GEA Grasso Manual page 31

Grasso
Refrigeration Division
Limit disch temp 01
Limit mot current 01
Limit ext temp 01
Limit timer 01
Pump down 01
Stopping 01
Compressor off 01
Failure 01
italic writing
Normal writing
The overall status of the compressor unit is displayed with the LEDs in
Key Colour
Green
Green
None
+
Red
01.2004/1
A capacity limitation is active (discharge temperature too high),
the capacity cannot be decreased. In case the discharge temperature rises, the
capacity will be increased.
A capacity limitation is active (motor current too high),
the capacity cannot be increased. In case the motor current rises, the capacity will be
decreased.
A capacity limitation is active (external temperature too low),
the capacity cannot be increased. In case the external temperature drops, the
capacity will be decreased.
The delay time after a limitation is still active.
Before starting and stopping the compressor, the suction pressure is decreased until
the "Stop pressure" is reached (if the pump down sequence is activated only).
The compressor unit has received a shutdown command,
the capacity is decreased to its minimum.
The compressor is switched off and the start is disabled.
A failure on the compressor has occurred, which is still active.
Text display flashes
Text display is static
Status
Flashing
Continuous light
OFF
Continuous light
638660E_chapter1.doc
GRASSO SYSTEM CONTROL
and
Explanation
The unit has received a start request.
The compressor may start.
The compressor is running.
The unit is switched off, there is an alarm active. The
alarm light on the cabinet is active.
The unit is switched off.
.
Chap. 1 - 19