1448

Possible Causes

• •Damaged voltage regulator
• •Faulty rotating rectifier assembly (diodes CR1 through CR6)
• •Improper connections at generator output terminals
• •Incorrect voltage sense or setup wiring connection
• •Overload

Suggested Actions

1. 1Bring the generator to idle
2. 2Check connections
3. 3Check each diode
4. 4Check for current spikes
5. 5Check for motor starts
6. 6Check for overload
7. 7Check inrush current
8. 8Check operation by disconnecting the load and restarting the unit
9. 9Check that load is within proper operating range
10. 10Compare connections in generator to wiring schematic
11. 11Connect InPower
12. 12Correct according to the appropriate schematic as needed
13. 13Correct any overload
14. 14Disconnect the generator control harness from the voltage regulator
15. 15Inspect the voltage regulator and the generator control harness connector pins
16. 16Turn off the generator
17. 17Using InPower, verify that the AC voltage output is greater than residual
18. 18Verify that excitation inputs J18–1 and J18–2 are connected to the correct generator PMG terminals
19. 19Verify that the voltage sensing inputs J22-1, J22-2, J22-3, and J22-4 are connected to L1, L2, L3, and L4 respectively
20. 20Visually inspect for corroded pins, bent or broken pins, pushed back or expanded pins

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