Whisper Power W-SQ-Pro User Manual page 36

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
36
CAUSE
• Ongoing hunting caused by faulty
electronic governor
• Faulty electronic governor
• Too much oil.
• Lack of fuel.
• Lack of intake air.
• Choked exhaust system, exhaust
blocked.
• Generator overloaded
• Generator over energised.
• 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 filter,
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).
• Excessive heat in cooling system
(thermo-switch tripped).
• Lack of cooling water (exhaust switch
tripped).
• Impeller broken.
• Cooling water 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
SOLUTION
Replace faulty parts.
Replace faulty parts.
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).
Check that the proper capacitor type is installed
and that it is connected correctly.
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.
Check the air intake.
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.
Check cooling liquid level in expansion tanks;
check water system flow: water pump, coolant
flow.
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 back into the radiators.
Refer to installation manual.
Check and clean.
Repair by Whisper Power service.
Readjust or replace V-belt
Check thermostat and replace
February 2020 / W-SQ-Pro 15/10.8 / W-SQ-Pro 18/15,5