ST650EX / ST650-CO
2
/ ST350EX
v3.16
29
Malfunction Cause Solution
The gas detection control system
produces an alarm while no gas is
present.
The connection cable is not
connected properly.
Ensure the cable is installed in
separate cable conduits, away
from possible interference
sources.
Check or replace the detector
cell.
department.
Status-LED flashes GREEN
Sensor is not connected
(properly)
Check the sensor and sensing
head connections.
The sensing head is not
Calibrate the sensing head.
Status-LED lights RED Sensor is not connected
Check the sensor connections.
Measurement value is too high
(overload)
No defect. The sensing head is
working properly. Ventilate the
area and disconnect the source.
Status-LED does not light or flash
The sensing head is not active Wait a while or restart the
Check the sensor and sensing
Electronic defect Contact the Consilium Service
department.