Hypertherm Powermax 85

TROUBLESHOOTING AND SYSTEM TESTS
powermax 65/85 Service Manual 5-31
Fault
code
Description
(System test number)
Power
LED
Fault
LED
Fault
icon
Solutions
3-51-1 Inverter saturation fault (the
inverter is over current)
On On
Upper and lower inverter IGBTs are gating
(being activated) in phase rather than 180°
out of phase.
• Test the two inverter IGBTs in the module.
• Replace the module if either is faulty.
• If necessary, replace the power board.
3-52-0 Shoot through
3-60-0 Power board The DSP does not recognize the power
board. The code is for future machines where
the current DSP board will not work with
future power boards.
3-70-0 Internal serial communications
fault
There is a fault with the communication
between the DSP and Power board.
• Check the board connector.
• If necessary, replace either the DSP or
Power board.