Power Up; Setting Mode Operation; Off Mode; Auto, Heat, Cool And Dry Modes - Carrier 33MC-URC Owner's Manual

Normal Operation

POWER UP

All segments of the LCD should be energized for five seconds. The
mode, fan, louver, desired temperature and configuration
information should be read from the EEPROM. If the EEPROM
values are not valid, the following should be used as defaults:
Operating Mode = . . . . . . . . . . . . . . . . . . . . . . . . . .
Fan Speed = . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Desired Temperature = . . . . . . . . . . . . . . . . . . . . . . . .
_F or _C = . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Louver = . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Room Thermistor Override =
Cooling only vs Heat/Cool Remote =
When switched on, the control display appears.

Setting Mode Operation

Pressing the "MODE" button will cause the mode to change. The
"MODE" button must be released and then pressed again in order
to change to the next mode.
The active mode will always be lit in normal operation.
Available modes to select are:
Heat/Cool Remote:
OFF, COOL, DRY,
Cooling Only Remote:
COOL,
OFF,
When the "MODE" button is not pressed for 15 seconds, the next
press will always switch the mode to OFF.

OFF Mode:

ICONS Energized
S OFF Mode
S Room Temperature if configured for Room Thermistor
Override, otherwise nothing
Buttons available:
S "MODE" button
AUTO
AUTO
72_F
F
AUTO
. . . . . . . . . . . . . . . . . . OFF
. . . . . . . . Heat/Cool
FAN ONLY, AUTO, HEAT
DRY, FAN ONLY

AUTO, HEAT, COOL and DRY Modes:

ICONS Energized:
S Operation Mode ICON.
S Room Temperature if configured for Room Thermistor
Override (operated by Room Controller), otherwise user
selected temperature with the "SET TEMP" Icon.
S FAN/LOUVER Icon with the user selected Fan and
Louver
Buttons available:
S All buttons are available
AUTO Automatic operation
NOTE: The compressor and electric heater must be off for at least
30 Minutes, this time being necessary to pass from Heating to
Cooling, or Cooling to Heating. This will prevent the system from
switching between Heating and Cooling continuously.
COOL Cooling operation
DRY Drying operation.
HEAT Heating operation.
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