TROUBLESHOOTING
W-GV/2, W-GV/3, W-GV/3+, W-GV 8, W-GV 10 and W-GV 15 — June 2017 — EN
23
PROBLEM
CAUSE
SOLUTION
Blocked injector
Have the injector tested and cleaned if necessary
Wrong valve clearance
Adjust valve clearance
Low compression because of dirty valves
Contact WhisperPower service department for
advice
Loss of compression by wear out or
damage
Repair by WhisperPower service
Starter is turning engine smoothly,
but engine runs irregularly after
starting
Faulty glow plug
Replace faulty glow plug. Consider replacing both
or all three taking into account the number of
starts completed.
Engine runs irregularly
Unsuitable or contaminated fuel
Lack of fuel
Fill up with fuel or replace by better quality
Air in the fuel pipes
Bleed air from fuel system (refer to maintenance
section)
Choked fuel filter
Check fuel filter and replace if necessary
Disturbances on the electrical system/
user side
Check if electrical load is fluctuating
Faulty fuel lift pump
Check and repair or replace
Choked air filter
Lack of air
Check the air intake
Choked exhaust system, exhaust blocked
Check the exhaust piping, inspect inside of
manifold
Faulty actuator
Replace faulty parts. Contact WhisperPower
service department for advice.
Blocked injector
Have the injector tested and cleaned if necessary
Wrong valve clearance
Adjust valve clearance
Lack of fuel
Check fuel supply system: fuel pump and filter
Engine speed drops
Genverter overloaded
Reduce the electrical load (switch off some
consumers)
Fuel problem
Check fuel supply and clean fuel filter
Too much oil.
Drain oil to proper level
Lack of intake air.
Check air intake; clean air filter
Choked exhaust system, exhaust blocked.
Check the exhaust piping; inspect inside of
manifold
Faulty actuator
Contact WhisperPower service department for
advice
Defective alternator (windings or other)
Genverter must be sent to manufacturer for repair
of damaged bearing or winding
Damaged engine
Repair by WhisperPower 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 using 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: oil level too high, worn cylinder,
stuck, broken or worn piston rings.
Check the oil level
Check the compression
When the engine RPM is ramping up to
react at a load step some smoke may be
unavoidable.
Wrong setting of minimum RPM.
Sooty
black
smoke
–incomplete
combustion caused by: overload, choked
air filter, air inlet temperature too high,
unsuitable fuel or water in fuel.
Valve clearance incorrect.
No action required.
Readjust minimum rpm setting
Check the fuel.
Check for overload
Check the air filter
Adjust minimal RPM setting
Readjust valve clearance
