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Pressing the RUN
button or issuing a Remote START/STOP command if enabled will switch the
compressor to run mode. In this phase, the controller decides to start the compressor if the output
pressure (Main Pressure measurement value) drops below
Start Pressure
(or when the pressure switch
closes).
The STAR relay output is activated before the compressor starts running. At the end of
Delay Between
Relays
timer, the MAIN relay engages, thus the motor will start-up in STAR configuration.
At the end of
Star Timer
, the STAR relay disengages and the DELTA relay engages at the end of
Star/Delta Timer
.
After the expiration of
Time Before Load
, the LOAD relay will engage and the compressor starts
producing compressed air.
When the output pressure (P1) reaches the
Stop Pressure
, (or the pressure switch closes) the load relay
will release and the motor will run off-load for the duration of
Unload Timer
. If the output pressure falls
below
Start Pressure
before this timer expires, the LOAD relay will be activated again.
If the output pressure stays above the
Start Pressure
for the duration of
Unload Timer
, (or the pressure
switch remains open) then the DELTA relay releases. After
Delay Between Relays
, the MAIN relay
releases.
The RUN LED starts blinking in this case.
The maximum number of start cycles that the compressor is allowed to perform in 1 hour is defined by the
Max Starts per Hour
program parameter.
If the maximum number of starts has been reached, the following stop cycles will be skipped until the end
of the 1 hour period and the motor keeps running off-load.
12.5. STOPPING AND RESTARTING FOLLOWING OUTPUT
PRESSURE
12.4. UNLOADING AND RELOADING THE COMPRESSOR
12.3. STARTING THE COMPRESSOR
