Tweco Max 300 w-TD-750 - Manual (Page 36)

SERVICE 30 Manual 0-2557
9. Hand tighten the shield cup until it is seated on the
torch head. If resistance is felt when installing the cup,
check the threads before proceeding.
5.05 Troubleshooting Guide
A. Troubleshooting
This Sub-Section covers troubleshooting that requires
dissasembly and electronic measurements. It is helpful
for solving many of the common problems that can arise
with this torch assembly.
B. How to use this Guide
The following information is a guide to help the Cus-
tomer/Operator determine the most likely causes for
various symptoms.
This guide is set up in the following manner:
X. Symptom (Bold Type)
Any Special Instructions (Text Type)
1. Cause (Italic Type)
a. Check/Remedy (Text Type)
Locate your symptom, check the causes (easiest listed first)
then remedies. Repair as needed being sure to verify that
unit is fully operational after any repairs.
A. Torch will not pilot when torch switch is activated
1. Control Module RUN/PURGE/SET switch in SET
position
a. Place RUN/PURGE/SET switch to RUN posi-
tion.
2. Torch switch activated during 20 second pre-flow
a. Release torch switch and wait at least 20 sec-
onds before activating switch again
3. Faulty torch parts
a. Inspect torch parts and replace if necessary. Re-
fer to Section 5.04, Inspection and Replacement
Consumable Torch Parts
4. Gas pressure too high
a. Set pressure to 50 psi.
5. Faulty components in torch and leads assembly
a. Inspect torch assemblies and replace if neces-
sary. Refer to Section 5.09, Torch and Leads
Troubleshooting.
6. Faulty components in power supply system components
a. Return for repair or have qualified technician
repair per Service Manual.
B. No cutting output
1. Torch not properly connected to power supply
a. Check that torch leads are properly attached to
power supply
2. Faulty components in torch and leads assembly
a. Inspect torch assemblies and replace if neces-
sary. Refer to Section 5.09, 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 adjusted to proper setting.
2. Faulty components in torch and leads assembly
a. Inspect torch assemblies and replace if neces-
sary. Refer to Section 5.09, Torch and Leads
Troubleshooting.
3. 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 adjusted to proper setting.
2. Faulty components in torch and leads assembly
a. Inspect torch assemblies and replace if neces-
sary. Refer to Section 5.09, Torch and Leads
Troubleshooting.
3. Faulty components in power supply system components
a. Return for repair or have qualified technician
repair per Service Manual.
E. Erractic 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.