Carrier NDK33BN0KB, Operation & Service Manual

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1. Switch Board
2. Indicator lights
3. Display
4. MessageCenter
5. Keypad
6. Up and Down Arrow Keys
7. Enter Key
8. Manual Defrost Key
9. Alarm List Key
10. Start/Stop-Continuous Key
11. Select Key
12. Start/Run-Off Switch (SROS)
13. Standby/Engine Switch
14. Language Switch
Figure 2-5. Display And Keypad
b. Display MessageCenter & Keypad (see figure
Figure 2-6)
Indicator Lights
The display has six LEDs across the top to indicate
operational status. These indicators are:

Heat Indicator (Amber) - Illuminated when the unit
is in Heat Mode.

Cool Indicator (Green) - Illuminated when the unit is
in Cool Mode.

Defrost Indicator (Amber) - Illuminated when the
unit is in Defrost Mode.

Alarm Indicator (Red) - Off or Flashes at a rate of
0.5 seconds.

Start-Stop Indicator (Green) - Illuminated when
Start-Stop Operation has been selected.

Continuous Indicator (Green) - Illuminated when
Continuous Operation has been selected.
NOTE
When the unit is in Null mode (fan only), the
mode indicators (cool, heat and defrost) are all
off.
NOTE
There is an opening between the Alarm and
Start-Stop LEDs that is not used at this time.
Display
The display has 9 characters (7 seven-segment char-
acters and 2 nine-segment characters), 2 commas
(decimal points for English units), and a degree sym-
bol. The display is used to provide the user setpoint
and refrigerated compartment temperatures, either in
degrees Centigrade or Fahrenheit.
Temperature display is right justified, with unused dig-
its blank. A negative sign will be displayed for all set-
point and compartment temperatures below zero.
Message Center
Messages generated by the microprocessor are dis-
played in the MessageCenter. Details of the messages
are described in Section 6.1 MessageCenter.