Tweco PC250 - Manual (Page 19)

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6. Install the electrode, gas distributor, tip and shield
cup.
7. 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.
Improper assembly or use of non stan-
dard torch parts can cause the torch head to short and may
overheat or damage the torch.
BASIC TROUBLESHOOTING GUIDE
A. General
Basic troubleshooting of the Firepower PC250 plasma cutting system can be performed without special equipment
or knowledge, and without opening the enclosure.
This basic troubleshooting guide covers input power, gas supply, and torch problems.
For problems not covered here, refer to the Advanced Troubleshooting Guide or contact your authorized distributor.
If a product must be returned for service, contact your authorized distributor. Materials returned to the Manufacturer
without proper authorization will not be accepted.
B. How to use this Guide
The following information is a guide to help 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 the unit is fully operational after any repairs.
A. AC indicator OFF, Fan does not operate.
1. Circuit Breaker open.
a. Reset Breaker.
For 115 VAC Units use 20 amp or greater service.
B. AC indicator ON, Over TEMP (temperature) indicator ON.
1. Unit is overheated.
a. Make sure the unit has not been operated beyond 40% duty cycle limit.
2. Airflow obstructed.
a. Provide at least 12 inch clearance on each side.
3. Shorted torch. TEMP indicator lights momentarily and unit shuts down.
a. Check for proper torch parts assembly, or for shorted torch head.
ƽ CAUTION
Figure E Electrode Wear
A-01270
New Electrode
Worn Electrode