Hypertherm Powermax105 Service Manual - Manual (Page 175)

TroubleshooTing and sysTem TesTs
powermax
105 Service Manual 8-37
Problem Meaning Causes Solution
The power ON LED is
illuminated and no fault
codes are displayed, but
no gas flows when the
torch trigger is pulled.
The start signal is
not reaching the
control board.
• The torch or
torch lead may
be damaged.
• The power board
may be faulty.
• The control
board may be
faulty.
• Inspect the torch and torch lead for
damage.
• Verify that the start icon appears on the
LCD screen when the trigger is pulled. If
it does not, perform Test 7 to check the
start signal from the power board.
Power ON LED blinks or
goes out while cutting.
A power component
is shorted.
• Faulty fan. • Perform Test 11.
• Faulty power
board or IGBT.
• Perform Tests 1, 2, or 3.
• Faulty DSP
board.
The arc does not transfer
to the workpiece.
• Clean the area where the work clamp
contacts the workpiece to ensure a
good metal-to-metal connection.
• Inspect the work 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.
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.