Ice Frost Operator’s Manual
OFF CONDITION
In this condition, the electronic control is not connected to the power supply. To connect the ECB to the power supply, the main system switch must be put in the ON position.
1st Filling Condition
Supposing both the bowls are empty when the power is switched ON, the following situation will occur: After a 3 second delay if the four probes, managed by the system, have detected no ‘presence’ of liquid, the (μcontroller will energies the bowl fill solenoid 1 and 2 to allow the bowl to fill to begin.
Bowl Level Probe | Bowl Level Probe |
Safety Probe Input | Safety Probe Input |
Bowl Fill Solenoid | Bowl Fill Solenoid |
Safety Probe Inputs and Bowl Level Probes Uncovered 
Bowl Fill Solenoids = ON
FIGURE 32
Explanation of system flow controls, the first probes to be ‘covered’ are the two safety probe inputs. However, this recognition of the passage of liquid does not actually stop the filling phase since the main ‘aim’ of the ECU is to fill the two bowls to the level required. Therefore only the recognition by bowl level probes interrupts the inlet of liquid into the bowl/s.
Safety Probe Inputs Covered and Bowl Level Probes Uncovered |
| Bowl Fill Solenoids = ON |
| ||
Bowl Level Probe |
| Bowl Level Probe |
Safety Probe Input |
| Safety Probe Input |
Bowl Fill Solenoid | Bowl Fill Solenoid |
Safety Probe Inputs Covered and Bowl Level Probes Covered 
Bowl Fill Solenoids = ON
FIGURE 33
Once the initial fill is complete, the (μcontroller will command ON the CO2 gas management solenoid valve, which has been kept forcibly
NOTE 1: The initial fill must take place within a maximum time lapse which is monitored by the μcontroller (see Alarms section).
NOTE 2: The initial fill might only concern one of the two bowls, but it will maintain the same features.
NOTE 3: If all the probes are covered when the system is switched ON, the CO2 gas management solenoid valve functioning is command ON.
Publication Number: M620919596OPR | - 18 - | © |
