Use this table to help diagnose a suspected fault. If you’re unable to find the fault in the table, or the suggested fix doesn’t work, email support@aeroqual.com.
| Fault | Possible causes | Solutions |
|---|---|---|
| No power | Power supply failure Sensor damaged | Replace 12 VDC plug pack Replace sensor board |
| Sensor failure (status LED flashes quickly) | Sensor needs warming up Air contaminated Sensor damaged | Run sensor for 24 hours in clean air Move sensor to a clean environment Replace sensor board |
| Reading high in clean air | Insufficient warm up Air contaminated Sensor damaged | Run sensor for 24 hours in clean air Move the sensor to clean air environment Replace sensor board |
| Reading lower than expected | Gas concentration is lower than expected Interfering gas present Sensor calibration incorrect | Sensor is working properly Interfering gas needs to be compensated/removed Replace sensor board |
| Reading higher than expected | Gas concentration is higher than expected Interfering gas present Sensor calibration incorrect | Sensor is working properly Interfering gas needs to be compensated/removed Replace sensor board |
| Reading unstable | Power supply unstable Local airflow is unstable EMF interference is high | Replace power supply Shield unit from airflow Shield unit from interference |