Built-in compressor protection
Damage can occur if the compressor is
restarted too soon after shutdown. This
feature forces the compressor to wait for a
few minutes before restarting.
During the wait time, the display will flash
the message Cool On (or Heat On if you
have a heat pump). When the safe wait time
has elapsed, the message stops flashing
and the compressor turns on.
System operation settings
1. Press Menu, and then press the Mode
(+) button to cycle to the next available
System mode.
2. Cycle through the modes until the
desired System mode is displayed, and
then press Done.
NOTE: Available System modes vary by
model and system settings.
System modes:
– Auto: Thermostat selects heating or cooling as needed.
– Heat: Thermostat controls only the heating system.
– Cool: Thermostat controls only the cooling system.
– Em heat (PSTSN21AWH only): For heat pumps with auxiliary heat.
Thermostat controls auxiliary heat. Compressor is not used.
– Off: Heating and cooling system is off. Fan will still operate if fan is set to
On.
NOTE: Heat On/Cool On may flash for 5 minutes due to compressor protection.
Fan operation settings
1. Press Menu, and then press the
Fan (-) button to cycle to the next
available Fan mode.
2. Cycle through the modes until the
desired Fan mode is displayed, then
press Done.
NOTE: Available Fan modes vary with
system settings.
Fan modes:
– Auto: Fan runs only when the
heating or cooling system is on.
– On: Fan is always on.
Message flashes until safe
restart time has elapsed.
2
M39423
M36808
M36827