Hobart Welding Products OM-230 455D manual Troubleshooting Power Source, Check Control board PC1

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6-6. Troubleshooting Power Source

Is input power connected to correct line voltage?

Yes

Is Power switch in the On position?

Yes

Is Power light on?

Yes

No

No

No

Connect unit to proper input voltage. (see Section 4-9).

Place Power switch in the On position. (see Section

5-1).

*

Check Power switch S1 (see Section 6-2). Check

Control board PC1.

Are Power and

Temp lights flashing?

No

Is compressor operating?

Yes

Does pilot arc ignite?

Yes

No

No

*

The compressor current lim- it was exceeded either above or below its operating

range (see Section 6-2).

*

Momentarily press torch trigger and listen for com- pressor operation. Check for Postflow air at torch. Check Control board PC1, compressor filter, and com- pressor connections to PC1 and torch.

Press torch trigger and check if pilot arc ignites. Check torch consumables. *Check torch connections, Control board PC1, com- pressor, and torch.

Is Power light flashing?

No

Is Cup light flashing?

No

Is Temp light On?

Yes

Yes

Yes

*

Reset Power switch S1 and verify input line voltage during cutting (see Section 6-2).

Check Control board PC1.

Check torch consumables (see Sections 6-2and 6-3).

*

Unit overheated or ambient temperature is below −40° C (−40° F) (see Section 6-2). Check function of cooling fan.

Yes

Does pilot arc

transfer to workpiece?

Yes

*

Check all connections.

No

Place torch near workpiece and check if pilot arc “jumps” or transfers to workpiece.

Check work clamp connec- tion. *Check Control board PC1 and connections, and torch and its connections.

No	*Servicing procedure to be performed
	only by authorized Service Station.

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