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La Crosse Technology, Ltd  

Page 3 

 

Explanation: 

These symbols are error messages indication the indoor sensor is outside 

of its readable range. For indoor readings, this is generally a power related issue.  

 

 

This is generally a power related issue. 

 

Batteries

 may be overpowered or underpowered. Remove batteries from atomic 

digital clock.  

 

Press any button 20 times. Leave the digital clock unpowered for 1-2 hours.  

 

Insert fresh alkaline batteries with correct polarity.  

 

If the indoor temperature is still dashes or HHH, LLL, the digital clock may need 

replacement. 

 

Does the clock have a backlight? 

 

 

No, as this clock is battery operated there is no backlight. 

 

Time is off by hours 

 

 

Check to see if the 

WWVB

 Tower icon appears on the atomic digital clock. If not, the 

digital clock has not received a WWVB time signal in the past 24 hours.  

 

Reposition the digital clock with the front or back facing Colorado. 

 

Check that the 

Time Zone 

selected correctly reflects your location. Adjust the time 

zone in the 

Program Menu.

 

 

Check that the DST indicator is correct for your location (most areas observe DST so 

this should be ON). Adjust the DST indicator in the 

Program Menu.

 

 

Large buildings, metal roofed buildings and buildings or rooms full of electrical 

and/or radio equipment make it difficult to receive the WWVB time signal. 

 

Daylight Saving Time 

 

 

Dependent on your location, position of the clock in your home, and atmospheric 

interference, it may take up to 5 nights for the change from Daylight Savings Time 

to Standard Time and vice-versa to occur. 

 

Check for a 

WWVB

 Tower Icon showing on the atomic digital clock. The tower icon 

indicates you have received the WWVB signal from Ft Collins CO in the past 24 

hours.  

 

Check that the clock is in the correct 

Time Zone

.  

 

Check whether the DST indicator is ON or OFF. If the indicator is OFF the clock will 

not change. 

 

Check for fres

batteries

. Without proper batteries, the antenna will have a 

harder time picking up the signal.

 

 

Position the digital clock in a window (

with the front or back) facing Ft. Collins, 

Colorado and leave for up to five nights. If you do not have a window facing this 

direction, position the clock near an outside wall and point the unit in this general 

direction.  

 

Manually Set Time/Date: Program Menu 

 

Summary of Contents for M78786

Page 1: ...g Time 3 Manually Set Time Date Program Menu 3 No WWVB Tower Icon 5 Set Time Alarm 5 Activate Deactivate Time Alarm 5 Snooze Alarm 5 Indoor Comfort Statement 5 Digital clock has distorted or frozen display 5 Digital clock is blank No letters numbers or dashed lines 6 Day of the week is incorrect 6 Digital clock drains batteries quickly 6 Digital clock has missing segments 6 Batteries Explanation M...

Page 2: ...er from clock 2 Press one of the buttons on the clock at least 20 times to clear all memory 3 Verify that the clock is blank before proceeding there may be lines painted on the screen that will show when there is no power 4 Leave without power for 15 minutes very important 5 Insert fresh batteries into the clock Display Indoor Temperature or Seconds Press the MODE button to toggle between indoor t...

Page 3: ...ndicator is correct for your location most areas observe DST so this should be ON Adjust the DST indicator in the Program Menu Large buildings metal roofed buildings and buildings or rooms full of electrical and or radio equipment make it difficult to receive the WWVB time signal Daylight Saving Time Dependent on your location position of the clock in your home and atmospheric interference it may ...

Page 4: ...KT Alaska HAT Hawaiian 7 Press the MODE button to confirm and select Daylight Savings Time ON OFF 8 DST ON will show Press the or button to turn that OFF if you do not observe Daylight Saving Time 9 Press the MODE button to confirm and select 12 hour or 24 hour time format 10 FORMAT 12H will show Press the or button to select 24H 11 Press the MODE button to confirm and select the hour 12 HOUR will...

Page 5: ...arm The alarm icon clock will show when active Snooze Alarm When the alarm sounds Press and release the SNOOZE button to silence the alarm for 10 minutes The snooze icon Zz will flash Press and release any button except SNOOZE to silence the alarm for 24 hours This is a crescendo alarm It will sound for 2 minutes then shut off if no buttons are Press and released Indoor Comfort Statement The indoo...

Page 6: ... year setting in the program menu The day of the week sets automatically based on the setting of the year month and date Digital clock drains batteries quickly Test a new set of alkaline batteries Write down the date of installation and the voltage of the batteries When the batteries fail please note the date and voltage again This is helpful in determining the problem Check for leaking batteries ...

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