Hypertherm Powermax45 Mode D'emploi page 6

Powermax45 Power Switch Replacement Kit
Replace the power switch (400 V CE and 480 V CSA)
Before beginning this procedure, make sure you have the correct power switch for your system. The replacement kit
number for a 400 V CE or 480 V CSA power switch is 228288. The procedure below applies to the 400 V CE and
480 V CSA systems.
1. Turn OFF the power, disconnect the power cord, and disconnect the gas supply.
2. Use a #2 Phillips screwdriver to remove the 2 screws from the handle on the top of the power supply. Tip the end
panels back slightly so that you can get the edges of the handle out from underneath them. Lift the cover off the
power supply. Remove the Mylar barrier that protects the power board.
Static electricity can damage circuit boards. Use proper precautions when handling printed circuit
boards.
– Store PC boards in anti-static containers.
– Wear a grounded wrist strap when handling PC boards.
3. Remove the screw holding the rotary switch, then remove the rotary switch and inner plastic grommet. Remove the
4 screws attaching the power switch to the power supply.
4. Gently tilt the rear end panel away from the power supply.
5. Remove the power switch from the power supply by pulling it gently up and out to the side.
6. Loosen the 3 screws that secure the power cord wires to the power switch and gently pull the wires out of the
switch.

The wires for 400 V CE power cords are brown, black, and gray.
 The wires for 480 V CSA power cords are black, white, and red.
7. Loosen the 3 screws that secure the 3 white wires to the power switch and gently pull the wires out of the switch.
8. Install the new power switch in the reverse order of removal. Tighten the screws that were supplied with the kit
(075845) to 11.5 kg cm (10 inch-pounds).
4
All manuals and user guides at all-guides.com
CAUTION!
Remove these 4 screws.
Powermax45 Field Service Bulletin 805880 Revision 3
Remove the rotary
switch screw.