Cause |
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The debris removal collection nozzle is blocked, or there is a leak in the debris collection hose, or there is a leak in the pressure sensor lines, or the dDebris collection nozzle is too dirty, causing blockage of the pressure tap hole, or the software parameter settings are incorrect, or the sensors are connected incorrectly, or the particulate filter is full, or there is a manufacturing defect in the UDRC-L electronics backpack cable. |
Solution |
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Cause 1: The debris removal collection nozzle is blocked.
Solution: Check the nozzle for obstructions (such as a slipsheet) and remove.
Cause 2: Leak in the debris collection hose.
Solution: Check the debris collection hose for leaks (cracks in the hose or poor connections). Inspect the entire length between the nozzle and the cabinet.
Cause 3: Leak in the pressure sensor lines.
Solution: Check all sensor tubes for kinks/ holes and for poor connections, especially the 2 connections from the UDRC-L electronics enclosure to the UDRC bulkhead. These particular 1-touch fittings have been known to appear connected, but actually require a substantial additional force to become properly seated. Also check the nozzle pressure tap and nozzle pressure sensor tubes, UDRC backpack sensor connections, and UDRC bellmouth connection (below screen at bottom of filter pot).
Cause 4: Debris collection nozzle is too dirty, causing blockage of the pressure tap hole.
Solution: Every design of collection nozzle has a tiny pressure tap hole that could get clogged over a period of time. Please refer to the appropriate cleaning instructions.
Typically this will appear as a lower flow in the collection nozzle than in the bellmouth (UDRC-L) flow sensor.
Cause 5: Incorrect software parameter settings.
Solution: Refer to document #750-00001A, Debris Removal Firmware Guide_Parameter Values, Descriptions and Flowchart (available on TechPlanet). Check the lookup tables on page 1, and check all the current values, especially: nfc, nfe, bfc, bfe, fmaxdiff, nst (their long names are cross-referenced in the document).
Cause 6: If the particulate filter is new and the difference between the flows at the nozzle and bellmouth are greater than 14 SCMH, then the sensors may be connected incorrectly.
Solution:
- Remove the UDRC-L electronics enclosure.
- Check that the 0-10" sensor is plugged into AN1 and the 0-100" sensor is plugged into AN2.
- Reseat the 3 connectors AN1, AN2 and AN3.
- Check that the larger (clear) sensing hose is connected (via a Y-junction) to the LOW port of the 0-100" sensor and the HIGH port of 0-10" sensor.
- Check that the smaller hose (small blue hose expanding to big clear hose) is connected to the LOW port of the 0-10" sensor.
Cause 7: The particulate filter is full.
Solution: Replacing the filter will not fix the problem, but might bring the flow rate above minimum so that the customer can continue imaging until the real problem is resolved. It this works, you will get error #27015/43015: There may be a partial blockage of the collection nozzle, or a leak, but the flow rate is still above minimum.
Cause 8: A manufacturing defect in the UDRC-L electronics backpack cable.
Solution: In a rare incident a small batch of defective backpack cables was shipped. Check that on the 25-pin UDRC bulkhead connector from the backpack, there is a wire loop connecting pins 16 and 3.
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