Mechanical failure
After pulling the hand-electric switch handle, drive the valve with the handwheel to check whether the hand-electric switch is sensitive and reliable.
Check the mechanical opening indicator for correct operation and indication.
If the hand wheel does not move and the valve is blocked, remove and repair the valve.
If manual operation is normal and there is no interference, and the valve stem does not move, check whether the connection of the valve stem joint is reliable.
If the valve is available for handwheel drive, recheck the electrical section.
Electrical fault
First check the action of the controller, then check the action of the electrical installation.
Check whether the main power supply and control power supply, relay, fuse and all indicator lights and switches are normal.
If there is any problem with the control, check whether to replace the relevant parts. If there is no problem with the electrical components, then check the electrical installation.
Check the motor and replace if there is any problem.
If the micro switch failure, need to adjust or replace.
Other electrical faults can be solved by replacing related components.
