Trouble-shooting table for electrical system
4
L / M . . / 07.96
Trouble-shooting at the starting device
Malfunction
Starter motor
continues to run
after switch was
released.
Engine does not
start or starts
reluctantly, alt-
hough the starter
motor is turning
strongly.
Indication
Noise of rotation.
Cause
Starter relay defective.
Pre-heat/switch does not
return automatically from
position 3 to position 1.
Diode in shutdown soleno-
id (lifting or servo electro-
magnet) is defective.
Valve solenoid on moni-
toring block is not opening.
Pre-heat system is defecti-
ve (only significant at
temperatures below
-10 to -15°C.)
Remedy
Switch of engine manually
at once (set speed control
lever to „stop“ and discon-
nect battery). Consequential
damage: electronic compo-
nents destroyed.
For example: diodes in
generator. Check switches,
relays and generator, renew
parts if necessary.
Set pre-heat/start switch to
0 immediately using force if
necessary and renew it. If
this is not possible:
disconnect the battery
immediately.
Consequential damage: dio-
des in generator destroyed.
Attention!
Unless the above measu-
res are taken within 2-3
minutes, the starter motor
will burn out (overheating)
Renew solenoid.
Check operation of valve
solenoid and renew if
necessary.
Check pre-heat circuit and
renew any defective parts.
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