F12 04: TS3 sensor
disconnection
1∗: Compressor
1 side
F13 F13
2∗: Compressor
2 side
F15 F15 —
Location
Description
of
detection
I/F TD2 sensor
trouble
I/F TE1/TE2/TE3
sensor trouble
I/F TL1/TL2/TL3
sensor trouble
I/F TO sensor
trouble
I/F TG1/TG2/TG3
sensor trouble
Indoor unit Indoor TA
sensor trouble
Indoor unit Indoor TF
sensor trouble
I/F TS1/TS3
sensor trouble
Compressor TH sensor
P.C. board trouble
I/F Outdoor
temperature
sensor wiring
trouble (TE1,
TL1)
Check code detection
System status
condition(s)
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 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).
• When TS3 detects an
unusual temperature
during compressor
operation and PMV4
operation in cooling mode.
All stop Sensor resistance is infinity
or zero (open/short circuit).
All stop During compressor
operation in HEAT mode,
TL1 continuously provides
temperature reading higher
than indicated by TL1 by at
least specified margin for 3
minutes or more.
– 103 –
Check items (locations)
• Check connection of TD2
sensor connector.
• Check resistance
characteristics of TD2
sensor.
• Check for failure in outdoor
P.C. board (I/F).
• Check connection of TE1/
TE2/TE3 sensor
connectors.
• Check resistance
characteristics of TE1/TE2/
TE3 sensors.
• Check for failure 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 failure in outdoor
P.C. board (I/F).
• Check connection of TO
sensor connector.
• Check resistance
characteristics of TO
sensor.
• Check for failure in outdoor
P.C. board (I/F).
• Check connection of TG1/
TG2/TG3 sensor connectors.
• Check resistance
characteristics of TG1/TG2
/TG3 sensors.
• Check for failure in outdoor
P.C. board (I/F).
• Check connection of TA
sensor connector and
wiring.
• Check resistance
characteristics of TA
sensor.
• Check for failure in indoor
P.C. board.
• Check connection of TF
sensor connector and
wiring.
• Check resistance
characteristics of TF
sensor.
• Check for failure in indoor
P.C. board.
• Check connection of TS1/
TS3 sensor connector
• Check resistance
characteristics of TS1/TS3
sensor.
• The attachment check of
TS3 sensor.
• Check for failure in indoor
P.C. board.
• Failure in IPM built-in
temperature sensor
→ Replace Compressor
P.C. board.
• Check installation of
TE1 and TL1 sensors.
• Check resistance
characteristics of TE1 and
TL1 sensors.
• Check for outdoor P.C.
board (I/F) trouble