Miller Electric Delta-Fab manual Troubleshooting Table, Trouble Remedy

5-4. Troubleshooting Table

	Trouble		Remedy
No weld output; unit completely		Place line disconnect switch in On position (see Section 3-14).
inoperative.
		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).
No weld output; Power switch pilot light		Check, repair, or replace feeder (see wire feeder Owner’s Manual).
on; fan on.
		Unit overheated. Allow unit to cool with fan On (see Section 3-2).
		Have Factory Authorized Service Agent check control board PC1.
Unit provides only maximum or mini-		Have Factory Authorized Service Agent check control board PC1.
mum weld output.
Erratic or improper weld output.		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.
No 115 volts ac output at duplex		Reset supplementary protector CB1 (see Section 3-7).
receptacle or Remote 14 receptacle.
No 24 volts ac output at Remote 14 re-		Reset supplementary protector CB2 (see Section 3-7).
ceptacle.
Fan not operating.		Check for and remove anything blocking fan movement.
		Have Factory Authorized Service Agent check fan motor.

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