Chapter 5 iCOM Controller 29
Liebert. PEX+Series Precision Air Conditioner User Manual
If you want to modify the preceding set points, you should input the password before entering the SET POINTS menu.
Then press the ENTER button to highlight it and use the UP and DOWN button to scroll the options. Press the ENTER
button to select one parameter, use the up or DOWN button to set the value, and press the ENTER button to save the
change.
5.6.4 EVENT LOG
You can enter the EVENT LOG menu without a password, as shown in Figure 5-7.
Figure 5-7 EVENT LOG menu
The EVENT LOG menu saves the last 400 system records. The event types include message, warning and alarm.
When the event type is message, the LCD will display the event name only.
When the event type is warning, the LCD will display the event name and the alarm indicator will turn on in red.
When the event type is alarm, the LCD will display the event name, the alarm indicator will turn on in red, and an
audible alarm will be raised.
5.6.5 GRAPHICS
The GRAPHICS menu provides two kinds of graphs: RETURN TEMP and RETURN HUMIDITY. These graphs reflect
the temperature and humidity changes over a period of time in the past.
In the graphs, the current temperature or humidity is the origin, the time is the horizontal axis, and the temperature or
humidity is the vertical axis, as shown in Figure 5-8.
Figure 5-8 The graph of return temperature and return humidity
As the horizontal axis, the time range can be set into eight kinds. Each pixel indicates different time in different time
ranges. See Table 5-5 for the detailed time range.
Table 5-5 Time range
Time range
Time indicated by each pixel
Time range
Time indicated by each pixel
8min
6s
2d
36min
32min
24s
4d
72min
1hr
45s
8d
144min
12hr
9min
16d
288min
24hr
18min
The scaling of the vertical axis can also be set. For the RETURN TEMP, the scaling range is ±3 ~ ±20; for the
RETURN HUMIDITY, the scaling range is ±10 ~ ±30. The bigger the scaling range is, the bigger the value each pixel
indicates will be, and the more centered the curves will be.
You can set the parameters without inputting the password. Press the ENTER button to highlight the parameters, use
the up or DOWN button to select one parameter. Then press the ENTER button again to enter the parameter, and use
the up or DOWN button to set the value. Press the ENTER button to save the change at last.
0
EVENT LOG P
（
01
）
1/31/2007 10 00
01
Warning
Power loss
:
RETURN TEMP
01
+03
-03
27
10 40
t 8d
:
:
°
C
RETURN HUMIDITY
01
+20
-20
+55%
10 42
t 8d
:
:
