![](/images/new-backgrounds/1315397/31539751x1.webp)
5-3. Troubleshooting
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| Trouble |
| Remedy | |
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Wire does not feed, unit completely inop- |
| Turn Power switch On. | ||
erative. |
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| Check circuit breaker CB1 (see Section |
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| Check Interconnecting control cord connections (see Section |
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| Check input power. |
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Wire does not feed. |
| Check circuit breaker CB1 (see Section | ||
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| Check gun trigger connection at wire feeder. Check gun trigger leads and trigger switch. See gun Owner’s |
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| Manual. |
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| Check ground current sensor (see Section |
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| Check welding circuit for shorts to case activating ground current sensor. |
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| Have Factory Authorized Service Agent check drive motor and control board PC1. |
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Wire feeds erratically. |
| Readjust hub tension and drive roll pressure (see Section | ||
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| Use correct size drive roll (see Parts List). |
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| Clean or replace dirty or worn drive roll (see Section |
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| Remove weld spatter around nozzle opening. |
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| Replace contact tip or liner. See gun Owner’s Manual. |
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| Have Factory Authorized Service Agent check drive motor and control board PC1. |
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Wire feeds when Jog switch is pressed |
| Check gun trigger connection at wire feeder. Check gun trigger leads and trigger switch. See gun Owner’s | ||
but not when gun trigger is pressed. |
| Manual. | ||
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Wire feeds as soon as power is applied. |
| Check gun trigger. See gun Owner’s Manual. | ||
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Wire does not feed until trigger is |
| Check for short between gun trigger leads and weld cable. Repair or replace gun trigger leads. | ||
pressed but continues to feed after |
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trigger is released. |
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Gas does not flow; wire feeds. |
| Check gas valve and flowmeter. | ||
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