Hypertherm XPR170 - Replace the Pilot Arc Relay

Plasma Power Supply
1
48 810410 Field Service Bulletin XPR170
Replace the pilot arc relay

Refer to Control side – view 2 on page 139 for location and part number.
1. Complete the following procedures:
a. Remove the power from the cutting system.
b. Refer to Remove the left-side (control-side) panel on page 63.

Keep all nuts and screws that you remove.
2. Remove the cover.
3. Remove the screw from the positive
(+) and negative (-) wires.
4. Remove the screw from wire 21 and
wire 22.
5. Remove the pilot arc relay.
6. Align the new pilot arc relay.
7. Use the 2 screws in the middle to
install wire 21 and wire 22 as shown.
Tighten the screws to 1 N∙m (10 in∙lbf).
8. Use the 2 screws on the top to install
the + and - wires as shown. Tighten
the screws to 1 N∙m (10 in∙lbf).
9. Install the cover.
10. Install the control-side panel.
(+)
21
(-)
22