TROUBLE SHOOTING
24
January 2011 / W-SC3 Mobile / EN
PROBLEM CAUSE
SOLUTION
Engine starts, but stops after 10
up to 30 seconds
•
Protection system stops the engine;
this can be caused by oil pressure
failure. Overload, loose wire or faulty
alarm switch. Digital Diesel Control will
help to indicate failure.
Refer to paragraph 2.5.5. and 3.2.2 for
information on the alarm system. Bypassing
the switches can help to confirm the failure.
Engine stops by itself
•
Overload or short circuit.
Switch off the consumers and test for short
circuit.
•
Lack of fuel.
Check fuel supply system: fuel lines, pump,
filter, valves, tank level, etc.
•
Oil pressure low. (oil pressure switch
tripped).
Check oil level.
Check engine’s oil pressure and have it
repaired by Whisper Power.
•
Excessive heat in cooling system
(thermo-switch tripped).
•
Lack of cooling water (exhaust switch
tripped).
•
Impeller broken.
•
Cooling water blocked.
•
Water strainer blocked.
•
Air or water in the fuel.
•
Blocked air or fuel filter.
Check cooling liquid level expansion tank:
water pump, impeller: coolant flow.
Check if radiator fan works properly. Air in
system can block circulation. Almost all
problems of over heating are caused by faulty
installation: bents in the routing of cooling
pipes that captures air bubbles (air locks) or
hot air circulating back into the radiator. Refer
to installation manual.
•
Loss of compression by wear out or
damage.
Repair by Whisper Power service.
•
Overload or short circuit.
Switch off the consumers and test for short
circuit.
Sooty, black exhaust.
•
Generator is being overloaded. Digital
Diesel Control will indicate “overload”.
Check electrical load and switch off some
consumers
•
Insufficient intake air.
•
Choked air filter.
Check intake air paths and filter, clean and
replace if necessary.
•
Fuel injector faulty.
Replace injector.
•
Valve clearance incorrect.
Readjust valve clearance
•
Poor fuel quality.
Use better quality diesel.
•
Poor quality lubricating oil.
Use better quality oil.
•
Continuous running with very low load.
Increase load and have the engine run for a
few hours
Loss of power
●
Wrong measurement. Check if the load is measured correctly. Does the Amp meter show
the correct value? When calculating the load by multiplying voltage and amps this should
be done by using the exact values, taking into account the power factor of the consumers.
When any doubt, measure the power directly with an appropriate instrument.
•
Overfull oil sump.
Bring the oil to the correct level
•
Choked fuel filter.
Replace the fuel filter.
•
Choked air filter.
Check air inlet openings; clean air filter.
•
Faulty fuel pump
Replace
•
Exhaust blocked.
Check the exhaust system.
•
Injector blocked.
Have the injector checked.
•
Loss of compression, sticking.
Have the compression measured.
•
damaged piston ring.
Clean or replace the rings.
•
Wear out of cylinder.
Have the compression measured and have the
engine overhauled.
Over-temperature
•
Overload.
Take away the overload.
•
Low oil level.
Fill up with oil.
•
Water inlet system blocked.
Check the cooling system thoroughly.
•
Broken impeller.
•
Radiator choked
Clean radiator
•
Hot air circulating into radiator.
Check and refer to installation manual
Engine stops very slowly
•
Engine should stop within 20 seconds
after pushing STOP button
Stop solenoid is faulty an engine is stopped by
shut off valve
