Cause | Method of elimination |
The voltmeter needle is in the red zone at the beginning of the scale | |
| Alternator drive belt slippage | Adjust the belt tension |
| Open circuit in the excitation winding power supply circuit | Restore connections |
| *Break in the voltage supply circuit from terminal "30" to plug "15" of the generator | Restore connections, check fuse "10" |
| The generator voltage regulator is damaged | Replace the regulator |
| *Short circuit between the brush holder mounting screw and the brush bus connected to the "B" terminal of the regulator | Repair the short circuit or replace the plastic base of the brush holder |
| Wear or sticking of generator brushes, oxidation of contact rings | Replace the brush holder with brushes, wipe the rings with a napkin soaked in gasoline |
| Open or short circuit to ground in the generator excitation winding | Replace the rotor |
| Short circuit or open circuit in one or more diodes of the rectifier unit | Replace the generator rectifier block |
| Open circuit or interturn short circuit in the stator winding | Replace the stator |
| ** Open or short circuit in additional diodes of the rectifier block | Replace damaged diodes or rectifier block |
The control lamp does not light. The voltmeter needle is in the red zone at the beginning of the scale** | |
| The control lamp has burned out | Replace the lamp |
| Open circuit between terminal "30" and plug "61" of the generator | Restore connections, check fuse "10" |
| There is no contact between terminals "B" and "Sh" of the voltage regulator and the terminals of the brushes (for generators produced before 1996.) | Clean the terminals "B" and "Sh" of the voltage regulator and the terminals of the brushes, bend the terminals of the regulator |
| The wire has become disconnected from the terminal "B" of the brush holder | Connect the wire |
The voltmeter needle is in the red zone at the end of the scale | |
| Damaged voltage regulator (short circuit between pin "W" and ground) | Replace the voltage regulator |
| * Short circuit between the brush holder mounting screw and the brush bus connected to the controller's "W" terminal | Repair the short circuit or replace the plastic base of the brush holder |
Increased generator noise | |
| The generator pulley nut is loose | Tighten the nut |
| The generator bearings are damaged | Replace the bearings |
| Interturn short circuit of the stator winding (generator howl) | Replace the stator |
| The creak of brushes | Wipe the brushes and contact rings with a cotton cloth soaked in gasoline |
* Malfunctions only for the G-222 generator.
** Faults only for generator 37. 3701. Other faults are common for both generators.
[Information copied from the portal VazBook.ru]