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Faulty analysis and maintenance of electric actuator

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Fault phenomenon

Cause

Solution

Motor does not start

Fail to connect to the power supply

Connect the power supply

The power supply voltage is incorrect or too low

Check whether the voltage is normal

Broken wire, connector separates from terminal separation

Repair the broken wire and connect terminal correctly and solidly

Action of limit switch is not good

Repair the broken wire and connect terminal correctly and solidly

Starting and running capacitance is not good

Contact the manufacturer to replace the capacitor

Overheat protector acts (whether the ambient temperature is too high and whether the valve is stuck)

 

Reduce the ambient temperature and check whether the opening and closing of the valve are normal by manual method

The opening and closing indicator light is not on

Action of limit switch is not good

Replace the switch

Poor adjustment of stop

Re-adjustment

The bulb is broken

Change the bulb

 

The motor cannot stop when it reaches the limit position

The limit switch is connected to the control circuit with wrong wiring

Adjust wiring

Poor action of wiring switch

Change the switch

The phase sequence of DC24V and AC380V main power supply is reversed

Adjust phase sequence

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