Frymaster H17 - Manual (Page 22)

1-18
Simplified Schematic
M
H N
Normally Closed Lower-limit
Microswitch
6
To computer/controller via
interface board
Basket Lift
Relay
3
1 or 4
5
Normally Open Upper-limit
Microswitch
When the product button is pushed on the computer/controller, current flows through a coil
in the basket lift relay, causing the lower circuit to be activated. The basket lift lowers,
closing the normally open upper-micro-switch. When the lower normally closed micro-
switch is opened by the downward moving lift rod, power to the motor ceases to flow.
When the computer/controller times-out, the current to the relay coil is cut, allowing the
upper circuit to be activated. The basket lift then raises and re-closes the lower micro-
switch. When the basket lift rod clears the upper micro-switch, the micro-switch reopens
and power to the circuit is cut and the motor stops. Pushing the product button restarts the
cycle.
Problems with the modular basket lift design can be grouped into three categories:
● Binding/jamming problems
● Motor and gear problems
● Electronics problems