Mother Board 230 V H2 – code: FH2KMB23 – HP Watermakers

230 V H2 Mother Board (FH2KMB23) for HP Watermakers

The 230 V H2 Mother Board with code FH2KMB23 is the logic and power motherboard used as an original replacement in automatic HP Watermakerssystems. It coordinates the system's main control functions, handling sensor inputs and commands to actuators and loads within the H2.

This board is intended for interventions of maintenance, restoration or replacement work on existing systems where the manufacturer's architecture and control logic must be retained.

Main features and details

Identifying data

• Manufacturer / Brand: HP High Pressure S.r.l. (HP Watermakers)
• Official spare part code: FH2KMB23
• Power Supply: 230V AC single-phase nominal (50 / 60 Hz)
• Main application: logic and power motherboard for automatic systems

Platform and system integration

The FH2KMB23 belongs to the H2 platform and operates as the central management unit, communicating with peripherals and modules provided by the manufacturer's architecture, including FH2KT series keypads and RP Tronic.

Protection and treatment

The board features a surface treatment against salinity and condensation, designed for use in environments where humidity and marine atmosphere may be present.

Managed inputs and outputs

Safety and control inputs

• Pressure sensor reading (transducers 4–20 mA)
• Flow meter reading
• Probe reading TDS (conductivity)

Power / relay outputs

• Motor pump contactor control
• Washing solenoid valve control
• Drain valve control

Functions coordinated by the board

Within the system, it FH2KMB23 manages the automatic desalination cycle by coordinating control routines and operational sequences. In particular, the board can manage:

• Progressive start-up: feed pump command (low pressure) and, after verifying the absence of air bubbles, excitation of the high-pressure pump contactor at 230V.
• Pressure regulation (RP TRONIC®): dialogue with the stepper motor of the RP Tronic automatic control valve to modulate opening/closing and maintain stable operating pressure (in the application context indicated by the manufacturer).
• Salinity analysis (TDS): processing of the analog signal from the conductivity probe and management of the deviation of the produced water (sending to tanks or discharge) based on the detected quality.
• Automatic washing cycles (flushing): management of timers and solenoid valves dedicated to periodic membrane washing with fresh water, according to the logic provided by the system.

Applications and compatibility (HP systems)

This 230V board is indicated as an original spare part for automatic systems powered by onboard AC network (e.g., generator or dock), in the ranges listed below.

Declared compatibility

• HP UC (Under Compact) automatic: models UC 35, UC 50, UC 70 at 230V
• HP SC (Super Compact) automatic: models SC 70, SC 100, SC 140 at 230V

Note: for a precise compatibility check, it is good practice to always compare spare part code FH2KMB23 and system configuration (H2 platform, connected peripherals) before ordering or installation.

Advantages for maintenance and spare parts

• Spare part identified by official code: useful to reduce ambiguity during procurement and replacement.
• Centralized management: integrates control logic and power commands in a single component, according to the HP architecture.
• Integration with H2 platform: designed to communicate with FH2KT keyboards and RP Tronic systems provided by the system.
• Anti-salinity/anti-condensation treatment: suitable for technical environments where humidity and salt spray may be present.

Usage and operational notes

The FH2KMB23 Mother Board is an electronic component intended for installation in automatic desalination systems. For correct and safe interventions:

• verify that the system is powered at 230V AC and that the requested board is indeed the version H2 with code FH2KMB23;
• check the presence and correct connection of the expected sensors/actuators (4–20 mA transducers, flow meters, TDS probe, solenoid valves, contactor);
• in case of replacement, document wiring and connections before disassembly, to restore the original configuration;
• entrust installation and diagnosis to qualified personnel, especially on board systems and in the presence of AC power supply.

For technical requests or to confirm the spare part, it is useful to always indicate SKU HP000000021 and code FH2KMB23.

FAQ – Frequently Asked Questions

What is the official spare part code for the Mother Board 230 V H2?

The official spare part code indicated by the manufacturer is FH2KMB23.

What power supply is this board intended for?

The board is designed for nominal single-phase 230V AC, with a frequency of 50/60 Hz.

With which systems/architecture does the FH2KMB23 communicate?

It is part of the H2 platform and communicates with FH2KT series keyboards and RP Tronic systems, according to the system configuration.

What signals and devices can it manage?

It manages inputs from 4–20 mA transducers, flow meters, and TDS probes, and controls the pump contactor, washing solenoid valves, and drain valve.

Which HP systems is it listed as compatible with?

It is indicated as the original spare part for automatic 230V systems of the HP UC (UC 35, UC 50, UC 70) and HP SC (SC 70, SC 100, SC 140) ranges.