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1. Preparations before starting the air compressor
3.1.1 Check whether the mechanical parts and pipes of the air compressor are connected reliably. If there is any looseness, deal with it in time.
3.1.2 Check the oil level of the air compressor. When the oil level of the unit is higher than the lowest position on the oil gauge when the unit is stopped, the unit can start up and run normally, even if the oil level is invisible after the unit is running. It does not affect the normal use of the unit.
3.1.3 Rotate the coupling several times by hand in the specified direction to ensure the flexible rotation of the unit.
3.1.4 Check whether the electrical equipment complies with the requirements of safety regulations, and turn on the power supply of the unit after confirmation.

Second, the start of the air compressor
3.2.1 The following procedures should be followed when the air compressor is restarted after starting up or after the air compressor and its system equipment are overhauled:
a) Check whether all valves are in proper position and correct opening and closing state;
b) Remove all maintenance accessories (such as blind plates) and maintenance signs installed for safe maintenance;
c) Inspect the system and remove foreign matter inside it;
d) Open and close the blowdown valve again;
e) crank at least one turn to ensure no mechanical interference;
3.2.2 If there is no phase sequence error displayed on the unit control screen after the unit is powered on, you can press the “Start” button to start the unit normally. Safety protection devices are in proper operating condition
The screw compressor host is strictly prohibited to reverse under any circumstances! In the following cases, you must first confirm the host direction:
1) Commissioning of the new machine; 2) Rewiring of the power cord; 3) Phase commutation of the main power supply
The manufacturer assumes no responsibility for any damage or injury caused by disregarding these warnings and precautions
3.2.3 After the start-up process of the unit is completed, the air compressor will enter the automatic control state.

3. Operation of air compressor
3.3.1 After the unit is in normal operation, check whether there is oil leakage or air leakage everywhere in the unit. If there is, stop it immediately.
3.3.2 Check whether the operating parameters such as exhaust pressure and exhaust temperature are normal.
3.3.3 Make a good job operation record, and compare whether the operation parameters are always normal. If there is any abnormal phenomenon, it should be stopped in time and the reason should be analyzed and found.

4. Shutdown of the air compressor
3.4.1  If the unit needs to be stopped, just press the stop button, and the compressor will automatically unload for about 20-30 seconds and then stop. There is no special reason, do not use the emergency stop button to stop
3.4.2 Power off the unit