Cummins

2816

UnclassifiedGeneral

What This Code Means

PT voltage output does not match control calibrated PT ratio

Possible Causes

  • •Faulty PT connections
  • •Faulty PT module
  • •Faulty PTs
  • •Incorrect CT Ratio, CTs, or CT Connections
  • •Incorrect PT Ratio, PTs, or PT Connections
  • •Incorrect PT connections
  • •Incorrect PT ratio
  • •Incorrect PT ratio setup in control
  • •Incorrectly connected wires
  • •Open circuit
  • •Open circuit in PT wiring
  • •Short In the Load or Load Cables
  • •The control is set up with the incorrect CT ratio or feature code
  • •The genset PT ratio (primary vs. secondary) is too small for the generator set rating

Suggested Actions

  1. 1Access the PT Ratio configuration menu on the operator panel (Setup > OEM Setup > OEM ALT Setup > PT Primary or PT Sec) and set the PT ratio appropriately
  2. 2Check connections from alternator to PT, and from PT to base board (Three phase: L1 = J22-1, L2 = J22-2, L3 = J22-3, LN = J22-4; Single phase: L1, L2, LN)
  3. 3Check the CT Ratio, CTs, and CT connections, reference event/fault code 2814.
  4. 4Check the PT Ratio, PTs, and PT connections, reference event/fault code 2816.
  5. 5Check the connections from the alternator to the PT, and from the PT to the base board (Three phase inputs: L1 = J22-1, L2 = J22-2, L3 = J22-3, LN = J22-4; single phase: L1, L2, LN)
  6. 6Check the load and load cables. Repair if necessary.
  7. 7Correct the wiring issue if wires are incorrectly connected or there is an open circuit
  8. 8Correct wiring issues or open circuits
  9. 9Ensure control is set up with the correct PT ratio (primary vs. secondary)
  10. 10Ensure that the control is set up with the correct PT ratio (primary vs. secondary)
  11. 11Ensure the control is set up with the correct PT ratio (primary vs. secondary)
  12. 12Measure voltage going into the PT from the alternator and voltage output of the PT to the base board (Three phase: L1 = J22-1, L2 = J22-2, L3 = J22-3, LN = J22-4; Single phase: L1, L2, LN)
  13. 13Reference event/fault code 2816 for troubleshooting information on the PT ratio
  14. 14Replace the PT module if control calibrated PT ratio matches input voltage but does not match output voltage
  15. 15Use the CT ratio calculator in InPower to determine the correct CT ratio for this generator set and enter the correct CT ratio via InPower or through the operator panel

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