Hypertherm Powermax30 AIR Service Manual - Manual (Page 72)

72 Powermax30 AIR Service Manual 808850
5 – Troubleshooting and System Tests
Figure 4
During normal operation, the power-ON LED on the front of the power supply and the Start and Transfer LEDs on the
control board illuminate. When a problem occurs with the system, one or more of the fault LEDs on the front of the power
supply and the Error LED or the Reset LED on the control board may illuminate or blink.
Use the control board Rest and Error LEDs to troubleshoot
The Reset and Error LEDs provide information to use when troubleshooting a system failure. If the LEDs on the front of
the power supply are blinking, count the number of times the Error LED blinks. Then, look at
Table 5 on page 73 to
determine the corrective action.
Reset LED
When the control board’s Reset LED illuminates, the voltages on the power board may be incorrect. Perform the following
tests at J7 on the power board. See
Test 2 – power board voltage checks on page 80.
 Test pin 5 to ground for 3.3 VDC (±10%).
 Test pin 7 to ground for 5 VDC (±10%).
 Test pin 12 to ground for 2.2 VDC (±10%).
If the values you find are not within ±10% of the three values listed above, detach the control board’s ribbon cable and
perform the tests again. If you find the correct values the second time, replace the control board. Otherwise, replace the
power board. See
Replace the control board on page 118 or Replace the power board on page 126.
1 2 3 4
5
1 Reset
2 Error
3 Transfer (XFR)
4 Start
5 Ribbon cable