Chapter 5 iCOM Controller 35
Liebert.PEX Chilled Water Series Air Conditioner User Manual
The functions of the buttons are described in Table 5-2.
Table 5-2 Function description of buttons
Button
Function description
ON/OFF
button
1. Switch on/off the system.
Press the ON/OFF button to shut down an operating system, or to start an idle system.
2. Test the display state of the backlight of the LCD and the operation indicator.
After powering-on, when the system is in the standby state (defined as test state in this manual), pressing
the ON/OFF button will switch between the operation indicator (green then) and the LCD backlight. This
function is used to test whether the LCD backlight and the operation indicator are normal
Enter
button
1. Enter the selected menu, or save the setting after parameters are changed. When you are entering a
menu or changing a parameter, the menu and the parameter will be high lighted.
2. Test the display of characters.
When the system is in the test state, pressing the enter button will display the ASCII code. This function is
used to test whether the characters are displayed normally on the LCD
ESC button
1. Quit the current menu.
2. Abolish the current change of parameter.
3. Test the LCD high light.
Pressing the ESC button to switch the LCD between light and high light when the system is in the test
state. This function can test whether the LCD high light is normal
Up button
1. Increase the value of the displayed parameter during parameter setting.
2. Scroll a row or a screen up in the query state.
3. Test the buzzer.
Pressing the up button when the system is in the test state will increase the buzzing frequency (initial
value: 0%). Meanwhile the buzzer will sound at the set frequency. This function is used to test whether the
buzzer is normal
Down
button
1. Decrease the value of the displayed parameter during parameter setting.
2. Scroll a row or a screen down in the query state.
3. Test the buzzer.
If the buzzer frequency is not 0%, pressing the down button when the system is in the test state will
decrease the buzzing frequency. Meanwhile the buzzer will sound at the set frequency. This function is
used to test whether the buzzer is normal
Left button
1. Select the left bit during the parameter setting operation.
2. Test the LCD contrast.
Pressing the left button when the system is in the test state will decrease the LCD contrast (by default:
100%). This function is used to test whether the LCD contrast is normal
Right
button
1. Select the right bit during the parameter setting operation.
2. Test the LCD contrast.
If the LCD contrast is not 100%, pressing the right button when the system is in the test state will increase
the LCD contrast. This function is used to test whether the LCD contrast is normal
Alarm
silence
button
1. The system will issue an alarm sound upon alarms. If you press the alarm silence button, the alarm
sound will be eliminated.
2. Clear the current alarm after the alarm sound is silenced.
3. Test the alarm indicator, and rest the LCD contrast and buzzer frequency.
Pressing the alarm silence button when the system is in the test state will switch the alarm indicator
between on and off. It can test whether the alarm indicator is normal. Meanwhile, reset the LCD contrast to
100% and buzzer frequency to 0%
Help button
1. Display the online help.
2. Test the yellow display of the LCD operation indicator.
When the system is in the test state, pressing the help button will switch on and off the LCD operation
indicator. This function is used to test whether the yellow display of the LCD operation indicator is normal
Note
1. After the system is powered on, the system will assume the operation state before power-off. For example, if the system is in
the work state when it is powered off, it will enter the work state automatically after power-on. You do not need to start it
manually.
2. When the system is in the test state, the setpoints will not be written into the iCOM controller.
