Why does the wireless display show the wrong temperature on OSTBERG HERU 100 S EC Air Handlers?
When the unit starts, the wireless display shows the wrong temperature because the unit is not correctly installed. All electrical installations must be performed by a qualified electrician. Order reinstallation if needed.
What to do if OSTBERG HERU 100 S EC are overheating?
If your OSTBERG Air Handlers are overheating, the overheating protection in the electric after heater may have been triggered. Cut power to the unit, check if the manual overheating protection in the electric after heater has triggered, reset the manual overheating protection, and then reset the alarm.
How to troubleshoot motor failure in OSTBERG HERU 100 S EC Air Handlers?
If you're experiencing motor failure in your OSTBERG Air Handlers, it could be due to no power or signal to the fans and quick connectors, or a blocked fan wheel. Check that the fan is working and correctly connected (replace if broken), and ensure the fan wheel turns freely.
Why is the rotor temperature low in OSTBERG HERU 100 S EC Air Handlers?
A low rotor temperature in OSTBERG Air Handlers can be caused by dirty filters, a slipping rotor belt, or a stuck rotor. Try changing the filters, replacing the rotor belt, and ensuring that the rotor can rotate freely.
What causes freeze protection activation in OSTBERG HERU 100 S EC?
If the freeze protection is activated in your OSTBERG Air Handlers, it may be due to insufficient heat capacity in the heating coil or a valve actuator that isn't opening correctly. Ensure that the heating coil and valve actuator are working before start-up.
How to resolve freeze protection issues in OSTBERG Air Handlers?
If your OSTBERG Air Handlers is experiencing freeze protection issues, it could be due to insufficient heat capacity in the heating coil or the valve actuator not opening correctly. Ensure that the heating coil and the valve actuator are working before start-up.
What does 'sensor shorted' mean on OSTBERG HERU 100 S EC Air Handlers?
A 'sensor shorted' message on your OSTBERG Air Handlers means that the connection to the relay card has been broken, or the sensor itself is broken. Check which sensor is activated and the connection to the relay card. If the fault remains, change the broken sensor.
What to do if OSTBERG Air Handlers triggers a fire alarm?
If your OSTBERG Air Handlers triggers a fire alarm, it could be due to the fire alarm access being activated or an alarm signal from external alarm units. Check that the correct input function has been selected and ensure that the external alarm units are working as they should before start-up.
What causes low rotor temperature in OSTBERG Air Handlers?
Low rotor temperature in OSTBERG Air Handlers can be caused by dirty filters, a slipping rotor belt, or a stuck rotor. Change the filters, replace the rotor belt, and ensure that the rotor can rotate freely.
What to do if my OSTBERG HERU 100 S EC Air Handlers unit does not start?
If your OSTBERG Air Handlers unit isn't starting, the possible causes are: the unit receives no power, the activate mode is set to “Off”, or the unit is not correctly connected. Check the fuse, residual current device, and connections to ensure the unit is receiving power. Change the mode to “On.” Ensure the unit is correctly connected.
The energy recovery units HERU S and HERU T are designed for supply air and exhaust air ventilation with cooling and heat recovery.
Details temperature regulation modes and fan capacity control methods for the HERU units.
The air temperature can be regulated for constant supply, room, or exhaust air. Five modes are available.
Describes minimum airflow, basic setting, maximum airflow, and control via program planner or sensors.
Defines WARNING for personal injury risk and CAUTION for equipment damage risk.
Covers user restrictions, sharp edges, protective gloves, power disconnection, and qualified electricians.
Confirms product compliance with EU directives and harmonised standards.
Covers manufacturing and material faults occurring during the warranty period.
Limits provider's liability and excludes injury/damage to people or property.
Applies to normal use; excludes transport, misuse, user errors, and unauthorized repairs.
Conditions apply according to the agreement with the local dealer.
Steps for notifying faults to dealer, shipping damage, and requirements for warranty repair.
Guide to downloading and setting up the IQ Control App for unit control.
Instructions for pairing the smartphone app with the HERU Bluetooth gateway using PIN 123456.
Procedure for setting language, time, measurement system, and time zone.
Overview of the IQ Control App interface, including home screen, status bar, and hotkeys.
Shows status and hotkeys. Symbols for cloud connection, Bluetooth, air quality, modes, and alarms are displayed.
How to set desired temperature using the thermometer icon and adjust comfort/economy temperatures.
Explains how to activate boost mode, change its operating time, and its purpose.
Press the Boost icon to activate boost mode. A green circle indicates active mode.
Procedure to change boost operating time via Settings > Service > code 1199.
Details on activating overpressure mode and changing its operating time and offset value.
Press the Overpressure icon to activate. A green circle indicates active mode.
Procedure to change overpressure time and offset value via Settings > Service > code 1199.
How to activate and deactivate Away mode, which overrides program planner if active simultaneously.
Setting up weekday and holiday schedules for comfort or economy modes.
Temperature regulated boost using cold outdoor air for cooling when conditions are met.
Guides on activating the internal electric heater and the aftercooling function.
Steps for starting and stopping the unit using the safety switch or IQ Control App.
How to view, reset, and manage active and historical alarms via the Alarms menu.
Procedure to modify various unit settings through the Settings menu.
Methods for updating the unit's firmware using the IQ Control App or other devices.
Schedule for regular inspections: supply/exhaust air check every six months, fan/filter cleaning annually.
Detailed procedures for six-month and annual maintenance tasks.
Visually inspect the function of supply air and exhaust air systems.
Annual task involves cleaning fans and replacing filters.
Lists necessary tools and disposable items required for maintenance procedures.
Steps to safely open the unit's covers and doors for HERU S and HERU T models.
Procedure for removing filters and fans, including safety precautions.
Information on available accessories and spare parts and where to find them.
For current technical data, please see www.ostberg.com.
Explains alarm types (A, B) and provides a table of alarms, causes, and operations.
Lists common hardware failures, their causes, and recommended operations for resolution.
A flowchart to diagnose and resolve unit issues by following a decision tree.
Configure sensor type and limit value for fan compensation based on air quality.
Set up after-heater, pre-heater, and cooling functions based on installed components.
Define temperature regulation type (Supply, Exhaust, Room) and control parameters.
Set maximum temperature limits, economy set points, and supply air low temperature thresholds.
Configure external inputs for contact functions and signal types for various operational modes.
Assign alarm classes (critical or non-critical) to specific alarms.
Select filter control type: Period, Diff. switch, Diff. sensor, or Speed increase.
Set opening time for dampers as a start-up delay for the extract air fan.
Configure flow direction (Standard/Opposite) for ventilation units.
Set standard fan speeds for supply and exhaust airflow.
Set minimum fan speeds for supply and exhaust airflow.
Set maximum fan speeds for supply and exhaust airflow.
Option to save or discard settings made during the setup wizard.
General| Airflow Capacity | 100 m³/h |
|---|---|
| Voltage | 230 V |
| Frequency | 50 Hz |
| Weight | 12 kg |
| Motor | EC Motor |
| Max. ambient temperature | 40°C |
| Duct connection diameter | 125 mm |
| Power Consumption | 15 W |
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