Blue Robotics T200 Manual page 32

The propeller tries to move but does not spin
correctly
● All three thruster wires may not be connected to the ESC motor wires
correctly. Check that there is a good connection between the three ESC
motor wires and the thruster wires.
● There may be a broken thruster wire or a short between thruster wires.
Check the resistance of each thruster wire pair (blue wire/green wire,
blue wire/white wire, green wire/white wire) using a multimeter. Each
thruster wire pair should have the same resistance within 0.1-0.2ohms
or so. If there is no continuity between a pair, or one pair has
significantly higher resistance, the thruster is defective.
● Try to rotate the propeller by hand, it should spin freely. If it is difficult to
rotate, disassemble the thruster and check for damage or blockage.
The propeller is jammed and cannot be turned
by hand
● This can be caused by something jamming the propeller or by major
internal damage caused by overheating, short circuits, heavily worn
bearings, etc. Completely disassemble the thruster and inspect for
damage or blockage.