Approximately 15 percent of pumps sent back to White Knight for evaluation, pass all tests that are performed on a brand new pump before shipping. While pulling a pump and sending it back to the manufacturer may seem like an easy way to see if a pump is the problem or not, in actuality, this is not the case. It is very expensive and time consuming for both the user and the manufacturer when consideration is given to decontamination, shipping, and evaluation procedures, costs, and time. Besides this, the real problem still needs to be found. We once had a very frustrated technician call White Knight informing us that a pump had failed. He put in a new one, it didn’t work, he put in another one and it didn’t work, he put in a third new pump and it worked perfectly for three days before it also failed. To make a long story short, it was found that a door interlock safety switch was malfunctioning causing it to close the solenoid valve that sends air to the pump. In actuality, nothing was wrong with any of the pumps, but the constant opening and closing of the door as pumps were changed out caused the safety switch to begin to work again, at least temporarily. It is these types of issues that we are trying to limit. By taking some time now to systematically follow the procedures in this guide, it is our belief that countless wasted hours, frustrations and lost money will be avoided.

This troubleshooting guide is designed to be used as a step by step procedure for systematically locating a problem and resolving it. To use this guide, find the symptom that you are experiencing. Then move down the list of possible causes in numerical order until the problem is found.

It is our goal to keep the systems running regardless of where the problem is found. We are not here to place blame, disown problems, or cover up problems until warranty times lapse. We are here to help you keep your system running. We understand that troubleshooting flow failure is often an arduous and frustrating task and we hope to be able to help you make it more bearable and less frustrating. As we always have, White Knight supports users of it’s products, not just purchasers of them. We are happy to receive your calls and more than willing to assist you in troubleshooting and resolution. Also, much of the information provided in this guide has been provided by our customers and users from all levels. We always appreciate additional information that we may include in future revisions to this guide.

Common Symtoms

 · Pump runs slow or erratically
 · Pump does not run at all or cycles only once or twice.
 · Pump runs erratically (Oscillates) (Machine Guns)
 · Pump Won’t Prime
 · Air Bubbles in Outlet Line
 · Puddles under or dripping from Pump
 · Chemistry misting out of or dripping from mufflers or in air lines
 · Inlet or outlet Synchro Flareâ fittings leak or blow off.