DucoBox Energy Error Codes and Troubleshooting Guide
This document provides a comprehensive overview of error codes for the DucoBox Energy ventilation system, along with solutions and troubleshooting steps. It covers both the DucoBox Energy Comfort (Plus) and DucoBox Energy Premium models.
Table of Contents
The document is organized into sections covering error code overviews, solutions, and detailed explanations for various components.
01 Overview of Error Codes
This section presents a table of common error codes, their descriptions, and the corresponding solutions. Each error entry includes a reference to more detailed information within the document.
| Error Code | Error Type | Description of Error and Problem Statement | Solution |
|---|---|---|---|
| No error code | / | The DucoBox Energy is powered on but does not respond. | Check and/or replace the printed circuit board, see page 20 |
| 1.4.1 | error | No response from the extraction fan; check and/or replace the extraction fan. | Check and/or replace the fan, see page 9 |
| 3.1.1 | error | The temperature sensor value of the ODA (outside air intake to the unit) is too low; check and/or replace the sensor. | Check and/or replace the temperature sensor, see page 12 |
| 3.1.2 | error | The temperature sensor value of the ODA (outside air intake to the unit) is too high; check and/or replace the sensor. | Check and/or replace the temperature sensor, see page 12 |
| 3.1.3 | error | The ODA temperature sensor (outside air intake to the unit) cannot be read; check and/or replace the sensor. | Check and/or replace the temperature sensor, see page 12 |
| 3.1.4 | error | The ODA temperature sensor (outside air intake to the unit) has been measuring the same temperature for a long time; check and/or replace the sensor. | Check and/or replace the temperature sensor, see page 12 |
| 3.1.5 | error | The ODA temperature sensor (outside air intake to the unit) is short-circuited; check and/or replace the sensor. | Check and/or replace the temperature sensor, see page 12 |
| 3.1.6 | error | The ODA temperature sensor (outside air intake to the unit) has a poor connection; check and/or replace the sensor. | Check and/or replace the temperature sensor, see page 12 |
| 4.1.1 | error | The temperature sensor value of the ETA (extraction air from the house to the unit) is too low; check and/or replace the sensor. | Check and/or replace the temperature sensor, see page 12 |
| 4.1.2 | error | The ETA temperature sensor value (extraction air from the house to the unit) is too high; check and/or replace the sensor. | Check and/or replace the temperature sensor, see page 12 |
| 4.1.3 | error | The ETA temperature sensor (extraction air from the house to the unit) cannot be read; check and/or replace the sensor. | Check and/or replace the temperature sensor, see page 12 |
| 4.1.4 | error | The ETA temperature sensor (extraction air from the house to the unit) has been measuring the same temperature for a long time; check and/or replace the sensor. | Check and/or replace the temperature sensor, see page 12 |
| 4.1.5 | error | The ETA temperature sensor (extraction air from the house to the unit) is short-circuited; check and/or replace the sensor. | Check and/or replace the temperature sensor, see page 12 |
| 4.1.6 | error | The ETA temperature sensor (extraction air from the house to the unit) has a poor connection; check and/or replace the sensor. | Check and/or replace the temperature sensor, see page 12 |
| 6.1.1 | error | The temperature sensor value of the EHA (exhaust air from the house to the outside) is too low; check and/or replace the sensor. | Check and/or replace the temperature sensor, see page 12 |
| 6.1.2 | error | The EHA temperature sensor value (exhaust air from the house to the outside) is too high; check and/or replace the sensor. | Check and/or replace the temperature sensor, see page 12 |
| 6.1.3 | error | The EHA temperature sensor (exhaust air from the house to the outside) cannot be read; check and/or replace the sensor. | Check and/or replace the temperature sensor, see page 12 |
| 6.1.4 | error | The EHA temperature sensor (exhaust air from the house to the outside) has been measuring the same temperature for a long time; check and/or replace the sensor. | Check and/or replace the temperature sensor, see page 12 |
| 6.1.5 | error | The EHA temperature sensor (exhaust air from the house to the outside) is short-circuited; check and/or replace the sensor. | Check and/or replace the temperature sensor, see page 12 |
| 6.1.6 | error | The EHA temperature sensor (exhaust air from the house to the outside) has a poor connection; check and/or replace the sensor. | Check and/or replace the temperature sensor, see page 12 |
| 16.1.1 | error | The extraction pressure sensor value is too low; check and/or replace the sensor. | Check and/or replace the pressure sensor, see page 12 |
| 16.1.2 | error | The extraction pressure sensor value is too high; check and/or replace the sensor. | Check and/or replace the pressure sensor, see page 12 |
| 16.1.3 | error | The extraction pressure sensor cannot be read; check and/or replace the sensor. | Check and/or replace the pressure sensor, see page 12 |
| 16.1.4 | error | The extraction pressure sensor has been measuring the same value for a long time; check and/or replace the sensor. | Check and/or replace the pressure sensor, see page 12 |
| 16.1.5 | error | The extraction pressure sensor is short-circuited; check and/or replace the sensor. | Check and/or replace the pressure sensor, see page 12 |
| 16.1.6 | error | The extraction pressure sensor has a poor connection; check and/or replace the sensor. | Check and/or replace the pressure sensor, see page 12 |
| 28.4.1 | error | No response from the air intake fan; check and/or replace the air intake fan. | Check and/or replace the fan, see page 9 |
| 29.1.1 | error | The air supply pressure sensor value is too low; check and/or replace the sensor. | Check and/or replace the pressure sensor, see page 12 |
| 29.1.2 | error | The air supply pressure sensor value is too high; check and/or replace the sensor. | Check and/or replace the pressure sensor, see page 12 |
| 29.1.3 | error | The air supply pressure sensor cannot be read; check and/or replace the sensor. | Check and/or replace the pressure sensor, see page 12 |
| 29.1.4 | error | The air supply pressure sensor has been measuring the same value for a long time; check and/or replace the sensor. | Check and/or replace the pressure sensor, see page 12 |
| 29.1.5 | error | The air supply pressure sensor is short-circuited; check and/or replace the sensor. | Check and/or replace the pressure sensor, see page 12 |
| 29.1.6 | error | The air supply pressure sensor has a poor connection; check and/or replace the sensor. | Check and/or replace the pressure sensor, see page 12 |
| 30.1.1 | error | The temperature sensor value of the SUP (supply air from the unit to the house) is too low; check and/or replace the sensor. | Check and/or replace the temperature sensor, see page 12 |
| 30.1.2 | error | The SUP temperature sensor value (supply air from the unit to the house) is too high; check and/or replace the sensor. | Check and/or replace the temperature sensor, see page 12 |
| 30.1.3 | error | The SUP temperature sensor (supply air from the unit to the house) cannot be read; check and/or replace the sensor. | Check and/or replace the temperature sensor, see page 12 |
| 30.1.4 | error | The SUP temperature sensor (supply air from the unit to the house) has been measuring the same temperature for a long time; check and/or replace the sensor. | Check and/or replace the temperature sensor, see page 12 |
| 30.1.5 | error | The SUP temperature sensor (supply air from the unit to the house) is short-circuited; check and/or replace the sensor. | Check and/or replace the temperature sensor, see page 12 |
| 30.1.6 | error | The SUP temperature sensor (supply air from the unit to the house) has a poor connection; check and/or replace the sensor. | Check and/or replace the temperature sensor, see page 12 |
| 31.19.1 | warning | Replace the filters. | See maintenance instructions |
| 32.10.1 | warning | Outside temperature too low - ventilation is deactivated for 8 hours. | / |
| 33.10.1 | error | Outside temperature too low - ventilation is permanently deactivated. Restart the DucoBox later. | / |
| 35.17.1 | error | The temperature sensor value is too low; check and/or replace the sensor. | / |
| 35.17.2 | error | The temperature sensor value is too high; check and/or replace the sensor. | / |
| 35.17.3 | error | The temperature sensor value cannot be read; check and/or replace the sensor. | / |
| 36.24.1 | error | Connection to the weather station has been lost. Check the connection. | / |
| 36.24.2 | error | Connection to the outdoor temperature sensor is broken. Check the connection. | / |
| 37.17.1 | error | The CO₂ sensor value is too low; check and/or replace the sensor. | Check and/or replace the control unit/wall sensor, see page 18 |
| 37.17.2 | error | The CO₂ sensor value is too high; check and/or replace the sensor. | Check and/or replace the control unit/wall sensor, see page 18 |
| 37.17.3 | error | The CO₂ sensor value cannot be read; check and/or replace the sensor. | Check and/or replace the control unit/wall sensor, see page 18 |
| 40.17.1 | error | The humidity sensor value is too low; check and/or replace the sensor. | Check and/or replace the control unit/wall sensor, see page 18 |
| 40.17.2 | error | The humidity sensor value is too high; check and/or replace the sensor. | Check and/or replace the control unit/wall sensor, see page 18 |
| 40.17.3 | error | The humidity sensor value cannot be read; check and/or replace the sensor. | Check and/or replace the control unit/wall sensor, see page 18 |
| 42.22.1 | error | The number of connected dampers is too high. The maximum number is indicated in the manual. | See the installation manual for DB Energy Comfort (Plus) or the installation manual for DB Energy Premium |
| 42.22.2 | error | The number of connected dampers is too low. The minimum is 2. | See the installation manual for DB Energy Comfort (Plus) or the installation manual for DB Energy Premium |
| 43.23.1 | warning | Calibration has not yet taken place or has failed. Perform the adjustment (again). | See the installation manual for DB Energy Comfort (Plus) or the installation manual for DB Energy Premium |
| 43.23.2 | warning | The desired airflow cannot be achieved. Check the complete installation. | See the installation manual for DB Energy Comfort (Plus) or the installation manual for DB Energy Premium |
| 44.6.1 | error | There is no connection with the Duco pre-heater. Check the connection. | See the installation manual for DB Energy Comfort (Plus) or the installation manual for DB Energy Premium |
| 44.6.2 | error | A Duco pre-heater is connected to the DucoBox. Go to "settings" to configure it. | See the installation manual for DB Energy Comfort (Plus) or the installation manual for DB Energy Premium |
02 Overview of Solutions
This section details the solutions for various error codes, often referring back to specific components or troubleshooting steps.
02.A Schematic Representation (Printed Circuit Board and Wiring) of the DucoBox Energy
Diagrams illustrating the internal wiring and component layout for both the DucoBox Energy Comfort (Plus) and DucoBox Energy Premium models are provided.
DucoBox Energy Comfort (Plus) Wiring Diagram:
The diagram shows connections for FAN 1, FAN 2, power connector (PE, N, L), and control connectors (GND, 0-10V PWM, 10V, Tachymeter).
DucoBox Energy Premium Wiring Diagram:
Similar to the Comfort (Plus) model, this diagram illustrates the connections for FAN 1, FAN 2, power connector (PE, N, L), and control connectors (GND, 0-10V PWM, 10V, Tachymeter).
02.B Check and/or Replace the Fan
This section addresses error codes 1.4.1 and 28.4.1, which relate to fan issues.
Complementary Explanations: The confirmation signal from the fan is missing, or the fan cannot reach the required speed. The speed (rpm) can optionally be read via the Duco Network Tool.
Possible Causes:
- Fan power or communication wires are not properly connected.
- The fan motor is blocked or faulty.
- The pressure sensor is damaged.
- The mains voltage of the DucoBox is abnormal.
- The DucoBox printed circuit board is damaged.
- Air ducts to and from the DucoBox are blocked.
- The fan or fan cable is physically damaged.
Instructions of Service (Error Codes 1.4.1 / 28.4.1):
A flowchart guides the user through checking fan connections, motor blockage, and rotation. If the error persists, replacement of the fan is recommended, with references to maintenance guides.
02.C Check and/or Replace the Temperature Sensor
This section covers error codes 3.1.1 to 3.1.6, 4.1.1 to 4.1.6, 6.1.1 to 6.1.6, and 30.1.1 to 30.1.6, all related to temperature sensors.
Complementary Explanations: The temperature sensor is not read correctly by the DucoBox, or the connection between the DucoBox and the temperature sensor is interrupted.
Possible Causes:
- The temperature sensor is damaged.
- The connection to the temperature sensor is interrupted.
- The DucoBox Energy printed circuit board is damaged.
Instructions of Service (Error Codes 3.1.x / 4.1.x / 6.1.x / 30.1.x):
A troubleshooting process involves checking if temperature values can be read on the DucoBox screen, verifying the realism of the measured values, and checking the DucoBox configuration. Solutions include cleaning the sensor, replacing it, or contacting DUCO service.
A table provides temperature (°C) and resistance (Ohm) values for temperature sensors, useful for diagnostics.
02.D Check and/or Replace the Pressure Sensor
This section addresses error codes 16.1.1 to 16.1.6 and 29.1.1 to 29.1.6, related to pressure sensors.
Complementary Explanations: The ETA or SUP pressure sensor is not read correctly by the DucoBox, or the connection between the DucoBox and the pressure sensor is interrupted.
Possible Causes:
- Air leaks in and around the DucoBox (e.g., negligent installation of the front panel).
- The pressure sensor was not correctly installed in the housing.
- The connection to the pressure sensor is interrupted.
- An air duct to or from the DucoBox is blocked.
- The pressure sensor is damaged or dirty.
- The DucoBox Energy printed circuit board is damaged.
Instructions of Service (Error Codes 16.1.x / 29.1.x):
Troubleshooting involves checking if pressure values can be read, performing calibration, and verifying stable operation. Solutions include checking connections, replacing the sensor, or contacting DUCO service.
02.E Check and/or Replace the Control Unit/Wall Sensor
This section covers error codes 37.17.1 to 37.17.3 and 40.17.1 to 40.17.3, related to control units and wall sensors.
Complementary Explanations: The measured value of the wall sensor is too high, too low, or cannot be read correctly by the DucoBox, via the Duco Network Tool, or via the Duco Installation App.
Possible Causes:
- The wall sensor is damaged.
- The (wired) connection between the DucoBox and the wall sensor is interrupted.
- The wall sensor is outside the RF range of the DucoBox.
- The wall sensor is exposed to direct sunlight.
Instructions of Service (Error Codes 37.17.x / 40.17.x):
Troubleshooting includes checking if the sensor is wired, measuring voltage, checking communication wiring, and performing a power cycle. Solutions involve checking connections, replacing the sensor, or ensuring proper RF signal strength.
02.F Check and/or Replace the Printed Circuit Board
This section addresses situations where the screen does not start and/or no LED indicator is lit on the DucoBox printed circuit board.
Complementary Explanations: The screen does not start and/or no LED indicator is lit on the DucoBox printed circuit board.
Possible Causes:
- Poor connection of the power cables to the DucoBox printed circuit board.
- The screen is damaged.
- There is no mains voltage on the DucoBox Energy.
- The DucoBox Energy printed circuit board is damaged.
Instructions of Service:
The troubleshooting process involves checking if the DucoBox is powered by the mains, if the printed circuit board responds to manual actions, and verifying power supply connections. Solutions include checking fuses, reconnecting power cables, replacing the screen, or replacing the printed circuit board.
Wiring Diagrams
Detailed wiring diagrams are provided for both the DucoBox Energy Comfort (Plus) and DucoBox Energy Premium models, illustrating the connections of various components.
Contact Information
For warranty, installation, technical data, and service inquiries, please refer to www.duco.eu. Installation, connection, maintenance, and repairs should be performed by an authorized installer. Ensure the product is correctly installed according to the installation manual before consulting the maintenance manual.
