Ridgid R4331 Operation Manual - Page 8

ELECTRICAL MOTOR safety protection This motor should be blown out or vacuumed frequently to prevent sawdust buildup which can interfere with normal motor ventilation.  Connect this tool to a power source with the appropriate voltage for your model and a 15-amp branch circuit with a 15-amp time delay fuse or circuit breaker. Using the wrong size fuse can damage the motor.  If the motor won't start, turn off the power switch immediately and unplug the tool. Check the cutter head to make sure it turns freely. If the head is free, try to start the motor again. If the motor still does not start, refer to the Troubleshooting section. Frequent "blowing" of fuses or tripping of circuit breakers may result if:  Improper or dull blades are used. NOTE: Do not continuously use the thickness planer set at maximum depth of cut (1/8 in.) or at full 13 in. width of cut. Continuous use at maximum cutting capacity will damage your motor.  Motor is overloaded. Overloading can occur if a workpiece is fed too rapidly or if the tool is misaligned.  Motor circuit is fused differently from recommendations. Always follow instructions for the proper fuse / breaker. Do not use a fuse/breaker of greater capacity without consulting a qualified electrician.  Low voltage. Although the motor is designed for operation on the voltage and frequency specified on the motor, normal loads will be handled safely on voltage no more than ten percent above or below that figure. Heavy loads, however, require that voltage at motor terminals equal the voltage specified on the motor. NOTE: Always check the connections, the load, and the supply circuit whenever the motor fails to perform satisfactorily. MOTOR OVERLOAD PROTECTOR See Figure 2, page 21. WARNING: To reduce the risk of serious personal injury from thrown objects or blade contact from unexpected starting, immediately turn off the tool if the protector stops the motor. Remove the switch key and allow the motor time to cool. This planer is equipped with a overload protector device which will automatically "trip" and cause the planer to shut down if the motor is overloaded due to continuous heavy cutting. The planer overload protector can only be reset manually by the user after the planer has been allowed to adequately cool. Allow 15-30 minutes. Should the overload protector "trip":  Turn switch OFF ( O ).  Raise carriage and remove board.  After 15-30 minutes, reset the overload protector by pushing the reset button on the top of the motor housing. An audible click will indicate the overload protector is reset. Once the button is reset, the tool may be started and operated as normal. NOTE: If the button won't click into place immediately, the motor is still too hot and must be allowed to cool.  If motor has cooled, button will remain in. 8