TROUBLE SHOOTING
EN / W-SQ12 for mobile applications / January 2009
27
5.1.2
Trouble shooting table alternator
PROBLEM
CAUSE
SOLUTION
No output (Voltage) at all
•
Circuit breaker "off" or faulty fuse
Check switches and fuses and measure
directly on the alternator to exclude external
causes.
•
Low engine RPM.
Check the engine RPM and adjust (refer to
special procedures).
•
Loss of residual magnetism.
Check the residual magnetism and flash the
alternator (refer to special procedures).
•
Capacitor loose or broken.
Check by independent excitation if the problem
is in the capacitor or in the windings.
•
Rotor diodes broken.
Check the diode in the rotor (refer to special
procedures). The
W-SQ12
has one diode in
the rotor.
Generator output voltage too
low when no load is on it (less
than 210V/105V)).
•
No load at all or very low load.
Switch on a load and check voltage.
•
Engine is not reaching the rated RPM.
Refer to special procedures to readjust RPM.
•
Defective capacitor.
Check capacitor and replace if necessary
(refer to special procedures).
•
Defective diode
Check the diode in the rotor and replace (refer
to special procedures).
Generator output voltage too
low under load (less than
210V/105V).
In no load condition it is ok
•
Generator is overloaded.
Switch off a load; (part off) consumers.
•
Engine is not reaching the rated RPM.
Refer to engine RPM problems
•
Defective capacitor
Check capacitor and replace if necessary
(refer to special procedures).
Generator voltage too high,
(more than 245V/130V)
•
Engine is running too fast (RPM too
high).
Check engine speed and adjust (refer to
special procedures).
•
Over-energising
due
to
defective
capacitors
Check capacitor specification and replace
capacitors if necessary.
•
Presence of a strong capacitive load
(leading power factor)
Compensate for this capacity and seek for
experts advice (
Whisper Power
customers
service)
Generator voltage fluctuates.
•
Disturbances on the electrical system/
user side.
Check if electrical load is fluctuating
•
Engine runs irregularly.
When engine runs irregularly refer to section:
"Engine runs irregularly".
Generator is not able to start an
electric motor
If the generator is unable to supply
enough power to start an AC electric
motor, this is usually because this motor
draws too much current during starting
Check the electric motor’s current draw
required for starting. This should not exceed
the rated generator peak output current. This
could be remedied by providing stronger
capacitors to the motor or using a "soft-start".
Inquire at your nearest
Whisper Power
dealer
or directly at the manufacturer,
Whisper Power
in the Netherlands.
