Troubleshooting Table - Miller SRH-444 Manuel D'utilisation

7-3. Troubleshooting Table

Trouble
No weld output; unit completely
inoperative.
No weld output.
Unit provides only low or minimum
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.
Fan not operating and/or over heating.
When TIG welding, output current does
not match the Amperage Adjustment
control setting.
OM-2230 Page 24
Place line disconnect switch in On position (see Section 5-10).
Check and replace line fuse(s), if necessary, or reset circuit breaker (see Section 5-10).
Check for proper input power connections (see Section 5-9B).
Check for proper jumper link position (see Section 5-9).
Clean and tighten all weld connections (see Section 7-1).
Check for proper line voltage.
Check for open line fuse(s), and replace if necessary. Check and replace circuit breakers (see Sec-
tion 5-10).
Clean and tighten all weld connections (see Section 7-1).
Place Remote Amperage switch in correct position (see Section 6-2).
Select correct size weld cables (see Section 5-4).
Reset supplementary protector CB1 (see Section 7-2).
Have Factory Authorized Service Agent check Amperage Adjustment control.
Check for proper input power connections.
Clean and tighten all weld connections (see Section 7-1).
Use proper size and type electrodes.
Check for proper input power connections (see Section 5-9B).
Check for proper jumper link position (see Section 5-9).
Check for anything blocking fan movement.
Check fan motor, and replace, if necessary.
The amperage adjustment scale applies to the Stick process only. The scale does not apply while
using the TIG process with this machine. Actual output current is higher while using the TIG process.
Remedy