Rotork actuator Torque sensor problem

We have ROTORK valves, has an actuator model IQ10 , the problem is the local/remote mode doesn't works, we couldn't manipulate the valve locally or from control room (we can't open or close the valve ).

the actuator display displayed an alarm triangle (see the bellow photo) .

when we consulted the diagnostic menu on the valve with the remote control, we found

"torque sensor".

how to test the sensor or confirm that it is damaged before replacing it

please someone help me to solve this problem as soon as possible and it's the first time I work with this kind of valves.
 

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