A.C. Motor Checks before installation
1. Check the insulation resistance of the windings. Phase stud to the frame should be greater than 10 M.Ohm.
2. Check phase to phase resistance. Any phase stud to any phase stud should be less than 0.1 Ohm. Make sure you test resistance of your meter and subtract this number from phase to phase reading.
3. Make sure there is no water in the motor.
4. Apply 12V across the red and black speed sensor wires. Now use a volt meter between the red and blue wires to record a varying voltage when the motor is turned. Move the volt meter lead from the blue wire to the white wire and again read a varying voltage when the motor is turned.
A.C. Motor Checks after installation
a. Make sure motor is aligned correctly with the rear axle.
b. Make sure no washers or nuts between the motor cables and the controller cables.
c. Make sure the motor stud nuts have been tightened to 20Nm (14.75 lbft).
d. For the motor to run correctly the phase leads and the speed sensor feedback wires have to correspond.
i. If the motor is turning very slowly or just oscillating then try moving any two phase leads.
ii. If the motor is running but forward direction is slower than reverse direction this means the motor needs to have both it's phase and speed encoder swapped. To complete this, change the blue and white wire connections from the speed sensor and change any two phase leads over.