21While an error code appears in the display, all buttonsare inoperable except the SELECT button. SELECTremains operational so the service person can per-form the Manual Advance Diagnostics, see below, tofurther isolate the problem.Procedure for removing error code from dis-play:1. Unplug power supply from electrical outlet.2. Correct problem.3. Plug power supply back in.4. Wait 8 minutes. The error code will return ifthe problem was not corrected.MANUAL ADVANCE DIAGNOSTICSUse the following procedures to advance the watersoftener through the regeneration cycles to checkoperation.Remove the top cover to expose the valve and ob-serve cam and switch operation during valve rotation.1. Press and hold SELECT for 3 seconds until “000”shows in the display, then release.2. The 3 digits indicate water meter operation as fol-lows:000 (steady) = Soft water not in use, and no flowthrough the meter.Open a nearby soft water faucet.000 to 199 (continual) = Repeats for each gallonof water passing throughthe meter.3. The letter “P” and a dash (or dashes) indicatePOSITION switch operation (See Figure 45). If the4. Use the RECHARGE button to manually advancethe valve into each cycle and check correct switchoperation.NOTE: Be sure water is in contact with the salt, andnot separated by a salt bridge (See "BreakingA Salt Bridge" section).5. While in this diagnostic screen, the following infor-mation is available and may be beneficial for vari-ous reasons. This information is retained by thecomputer from the first time electrical power isapplied to the electronic controller.a. Press the p UP button to display the number ofdays this electronic control has had electricalpower applied.b. Press the q DOWN button to display the numberof regenerations initiated by this electronic con-trol since the code number was entered.6. Press and hold the SELECT button until the modelcode (“o30” for Model EP100 or “o40” for ModelEP200) shows in the display. This code identifiesthe softener model. If an incorrect model code isdisplayed, the softener will operate on incorrectconfiguration data.7. To change the code number, press the p UP orq DOWN button until the correct code shows.8. To return to the present time display, press theSELECT button.WaterMeterSwitchAUTOMATIC ELECTRONIC DIAGNOSTICSThis water softener has a self-diagnostic function forthe electrical system (except input power and/or watermeter). The water softener monitors electronic com-ponents and circuits for correct operation. If a mal-function occurs, an error code appears in the display.FIG. 44FIG. 45letter appears, the switch is closed. If the dashshows, the switch is open.TroubleshootingFIG. 46