Atlas Copco ga55+ Instruction Book page 69

Instruction book
Parameters
Motor running time in star
Load delay time (star-delta)
Number of motor starts
Minimum stop time
Programmed stop time
Power recovery time (ARAVF)
Restart delay
Communication time-out
Protections
Compressor element outlet temperature
(shut-down warning level)
Compressor element outlet temperature
(shut-down level)
For water-cooled compressors also:
Cooling water inlet temperature (warning
level)
Cooling water outlet temperature (warning
level)
Service plan
The built-in service timers will give a Service warning message after their respective preprogrammed time
interval has elapsed.
Also see sectionPreventive maintenance
Consult Atlas Copco if a timer setting has to be changed. The intervals must not exceed the nominal
intervals and must coincide logically. See section
Terminology
Term
ARAVF
Power recovery
time
Restart delay
Compressor
element outlet
Delay at shut-
down signal
9096 3313 00
schedule.
Explanation
Automatic Restart After Voltage Failure. See section
Is the period within which the voltage must be restored to have an automatic restart. Is
accessible if the automatic restart is activated. To activate the automatic restart
function, consult Atlas Copco.
This parameter allows to programme that not all compressors are restarted at the same
time after a power failure (ARAVF active).
The recommended minimum setting is 70 °C. For testing the temperature sensor the
setting can be decreased to 50 °C. Reset the value after testing. The regulator does not
accept illogical settings, e.g. if the warning level is programmed at 95 °C, the minimum
limit for the shut-down level changes to 96 °C. The recommended difference between
the warning level and shut-down level is 10 °C.
Is the time for which the signal must exist before the compressor is shut down. If it is
required to program this setting to another value, consult Atlas Copco.
Minimum
setting
sec 5
sec 0
starts/day 0
sec 10
sec 0
sec 10
sec 0
sec 10
Minimum
setting
°C 50
°C 111
Minimum
setting
°C 0
°C 0
Modifying general settings.
Factory Maximum
setting setting
10 10
0 10
240 240
20 30
3 20
10 3600
0 1200
30 60
Factory Maximum
setting setting
110 119
120 120
Factory Maximum
setting setting
50 99
60 99
Elektronikon regulator.
69