GEA Grasso, Manual

Page: 14 / 166

Grasso
Refrigeration Division
GRASSO SYSTEM CONTROL
Chap. 1 - 2 638660E_chapter1.doc 01.200
4
/
1
1.1.2 Lamps/ Push buttons
)
White indicator light (Running)
This indicator lamp flashes slowly when the compressor unit is in the “Ready“ state.
This lamp flashes quickly during start up of the compressor.
Once the compressor has started, the light becomes steady.
This lamp flashes quickly during the shut down operation, until the compressor drive motor is switched off.
)
Yellow indicator light (Warning)
This lamp flashes if an operating condition reaches a preset value (Warning /Pre-alarm).
Detection of this warning can be acknowledged at the operator panel. After the warning has been
acknowledged at the operator panel, this flashing light changes over to a steady light, as long as the warning
condition remains.
When the operating conditions are back to normal the warning is automatically reset and the indicator light
switches off again.
)
Red indicator light (Alarm)
This lamp flashes if an operating condition exceeds its permitted value, the machine shuts down on alarm.
This state is signalled by a red flashing light. After the alarm has been acknowledged at the operator panel, this
flashing light changes over to a steady light, as long as the alarm condition remains.
Once the cause of the alarm has been corrected, this indicator light switches off (after it has been
acknowledged).
)
Emergency stop button
This red button can be used to switch the compressor unit off at any time in case of an emergency. The operator
terminal controls remain functional.
1.2 Operator terminal
The operator terminal is the interface between the operator and the control unit.
All switching, operating and control actions are carried out via this operator terminal.
System LED’s function keys soft keys CPU operating mode setting
digital keybord cursor keys system keys system keys LED‘s
Figure 1.3: GSC operator terminal
)
For detailed explanation of the system LEDs see Chapter 4.1