Information

Furnace pressure monitor triggered

The furnace safety pressure monitor was tripped by an impermissible partial vacuum.

The unit switches off! Switching test active.

A switching test is being performed.

Forced operation active

Cyclic forced operation active. Any pumps and servomotors present are activated briefly to avoid them seizing up.

Frost protection, volumetric flow regulation

The heater power rating of the PTC heat register is too low for the current volumetric flow or the current outdoor temperature. The volumetric flow is therefore reduced to achieve the minimum air inlet temperature needed for frost protection.

Max. humidity value limit exceeded

The set max. humidity limit value was exceeded, excess humidity protection (increase in volumetric flow) is active.

Volumetric flow measurement active

Fans are operated in nominal ventilation level for a maximum of 3 hours.

Brine EHE, low cooling capacity

The cooling capacity of the brine EHE is too low. No cooling effect is achieved. Pump is blocked for one hour.

Communication: EnOcean

There is no communication between the EnOcean plug-in module and the main circuit board.

Communication KNX

There is no communication between the KNX plug-in module and basic circuit board.

Internet communication

There is no communication with the internet.

Communication ModBus

There is no communication with the Modbus components.

External safety shutdown

A connected external safety contact has tripped (terminal X2). There is no bridge on the control circuit board. The unit switches off.