Ramp, Sag, And Power Interruption; Electrical Discharge; Screen Locks Up Or Goes Blank - Lennox iComfort S30 Smart Thermostat Operating, Troubleshooting And Technical Cheat Sheet

4.2. Ramp, Sag, and Power interruption

Display (thermostat) will indicate error "unable to communicate with Smart Hub". This pop-up will be displayed for
three minutes which will cause the watchdog to reset the display after three minutes.
S
All will recover fine after the reset.
S
This whole process will take between 5 – 6 minutes.
S
During this test and sometimes also noticeable when manually un-powering and powering the Smart Hub during
test setups, dashes appear on the display instead of the ambient temperature reading. The dashes will remain
on the display for approximately two minutes. After the wait period has ended the display will recover fully.

4.3. Electrical Discharge

Display will indicate error "unable to communicate with Smart Hub". This pop up will be on the display for 3 minutes
which will cause the watchdog to reset the Display after three minutes. All will recover fine after the reset. This whole
process took between 5 – 6 minutes.

4.4. Screen Locks Up or Goes Blank

If the HD Display screen freezes or goes blank then perform a reset. Reset the display by pressing the RESET button
and holding it for 5-6 seconds or until screen goes blank if screen is on. The reset button is located at the top left hand
back side of the display. It is a very small button and is flush with the case.
NOTE: The reset button only reboots the HD Display. This action alone does not change any settings previously con­
figured for the system.
RESET BUTTON
FOR FUTURE USE
FOR FUTURE USE
SPEAKER
PROXIMITY SENSOR
- 13 -