Frymaster 47 Series Service & Parts Manual page 36

1.9.7 Modular Basket Lift Malfunctions (cont.)
Computer/Controller
Modular Basket Lift Simplified Schematic
H
N.O. Upper Limit
Microswitch
5
1 or 4
Basket Lift
N.C. Lower Limit
3 Relay
Microswitch
To computer/controller
via interface board
When the timer times out, power is supplied to the opposite pole of the motor, through the upper
microswitch. The motor drives the rod upward until it loses contact with the upper microswitch,
cutting power to the motor and stopping the lift.
In units configured for Basket Lift Timer Controllers or Computer Magic III computers, the process
is almost identical. The difference is that the push button mechanical timer is replaced with timing
circuitry in the computer or controller. The operator programs specific cook times (and other
settings) into the computer/controller. When the product button is pressed, the timing circuitry
activates a coil in the basket lift relay to supply power to the lower microswitch. As with the
manually controlled units, the microswitch stops the motor at the lift's upper and lower travel limits
and reverses the direction of current flow thus reversing the motor direction.
Problems with the basket lift system can be grouped into three categories:
• Binding/jamming problems
• Motor and gear problems
• Electronics problems
Binding/Jamming Problems
Noisy, jerky or erratic movement of the lifts is usually due to lack of lubrication of the rods and their
bushings. Apply a light coat of Lubriplate™ or similar lightweight white grease to the rod and
bushings to correct the problem.
Another possible cause of binding is improper positioning of the motor, which prevents the gear
from correctly engaging the teeth in the rod. To correct the problem, loosen the screws that hold the
motor in place and move it forward or backward until the rod has just enough slack to be rotated
slightly.
47 SERIES GAS FRYERS
CHAPTER 1: SERVICE PROCEDURES
N
M
6
1-31
Manual (Push-Button)
Modular Basket Lift Simplified Schematic
2-Pole
H
Mech
Timer
N.O. Upper Limit
Microswitch
1 or 5
4 or 6
N.C. Lower Limit
Microswitch
N
M
3