SCREW AIR COMPRESSOR CANNOT START STARTUP TROUBLESHOOTING GUIDE

When the screw air compressor cannot start, you can check the following common fault points step by step:

1. Power supply related issues

Check whether the power supply voltage is normal, whether there is a phase loss, low voltage or high voltage (can be measured with a multimeter).

Confirm whether the power switch, fuse or circuit breaker is tripped or damaged. If it is tripped, check whether there is a short circuit and then reset it.

Check whether the power cord connection is loose or has poor contact, especially the plug, terminal block and other parts.

2. Control circuit failure

Check the fault indicator light on the control panel and locate the problem according to the displayed fault code (such as overload, overtemperature, overpressure, etc.).

Check whether the emergency stop button is pressed and not reset, or the button itself is damaged.

Check whether the relay and contactor are sticky or damaged, and whether the coil is energized normally (you can hear the sound of suction or measure the voltage).

3. Action of protection device

Pressure protection: If the pressure in the gas tank exceeds the set value, the pressure switch will cut off the power supply. It is necessary to release some gas until the pressure is lower than the set value before trying to start.

Temperature protection: When the oil temperature or exhaust temperature is too high, the temperature control switch will trigger the protection. It is necessary to wait for the equipment to cool down and check the cooling system (such as whether the fan or radiator is blocked).

Overload protection: When the motor is overloaded, the thermal relay will be activated. It is necessary to check whether it is caused by excessive load, motor jam, etc., and restart after resetting.

4. Mechanical and other problems

Check whether the motor is stuck. You can manually turn the motor fan. If it cannot rotate, it may be due to bearing damage or screw jam.

Check whether the oil-gas separator and filter are blocked, causing excessive resistance and affecting startup.

Some models have interlock protection (such as the door cover is not closed tightly), and it is necessary to confirm whether the relevant parts are in place.

Operation precautions

1. Safety first: Be sure to turn off the power, release the pressure, and hang a warning sign before maintenance.

2. Check step by step: from simple to complex (such as power → control → machinery).

3. Record data: Pay attention to operating parameters (voltage, current, temperature, etc.) to assist diagnosis.

When checking, it is recommended to start with simple external factors such as power supply and control buttons, and then gradually check the internal components, and contact professional maintenance personnel if necessary.

Qingdao Futai is your one-stop supplier of all air compressor parts to keep your air compressor at its best performance. If you are interested in our products and want to know more, please click the message icon in the lower right corner and select the contact information you want to use to contact us.

Some models have interlock protection (such as the door cover is not closed tightly), and it is necessary to confirm whether the relevant parts are in place.