Miller Electric SRH-503 manual Troubleshooting Table, Trouble Remedy

6-3. Troubleshooting Table

	Trouble		Remedy
No weld output; unit completely		Place line disconnect switch in On position (see Section 4-12).
inoperative.
		Check fuse F1 and replace if necessary (see Section 6-2).
		Check and replace line fuse(s) if necessary (see Section 4-12).
		Check for proper input power connections (see Section 4-12).
		Check for proper jumper link position (see Section 4-11).
No weld output, power switch light on,		Unit overheated, allow unit to cool (see Section 4-2). NOTE: When unit has cooled, fan starts and
but fan off.		weld output is present at the weld output terminals and/or at the electrode.
No weld output, but fan on.		Clean and tighten all weld connections (see Section 6-1).
Unit provides only low or minimum		Check for proper line voltage (see Section 4-12).
weld output.
		Check for proper input power connections (see Section 4-12).
		Check for proper jumper link position (see Section 4-12).
		Check for open line fuse(s), and replace if necessary (see Section 4-12).
		Clean and tighten all weld connections (see Section 6-1).
		Select correct size weld cables (see Sections 4-7and 4-8).
		Have factory authorized Service Agent check rectifier SR1.
Erratic or improper weld output.		Check for proper input power connections (see Section 4-12).
		Use proper size and type weld cables (see Sections 4-7and 4-8).
		Clean and tighten all weld connections (see Section 6-1).
		Use proper size and type electrodes.
		Have factory authorized Service Agent check rectifier SR1.
Excessive line current or line fuse(s)		Check for proper input power connections (see Section 4-12).
open repeatedly.
		Check for proper jumper link position (see Section 4-11).
Fan not operating and/or over heating.		Check for and remove anything blocking fan movement.
		Have factory authorized Service Agent check fan motor.

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