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preheat relay K5 will be energized. The glow plug (HTR)
will be activated.
The preheat button (S4) should be held in this position for
10 to 15 seconds to allow for proper pre-heating of the
cylinders.
When the start button (S1) 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 (S1) 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.
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).
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: 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 deter-
mined what it was that caused the engine to fail: low
oil level, clogged-up cooler, slack alternator belt ten-
sion 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).
DURING OPERATION
When the engine is running, the airoutlet
valves (ball valves) must always beput in a
fully opened or fully closed position.
The doors 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 indicators (VI). If the
yellow piston reaches the red marked service range,
replace the filter element. Reset the indicators by
pushing the reset button.
3.
Check the air outlet temperature of the compressor
element.
4.
Check the engine oil pressure, the coolant tempera-
ture and display of control panel.
5.
Avoid the engine running out of fuel. Nevertheless, if
this happens, fill the fuel tank and prime the fuel sys-
tem to speed up starting.
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