Robertshaw Smart Sense Series Installation Manual page 57

Symptom
Some buttons
do not appear to
operate. Padlock
is show on LCD.
Cannot enter
heat or cool
modes.
Cannot set
heating and
cooling to desired
value. Padlock
symbol flashes.
Outside Air
Temperature
display is showing
dashes.
HEAT or COOL is
flashing in the
LCD. Heating or
cooling has not
started.
Problem
Keyboard lock is ON.
Thermostat set for Heating or
cooling only modes.
This is not a fault.
Outside air temperature air
sensor has failed.
No outside air sensor fitted.
This is not a fault. Heating or
cooling will start shortly.
Solution
LC = XX value in
Installer Menu
values, see page 25.
Heating or cooling mode not
available on your system.
HL = XX (heating setpoint limit)
and CL = XX (cooling setpoint
limit) restrict control range. See
page 26.
Check wiring and outside air
sensor.
Replace outside air sensor.
Change TT = AO to TT = RS in
Advanced Installer Menu.
Anti-cycle delay in progress. This
can be disabled if required for
commissioning. See page 20.
57
Advanced
set the lock