Due to the electric control Industrial Valves on the site is in direct contact with the modulated medium, work environment is very bad, so easy to produce all kinds of fault, the following every instrument valve factory in Shanghai to introduce the fault processing method.

in the process of production, in addition to eliminate these problems at any time, also must carry out regular maintenance and preventive maintenance. Especially for use at bad environment regulator, more should pay attention to maintenance and preventive maintenance. Different forms of electric control valve, and its failure and its reason is not the same. A:

fault actuator is not action, but the power control module and 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:

actuators 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:

adjusting the system parameter setting properly actuator frequency oscillation. 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 ac 2 v 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, creeping, action is slow. Treatment 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 & other; Zero & throughout; And & other Travel & throughout; Potentiometer adjustment is correct; Replace control module. Seven:

fault signals after actuator fully open or close, no limit switch.

processing method: check the function selection switch control module in the correct position; “ Zero & throughout; And & other Travel & throughout; Potentiometer adjustment is correct; Replace control module. Eight:

fault actuator range, chirping. :

processing method, mainly because the sensitivity on too high insensitive 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 Industrial Valves selection, valve used in small open work.

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.

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