Emerson Chilled Water Series User Manual page 42

The functions of the buttons are described in Table 5-2.
Button
1. Switch on/off the system.
Press the ON/OFF button to shut down an operating system, or to start an idle system.
ON/OFF 2. Test the display state of the backlight of the LCD and the operation indicator.
button 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
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.
Enter
2. Test the display of characters.
button
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
1. Quit the current menu.
2. Abolish the current change of parameter.
ESC button 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
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.
Up button
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
1. Decrease the value of the displayed parameter during parameter setting.
2. Scroll a row or a screen down in the query state.
Down 3. Test the buzzer.
button 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
1. Select the left bit during the parameter setting operation.
2. Test the LCD contrast.
Left button
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
1. Select the right bit during the parameter setting operation.
Right 2. Test the LCD contrast.
button 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
1. The system will issue an alarm sound upon alarms. If you press the alarm silence button, the alarm
sound will be eliminated.
Alarm 2. Clear the current alarm after the alarm sound is silenced.
silence 3. Test the alarm indicator, and rest the LCD contrast and buzzer frequency.
button 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%
1. Display the online help.
2. Test the yellow display of the LCD operation indicator.
Help button
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.
Liebert.PEX Chilled Water Series Air Conditioner User Manual
Table 5-2 Function description of buttons
Function description
Chapter 5 iCOM Controller 35