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| TROUBLESHOOTING |
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| Observe all Safety Guidelines detailed throughout this manual |
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| TROUBLESHOOTING GUIDE |
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| Observe Safety Guidelines | ||||||
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| detailed in the beginning of this manual. | |||||||
| PROBLEMS |
| POSSIBLE |
| RECOMMENDED |
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| (SYMPTOMS) |
| CAUSE |
| COURSE OF ACTION |
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| BASIC MACHINE PROBLEMS |
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| Machine wonʼt weld, canʼt get any |
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| 1. Input voltage is too low or too |
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| 1. Make certain that input voltage is | |||||
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| output. |
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| high. |
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| correct, according to the Rating |
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| (CR1 will not pull in.) |
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| Plate located on the rear of the |
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| This problem will normally be |
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| machine. |
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| 2. Thermal Error. |
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| 2. See | “Thermal | LED | is |
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| accompanied by an error code. |
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| Error codes are displayed as a |
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| ON” section. |
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| series of red and green flashes by |
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| 3. Primary current limit has been |
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| 3. Possible short in output circuit. |
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| the status light(s). See “Status |
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| Light” section of this document for |
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| exceeded. (the main contactor |
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| Turn machine off. Remove all |
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| additional information. |
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| drops out when output is initiat- |
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| loads from the output of the |
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| ed – see error 31). |
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| machine. Turn back on, and acti- |
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| vate output. If condition persists, |
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| turn power off, and contact an |
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| authorized Lincoln Electric Field |
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| Service facility. |
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| 4. Inverter Fault - switch pc board, |
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| 4. Contact your local authorized |
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| contactor problem, etc. |
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| Lincoln Electric Field Service |
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| facility for technical assistance. |
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| Thermal LED is ON. |
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| 1. Improper fan operation. |
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| 1. Check for proper fan operation. |
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| (Fans should run whenever out- |
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| put power is on.) | Check for |
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| material blocking | intake | or |
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| exhaust louvers, or for excessive |
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| dirt clogging cooling channels in |
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| machine. |
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| 2. Output Rectifier board or Choke |
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| 2. After | machine has cooled, |
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| thermostat. |
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| reduce load, duty cycle, or both. |
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| Check for material blocking |
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| intake or exhaust louvers and |
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| heat sink fins. |
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| 3. DC Bus PC board thermostat. |
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| 3. Check for excessive load on |
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| 40VDC supply. |
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| 4. Open thermostat circuit. |
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| 4. Check for broken wires, open |
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| connections or faulty ther- |
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| mostats on the DC Bus and |
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| Output Rectifier heat sinks, and |
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| Choke assembly. |
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CAUTION
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, con- tact your local authorized Lincoln Electric Field Service Facility for technical assistance.
POWER WAVE® i400
