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La Crosse Technology, Ltd.                     www.lacrossetechnology.com/support 

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Batteries 

 

Explanation:

 Many problems are resolved with fresh batteries of the appropriate voltage. Many items 

sent in under warranty work when tested with fresh batteries. Batteries manufactured this year will have 
an expiration date 10 years (or more) in the future. Battery technology has improved and batteries will 
maintain voltage longer in storage. However, the environment the batteries reside in for the 10 years can 
deplete the power. 
 

  Use Alkaline or Lithium batteries in the 

outdoor sensors

  A minimum voltage of 1.48V for each battery is necessary for proper performance.   

  Use batteries dated at least six years in advance of the current year. Batteries dated earlier than six 

years from now may still work, but may be unstable in performance.   

  Good name brand batteries make less noise, which reduces the chance of RF (radio frequency) 

interference from the battery compartment.  

 

Power Requirements 

 

  2-AA 

batteries

 power the outdoor sensor.  

  We recommend Alkaline batteries for the outdoor sensor. 

  You may choose to use Lithium batteries for temperatures below -20°F/-28.8°C. 

 

Dashes show for Outdoor Temperature 

 

Explanation:

 Dashes mean the connection is lost between the projection alarm and the outdoor sensor.   

 

 

Batteries

 often resolve the connection. 

 

Distance/Resistance 

can cause loss of connection between the outdoor sensor and the projection 

alarm.  

  Turn the projection alarm 90 degrees towards the outdoor sensor to provide better reception. This 

allows more antenna surface to face the outdoor sensor signal.  

  Try the 

quick connect 

or 

factory restart.

 

 

Inaccurate Outdoor Temperature Reading 

 

Explanation: 

High outdoor temperature readings are generally a location issue. Low outdoor temperature 

readings are power related or a sensors going bad. 
 

  The outdoor sensor reads the environment where it is mounted. When mounted inside the home, it 

will read inside temperature. 

  When the outdoor sensor reads high during the day, but not at night, it is a 

positioning

 problem. 

  Look for heat sources such as sunlight, door or window frames or reflected heat. 

 

Side-by-side test:

 Bring the outdoor sensor in the house and place it next to the projection alarm for 2 

hours.  

  Compare indoor and outdoor temperature. The temperatures should be within 4 degrees to be within 

tolerance.  

  If the outdoor sensor reads correctly when next to the projection alarm, try a different location outside.  

 

Intermittent Outdoor Temperature 

 

Explanation: 

Intermittent problems are the hardest to resolve. RF (radio frequency) communication may 

come and go occasionally. This can be normal in some environments (e.g. moister climates). If outdoor 
sensor signal is lost, please wait 2-4 hours for the signal to reconnect on its own.  
 

  Move the outdoor sensor to a closer location. 

 

Distance/Resistance 

can cause loss of outdoor sensor signal.  

  Check 

Batteries.

 

 

Summary of Contents for T83721

Page 1: ...ttent Outdoor Temperature 3 Outdoor Temperature is stuck or HH H LL L 4 Outdoor sensor drains batteries quickly 4 Outdoor sensor fell The sensor no longer works 4 Mounting Positioning Outdoor sensor 4...

Page 2: ...hen RF connection is established the temperature will appear on the station Allow the outdoor sensor and projection alarm to sit together for 15 minutes to establish a strong connection 10 Do not pres...

Page 3: ...can cause loss of connection between the outdoor sensor and the projection alarm Turn the projection alarm 90 degrees towards the outdoor sensor to provide better reception This allows more antenna s...

Page 4: ...etween the outdoor sensor and projection alarm Outdoor sensors at the end of the range may work while batteries are fresh but not after they drain a bit Check for leaking batteries which may damage th...

Page 5: ...hten Position Projection Alarm The projection alarm has a wide base to sit on a desk or table Place within range of the outdoor sensor The maximum transmitting range in open air is 200 feet 60 meters...

Page 6: ...stuck Indoor Temperature 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 Batterie...

Page 7: ...DST will flash and the word ON Press and release the TEMP or TIME button to turn this to OFF if you do not observe DST Confirm with the SET F C button and move to the next item 4 12 24 HOUR TIME 12H...

Page 8: ...sed for charging Make sure that the USB cable you use will charge your device Most USB cables included with mobile devices will work for charging Note Many devices may require more power to charge tha...

Page 9: ...moon shown against a light colored background the phases will show opposite to a paper calendar The segments that are highlighted portray the part of the moon that is lit For instance the moon will b...

Page 10: ...ection alarm is blank No letters numbers or dashed lines Check that the batteries are installed correctly Batteries may be overpowered or underpowered Remove batteries from projection alarm Press any...

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