Toshiba MMD- AP0724H2UL, Service Manual

Page: 60 / 84

– 60 –
Check code
Location
of
detection
Description
System
status
Error detection
condition(s)
Check items (locations) Main
remote
controller
Outdoor 7-segment display
Check code
Sub-code
F08 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 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 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 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 F16 –
I/F Outdoor
pressure
sensor wiring
error (Pd, Ps) All stop Readings of high-pressure
Pd sensor and low-
pressure Ps sensor are
switched.
Output voltages of both
sensors are zero. • Check connection of high-
pressure Pd sensor connector.
• Check connection of low-
pressure 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 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 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.
F24 F24 –
I/F Pd sensor
error All stop Output voltage of Pd
sensor is zero (sensor
open-circuited).
Pd > 601psi (4.15MPa)
despite compressor having
been turned off.
• Check connection of Pd
sensor connector.
• Check for defect in Pd sensor.
• Check for defect in outdoor
P.C. board (I/F).