Whisper Power W-SQ25 User Manual page 30

TROUBLE SHOOTING
PROBLEM
Engine speed drops
Engine does not stop on
command
Engine exhaust smokes
Engine starts, but stops after 10
up to 30 seconds
Engine stops by itself
30
CAUSE
• Choked fuel filter.
• Disturbances on the electrical system/
user side.
• Faulty fuel lift pump.
• Choked air cleaner element.
• Lack of air.
• Choked exhaust system, exhaust
blocked,.
• Air in the fuel pipes
• Blocked injector.
• Wrong valve clearance.
• Temporarily hunting (this will disappear when engine has run in).
• Too much oil.
• Lack of fuel.
• Lack of intake air.
• Choked exhaust system, exhaust
blocked.
• Generator overloaded
• Defective generator (windings,
bearings or other)
• Damaged engine
• Fuel solenoid is not switching off •
• Loss of control
• Faint blue smoke - generally the result
of light load
• Heavy blue smoke - caused by
lubricating oil: Overfull oil sump or worn
cylinder bore, stuck broken or worn
rings.
• Black smoke –incomplete combustion
caused by: Overload, choked air
cleaner element., inlet temperature too
high, unsuitable fuel or water in fuel.
• Protection system stops the engine;
this can be caused by oil pressure
failure, lack of cooling water. 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).
SOLUTION
Check fuel filter and fuel lift pump: clean or
replace if necessary.
Check if electrical load is fluctuating
Try the pump by manual operation. Repair when
faulty or replace
Check the air intake
Check the exhaust piping; inspect manifold inside
Bleed air from fuel system (refer to maintenance
section).
Have the injector tested and cleaned if necessary.
Adjust valve clearance.
Drain oil to proper level
Check fuel supply system: fuel pump and filter.
Check air intake.
Check the exhaust piping; inspect manifold inside
Reduce the electrical load (switch off some
consumers).
Generator must be sent to manufacturer for repair
of damaged bearing or winding.
Repair by Whisper Power service
Faulty Digital Diesel Control unit. Stop the engine
manually by the stop handle.
Check wire connections to stop solenoid. Check
solenoid valve function. Replace if necessary
Increase load.
Check the oil level.
Check the compression.
Check the fuel .
Check for overload.
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.
January 2009 / W-SQ25 for mobile applications / EN