Atlas Copco XAS96JD - Starting and Stopping the Compressor; During Operation Guidelines

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3.3 Starting/Stopping
Fig. 3.2 Control panel
F1 Fuse reset
PG Working pressure gauge
H1 Temperature alarm (red)
H2 General alarm (red)
P1 Hourmeter
S1 Contact switch
S4 Lamp test
Before starting, first operate the circuit breaker button (Fl) at the
left of the control panel.
To start, the start button is turned clockwise to position 1, lamp H2
(general alarm) will go on. When the button is turned further to
position 3, the starter motor will set the engine in motion. Lamp
H2 will go out as soon as the engine has been started. The start
button automatically springs back to position 1. Lamp H1 only
produces a signal when the compressor outlet temperature is too
high. Correct operation of the lamp itself can be checked by
operating the lamp test button S4 located on the control panel.
When the start button is in position 1 and the engine is not
running, the lamp test can be used. Lamp H1 will go on and will
automatically go out when the unit is started. Shutting-down is
simply done by turning the start button counter-clockwise to
position 0 (with valves closed).
The control panel in addition indicates receiver pressure (PG) and
accumulated operating hours (P1).
Fault situations and protective devices:
— The starter motor is protected against prolonged starting
or against attempts to start when the unit is already running.
— A fault which occurs with the engine, either: oil pressure
(too low), oil temperature (too high), engine coolant (too high) or
alternator voltage (too low) will always and immediately cause the
engine to cut out and the control lamp H2 will go on. 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 unit immediately.
Both control lamp H1 and H2 will go on. Both control lamps will
remain on until the unit has been restarted (start button to position
3) or the contact is turned off (start button to position 0): also
when, due to cooling off, the thermocontact has closed again (=
memory function).
3.4 During Operation
ùù The doors must be closed during operation and may be
opened for short periods only.