2-6 Receiving & Installation
1st Time Power Up Procedure (or after a motor is replaced) Caution: If full AC Voltage is applied and the motor
connections are wrong, the control will be damaged. Apply
10% of the input voltage to test motor lead connections at
the first time power up or after a motor is replaced.
It is strongly recommended that a Variac (AC Rheostat) be used for the
first time power up procedure. If full AC power is applied to the control
and the motor leads are incorrectly connected (wrong phase) the control
will be damaged.
1. Using a Variac (AC Rheostat) apply 10% of the rated AC input
voltage to the control.
2. Slowly turn the speedpot CW. Watch for erratic rotation or
excessive source current. If either occurs, immediately return the
speedpot fully CCW, and turn off the power.
3. Try another phase combination of P1 Φ1, Φ2 and Φ3.
There are six (6) combinations for connecting the three phase
motor leads to P1 Φ1, Φ2 and Φ3.
4. Apply power and test again. One combination will work. The correct
combination will allow smooth rotation of the motor, and the lowest
current draw from the AC source.
5. Remove AC power.
6. Remove the Variac.
7. Connect normal AC input voltage at P1–AC and AC terminals.
8. Apply power and check for proper motor operation.