Hypertherm Powermax 85 Service Manual

TroubleshooTing and sysTem TesTs
powermax 65/85 Service Manual 5-37
Problem Meaning Causes Solution
Machine does not cut
well (does not appear to
be cutting at full cutting
power) and the arc does
not time out after 5
seconds.
Inadequate ground.
• Poor work lead
connection.
• Verify that the work lead is attached to
the workpiece and the workpiece is free
of rust, paint, or other coatings.
• Damaged work
lead.
• Check the resistance across the work
lead. If the resistance is greater than 3
Ω, repair or replace the work lead.
• Faulty pilot arc
IGBT.
• Turn the power OFF, remove the
consumables, and check the resistance
between the cathode and the work
piece. If the resistance is less than 5kΩ,
check the resistance across the pilot
arc IGBT (two screws on 08). If the
resistance is less than 5kΩ, replace the
pilot arc IGBT.
• Faulty control
board.
• Replace the control board.
Low output from the
power supply.
• Current is set too
low.
• Increase the current as needed.

Hypertherm Powermax 85 Specifications

General

Gas Supply	Clean, dry, oil-free air or nitrogen
Cooling Method	Fan-cooled
Input Voltage	200-600V, 3-phase
Current Output	25-85 A
Duty Cycle	60% @ 85 A
Recommended Gas Inlet Flow Rate/Pressure	6.7 scfm @ 85 psi
Cutting Capacity (Recommended)	1" (25 mm)
Gas Type	Air/Nitrogen