Electric control pneumatic valve common faults and processing methods

fault one: actuator is not action, but the power control module and the lights are bright.
processing method: check the power supply voltage is correct; Whether the motor wire break; Ten core plug from the end to whether wire terminal bolt; Motor, potentiometer, capacitance all plugs are in good condition; In contrast to swap method to determine whether a control module is good.
fault 2: actuator is not action, power light and signal light is not bright.
processing method: check input signal polarity is correct; In contrast to swap method to determine whether a control module is good.
fault 3: adjust the system parameter setting properly actuators frequent oscillations. Treatment method:
the controller parameter setting is not appropriate, will cause the system to produce different degree of oscillation. For single loop control system, the proportional band is too small, the integral time is too short, differential gain and differential time mostly system oscillation may be produced. Can through the system setting, the method of reasonable selection of these parameters, the loop stable speed.
fault 4: actuator motor fever quickly, concussion crawling, stop action within a short period of time.
processing method: using V ac voltage profile measurement control module whether the input ac interference; Check whether signal lines and power cord isolation; Potentiometer and potentiometer wiring are in good condition; Feedback component action is normal. Five:
fault actuator action with step by step, crawl phenomenon, action is slow.
processing method: check operator signal from the action time is correct. Fault 6:
actuator position feedback signal is too big or too small.
processing method: check the 'zero' and 'stroke' potentiometer adjustment is correct; Replace control module. Fault 7:
add actuator signal when fully open or close, no limit switch.
processing method: check the function selection switch control module in the correct position; 'Zero' and 'stroke' potentiometer adjustment is correct; Replace control module. Eight:
fault actuator range, chirping.
processing methods: mainly because sensitivity adjusted too high, not sensitive area is too small, too sensitive, the actuator small oscillation circuit cannot be stable, can reduce the sensitivity counterclockwise fine-tuning potentiometer sensitivity; Fluid pressure change is too big, thrust actuator; Regulating pneumatic valve selection big, often in a small open of the pneumatic valve.
fault 9: actuator movement is not normal, but limit switch motor does not stop after the action.
processing method: check whether there is limit switch, limit switch wiring fault; Replace control module.
failure: 10 actuators belt is broken.
processing method: check actuator damage internal driving part is stuck; 'Zero' and 'stroke' potentiometer adjustment is correct; Limit switches are correct.