8. With the correct model code displayed, press the SELECT
button several times, until a flashing “12:00 AM” and
“PRESENT TIME” show in the display.
9. Press the
UP or
DOWN buttons to set the present time.
Up moves the display ahead; down sets the time back. Be
sure AM or PM is correct.
NOTE: Press buttons and quickly release to slowly advance the
display. Hold the buttons down for fast advance.
10. Press the SELECT button a few times, until the time
appears on the display, but is not flashing.
11. For information about programming additional features of
the softener, consult your owner’s manual.
12. If the valve is not in Service position, press the RECHARGE
button and hold for 3 seconds to start a recharge cycle.
The display will flash “RECHARGE NOW.” In about 2 hours
the recharge cycle will be complete and the valve and elec-
tronic control board will be properly oriented together.
NOTE: To save time, use the manual advance procedures to
properly time and check operation. See service infor-
mation in the manual.
IMPORTANT: BE SURE THE VALVE CAM INDICATES “SERVICE”
POSITION (See Figure 1) WHEN REPLACING THE ELECTRONIC
CONTROL BOARD (PWA), TO ASSURE BOTH VALVE AND PWA
ARE ORIENTED, OR TIMED, TO THE SAME CYCLE. If the valve is
not in Service position, see step 12 below.
NOTE: When installing the electronic control board (PWA) on the
faceplate, use care not to twist the circuit board, or force it onto the
mounting pegs. Twisting could damage the printed circuits, or break
the display glass.
Model Number
Model Code
to select
MSD45E A45
1. Unplug the water softener’s transformer from electrical power.
2. Remove the faceplate cover to expose the valve.
3. Unplug the wiring connections from the back of the old
Electronic Control Board (See Figure 2).
4. Carefully remove the old board by unsnapping it from its
retainer tabs.
5. Carefully snap the new Electronic Control Board into the
retainer tabs.
6. Reconnect the wiring to the new board (See Figure 2).
7. Plug the transformer into the electrical outlet. A test number
shows in the display for a few seconds.
NOTE: If “A - - -” is flashing in the display, press the
UP or
DOWN button to set the model code.
ELECTRONIC CONTROL BOARD (PWA) REPLACEMENT
7310977 (Rev. A 5/7/09)
Figure 2
Trans-
former
Back of Electronic
Control Board
Valve
Motor
Turbine
Sensor
Valve Position
Switch
Figure 3
UP
button
Display
DOWN
button
DATA button
RECHARGE
button
Position markers
(valve in service)
CAM
MOTOR
Figure 1
SELECT
button
