An actuator moving without blade movement is a life-safety/startup failure until proven otherwise. Stop, verify power/linkage/blade movement, and correct per manufacturer direction before passing commissioning.
FSD [tag] actuator hums/turns but the blades do not move. I checked power/linkage and whether the blade pack is binding. Do you want controls/manufacturer startup involved, or should we correct linkage per the install sheet first?
Watch out
Do not mark an FSD passed because the motor makes noise.
Check
Identify damper tag, actuator model, fail position, and control signal/power status.
Check whether the actuator shaft/linkage is slipping or the blade pack is binding.
Verify blades move freely only by the approved/manual method.
Check sleeve/frame damage, incorrect orientation, or interference with retaining angles/wall.
Document and retest before cover/commissioning signoff.
Steps
Identify damper tag, actuator model, fail position, and control signal/power status.
Check whether the actuator shaft/linkage is slipping or the blade pack is binding.
Verify blades move freely only by the approved/manual method.
Check sleeve/frame damage, incorrect orientation, or interference with retaining angles/wall.
Document and retest before cover/commissioning signoff.
Say this to your foreman
FSD [tag] actuator hums/turns but the blades do not move. I checked power/linkage and whether the blade pack is binding. Do you want controls/manufacturer startup involved, or should we correct linkage per the install sheet first?