Toshiba Carrier MMU-AP0074HPUL, Service Manual

Page: 66 / 105

F07 F07
I/F TL sensor
error All stop Sensor resistance is infinity
or zero (open / short
circuit). Check connection of TL sensor
connector.
Check resistance
characteristics of TL sensor.
Check for defect in outdoor
P.C. board (I/F).
F08
I/F TO sensor
error All stop Sensor resistance is infinity
or zero (open / short
circuit). Check connection of TO
sensor connector.
Check resistance
characteristics of TO sensor.
Check for defect in outdoor
P.C. board (I/F).
F10
Indoor
unit Indoor TA
sensor error Stop of
corresponding
unit Sensor resistance is infinity
or zero (open / short
circuit). Check connection of TA
sensor connector and wiring.
Check resistance
characteristics of TA sensor.
Check for defect in indoor P.C.
board.
F11
Indoor
unit Indoor TF
sensor error Stop of
corresponding
unit Sensor resistance is infinity
or zero (open / short
circuit). Check connection of TF
sensor connector and wiring.
Check resistance
characteristics of TF sensor.
Check for defect in indoor P.C.
board.
F12
I/F TS1 sensor
error All stop Sensor resistance is infinity
or zero (open / short
circuit). Check connection of TS1
sensor connector.
Check resistance
characteristics of TS1 sensor.
Check for defect in outdoor
P.C. board (I/F).
F13
01: Compressor 1
side
02: Compressor 2
side
03: Compressor 3
side IPDU TH sensor
error All stop Sensor resistance is infinity
or zero (open / short
circuit). Defect in IGBT built-in
temperature sensor
→
Replace A3-IPDU P.C.
board.
F15
I/F Outdoor
temperature
sensor wiring
error (TE1,
TL) All stop During compressor
operation in HEAT mode,
TE1 continuously provides
temperature reading
higher than indicated by TL
by at least specified margin
for 3 minutes or more. Check installation of TE1 and
TL sensors.
Check resistance
characteristics of TE1 and TL
sensors.
Check for outdoor P.C. board
(I/F) error.
F16
I/F Outdoor
pressure
sensor wiring
error (Pd, Ps) All stop Readings of high-pressure
Pd sensor and lowpressure
Ps sensor are
switched.
Output voltages of both
sensors are zero. Check connection of high-
pressure Pd sensor connector.
Check connection of lowp-
ressure Ps sensor connector.
Check for defect in pressure
sensors Pd and Ps.
Check for error in outdoor P.C.
board (I/F).
Check for deficiency in
compressive output of
compressor.
F22
I/F TD3 sensor
error All stop Sensor resistance is infinity
or zero. (open / short
circuit) Check connection of TD3
sensor connector.
Check resistance
characteristics of TD3 sensor.
Check for defect in outdoor
P.C. board (I/F).
F23
I/F Ps sensor
error All stop Output voltage of Ps
sensor is zero. Check for connection error
involving Ps sensor and Pd
sensor connectors.
Check connection of Ps sensor
connector.
Check for defect in Ps sensor.
Check for deficiency in
compressive output of
compressor.
Check for defect in 4-way
valve.
Check for defect in outdoor
P.C. board (I/F).
Check for defect in SV4 circuit.
F08
F12
F15
F16
F22
F23
Check code
Location
of
detection
Description System status
Error detection
condition(s)
Check items (locations)
Outdoor 7-segment display
Sub-code
Check
code
Main
remote
controller
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