Motortronics
8
3.0 - Operation
1. Apply line
voltage to the system. The “Power On” LED on the MWH should light. If the “Power On” LED does not
light, it is an indication of a blown fuse or improper connections. Do not proceed until this is corrected.
2. If the motor starter is off and the “SW” circuit is closed, then the “Enable On” LED will be on. The MWH will turn on
automatically in approximately 1 minute.
3. The “Output On” LED will turn on when the MWH begins to apply voltage to the motor.
4. The output voltage to the motor is factory set for 8% to 9% of the line voltage. (Measured with an RMS AC
Voltmeter) Maximum range of this adjustment is approximately 15% of line voltage.
Note:
Caution must be used when adjusting the output. Too high a setting may cause excessive heating in the motor.
5. During initial start-up monitor the output current to the motor. Use a DC clamp-on ammeter. Output current must not
exceed the rating of the motor winding heater unit.
6. When the motor is starting the MWH automatically shuts off. It will remain off until the motor is turned off. The MWH
will then turn on after approximately1 minute.
LED Placement
