Service Tech Information

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 elec- tronic components and circuits for correct operation. If a malfunction occurs, an error code appears in the face- plate display.

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

Error #1

Service Required

See Owner’s Manual

Diagnostics

FIG. 62

 

 

POSSIBLE DEFECT

 

 

 

 

 

 

 

CODE

MOST LIKELY

 

 

 

LESS LIKELY

 

 

 

 

 

 

 

 

 

Err1, Err3, Err4

motor inoperative / wiring harness or connection to switch / position switch . valve defect causing high torque

 

 

 

 

Err5

faceplate timer (PWA)

 

 

 

 

 

 

 

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 ELECTRONIC DIAG- NOSTICS (below) to further isolate the defect, and check the water meter.

PROCEDURE FOR REMOVING ERROR CODE FROM FACEPLATE:

Unplug transformer from outlet.

Correct defect

Plug in transformer.

Wait for 8 minutes.

The error code will return if the defect was not corrected.

MANUAL INITIATED ELECTRONICS DIAGNOSTICS:

1.To enter diagnostics, press the SELECT button once to go to the Main Menu. Move the black bar to Service Mode and press Select. Move black bar to Diagnostics and press Select.

You will see the display, showing valve cycle position, position switch status (open or closed), and turbine operation.

TURBINE OPERATION: If no water is flowing through the softener, the turbine indicator displays 3 zeros. When water is flowing, a 000 to 140 count repeats for each gallon of water passing through the turbine. To check for positive operation of the turbine if zeros are shown, open a nearby soft water faucet and observe the turbine count. If you don't get a reading in the dis- play, with faucet open, pull the sensor from the valve outlet port. Pass a small magnet back and forth in front of the sensor. You should get a reading in the display. If you get a reading, unhook the in and out plumbing and check the turbine for binding.

valve position indicator

10 : 39 : 56 AM

 

 

10 : 39 : 56 AM

Pos: SERVICE 0 : 00

 

 

Pos: SERVICE 0 : 00

Req Pos: SERVICE

 

 

Req Pos: SERVICE

Motor: Off

 

 

 

Motor: Off

 

Trbn: 000

Gals: 0

 

 

Trbn: 126

Gals: 0

Days: 1

Rchgs: 0

 

 

Days: 1

Rchgs: 0

Last Rchg: 4

 

 

 

Last Rchg: 4

 

 

 

 

 

 

 

 

position switch

 

 

 

indicator (open)

 

turbine count (no

 

 

 

turbine count

water flowing)

 

 

 

(water flowing)

FIG. 63

Questions? Call The Kenmore Water Line 1-800-426-9345

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Kenmore 420 Series warranty Procedure for Removing Error Code from Faceplate, Possible Defect Code

420 Series specifications

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