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48 - EN
9. Malfunctions
9.1 Determine the CO
2
Sensor type
1. Activate the menu
3x
+
+ / /
2. Leave the menu
Wait 30 sec.
9.2 Malfunctions and alerts for the CO
2
C Sensor
Fault
Problem
Solution
All 4 LEDs flash orange (0.25Hz,
1x per 4s).
The CO
2
C Sensor is starting up.
Wait until the sensor has started
up (about 10s).
All 4 LEDs flash orange (1Hz,
1x per 1s).
Too many CO
2
C Sensors are
registered in a single zone (>8).
Set the zones correctly using
the ComfoControl App or
connect fewer CO
2
C Sensors.
All 4 LEDs flash red (1Hz, 1x
per 1s).
There is no communication via
ComfoNet.
Check the wiring and
connections.
All 4 LEDs flash red (0.25Hz,
1x per 4s).
The CO
2
C Sensor is defective.
Replace the CO
2
C Sensor.
In case of recurring malfunctions, please contact your local Zehnder representative.
type: RF 010 V C