2920 1381 02
11
Instruction book
1.3.1.3 Automatic restart 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 254 seconds or
to symbol 00!. If the power recovery time is set to
00!, the compressor will always restart after a
voltage failure, no matter how long it takes to
restore the voltage.
SENSORS/LOADING SOLENOID
VA LV E
PDT1 Pressure sensor, pressure
difference over oil separator
PT20 Pressure sensor, air outlet
TT11 Temperature sensor,
compressor element outlet
TT51 Temperature sensor, cooling
water outlet 4)
Y1 Loading solenoid valve
CUBICLE
F1/5 Fuses
F21 Overload relay, drive motor
K21 Line contactor
K22 Star contactor
K23 Delta contactor
Q15 Circuit breaker, fan motor 3)
T1/T2 Transformers
1X1/3 Terminal strips
CONTROL MODULE (E1)
I Start button
K01 Blocking relay
K02 Auxiliary relay, star
contactor
K03 Auxiliary relay, delta
contactor
K04 Auxiliary relay, loading-
unloading
K05 Auxiliary relay, high/low
pressure
K06 Auxiliary relay, manual/
automatic operation
K07 Auxiliary relay, general
warning
K08 Auxiliary relay, general shut-
down
K10 Auxiliary relay, dryer control
0 Stop button
S3 Emergency stop button
MOTORS
M1 Drive motor
M2 Fan motor 3)
M3 Fan motor, electric cabinet 5)
OPTIONAL EQUIPMENT
A1 Dryer
B1 Electronic condensate drain
E4 Communication module
Y2 Solenoid valve, modulating
control
Fig. 1.8 Electrical diagram of 50 Hz compressors with star-delta starter (typical example)
1.3.2 Control panel (Fig. 1.9)
Ref. Desig- Function
nation
1 Automatic Indicates that the regulator is automatically
operation controlling the compressor: the compressor
LED is loaded, unloaded, stopped and restarted
depending on the air consumption and the
limitations programmed in the regulator.
2 Voltage on Indicates that the voltage is switched on.
LED
3 General Is alight if a warning or shut-down warning
alarm LED condition exists or if a sensor is out of
order.
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