
ENG
17
4. Maintenance
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 troubles-
hooting techniques.
A. The cutting torch fail to ignite the arc, when pressed on the torch
switch (B1).
Gas pressure too low, adjust gas pressure to 65psi/3,5bar.
B. The cutting torch fail to ignite the arc, when press on the torch switch
(B1), air feed intermittently.
The electrode (B3) or nozzle (B5) is installed wrong, turn off the power source,
install the electrode (B3) or nozzle (B5), and screw ceramic shield cup (B6)
down properly, then turn on the power source.
C. The cutting torch fail to ignite the arc, when press on the torch switch
(B1), air feed intermittently.
Short-circuit for burned-out and other abnormal situation, turn off the power
source, change the electrode (B3) and nozzle (B5).
D. Electric control light (A1) and overheating light (A3) is on.
1. Air flow blocked, check for blocked air flow around the unit and correct
condition.
2. Fan blocked, check and correct condition.
3. Unit is overheated, let unit cool down for at least 5 minutes. Make sure
the unit has not been operated beyond Duty Cycle limit, See chapter 7.
4. Input voltage over the normal range, choose the proper voltage , See
chapter 7.
5. Faulty components in unit, return for repair or have qualified technician
repair per Service Manual.
E. Torch fail to ignite the arc when torch switch (B1) is activated
1. Faulty torch parts, inspect torch parts and replace if necessary.
2. Compressed air or argon gas pressure too high or too low, adjust to pro-
per pressure (A7).
3. Faulty components in unit, return for repair or have qualified technician
repair per Service Manual.
F. No cutting output; Torch activated, power source on ; Gas flows; Fan
operates
1. Torch not properly connected to power supply, check that torch leads are
properly connected to power supply (A4) (A5).
2. Earth clamp not connected to work piece, or connection is poor, make
sure that work cable has a proper connection to a clean, dry area of the
workpiece
3. Faulty components in unit, return for repair or have qualified technician
repair per Service Manual