Troubleshooting
6-7
Part 1108061-02
E 2015 Nordson Corporation
Reversing Motor Direction
Improperly connecting the exhaust fan motor starter will cause it to rotate in
the wrong direction. If the exhaust fan is rotating in the wrong direction, air
will not be drawn through the recovery system and the sprayed powder will
not be contained within the enclosure. Use the following procedure to
check and correct fan rotation.
1. Turn on power at the system and afterfilter control panels.
2. Start and immediately stop the afterfilter fan motor.
3. While the fan is coasting to a stop, observe the direction of fan rotation.
The fan should rotate in the direction indicated by the yellow arrow on
the fan drive housing. If the rotation is backward, go to the next step.
WARNING: Even with the disconnect switch in the off position, the
terminals at the top of the switch are still live. Do not touch them. Failure to
observe this warning could result in serious injury or death.
4. Shut off power at the disconnect switch on the system and afterfilter
control panels. Open the afterfilter control panel door and reverse any
two wires (L1, L2, or L3) connected to the live side of the fan motor
circuit breaker (CB1). Close the panel door.
5. Turn the disconnect switches to the on position. Start the fan and check
the rotation direction.
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