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OM-4401 Page 35
Trouble Remedy
Min or max CV weld output only. Check position of Voltage/Amperage Adjustment control and Voltage/Amperage Adjust switch (see Sec-
tion 5-1).
Repair or replace remote control device.
Have Factory Authorized Service Agent check field current regulator board PC2.
Lack of high frequency; difficulty in
establishing Gas Tungsten Arc Weld-
ing arc.
Use proper size tungsten for welding amperage.
Reduce leakage of high frequency from torch or work cable (check grounding, remove excessive
coils from weld cables, use shorter weld cables, etc.).
Check cables and torch for cracked or deteriorated insulation or bad connections. Repair or replace
necessary parts.
Wandering arc – poor control of arc
direction.
Reduce gas flow rate.
Select proper size tungsten. Properly prepare tungsten.
Tungsten electrode oxidizing and not
remaining bright after conclusion of
weld.
Shield weld zone from drafts.
Increase postflow time.
Check and tighten all gas fittings.
Properly prepare tungsten.
B. Generator Power
Trouble Remedy
No generator power output; weld out-
put okay.
Reset circuit breakers CB1, CB3 and/or CB4 (see Section 6-1).
Check fuse F1, and replace if necessary (see Section 7-9).
Have Factory Authorized Service Agent check brushes, slip rings, and voltage regulator board PC6.
No generator power or weld output. Disconnect equipment from generator power receptacles during start-up.
Check fuses F1 and F2, and replace if necessary (see Section 7-9).
Have Factory Authorized Service Agent check brushes and slip rings, integrated rectifier SR2, field ex-
citation circuit, field current control board PC2, and the rotor.
Low power output. Check and clean air cleaner as necessary (see Section 7-4).
Check and adjust engine speed (see Section 7-8).
Have Factory Authorized Service Agent check voltage regulator board PC6.
See engine manual.
High power output. Check and adjust engine speed (see Section 7-8).
Have Factory Authorized Service Agent check voltage regulator board PC6.
Erratic power output. Have Factory Authorized Service Agent check brushes, slip rings, and field current control board PC2.
Check receptacle wiring and connections.
Check governor according to engine manual.