Troubleshooting Power Source - Hobart Welders AirForce 250ci Manuel Du Propriétaire

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
Is Power light
flashing?
No
Yes
Is Cup light
flashing?
No
Yes
Is Temp light
On?
No
OM-230 455 Page 26
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A complete Parts List is available at www.HobartWelders.com
Connect unit to proper input
No
voltage. (see Section 4-10).
Place Power switch in the
No
On position. (see Section
5-1).
*
Check Power switch S1
No
(see Section 6-2). Check
Control board PC1.
*
Reset Power switch S1 and
Yes
verify input line voltage during
cutting (see Section 6-2).
Check Control board PC1.
Check torch consumables
(see Sections 6-2 and 6-3).
*
Unit overheated or ambient
temperature is below −40° C
(−40° F) (see Section 6-2).
Check function of cooling
fan.
Yes
Are Power and
Temp lights
flashing?
No
No
Is compressor
operating?
Yes
No
Does pilot arc
ignite?
Yes
No
Does pilot arc
transfer to
workpiece?
Yes
*
Check all connections.
*Servicing procedure to be performed
only by authorized Service Station.
*
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.
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.