Emerson Sensi ST75, Installation Manual

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15
SYMPTOM POSSIBLE CAUSE CORRECTIVE ACTION
No Cool 1. Thermostat not
set to Cool
2. Loose connection
to thermostat
or system
3. Cooling system
requires service
or thermostat
requires
replacement
1. Set thermostat to Cool.
2. Verify thermostat and system
wires are securely attached.
3. Diagnostic: Set Mode to Cool
and lower setpoint below room
temperature. Same procedures as
diagnostic for “No Heat” condition
except set the thermostat to Cool
and lower the setpoint below the
room temperature. There may be
up to a five minute delay before
the thermostat clicks in Cooling if
the AC Protection feature is on.
Heat, Cool
or Fan Runs
Constantly
Possible short in
wiring, thermostat,
heat, cool or
fan system
Check each wire connection
to verify they are not shorted
or touching other wires. Try
resetting the thermostat.
Thermostat
Display &
Thermometer
Disagree
Thermostat display
requires adjustment
Display can be ad/-5° using
the Temperature Offset in Sensi app.
Display is
Blank
The display could
be turned off of you
need a common
wire (c- wire)
Attach a common wire (c-wire)
or turn on the display.