Chapter 10
181
UM10349_PCNC1100_Manual_0916A
Troubleshooting
10.5.1 Power Distribution Subsystem
10.5.1.1 Overview
Operator supplied electrical power is run through the Main
Disconnect on the mill (see Figure 10.4). This switch controls
all power to the mill and the controller.
Below is the Problem Resoluon Checklist secon. For more
in depth explanaon of this subsystem, refer to the details
secon that follows.
Contents of Power Distribution Subsystem Problem Resolution Checklist
Table 1.1 GFI in customer supply for power for the controller and coolant pump trips
Table 1.2 Controller will not power on
Table 1.3a Coolant pump will not run when coolant switch is in the on position
Table 1.3b Coolant pump will not run when coolant switch is in the auto position
Power Distribution Subsystem Checklist
Table 1.1
GFI in customer supply for power for the controller and coolant pump trips
Possible Cause Probability
Action to Identify Cause of Problem
Discussion
GFI circuit
defective
High
Test a device such as a drill or other
portable tool on the circuit.
If the tool works, the circuit is
likely OK.
Loose wires in
circuit
Medium
Power off the mill following the
power off/on procedure detailed in
chapter 3, Installation, and test for
loose wires.
Use the two nger tug test. Refer
to Frequently Found Problems.
Defective control
board
Low
Power off the mill following the
power off/on procedure detailed in
chapter 3, Installation.
You can also unplug the power
cord for the mill.
Remove wires 202 and 205 from
the control board. Tape each wire
individually so it cannot short out, and
power the mill on following power
off/on procedure detailed in chapter
3, Installation..
If the problem disappears, a control
board problem is indicated. You
can run the mill by controlling the
coolant pump in manual until your
are able to replace the control board.
Figure 10.4
Main
Disconnect
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