TROUBLE SHOOTING
EN / W-SQ25 for mobile applications / January 2009
31
PROBLEM
CAUSE
SOLUTION
•
Excessive heat in cooling system
(thermo-switch tripped).
•
Lack of cooling water (exhaust switch
tripped).
•
Impeller broken.
•
Cooling water blocked.
Check cooling liquid level in expansion tank;
check coolant flow, coolant pump,.
Check if radiator fans work properly and switch to
higher speed. Air piping system might block
circulation. Almost all problems of overheating are
caused by faulty installation: bents in the routing
of cooling pipes that capture air bubbles (air
locks) or hot air circulating bacj into the radiators.
Refer to installation manual.
•
Air or water in the fuel.
•
Blocked air or fuel filter.
Check and clean
•
Loss of compression by wear out or
damage.
Repair by
Whisper Power
service.
•
V-belt broken or loose.
Readjust or replace V-belt
•
Thermostat faulty
Check thermostat and replace
Sooty, black exhaust.
•
Generator is being overloaded. Digital
Diesel Control will indicate “HIGH
CURRENT”.
Check electrical load and switch off some
consumers
•
Insufficient intake air.
•
Choked air cleaner element.
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 up to 70% of nominal power 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 cleaner element.
Check air inlet openings; clean air cleaner
element..
•
Exhaust blocked.
Check the exhaust system.
•
Faulty fuel pump
Check and replace if nescessary
•
Injector blocked.
Have the injector checked.
•
Loss of compression, sticking or
damaged piston ring.
Have the compression measured.
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 level of coolant or air in the
cooling system
Fill up with coolant and release air bubbles.
Check if there are air blocks in the system; refer
to the installation manual
•
Radiator choked by dirt
•
Hot air circulation in radiator.
Check the cooling system thoroughly.
Clean radiator
•
Broken or slipping V-belt.
Replace and adjust the V-belt tension.
•
Faulty thermostat
Check the thermostat or replace.
5.2.3
Warnings
Generator must be shut off immediately if:
●
Motor RPM suddenly rises or drops.
●
Unusual noise comes from generating set.
●
Exhaust gases suddenly colour dark.
●
Engine failure warning light is on
