beautypg.com

Powermax – Hypertherm Powermax45 Service Manual User Manual

Page 90

background image

TroubleshooTing and sysTem TesTs

5-14

powermax

45

Service Manual

Problem

This may mean

Cause

Solution

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,

or the pilot arc starts but

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 or too high, the air

quality may be poor, 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

high or too low or the gas

supply is restricted.

• The gas filter element is

dirty.

• The power board is faulty.

• Inspect the consumables,

torch, and lead. Replace

any damaged parts.

• Verify that the gas supply

is providing at least

4.5 bar (65 psi) and

does not exceed 9.3 bar

(135 psi).

• Repair any restrictions in

the supply line.

• Replace the gas filter

element if dirty.

Perform Test 3 – VBUS

and voltage balance on

page 5-20 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.

• The material being cut

may require the use of

continuous pilot arc mode.

• If you are cutting

expanded metal, grate,

or any metal with holes,

set the mode switch to

continuous pilot arc mode.

• 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.

The cut quality is poor

or the cut does not sever

the metal.

The consumables are worn,

there is a poor work lead

connection, the output from

the power supply is too

low, or the power board is

producing low current.

• The consumables need to

be replaced.

• The work lead may be

damaged or not properly

connected to the work

piece.

• The amps adjustment

knob may be set too low.

• The power board may be

faulty.

• Inspect the consumables

and replace if necessary.

• Inspect the work lead for

damage. Reposition it and

clean the work surface to

ensure good contact.

• Check the amps

adjustment knob setting. If

your input circuit is 200 V,

34 A; 240 V, 28 A; 400 V,

10 A; or 480 V, 8.5 A, turn

the knob to the highest

setting.

This manual is related to the following products: