ENG
INSTALLATION MANUAL
29
Picture 23
- malfunction in communication link with the controller
If the display writes out (Picture 24), communication link
between room unit and controller isn’t established or the link isn’t
established properly.
Possible causes are:
- connection between room unit and controller is disconnected.
On the display does not appear the rectangular frame (Picture
25). Check the connection between room unit and controller.
Picture 25
Picture 24
- malfunction of the auxiliary temperature sensor,
connected to the room unit
When the display writes out (Picture 26), auxiliary (external)
temperature sensor is in malfunction or isn’t connected. Check the
connection and resistance of the sensor.
Picture 26
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