The CL trimpot is factory set for 160% of Jumper J3 range setting. For a higher current limit setting, rotate the CL trimpot clockwise. For a lower current limit setting, rotate the CL trimpot counterclockwise. The current limit also contains I2t trip function. The control will trip according to a predetermined current vs. time function. The trip curve is directly related to the CL set point and can be changed with the CL trimpot. See Figure 23 on page 11.
CAUTION! Adjusting the CL above 160% of the motor rating may cause overheating of the motor. Do not leave the motor in a locked rotor condition for more than a few sec- onds since motor damage may occur.
G.Boost (BOOST) – Sets the amount of boost voltage to the motor. Jumper J7 is factory set to the "FIX" position, which provides a predefined amount of boost voltage for 50 Hz and
60Hz motors. To adjust the amount of boost voltage to the motor, set Jumper J7 to the "ADJ" position. The amount of boost voltage may be adjusted by the BOOST trimpot as described below. See Figure 24.
1.Connect an analog AC ammeter in series with one of the motor leads.
Note: Generally, digital or
FIGURE 24
BOOST TRIMPOT RANGE
| 16 |
9 | 23 |
5 |
|
0 | 35 |
Volts
(Shown Factory Set to 5 Volts)
2.Run the motor unloaded at approximately 4 Hz (or 120 RPM).
Note: An unloaded motor with excessive boost will draw more current than a partial- ly loaded motor.
3.Adjust the BOOST trimpot until the ammeter reading reaches the motor nameplate rating.
4.Using the Main Speed Potentiometer, slowly adjust the motor speed over a 0 - 15 Hz (0 - 450 RPM) range. If the motor current exceeds the nameplate rating, lower the boost setting.
WARNING! TO AVOID MOTOR WINDING OVERHEATING AND FAILURE, DO NOT OVERBOOST THE MOTOR.
TABLE 5 – CONTROL MODE AND STATUS LED INDICATION
Control Mode |
| Status LED Information | ||
Flash Rate | Color Sequence |
| Illumination Duration Seconds | |
|
| |||
Run | Slow Flash | Green | 1 | Sec On - 1 Sec Off |
|
|
|
| |
Stop | Steady | Yellow | Constant | |
|
|
|
|
|
Slow Flash | Yellow | 1 | Sec On - 1 Sec Off | |
|
|
|
|
|
Short Circuit | Slow Flash | Red | 1 | Sec On - 1 Sec Off |
|
|
|
| |
I2t Fault | Quick Flash | Red | 0.25 Sec On - 0.25 Sec Off | |
|
|
|
| |
Overload | Steady | Red | Constant | |
|
|
|
| |
Undervoltage | Quick Flash | Red - Yellow | 0.25 Sec Red - 0.25 Sec Yellow | |
|
|
|
|
|
Overvoltage | Slow Flash | Red - Yellow | 1 | Sec Red - 1 Sec Yellow |
|
|
|
| |
Recovered Undervoltage2 | Quick Flash | Red - Yellow - Off - Green - Off | 0.25 Sec Red - 0.25 Sec Yellow - | |
|
|
| 0.5 Sec Off - 1 Sec Green - 0.5 Sec Off | |
|
|
|
|
|
Recovered Overvoltage2 | Slow Flash | Red - Yellow - Off - Green - Off | 1 | Sec Red - 1 Sec Yellow - 0.5 Sec Off - |
|
|
| 1 | Sec Green - 0.5 Sec Off |
|
|
|
|
|
Notes: 1. Only if the
2. Only if the control is in Manual Reset Mode (Jumper J4 set to the “MAN” position).
12
