Nilfisk-ALTO SR1800C B-D Motor overheating SR 1800C B, User Manual, 3301481722006-06A

USER MANUAL

Motor overheating (SR 1800C B)

PROBLEM	CAUSE	REMEDY
Overload	Current to the motor	Subject the motor to less strain
Insufficient air flow	Check suction/delivery openings	Clean or change shields or caps
	Fan rotation	Replace fan
Wrong voltage	Low battery voltage	Recharge batteries
	Low voltage to motor terminals	Check connections for proper tightening
Bearings	Faulty or badly installed bearing	Change bearings or change at every repair
		operation
	Radial overload	Check stress and strain
	Dirt infiltration	Clean the motor inside
Winding heating	Armature with shorted blackened winding	Replace. Use only original spares. Do not
		rewind.
	High humidity	Clean and dry at 110°C
	Shorted coil or winding, blackened insulating	Replace. Use only original spares.
	material
	Loose inner connection	Check and tighten correctly
Commutator heating	Short-circuit between segments	Clean commutator and contact the
		manufacturer
	Poor contact or worn carbon brushes	Check or replace
	Improper carbon brush quality	Only original carbon brush and for 48 V
		voltages
	Excessive spring pressure	Recalibrate or change
	Dirty or damaged surface	Clean or rectify the commutator

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