Atlas Copco GA 37 VSD, Instruction Book

Page: 26 / 128

Protecting the compressor
Shut-down
Several sensors are provided on the compressor. If one of the measured signals exceeds the
programmed shut-down level, the compressor will be stopped. This will be indicated on display
(1) and general alarm LED (2) will blink.
Remedy the trouble and reset the message. See also the Inputs menu .
Before remedying, consult the applicable safety precautions.
Shut-down warning
A shut-down warning level is a programmable level below the shut-down level.
If one of the measured signals 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.
Warning
A warning message will appear if, on Full-Feature compressors, the dew point temperature is too
high in relation to the ambient temperature.
Service warning
A number of service operations are grouped (called Service Plans). 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 Service Plan.
Automatic restart after voltage failure
The controller has a built-in function to automatically restart the compressor when 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 the Atlas Copco Customer Centre.
If the function is 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.
Instruction book
24 API480496