RADEMACHER 9485 Instruction Manual For The Electrical Connection And For Commissioning page 124

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22. Error messages
Error 4
The temperature sensor provides invalid readings.
◆ Carry out a hardware reset, see page 121.
◆ If an optional external temperature sensor (Remote Sensor
9485-F) is connected, please check the cabling.
◆ Please contact the RADEMACHER Service department if
only the internal sensor is used and the problem still
persists, see page 128.
◆ The readings of the sensors can be checked in menu 9.7.7,
see page 91.
◆ The controller switches to an emergency mode in the event
of a faulty sensor by switching on for 6 minutes (30%) and
switching off for 14 minutes (70%). This prevents excessive
cooling of the room and overheating of the floor.
124
EN