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TIMER for MODEL JV24
DISHWASHERS
GENERAL DESCRIPTION
The timer is a self-contained (frame mounted) timer of the repeating cycle type. It is mounted on the
control panel of Jackson Automatic Dishwashing machines, to control the automatic functions of these
machines. It consists of a clock motor which operates on 60 cycle, AC, 110VAC. In addition to the clock
motor, the timer also contains a driven cam arrangement which operates three micro switches.
PRINCIPLE OF OPERATION
The timer controls various operations of the automatic washers as per wiring diagram for each machine,
however, the timing cycle and the micro switches are the same for each model. The time for ONE COMPLETE
REVOLUTION of the cam shaft is approximately 300 seconds allowing two wash and two rinse operations for
complete revolution of the cam shaft. The micro switch nearest the timer motor is the hold circuit and
uses both the NO and NC contacts. The middle micro switch controls the wash and uses the NO contact.
Toe micro switch farthest away from the timer motor controls the rinse and uses just the NC contact.
SERVICE INSTRUCTIONS
CAUTION:
Always remove the power to the machine before working on the control panel
or while servicing the components on the switch panel. All electrical checks
should be mace by qualified personnel.
The: ooeration can be observed after removing the machine's kick;:are by loosening the two screws
If -. ;$ determined that the timer is.defective, it is recommended the:
-lie: :;e.c maintenance can be accomplished as follows:
new timer be installed. However.
A frozen contact on a micro switch will be indicated by one function .eing executed all the time or ins
roe
a click when the switch arm is actuated. The micro switch :s -enlaced by:
= e-:ve all wires from the timer, properly tag them to assure pr
Remove the two screws which hold the timer to the control pan'
R*e screw holds the micro switches, cams and actuating arms
s,;e opposite the motor. Remove this screw. NOTE: 5? sure
-
switch. Cam nearest timer motor has 1 2 raised, cam ce
fr: — timer motor, smallest oepresseo areas.
T-e unit can new be taken apart anc the defective micro
:eassembie. NOTE: The flanges on the cams are soon
switc
nat:
- replacement.
:he frame. This screw is seen on the
note which cam goes with which
'. larger depressed areas, cam furthest
laced.
cniy mesh in one aireelicn.
or
*■; • -i-s cam drive system is ecuipoe: with a clutcn to erapie
-es. Remo/e power to machine BEFORE touching timer.
.- one direction only. Do net force them. As tarns actuate
test the switches with an ohmmeter.
one t: view the operations of :.*e cams ana
Relate cams by turning with fingers; cams
sw.;:nes, listen for the 'dick' ;; the switch
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