How To Test Motor And Direction Of Rotation - Danfoss VLT Instruction Manual

4 Electrical installation

4.1.23 How to Test Motor and Direction of Rotation.

Note that unintended motor start can occur; make sure no personnel or equipment is in danger!
Please follow these steps to test the motor connection and direction of rotation. Start with no power to the unit.
4
Figure 4.37:
Step 1: First, remove the insulation on both ends of a 1.97–
2.76 in [50–70 mm] piece of wire.
Figure 4.38:
Step 2: Insert one end in terminal 27 using a suitable ter-
minal screwdriver. (Note: For units with the Safe Stop func-
tion, the existing jumper between terminal 12 and 37 should
not be removed for the unit to be able to run!)
Figure 4.39:
Step 3: Insert the other end in terminal 12 or 13. (Note:
For units with the Safe Stop function, the existing jumper
between terminal 12 and 37 should not be removed for the
unit to be able to run!)
4-24
Figure 4.40:
Step 4: Power up the unit and press the [Off] button. In
this state, the motor should not rotate. Press [Off] to stop
the motor at any time. Note that the LED on the [OFF] but-
ton should be lit. If alarms or warnings are flashing, please
see chapter 7 for more information.
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VLT ® HVAC Drive Instruction Manual