Refer to Line-disconnect switch requirements on page 45.
3. Examine each PCB.
4. Use a licensed electrician to measure the line voltage between the terminals that are inside of the
plasma power supply.
For many troubleshooting procedures it is necessary to remove the power from the cutting system. To
do this safely, use the following procedure. Even if you use the remote on-off switch to set the power to
OFF, electricity stays inside the cutting system. You can still get a serious electric shock when the cutting
system is connected to an electric power source.
Before you remove the power from the cutting system, it can be helpful
to move the torch to the edge of the cutting table and then move the
torch lifter to its highest point. This gives easier access to the torch and
consumable parts.
Remove the power from the cutting system
1. Set the line-disconnect switch to the OFF position.
2. If the cutting system is not hard wired, disconnect the main power cord from the electric power.
If the cutting system is hard wired, you cannot disconnect the main power cord from the electric
power.
Even if you remove the power from the cutting system, you can still get a serious electric shock if the
plasma power supply stays connected to an electric power source. Use extreme care during service
and maintenance when the cutting system is connected to electricity.
3. Make sure that the power-indicator LED is not illuminated on the plasma power supply, gas connect
console, or TorchConnect console.
Examine each PCB
1. Remove the power from the cutting system.
2. Remove the external panel or panels from the system component that has the PCB that you want to
examine.
Refer to PCB names and locations on page 277.
3. Examine the PCB for:
□
Loose or disconnected PCB connectors
□
Loose or disconnected PCB assemblies
Diagnostics and Troubleshooting
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811530 Instruction Manual XPR460
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