Westerbeke BCD 4.4KW Betreibershandbuch PDF herunterladen (Seite 66)

Problem

Preheat is depressed:

no preheat.

Preheat is depressed:

fuel pump does not

operate.

Preheat is depressed:

fuel solenoid activation.

ENGINE TROUBLESHOOTING

probable Cause

Connection

switch.

Preheat solenoid.

Glow plugs are

faulty.

Faulty connections

bad pump.

Faulty connections

solenoid.

Voltage problem.

Verification/Remedy

Check

for

12 volts at the

PREHEAT switch and at the

S terminal on the preheat

solenoid.

activation with 12 volts

at the

S terminal. Tap solenoid

with a mallet

determine if it

is stuck internally. Solenoid

should produce a click when

activated and when deactivated.

Twelve volts are present at

the glow plugs. Remove each

plug and check the resistance

of the plugs

applying

volts

artificially.

Check

for

12 volts at the

fuel

pump

connections.

If 12 volts are present, the

pump is possibly faulty.

Tap pump with a mallet.

Pump's plunger may be stuck.

Remove the filter and check for

contamination which will affect

the pump.

Check

for

12 volts at ( + )

positive terminal at the back

of the fuel solenoid when the

PREHEAT button is depressed.

Twelve volts with no activation

indicates a faulty solenoid.

Less than

volts found at the

positive ( + ) terminal on the

solenoid will not properly

activate the solenoid and will

cause a failure. Check for low

batteries

voltage loss

small electrical wiring

corroded connections.

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