ARC 8 0 0
PRO
WEL D
11.0 TROUBLE SHOOTING
CAUTION
Read and follow the safety information at the beginning of this section before proceeding
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. Unit Overheated. 3. Allow unit to cool/ then reduce
weld rate to prevent reoccurrence.
4. Defective thermal switch. 4. Check and replace.
5. Defective 600-0015 P.C. board. 5. Replace.
6. Shorted control cables. 6. Repair.
Low output. 1. Low incoming line voltage 1. Current low line voltage.
2. Incorrect jumper link connection 2. Check jumper links on primary
on primary board. board for proper voltage.
3. Defective 600-0015 P.C. board. 3. Replace.
4. Defective current potentiometer. 4. Replace.
5. Excessive weld cable length. 5. Reduce cable length.
Maximum output but 1. Defective 600-0015 P.C. board. 1. Replace.
no control. 2. Open lead going to shunt 2. Repair broken leads on
(shielded cable). connection.
3. Defective current potentiometer. 3. Replace.
Gun does not lift. 1. Blown 4 amp fuse. 1. Check and replace fuse.
2. Defective 600-0015 P.C. board. 2. Replace.
3. Defective control cable or 3. Repair short in cable, replace
gun coil. gun coil.
4. Defective trigger switch on gun. 4. Replace.
5. Blown 1 Amp fuse. 5. Replace.
Gun lifts but does not 1. Blown 15 amp sustaining arc fuse. 1. Check and replace fuse.
weld. 2. Defective sustaining arc SCR(s). 2. Replace bad part(s).
3. Defective 600-0015 P.C. board. 3. Replace.
4. Defective choke coil. 4. Check and Replace.
5. Open weld cable or bad weld 5. Check and Repair.
ground connection.
Gun lifts but does not 1. Defective 600-0015 P.C. board. 1. Replace.
Plunge. 2. Defective time potentiometer. 2. Replace.
3. Bind within welding gun. 3. Perform gun maintenance
PAGE 7
Содержание ARC 800
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Страница 4: ...ARC 800 PRO WELD ...
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Страница 6: ...ARC 800 PRO WELD ...
Страница 7: ...ARC 800 PRO WELD ...
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Страница 20: ...WELD PRO MANUFACTURED BY MADE IN THE U S A ...