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What's the max operating pressure for the Trane XR15?
The maximum operating pressure for the Trane XR15 is 410 PSI (high side) and 250 PSI (low side).
[Manual pg. 23]
What refrigerant does it use and what's the charge?
The Trane XR15 uses R-410A refrigerant. Factory charge is 5 lbs 14 oz for the 4TTR5030E unit. Charge varies by model — check your specific unit number.
[Manual pg. 47] [Manual pg. 48]
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I'm getting a 292 fault code on a Lennox XC21. What is it and how do I fix it?
Fault code 292 on the Lennox XC21 indicates a compressor discharge temperature sensor failure.
Troubleshooting steps:
- Check wiring between sensor and control board
- Measure sensor resistance — should be 10kΩ at 77°F
- If out of range, replace sensor (part #10M19)
[Manual pg. 84] [Manual pg. 112]
Where's the discharge temp sensor located on this unit?
On the XC21, the discharge temperature sensor is located on the compressor discharge line, approximately 6 inches from the compressor body. It's a two-wire thermistor clamped to the copper line with a cable tie.
[Manual pg. 85]
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