1. Introduction
This manual provides comprehensive instructions for the installation, operation, maintenance, and troubleshooting of the JFZTPVAK InteliNano NT MRS3 Genset Control (IN-NT-MRS3). This device is designed for reliable control and monitoring of generator sets. Please read this manual thoroughly before using the product to ensure safe and efficient operation.
2. Safety Information
Always observe the following safety precautions to prevent injury or damage to the equipment:
- Installation and maintenance should only be performed by qualified personnel.
- Disconnect all power sources before performing any wiring or maintenance.
- Ensure proper grounding to prevent electrical shock.
- Do not operate the device in wet or explosive environments.
- Verify all connections are secure and correct before applying power.
3. Product Overview
The InteliNano NT MRS3 is a compact genset controller designed for single generating sets operating in manual and remote start applications. It provides comprehensive monitoring and protection features for the generator and engine.

Figure 3.1: Front Panel of InteliNano NT MRS3
This image displays the front panel of the InteliNano NT MRS3 controller, featuring a central LCD screen, navigation buttons (up/down arrows), and three primary control buttons: Stop (red 'O'), Auto/Reset (circular arrow), and Start (green 'I').

Figure 3.2: Angled View of InteliNano NT MRS3
An angled perspective of the InteliNano NT MRS3 controller, showing the front panel with its display and buttons, and a glimpse of the terminal blocks at the bottom for electrical connections.
3.1 Key Components
- LCD Display: Shows operational status, measurements, alarms, and menu options.
- Navigation Buttons: Up and Down arrows for menu navigation and value adjustment.
- Stop Button (Red 'O'): Stops the generator and resets alarms.
- Auto/Reset Button (Circular Arrow): Switches between manual and automatic modes, and can reset certain conditions.
- Start Button (Green 'I'): Initiates the generator start sequence.
4. Setup and Installation
Proper installation is crucial for the reliable operation of the InteliNano NT MRS3. Refer to the wiring diagrams provided with the product for specific connection details.

Figure 4.1: Rear Panel and Terminal Connections
This image shows the rear of the InteliNano NT MRS3 controller, highlighting the various green and orange terminal blocks for input/output connections, as well as a USB port for configuration. The model number 'IN-NT-MRS 3' and hardware version are visible on a label.
4.1 Mounting
The controller is designed for panel mounting. Cut an appropriate opening in the control panel and secure the unit using the provided mounting clips. Ensure adequate ventilation around the unit.
4.2 Wiring
- Power Supply: Connect the DC power supply to the designated terminals. Observe correct polarity.
- Engine Inputs: Connect engine sensors (oil pressure, water temperature, fuel level, etc.) to the analog input terminals.
- Generator Inputs: Connect voltage and current transformers to the generator measurement inputs.
- Outputs: Connect starter motor, fuel solenoid, and other control relays to the digital output terminals.
- Communication: Use the USB port for PC connection and configuration via dedicated software (if applicable).
Always double-check all wiring against the specific wiring diagram for your application before applying power.
5. Operating Instructions
5.1 Power On
Once correctly wired and mounted, apply power to the controller. The LCD display will illuminate, and the controller will perform a self-test.
5.2 Mode Selection
- Manual Mode: Press the Auto/Reset button until "Manual" is indicated on the display. In this mode, the generator is started and stopped manually.
- Auto Mode: Press the Auto/Reset button until "Auto" is indicated. In this mode, the controller will automatically start and stop the generator based on configured external signals (e.g., remote start signal, utility failure).
5.3 Starting the Generator (Manual Mode)
- Ensure the controller is in Manual mode.
- Press the Start (Green 'I') button. The controller will initiate the pre-heat (if configured), crank, and start sequence.
- Monitor the display for engine parameters and status.
5.4 Stopping the Generator
Press the Stop (Red 'O') button. The generator will enter a cool-down period (if configured) and then shut down. Any active alarms will be reset.
5.5 Navigation and Parameter Viewing
Use the Up and Down arrow buttons to scroll through various screens displaying engine parameters (e.g., RPM, oil pressure, coolant temperature, battery voltage), generator parameters (e.g., voltage, current, frequency, power), and event logs.
6. Maintenance
The InteliNano NT MRS3 controller is designed for minimal maintenance. However, regular checks are recommended to ensure optimal performance:
- Visual Inspection: Periodically inspect the controller for any signs of physical damage, loose connections, or corrosion.
- Cleaning: Keep the front panel clean and free of dust and debris. Use a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Firmware Updates: Check the manufacturer's website for any available firmware updates. Updates should be performed by qualified personnel.
- Battery Check: Ensure the generator's battery, which powers the controller, is in good condition and properly charged.
7. Troubleshooting
This section provides solutions to common issues. For more complex problems, contact technical support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Controller display is blank. | No power supply or faulty wiring. | Check DC power supply connections and voltage. Verify battery charge. |
| Generator fails to start. | Low fuel, low battery, engine fault, or incorrect mode. | Check fuel level, battery voltage. Verify engine fault codes on display. Ensure controller is in Manual or Auto mode with a valid start signal. |
| Generator stops unexpectedly. | Active protection alarm (e.g., high temperature, low oil pressure). | Check the display for alarm messages. Address the underlying engine or generator issue. Press the Stop button to reset alarms after resolving the fault. |
| Incorrect readings on display. | Faulty sensor or incorrect calibration. | Verify sensor connections and integrity. Check calibration settings via configuration software. |
8. Specifications
| Feature | Detail |
|---|---|
| Model | InteliNano NT MRS3 (IN-NT-MRS3) |
| Manufacturer | JFZTPVAK |
| ASIN | B0DPBYXFK3 |
| Package Dimensions | 1.18 x 0.79 x 0.39 inches |
| Item Weight | 1.76 ounces |
| Date First Available | November 30, 2024 |
9. Warranty and Support
For warranty information and technical support, please refer to the documentation provided with your purchase or contact JFZTPVAK customer service directly. Keep your purchase receipt as proof of purchase.
Contact Information: Please refer to the manufacturer's official website or product packaging for the most current contact details.





