Basic Troubleshooting Guide - ESAB Cutmaster 40 Operating Manual

ESAB CUTMASTER 40
A. Every three months
Check external air filter, replace if necessary.
1. Shut off input power; turn off the gas supply.
Bleed down the gas supply. Check air filter and
replace if necessary.
NOTE!
Leave internal ground wire in place.
B. Every six months
1. Check the in-line air filter(s), clean or replace as
required.
2. Check cables and hoses for leaks or cracks,
replace if necessary.
3. Check all contactor points for severe arcing or
pits, replace if necessary.
4. Vacuum dust and dirt out of the entire machine.

5.02 Basic Troubleshooting Guide

WARNING
There are extremely dangerous
voltage and power levels present
inside this unit. Do not attempt to
diagnose or repair unless you have
had training in power electronics
measurement and troubleshooting
techniques.
Common Faults symptom LED Indicators
A. AC indicator OFF
1. Main input power cord does not connect to
power distribution net.
a. Connect the power cord.
2. Power ON/OFF switch in OFF (down) posi-
tion.
a. Turn switch to ON (up) position.
3. Actual input voltage does not correspond to
voltage of unit.
a. Verify that the input line voltage is cor-
rect.
4. Faulty components in unit
a. Return for repair or have qualified
technician repair per service manual.
SERVICE
B. AC indicator blinking
1. Indicator blinking (1 sec ON/1 Sec OFF,
Gas may also pulse 3 times).
a. Check for missing torch parts or not
properly installed. Turn ON/OFF switch
to OFF position and restart the machine
by turning the power switch to ON.
2. Indicator blinking (1 sec ON/3 Sec OFF).
a. Check for worn or sticking torch
parts. Replace if necessary.
3. Indicator blinking (3 sec ON/3 Sec OFF).
a. Torch switch was depressed before
machine was completely powered up.
Turn ON/OFF switch to OFF position
and the restart the machine by turning
the power switch to ON.
C. Air indicator OFF
1. Gas pressure too low. Check supply pres-
sure.
D. TEMP indicator ON, (AC indicator ON)
1. Unit air flow obstructed.
a. Check for blocked air flow around the
unit and correct condition.
2. Fan blocked.
a. Check for blocked status and correct
condition.
3. Unit is overheated.
a. Keep the machine plugged in and
turned on for five minutes. This will allow
the fan to run and cool the machine.
4. Faulty components in unit.
a. Return for repair or have qualified
technician repair per service manual.
E. Torch will not pilot, when torch trigger is
activated.
1. Faulty parts in torch.
a. Check torch parts per section 4.02;
replace as needed.
2. Gas pressure too low.
5-2 300X5394