3. Disconnect the SCR temperature sensor cable plug (INTER - J17) from the Backplane Board.
Figure 4-146 J17 Connector
4. Using a multimeter set for resistance measurements, place the leads in terminal 1 and 2 of the cable
plug. Refer to Figure 4-146 J17 Connector. The value should correspond with a negative temperature
coefficient (NTC) thermistor 10KΩ @ 70°F (21° C). Refer to Figure 4-273 Temperature vs. Resistance on
page 246.
4.18.2.6 SCR Temperature Sensor General Removal
NOTE
The SCR Temperature Sensor is NOT in the refrigerant circuit and does not require refrigerant recovery.
1. Isolate the compressor power as described Section 1.8 Electrical Isolation on page 22.
2. Remove the Soft Start. Refer to Section 4.14.3 Soft Start Removal and Installation on page 117.
3. Continue to Section 4.18.2.7 SCR Temperature Sensor Removal - TTS300/TGS230 for TT300/TG230
compressors and for all other TT/TG compressors, continue to Section 4.18.2.8 SCR Temperature Sensor
Removal - TTS/TGS/TTH/TGH Rev. F and Earlier (Except TTS300/TGS230) on page 146.
4.18.2.7 SCR Temperature Sensor Removal - TTS300/TGS230
1. Disconnect compressor controller cable from the Discharge P/T sensor and move the cable aside to
access the SCR temperature sensor. Refer to Figure 4-147 SCR Temperature Sensor location -
TTS300/TGS230.
Figure 4-147 SCR Temperature Sensor location - TTS300/TGS230
2. Remove the Main Voltage Input Terminal Block. Refer to Section 4.11.2.2 Specific 3-Phase Main Voltage
Input Terminal Block Removal - TTS300/TGS230 on page 102.
3. Disconnect the SCR Temperature Sensor from the Compressor Controller Harness and gently pull the
sensor cable under the SCR Cooling Manifold from the discharge side of the compressor. Refer to
Figure 4-148 SCR Temperature Sensor Connector - TTS300/TGS230 on page 146.
M-SV-001-EN Rev. H-1/23/2023 Page 145 of 294
Summary of Contents for Turbocor TT Series
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