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Problem solving
It is assumed that the engine is in good condition and
that there is adequate fuel flow to the filter and
injection equipment.
Make sure that the wires are not damaged and that
they are clamped tight to their terminals.
An electrical fault must be traced by an
electrician.
For position of dip switches refer to
section Electrical system.
Problem Possible faults Corrective actions
1. Starter motor does not crank engine
after switching startbutton (S) to
””.
a. Low battery output. a. Check electrolyte level and charge battery. If no cells are
shorted and battery is discharged, trace cause and
correct.
2. Starter motor cranks engine when
switching start button (S) to ” ”, but
engine does not fire.
a. Low battery output. a. See corrective action 1.
3. Engine fires, but engine stops when
releasing start button (S).
a. Alternator drive belt broken or slipping.
b. Alternator/regulator defective.
a. Check and correct if necessary.
b. Have assembly repaired.
4. Hourmeter (P1) does not count
running time.
a. Hourmeter (P1) defective. a. Replace.
5. Engine is running, but shuts down
immediately after start button (S) has
been released.
a. Start button (S) released too soon.
b. Insufficient engine oil pressure.
c. Fuel tank contains insufficient fuel.
a. Release button after engine oil pressure has built up
above the minimum allowed level.
b. Stop at once, consult the engine instruction manual.
c. Fill fuel tank.
6. Compressor is loaded automatically to
full capacity after starting.
a. Loading valve stuck in loading position.
b. Air intake throttle valve stuck in opened position.
c. Air leaks in regulating system.
a. Remove and dismantle loading valve. Correct if
necessary.
b. Check and, if necessary consult Atlas Copco.
c. Check hoses and their fittings. Stop leaks; replace
leaking hoses.
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