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TROUBLESHOOTING GUIDE
Trouble What To Do
Not output but fan operates and meter is on.
Poor welding, weld settings drift, or output power is
low.
Main fuses open or Switch PC boards overheated.
Output turns on momentarily then switches off and
repeats. Machine is connected for 380 VAC or higher
input voltage.
OCV is normal (approx. 65-75V) but output power is
low (less than 20V and 100A). Machine makes
squealing noise while under load. Machine is connect-
ed for 230 VAC, or lower, input voltage.
Open circuit voltage is 1-2 volts.
Output control not functioning on remote control. Local
control OK.
Machine does not produce more than 250A output
when connected to 3 phase supply.
Machine does not produce more than 200 A output
while connected to 1 phase supply.
Machine operates OK at 230 VAC or lower. No output
at 380 VAC or higher.
Poor EXX10 stick electrode (5P) performance. Arc
“pops out”.
No output or reduced output the first time power is
applied to the machine.
Perform test steps 1A and 1B.
1. Check front panel wiring and controls.
2. Replace Control PC Board.
Perform test steps 4 and 5 for both Switch PC Boards
and 7.
Perform test steps 3B, 4 and 5.
Perform test steps 4 and 5 for both Switch PC Boards.
Perform test step 6.
1. Check remote control assembly.
2. Check S3, Local/Remote switch.
1. Replace main fuse if blown.
2. Replace Protection PC Board.
3. Replace Control PC Board.
4. Perform test step 7.
Normal operation.
Perform test step 2.
Check D6 and D12, L1 and L2.
Check reconnect panel - connections and fuse.
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.
CAUTION