Common Sensor Characteristics - Toshiba RAS-107SKV-E5 Technical Handbook

There are eight commonly used sensors in the RAS and RAV systems.
Ta = Return Air Sensor; indoor unit
TL = Liquid Pipe Sensor (fan speed); outdoor unit
Td = Discharge Pipe Sensor; outdoor unit
Ts = Suction
The Ta,Tc,TL and TE sensors all share the same resistance versus temperature characteristic. They differ however
in electrical connections and sensing head style, therefore it is important to quote the full model type number
when ordering any replacement sensors.
The Td sensor has a different resistance characteristic because its sensing range is that much higher than the
others.
Sensor -10
Ta,Tc,TL,TE
60.3 45.3 34.5 26.4 20.5
To, Ts
Td, Tk -
Example for location of Sensors
TD sensor
Twin Rotary
Accumulator
(2500cc)
compressor
(DA220A2F – 20L)
Page 24 of 78
-5 0 5 10
- - - 103
Refrigerant pipe
at gas side
Ø15.9
Packet valve
Ball valve
Outer dia. ØA
Strainer
TS sensor
4-way valve
(STF-0213Z
Heat exchanger
Muffler
Outer side
Ø8, 2 rows, 20 steps
Ø25 × L210
FP1.3 flat fin
Inner side
Ø25 × L180
Ø9.52 row, 30 steps
FP1.5 flat fin

Common Sensor Characteristics

Tc = Coil Sensor; indoor unit
TE = Heat Exchange Sensor (defrost); outdoor unit
To = Ambient
Tk = Oil sensor
15 20 25 30 35
16 12.5 10 8 6.5 5.3 4.3
80.5 63 50 - -
Indoor unit
TCJ sensor
Strainer
Air heat exchanger
Outdoor unit
TO sensor
TE
TL sensor
sensor
40 45 50 55 60
3.6 2.9 2.4
- - 17.9 - -
Distributor
(Strainer incorporated)
TC sensor
Refrigerant pipe
at liquid side
Ø9.5
Packet valve
Packed valve
Outer dia. ØB
PMV
(Pulse Motor Valve)
(UKV-25D22)
Strainer
Distributor
R410A
100 ºC
- KΩ
3.4 kΩ
Min. Max.
5m 50m
2.5kg