User manual

2920 1475 00
11
Instruction book
1.3.4 Automatic restart after voltage failure
The regulator has a built-in function to automatically restart
the compressor if the voltage is restored after voltage failure.
For compressors leaving the factory, this function is made
inactive. If desired, the function can be activated. Consult
Atlas Copco.
Warning If activated and provided the module was in the
automatic operation mode, the compressor will
automatically restart if the supply voltage to the
module is restored within a programmed time
period.
The power recovery time (the period within which
the voltage must be restored to have an automatic
restart) can be set between 1 and 255 seconds or
to Infinite. If the power recovery time is set to
Infinite, the compressor will always restart after
a voltage failure, no matter how long it takes to
restore the voltage. A restart delay can also be
programmed, allowing e.g. two compressors to be
restarted one after the other.
1.3.5 Permissive start
After a start command (either automatic start by the electronic
regulator or manual start), the permissive start function is
operative: if the oil injection pressure at the compressor
elements exceeds the programmed level, the compressor will
not start (indicated as <<Start failure>>).
Fig. 1.9 Control panel
1.4 Control panel
1.4.1 LEDs/buttons/keys
Ref. Designation Function
1 Start button Push button to start the
compressor. LED (8) lights up
indicating that the Elektronikon
regulator is operative.
2 Display Indicates messages concerning the
compressor operating condition, a
service need or a fault.
3 Scroll keys Keys to scroll upwards or
downwards through the display.
4 Tabulator key Key to select the parameter
indicated by a horizontal arrow.
Only the parameters followed by
an arrow pointing to the right are
accessible for modifying.
5 Function keys Keys to control and program the
compressor. See section 1.4.3.
6 Voltage on LED Indicates that the voltage is
switched on.
7 General alarm Is alight if a shut-down warning
LED condition exists. See section 1.3.
7 General alarm Blinks if a shut-down condition
LED exists, if an important sensor is out
of order or after an emergency
stop. See section 1.3.
8 Automatic Indicates that the regulator is
operation LED automatically controlling the
compressor.
9 Stop button Push button to stop the
compressor. LED (8) goes out.
S2 Emergency Push button to stop the compressor
immediately in case of emergency.
After remedying the trouble,
unlock the button by pulling it out.