Powermax30, Troubleshooting guide (continued) – Hypertherm Powermax30 Service Manual User Manual

Page 50

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MAINTENANCE

powermax30

Service Manual

3-11

Problem

This may mean

Cause

Solution

Gas flows when the
system is powered ON.

The incoming gas
pressure is too high.

• The gas pressure from

the compressor or
cylinder may be too
high.

• The gas solenoid valve

may be faulty.

• Check the gas supply to

make sure that it does not
exceed 135 psi (9.3 bar).
If necessary, reduce the
pressure.

• Perform test 4 to verify

that the gas solenoid
valve is functioning
correctly.

When pulling the torch’s
trigger, gas flows from the
torch, but the torch does
not fire or fires only for a
short period of time.

The consumables, torch,
or torch lead are not
functioning correctly, the
gas pressure may be too
low, or there is a voltage
imbalance on the power
board.

• The consumables may

be worn or damaged.

• The torch or torch lead

may be damaged.

• The gas pressure is too

low or the gas supply is
restricted.

• The power board is

faulty.

• Inspect the consumables,

torch, and lead. Replace
any damaged parts.

• Verify that the gas supply

is providing at least 65 psi
(4.5 bar). Repair any
restrictions in the supply
line.

• Perform test 3 to test the

voltage balance on the
power board.

Arc goes out while
cutting or intermittently
will not fire.

The arc lost contact with
the workpiece.

• The work lead or work

lead connection may be
faulty.

• Check for loose

connections at the work
clamp and at the power
supply.

• Reposition the work lead

on the workpiece.

• Clean the cutting surface

to ensure a better
connection with the work
lead.

When pulling the torch’s
trigger, the pilot arc starts
but then extinguishes
before the normal
5-second time-out period.

The consumables, torch,
or torch lead are not
functioning correctly, the
gas pressure may be too
low, the air quality may
be poor, or there is a
voltage imbalance on
the power board.