Revision 1 – 04.12.2015
23/28
HOW LOGIK 26-S CONTROLS THE COMPRESSOR
Management of the compressor
The symbols into the above squares indicate the compressor status showed on the main visualization of the LCD.
The back is grey while the symbol is blinking.
Motor start
When the motor is activated the icon
is visualized on the part related to the pressures.
Motor starts according the following procedure:
1.
Line contactor and star contactor are activated for the time set on Wt1.
2.
Star contactor deactivates and pause for the time set on Wt2.
3.
Delta contactor activation.
4.
Wait for time on Wt3, activation of load solenoid valve by exciting RL4.
Safety time Wt5
Pushing
the compressor stops according the following procedure:
1.
If the compressor is loading it switches to unloading for the time set on Wt5; during timer in progress restart is
accepted by the start button.
2.
If the compressor is running unload and the value of Wt4 in progress is higher than Wt5 setting, the compressor stops
while Wt4 will be over.
3.
If the value of Wt4 in progress is lower than Wt5 setting, Wt5 goes counting and the compressor will stop once Wt5 is
over.
Once the compressor stops for reaching pressure set, the timer Wt5 starts: during that time if you push the start
button, the display visualizes
and the compressor will not start till the Wt5 counting is over.
In case the compressor stops due to alarm detection, till timer Wt5 starts: during that time, if you rest the alarm and push
the start button, the symbol
start blinking and the compressor will not start till Wt5 counting is over.
Stop the compressor through remote start/stop input - IN4 (status symbol
)
When the input IN4 opens, the compressor stops according the following procedure:
1.
If the compressor is loading, switch to unload running for the time set on Wt5 and the display visualizes the blinking
symbol
(instead of
); once the timer is over, if IN4 is still open the compressor stops and the symbol
stops
blinking.
During Wt5 counting, if IN4 closes the compressor turns back under pressure transducer control.
2.
Once Wt5 is over, if the compressor is running unload, it stops and the display visualizes
.
3.
If the compressor is in stand-by status due to pressure set reached, the display visualizes the symbol
.
0
I
SHUT OFF
OFF
WAITING Wt5
MOTOR STARTS
IN SET
LOADING
UNLOADING
UNLOAD FOR
SET REACHED
0
0
0
SHUT OFF
ALARM
R
I
I
Timer Wt5>0
Timer
Wt5=0
Press>P.Stop
Timer
Wt4=0
Press<
P.Start
Timer
Wt5=0
Press<P.Start
