TROUBLE SHOOTING
EN / W-SC6/10 for mobile applications / September 2008
29
PROBLEM
CAUSE
SOLUTION
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.
5.2
ENGINE FAULTS
Remove 3 Amp. fuse in the control panel
while working on the generator to prevent the
engine from starting.
5.2.1
General
Most electrical problems relating to Voltage or Frequency
are due to wrong engine speed. Note that RPM and Hz
are basically the same.
Use the problem solving table to find the cause of a wrong
engine speed. When there is no obvious cause one can
adjust the RPM (refer to special procedures).
When the engine is not cranking well, starting problems
almost always originate from battery problems or poor
battery cable connections.
When the engine is cranking, well starting problems
almost always originate from lack of fuel or air bubbles in
the fuel pipes.
A failure code is displayed when a hardware failure at the
generator is detected.
Failure code
Problem
COMMUNICATION
Communication error between the panel end the generator
LOW START BAT
Starter battery voltage too low
ALTERNATOR
No output battery charging voltage
AC-ALTERN. TEMP
AC-alternator temperature is to high (generators for mobile applications only)
WATER TEMP
Coolant temperature is too high
OIL PRESSURE
Oil pressure failure
AC VOLTAGE
Generator AC output voltage is either too high or too low
HIGH CURRENT
Generator is in overload
FREQUENCY
Output frequency of the generator is too low
