Hypertherm Powermax30 Service Manual - Manual (Page 67)

MAINTENANCE
3-28
powermax30
Service Manual
Single phase
CE unit
L Brown
N Blue
PE Green/yellow
L
Brown wire
N
Blue wire
8. Pull the wires through the strain relief or through the hole in the endcap to remove the old power cord.
9. If you have a new strain relief, slide it onto the new power cord and route the wires for the new power cord
through the hole in the endcap. If the old strain relief is still in place, route the wires through the strain relief.
10. Slide the strain relief’s nut over the wires and screw it to the strain relief from the inside of the endcap.
11. Press the connector for the black wire onto the pin on the upper left side of the power switch.
12. Press the connector for the white wire onto the pin on the upper right side of the power switch.
13. Tighten the green ground wire to the heatsink with a torque setting of 15 inch-pounds (17.28 kg cm).
14. Position the wires in the wire chase up the side of the endcap and out of the way of the power board. Once the
wires are in place, tighten the strain relief’s retention nut.
15. Replace or reposition the endcap. Make sure that the screw hole in the ground clip aligns with the screw holes
in the endcap and the power supply.
16. Being careful not to pinch any of the wires, replace the Nomex barrier and slide the cover back onto the power
supply. Make sure that the bottom edges are in the tracks. Position the handle over the holes in the top of the
cover, then use the 2 screws to secure the cover.
17. Reconnect the electrical power and the gas supply.
Replace the power cord (CE)
1. Turn OFF the power, disconnect the power cord, and disconnect the gas supply.
2. Remove the 2 screws from the handle on the top of the power supply. Remove the handle and then lift the
cover off the power supply. Remove the Nomex barrier that protects the power board.
The power cord has a brown wire and a blue wire that connect to the power switch and a green/yellow ground
wire that connects to the heatsink.
3. Remove the rear endcap or gently tilt it away from the power supply.
4. Carefully pull the connector for the blue wire away from the power switch to disconnect it. You can use
needlenose pliers or a straight screwdriver to ease it off, if necessary.
5. Remove the brown wire the same way.