Whisper Power M-SQ27 User Manual page 33

PROBLEM
Engine starts, but stops after 10
seconds
Engine stops by itself
(Digital Diesel Control will help
to indicate failures)
Sooty, black exhaust.
Loss of power
Over-temperature
EN / M-SQ 27 / August 2020
CAUSE
• Protection system stops the engine;
this can be caused by oil pressure
failure, lack of cooling water (exhaust
temperature alarm). 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.
• V-belt broken or loose.
• Thermostat faulty
• Generator is being overloaded. Digital
Diesel Control will indicate "overload".
• Insufficient intake air.
• Choked air cleaner.
• 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 cleaner
• Exhaust blocked.
• Injector blocked.
• Loss of compression, sticking or
damaged piston ring.
• Wear out of cylinder.
• Overload.
• Low level of cooling oil or air in the
cooling system
• Water inlet system blocked.
• Broken impeller.
• Water strainer choked
• Heat exchanger choked.
SOLUTION
See paragraph 2.5.5. and 3.2.2 for information
on the alarm system. Bypassing the switches
can help to confirm the failure. When there is
no real failure, it could be a faulty alarm switch
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 WhisperPower.
Check cooling water system flow: water
pump, inlet water filter, coolant flow.
Repair by WhisperPower service.
Readjust or replace V-belt
Check thermostat and replace
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 cleaner.
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 liquid and release air bubbles.
Check if there are air blocks in the system;
see the installation manual
Check the cooling system thoroughly.
TROUBLESHOOTING
33