GEA Grasso - Page 29

OPERATING INSTRUCTIONS
CO
2
/NH
3
CASCADE UNIT
250 - 1000 KW
_551511_om_kas_gbr_1_.doc 29
An output limiter is active (final pressure too high), "reduce output" solenoid valve is
opened.
Limit disch press 01
An output limiter is active (motor current too high), "reduce output" solenoid valve is
opened.
Limit Imot 01
An output limiter is active (external temperature too low), "reduce output" solenoid
valve is opened.
Limit ext temp 01
Oil temperature too high, "refrigerant injection" is released (optional).
Limit oil temp 01
The unit / cascade has received a switch-off command, the control slide is moved into
the minimum position
Stopping 01
The compressor has switched off
Compressor off 01
Start delay after each switching off process
Forced stoppage 01
A fault, which is still active, has occurred at the unit / cascade.
Fault 01
Text display flashes
italic lettering
Text appears as static text
Normal lettering
The status of the whole cascade is displayed with the LEDs in and .
Key Colour Status Explanation
Green Flashing
The unit / cascade is switched on. The compressor
could start any moment now.
Green Continuous light
The unit / cascade is switched on. The compressor is
running.
The unit / cascade is malfunctioning. The compressor is
not running. The (red) indicator light ‘Collective fault’
flashes or is permanently lit.
None OFF
+
red Continuous light
The unit / cascade is switched off. The compressor is
not running.