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OM-201 444 Page 23
5-2. Overload Protection
Ref. ST-800 040
1 Circuit Breaker CB1
CB1 protects the welding power
source control circuit from over-
load. If CB1 opens, weld output
drops to the minimum of the range
selected.
Press button to reset circuit break-
er.
1
5-3. Troubleshooting Table
Trouble Remedy
No weld output; unit completely
inoperative.
Place line disconnect switch in On position (see Section 3-12B).
Check and replace line fuse(s), if necessary, or reset circuit breaker (see Section 3-12B).
Check for proper input power connections (see Section 3-12B).
Check for proper jumper link position (see Section 3-12A).
No weld output. Clean and tighten all weld connections (see Section 5-1).
Unit provides only low or minimum
Check for proper line voltage.
weld output.
Check for open line fuse(s), and replace if necessary. Check and replace circuit breakers (see Sec-
tion 3-12B).
Clean and tighten all weld connections (see Section 5-1).
Place Remote Amperage switch in correct position (see Section 4-3).
Select correct size weld cables (see Section 3-8).
Low weld amperage; Amperage Ad-
justment does not control amperage.
Reset circuit breaker CB1, if necessary (see Section 5-2).
Maximum weld output. Have Factory Authorized Service Agent check Amperage Adjustment control.
Erratic or improper weld output. Check for proper input power connections.
Clean and tighten all weld connections (see Section 5-1).
Use proper size and type electrodes.
Excessive line current or line fuse(s)
Check for proper input power connections (see Section 3-12B).
open repeatedly.
Check for proper jumper link position (see Section 3-12A).
Fan not operating and/or over heating. Check for and remove anything blocking fan movement.
Replace fan motor, if necessary.