15
IMPORTANT: Titration can be inuenced by many factors
outside of the detergent controller PC board and cell/sensor.
Some of these factors that should be checked before
troubleshooting the controller board and/or cell/sensor
include:
a. Check that scrap trays are properly installed in the
wash tank. Missing scrap trays can produce exces-
produce varying conductivity readings.
b. Check the conductivity level of the incoming supply
water. The tank titration will vary directly with varying
water quality due to changes in mineral content or
varying TDS.
elements in the wash tank. Excessive AC power
noise from the heaters can effect conductivity
temperature compensation on the detergent con-
troller board to malfunction (S-2000 Only). (See
1. Check the power supply voltage on terminals #20 and
use an alternate power supply to the transformer.
2. If the S-2000 Sensor is used, temporarily remove the
brown wire from terminal #15 and readjust the titration
setting for operation.
3. Check for signs of moisture contamination on the de-
tergent controller board, such as green discoloration or
corrosion on terminal connections or whitish deposits
on the board. Ensure the GeoCenter unit is properly
IMPORTANT: Determine if wash tank concentration is
remaining constant. If it is, detergent over consumption
is due to excessive wash tank dilution (with fresh water),
or all of the detergent is not entering the wash tank (being
diverted to the overow, into the rinse or pre-wash tanks,
etc.)
A detergent dispenser control can only be responsible
for maintaining a consistent detergent concentration. If it
causes the wash tank detergent concentration to increase,
see appropriate symptom above.
1. Check for incoming power of 24 volts AC across terminals
1 and 2 on the Speed Control Board.
a. If no 24 volts AC, check high voltage to transformer.
b. If no high voltage, check power source and
connections.
c. If 24 volts at transformer, carefully check all wires and
connections to Speed Rinse Control P.C. Board.
9.6 Fluctuating titration.
9.7 Excessive detergent consumption.
9.8 Rinse Injector does not activate.
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