ELECTRONIC CONTROL BOARD (PWA) REPLACEMENT
7323899 (Rev. B 9/10/13)
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 face-
plate, use care not to twist the circuit board, or force it onto the mounting
pegs. Twisting could damage the printed circuits, or break the LED glass.
Notes for Air Inject Filters:
If your system includes AC solenoid valve P/N 7287645 (valve coil will be pink),
you must replace it with DC solenoid valve P/N 7322699 when replacing the PWA.
If your system includes relay box P/N 7276050 (P/N is printed on the relay box),
you must replace it with relay box P/N 7322681 when replacing the PWA.
Position markers
(valve in service)
CAM
MOTOR
Figure 1
1. Unplug the water filter’s transformer from electrical power.
2. Remove the water filter’s top cover to expose the valve.
3. Unplug the wiring connections from the back of the old
Electronic Control Board.
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.
7. Plug the transformer into the electrical outlet. A model code
(example: “HPF”) and test number shows in the display for a
few seconds.
NOTE: If “- - - -” is flashing in the display, use the
r UP or
s DOWN buttons to set the model code.
8. If the correct model code for your filter model did not display
when the transformer was first plugged in, set the model
code as follows: Press and hold the SELECT button until
“000 - -” shows. Then press and hold SELECT again until a
model code shows.
9. Use the
r UP or s DOWN buttons to set the correct model
code for your filter (See table at right). Then, press the
SELECT button to set, and change to the flashing
“PRESENT TIME" display.
10. Press the r UP or s DOWN buttons to set the present
time. Up moves the display ahead; down sets the time
back.
11. Press the SELECT button a few times, until the time appears
on the display, but is not flashing.
12. Program additional water filter features, following instructions
in your owner’s manual.
13. If the valve is not in Service position, press the TOUCH/HOLD
button and hold for 3 seconds to start a recharge cycle. The
filter cycles through the recharge positions during the next
30 minutes. After this the electronic controller and valve are
properly oriented together.
NOTE: To save time, use the “manual advance” procedures to
properly time and check operation. See “Trouble shooting”
section of the filter manual.
Water Filter Models
Model Code
to Set
NSSFSSA, NSANSSA,
NSTOFSSA, NSAPFSSA,
NSAPFXLA, NSCCTOSSA
HPF
NS AIIFSS-110, NS AIIFSS-220,
NS AIIF2
HAIIF
NSIFPPA, AIF10 HIF10
Universal Filter HPF
Universal Filter (12”) w/Brine Tank
or Potassium Permanganate Feeder
HIF12
Display
UP
button
DOWN
button
SELECT
button
TOUCH/HOLD
button
Figure 2
