Chapter 10
181
UM10350_PCNC770_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 Controller will not power on
Table 1.2a Coolant pump will not run when coolant switch is in the on position
Table 1.2b Coolant pump will not run when coolant switch is in the auto position
Power Distribution Checklist
Table 1.1
Controller will not power on
Possible Cause Probability
Action to Identify Cause of Problem
Discussion
Controller switch
(SW6) on Operator
Panel turned off
High Check the switch Turn it on if required
Main Disconnect in
off position
Medium Check the switch Turn it on if required
Breaker turned
off in wall panel
supplying PCNC
tripped
Medium Check the breaker
Turn it on and/or reset if
required
Controller not
plugged into
outlet
Medium Check the plug Plug it in if required
Fuse in FU6
cabinet is blown
Low Check fuse Replace as needed
Figure 10.4
Main
Disconnect