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Starting the evacuation function:
The evacuation mode will start when pressing the ENB key only if all 3 of the following conditions are met:
▪
Suction pressure probe P1 value < SPF6
▪
Gas cooler (condenser) pressure probe P2 value < SPF6
▪
Flash tank pressure probe P3 value < SPF6
NOTE: SPF6 = Pressure setpoint to stop evacuation mode (factory-set to 10 bar).
The ENB key will remain visible all the time. If the evacuation function is enabled but one of the above
conditions is not met, the following message will be displayed:
▪ "Enabling condition for Evacuation Mode not met, waiting for it"
Subsequently:
1)
The HP and BP valves open directly 100% (the evacuation mode has priority over the valves override
function).
2)
The compressor is switched off (safety timers are ignored).
3)
The fan is switched off, while auxiliary outputs are not influenced (safety timers are ignored).
4)
The alarms are disabled except for the communication alarms.
Stopping the evacuation function:
The evacuation mode will be deactivated when
1)
One of the 3 pressures probes P1, P2 & P3 > SPF6 or
2)
the DISB key is pressed.
When the evacuation function is stopped, the controller returns to its previous status, ie, Off or regulation.
NOTE: As long as the evacuation function is active, the evacuation label will flash on the main display
– see Figure 5 below. After pressing the EXIT key, the previous screen will be displayed again.
Figure 5
NOTE: If one of the 3 probes (suction pressure, gas cooler pressure or flash tank pressure) is not
configured or in error, the evacuation mode cannot be executed.
CC7.8.9/0519/E
4/7
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