TROUBLESHOOTING
M-GV/2, M-GV/3, M-GV/3+, M-GV 8, M-GV 10, M-GV 12 and M-GV 15
Ͷ
May 2018
Ͷ
EN
23
PROBLEM
CAUSE
SOLUTION
Engine does not stop on command
x
Fuel solenoid is not switching off
x
Loss of control
Faulty Digital Diesel Control unit. Stop the engine
manually using the stop lever.
Check wire connections to stop solenoid. Check
solenoid valve function. Replace if necessary.
Engine exhaust smokes
x
Faint blue smoke - generally the result of
light load
Increase load.
x
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
x
When the engine RPM is ramping up to
react at a load step some smoke may be
unavoidable.
x
Wrong setting of minimum RPM.
x
Sooty
black
smoke
ʹ
incomplete
combustion caused by: overload, choked
air filter, air inlet temperature too high,
unsuitable fuel or water in fuel.
x
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
x
Continuous running with very low load.
Increase load and have the engine run for a few
hours
Engine starts, but stops after 10 up
to 30 seconds
x
Protection system stops the engine; this
can be caused by oil pressure failure,
loose wire or faulty alarm switch. Digital
Diesel Control will help to indicate
failure.
x
Faulty alarm switch/sensor
Refer to Chapter 3 and page 24 and the DDC
operating manual for information on the alarm
system. Bypassing a switch can help to confirm the
failure. But be aware: running with a by-passed
alarm switch can cause damage!
Replace the switch. By-passing the switch makes it
possible to keep running. But be aware: running
with a by-passed alarm switch can cause damage!
Engine stops by itself
x
Overload or short circuit
Switch off the consumers and test for short circuit.
x
Lack of fuel
Check fuel supply system: tank level, fuel lines,
pump, filter, valves, etc.
x
Cooling water temperature too high
(>105°C)
Check cooling system
x
Oil pressure low (oil pressure switch
tripped)
Check oil level
Check oil pressure and have engine repaired by
WhisperPower if necessary.
x
Air or water in the fuel.
x
Blocked air or fuel filter.
Check and clean
x
Loss of compression by wear out or
damage.
Repair by WhisperPower service.
Loss of power
x
Wrong measurement.
Check if the load is measured correctly. Does the
Amp meter show the correct value? When
calculating the load by multiplying voltage and
amps this should be done using the exact values,
taking into account the power factor of the
consumers. When in doubt, measure the power
directly using an appropriate instrument.