Question about Honda Quincy 17 - Gallon Air Compressor with 5.5 Hp - G15H17PC3B

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IR EP100 compressor-getting change separator element alarm

Changed element still gives alarm. Lost a piece of surgical glove into the air intake weeks ago. Is this clogging something? I need a schematic of the air flow so I can better troubleshoot this. I am suspecting a solenoid and pressure switch located on the front inside wall of the unit that is plumbed to one side of the separator pressure by a 1/4" nylon hose. I dont understand the engineering behind this sensor since the opposite side of the separator seems to be plumbed to the output hose of the unit. Any ideas?

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  • fredericksim May 11, 2010

    what alarm , is it air filter differential ,separator and or oil filter? the glove should have been schredded and deposited into the separator tank



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Ingersoll-Rand uses a differential pressure switch that should be hooked to the separator tank on the "wet" side of the filter and to the "dry" side of the filter, either to the sump lid or to the bottom side of the minimum pressure valve on top of the sump tank. if it is hooked up down stream of the minimum pressure valve it will not work correctly.

If it does not use this, it reads pressure between 2 transducers on the compressor to determine the pressure drop across the separator filter while the compressor is under load. ou need to determine what system you have first to figure out what the problem is. feel free to contact me through my website for more information

Posted on Dec 16, 2009


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To answer the question. You may have a pressure transducer bad but most likely you have a minimum pressure check valve stuck in the closed position. When the compressor starts air pressure in the separator tank builds. At approximately 65 Psi the MPCV opens and allows air to the after cooler and out into the system. If the MPCV doesn't open the air pressure in the separator tank becomes to high. You then get the high pressure alarm and the unit shuts down.
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1. water in pressure tank of the compressor - clean the compressor holding tank
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regarding 1:
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open drain valve on the tank and drain the content
on the compressor body find oil drain and drain oil
fill with new oil according to instruction on your compressor
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re 2:
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re 3:
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increase air flow... this actually should be done first.

for better instruction - please provide with model of the gun and paint used.

your comment and rating will be appreciated.

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