No matter what is used for a long time, there will be some minor problems. Although it will not affect the work for a while, if it is not handled in time, small faults will turn into big problems. Electric actuators are no exception. There will be more or less some faults in the process of work. At this time, we must learn some simple methods to facilitate our own use. Let's see what to do if the indicator light of the electric actuator is not on and what are the common faults of electric actuators and how to deal with them!
What to do if the indicator light of the electric actuator is not on
When the electric actuator is powered on, if the indicator light is not on, it means that the signal action will not work. At this time, you should check whether the fuse is intact. If it is intact, through comprehensive fault analysis, it is very likely that the power supply part of the servo board is faulty. Then use a multimeter to test the indicator light, or try to replace the indicator light to see if it is the fault of the indicator light.
Common faults and treatment methods of electric actuators
Power supply fault alarm
For example, when the power supply is connected, the background light of the actuator display screen is not on, the valve position indicator light is not on; the three-phase power supply trips as soon as it is sent. You can check whether the three-phase power supply is normal and whether it matches the nominal voltage on the actuator nameplate, check whether the actuator fuse is blown or the mainboard power line is loose and not plugged in properly. Shake the motor insulation to determine whether the motor coil is burned out.
Improper setting of parameters of the electric head or main control alarm failure
For example, the torque setting of the torque type electric head is too small. The valve is not closed tightly, resulting in internal leakage fault; or it cannot stay in the set stroke position when fully open/fully closed, and the valve stem and the valve body collide; by using the setter online to reset the appropriate parameters, this type of fault can be quickly handled. In addition, the low voltage of the 9V battery inside the IQ type electric head will also cause more main control alarm faults. Such faults can be handled by replacing the battery and resetting the parameters.
Electric head actuator failure
This type of failure includes the internal sleeve of the actuator being stuck, threaded or loose, causing the valve stem to have no output; the manual automatic clutch spring is stuck in the manual direction, causing the manual to be normal, but the electric cannot be switched; the actuator lubricating oil has dried up, and the valve is stuck. The processing of this type of failure requires offline disassembly and repair.
Fault of the electric head circuit board
This type of fault includes:
1. The actuator operates normally, but there is no valve position feedback. The 22/23 circuit is only about 1~3mA. Resetting does not work. Replace the servo release position return board;
2. The displayed valve position is inconsistent with the actual valve position. After resetting the limit, the action is several times, and drift still occurs. The counter board should be replaced.
3. The actuator works, but there is no valve position indication. Check the counter. The circular magnet may be broken or the counter board is broken.
4. In the remote control adjustment state, the up and down swings cannot be positioned. The "dead zone adjustment parameter Fd" can be increased; but if the parameter is increased to more than 20 before it stops swinging, the servo release (position return) board can be replaced; when the actuator is manual/automatic, the displayed valve position does not change, the feedback does not change, and the "limit open/close LO/LC" parameter cannot be set. The main board is broken, replace the main board. The actuator remote control is normal, and the "actuator alarm" is issued when it is controlled locally. Replace the local control board.