Miller Electric S-62, S-64 manual Troubleshooting, Disconnect power before troubleshooting

6-2. Troubleshooting

		Y Disconnect power before troubleshooting
	Trouble	Remedy
Wire feeds, shielding gas flows, but		Check interconnecting cord connections. If secure, check cord for continuity and repair or replace
electrode wire is not energized.		(see Sections 4-3 and 4-4).
Wire feeder is on, meter(s) do not light		Check and reset CB1 (see Section 5-2).
up, motor does not run, gas valve and
welding power source contactor do not
pull in.
Electrode wire feeding stops or feeds		Check gun trigger connection. See gun Owner’s Manual.
erratically during welding.
		Check gun trigger. See gun Owner’s Manual.
		Readjust hub tension and drive roll pressure (see Section 4-8).
		Change to correct size drive roll (see Table 8-1).
		Clean or replace dirty or worn drive roll.
		Incorrect size or worn wire guides.
		Replace contact tip or liner. See gun Owner’s Manual.
		Remove weld spatter or foreign matter from around nozzle opening.
		Have Factory Authorized Service Agency check drive motor or motor control board PC1.
Motor runs slowly.		Check for correct input voltage.
Wire does not feed until trigger is		Check for a short between welding gun trigger leads and weld cable. Repair short or replace welding
pulled, but continues to feed after trig-		gun.
ger is released, and trigger hold is not
on.
Gas valve in feeder is rattling loudly		Check for a short between welding gun trigger leads and weld cable. Repair short or replace welding
along with possible erratic or slow wire		gun.
feed speed.
Unit does not switch out of Run-In		When using this unit with certain older style Miller CV power sources, a weld current sensor
Speed.		(Part No. 160 963) must be used. Power sources include the Deltaweld prior to Serial No. KG141349
		and the Dimension prior to Serial No. KC253517.
Wire feeder power is on, displays light		Check welding gun trigger leads for continuity, and repair leads or replace gun.
up, but unit is inoperative.
Schedule A Wire Feed Speed works,		DIP Switch S1(1) on Option Interface Board PC70 must be in the On position (see Section 4-9).
but Schedule B Wire Feed Speed does
not work or is erratic.
Wire Feed Speed Meter display does		Set DIP Switch S2 on Meter Board PC60 in Inches/Minute mode (see Section 4-9).
not match actual wire feed speed.
Actual arc voltage display on meter is		Set DIP Switch S2 on Meter Board PC60 in Voltage Monitor mode (see Section 4-9).
held after trigger is released, or arc
voltage does not change while welding.

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