ECOWITT HP3501 - Troubleshooting Guide; Outdoor Sensor Not Reporting; Dashes (-) on the Display Console

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10 Troubleshooting Guide
Look through the following table and locate an issue or problem you are
experiencing in the left column and read possible solutions in the right
column.
Problem
Solution
Outdoor sensor not
reporting to
console
Dashes (--) on the
display console
Check that the outdoor transmission LED is flashing
normally. See Sensor reporting interval on Section
15.
If the batteries were recently (re)placed, check correct
polarity was used and/or reseat the batteries. If the
batteries are old, replace them.
If the LED is now flashing normally, proceed to the
next step. If it is not flashing and you have repeated
battery checks and placement, you may have a
defective unit.
Make sure you have fresh batteries in the display
console.
If the batteries may have been changed in the remote
and/or the console, and the console has not been
reset, the solution may be as simple as powering
cycling the console: remove both batteries and
external adapter for about 10 seconds and reconnect.
If you still have problems, bring the outdoor sensor to
a location about 10 ft. away from the console for
testing. Power cycle the console as described above.
Do not touch any buttons for several minutes to allow
the console to “discover” the outdoor sensor.
If the outdoor temperature and humidity are still
showing dashes (--) after several minutes, go to the
Sensor Type setup and re-register the sensors. If the
sensor properly syncs up, proceed to the next step
“Intermittent problems with outdoor sensor reception
on console.”