Jackson 100 B/PRB, Service Manual, Page: 28 / 55

WATER LEVEL CONTROL
(ELS)
(FOR RINSE TANK) P/N 0205000
FUNCTION
The Water Level Control device utilized on power rinse (PRB) models only, automatically maintains
the water level in the rinse tank. The rinse tank water level control is energized by the master switch. The
control is designed to sense when the proper water level is maintained. At this time. the relay in the clear
plastic case will activate, opening the normally closed circuit to the solenoid, which stops the water flow
to the rinse tank.
When water is removed from the tank by the rinse pump, the sensing probe will alert the water level
control by signal to deactivate and return the contact points on relay (in clear plastic case) to the normally
closed position, allowing power to be reapplied to the solenoid valve. Water will again flow into rinse tank
until proper level is reached and maintained.
CHECKOUT
NOTE: ALL ELECTRICAL CHECKS SHOULD BE MADE BY QUALIFIED SERVICE PERSONNEL
OR ELECTRICIAN.
If one of the following problems exist, this control should be checked out as shown below:
1. Water to rinse tank runs continually with the master switch on.
2. Water does not flow into rinse tank when required.
PROCEED WITH CHECKOUTS:
1. Remove power source to machine by moving breaker to "off" position.
2. Remove 4 screws holding control pane! to control box and fasten to control box on right side,
using 2 screws with backside of panel outward.
3. Locate the water level control for the rinse tank circuit (sketch below). Remove, mark. and insulate
for easy replacement wires going to letters C and H on control.
4. Reapply power and turn on master switch.
5. With insulated wired, connect jumper wire between terminals C and H (24 Volt system).
6. If relay (inside clear plastic case marked
"X" on drawing below) operates, then the water level
control action can be deemed operational, and other causes should be explored (see
troubleshooting section).
7. If relay doesn't operate, then check relay coil continuity. Replace relay or complete control, as
necessary.
8. Remove power source once again and replace wires removed in (3) to original terminals or new
control, if replacement was made.
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