Castel
The electronic regulators in series 5650 operate by monitoring the oil level using a combination of opto-electric sensors. The principle of optical detection of the level is based on the fact that a light directed on a glass prism returns a different refraction if the glass is immersed in a gas rather than in a liquid. The oil level control and relative alarm condition is governed by a control logic that is capable of maintaining the desired level by managing the number of refills and wait cycles and the relative opening and closing of the supply solenoid valve.
When a low level is detected, the electronic control unit commands the integrated solenoid valve. In incremental cycles, oil is injected into the compressor crankcase. Furthermore, the electronic control unit is equipped with an alarm relay capable of generating a cut-out signal for the compressor. Under normal operating conditions, this relay is energized. Otherwise, if the level remains low after a certain number of injection cycles, an alarm signal is generated, which de-energizes the relay.
NOTE: Under alarm conditions, the injection cycles continue. The electronic control unit continues to command the integrated solenoid valve. If the opto-electric sensor once again detects a correct oil level, the alarm is automatically reset and the regulator returns to operating under normal operating conditions. On the side of the regulator there are four LEDs that provide information about the operating conditions of the regulator
