During Operation; Stopping Procedure; Fault Situations And Protective Devices - Atlas Copco XAHS 37 DD Instruction Manual

Instruction Manual
3.2.4 D
URING OPERATION
When the engine is running, the air outlet valves (ball
valves) must always be put in a fully opened or fully
closed position.
The hood must be closed during operation and may be
opened for short periods only.
Regularly carry out following checks:
1. That the regulating valve (RV) is correctly adjusted, i.e. starts
decreasing the engine speed when reaching the preset working
pressure in the receiver.
2. Check the air filter vacuum indicator (VI -
piston reaches the red marked service range, replace the filter
element. Reset the indicator by pushing the reset button.
3. On compressors with aftercooler, check that the automatic drain
of the water separator is operative without air leakage.
3.2.5 S
TOPPING PROCEDURE
3 min
Fig. 3.18

Stopping procedure

1. Close the air outlet valves
2. Run unloaded for 3 minutes.
3. Turn the start switch S1 counterclockwise (CCW) to position 0.
4. Push the circuit breaker button (F1) once (open hood first).
A
Fig. 3.19 Positions of circuit breaker button
Circuit breaker button should now be in position A.
Fig. 2.3). If the yellow
(Fig. 2.3, AOV).
B
3.2.6 F
AULT SITUATIONS AND PROTECTIVE DEVICES
– A fault which occurs with the engine, either: oil pressure (too
low), oil temperature (too high) or alternator voltage (too low)
will always and immediately cause the engine to cut out and the
control lamp H2 will light up. By doing some simple checks, it
can be determined what it was that caused the engine to fail: low
oil level, clogged-up cooler, slack alternator belt tension or
broken belt.
– When the outlet temperature of the element becomes too high, a
thermocontact will also switch off the group immediately. Both
control lamps H1 and H2 will light up. Both control lamps will
remain on until the group has been restarted (start switch to
position 3) or the contact is turned off (start switch to position 0);
also when, due to cooling off, the thermocontact has closed again
(= memory function).
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