Fronius Selectiva 2040 2kW Operating Instructions Manual page 41

Status codes in the event of a fault in the secondary circuit
Number Cause
(570) Secondary relay cannot be switched
(571) ADC/SPI error
Status codes in the event of a fault in the controller
Number Cause
(540) CFM missing/faulty
(541) No secondary communication
(542) Secondary initialisation failed
(543) Program/memory fault in characteristic control
(544) Program/memory fault in characteristic control
(545) Primary initialisation failed
(546) Update failed
(547) Load/save settings failed
(548) Load/save characteristic settings failed
(549) Charging process could not be continued after a power outage, due to a
fault in the backup battery
(550) Time not set
(551) Hardware change detected
(552) CFM invalid
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