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Aux air compressor cycling
I am having a problem with the aux. air compressor. I have corrected leaks and pressure will hold for 48 hours above 30 PSI I have a VIAIR 400C, HWH Leveling system and a single slide XLII It will run about 5 to 6 seconds and stop for about 15 to 20 seconds and run again. I have connected a jumper wire direct to a 12 Volt source and the VIAIR will pump up to 100PSI non stop, I have pluged the holding tank so I will not blow up slide blader I have replaced the pressure switch as per VIAIR, still no help. VIAIR trouble shooters are no help.
Larry and Miriam Nelson
2002 XLII VISION
2012 Honda CRV
Hurricane Ut
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2 Replies
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Did you work on system replacing a check valve ? If so that sounds like the compressor fills a line system sensing pressure and turns off.
Second question …is there an air line bent at a 90 degree angle by mistake ?
It’s really hard to fix or find the fault of an intermit compressor running. My suggestions are a guess.
AL
1999 XLV X-6872, liberty #440 -
Any time a compressor (or pump) short cycles and the pressure switch is known to be good the reason almost always is the volume of air being compressed is very small.
If the feed line from the compressor is attached to a tank with a few gallons of volume the compressor will run long enough to pressurize the tank to the setting on the pressure switch. But if there is a blockage or restriction in the line or the volume of the tank has been reduced (such as filled with water) the pump will short cycle. If the tank is known to be dry then look for a valve or kink in the air line from the compressor that is restricting the flow, but with enough leakage to bleed down the pressure in the line to restart the compressor. I doubt if the problem is past the discharge port of the tank so look from the compressor to the tank. The problem is somewhere in that part of the system.
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