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2. On water-cooled compressors, close the cooling water drain valves. Open the cooling water inlet
valve and the regulation valve.
3. Switch on the voltage. Start the compressor and stop it immediately. Check the rotation
direction of drive motor (M1) while the motor is coasting to a stop. The correct rotation
direction of the drive motor is indicated by an arrow shown on the motor fan cowl.
If the rotation direction of the drive motor is incorrect, open the isolating switch and reverse
two incoming electric lines.
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4. On air-cooled compressors, check also the rotation direction of the fan motor. Rotation
arrows, visible through the grating in the roof, are provided on the plate below the fan to
indicate the correct rotation direction of the fan motor.
If the rotation direction of the fan motor is incorrect, open the isolating switch and reverse
two incoming electric connections at the terminals of circuit breaker (Q15).
5. Check the programmed settings. For compressors equipped with an Elektronikon® Graphic
controller, consult section
Programmable settings.
6. Start and run the compressor for a few minutes. Check that the compressor operates normally.
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1. If the compressor has not run for the past 6 months, it is strongly recommended to improve the
lubrication of the compressor element before starting. See section
Initial start.
2. Check the oil level. Top up if necessary. See section
Initial start.
3. If necessary, empty the dust trap of the filter; see section
Air filter.
If the red part of the air filter service indicator shows full out, replace the air filter element.
Reset the service indicator (VI) by pushing the knob in the extremity of the indicator.
4. On water-cooled compressors, also:
• Check that the cooling water drain valves in the inlet and outlet pipes are closed.
• Open the cooling water inlet valve.
• Open the water flow regulating valve. This step can be skipped if the setting of this valve
has not been changed.
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