Applies To

ST01 and EI600 Series In-Wall Timers with newer firmware that includes the countdown feature

Question / Problem

My timer shows dawn or dusk stuck at 12:00. How do I fix it?

Installation / Application Conditions

• Timer has newer firmware with the countdown feature
• Date and time are set
• LAT/LONG has been entered (or recently changed)

Step-by-Step Resolution

1. Enter SETUP
   • Press MODE until SETUP appears.
2. Go to LAT
   • Press ON/OFF until you see LAT.

3. Enter the Latitude

   Use + or - to enter the latitude in a format that includes the tenths digit (one digit after the decimal point), even though the decimal point is not shown on the display.

   U.S. Latitude	Enter As
   41.9° (Chicago)	419
   34.0° (Los Angeles)	340
   29.8° (Houston)	298
   47.6° (Seattle)	476

   Press ON/OFF to confirm.

4. Go to LONG
   • Press ON/OFF to advance to LONG.

5. Enter the Longitude

   Use + or - to enter the longitude in the same format as latitude, including the minus sign for west longitudes (all U.S. longitudes are negative).

   U.S. Longitude	Enter As
   -87.6° (Chicago)	-876
   -118.2° (Los Angeles)	-1182
   -95.4° (Houston)	-954
   -122.3° (Seattle)	-1223

   Press ON/OFF to confirm.

6. Review DAWN (optional adjustment)
   • Press ON/OFF to advance to DAWN. Use + or - to adjust the DAWN time if you want to tweak it.
7. Review DUSK (optional adjustment)
   • Press ON/OFF to advance to DUSK. Use + or - to adjust the DUSK time if you want to tweak it.
8. Return to AUTO or RAND
   • When complete, press MODE until you are back to AUTO or RAND.

Tips / Additional Notes

• If dawn or dusk still shows 12:00, repeat the steps and confirm LAT and LONG each include the tenths digit.
• DAWN and DUSK adjustments are offsets. For the most accurate astronomic times, confirm LAT/LONG first, then apply any desired tweaks.
• If you are unsure of your LAT/LONG, use a phone GPS app or an online map to confirm your location values before entering them.