Miller Electric SRH-503 - Manual (Page 25)

OM-2236 Page 21
6-3. Troubleshooting Table
Trouble Remedy
No weld output; unit completely
inoperative. Place line disconnect switch in On position (see Section 4-12).
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,
but fan off. Unit overheated, allow unit to cool (see Section 4-2). NOTE: When unit has cooled, fan starts and
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
weld output. 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 4-7 and 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 4-7 and 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)
open repeatedly. 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.