Lennox 22V25, Installation And Setup Manual, Page: 21 / 28

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Table 3. Thermostat Smart Devices Alert Codes
Alert
ID
Priority Message Troubleshooting Clear Condition
70502 Service Soon
Sensor: {Custom
Sensor Name}: Internal
Fault
Unable to access internal data.
Cycle power to the Smart Room
Sensor (see
"Cycling Power for
Troubleshooting" on page 17 for
procedure)
After power cycle, wait for ten
(10) minutes for self-clearing
to take place, if condition is
not resolved then replace
Smart Sensor.
70503 Maintenance
Sensor: {Custom
Sensor Name}:
Low Battery - Change
Batteries Soon
Battery percent equal to or less
than 3%.
To clear, replace old AA
lithium batteries with new AA
lithium batteries.
70504 Maintenance
Sensor: {Custom
Sensor Name}: 1%
Battery - Change
Batteries
Battery percent equal to or less
than 1%.
To clear, replace old AA
lithium batteries with new AA
lithium batteries.