Main Interface - Liebert DM User Manual

5.4.2 MAIN Interface

If the AC unit is turned on, after successful communication, the MAIN interface will appear on the LCD screen, as
shown in Figure 5-3. If no control button is pressed within 2min, the controller will enter a screen-protection state (the
back lighting is off) until any control button is pressed. In this interface, pressing the UP or DOWN button can regulate
the contrast of the LCD screen. Pressing the UP button brightens the screen and pressing the DOWN button darkens
it.
The MAIN interface provides the following information:
1. Date
4. Display board address
7. Temperature setpoint
10. Unit working icons (including fan,
cooling, humidifying, dehumidifying,
heating, general alarm, locking and
on/off/standby state)
Temperature graph
Unit working icon
The MAIN interface provides three types of unit working icons, including dynamic running state icon, locking state icon
and on/off/standby state icon. These icons inform the operators of the operation mode in which the AC unit is working.
The icons and their definitions are listed in Table 5-3.
Mode
Dynamic
running state
icons
Temperature graph
The temperature graph indicates the difference between the actual temperature and temperature setpoint. The
number +15 (-15) on the right side of this graph is the difference between the max. (min.) temperature and the
temperature setpoint. For example, the actual temperature of the point at +15 position is 39° C (= 15° C + 24° C).
Humidity graph
The humidity graph indicates the difference between the actual humidity and the humidity setpoint. The number +15
(-15) on the right side of the humidity graph is the difference between the max. (min.) humidity and humidity setpoint.
For example, the actual humidity of the point at -15 position is 35%RH = (50%RH + (-15%RH)).
2. Time
5. Interface board address
8. Actual humidity
11. Humidity graph within 1h
Date
2007/04 /13 09 : 00 : 00
T=01
Humidity graph
T=01
Figure 5-3 MAIN interface
Icon Definition
Fan running
Cooling state
Heating state
Humidifying state
Dehumidifying state
General alarm
Liebert_DM 16kW Air Conditioner User Manual
Chapter 5 Precision Air Conditioner Controller
Display board
Time weekly-date address
FRI D00 I00
o
+15
RT 24 C
24
o
SP 24 C
-15
22:15
+15
RT 51%rH
50
SP 50%rH
-15
22:15
Unit working icons
Table 5-3 Icon definitions
Mode
Locking state
icons
On/off/standby
state icons
3. Weekly-date
6. Actual temperature
9. Humidity setpoint
12. Temperature graph within 1h
Interface board address
Actual temperature
Temperature setpoint
Actual humidity
Humidity setpoint
Icon
Locking state
Unlocking state
Standby state
Shut-down state
Running state
37
Definition