Hypertherm Powermax125 Service Manua - Manual (Page 144)

144 Powermax125 Service Manual 808070
8 – Troubleshooting and System Tests
Power ON LED
blinks or goes out
while cutting. A power component is
shorted. • Faulty fan. • Perform Test 11 – Fan on page 164.
• Faulty power board
or IGBT.
• Perform Test 1 – Voltage input on
page 150, Test 2 – DC power bus on
page 152, or Test 3 – Output diodes
on page 154. • Faulty DSP board.
The arc does not
transfer to the
workpiece. Poor continuity exists
between the work lead and
the workpiece. • The workpiece is
dirty.
• The ground clamp is
damaged.
• The pierce height
distance is too large.
• Clean the area where the ground
clamp contacts the workpiece to
allow a good metal-to-metal
connection.
• Inspect the ground clamp for damage,
and repair as necessary.
• The pierce height distance may be too
large. Move the torch closer to the
workpiece and fire the torch again.
Gas flows from
the torch at
power-up when
neither the torch
trigger nor a
remote start is
activated. The electronic regulator,
power board, or control
board is faulty. • Faulty electronic
regulator.
• Faulty power board.
• Faulty DSP board.
• Perform Test 9 – Electronic regulator
on page 162.
The incoming gas pressure is
too high. • The gas pressure
from the compressor
or cylinder may be
too high.
• Check the gas supply to make sure
that it does not exceed 9.3 bar
(135 psi). If necessary, reduce the
pressure.
Problem Meaning Causes Solution