Indicator; Control Interface; Off Interface - Liebert DM User Manual

36 Chapter 5 Precision Air Conditioner Controller
2. Press the ENTER button to highlight the input data field in the password interface.
3. Press the UP or DOWN button to change the current number.
4. Press the ENTER button to confirm the password and enter the Main Menu interface.

Note
If the input password is incorrect, press the ESC button to quit and input again.
Example 2: changing parameters
Taking High TEMP on Alarm Control interface as an example, the procedures are as follows:
1. Press the UP or DOWN button to move the cursor on the Alarm Menu menu in the Main Menu interface.
2. Press the ENTER button to enter the Alarm Menu menu.
3. Press the UP or DOWN button to move the cursor on Alarm Control item in the Main Menu interface.
4. Press the ENTER button to enter the Alarm Control interface.
5. Press the UP or DOWN button to move the cursor on High TEMP.
6. Press the ENTER button to highlight the parameter field of High TEMP.
7. Press the UP or DOWN button to select the parameter.
8. After selecting, press the ENTER button to confirm. The parameter will take effect.
9. Press the ESC button to return to the previous menu interface.

Note
After changing the parameter, if you do not press the ENTER button to validate the changed parameter, the change will be
invalid.

5.3 Indicator

The controller provides two indicators: running indicator and alarm indicator (see Figure 5-1). Their detailed functions
are described in Table 5-2.
Indicator
Running indicator
Alarm indicator

5.4 Control Interface

The LCD screen displays the communication status after the controller is powered on. If the controller cannot
communicate with its target interface board, the LCD screen will prompt Communication Failure. If the
communication is successful, the screen will display an OFF interface or a MAIN interface, which depends on whether
the AC unit is on or off.

5.4.1 OFF Interface

If the AC unit is turned off, after successful communication, the LCD screen will display the OFF interface, as shown in
Figure 5-2. As for which OFF interface will be displayed, it depends on the off mode of the AC unit.
2008/12/02 09:14:04
Standby OFF
Table 5-2 Function descriptions of indicators
Color
Green
Red
TUE D01 I01 2008/12/02
Figure 5-2 OFF Interface
DM Series 16kW Air Conditioner User Manual
Status
On The controller is working normally
Off The controller is not working normally
On No alarm is generated
Blinking An alarm is generated
09:14:04 TUE D01 I01
Remote Shutdown
Function descriptions
2008/12/02 09:14:04 TUE
Unit OFF
D00 I00