What happens when Swegon Air Handlers have an external emergency stop/fire alarm?
If your Swegon Air Handlers unit shows an external emergency stop or fire alarm, it means the external emergency stop has been enabled. The alarm will clear automatically once the external emergency stop or the fire alarm condition is resolved. An info alarm might remain afterwards.
Why is my Swegon Air Handlers post heater showing an error?
A post heater error in your Swegon Air Handlers indicates that the supply air is too hot, there's a control/air heater fault, or the overtemperature protection has tripped. As a result, the ventilation unit will run in a restricted operating mode.
Why is my Swegon Air Handlers preheater showing an error?
A preheater error in your Swegon Air Handlers unit suggests a control/air heater fault or that overtemperature protection has tripped. Contact a service company and check the function of the air heater for reheating and preheating.
What to do if Swegon Air Handlers show alarms T1...T8 sensor fault?
If your Swegon Air Handlers unit displays alarms indicating a T1...T8 sensor fault, it means the sensor is defective or the cable is loose/not connected. Contact a service company.
What to do if Swegon Air Conditioner shows internal fault?
If the Swegon Air Conditioner displays 'Internal fault', try restarting the ventilation unit. If the error persists, contact a service company.
What to do if Swegon Air Conditioner shows contact fault?
If the Swegon Air Conditioner displays 'Contact fault', try restarting the ventilation unit. If the error persists, contact a service company.
How to reset external emergency stop/fire alarm on Swegon Air Conditioner?
When 'External emergency stop/ fire alarm' is triggered on your Swegon Air Conditioner, the alarm clears automatically when the external emergency stop or the fire alarm ceases.
What to do if Swegon Air Handlers show a freeze risk for a water-heated air heater?
If you see a freeze risk warning for your Swegon Air Handlers' water-heated air heater, especially when the outdoor temperature is below 0 °C, it means the water temperature has dropped below the alarm limit. Make sure the circulation pump in the waterborne heating system is running and that the water supply to the ventilation unit’s air heater is sufficiently hot.
What to do for a Swegon Air Handlers service reminder?
Your Swegon Air Handlers unit is indicating a service reminder. Service the ventilation unit and acknowledge the service reminder.
What to do if my Swegon Air Handlers extract air fan is faulty?
If your Swegon Air Handlers unit indicates a faulty extract air fan, it means there is no speed signal from the fan. Try restarting the ventilation unit.
Only qualified personnel should carry out installation, configuration and commissioning.
Isolate unit from supply grid before performing electrical tests or work.
Ensure power is isolated before opening for service. Wait for fans to stop.
Unit has freeze protection, fan thermal overload, and electric air heater overload protection.
Install in space > +10°C, with drain. Avoid noise transfer to living areas.
Mount using an accessory wall mounting bracket on a reinforced wall.
Mount using an accessory ceiling mounting frame with threaded rods.
Mount panels using modular cables, up to 40m from the unit.
Set airflows using sizing curves and appropriate measurement equipment.
Set fan speeds for all modes (Away, Home, Boost) in commissioning mode.
Setting of Smart functions must be performed.
Select available functions from the "Smart functions" menu.
Controls ventilation based on CO₂ levels, requires CO₂ sensor.
Boosts ventilation based on humidity levels, requires humidity sensor.
Boosts ventilation variably according to indoor air quality, requires sensor.
Balances ventilation when cooker hood is used to improve fume extraction.
Enable DDC control for remote operation and temperature reduction.
Isolate power supply before opening for service. Wait for fans to stop.
Replace filters every six months; use only recommended Swegon filters.
Check heat exchanger condition, clean passages if clogged, do not damage fins.
Disruptions indicated by symbols; active alarms prevent standby mode.
Malfunctions may be caused by any system component or installation. Contact service if issues persist.
Presents fan performance curves for W4 and W4 Econo models.
Provides sound power levels emitted to supply, extract, and outdoor air ducts.
Explains control functions for accessories like fireplace switch, sensors, damper actuators.
Details DDC control, temperature control, and fan speed signals.
Control diagram for W4 model, including components and functions.
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