37

Possible Causes

• •Broken or loose wiring connections
• •Mechanical engine damage
• •Grounded or shorted quad windings
• •Overload Condition
• •Fuel supply issue
• •Output voltage issue
• •Incorrect loads
• •Quad leads not fully seated in connector to control
• •Control plugs not fully seated
• •Governor actuator operation issue
• •Grounded or shorted field windings
• •Rotating diode assembly failure
• •Main rotor failure
• •Exciter rotor failure
• •Configuration plug P8 not fully seated
• •Incorrect control part number
• •Broken wiring connections
• •Loose wiring connections
• •Fuel supply issues
• •Incorrect output voltage

Suggested Actions

1. 1Check for broken or loose wiring connections
2. 2Check fuel supply
3. 3Check mechanical engine damage
4. 4Check output voltage
5. 5Check loads
6. 6Verify quad leads are fully seated in connector to control
7. 7Verify control plugs are fully seated
8. 8Check governor actuator operation
9. 9Check field windings
10. 10Check for proper field resistance reading, open to ground
11. 11Check brush condition and contact
12. 12Check for grounded or shorted quad windings
13. 13Check for mechanical engine damage
14. 14Ensure quad leads are fully seated in connector to control
15. 15Ensure control plugs are fully seated
16. 16Check for grounded or shorted field windings
17. 17Check rotating diode assembly
18. 18Check main rotor
19. 19Check exciter rotor
20. 20Verify configuration plug P8 is fully seated

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