Hobart Welding Products 500 manual Overload Protection, Troubleshooting Table, Trouble Remedy

5-2. Overload Protection

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

Ref. ST-800 040

5-3. Troubleshooting Table

Trouble	Remedy
No weld output; unit completely	Place line disconnect switch in On position (see Section 3-12B).
inoperative.
	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-	Reset circuit breaker CB1, if necessary (see Section 5-2).
justment does not control amperage.
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.

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