Engine Faults; General - Mastervolt WHISPER 6 ULTRA User Manual

PROBLEM
low under load (less than
210V/105V).
In no load condition it is ok
Generator voltage too high,
(more than 245V/130V)
Generator voltage fluctuates.
Generator is not able to start an
electric motor
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.
Failure code Problem
Communication error between the panel end the generator
COMMUNICATION
Starter battery voltage too low
LOW START BAT
No output battery charging voltage
ALTERNATOR
Exhaust temperature is too high
EXHAUST TEMP
Coolant temperature is too high
WATER TEMP
Oil pressure failure
OIL PRESSURE
Generator AC output voltage is either too high or too low
AC VOLTAGE
Generator is in overload
HIGH CURRENT
Output frequency of the generator is too low
FREQUENCY
EN / WHISPER 6 ULTRA / December 2009 / Copyright © 2009 Mastervolt
CAUSE
• Engine is not reaching the rated RPM.
• Defective capacitor
• Engine is running too fast (RPM too
high).
• Over-energising
due
capacitors
• Presence of a strong capacitive load
(leading power factor)
• Disturbances on the electrical system/
user side.
• Engine runs irregularly.
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
SOLUTION
Refer to engine RPM problems
Check capacitor and replace if necessary
(refer to special procedures).
Check engine speed and adjust (refer to
special procedures).
Check capacitor specification and replace
to defective
capacitors if necessary.
Compensate for this capacity and seek for
experts advice (MASTERVOLT customers
service)
Check if electrical load is fluctuating
When engine runs irregularly refer to section:
"Engine runs irregularly".
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.
When the engine is cranking, well starting problems
almost always originate from lack of fuel or air bubbles in
the fuel pipes.
When the engine does not start instantly,
prolonged cranking can fill up the exhaust
system with cooling water because of the
water injected exhaust. When the water
enters the cylinder through the valves this will
bring severe damage to the engine. When the
engine does not start and repeated cranking
is necessary shut off the seawater inlet. Open
the valve immediately after the engine has
started.
A failure code is displayed when a hardware failure at the
generator is detected.
TROUBLE SHOOTING
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