Tweco 6045 Excel Arc - Manual (Page 36)

EXCEL ARC 6045 SERVICE
Manual 0-5213 5-4 August 26, 2011
5.06 Operator Troubleshooting
The Excel Arc ® 6045 is the power supply, one component in
a welding system. Other system components may include
a Wire Feeder, Remote Current Control Potentiometer,
Remote Output Enable (START) switch, MIG Gun, TIG
Torch, Electrode Holder and cables, Gas Control Valve
and Gas Regulators. These components may each have a
manual and may be required to solve the problem.
Before proceeding with this manual section, it is
recommended to review the Machine Set-Up and
Operation section and also verify that the correct polarity
is observed for the particular welding operation being
performed.
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
fi rst), then remedies. Repair as needed being sure to verify
that unit operates properly after any repairs.
5.07 Troubleshooting All Modes of
Operation
A. All indicator lights on the machine are OFF. Fan
does not turn.
1. ON / OFF SWITCH (SW1) is in the OFF position.
a. Turn SW1 to ON position.
2. Fuse F1 blown.
a. Check and replace if open.
3. Primary Power Problem.
a. Measure for correct voltage at the Primary
Power Receptacle.
4. Input Power Cable connected incorrectly.
a. See “3.05 Replacing the Input Power
Cable” on page 3-4 for correct installation.
5. Defective Input Power Cable.
a. Check continuity.
6. Unit is overheated and one of the T1 thermal switches
TS1-TS3 has opened.
a. Unit should be inspected by authorized service
personnel prior to operating the machine.
B. OVER TEMPERATURE INDICATOR is on. No output
from the unit.
Allow the unit to cool. The output will come back on
automatically in STICK (CC) or VS MIG modes when the
OVERTEMP indicator goes OFF. In MIG or TIG modes,
because this is a Latched Fault it requires that the remote
OUTPUT ENABLE (START) signal be removed and be
turned to OFF position before it will reset the machine.
If
the OVER TEMPERATURE INDICATOR remains ON contact
an authorized service facility.
1. Duty Cycle has been exceeded.
2. Ambient temperature is too high.
a. Operating duty cycle must be reduced at
elevated ambient temperature conditions exist.
3. Inadequate ventilation space around the unit.
a. Check air intake and exhaust openings.
Openings must be unobstructed.
C. Unit output is low or cannot be adjusted.
1. O U T P U T V O LTA G E / C U R R E N T C O N T R O L
POTENTIOMETER (R1) is set too low.
a. Increase setting of R1.