Protections
Minimum
setting
Factory
setting
Maximum
setting
Compressor element outlet temperature
(shutdown warning level)
˚C 50 110 114
Compressor element outlet temperature
(shutdown warning level)
˚F 122 230 237
Compressor element outlet temperature
(shutdown level)
˚C 110 115 115
Compressor element outlet temperature
(shutdown level)
˚F 230 239 239
Service plan
The built-in service timer will give a Service warning message after a pre-programmed time
interval has elapsed.
Also see section Preventive maintenance schedule.
Consult Atlas Copco if a timer setting has to be changed. See section Calling up/modifying
service timer settings. The intervals must not exceed the nominal intervals and must coincide
logically.
Terminology
Term Explanation
ARAVF Automatic restart after voltage failure. See section Elektronikon regulator and Activating
automatic restart.
Restart delay This parameter allows to programme that not all compressors are restarted at the same
time after a power failure (ARAVF active).
Compressor
element outlet
The regulator does not accept inconsistent settings, e.g. if the warning level is
programmed at 95 ˚C (203 ˚F), the minimum limit for the shutdown level changes to 96
˚C (204 ˚F). The recommended difference between the warning level and shutdown
level is 10 ˚C (18 ˚F).
Delay at
shutdown signal
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 stop
time
Once the compressor has automatically stopped, it will remain stopped for the minimum
stop time, whatever happens with the net air pressure. Consult Atlas Copco if a setting
lower than 20 seconds is required.
Unloading/
Loading pressure
The regulator does not accept illogical settings, e.g. if the unloading pressure is
programmed at 7.0 bar(e) (101 psi(g)), the maximum limit for the loading pressure
changes to 6.9 bar(e) (100 psi(g)). The recommended minimum pressure difference
between loading and unloading is 0.6 bar (9 psi(g)).
Instruction book
2920 7109 51 55
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