Service TECH. Information 5A.TROUBLESHOOTING

SECTION 5

SERVICE TECH. INFORMATION

5A.TROUBLESHOOTING

AUTOMATIC ELECTRONIC DIAGNOSTICS

The faceplate timer (PWA) computer has a self-diag- nostic function for the electrical system, except for

input power and water meter. _,_

The computer monitors the elec- --,-- Err_

tronic components and circuits

for correct operation. If a mal- !

function occurs, an error code {

appears in the faceplate display. - - - -

The chart below shows the error codes that could appear, and the possible defects for each code.

While an error code appears in the display, all face

plate buttons are inoperable except the SELECT button. SELECT remains operational so the service person can make the MANUAL INITIATED ELEC- TRONIC DIAGNOSTICS (below) to further isolate the defect, and check the water meter.

POSSIBLE DEFECT

CODE

Err1

Err3

Err4

Err5

MOST LIKELYLESS LIKELY

motor inoperative / wiring harness or connection to switch / position switch / faceplate timer (PWA)

motor / faceplate timer (PWA)	See faceplate timer (PWA) replacement
timer (PWA) / position switch	on page 23.
ifaceplate timer (PWA)

PROCEDURE FOR REMOVING ERROR CODE FROM FACEPLATE: 1. Unplug transformer 2. Correct defect

3. Plug in transformer 4. Wait for 6 minutes. The error code will return if the defect was not corrected.

MANUAL INITIATED ELECTRONICS DIAG- NOSTICS

1.To enter diagnostics...

--from a error code display, press the #1 SELECT button.

--from a time display, press and hold the #1 SELECT button for 3 seconds.

You will see 1 of the following displays. All of the

displays show what position the valve is in, if the

turbine is operating, and the position switch open or closed status.

van _ _a_

VALVE iN SERVICE

POSITION

---'--;:-.-I

posi_onswish ind_

-8 .28

VALVEIN k RECHARGE

POSITION(FILL IN THIS

EXAMPLE)

lutt_c_e count

FosittonImttch indicalor

(o_n)

(F¢araBrae_a_h_ng)

I	_	minu_s of bd_ng _e
I_.----/t_ _lJS"t_ (_=_"-.
_--_,			POSITIONTO
i_..		water meW¢	ANOTHER (FROM
		uxtx_e counl	RLL TO BPJNINQ IN
posi_nswitchindicator			THISEXAMPLE)
(eked)

2.Press the ON/OFF-HOLD button to advance the valve to the next position. To verify component operation, or to possibly isolate a defect, observe the following.

POSITION SWITCH STATUS: With the valve in service, or any of the recharge cycles, the switch indicator will show open ---_--. While the valve is rotating from 1 position to another, the indicator will show the switch closed --"_. A defect is probable if indications vary from this pattern.

WATER METER TURBINE: With soft water in use, the turbine flow rate display continually repeats a 000 to 140 count for each gallon of water passing through the turbine. The display will remain a steady...000 if soft

water is not in use (open a nearby soft water faucet to check).

If you don't get a reading in the display, with faucet open, pull the sensor from the valve outlet port. Pass a small magnet back and forth in front of the sensor. You

SECTION 5