Multiquip operation manual BLW-400SSW Troubleshooting Welder

Table of Contents

BLW-400SSW — TROUBLESHOOTING (WELDER)

Practically all breakdowns can be prevented by proper handling and maintenance inspections, but in the event of a breakdown, please take a remedial action following the

diagnosis based on the Welder Troubleshooting (Table 16) information shown below and on the proceeding page. If the problem cannot be remedied, consult our company's business office or service plant.

TABLE 16. WELDER TROUBLESHOOTING

SYMPTOM	POSSIBLE PROBLEM	SOLUTION
	Low speed?	Refer to "Engine remains at low speed" section.
	Defective resistor (R)?	Replace resistor.
AC voltage is not present in
	Defective field controller?	Replace 'Field Controller'.
generator's AC section or welding
	Defective rotor?	Replace rotor.
section
	Defective wiring?	Repair wiring.
	Blown fuse F3?	Replace fuse.
	Defective field controller?	Replace 'Field Controller'.
	Defective rotor?	Replace rotor.
Poor welding and low voltage in	Low speed?	Refer to "Engine remains at low speed" section.
AC power section.
	Layer short-circuit in armature	Replace armature.
	winding?
	Defective wiring?	Repair wiring.
	Defective current transformer?	Replace transformer, CT1, CT2, or CT3.
	Defective field controller?	Replace 'Field Controller'.
	Defective rectifier(RE)?	Replace rectifier.
AC power is normal but there is	Defective reactor (DCL or L1 or L2)?	Replace reactor.
	Inadequate length and thickness of
no welding capability. Voltage		See table 2 for correct welding cable.
adjustment is in-operative.	welding cable.
	Layer short-circuit in armature	Replace armature.
	winding?
	Defective wiring?	Repair wiring.
	Defective selector switch?	Replace S1 switch.
	Defective circuit breaker?	Replace circuit breaker.
AC power is too low or cannot be	Layer short-circuit in armature winding	Replace armature.
	(AC side)?
used, but welding is normal.
	Defective wiring?	Repair wiring.
	Defective field controller?	Replace 'Field Controller'.
	Defective engine regulator?	Replace regulator.
Battery discharges too soon.	Defective wiring?	Repair wiring.
	Defective ignition switch?	Replace ignition switch.

BLW-400SSW-WELDER/AC GENERATOR— PARTS & OPERATION MANUAL— REV. #1 (06/15/01) — PAGE 45