Modern ES99 units often require a technical code (often "A9" or "00") to access deep settings. Changing these without knowledge can cause malfunctions. Common Adjustments
Raises the desired room temperature or moves up in menu lists. micronova es99 user manual
When the ES99 detects a problem, it stops the stove and displays an alarm code. Power was lost. Restart once the unit is cool. AL 2 Flue Gas Probe The temperature sensor in the exhaust is faulty. AL 4 Extractor Fail The exhaust fan is blocked or the encoder is broken. AL 5 Ignition Fail Modern ES99 units often require a technical code