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MANUAL 0-2510
A. No Weld Output; Unit is Completely Inoperative
1. Line disconnect switch is in OFF position
a. Place line disconnect switch in ON position.
2. Line fuse(s) open
a. Check and replace line fuse(s).
3. Improper electrical input connections
a. See Section 2.04 Electrical Input Requirements, page 17, for
proper input connections.
4. MAIN CIRCUIT BREAKER in OFF position
a. Check and reset MAIN CIRCUIT BREAKER if necessary.
5. INPUT SELECTOR (Easy Link) switch is set to incorrect position for
applied input voltage
a. Verify primary source voltage and set INPUT SELECT
switch to correct setting.
B. WARNING Indicator is ON
1. Unit is in thermal shutdown mode
a. Allow cooling period of approximately five (5) minutes with
the power ON. Duty cycle should be reviewed. To reset the
WARNING indicator, the power supply must be turned
OFF, then ON again.
b. Measure input voltage and verify that it matches the INPUT
SELECTOR (Easy Link) switch setting. The length of the
input power cable must be considered, as there will be a
considerable voltage drop along its length.
C. Erratic or Improper Weld Output
1. Loose welding cable connections
a. Tighten all welding cable connections.
2. Incorrect welding cable size
a. Use proper size and type of cable (see Table 2, page 31).
3. Improper input connections
a. Refer to Section 2.04 Electrical Input Connections, page 17.
4. Poor electrode condition
a. Replace electrode.
5. If using a wire feeder, ensure that the wire is feeding at a consistent
rate
a. Adjust wire feeder.
6. If in GTAW mode, check the condition of the tungsten electrode
a. Use the recommended 2% Thoriated tungsten.
7. In GTAW mode, incorrect argon gas flow
a. Verify that argon gas flow is correct.
8. Incorrectly set PROCESS SELECTOR switch
a. Verify the PROCESS SELECTOR switch is set to match the
type of welding process being conducted.
9. Wrong welding polarity
a. Verify output torch connections.
BASIC TROUBLESHOOTING
Summary of Contents for Thermal Arc 400GMS CC
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