Hypertherm Powermax 30 Service Manual page 49

MAINTENANCE
Troubleshooting guide (continued)
Problem
The power ON LED and
the torch cap LED
illuminate.
AC AC
The power ON LED
illuminates and the torch
cap LED flashes.
AC AC
The gas pressure and
temperature LEDs flash
when the machine is
powered ON.
All four LEDs flash when
the system is powered on.
The power ON LED
illuminates and no fault
LEDs illuminate, but no
gas flows when the torch
trigger is pulled.
AC AC
3-10
This may mean
The cap-sensing circuit is
not satisfied.
The consumables are
stuck in an open or closed
position, or the nozzle and
electrode are not touching
when the torch's trigger is
pulled.
The system was powered
on while the plasma start
signal was being sent.
A major fault has occurred
in the power supply.
AC AC
The start signal is not
reaching the control
board.
Cause
• The consumables are
loose, improperly
installed, or missing.
• The cap sensor switch
is faulty.
• The consumables are
installed incorrectly, or
they are worn.
• The torch plunger is
stuck.
• The torch or lead has a
broken wire.
• The system was
powered on while the
torch trigger was being
pulled.
• The start circuit is stuck
closed.
• Any of the fan, solenoid
valve, control board, or
power board may be
faulty.
• The torch or torch lead
may be damaged.
• The power board may
be faulty.
• The control board may
be faulty.
powermax30
Solution
• Correctly install the
consumables.
• Perform test 7 to test
the cap sensor switch.
• Check the consumables
for wear and replace if
necessary. Make sure
that they are properly
installed.
• Perform test 5 and
replace the torch head
if necessary.
• Release the torch
trigger and turn OFF the
power supply and then
turn it ON again to reset
the unit.
• Perform test 6 to test
the start signal.
• The error LED on the
control board should be
flashing. The number of
times it flashes between
pauses indicates which
components to test. See
Control board LEDs in
this section.
• Inspect the torch and
torch lead for damage.
• Verify that the control
board start LED
illuminates when the
trigger is pulled. If it
does not, perform test 6
to check the start signal
from the power board.
Service Manual