TROUBLE SHOOTING
30
April 2010 / W-SQ20 for mobile applications / EN
PROBLEM CAUSE
SOLUTION
•
Choked fuel filter.
Check fuel filter and fuel lift pump: clean or
replace if necessary.
•
Disturbances on the electrical system/
user side.
Check if electrical load is fluctuating
•
Faulty fuel lift pump.
Try the pump by manual operation. Repair when
faulty or replace
•
Choked air cleaner element.
•
Lack of air.
Check the air intake
•
Choked exhaust system, exhaust
blocked,.
Check the exhaust piping; inspect manifold inside
•
Air in the fuel pipes
Bleed air from fuel system (refer to maintenance
section).
•
Blocked injector.
Have the injector tested and cleaned if necessary.
•
Wrong valve clearance.
Adjust valve clearance.
•
Temporarily hunting (this will disappear when engine has run in).
Engine speed drops
•
Too much oil.
Drain oil to proper level
•
Lack of fuel.
Check fuel supply system: fuel pump and filter.
•
Lack of intake air.
Check air intake.
•
Choked exhaust system, exhaust
blocked.
Check the exhaust piping; inspect manifold inside
•
Generator overloaded
Reduce the electrical load (switch off some
consumers).
•
Defective generator (windings,
bearings or other)
Generator must be sent to manufacturer for repair
of damaged bearing or winding.
•
Damaged engine
Repair by Whisper Power service
Engine does not stop on
command
•
Fuel solenoid is not switching off •
•
Loss of control
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
Engine exhaust smokes
•
Faint blue smoke - generally the result
of light load
Increase load.
•
Heavy blue smoke - caused by
lubricating oil: Overfull oil sump or worn
cylinder bore, stuck broken or worn
rings.
Check the oil level.
Check the compression.
•
Black smoke –incomplete combustion
caused by: Overload, choked air
cleaner element., inlet temperature too
high, unsuitable fuel or water in fuel.
Check the fuel .
Check for overload.
Engine starts, but stops after 10
up to 30 seconds
•
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.
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.
