Troubleshooting Table - Miller Electric Delta-Fab Owner's Manual

5-4. 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 re-
ceptacle.
Fan not operating.
Place line disconnect switch in On position (see Section 3-14).
Check fuse F1, and replace if necessary (see Section 5-2).
Check and replace line fuse(s), if necessary, or reset circuit breaker (see Section 3-14).
Check for proper input power connections (see Section 3-14).
Check for proper jumper link position (see Section 3-14).
Check, repair, or replace feeder (see wire feeder Owner's Manual).
Unit overheated. Allow unit to cool with fan On (see Section 3-2).
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 3-8).
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 3-7).
Reset supplementary protector CB2 (see Section 3-7).
Check for and remove anything blocking fan movement.
Have Factory Authorized Service Agent check fan motor.
Remedy
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