Hypertherm Powermax105 Service Manual - Manual (Page 172)

TroubleshooTing and sysTem TesTs
8-34
powermax
105 Service Manual
Fault
code
Description Power
lED
Fault
lED
Fault
icon
Solutions
3-41-0 Drive fault
On On
If an activation signal is sent to a device and
the device does not activate (machine motion
relay or in-rush relay for example) this fault will
occur.
3-42-0 5 or 24 VDC fault The 5 or 24 VDC supply from the flyback
circuit is out of range.
Perform Test 5.
3-42-1 18 VDC fault The 18 VDC supply from the flyback circuit is
out of range.
• Replace the power board.
• Check the inverter IGBT module and
replace if necessary.
3-43-0 Inverter capacitors
unbalanced
Voltage across one or both inverter caps is
more than 25% different than nominal.
• CSA and 230-400 V CE units have a 760
VDC bus voltage.
• Nominal is 380 VDC for each cap.
• Fault condition: < 275 or > 485 VDC
across either capacitor.
• CE units at 400 VAC have a 560 VDC bus
voltage.
• Nominal is 280 VDC for each cap.
• Fault condition: <200 or> 360 VDC across
either capacitor.
• Test the IGBT module.
• Replace the bulk capacitors.
3-44-1 PFC over current High current in the PFC/Boost circuit.
• Test the PFC IGBT module.
• Replace it if faulty.
• If necessary, replace the power board.