Atlas Copco XAS96 DdG Manuel D'instructions page 22

XAS96 DdG, DdG IT
3.3 S /S
TARTING TOPPING
3.3.1 G
ENERAL
F1
H2
Fig. 3.8 Control panel
P1 Hourmeter
F1 Circuit breaker button
PG Working pressure gauge
H1 Temperature alarm lamp (red)
H2 General alarm lamp (red)
S1 Contact switch
S4 Lamp test
Before starting first operate the circuit breaker button (F1) at the left
side of the control panel (open left-hand service door first).
22
P1
PG
H1
- +
S1
S4
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 group is started.
Shutting-down is simply done by turning the start button anti-
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:
Ð The starter motor is protected against prolonged starting
or against attempts to start when the group is already running.
Ð 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 .
Ð 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 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).