TROUBLE SHOOTING
EN / W-SQ12 for mobile applications / January 2009
29
5.2.2
Trouble shooting table engine
PROBLEM
CAUSE
SOLUTION
Diesel engine fails to crank, the
starter makes clicking noises, or
the engine cranks very slowly
•
Almost certainly this is an electrical
problem. Display will indicate “LOW
START BAT”
The problem must be an electric malfunction.
•
Starter battery switched "OFF".
Check position of the battery switch and switch
"ON".
•
Starter battery voltage insufficient
(battery too weak).
Check battery voltage. Recharge the battery.
Inspect battery terminals and cables for a good
electrical connection (inspect against corrosion,
tattered wires, etc.)
•
Faulty fuse on the control panel
Replace fuse
•
Wiring control system faulty
During the normal starting process, the battery
voltage drops to 11V (with a fully charged
battery). If the voltage does not drop during
starting, the electrical connection is faulty. If the
battery voltage drops lower than 11V, then the
battery has been discharged too deep.
•
Starter broken
Repair the starter motor
•
To thick engine lubricating oil.
Change oil for a lower viscosity.
Starter is turning engine
smoothly, but engine fails to
start
•
Out of fuel or faulty fuel, water in the
fuel.
Fill up with fuel or replace with better quality.
•
Fuel solenoid is not opening (no “click”
can be heard).
Check wire connections and circuitry to solenoid.
(Refer to DC wiring diagram)
•
Fuel lift pump is not working.
•
Fuel filter is blocked.
•
Air in fuel lines.
Check fuel filter and fuel lift pump: clean or
replace if necessary.
Bleed air from fuel system (refer to maintenance
section).
•
Wrong valve clearance.
Adjust valve clearance,
•
Low compression because of dirty
valves.
Clean valves. Take off the injection bent and
inspect the outlet port. When little rust in the port
clean the valve by taking off the valve spring and
rotate until rust is removed. When the outlet port
is strongly affected by rust, the exhaust system is
not properly installed (refer to paragraph 5.4.3).
Contact
Whisper Power
service department for
advice.
•
Blocked injector.
Have the injector tested and cleaned if necessary.
•
Loss of compression by wear out or
damage
Repair by
Whisper Power
service
Engine runs irregularly.
•
Unsuitable contaminated fuel
•
Lack of fuel.
Fill up with fuel or replace by better quality.
•
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.
Check and repair
•
Choked air filter.
•
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).
•
Faulty electronic governor
Replace faulty parts.
•
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).
•
Ongoing hunting caused by faulty
electronic governor
Replace faulty parts.
Engine speed drops
•
Faulty electronic governor
Replace faulty parts.
