Whisper Power W-SC3 User Manual page 24

TROUBLE SHOOTING
PROBLEM
Engine starts, but stops after 10
up to 30 seconds
Engine stops by itself
Sooty, black exhaust.
Loss of power
Over-temperature
Engine stops very slowly
24
CAUSE
• 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.
• Overload or short circuit.
• Lack of fuel.
• Oil pressure low. (oil pressure switch
tripped).
• 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.
• Loss of compression by wear out or
damage.
• Overload or short circuit.
• Generator is being overloaded. Digital
Diesel Control will indicate "overload".
• Insufficient intake air.
• Choked air filter.
• Fuel injector faulty.
• Valve clearance incorrect.
• Poor fuel quality.
• Poor quality lubricating oil.
• Continuous running with very low load.
● 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.
• Choked fuel filter.
• Choked air filter.
• Faulty fuel pump
• Exhaust blocked.
• Injector blocked.
• Loss of compression, sticking.
• damaged piston ring.
• Wear out of cylinder.
• Overload.
• Low oil level.
• Water inlet system blocked.
• Broken impeller.
• Radiator choked
• Hot air circulating into radiator.
• Engine should stop within 20 seconds
after pushing STOP button
SOLUTION
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.
Switch off the consumers and test for short
circuit.
Check fuel supply system: fuel lines, pump,
filter, valves, tank level, etc.
Check oil level.
Check engine's oil pressure and have it
repaired by Whisper Power.
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.
Repair by Whisper Power service.
Switch off the consumers and test for short
circuit.
Check electrical load and switch off some
consumers
Check intake air paths and filter, clean and
replace if necessary.
Replace injector.
Readjust valve clearance
Use better quality diesel.
Use better quality oil.
Increase load and have the engine run for a
few hours
Bring the oil to the correct level
Replace the fuel filter.
Check air inlet openings; clean air filter.
Replace
Check the exhaust system.
Have the injector checked.
Have the compression measured.
Clean or replace the rings.
Have the compression measured and have the
engine overhauled.
Take away the overload.
Fill up with oil.
Check the cooling system thoroughly.
Clean radiator
Check and refer to installation manual
Stop solenoid is faulty an engine is stopped by
shut off valve
January 2011 / W-SC3 Mobile / EN