Ps Sensor Error; Pd Sensor Error - Toshiba Super MMU-AP0091H Service Manual

Check code name
[F23] / [43]
(d07 / AI-NET)
Is connection of Ps sensor
connector correct?
YES
Are output voltage characteristics
of Ps sensor normal?
YES
Is there no leakage
from SV4 valve?
YES
Replace SV4 valve.
Check code name
[F24] / [43]
(d07 / AI-NET)
It is output voltage error of Pd sensor. Check disconnection of connection of connector (Pd sensor: CN501) circuit
and output voltage of sensor.
If the sensor is normal, replace outdoor I/F P.C. board.
Check code name

Ps sensor error

NO
Connector: CN500, White
NO
1 Pressure (Check joint) by pressure gauge
2 Pressure display on 7-segment display
3 Output voltage of I/F P.C. board
If 1 and 2, 3 are different, an error of pressure sensor itself is considered.
If 2 and 3 are different, check interface P.C. board.
Is not refrigerant by
NO
passed from discharge to
suction of 4-way valve?
YES
Check 4-way valve.
Check code name

Pd sensor error

168
Cause of operation
Output voltage error of Ps sensor
Correct connection of connector.
Sensor error
NO
Check compressor.
Cause of operation
Output voltage error of Pd sensor