Figure 4-274 Pressure/Temperature Cable Terminals
5. If the integrity of the cable is in question, disconnect the compressor controller cable from the
pressure/temperature sensor and proceed to the next step.
6. Place the leads on Terminal 1 & 3 of the pressure/temperature sensor. Refer to Figure 4-275
Pressure/Temperature Sensor Pin Locations.
o
The temperature sensor is a 10KΩ @ 77°F (25°C) NTC thermistor. The resistance value should
correspond to Figure 4-273 Temperature vs. Resistance on page 246
To verify pressure reading, compare the readout of the Service Monitoring Tools software to a calibrated gauge.
Discharge and Interstage pressure reading should be within 50 kPa (7.25 psig). Suction pressure reading should be
within 17 kPa (2.5 psig).
Figure 4-275 Pressure/Temperature Sensor Pin Locations
7. Install the top covers. Refer to Section 4.1 Compressor Covers on page 52.
8. Return the compressor to normal operation.
4.32.4 Pressure/Temperature Sensor Removal and Installation
4.32.4.1 Suction Pressure/Temperature Sensor Removal
1. Isolate the compressor power.
2. Isolate the compressor and recover the refrigerant according to industry standards. Refer to Section 3.1
Refrigerant Containment on page 41.
3. Disconnect the sensor connector.
4. Using a deep 15/16" socket, remove the sensor from the IGV Housing Assembly.
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