Preventing Pressure Loss - Datakom DK-45 User Manual

DK-45 Kullanım Kılavuzu

6.5. PREVENTING PRESSURE LOSS

If the outputs pressure stays above E.05 Start Pressure during E.25 Unload Timer, then the controller
will stop the motor. When the motor is at rest, if the pressure falls below E.05 Start Pressure then the
motor will run again.
A delay equal to E.22+E.23+E.24+E.15x3 will pass until the compressor enters under load again.
During this period, depending on air consumption, the pressure may fall well below E.05 Start Pressure.
But in most systems the pressure is not desired to fall below E.05 Start Pressure.
In order to prevent this unwanted situation, the controller offers 3 different solutions and the related
procedure is selected through E.38 Prevent Pressure Loss parameter. Using these procedures, the
controller redetermines dynamically the startup pressure (Pi: Restart Pressure).
E.38 = 0  No special care is taken for pressure loss. Restart pressure is always E.05 parameter.
E.38 = 1  At the moment where the compressor takes the load, if the pressure is below E.05 Start
Pressure, the controller will increase the Restart Pressure by 0.1 bar. If the prssure is above the E.05
Start Pressure, the controller will decrease the Restart Pressure by 0.1 bar. Thus it will try to put the
compressor under under load exactly when the pressure equals to the E.05 Start Pressure.
E.38 = 2  When the compressor unloads after reaching the E.04 Stop Pressure, the controller
monitors the pressure decrease in the first 8 seconds and recalculates the Restart Pressure dynamically
for each restart period.
At the end of E.25 Unload Timer, if the pressure is above E.05
Start Pressure but below Restart Pressure, then the compressor
continues off_load operation.
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V1.0 (22.09.2016)