TROUBLESHOOTING GUIDE
Trouble |
| What To Do |
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Not output but fan operates and meter is on. | Perform test steps 1A and 1B. | |
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Poor welding, weld settings drift, or output power is | 1. | Check front panel wiring and controls. |
low. | 2. | Replace Control PC Board. |
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Main fuses open or Switch PC boards overheated. | Perform test steps 4 and 5 for both Switch PC Boards | |
| and 7. | |
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Output turns on momentarily then switches off and | Perform test steps 3B, 4 and 5. | |
repeats. Machine is connected for 380 VAC or higher |
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input voltage. |
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OCV is normal (approx. | Perform test steps 4 and 5 for both Switch PC Boards. | |
low (less than 20V and 100A). Machine makes |
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squealing noise while under load. Machine is connect- |
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ed for 230 VAC, or lower, input voltage. |
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Open circuit voltage is | Perform test step 6. | |
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Output control not functioning on remote control. Local | 1. | Check remote control assembly. |
control OK. | 2. | Check S3, Local/Remote switch. |
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Machine does not produce more than 250A output | 1. | Replace main fuse if blown. |
when connected to 3 phase supply. | 2. | Replace Protection PC Board. |
| 3. | Replace Control PC Board. |
| 4. | Perform test step 7. |
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Machine does not produce more than 200 A output | Normal operation. | |
while connected to 1 phase supply. |
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Machine operates OK at 230 VAC or lower. No output | Perform test step 2. | |
at 380 VAC or higher. |
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Poor EXX10 stick electrode (5P) performance. Arc | Check D6 and D12, L1 and L2. | |
“pops out”. |
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No output or reduced output the first time power is | Check reconnect panel - connections and fuse. | |
applied to the machine. |
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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 Field Service Facility for technical troubleshooting assistance before you proceed.
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