19
Instruction Manual
3.3 S
TARTING
/S
TOPPING
Fig. 3.10 Control panel
Before starting make sure, the electrical circuit is not interrupted by
the circuit breaker (F1), located at the bottom of the control panel
(open hood first).
If the machine is equipped with a cold start (option), if necessary,
first push the cold start button S6 for a short period.
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 pushing the lamp test
button S4.
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.
Shut-down procedure:
1/ Close the air outlet valves (AOV). Run unloaded.
2/ Turn the contact switch (S1) counterclockwise (CCW) to
position 0.
The control panel in addition indicates receiver pressure (PG) and
accumulated operating hours (P1).
Fault 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 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 D
URING
OPERATION
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 - Fig. 2.3). If the yellow
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.
P1 PG H1
H2
S1 S4F1
S1 S6F1 S4
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
S6 Cold start button
Without cold start
With cold start (option)
The circuit breaker button is a protection against
unintended starting of the compressor and a safety
switch.
The hood must be closed during operation and may be
opened for short periods only.
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