Toshiba MMW-UP0271LQ-E - Page 59

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Check code
Location
of
detection
Description System status
Check code detection
condition(s)
Check items (locations)
• Check for connection
trouble involving Ps sensor
and Pd sensor connectors.
• Check connection of Ps
sensor connector.
• Check for failure in Ps
sensor.
• Check for deficiency in
compressive output of
compressor.
• Check for failure in 4-way
valve.
• Check for failure in outdoor
P.C. board (I/F).
• Check for failure in SV4
circuit.
Ps sensor
trouble
I/F All stop Output voltage of Ps
sensor is zero.
F23 F23 —
• Check connection of Pd
sensor connector.
• Check for failure in Pd
sensor.
• Check for failure in outdoor
P.C. board (I/F).
Pd sensor
trouble
I/F All stop Output voltage of Pd sensor
is zero (sensor open-
circuited).
Pd > 4.15MPa despite
compressor having been
turned off.
F24 F24 —
• Check for failure in indoor
P.C. board (trouble
EEPROM)
Other indoor
trouble
Indoor unit Stop of
corresponding
unit
Indoor P.C. board does not
operate normally.
F29 — —
• Check power supply
voltage.
• Check power supply noise.
• Check for failure in outdoor
P.C. board (I/F).
Outdoor
EEPROM
trouble
I/F All stop *1 Outdoor P.C. board (I/F)
does not operate normally.
F31 F31 —
*1 Total shutdown in case of header unit
Continued o
p
eration in case of follower unit
Main
remote
controller
Outdoor 7-segment display
Check
code
Sub-code
• Check connection of high-
pressure Pd sensor
connector.
• Check connection of low-
pressure Ps sensor
connector.
• Check for failure in
pressure sensors Pd and
Ps.
• Check for trouble in
outdoor P.C. board (I/F).
• Check for deficiency in
compressive output of
compressor.
Outdoor
pressure
sensor wiring
trouble (Pd, Ps)
I/F All stop Readings of high-pressure
Pd sensor and low-pressure
Ps sensor are switched.
Output voltages of both
sensors are zero.
F16 F16 —
• 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.
TS1/TS3
sensor trouble
I/F01: TS1 sensor
trouble
03: TS3 sensor
trouble
04:
TS3 sensor
disconnect
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.
F12 F12
• Failure in IPM built-in
temperature sensor
→ Replace Compressor
P.C. board.
TH sensor
trouble
Compressor
P.C. board
1∗: Compressor
1 side
2∗: Compressor
2 side
All stop Sensor resistance is infinity
or zero (open/short circuit).
F13 F13
• Check connection of TF
sensor connector and
wiring.
• Check resistance
characteristics of TF
sensor.
• Check for failure in indoor
P.C. board.
Indoor TF
sensor trouble
Indoor unit Stop of
corresponding
unit
Sensor resistance is infinity
or zero (open/short circuit).
F11 — —
• Check installation of
TE1 and TL1 sensors.
• Check resistance
characteristics of TE1 and
TL1 sensors.
• Check for outdoor P.C.
board (I/F) trouble
Outdoor
temperature
sensor wiring
trouble (TE1,
TL1)
I/F 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.
F15 F15 —
Indoor unit (including Hot Water Module)