Mastervolt WHISPER 6 ULTRA

TROUBLE SHOOTING
EN / Whisper 6 Ultra for mobile applications / December 2009 / Copyright © 2009 Mastervolt 29
PROBLEM CAUSE SOLUTION
x Generator is overloaded.
Switch off a load; (part off) consumers.
x Engine is not reaching the rated RPM.
Refer to engine RPM problems
Generator output voltage too
low under load (less than
210V/105V).
In no load condition it is ok
x Defective capacitor
Check capacitor and replace if necessary
(refer to special procedures).
x Engine is running too fast (RPM too
high).
Check engine speed and adjust (refer to
special procedures).
x Over-energising due to defective
capacitors
Check capacitor specification and replace
capacitors if necessary.
Generator voltage too high,
(more than 245V/130V)
x Presence of a strong capacitive load
(leading power factor)
Compensate for this capacity and seek for
experts advice (MASTERVOLT customers
service)
x Disturbances on the electrical system/
user side.
Check if electrical load is fluctuating Generator voltage fluctuates.
x 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 Mastervolt dealer or
directly at the manufacturer, Mastervolt 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