Carrier 69UG15 manual Alternating Current Generator

		REMEDY/
CONDITION	POSSIBLE CAUSE	REFERENCE
		SECTION
3.2 BATTERY CHARGER (SOLID STATE) (CONTINUED)
	Open input circuit breaker	Reset
	Charger is not receiving AC input	Using a voltme-
		ter, confirm
		charger is receiv-
		ing correct (230v)
		AC voltage. If not,
Charger does not charge		check input
		connections.
	Charger output is not connected to 12 volt battery	Check output
		wiring connec-
		tions to battery.
	Charger is bad	Replace
Low output voltage measured	Battery not connected to charger. It is normal to	Check charging
	measure 12 volts or less across charger output with	leads from
across charger output
	no battery connected	charger to battery
Reverse polarity connection to	Internal DC fuse blown and possible damage to	Replace
battery has caused charger to stop	current carrying components
charging
3.3 ALTERNATING CURRENT GENERATOR
	Loss of residual magnetism in exciter field	Section 4.5.2.a.
	Circuit breaker tripped	Check
	Open in stator windings	Section 4.5.4/
		Replace
No voltage	Open or short in rotating rectifiers	Section 4.5.1.c.
		Section 4.5.4/
	Short circuited
		Replace
	Open in alternator field	Section 4.5.4/
		Replace
	Shorted exciter armature	Section 4.5.4/
		Replace
	Low engine speed	Section 4.4.11
	Excessive load	Check
Low voltage	High resistance connections - connections are	Tighten
	warm or hot	Section 4.5.4/
	Shorted field
		Replace
	Fluctuating speed	Section 4.4.11
Fluctuating voltage (May be indi-	Irregular speed of engine	Engine Manual
	Loose terminal or load connections	Tighten
cated by flickering lights)
	Bad bearing causing uneven air gap	Section 4.5.1/
		4.5.3
High voltage	Excessive engine speed	Section 4.4.11

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