Designed to remove moisture and air from your air conditioning system, vacuum pumps also help prevent metal corrosion and keep moisture from freezing up. Your Robinair vacuum pump lowers the A/C system's pressure, vaporizes the pressure and then dissipates it into the air. If something goes wrong with your pump, troubleshooting will help you get your Robinair pump up and running faster than waiting for service.
Make certain you have clean pump oil and that it's at the correct level if your Robinair pump does not have a good vacuum. First let the pump run for a minute to warm up the oil.
Remove the oil drain cap underneath your pump, drain the oil into a container legal for disposal, then tilt the pump forward so you can drain out the remaining oil. Use original motor oil containers, water jugs or milk jugs to drain the oil into as long as the container did not contain chemicals such as gasoline, cleaners, bleach or paint. Secure the lid firmly and write "Used Motor Oil" on the container for recycling.
Put the oil drain cap back on, remove the oil fill cap next to the red handle and fill the reservoir with fresh pump oil until you can see the oil at the bottom of the sight glass.
Locate the sight glass on the side of your pump beneath the red exhaust fitting. Turn on the pump. After running the pump for one minute, check the oil level. If you see the oil level below the oil level line on the sight glass, while you have the pump running, pour in oil slowly until you see the oil at the oil level line.
Use only Robinair's Premium High Vacuum Pump Oil or another high vacuum pump oil. Replace the oil fill cap and ensure you have the oil drain cap tightened securely.
Check the line voltage if your Robinair pump will not start. The voltage at the electrical outlet should match the voltage on your pump motor decal, such as 115 volts and 60 hertz, for instance. Your pump's motor should start at plus or minus 10 percent of the line voltage at 41 degrees F.
Make certain you use an 18-AWG cord if you use an extension cord that measures under 25 feet. Using an undersized extension cord can cause a drop in line voltage, as well as overheating and power loss.
Reseal the oil drain plug if you see oil leaking around the plug area, using a commercial pipe thread sealer.
