Operation - Carrier 33CS Installation, Start-Up, And Operating Instructions Manual

5. Press the Program button to advance to the next time
period.
6. Perform Steps 2 through 5 until the times and tempera-
ture set points have been entered for the entire day.
Press the Change Day button to move to the schedule
for the next day.
7. Repeat Steps 2 through 6 to program the remaining
schedule days. The Copy Previous Day button can be
used to copy the previous day's schedule if the sched-
ules are the same.
8. After all the times and set points for each day have
been entered, press the End button to finish entering
the schedule.
NOTE: The thermostat will continue to follow the schedule
until a new one is entered. The schedule may need to be
updated for different seasons or prolonged changes in
temperature.
OVERRIDING THE SCHEDULE — The schedule can be
overridden in three ways, the Hold button can be pressed to
lock in the current temperature setting, the Up or Down but-
tons can be pressed to change the desired temperature or the
Occupied button can be pressed. The thermostat will use the
new set point until the next scheduled time period starts. Hold
is indefinite and will remain in effect until the Hold button is
pressed again.
The Occupied button is only active during unoccupied time
periods. When the Occupied button is pressed, the heating and
cooling set points change to the OC1 settings and remain active
until the next time period or until the number of override hours
expires, which ever happens first.
Step 11 — Final Checklist
1. Put away tools and instruments. Clean up debris and
packaging.
2. Review Owner's Guide with occupant or owner.
3. Leave Owner's Guide with occupant or owner.

OPERATION

Hold, Fan, and Mode Button Operation —
Pressing the Hold button disables the time and temperature
schedule and holds the current desired temperature set point.
When a Hold is active, the HOLD annunciator is displayed on
the thermostat screen. To release the Hold, press the Hold but-
ton a second time.
The Fan button selects fan operation. When the fan is set to
ON, the fan will run continuously. When the fan is set to AU-
TO, the fan will run during heating and cooling operation only.
If the fan is set to ON, but the Allow Continuous Fan Dur-
ing Unoccupied Hours configuration is set to OF, the fan will
not run during unoccupied hours when heating or cooling is not
active. A small triangle will be displayed next to the Fan On
icon to show the user that the fan is not running because of the
unoccupied time period.
The Mode button selects the operating mode of the thermo-
stat. If OFF is selected, the thermostat will not enter Heating or
Cooling mode. If HEAT is selected, the thermostat will only
enter Heating mode (if the room temperature is below the heat-
ing set point). If COOL is selected, the thermostat will only en-
ter Cooling mode (if the room temperature is above the cooling
set point). If AUTO is selected, the thermostat will enter Heat-
ing or Cooling mode based on the room temperature and the
heating and cooling set points. Heat pumps also have an
EHEAT selection. When DIP Switch B (Emergency Heat Se-
lection) is set to ON, the EHEAT mode is available on the ther-
mostat. If EHEAT is selected and there is a heating demand, the
thermostat will turn on the O/W2 output when the AC/HP DIP
Switch (A) is set to the AC position or O/W2 output when the
AC/HP DIP Switch (A) is set to the HP position. The annunci-
ator for each selection will be displayed on the thermostat
when selected.
Display Outdoor-Air or Leaving-Air Tempera-
ture —
When the Up and Down buttons are pressed at the
same time, the display will show the temperature of the sensor
wired to the thermostat at S1 and S2. The temperature is dis-
played for 4 seconds with the letters "od" or "LA." The display
then returns to normal. If a sensor is not connected, DIP Switch
C (Remote Room Sensor) is set to ON, or the reading is out of
range, then "--" is displayed.
The valid temperature range for the outdoor-air sensor is
–38 to 145 F. The valid temperature range for the leaving-air
sensor is –38 to 145 F.
Thermostat Output Assignments —
stat output assignments, based on configuration, are shown
in Table 4.
Five-Minute Compressor Short-Cycle Protec-
tion —
The timer prevents the compressor from starting until
it has been off for at least 5 minutes. The 5-minute timer can be
disabled (for one cycle only) by simultaneously pressing the
Fan button and the Up button.
Fifteen-Minute Staging Timer —
heating or cooling is used, the staging timer prevents any
higher stage from energizing until at least 15 minutes has
passed from the start of the previous stage. The timer is dis-
abled if the temperature demand is greater than 5 degrees.
Three-Minute Minimum On Time —
mal operation, when a stage is energized, it must remain on for
at least 3 minutes.
Heating/Cooling Set Point Minimum Differ-
ence —
A minimum difference of 3 degrees is enforced
between the heating and cooling set points. The thermostat will
not allow the set points to be set within 3 degrees of each other.
Auto-Changeover Timer —
over mode is selected, the thermostat will not change from
heating to cooling or cooling to heating until an opposite
demand has existed for a minimum of 10 minutes. The timer is
disabled if the heating or cooling set point is changed.
Power-On Thermostat Check —
applied to the thermostat, all possible display annunciators are
turned on for a few seconds. The thermostat then indicates the
current mode and configuration information with a 2-digit
code. The following codes can be displayed: A2 — two-stage
air conditioner, and H2 — two-stage heat pump.
Error Codes —
The thermostat will display the following
error codes if errors are detected:
-- — If the thermostat cannot properly read room temperature,
the thermostat will display an "--" and all outputs (except the
fan if on), will be deenergized.
E2 — If the AC line voltage drops below the minimum level,
all outputs are deenergized and the thermostat will display an
E2. The E2 error will remain until proper line voltage has been
restored for at least 15 seconds. If the line voltage is com-
pletely interrupted, the thermostat display will immediately go
blank
E3 — If the outdoor temperature sensor is in error, an E3 error
will be displayed.
E7 — If the L terminal on the thermostat is energized, the
compressor on the HVAC unit is locked out. An E7 error will
be displayed whenever the compressor is locked out.
11
The thermo-
When multi-stage
In nor-
When the auto-change-
When power is