Troubleshooting Table - Miller Delta-Fab Manuel Du Propriétaire

6-4. Troubleshooting Table

Trouble
No weld output; unit completely
inoperative.
No weld output; Power switch pilot light
on; fan on.
Unit provides only maximum or mini-
mum weld output.
Erratic or improper weld output.
No 115 volts AC output at duplex
receptacle or Remote 14 receptacle.
No 24 volts AC output at Remote 14
receptacle.
Fan not operating.
OM-2241 Page 24
Place line disconnect switch in On position (see Section 4-15).
Check fuse F1, and replace if necessary (see Section 6-2).
Check and replace line fuse(s), if necessary, or reset circuit breaker (see Section 4-15).
Check for proper input power connections (see Section 4-15).
Check for proper jumper link position (see Section 4-14).
Check, repair, or replace feeder (see wire feeder Owner's Manual).
Unit overheated. Allow unit to cool with fan On (see Section 4-3).
Have Factory Authorized Service Agent check control board PC1.
Have Factory Authorized Service Agent check control board PC1.
Use proper size and type of weld cable (see Section 4-9).
Clean and tighten all weld connections.
Check wire feeder installation according to Owner's Manual.
Have Factory Authorized Service Agent check control board PC1 and/or SCR in main rectifier.
Reset supplementary protector CB1 (see Section 4-8).
Reset supplementary protector CB2 (see Section 4-8).
Check for and remove anything blocking fan movement.
Have Factory Authorized Service Agent check fan motor.
Remedy