24
April 2004 / WHISPER 20 ULTRA / USA
TROUBLE SHOOTING
PROBLEM
CAUSE
SOLUTION
Generator voltage fluctuates.
• Disturbances on the electrical system/
Check if electrical load is fluctuating.
user side.
• Engine runs irregular.
When engine runs irregular refer to section:
"Engine runs irregular" in engine faults.
Generator is not able to start
If the generator is unable to supply enough Check the electric motor’s current draw required
an electric motor.
power to start an electric motor,
for starting. This should not exceed 70% of the
this is usually because this motor draws
rated generator peak output current. This could be
too much current during starting.
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.
5.2.2 Trouble shooting check list engine
PROBLEM
CAUSE
SOLUTION
Diesel engine fails to crank,
Almost certainly this is an electrical problem
Check on water in the cylinders and further
the starter makes clicking
or the engine is blocked by water in the
damage by cranking. When there is water in the
noises, or the engine cranks
cylinder or there is other severe damage.
cylinder, then deactivate the control system,
very slowly.
deconnect the battery, remove the glow plugs.
Crank the engine to remove the water through the
opening of the glow plugs. Check oil on the pre-
sence of water and change oil. Find out how the
water did enter the cylinders (check the air vent).
Take precautions to prevent it from happening
again. When there is no mechanical malfunction
the problem must be an electric malfunction.
5.2 ENGINE
FAULTS
Remove 3 Amp. fuse in the control panel
while working on the generator to prevent
the engine to start.
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.
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 cylinders 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.
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
EXHAUST TEMP
Exhaust temperature is too high
WATER TEMP
Coolant temperature is too high
OIL PRESSURE
Oil pressure failure
LOW VOLTAGE
Generator AC output voltage is too low
HIGH CURRENT
generator is in overload
FREQUENCY
output frequency of the generator is too
low
