The Grundfos 96348918 is a comprehensive control board replacement kit designed for high-capacity HM (Horizontal Multistage) pumps and related pumping systems. This “Large” kit is a critical service part that houses the main power electronics, frequency converter logic, and interface circuitry required to manage motor speed and pump performance. Engineered for precision and longevity, it allows for the seamless integration of pressure control and energy-saving features into Grundfos commercial and industrial water systems.

Product Specifications

• Model Number: 96348918

• Kit Type: Control Board HM LARGE Kit

• Compatibility: Grundfos HM Series, CME, and specialized E-pump ranges

• Input Voltage: Supports standard industrial voltage ranges (typically 380-480V or 200-240V depending on motor frame)

• Function: Motor control, frequency regulation, and thermal protection

• Components included: Main PCB, thermal paste, mounting screws, and interface connectors

Dimensions and Physical Attributes

• Length: 24.5 cm

• Width: 19.2 cm

• Height: 5.8 cm

• Weight: 1.15 kg

• Country of Origin: Denmark / Hungary

Application Fields

This control board kit is primarily used in commercial building services and industrial water supply. It is essential for pressure boosting systems, boiler feed applications, and industrial washing/cleaning systems. By utilizing this HM Large kit, operators can maintain precise pressure control in high-rise buildings, irrigation networks, and cooling systems, ensuring that the pump responds dynamically to changes in water demand.

Product Usage Instructions

Installation of the Grundfos 96348918 should only be performed after ensuring all electrical power is completely locked out. Remove the pump’s terminal box cover and carefully disconnect the internal wiring. When mounting the new board, it is vital to apply the included thermal paste to the heat sink contact points to prevent the power modules from overheating. Secure the board using the provided screws and reconnect the motor and sensor leads according to the wiring diagram inside the cover. After reassembly, the pump parameters may need to be initialized using the Grundfos GO Remote app or the onboard control panel.

Frequently Asked Questions Q&A

Q: Does this kit include the cooling fan? A: This kit typically focuses on the PCB and mounting hardware; however, in the “Large” HM kits, a cooling fan is often recommended for replacement at the same time and may be sold separately depending on the specific pump frame.

Q: Can this board be used for different motor power ratings? A: The “Large” kit is designed for a specific range of motor frame sizes. You must verify that the 96348918 part number matches the data plate of your specific pump or motor.

Q: How do I know if my existing board has failed? A: Common symptoms include “Internal Fault” alarms on the display, failure of the pump to start despite receiving power, or visible burn marks on the electrolytic capacitors.

Related Product News

Grundfos is increasingly focusing on “Intelligent Pumping” by integrating advanced connectivity into their latest control boards. While the 96348918 remains a standard service item for the existing HM fleet, new firmware updates now allow these boards to better communicate with Building Management Systems (BMS) via Grundfos CIM/CIU communication modules. This effort is part of a global initiative to reduce energy consumption in water infrastructure by up to 30% through more responsive motor control and predictive maintenance alerts generated directly from the control board.

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