11
Electric Power Generation
2019.10 / e
Installation and maintenance
R180
AVR
5599 en -
6 - TROUBLESHOOTING CHART
Symptom
Cause
Action
No voltage
build-up
Fuse links blown
Change the fuse links.
Low residual voltage across
X1 and X2 terminals
Run alternator at correct rpm. If the problem
persists, disconnect the AVR and connect a
24 VDC battery between F1 and F2. This action
will increase the residual voltage.
Reconnect AVR.
Incorrect wiring
Check the wiring complies with the wiring diagram
and repair if necessary.
Voltmeter defective
Replace the voltmeter
Faulty AVR
Replace the AVR
Voltage too high
Incorrect voltage setting
Set the voltage to the required value
Faulty AVR
Replace the AVR
Low voltage
External potentiometer link
open
Connect link or potentiometer as necessary
Loss of sensing voltage
Connect as per the diagram
Prime mover rpm falls
Set rpm
Incorrect
regulation
Prime mover rpm falls
Set rpm
Highly distorted non-linear
load
Reduce non-linear load
Alternator running on very low
P.F.
P.F. correction required
Unbalanced load
Redistribute the load equally over all three phases.
Faulty AVR
Replace the AVR
Rotating diodes failed
Replace the diodes
Droop connected
Remove droop connection if not needed
Voltage unstable
Incorrect wiring
Check and repair the wiring. Make sure that the
contacts are screwed in tightly
Stability setting incorrect
Adjust the stability potentiometer
Voltage builds-up
but collapses/
erratic behaviour
Incorrect wiring
Check and repair the wiring. Make sure that the
contacts are screwed in tightly
Incorrect circuit board settings Set as per instructions in the manual
