Atlas Copco XAS97 Dd - Page 30

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XAS97 Dd
Problem Possible faults Corrective actions
5. Starter motor cranks engine
when switching start button
(S1) to ” ”, but engine
does not fire.
a. Contact switch (S1) defective.
b. Fuel solenoid (Y1) defective.
c. Low battery output.
a. See remedy 1d.
b. Check solenoid and its valve, correct or
replace if necessary.
c. See 1a.
6. Engine fires, but general
alarm lamp (H2) remains
alight; engine stops when
releasing start button (S1).
a. Alternator drive belt broken or slipping.
b. Alternator (A)/regulator defective.
a. Check and correct if necessary.
b. Have assembly repaired.
7. Engine is running, but shuts
down immediately after (S1)
has been released.
a. Contact switch (S1) 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 value.
b. Stop at once, consult the Engine Operation
Manual.
c. Fill fuel tank.
8. General alarm lamp (H2)
remains alight for over 5
seconds after starting.
a. Insufficient engine oil pressure or too high engine
oil temperature.
b. Engine oil pressure switch (S3), or compressor
temperature switch (S5) defective.
c. Relay (K1) defective.
a. Stop at once, consult Engine Operation
Manual.
b. Stop at once, test switches, replace as
necessary.
c. Replace (K1).
9. Hourmeter (P1) does not
count running time.
a. Hourmeter (P1) defective. a. Replace.
10. Compressor does not unload
and engine keeps running at
maximum speed when
closing the air outlet valves;
safety valve blows.
a. Air leaks in regulating system.
b. Regulating valve (RV) incorrectly set or defective.
c. Unloading valve (UV) or its actuating piston stuck.
a. Check and repair.
b. Adjust or repair regulating valve; see section
5.1.
c. Repair unloading valve assembly.
11. Compressor capacity or
pressure below normal.
a. Air consumption exceeds capacity of compressor.
b. Choked air filter elements (AF).
c. Unloading valve (UV) not completely open.
d. Engine does not run at max. speed.
e. Oil separator element (OS) clogged.
a. Check equipment connected.
b. Replace air filter element (AF).
c. Speed regulation cable maladjusted; see
section 5.1.
d. Check the maximum speed, service the fuel
filter.
e. Have element removed and inspected by an
Atlas Copco Service representative.