TROUBLE SHOOTING
26 November 2004 / WHISPER 6 / 12 Mobile / EN
PROBLEM CAUSE SOLUTION
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 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. Alternator 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
5.2.2 Trouble shooting check list engine
PROBLEM CAUSE SOLUTION
Diesel engine fails to crank, • Almost certainly this is an electrical problem The problem must be an electric malfunction.
the starter makes clicking in the connection between battery
noises, or the engine cranks and starter.
Display will indicate “Low Start Bat”
• Starter battery switched "OF". Check position of the battery switch and switch
"ON".
• Starter battery voltage insufficient Check battery voltage. Recharge the battery.
(battery too weak). Inspect battery terminals and cables for a good
electrical connection (inspect against corrosion,
tattered wires, etc.)
• Faulty fuse on control panel. Replace fuse
• Wiring control system faulty. During the normal starting process, the battery
voltage drops to 11V (with a fully charged
battery). If the voltage does not drop during
starting, the electrical connection is faulty. If the
battery voltage drops lower than 11V, then the
battery has been discharged too deep.
• Starter broken. Repair the starter motor.
• To thick engine lubricating oil. Change oil for a lower viscosity.
Starter is cranking engine • Out of fuel or faulty fuel, water in the fuel. Fill up with fuel or replace by better quality.
smoothly, but engine fails • Fuel solenoid is not opening. Check wire connections and circuitry to solenoid.
to start. (Refer to DC wiring diagram).
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