Common faults and error signaling in AVANSA 100M and 200M detectors

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Gas detectors AVANSA 100M and 200M are key components of safety systems in households and industrial facilities, but their flawless operation depends on the correct interpretation of signaling and regular maintenance. A detector failure is often indicated not only by a prominent indicator light or an audible signal, but also by an unexpected shut-off of the solenoid valve, which requires an immediate response from a technician.

Interpretation of LED indicators and alarm states

The core of diagnostics is monitoring the LED, which on the model Gas Detector AVANSA 100M changes color and blinking pattern according to the current status. A steady green indication means normal operating mode, while a constant or blinking red light indicates the presence of gas or a sensor error. Prolonged red blinking is a warning of low gas concentration, which the user must address immediately to prevent the activation of the safety period.

Technicians in the field often observe situations where a blinking red LED does not correspond to a real gas leak, but indicates a calibration cycle after a longer period of inactivity. If the detector blinks red for more than 60 seconds after being connected to the power supply, it does not necessarily mean a fault, but rather the need for a start-up sequence. It is important to distinguish between these two states to avoid false alarms during normal operation.

Impact of external power supply and solenoid valves

The combination of the detector with solenoid valve G1" DN25 creates a complex safety circuit that can report errors even in the case of a problem with the valve's power supply. If the power line is interrupted or the valve is mechanically jammed, the detector will trigger an "Circuit error" alarm, which is indicated by rapid LED blinking and a quiet beeping sound.

Low voltage in batteries (if a backup battery is used) will cause yellow blinking and subsequent shutdown.
Broken wire between the detector and the valve will trigger a constant red signal with short pauses.
A jammed valve may cause the detector to repeatedly send a closing command, which appears as a communication error.

In practice, we have recorded cases where older installation wires with high resistance caused a voltage drop below the critical level, which triggered false alarms when the valve was suddenly opened. Checking the voltage drop on a cable longer than 20 meters is therefore essential when installing valve G3/4" DN 20.

Problems with the sensor and the need for calibration

Sensor modules in models AVANSA 100M and 200M have a lifespan of approximately 5 to 7 years, after which their degradation and loss of sensitivity occur. Since these detectors do not require manual calibration using gas, if they start reporting an error "Sensor" or "Calibration", it means that the electronics detect deviations in the sensor's characteristics, which can no longer be corrected. In such a case, the entire unit must be replaced.

A practical example is a situation where a detector installed in a kitchen with a gas stove reports an error after three years, even though it was not exposed to extreme temperatures. This is a typical sign of aging electrochemical sensor, which has lost its selectivity to methane. This condition requires immediate replacement, as the detector can no longer reliably respond to a real gas leak.

Temperature extremes and condensation

The mounting position of the detector has a direct impact on its functionality, especially if it is located near heat sources or in areas with high humidity. Temperatures above 45 °C or below -10 °C can cause temporary shutdown of the detector or incorrect gas concentration measurements. Condensation of water on the sensor can lead to a false alarm, as water affects the air conductivity around the sensor.

We recommend checking that the detector AVANSA 150MC or 100M is mounted outside the reach of direct heat streams from appliances. If condensation appears in the area, it is necessary to wait for it to dry out, after which the detector should automatically reset the alarm upon returning to normal conditions. Prolonged exposure to moisture, however, can damage the electronics and require service.

Differences in signaling between models 100M and 200M

Although the basic signaling logic is similar, model AVANSA 200M offers more advanced diagnostics and the possibility of connecting multiple external devices. Model 100M focuses on simple detection and valve closure, while 200M can also report "Insufficient concentration" or "Communication error" when connected to a central control panel.

Model 100M has one LED indication and one sound signal for all states.
Model 200M distinguishes between gas alarm, sensor failure, and power supply problems using different blinking patterns.
200M supports external relays, which can be a source of additional errors if improperly configured.

In practice, it often happens that a customer confuses model 100M with 200M and expects the same level of diagnostics. It is important to know that in model 100M, one error is enough to completely shut down the system, while 200M can continue operating with limited functions in the case of certain types of errors.

Switching logic of the solenoid valve and detection of circuit failure

This graph shows how the state of the output relay changes depending on the measured gas values and the presence of a power supply error, which is key for diagnosing false alarms.

Relationship between gas concentration and activation of the safety mechanism

The diagram illustrates the critical boundary at which the power supply to the solenoid valve is immediately interrupted, thus preventing further gas leakage into the area.

Frequently asked questions

How long does the startup phase last after turning on the device?

The startup phase usually lasts 60 seconds, during which the LED blinks red and the detector verifies the integrity of the sensor.

Can condensation cause a permanent error?

Condensation causes only a temporary error that resolves itself after the sensor dries, but prolonged humidity can permanently damage the electronics.

When is it necessary to replace the entire detector instead of servicing it?

Replacement is necessary when the sensor reaches the end of its life (5-7 years) or when the electronic board is damaged due to overloading.

This summary shows that most faults in AVANSA detectors are either caused by sensor wear, incorrect installation, or power supply issues, which can be resolved by a systematic approach. Correct interpretation of LED signals and regular checking of the solenoid valve's operation are key to maintaining the safety of your home or business.

Do you have a question about this topic?

Not sure or dealing with a specific situation in your home? Write to us – we are happy to help.