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10
Motor overload cut-out
If the safety cut-out has tripped, the motor has been overloaded in some way.
The button on the motor overload cut-out (1) will pop out a couple of
millimetres when it has been tripped and is reset by pushing it back in.
There are a number of possible reasons why the overload cut-out might
trip such as a voltage drop caused by the use of long extension leads, low
ambient temperature (under 10 °C), or that the pressure switch is not used
to turn the compressor on/off in the event of a power cut for example.
Care and maintenance
• The compressor’s first oil change should be done after 10 hours of operation.
• Change the oil and clean the air filter after every 120 hours of use. Check the safety valve
and pressure gauges at the same time.
• Check the safety valve regularly by unscrewing it. If the safety valve is working properly
(and the pressure vessel is under pressure) air should seep out through the safety valve.
• Perform a visual inspection at least once a year to check that the inside and outside of
the pressure vessel is free of corrosion. Under no circumstances must the wall thickness of
the pressure vessel be less than 2 mm.
• The safety valve must under no circumstances be manipulated or blocked.
• Regularly check that the ventilation port in the oil filler cap (11) is open.
• Regularly check that all bolts holding the compressor and pressure vessel together are tight.
• Make it a habit to open the drain tap regularly to release any trapped condensation in
the pressure tank. Depressurise the compressor by unscrewing the safety valve and let it
cool down completely before opening the drain tap.
• Do not clean the compressor or pressure vessel with solvents or flammable liquids.
• If the compressor is not to be used for an extended period, unplug it from the mains, depressurise
the tank by unscrewing the safety valve and drain the tank using the drain valve (9).
Changing the oil
1. Turn off the compressor and pull out the plug from the mains outlet. Depressurise the compressor
by unscrewing the safety valve.
2. Remove the oil filler plug (11).
3. Tilt the compressor so that oil can run out of the oil filler hole into an appropriate receptical.
4. Let the oil completely drain from the compressor.
5. Replace with new oil until the oil reaches the middle of the oil-display window. Refit the oil filler plug.
Oil capacity: Approx 1 dl.
• Use SAE 30 compressor oil at temperatures above +10 °C.
• Use SAE 10 compressor oil at temperatures below +10 °C.
Compressor oil is especially designed for compressors, e.g. it has additives that prevent foaming.
If no compressor oil is available then SAE 10-30 engine oil can be used as a substitute.
