Fronius Acctiva Professional 35A - Manual (Page 43)

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No. 50: Device output fuse defective
Remedy:
-
Contact After-Sales Service
No. 51: Secondary temperature out of range
Remedy:
-
Contact After-Sales Service
No. 52: Current regulator defective
Remedy:
-
Contact After-Sales Service
No. 53: External temperature sensor defective
Remedy:
-
Replace external temperature sensor
Contact After-Sales Service in the event of the following charger faults (no. 60 onwards):
No. 60: Device fault - invalid characteristic number
No. 61: Device fault - invalid characteristic block
No. 62: Device fault - incorrect calibration values checksum
No. 63: Device fault - incorrect device type