Tweco Maximizer 300 Torch for BNFL - Manual (Page 35)

Manual 0-2990 5-5 SERVICE
B. No cutting output
1. Torch not properly connected to power supply
a. Check that torch leads are properly attached
to power supply and work cable is attached to
workpiece
2. Faulty components in torch and leads assembly
a. Inspect torch assemblies and replace if neces-
sary. Refer to Section 5.07, Torch and Leads
Troubleshooting.
3. Faulty components in power supply system components
a. Return for repair or have qualified technician
repair per Service Manual.
C. Low cutting output with no control
1. Incorrect setting of AMPERAGE control on power sup-
ply
a. Check and adjust to proper setting.
2. Torch tip contacting workpiece
a. Increase standoff distance
3. Faulty components in torch and leads assembly
a. Inspect torch assemblies and replace if neces-
sary. Refer to Section 5.07, Torch and Leads
Troubleshooting.
4. Faulty components in power supply system components
a. Return for repair or have qualified technician
repair per Service Manual.
D. Limited output with no control
1. Poor input or output connections to power supply
a. Check all input and output connections.
2. Incorrect setting of AMPERAGE control on power sup-
ply
a. Check and adjust to proper setting.
3. Faulty components in torch and leads assembly
a. Inspect torch assemblies and replace if neces-
sary. Refer to Section 5.07, Torch and Leads
Troubleshooting.
4. Faulty components in power supply system components
a. Return for repair or have qualified technician
repair per Service Manual.
E. Erratic or improper cutting output
1. Poor input or output connections to power supply
a. Check all input and output connections.
2. Current set too low at power supply
a. Increase current setting.
3. Torch is being moved too fast across workpiece
a. Reduce cutting speed (refer to Appendix 2, Cut-
ting Speed Charts).
4. Excessive oil or moisture in torch
a. Hold torch 1/8 inch (3 mm) from clean surface
while purging and observe oil or moisture
buildup (do not activate torch)
F. No gas flow
1. Gas not connected or pressure too low
a. Check source for at least 90 psi (6.2 bar).
2. Faulty components in torch and leads assembly
a. Inspect torch assemblies and replace if neces-
sary. Refer to Section 5.07, Torch and Leads
Troubleshooting.
3. Faulty components in power supply system components
a. Return for repair or have qualified technician
repair per Service Manual.
G. Torch cuts but not adequately
1. Current set too low at power supply
a. Increase current setting
2. Improper plasma or secondary gas selected for applica-
tion
a. Refer to Cut Quality, Section 4.05-H
3. Torch is being moved too fast across workpiece
a. Reduce cutting speed (refer to Appendix 2, Cut-
ting Speed Charts).
4. Excessive oil or moisture in torch
a. Hold torch 1/8 inch (3 mm) from clean surface
while purging and observe oil or moisture
buildup (do not activate torch)
5. Torch tip contacting workpiece
a. Increase standoff distance
6. Torch tip worn
a. Replace tip
7. Incorrect gas pressure
a. Set correct gas pressure