Toshiba MMD-AP0076BHP1-E Service Manual page 69

Check code
Outdoor 7-segment display
Main
remote
Check
Sub-code
controller
code
F07 F07
F08 F08
F10
F11
F12 F12
01: Compressor 1
side
02: Compressor 2
F13
side
03: Compressor 3
side
F15 F15
F16 F16
F22 F22
F23 F23
Location
Description System status
of
detection
I/F TL sensor All stop
error
I/F TO sensor All stop
error
Indoor Indoor TA Stop of
unit sensor error corresponding
unit
Indoor Indoor TF Stop of
unit sensor error corresponding
unit
I/F TS1 sensor All stop
error
IPDU TH sensor All stop
error
I/F Outdoor All stop
temperature
sensor wiring
error (TE1,
TL)
I/F Outdoor All stop
pressure
sensor wiring
error (Pd, Ps)
I/F TD3 sensor All stop
error
I/F Ps sensor All stop
error
– –
69
Error detection
Check items (locations)
condition(s)
Sensor resistance is infinity Check connection of TL sensor
or zero (open / short connector.
circuit). Check resistance
characteristics of TL sensor.
Check for defect in outdoor
P.C. board (I/F).
Sensor resistance is infinity Check connection of TO
sensor connector.
or zero (open / short
circuit). Check resistance
characteristics of TO sensor.
Check for defect in outdoor
P.C. board (I/F).
Sensor resistance is infinity Check connection of TA
or zero (open / short sensor connector and wiring.
circuit). Check resistance
characteristics of TA sensor.
Check for defect in indoor P.C.
board.
Sensor resistance is infinity Check connection of TF
or zero (open / short sensor connector and wiring.
circuit). Check resistance
characteristics of TF sensor.
Check for defect in indoor P.C.
board.
Sensor resistance is infinity Check connection of TS1
or zero (open / short sensor connector.
circuit). Check resistance
characteristics of TS1 sensor.
Check for defect in outdoor
P.C. board (I/F).
Sensor resistance is infinity Defect in IGBT built-in
temperature sensor
or zero (open / short
circuit). → Replace A3-IPDU P.C.
board.
During compressor Check installation of TE1 and
TL sensors.
operation in HEAT mode,
TE1 continuously provides Check resistance
temperature reading characteristics of TE1 and TL
higher than indicated by TL sensors.
by at least specified margin Check for outdoor P.C. board
for 3 minutes or more. (I/F) error.
Readings of high-pressure Check connection of high-
Pd sensor and lowpressure pressure Pd sensor connector.
Ps sensor are Check connection of lowp-
switched. ressure Ps sensor connector.
Output voltages of both Check for defect in pressure
sensors Pd and Ps.
sensors are zero.
Check for error in outdoor P.C.
board (I/F).
Check for deficiency in
compressive output of
compressor.
Sensor resistance is infinity Check connection of TD3
sensor connector.
or zero. (open / short
circuit) Check resistance
characteristics of TD3 sensor.
Check for defect in outdoor
P.C. board (I/F).
Output voltage of Ps Check for connection error
involving Ps sensor and Pd
sensor is zero.
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.