Do System Tests to Identify Defective Components
100 810430 Troubleshooting Guide Powermax65/85/105 SYNC
Figure 20 – Powermax65/85 SYNC
Figure 21 – Powermax105 SYNC
Measure the resistance with the power OFF
1. Set the power switch on the plasma power supply to OFF (O), and disconnect the power cord.
2. Measure the resistance again between the pilot arc IGBT and J28 (or J29). Is the resistance
less than 100 ohms ()?
If yes, continue with the next step.
If no, continue with step 5.
3. Disconnect the torch from the plasma power supply.
WORK
LEAD
J26 (J27)
J28 (J29)
WORK
LEAD
J26 (J27)
J28 (J29)
System at idle Gas is flowing
<5Ω >10kΩ
1 1
2 2
System at idle Gas is flowing
<5Ω
>10kΩ
1
1
2 2