See section Programmable settings.
A number of time-based automatic start/stop commands may be programmed. Take into
account that a start command will be executed (if programmed and activated), even after
manually stopping the compressor.
Protecting the compressor
Shut-down
If the compressor element outlet temperature exceeds the programmed shut-down level, the compressor will
be stopped. This will be indicated on display (1) and general alarm LED (2) will flash. The compressor will
also be stopped in case of overload of the fan motor.
Remedy the trouble and reset the message. See also section Status data menu.
Before remedying, consult sections Safety precautions and Problem solving
Shut-down warning
A shut-down warning level is a programmable level below the shut-down level.
If the compressor element outlet temperature exceeds the programmed shut-down warning level, a message
will appear on display (1) and general alarm LED (2) will light up to warn the operator that the shut-down
warning level is exceeded.
The message disappears as soon as the warning condition disappears.
Service warning
A number of service operations are grouped (called Service plans A, B, C, ...). Each Service plan has a
programmed time interval. If a time interval is exceeded, a message will appear on display (1) to warn the
operator to carry out the service actions belonging to that plan.
Warning
A warning message also appears if:
• On water-cooled compressors, the cooling water outlet temperature exceeds the warning level.
• On Full-Feature compressors, the dewpoint temperature exceeds the warning level.
Automatic restart after voltage failure
The regulator has a built-in function to automatically restart the compressor when the voltage is restored after
voltage failure. This function is deactivated in compressors leaving the factory. If desired, the function can
be activated. Consult the Atlas Copco Customer Centre.
If activated, and provided the regulator 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 10 and 3600 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.
Instruction book
26 2920 1634 04
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