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Title: Without no-load voltage when generator set started alternator
Author: tongli motor  Time: 2012/7/28
Connect Terminal “E+” and “E-” to a 4-12V new battery, and maintain it for 2-3 seconds. (Pay attention to polarities).
When the battery is removed, voltage reaches the rated level. Magnet field loss.
When the battery is removed, voltage is established but doesn’t reach rated level.
1. Check AVR reference signal connection
2. Diode fault
3. Exciting armature short circuit
When the battery is removed, no voltage is established. 
1. AVR fault
2. exciter field winding wiring open circuit (check the winding)
3. main rotor winding wiring open circuit (check the resistance)
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