NOTE - Always turn the main power switch OFF before connecting the machine to a power source. If
the machine is plugged in with the main power switch ON and the head adjusting motor operating, the
primary transformer fuses may blow. This is due to the high magnetizing in-rush current of the
transformer added to the reflected starting load of the motor
.
3.4 POWER PHASING
As with all three-phase motors, the phase sequence of the incoming power determines the direction of
rotation of the motor in the Tenderizer. Although the vertical reciprocating motion of the Tenderizer head
is unaffected by the rotational direction of the motor, if the motor was to operate backwards, the drive to
the conveyor would occur when the blades were partially down. Under these conditions, the conveyor
would attempt to move with the blades still inserted in the product. To prevent this from happening, a
phase sensor is incorporated in the electrical system to prevent the main motor’s starter from being
energized unless the incoming power is correctly phased.
After the Tenderizer has been set up and made ready to operate, the phasing of the incoming power
should be checked. Plug the power cord into the receptacle provided and pull the main power switch out
to the ON position. With the guard completely closed, press the START button. If the machine starts
and continues to operate, the phasing of the incoming power is correct and no further changes are
necessary. However, if when pressing the START button nothing happens, the phasing of the incoming
power may be incorrect.
To correct the phasing, two of the conductors in the power cord must be interchanged. If a separate
branch circuit disconnect box is provided for the Tenderizer, then it would be best to interchange two of
the wires inside the box; however, if the same circuit is used for other machines that are phase sensitive,
then the correction will have to be made in the plug cap on the Tenderizer’s line cord. Disassemble the
plug cap and interchange any two of the main conductors (black, white, or red wires). Do NOT change
the position of the GREEN wire; this is the ground wire and connects directly to the cabinet of the
Tenderizer. Connecting this wire to any other position in the plug cap would result in the Tenderizer
cabinet being electrically “hot” with respect to the building ground, an extremely dangerous condition.
After correcting the phasing of the incoming power, check the operation of the Tenderizer again. If it still
fails to operate, refer to the TROUBLESHOOTING section of this manual
MN700-MC0010
3-3
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