Technical information

Ice Frost Training 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.

FIGURE 35

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.

FIGURE 36

Once the initial fill is complete, the (µcontroller will command ON the CO

gas management solenoid

valve, which has been kept forcibly de-energized.

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 CO

gas management

solenoid valve functioning is command ON.

Bowl Level Probe

Safety Probe Input

Safety Probe Inputs and Bowl Level Probes Uncovered Bowl Fill Solenoids = ON

Bowl Fill Solenoid

Bowl Level Probe

Safety Probe Input

Safety Probe Inputs Covered and Bowl Level Probes Covered Bowl Fill Solenoids = ON

Safety Probe Inputs Covered and Bowl Level Probes Uncovered Bowl Fill Solenoids = ON

Bowl Fill Solenoid