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S S E E N N S S O O R R S S
Suction Line Pressure
Transducer
This table shows the corresponding voltage and
pressure readings for the Suction Line Pressure
Transducer when measured across pins 7 and 8.
Sump Heat Control
16
Figure 7. Suction Pressure Transducer
Pins 7 (White) & 8 (Black)
9
8
7
6
18
17
16
15
14
A working Suction Pressure Sensor is required for the
following:
•
Start Up (Pressure Limits)
•
Low Pressure, Loss of Charge Protection
•
Indoor Coil Freeze Protection
•
Outdoor EEV Control (Target Super Heat)
•
Diagnostics; Reverse Rotation, Charge Level,
Indoor/Outdoor Airflow
The Suction Pressure Transducer control is measured
across pins 7 and 8 and has an active 0–4.9VDC
transducer input for sensing low suction pressure.
5
4
3
2
1
13
12
11
10
4TWL9048A-SF-1C-EN
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