Atlas Copco ORV 10 Instruction Manual page 29

Instruction Manual
Problem
7. Compressor overheating.
(LP air outlet temperature
and interstage pressure
above normal value)
(HP air outlet temperature
above normal value)
8. Interstage pressure below
normal.
9. Interstage pressure above
normal.
10. Oiltronix™ failure
Possible faults
a. Insufficient compressor cooling.
b. Oil cooler (OC) clogged externally.
c. Oil cooler (OC) clogged internally.
d. Oil filters (OF) clogged.
e. Oil level too low.
f. Thermostatic by-pass valve (TBV) remains
stuck in closed position.
g. Cooling fan (F) defective.
h. Oil stop valve (OSV) malfunctioning.
i. Oil separator element clogged.
j. By-pass valve (BV) leaking.
k. LP compressor element (CEL) not in order.
l. HP compressor element (CEH) not in order.
a. Choked air filter elements.
b. Leak between LP and HP compressor elements.
c. LP compressor element (CEL) not in order.
a. By-pass valve (BV) leaking.
b. LP compressor element (CEL) not in order.
(1)
(2)
Corrective actions
a. Locate unit away from walls; when banked
with other units, leave space between them.
b. Clean oil cooler.
c. Consult Atlas Copco.
d. Replace oil filters.
e. Before checking oil level, wait approx. 10
minutes after unit has stopped. Add oil if
necessary.
f. Remove and check thermostatic by-pass
valve for proper opening and closing
temperatures. Replace valve if out of order.
g. Replace fan.
h. Remove and inspect oil stop valve. Replace
if necessary.
i. Replace oil separator element.
j. Remove and inspect by-pass valve. Replace
if necessary.
k. Consult Atlas Copco.
l. Consult Atlas Copco.
a. Clean or renew air filter elements.
b. Remove interconnecting pipe and inspect
O-rings. Replace if necessary.
c. Consult Atlas Copco.
a. Remove and inspect by-pass valve. Replace
if necessary.
b. Consult Atlas Copco.
Manually locking the valve (temporary
solution)
Disconnect the connector (1) of the stepper
motor, to ensure that the stepper motor does not
try to rotate the valve.
Rotate the white coupling of the valve manually
until the blind hole (2) in the coupling is in line
with the threaded hole (3) in the housing.
– Check the correct position of the blind
hole with a ∅ 4 mm pin.
(3)
Block the valve by screwing a bolt (M5 x 20)
through the housing and in the blind hole in the
coupling.
– Let an Atlas Copco technician repair or
replace defective parts asap
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