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Automatic Electronic Diagnostics
The faceplate has a self-diagnostic function for the electrical system (except input power). The faceplate monitors electronic components and circuits for correct operation. If a malfunction occurs, an error code appears in the faceplate display.
The Error Code Chart shows the error codes that could appear, and the possible defects for each code.
While an error code appears in the display, all faceplate buttons are inoperable except the SET button. SET remains operational so the service person can perform the Manual Advance Diagnostics below to further isolate the defect. |
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Manual Advance Diagnostics
Use the following procedures to advance the unit through the regeneration cycles to check operation.
Remove the faceplate cover to observe cam and switch operation during valve rotation. DISPLAY MUST SHOW TIME AND DAY.
- Press and hold the
(Set / Clear) button for 3 seconds until 18:88 shows in the display.

- Press the
(Recharge Day) button to display the position switch open or closed indicator.
- The letter P and a dash or dashes indicate position switch operation. The letter shows if the switch is closed. A dash shows when the switch is open.

NOTE: The position switch is closed when the plunger is depressed, open when extended.
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CORRECT SWITCH DISPLAYS
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VALVE CYCLE STATUS
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- -
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Valve in soft water, backwash or fast rinse position.
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- P
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Valve rotating from one position to another.
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- Press the
(VAC/RCHG) button to move the valve into fast rinse position. Again, look for a fast flow of water from the drain hose. Allow the unit to rinse for several minutes to flush out any brine that may remain from the brining cycle test.
- To return the valve to soft water position, press the
(VAC/RCHG) button once again.
- Press the
(Recharge Day) button to display 18:88.
- Press the
(Set / Clear) button to return the present time.
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