Originally Posted by guy99
I have one of these compressors which I carry for emergency tire inflation. It has come in handy a few times. The instructions tell you to connect the air hose to the tire, then switch the unit it on and monitor the air pressure via the pressure gauge built in to the inflator. When I follow these directions and connect the unit to motorhome tires, the 30 amp fuse blows as soon as I switch the unit on. The compressor seems to draws too much current trying to start. If I start the unit, then attach it to the tire, the compressor works fine.
I have been assuming that this is a characteristic of the compressor, but perhaps not. What is the pressure at which your system starts the compressor? Have you had any problems with blown fuses?
Guy, the likely reason its blowing the fuse is because the compressor is trying to start under load (i.e. the compressor has pressure on the piston prior to starting). The compressor arrangement in our motorhomes uses a pressure switch that bleeds the pressure off the compressor when it stops so that when it restarts it is not under a load. The check valve keeps the air in the tank during the bleed off after shutdown.
It sounds to me like the instructions with the compressor are wrong.
Air forums # 1674
1974 20' Argosy Motor Home
1974 31' Excella trailer (parting out, as of 4/1/2015 I have wheels, brake drums, windows & holding tanks left to sell)