Hypertherm Powermax65 Service Manual Rev.1 - Manual (Page 159)

TroubleshooTing and sysTem TesTs
powermax
65/85 Service Manual 5-33
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 (PCB3) or
IGBT.
• Perform Tests 1, 2, or 3.
• Faulty control
board (PCB1).
The arc does not transfer
to the workpiece.
Poor continuity
exists between the
work lead and the
workpiece.
• The workpiece is
dirty.
• The work clamp
is damaged.
• The pierce height
distance is too
large.
• The transfer
current sensor is
bad.
• 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.
• If the pierce height distance is too large,
move the torch closer to the workpiece
and fire the torch again.
• If the transfer current sensor is bad,
replace the power board.
Gas flows from the
torch at power-up when
neither the torch trigger
nor a remote start is
activated.
The electronic
regulator, power
board (PCB3),
or control board
(PCB1) is faulty.
• Faulty electronic
regulator.
• Faulty power
board (PCB3).
• Faulty control
board (PCB1).
• 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 135 psi (9.3 bar). If
necessary, reduce the pressure.