5.18 ELECTRONIC LEVEL DRAIN
Instead of the usual drain system (a solenoid valve controlled by means of electronic instrument); an
electronic level controlled drain can be installed as option. This drain consists of a condensate accumulator
where a capacitive sensor continuously checks the level of the liquid: as soon as the accumulator is filled,
the sensor passes a signal to the electronic control and a diaphragm solenoid valve will open to discharge
the condensate. For a complete condensate discharge the valve opening time will be adjusted exactly for
each single drain operation to avoid wasting air. No Y-shaped filter is installed and no adjusting is required.
A service valve is installed before the electronic drain in order to make check and maintenance operation
easy.
AT DRYER START-UP VERIFY THAT THIS VALVE IS OPEN.
CONTROL PANEL
The control panel here illustrated allows checking of drain working.
Power : LED ON - drain ready to work / supplied
Valve : LED ON - membrane solenoid valve open / discharging
Alarm : LED ON - drain in alarm condition
Test : button - discharge test (keep pushed for 2 seconds)
TROUBLESHOOTING
Only qualified personnel should perform troubleshooting and or maintenance operations.
Prior to performing any maintenance or service, be sure that:
• no part of the machine is powered and that it cannot be connected to the mains supply.
• no part of the machine is under pressure and that it cannot be connected to the compressed
air system.
•
Maintenance personnel have read and understand the safety and operation instructions in
this manual.
SYMPTOM POSSIBLE CAUSE - SUGGESTED ACTION
No led lighting up. Verify that the system is powered.
Verify the electric wiring (internal and/or external).
Check internal printed circuit board for possible damage.
Pressing of Test button,
but no condensate
discharge.
The service valve located before the drain is closed - open it.
The dryer is not under pressure - restore nominal condition.
Solenoid valve defective - replace the drain.
The internal printed circuit board is damaged - replace the drain.
Condensate discharge
only when Test button is
pressed.
The capacitive sensor is too dirty - open the drain and clean the sensor
plastic tube.
Drain keeps blowing off
air.
The diaphragm valve is dirty - open the drain and clean it.
The capacitive sensor is too dirty - open the drain and clean the sensor
plastic tube.
Drain in alarm condition. The capacitive sensor is too dirty - open the drain and clean the sensor
plastic tube.
The service valve located before the drain is closed - open it.
The dryer is not under pressure - restore nominal condition.
Solenoid valve defective - replace the drain.
NOTE : When the drain is in alarm condition, the diaphragm solenoid valve will open 7.5 sec every 4 min.
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