73
Normally, the Brush Up Error occurs when Input 004 fails to receive a signal within 3.5
seconds of the motor starting. Below is a list of the possible causes that can produce a
BRUSH UP ERROR.
If the Brush Lift Motor does not run, menu to the I/O TEST then OUTPUT TEST and press
BRUSH LIFT to check relay operation and voltages.
1.
Problem
:
Brush Lift motor does not run when tested in the Output Test. You will need to determine
if power is getting to the motor.
Possible Cause
:
Fuse is blown or fuse holder is bad.
Brush bearings are causing a bind not allowing free movement up and down.
Relay came loose in socket or has failed.
Faulty motor.
Bad connection to motor, check all power wiring to motor.
PLC output 10CH 05 failed.
Problem
:
The Brush Lift motor runs but the up switch failed to operate and send the signal to PLC
Input 004.
Possible Cause
:
Check and inspect microswitch, manually operate switch to see if Input 004 will
illuminate.
Possible broken wire or loose connection at either the yellow 24VDC, or the
Green/White Wire that connects to Input 004.
This error can also happen if the brush down Input 005 is stuck on.
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