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AD-IP™ AIR DRYER TROUBLESHOOTING CHART (Continued)
SYMPTOMS | CAUSE | REMEDY |
1. Dryer is constantly |
| 6. With gauge installed at RES port of governor, |
| pressure should not drop below | |
“cycling” or purging. |
| |
| at the onset of the compressor “Unloaded” | |
Dryer purges frequently |
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| cycle. If pressure drops, check for “kinks” or | |
(every 4 minutes or less |
| restrictions in line connected to RES port. Line |
while vehicle is idling) |
| connected to RES port on governor must be |
(continued). |
| same diameter, or preferably larger than, lines |
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| connected to UNL port(s) on governor. |
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| B. Holset “E” type | B. Test the Holset E Compressor unloader system |
| compressor. | with feedback line and check valve for proper |
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| operation. Make certain Holset ECON is not in |
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| use with the |
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| remove and retest. |
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| Check Valve |
Feedback Line
Typical
When installing a Bendix
2. Water and/or Oil in | A. Improper discharge line | A. Refer to section entitled Connecting the Air Lines |
Supply or Service | length or improper line | as well as Appendix A, Table A columns 1 & 2 |
Reservoir. | material. Maximum air | then check line size and length. |
| dryer inlet temperature is |
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| exceeded. |
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| B. Air system charged from | B. If system must have outside air fill provision, |
| outside air source | outside air should pass through air dryer. This |
| (outside air not passing | practice should be minimized. |
| through air dryer). |
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| C. Air dryer not purging | C. See Symptom #5. |
| (see Symptom #5). |
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18 |
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