®
ELECTRONIC CONTROL BOARD (PWA) REPLACEMENT
7265261 (Rev. B 6/19/20)
9. With the correct model code displayed, press the
PROGRAM button. The electronic controller will restart,
briefly displaying the model code you set.
10. Press the r UP or s 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.
11. Press the PROGRAM button a few times, until the time
appears on the display, but is not flashing.
12. For information about programming additional features of
the softener, consult your owner’s manual.
13. 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.
Model
Number
Model Code
to select
WHES18 LE18
WHES20 LE20
WHES3T Lt30
6. Reconnect the wiring to the new board (See Figure 2).
7. Plug the power supply into the electrical outlet. A number
shows in the display for a few seconds, followed by a
flashing “- - - - -”.
NOTE: If “- - - - -” is not flashing in the display, press and hold
the PROGRAM button until a model code appears.
8. Use the r UP or s DOWN buttons to set the correct
model code for your softener (see table below).
Figure 1
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 13 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.
1. Unplug the system’s power supply.
2. Remove the top 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 unsnap-
ping it from its retainer tabs.
5. Carefully snap the new Electronic Control
Board into the retainer tabs.
WHES18 & WHES20
Valve
MOTOR
CAM
Position markers
(valve in service)
Position markers
(valve in service)
CAM
MOTOR
WHES3T
Valve
Figure 2
Power
Supply
Back of Electronic
Control Board
Valve
Motor
Turbine
Sensor
Valve Position
Switch
UP button
DOWN
button
Display
RECHARGE
button
PROGRAM
button
Figure 3
