8545 6-Key Remote-Control Instant Electric Water Heater PCBA

# Buy HS-HX-8545-ALL 6-Key Remote-Control Instant Electric Water Heater PCBA from SUNSAM

Buy a wide-voltage water heater control solution designed for smart showers, household bathroom heaters and customized hot-water appliances. SUNSAM combines water heater control development, firmware customization and PCBA manufacturing under one production system.

## Product Overview

The HS-HX-8545-ALL 6-Key Remote-Control Instant Electric Water Heater PCBA combines an HS-HX-8545-ALL-V1.0 main control board with a TR40-V1.0 TRIAC power board. The platform provides wide-voltage operation, three power settings, six preset temperature modes, touch control, remote-control support and fault diagnosis.

A separate TRIAC board manages the external heating load, while the main board processes water temperature, flow signals, user commands, display information and protection logic. The two-board architecture supports flexible installation inside compact water heater housings.

## AC 85–280 V Wide-Voltage Input

The selected switch-mode power supply configuration supports AC 85–280 V. Sample validation included continuous operation at AC 280 V for eight hours without abnormal performance.

A wide input range helps appliance manufacturers develop products for markets with different mains-voltage conditions. Final heater, TRIAC, wire, terminal and protective-device ratings must match the intended appliance power and target-market requirements.

## Three Configurable Power Settings

Available heating-power settings include:

- 4 kW

- 5 kW

- 6 kW

The default setting is 6 kW. Holding the Power key while the controller remains off opens the power-selection interface.

Multiple settings allow appliance manufacturers to match one control platform with several heater configurations. Final rated power depends on the heating element, power board, wiring, water channel and thermal structure.

## Six-Key Touch and Remote Control

Six touch positions provide Temperature Down, Temperature Up, Mode, 38°C Shortcut, 42°C Shortcut and Power functions. A 4 mm glass panel supports a clean front design and suitable touch sensitivity.

Remote-control support offers an additional operating method for wall-mounted heaters and bathroom applications. Remote handset type, communication protocol and supply scope require confirmation during each OEM or ODM project.

## Six Preset Temperature Modes

Six preset modes simplify temperature selection for different household uses:

- Comfort Mode: 40°C

- Child Mode: 38°C

- Elder Mode: 45°C

- Smart Mode: 42°C

- Kitchen Mode: 36°C

- Laundry Mode: 33°C

The adjustable temperature range covers 30–55°C. Dedicated 38°C and 42°C shortcut keys provide quick access to common temperature settings.

Preset names, target temperatures and mode order can be modified through firmware according to customer requirements and regional preferences.

## Flow-Based Heating Control

Heating starts at approximately 1.2–1.3 L/min and stops when water flow falls to approximately 0.9–1.0 L/min. A dedicated flow input confirms water movement before the heating process begins.

A low-flow indicator warns when water flow becomes insufficient. An excessive-flow indicator appears when maximum heating power cannot reach the selected temperature within the programmed time.

Flow warnings help users adjust the tap and help service teams distinguish hydraulic conditions from sensor or power-control faults.

## Digital Display and Operating Feedback

The display performs a full-screen check for approximately one second after power-up. The selected power level then appears briefly before the screen changes to real-time temperature information.

During operation, the screen can show outlet temperature, selected temperature, heating status, power information and mode indicators. Dynamic display elements provide visual feedback during heating.

When water flow changes, the control algorithm adjusts heating output to bring outlet temperature closer to the selected value.

## Automatic Temperature Learning and Memory

Automatic calibration allows the controller to learn constant-temperature parameters during initial operation. Parameter memory retains the selected temperature and operating mode for later use.

A 50 kΩ NTC sensor provides temperature feedback. Sensor characteristics, installation position, thermal contact and water-channel design influence final regulation accuracy.

## Protection and Fault Diagnosis

Available protection and diagnostic functions include:

- E1: Overtemperature protection

- E2: Leakage protection

- E3: Inlet temperature sensor fault

- E4: Outlet temperature sensor fault

- E0: Zero-crossing detection fault

- Communication fault detection

E1 protection activates an alarm and stops heating at 63°C or above. Heating can resume after outlet temperature falls to 55°C.

Leakage, sensor and zero-crossing faults activate an alarm and stop heating. Normal operation resumes after repair according to the relevant reset requirement.

Final safety performance depends on complete appliance grounding, leakage protection, insulation, hydraulic construction and certification for the destination market.

## Constant-Temperature Test Performance

Sample testing used inlet water at approximately 27°C. Test settings covered 36°C, 40°C, 45°C and 48°C at flow rates of 2.0 L/min and 3.0 L/min.

At 2.0 L/min, measured temperatures reached 35–37°C, 39–41°C, 44–47°C and 47–50°C. At 3.0 L/min, measured temperatures reached 35–37°C, 39–42°C, 44–48°C and 47–50°C.

Recorded stabilization times ranged from 3 to 30 seconds across the tested combinations. Actual performance can vary with inlet temperature, flow stability, selected power, supply voltage, sensor mounting and complete appliance construction.

## Environmental and Reliability Validation

The sample report records an operating-temperature range from −15°C to 65°C and a humidity range from 10% to 95% RH. High-temperature and high-humidity validation included eight hours at 65°C and 90% RH without abnormal operation.

Additional checks covered repeated power switching and whole-appliance dielectric validation at 1,800 V, 5 mA for one minute. Recorded results represent sample-level testing rather than independent product certification.

Final firmware, protection thresholds, remote-control configuration and component list require confirmation before mass-production release.

## Recommended Applications

Recommended applications include wall-mounted instant shower heaters, household bathroom water heaters, compact kitchen hot-water units, apartment water heaters and customized export-market appliances.

Six preset modes support product families serving children, elderly users, kitchens, laundry areas and general bathroom use. Remote-control capability also suits installations where direct access to the front panel may be inconvenient.

## OEM and ODM Development Support

SUNSAM provides hardware design, firmware development, component sourcing, PCB assembly, programming and functional testing for customized water heater controllers.

Available engineering changes can cover voltage range, power settings, preset temperatures, display artwork, key layout, flow thresholds, sensor parameters, fault logic, connectors and remote-control requirements.

Customers can provide appliance drawings, heater ratings, hydraulic structures, display designs and target-market standards. SUNSAM engineers can evaluate requirements and prepare a matched PCBA solution.

## Manufacturing and Production Capability

SUNSAM has 15 years of custom PCBA manufacturing experience. Instant electric water heater PCBAs represent about 70% of current production output, supporting focused engineering knowledge and established manufacturing processes.

Production resources cover SMT assembly, DIP insertion, wave soldering, programming, inspection and functional testing. Material traceability and in-process quality control support consistent production.

Engineering samples, pilot runs and volume orders can follow confirmed project schedules. Material purchasing and production capacity are arranged according to approved purchase orders and customer forecasts, avoiding unsupported stock claims.

## Why Choose the HS-HX-8545-ALL 6-Key Remote-Control Instant Electric Water Heater PCBA?

The control platform combines AC 85–280 V input, 4–6 kW power selection, six preset modes, touch keys, remote-control support, digital display, flow sensing, temperature memory and multiple protection functions.

A separate TR40-V1.0 TRIAC power board supports external load control, while configurable firmware gives appliance brands room for differentiated functions and user interfaces.

Explore more available solutions on the [SUNSAM Instant Electric Water Heater PCBA product page](https://www.sunsampcba.com/products.html).

## Request a Custom Quotation

Send SUNSAM the required voltage, heater power, display design, mode temperatures, remote-control requirements, flow conditions, sensor specifications and expected order quantity. The engineering team can prepare a customized proposal for the HS-HX-8545-ALL 6-Key Remote-Control Instant Electric Water Heater PCBA.

## Frequently Asked Questions

### 1. What input voltage does the controller support?

The selected switch-mode configuration supports AC 85–280 V. Final electrical design requires confirmation against the complete appliance specification.

### 2. Which power settings are available?

Available programmed settings include 4 kW, 5 kW and 6 kW. The default setting is 6 kW.

### 3. Which preset temperature modes are included?

Available presets include Comfort at 40°C, Child at 38°C, Elder at 45°C, Smart at 42°C, Kitchen at 36°C and Laundry at 33°C.

### 4. Does the controller support remote operation?

Yes. Remote-control commands are supported. Handset type, protocol and supply scope require confirmation for each project.

### 5. Which protection functions are available?

Available functions include overtemperature protection, leakage protection, inlet and outlet temperature sensor fault detection, zero-crossing detection and communication fault diagnosis.

### 6. Can the HS-HX-8545-ALL 6-Key Remote-Control Instant Electric Water Heater PCBA be customized?

Yes. SUNSAM can evaluate customized hardware, firmware, power settings, temperature modes, display layouts, key functions, sensors, flow thresholds, connectors and remote-control requirements for OEM and ODM projects.