TROUBLE SHOOTING
32 Copyright © 2008 Mastervolt / December 2008 / Whisper 12 Ultra - Three phase for mobile applications/ EN
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
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