CONVOTHERM MAXX PRO > Software error messages > E99...
E99.0.x.x - Communication error - connection lost
E99.1.x.x - SD-card error
E99.2.x.x to E99.7.x.x - Communication error - connection lost
E99.7.1.39 - Invalid date in the system
E99.9.x.x - Communication error - connection lost
E99.10.x.x - Error: Discrepancy between UI and SIB software