Electric actuator (electric actuator) common troubleshooting method

Here are the general fault resolution methods for various electric actuators (electric actuators), which may vary from brand to brand and model. In addition, if you can understand the structure and working principle of the electric actuator, it is very useful for judging the intention. Structure and working principle,

malfunctionthe reasonMethod of exclusion
The motor does not start1. The power supply is unreachable or lacks phase;
2. The power supply voltage is low;
3. The motor coil is embedded with the overheat protection switch action (motor overheating);
4. The valve or actuator itself is stuck;
1. Check the power supply;
2. Check the voltage;
3. See if the motor can be eliminated after the temperature drops.
4. Try the manual operation with the actuator handwheel
The motor stops during the switch operation1. The load is too large, so that the force distance protection switch operates;
2. The motor coil is embedded with the overheat protection switch action (motor overheating);
3. Control circuit board failure.
1. Try to increase the torque protection setting value;
2. See if the fault can be eliminated after the motor temperature drops;
3. Replace the board
Electrical limit switch can not be limited1. Motor reversal;
2. The limit switch is damaged;
3. The position of the limit is not adjusted.
4 board damage...
1. Try to replace the motor wiring, or replace the phase separation capacitor, otherwise replace the motor;
2. Replacement limit development;
3. readjust
4. Replace the board
The motor is running but the valve is not moving1. The switching mechanism is not normal;
2. Connection problems;
1. open the inspection;
2. Check the connection.
Manually1. The switching device is not closed;
2. Mechanical stuck;
1. Conversion switching device;
2. Eliminate the cause of the card death.
Stem vibration at start-upStem nut loose or improperly fastenedRemove the stem cover or pipe plug and tighten the lock nut
Poor insulationEntering rainwater (poor wire inlet seal)1. Repair the sealing parts;
2. Drying electrical components and motors;
3.Pay attention to the wire inlet seal.
Oil spill1. Seal damage;
2. The ambient temperature is high and the pressure in the main tank is increased.
1. Check the repair seal;
2. Loosen the screw that does not affect the work, (preferably oil plug) exhaust.
The site control is normal, the remote control does not1. Board damage
2. Control signal line damage
3. Control signal is wrong
1. Replace the circuit board;
2. Check the control signal line;
3. Check the wiring.
The on-site control is normal and the remote control valve position disappears.1. The position sensor is broken;
2. The itinerary is not set;
3. The board is broken.
1. Check the sensor;
2. Reset the itinerary;
3. Replace the board.
One-way action1. The board is faulty;
2. A certain limit.
3. Motor damage
1. Replace the circuit board;
2. Re-adjust the limit;
3. Replace the motor

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