Atlas Copco XAS 185 CD7 T4, Instruction Manual, Page: 25 / 40

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8. Check the air filter service indicator (VI). If the red part
shows completely, service or replace the filter element.
Reset the indicator.
9. Open an air outlet valve (AV) to allow air flow to the
atmosphere.
Starting/Stopping
Before starting, first operate the circuit breaker button (Fl)
located on the back of the control panel cover. To start, the
start button is turned clockwise to position 1, lamp H2
(general alarm) will go on and the preahest relay K5 will
be energized. If needed, press button S4 to activate the K5
Relay and the glow plugs (HTR). The button should be
held in this position for 10 to 15 seconds to allow for
proper pre-heating of the cylinders. Holding glowplug
button for more than 60 seconds can cause damage to the
engine. 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.
Make sure one discharge valve is opened at time of
start-up to regulate engine speed at higher rpm for
proper warm-up – stay out of path of discharge valve
during process.
Lamp H1 only produces a signal when the compressor
outlet temperature is too high Shutting-down is simply
done by turning the start button counter clockwise to
position 0 (with valves closed).
During operation, the canopy must remain closed and
can only be opened for short periods.
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 attempts to start
when the unit is already running.
— A fault which occurs with the engine, either: engine oil
pressure (too low), compressor 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 bro-
ken 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).
F1 Fuse reset (Circuit breaker) located inside the unit on
the control panel’s cover
H1 Temperature alarm (red)
H2 General alarm (red)
PG Working pressure gauge
P1 Hour meter
P2 Fuel gauge
S1 Contact switch (engine ignition)
S4 Preheat button
P1
PG H1,H2 S1
S4
P2
E F
1/2
F1