Troubleshooting Table - Miller SRH-444 Mode D'emploi

6-3. Troubleshooting Table

Trouble
No weld output; unit completely
inoperative.
No weld output.
Unit provides only low or minimum
weld output. weld output
Low weld amperage; Amperage Ad-
justment does not control amperage.
Maximum weld output.
Erratic or improper weld output.
Excessive line current or line fuse(s)
open repeatedly. open repeatedly
Fan not operating and/or over heating.
Place line disconnect switch in On position (see Section 4-13B).
Check and replace line fuse(s), if necessary, or reset circuit breaker (see Section 4-13B).
Check for proper input power connections (see Section 4-13B).
Check for proper jumper link position (see Section 4-13A).
Clean and tighten all weld connections (see Section 6-1).
Check for proper line voltage.
Check for open line fuse(s), and replace if necessary. Check and replace circuit breakers (see Sec-
tion 4-13B).
Clean and tighten all weld connections (see Section 6-1).
Place Remote Amperage switch in correct position (see Section 5-3).
Select correct size weld cables (see Section 4-8).
Reset supplementary protector CB1, if necessary (see Section 6-2).
Have Factory Authorized Service Agent check Amperage Adjustment control.
Check for proper input power connections.
Clean and tighten all weld connections (see Section 6-1).
Use proper size and type electrodes.
Check for proper input power connections (see Section 4-13B).
Check for proper jumper link position (see Section 4-13A).
Check for and remove anything blocking fan movement.
Replace fan motor, if necessary.
Remedy
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