TROUBLE SHOOTING
US / WHISPER 15 ULTRA - Three Phase / December 2008 / Copyright © 2008 Mastervolt
31
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.
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.
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
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
5.2.2
Trouble shooting table
PROBLEM CAUSE
SOLUTION
•
Almost certainly this is an electrical
problem. Display will indicate “LOW
START BAT”
•
One other possibility is that the engine
is locked by water in the cylinder or
there is other severe damage.
Check on water in the cylinder and further
damage by cranking. When there is water in the
cylinder, then deactivate the control system,
disconnect the battery, remove the glow plugs.
Crank the engine to remove the water through the
opening of the glow plugs. Check oil on the
presence of water and change oil. Find out how
the water did enter the cylinder (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.
•
Starter battery switched "OFF".
Check position of the battery switch and switch
"ON".
•
Starter battery voltage insufficient
(battery too weak).
Check battery voltage. Recharge the battery.
Inspect battery terminals and cables for a good
electrical connection (inspect against corrosion,
tattered wires, etc.)
•
Faulty fuse on the 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.
Diesel engine fails to crank, the
starter makes clicking noises, or
the engine cranks very slowly
•
Starter broken
Repair the starter motor