Bendix Commercial Vehicle Systems AD-IS EVERFLOW - Manual (Page 12)

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• Excessive pressure (above 175 PSIG) in the
compressor discharge line. Look for obstruction
downstream of the Bendix ® AD-IS ® EverFlow ® assembly
such as a pinched line or restrictive valve or fitting.
2. Air dryers do not purge.
• Insufficient air pressure in the secondary reservoir.
The Bendix
® EverFlow ® electronic module will not
operate until air pressure in the secondary tank reaches
80 PSIG.
• The check valve in the EverFlow assembly supply
line from the secondary tank is installed incorrectly.
Refer to Figure 2.
• The fuse is blown or the air dryer is not connected
to the vehicle electrical system. Check the electrical
connection. If the fuse is blown, replace the fuse with
a higher amperage fuse. The fuse must be 15 amps
or higher.
• Incorrect voltage. The air dryer voltage must match
the vehicle voltage. Air dryers with a white heater
connector are 12 volt DC and air dryers with a grey
heater connector are 24 volt DC.
3. Air brake system will not build air.
• Compressor is undersized.
Some small capacity compressors will not develop
sufficient air delivery at engine idle to allow proper
operation of the EverFlow assembly and charge the
air brake system. It may be necessary to upgrade to
a compressor with a higher delivery.
4. Water in downstream reservoirs.
• Dryers not purging. See step 2 - Air dryers do not
purge.
• Desiccant cartridges need to be replaced.
• No pressure protection valve installed downstream
of the air dryers. Refer to Figure 2.
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SD-08-2417 © 2014 Bendix Commercial Vehicle Systems LLC, a member of the Knorr-Bremse Group • 07/14 • All Rights Reserved