The Danfoss drive monitors the "heartbeat" of the communication network. The master controller must send status updates or telegrams to the drive at regular intervals. The drive has an internal timer monitoring this activity. If the time between valid telegrams exceeds the setting in the drive will trip on Error 1027.
If the EEPROM data on either card is corrupted or the cards are physically damaged, they will fail to initialize, resulting in this error. danfoss error 1027
This can also trigger if an option card with old or unsupported software is installed, or if t Primary Causes of Danfoss Error 1027 The Danfoss drive monitors the "heartbeat" of the
that requires the drive to be replaced or repaired by a specialist they will fail to initialize