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Heat Controller SERVICE MANUAL Packaged Terminal A/C
20
KEYPAD CONFIGURATION
Allows further conguration of system to desired application such as whether th unit displays in °F or °C, whether the display
shows the set point or room air temperature, and to set controls for sensor biasing. Changes do not take affect until power is
cycled on the unit.
To enter Keypad conguration
Cycle power to unit. Press and hold the Fan Speed Button and the COOLER button for 5 continuous seconds, within 30
seconds of the unit being powered up. If the unit has had power for more than 30 continuous seconds, keypad conguration
cannot be entered. When keypad conguration mode is rst entered, it will default to Fahrenheit/ Celsius Display Mode.
To scroll through the Keypad Conguration Options
Press and release the Fan Speed button. The stored value will be displayed.
To modify conguration settings
Press and release the Setpoint Up or Setpoint Down buttons.
To exit Keypad Conguration
Keypad Conguration will end on its own 30 seconds after the last button is pressed or when the MODE button on the Key-
pad is pressed.
In the conguration mode, four different options can be selected by using the fan speed button. The options are described below:
Fahrenheit/ Celsius Display Switch:
Changes between degrees Fahrenheit and Celsius on the display. An “F” indicates Fahrenheit and ‘C’ indicates Celsius. De-
fault is degrees “F”.
Indoor Air Temperature Sensor Biasing for Cooling mode:
Sometimes known as an anticipator, the air temperature sensor bias is used to adjust the room air temperature reading in
cooling mode. (Not normally required.)
Indoor Air Temperature Sensor Biasing for Heating mode:
Sometimes known as an anticipator, the air temperature sensor bias is used to adjust the room air
temperature reading in heating mode. (Not normally required.)
Indoor Temperature Display:
Change between showing setpoint only on the display during heating and cooling modes “SP” or displaying
room temperature during heating and cooling modes “AA”. (“SP” mode is the default mode.)
If “SP” is selected, only the setpoint will be displayed during heating and cooling modes, regardless of what the real
temperature is in the room.
If “AA” mode is selected, the room temperature will be displayed during heating, cooling and fan only modes.
— If the mode button has been changed to either heating or cooling modes, setpoint will be displayed for 10 sec-
onds. After the 10 seconds, the room temperature will again be displayed.
— If the on/off button is pressed (when the unit is off) and the last mode was either cooling or heating, the setpoint
will be displayed for 10 seconds before displaying room temperature.
— During heating and cooling modes, if either the up or down setpoint key is pressed, the display will show the
setpoint until 10 seconds after the last up or down key is pressed. Then the room temperature will be displayed
again.
To restore factory setting
During standby of OFF mode, press fan speed and UP buttons simutaniously for 3 seconds. The display will show “00” for 3
seconds.