Tweco 51 with SL100SV CutMaster - Manual (Page 70)

SERVICE 5-6 Manual 0-4640
5
5.03 Basic Troubleshooting
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.
A. Basic Troubleshooting: Overview
This guide covers basic troubleshooting. It is helpful for solving many of the common problems that can arise with this system.
Follow all instructions as listed and complete each section in the order presented.
B. How to Use This Guide
The following information will help the Operator determine the most likely causes for various symptoms. Follow all instructions
as listed and complete each section in the order presented.
This guide is set up in the following manner:
X. Symptom (Bold Type)
Any Special Instructions
1. Cause
a. Check / Remedy
Locate your symptom, check the causes (easiest listed first), then remedies. Repair as needed being sure to verify that unit
operates properly after any repairs.
C. Common Symptoms
A. AC indicator OFF
1. Switch at main power panel in OFF (open) position.
a. Close main power switch.
2. Power Supply ON / OFF switch in OFF (down) position.
a. Turn switch to ON (up).
3. Torch is not connected properly to Power Supply
a. Turn power supply ON / OFF switch to OFF (down). Check torch connection to Power Supply. Tighten or
adjust as required. Do not use tools. Turn power supply ON / OFF switch to ON (up).
4. Shield cup not fully tightened on torch head
a. Check shield cup for proper installation. Do not overtighten. Do not use tools to tighten.
CAUTION
When the shield cup is properly installed, there is a slight gap between the shield cup and the torch head. Gas vents
through this gap as part of normal operation. Do not attempt to force the shield cup to close this gap. Forcing the
shield cup against the torch head can damage components.
5. Main power line fuse(s) or circuit breaker(s) blown
a. Check main power panel fuse(s). Replace as required.