﻿GET_GEVOMechL2_11_01_01_25 - ANIMATION Screen
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You can test the air compressor from any of the Smart Displays using Self-Tests 401, 402, and 403.

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These self-tests are used to test the operation of the Compressor Drive Contactors (CDC1, CDC2, and CDC2A) and the Compressor Magnet Valve (CMV), all of which will be discussed later.

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The Smart Display software controls when the air compressor motor turns on or off and at what speed by energizing the correct compressor drive contactors and when to load or unload the air compressor.

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To protect the air compressor motor from high startup currents, the motor is turned on first, and then the air compressor is loaded.

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Typically, the air compressor starts loading when the main reservoir pressure, as read by the ARPS sensor, drops below 128 psi and stops loading when the pressure rises above 141 psi.

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These values may vary depending on the railroad’s compressed air requirements.