Occasionally, your pool pump may suffer a catastrophic event, like being struck by lightning, and you may be faced with having to replace the whole pump. This guide shows you how to replace a Jandy 2 HP Variable Speed Pump. Although the instructions are specific to a Jandy VS Pool Pump, many of the steps are applicable to other brands of VS pumps.
CHECK DIP SWITCH - The 4-position dip switch selects the pump address and determines what type of controller will be used with the pump. The system configuration in this guide uses an AquaLink RS Controller so all the switches should be set OFF (down). If a dedicated Jandy ePump Controller (JEP-R) was used, switches 1 and 2 would be set ON (up) and switches 3 and 4 would be set OFF (down). Note for clarification: many VS pumps have programming and control built into the control unit on top of the pump. The box on this pump only has the capabilility to change pump speeds. Control and timing of these speed changes is implemented in a separate unit like the AquaLink RE Controller or the Jandy ePump Controller mentioned above.
ATTACH CONTROL WIRES - Attach the four wires in the RS-485 control cable to the RE-485 connector. Match the wire colors with the positions on the connector: 1-red, 2-black, 3-yellow, and 4-green. It may be easier to remove the connector out of the connector bracket to connect the wires. Then replace the connector back into the bracket.
CHECK OPERATION OF PUMP - Check the operation of the pump. After it has cleared any residual air out of the system pipes and filter, the pump should run smoothly with little air visible though the Strainer Cover. Check for leaks around the discharge and input unions and tighten collars if required. Do not over tighten. If they continue to leak, shut the pump off and inspect the Union O-Rings.