Pro-Weld ARC 656-575 VERSION, Руководство по эксплуатации и обслуживанию

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ARC 6 5 6
PRO WEL D
11.0 TROUBLE SHOOTING
Whenever possible, have a qualified electrician do the maintenance and trouble shooting work. Turn the input power off us-
ing the disconnect switch at the fuse box before working inside the machine.
Trouble Possible Cause What To Do
Unit trips off without 1. Defective main SCR. 1. Check for defective SCR and
welding. replace.
2. Defective sustaining arc SCR. 2. check and replace.
3. Defective 600-0016 P.C.board 3. Replace.
4. Shorted control cables 4. Repair.
Low output. 1. Input fuse blown. Unit is single 1. Replace fuse, repair input line.
phase. Check for reason for fault.2.
2. Incorrect primary jumper link 2. Check jumper links
connection for proper voltage.
3. Defective 600-0016 P.C. board. 3. Replace.
Maximum output but 1. Defective 600-0016 P.C. board. 1. Replace.
no control.
Gun does not lift. 1. Blown 4 amp fuse. 1. Check and replace fuse.
2. Defective 600-0016 P.C. board. 2. Replace.
3. Defective control cable or 3. Repair short in cable, replace
gun coil. gun coil.
6. Blown 1 amp fuse 6. Check and replace fuse
Gun lifts but does not 1. Blown 25 amp sustaining arc fuse. 1. Check and replace fuse.
weld. 2. Defective sustaining arc SCR(s). 2. Replace bad part(s).
3. Defective 600-0016 P.C. board. 3. Replace.
4. Defective sustaining arc . 4. Check and Replace.
resister.
5. Open weld cable or bad weld 5. Check and Repair.
ground connection.
Gun lifts but does not 1. Defective 600-0016 P.C. board. 1. Replace.
Plunge. 2. Defective time potentiometer. 2. Replace.
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