Miller 907364 Manuale d'uso - Pagina 35

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Miller 907364 Manuale d'uso

6-3. Troubleshooting

Trouble
No weld output; unit completely inop-
erative.
No weld output; Power switch pilot light
on; fan on.
No weld output; Power switch pilot light
on; fan off.
Unit provides only maximum or mini-
mum weld output.
Erratic or improper weld output.
No 115 volts AC output at duplex re-
ceptacle, Remote 14 receptacle.
No 24 volts AC output at Remote 14
receptacle.
Fan not operating. Fan only runs when
cooling is necessary.
Place line disconnect switch in On position (see Section 4-17).
Check fuse F1, and replace if necessary (see Section 6-2).
Check and replace line fuse(s), if necessary, or reset circuit breaker (see Section 4-17).
Check for proper input power connections (see Section 4-17).
Check for proper jumper link position (see Section 4-16).
If using remote control, place Output (Contactor) switch in Remote 14 position, and connect remote
control (see Section 4-14). If remote is not being used, place switch in On position.
Check, repair, or replace remote control.
Unit overheated. Allow unit to cool with fan On (see Section 4-4).
Have Factory Authorized Service Agent check control board PC1.
Check for proper input power connections (see Section 4-17).
Check and replace line fuse(s), if necessary, or reset circuit breaker (see Section 4-17).
Have Factory Authorized Service Agent check SCR's.
Have Factory Authorized Service Agent check control board PC1 and hall device HD1.
Use proper size and type of weld cable (see Section 4-10 and 4-11).
Clean and tighten all weld connections.
Check position of Polarity selector switch (see Section 5-1).
Have Factory Authorized Service Agent check control board PC1 and hall device HD1.
Reset supplementary protector CB1 (see Section 4-9).
Reset supplementary protector CB2 (see Section 4-9).
Check for and remove anything blocking fan movement.
Have Factory Authorized Service Agent check fan motor.
Remedy
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