Hypertherm Powermax30 AIR Service Manual - Manual (Page 85)

Powermax30 AIR Service Manual 808850 85
5 – Troubleshooting and System Tests
Test 5 – torch stuck open or torch stuck closed
If the nozzle and electrode are not in contact before the torch trigger is pulled, the power supply detects a “torch stuck
open” fault. If the nozzle and electrode remain in contact after the torch trigger is pulled, the power supply detects a
“torch stuck closed” fault.
Use the following test to determine if the torch is stuck in either position.
1. Set the power switch to OFF (O), and disconnect the power cord from the power source.
2. Remove the power supply handle and cover. See Remove the power supply cover on page 98.
3. Remove the component barrier. See Remove the component barrier on page 100.
4. Measure the resistance between the torch lead’s white wire group and red wire . The resistance should read
very low, a closed circuit.
 If the resistance reads as open with the power OFF, the nozzle and electrode are not in contact, or one of the
wires in the lead is broken. Make sure that the torch plunger moves freely in the torch head.
Figure 15
 The front panel is hidden in this figure to better show the torch lead and wires.
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