Troubleshooting, Trouble Probable Cause Remedy

Troubleshooting

Motor

NOTE: Motors used on wood-working tools are particularly susceptible to the accumulation of sawdust and wood chips and should be blown out or “vacuumed” frequently to prevent interference with normal motor ventilation and proper operation of the centrifugally-operated starting switch.

Trouble		Probable Cause		Remedy


Excessive noise	1. Motor		1.	Have motor checked by qualified service tech-
				nician. Repair service is available your nearest
				Authorized Service Center store.

Motor fails to develop full	1.	Circuit overloaded with light,	1.	Do not use other appliances or motors on
power. Note Low Voltage:		appliances and other motors.		same circuit when using the saw.
Power output of motor	2.	Undersize wires or circuit too	2.	Increase wire sizes, or reduce length of wiring.
decreases rapidly with		long.		See “Motor specifications and Electrical
decrease in voltage at	3.	General overloading of power		Requirements” section.
motor terminals. For		company facilities.	3.	Request a voltage check from the power com-
example, a reduction of				pany.
10% in voltage causes a
reduction of 19% in maxi-
mum power output of
which the motor is capa-
ble, and a reduction of
20% in voltage causes a
reduction of 36% in maxi-
mum power output

Motor starts slowly or fails	1.	Low voltage.	1.	Request voltage check from the power com-
to come up to full speed.				pany. Check size of circuit wiring.
	2.	Windings burned out or open.	2.	Have motor repair or replaced.
	3.	Starting switch not operating.	3.	Blow out sawdust from motor. Have motor
				repaired.

Motor overheats	1.	Motor overloaded.	1.	Feed work slower into blade.
	2.	Improper cooling (air circula-	2.	Clean out sawdust to provide normal air circu-
		tion restricted through motor		lation through motor. See “Maintenance” sec-
		due to sawdust accumulation).		tion.

Starting switch in motor	1. Burned switch contacts (due to		1.	Have switch replaced and request a voltage
will not operate.		extended hold-in periods		check from the power company.
		caused by low line voltage,
		etc.)
	2.	Shorted capacitor.	2.	Have capacitor tested and replace if defective.
	3.	Loose or broken connections.	3.	Have wiring checked and repaired.

Motor stalls (resulting in	1.	Starting switch not operating.	1.	Have switch replaced.
blown fuses or tripped cir-	2. Voltage too low to permit motor		2.	Request voltage check from the power com-
cuit breakers).		to reach operating speed.		pany.
	3.	Fuses or circuit breakers do	3.	Install proper size fuses or circuit breakers.
		not have sufficient capacity.

Frequent opening of fuses	1.	Motor overloaded.	1.	Feed work slower into blade.
or circuit breakers.	2.	Fuses or circuit breakers do	2.	Install proper size fuses or circuit breakers.
		not have sufficient capacity.		Check that wiring will handle load.
	3.	Starting switch not operating	3.	Have switch replaced. Blow out sawdust.
		(motor does not reach speed).