Secop 101N2130 Electronic Unit for BD1.4F-VSD Compressor

Quick Guide from the Manual

This document provides instructions for the Secop 101N2130 electronic unit, designed for BD1.4F-VSD compressors. It covers installation, electrical connections, configuration via PC software (TOOL4COOL), and troubleshooting. The unit is a dual-voltage device (12V/24V) with built-in thermal protection.

Installation

Mount the electronic unit directly onto the compressor plug. Secure it using at least two screws. Ensure the installation environment does not exceed an ambient temperature of 55°C.

Power Supply and Wiring

The unit must be connected directly to the battery poles. Observe the following requirements:

• Connect battery positive to + and negative to -.
• Install a 15A fuse in the positive cable as close to the battery as possible.
• If using a main switch, it must be rated for at least 20A.
• Avoid extra junctions in the power supply system to prevent voltage drops.
• Follow the wire dimension guidelines provided in the manual (Fig. 4) based on the distance between the battery and the unit.

Battery Protection

The compressor stops and restarts based on voltage limits. Standard settings are:

• 12V System: Cut-out at 9.6V, Cut-in differential 0.5V.
• 24V System: Cut-out at 19V, Cut-in differential 0.5V.

Thermostat and Setpoint

The thermostat connects between terminals C and T. You can use an NTC thermistor or a mechanical thermostat. The standard setting is Auto. If using an NTC, it is recommended to set the thermostat mode to NTC via software. A 10kΩ potentiometer can be connected between S-Input and C to configure the temperature shut-off setpoint without a PC.

Speed Selection

The factory default speed is 4,000 rpm. You can adjust the speed between 2,000 and 4,000 rpm using the TOOL4COOL software or by connecting a resistor (R1) between terminals C and P.

Fan Control

A 12V fan can be connected between terminals +(F) and F. The fan output is regulated to 12V regardless of the supply voltage. The fan can draw a continuous power of 6Wavg. Fan settings, including start delays and speed (40-100%), can be adjusted via TOOL4COOL.

Error Handling

If an operational error occurs, it can be read via the TOOL4COOL software or by connecting a 10mA LED between terminals D/I and +. The LED will flash to indicate the error code:

• 1 Flash: Battery protection cut-out.
• 2 Flashes: Fan over-current cut-out.
• 3 Flashes: Motor start error (rotor blocked or high differential pressure).
• 4 Flashes: Minimum motor speed error.
• 5 Flashes: Thermal cut-out of electronic unit.
• 6 Flashes: Thermostat failure.

Connecting TOOL4COOL

To configure the unit via PC:

1. Ensure the unit is powered off.
2. Start the TOOL4COOL software.
3. Disconnect any existing network connections in the software.
4. Select 'Connect Network' and choose the correct COM port.
5. Click 'Configure' and set 'Last network node address' to 1 and 'Refresh rate' to 3.
6. Power up the electronic unit.
7. The software will establish a connection within 15 seconds.