GEA Grasso System Control Operating Instructions Manual page 17

Start to start LP
Imot Limitation LP
Pdis Limitation LP
Psuc Limitation HP
Slide to min LP
Starting LP
Stopping LP
Italic lettering
Normal lettering
The overall status of the compressor unit is displayed with the LEDs in
Key Colour
Green
Green
None
+
red
Green
Green
Green
Green
FOR TWO STAGE CHILLER/ PACKAGES WITH SCREW
A switch on frequency limitation of the LP compressor drive motor is still active
A capacity limitation is active (LP motor current too high), "reduce output" solenoid
valve is opened.
A capacity limitation as active (LP discharge pressure too high), "reduce output"
solenoid valve is opened
A capacity limitation as active (HP suction pressure too low), "reduce output" solenoid
valve is opened
Starting command issued, control slide moves into the minimum position (LP)
Compressor motor has been started, and the running feedback signal from the
starter panel has not yet been received (LP)
The compressor unit/ chiller has received a shutdown command, the capacity slide is
moved towards its minimum position (LP)
Text display flashes
Text appears as static text
Status
Flashing
Continuous light
OFF
Continuous light
Continuous light
Continuous light
Continuous light
Continuous light
_805011_om_gsc_sp2_gbr_1_.doc
OPERATING INSTRUCTIONS
GRASSO SYSTEM CONTROL
and
Explanation
The unit/ chiller has received a start request. The
compressor could start any moment now.
The unit/ chiller has received a start request. The
compressor is running.
The unit/ chiller is malfunctioning. The compressor is
not running. The (red) indicator light 'Collective fault'
flashes or is permanently lit.
The unit/ chiller is switched off. The compressor is not
running.
Display of the system deviation or the ext. actuating
pulses of the HP compressor (more output is required)
Display of the system deviation or the ext. actuating
pulses of the LP compressor (more output is required)
Display of the system deviation or the ext. actuating
pulses of the HP compressor (less output is required)
Display of the system deviation or the ext. actuating
pulses of the LP compressor (less output is required)
COMPRESSORS
.
17