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The first sentance of the warning is the clue. It says the standard ratings calculation is not at the AHRI test condition due to curve out of bound. The standard ratings calculation looks at each of the performance curve objects min/max limit (Minimum/Maximum Value of x or y). If these limits exceed the values required for the calculations, this warning is printed. So this warning directly relates to the performance curves. Look at each curves limits and compare to the values shown below.

IndoorCoilInletAirWetBulbTempRated(19.44);   // 19.44C (67F)  Tests A2, B2, B1, and F1
OutdoorCoilInletAirDryBulbTempRated(35.0);   // 35.00C (95F)  Tests A2, B2, B1, and F1
OutdoorCoilInletAirDryBulbTempTestA2(35.0);  // 35.00C (95F)  Test A2 (high speed)
OutdoorCoilInletAirDryBulbTempTestB2(27.78); // 27.78C (82F)  Test B2 (high speed)
OutdoorCoilInletAirDryBulbTempTestB1(27.78); // 27.78C (82F)  Test B1 (Low speed)
OutdoorCoilInletAirDryBulbTempTestF1(19.44); // 19.44C (67F)  Test B1 (Low speed)

Curve:Biquadratic,
  DXCoolCapFT,            !- Name
  0.942587793,             !- Coefficient1 Constant
  0.009543347,             !- Coefficient2 x
  0.000683770,             !- Coefficient3 x**2
  -0.011042676,            !- Coefficient4 y
  0.000005249,             !- Coefficient5 y**2
  -0.000009720,            !- Coefficient6 x*y
  12.77778,                !- Minimum Value of x  <---
  23.88889,                !- Maximum Value of x  <---
  18.0,                    !- Minimum Value of y  <---
  46.11111,                !- Maximum Value of y  <---
  ,                        !- Minimum Curve Output
  ,                        !- Maximum Curve Output
  Temperature,             !- Input Unit Type for X
  Temperature,             !- Input Unit Type for Y
  Dimensionless;           !- Output Unit Type

The first sentance of the warning is the clue. It says the standard ratings calculation is not at the AHRI test condition due to curve out of bound. The standard ratings calculation looks at each of the performance curve objects min/max limit (Minimum/Maximum Value of x or y). If these limits exceed the values required for the calculations, this warning is printed. So this warning directly relates to the performance curves. Look at each curves limits and compare to the values shown below.below.

The Minimum Value of y in your performance curve is 23.88889 C while the F1 test requires 19.44 C. I assume this is the trigger for the warning.

IndoorCoilInletAirWetBulbTempRated(19.44);   // 19.44C (67F)  Tests A2, B2, B1, and F1
OutdoorCoilInletAirDryBulbTempRated(35.0);   // 35.00C (95F)  Tests A2, B2, B1, and F1
OutdoorCoilInletAirDryBulbTempTestA2(35.0);  // 35.00C (95F)  Test A2 (high speed)
OutdoorCoilInletAirDryBulbTempTestB2(27.78); // 27.78C (82F)  Test B2 (high speed)
OutdoorCoilInletAirDryBulbTempTestB1(27.78); // 27.78C (82F)  Test B1 (Low speed)
OutdoorCoilInletAirDryBulbTempTestF1(19.44); // 19.44C (67F)  Test B1 (Low speed)

Curve:Biquadratic,
  DXCoolCapFT,            !- Name
  0.942587793,             !- Coefficient1 Constant
  0.009543347,             !- Coefficient2 x
  0.000683770,             !- Coefficient3 x**2
  -0.011042676,            !- Coefficient4 y
  0.000005249,             !- Coefficient5 y**2
  -0.000009720,            !- Coefficient6 x*y
  12.77778,                !- Minimum Value of x  <---
  23.88889,                !- Maximum Value of x  <---
  18.0,                    !- Minimum Value of y  <---
  46.11111,                !- Maximum Value of y  <---
  ,                        !- Minimum Curve Output
  ,                        !- Maximum Curve Output
  Temperature,             !- Input Unit Type for X
  Temperature,             !- Input Unit Type for Y
  Dimensionless;           !- Output Unit Type

The first sentance of the warning is the clue. It says the standard ratings calculation is not at the AHRI test condition due to curve out of bound. The standard ratings calculation looks at each of the performance curve objects min/max limit (Minimum/Maximum Value of x or y). If these limits exceed the values required for the calculations, this warning is printed. So this warning directly relates to the performance curves. Look at each curves limits and compare to the values shown below.

The Minimum Value of y in your performance curve is 23.88889 C while the F1 test requires 19.44 C. I assume this is the trigger for the warning.

IndoorCoilInletAirWetBulbTempRated(19.44);   // 19.44C (67F)  Tests A2, B2, B1, and F1
OutdoorCoilInletAirDryBulbTempRated(35.0);   // 35.00C (95F)  Tests A2, B2, B1, and F1
OutdoorCoilInletAirDryBulbTempTestA2(35.0);  // 35.00C (95F)  Test A2 (high speed)
OutdoorCoilInletAirDryBulbTempTestB2(27.78); // 27.78C (82F)  Test B2 (high speed)
OutdoorCoilInletAirDryBulbTempTestB1(27.78); // 27.78C (82F)  Test B1 (Low speed)
OutdoorCoilInletAirDryBulbTempTestF1(19.44); // 19.44C (67F)  Test B1 F1 (Low speed)

Curve:Biquadratic,
  DXCoolCapFT,            !- Name
  0.942587793,             !- Coefficient1 Constant
  0.009543347,             !- Coefficient2 x
  0.000683770,             !- Coefficient3 x**2
  -0.011042676,            !- Coefficient4 y
  0.000005249,             !- Coefficient5 y**2
  -0.000009720,            !- Coefficient6 x*y
  12.77778,                !- Minimum Value of x  <---
  23.88889,                !- Maximum Value of x  <---
  18.0,                    !- Minimum Value of y  <---
  46.11111,                !- Maximum Value of y  <---
  ,                        !- Minimum Curve Output
  ,                        !- Maximum Curve Output
  Temperature,             !- Input Unit Type for X
  Temperature,             !- Input Unit Type for Y
  Dimensionless;           !- Output Unit Type

The first sentance of the warning is the clue. It says the standard ratings calculation is not at the AHRI test condition due to curve out of bound. The standard ratings calculation looks at each of the performance curve objects min/max limit (Minimum/Maximum Value of x or y). If these limits exceed the values required for the calculations, this warning is printed. So this warning directly relates to the performance curves. Look at each curves limits and compare to the values shown below.

The Minimum Value of Comparing your limits for x and y in your performance curve minimum and maximum, e.g., 12.78 and 23.89 for indoor wet-bulb and 18 and 46.1 for outdoor temperature, I don't see anything that is 23.88889 C while the F1 ouside the range of these StandardRatings test requires 19.44 C. I assume this is the trigger for the warning.limits.

IndoorCoilInletAirWetBulbTempRated(19.44);   // 19.44C (67F)  Tests A2, B2, B1, and F1
OutdoorCoilInletAirDryBulbTempRated(35.0);   // 35.00C (95F)  Tests A2, B2, B1, and F1
OutdoorCoilInletAirDryBulbTempTestA2(35.0);  // 35.00C (95F)  Test A2 (high speed)
OutdoorCoilInletAirDryBulbTempTestB2(27.78); // 27.78C (82F)  Test B2 (high speed)
OutdoorCoilInletAirDryBulbTempTestB1(27.78); // 27.78C (82F)  Test B1 (Low speed)
OutdoorCoilInletAirDryBulbTempTestF1(19.44); // 19.44C (67F)  Test F1 (Low speed)

Curve:Biquadratic,
  DXCoolCapFT,            !- Name
  0.942587793,             !- Coefficient1 Constant
  0.009543347,             !- Coefficient2 x
  0.000683770,             !- Coefficient3 x**2
  -0.011042676,            !- Coefficient4 y
  0.000005249,             !- Coefficient5 y**2
  -0.000009720,            !- Coefficient6 x*y
  12.77778,                !- Minimum Value of x  <---
  23.88889,                !- Maximum Value of x  <---
  18.0,                    !- Minimum Value of y  <---
  46.11111,                !- Maximum Value of y  <---
  ,                        !- Minimum Curve Output
  ,                        !- Maximum Curve Output
  Temperature,             !- Input Unit Type for X
  Temperature,             !- Input Unit Type for Y
  Dimensionless;           !- Output Unit Type