Atlas Copco XRVS455 Md, Instruction Manual

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20
XRVS455 Md
Problem
6. Hourmeter P3 does not
count running time.
7. Compressor is loaded
automatically to full
capacity after starting.
8. Engine does not speed up
immediately after
compressor load push
button has been pressed
and compressor does not
deliver air.
9. Excessive compressor oil
consumption. Oil mist
being discharged from air
outlet valves.
10. Air consumption varies at
pressures above working
pressure, but engine does
not accelerate nor
decelerate.
11. Compressor capacity or
pressure below normal.
Possible faults
d. Engine temperature switch S14 or fuel
level sensor B6 defective.
e. Low coolant level.
a. Hourmeter defective.
a. Loading valve stuck in loaded position.
b. Air intake throttle valve stuck in open
position.
c. Air leaks in regulating system.
a. Membrane of regulating valve cracked.
b. Air intake throttle valve stuck in closed
position.
a. Oil level too high due to overfilling or
formation of condensate in oil tank.
b. Flow restrictor in oil scavenging line of
air receiver clogged.
c. Oil separator element defective.
a. Speed regulator defective.
a. Air consumption exceeds capacity of
compressor.
b. Choked air filter elements.
c. Regulating valve defective.
d. Engine not up to max. load speed.
e. Blow-down valve stuck in open position.
f. Oil separator element clogged.
g. Air intake throttle valve remains
partially closed.
h. Safety valve leaking.
i. Bleed-off valve leaking.
Corrective actions
d. Stop at once. Test switches; replace as necessary.
e. Fill coolant tank.
a. Replace.
a. Remove and dismantle. Correct as necessary.
b. See 11f.
c. See 12b.
a. If air blows from venting devices, remove and
dismantle valve. Replace membrane.
b. See 11f.
a. Unscrew filler plug one turn and wait until all pressure
is released. Drain oil until the oil level shows in the
sight glass.
b. Remove hoses and clean flow restrictor.
c. Have element removed and inspected by an Atlas
Copco Service representative.
a. Remove, dismantle and inspect parts.
a. Check equipment connected.
b. Remove and inspect elements. Clean or replace, if
necessary.
c. Dismantle and inspect parts.
d. When engine control lever is against max. speed stop,
check speed and in case of power loss, see "Operating
Instructions" book of the engine. If lever is not against
stop, remove and inspect speed regulator and adjust
length of operating rod.
e. Check and correct as necessary.
f. Have element removed and inspected by an Atlas
Copco Service representative.
g. Remove air filters, air intake manifold and throttle
valve spring seat. Withdraw the valve and inspect.
Replace parts where necessary. Caution: the spring seat
is fixed with 4 short and 2 long setscrews: first remove
the short screws, then release the spring tension by
alternately unscrewing the long ones.
h. Remove and inspect. Replace if not airtight after
reinstallation.
i. Remove and inspect. Replace if necessary.