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OM-478 Page 40
Min or max CV weld output only.
Check position of Amperage/voltage control and Amperage/Voltage Control switch.
Repair or replace remote control device.
Have Factory Authorized Service Agent check optional CV regulator board PC2.
Tungsten electrode oxidizing and not
remaining bright at end of weld.
Shield weld zone from drafts.
Increase postflow time.
Check and tighten all gas fittings.
Properly prepare tungsten.
Wandering arc – poor control of direc-
tion of arc.
Reduce gas flow rate.
Select proper size tungsten.
Properly prepare tungsten.
B. Auxiliary Power Trouble
Trouble Remedy
No output at ac receptacles. Reset circuit breakers (see Section 6-1, 6-2, or 6-3).
Press GFCI reset button on GFCI receptacles (see Section 6-1).
Check fuse F6, and replace if necessary (see Section 8-7).
Have Factory Authorized Service Agent check brushes and slip rings.
No or low output at single or three-
phase auxiliary power plant.
Place Output(Contactor) or Amperage/Voltage switch in Panel position, or connect remote contactor
to Remote 14 receptacle or terminal strip 3T (see Sections 4-8 and 4-9).
Place CV/CC switch in CC position.
Place Output Selector switch in Electrode Positive, Electrode Negative, or AC position.
Check and replace fuse F1, F2, and/or F3 if necessary (see Section 6-4).
Check engine speed, and adjust if necessary (see Section 8-6).
Have Factory Authorized Service Agent check brushes and slip rings, and circuit boards PC1 and
PC2.
Check position of max OCV On/Off switch. If switch is in Off position, turn Amperage/Voltage control
to max for full output from auxiliary power plant.
High auxiliary power output voltage. Check engine speed, and adjust if necessary (see Section 8-6).
Low auxiliary power output voltage. Check fuse F6, and replace if necessary (see Section 8-7).
C. Engine
Trouble Remedy
Engine does not start. Check fuel level (see Section 4-4).
Check battery, and replace if necessary.
Check magnetic shutdown switch fuse F, and replace if necessary (see Section 8-7).
Check engine battery charging system according to engine service manual.
Engine suddenly stops. If Check Cooling System/Alternator light is on, check engine belt.
Check engine oil level (see Section 4-4). Engine stops if oil pressure is too low or oil temperature is
too high.
Check magnetic shutdown switch fuse F, and replace if necessary (see Section 8-7).
Engine remains at idle rpm when Engine
Control switch is in the Run or Run/ Idle
position and a load is applied.
Have Factory Authorized Service Agent check continuity and connections of current transformer CT1
and idle module.