Protection Concept
The micro controller continuously and
simultaneously monitors and displays the
following parameters. Numbers 1 to 3
refer to the energy units 1 to 3:
Error No.
Description
001
DC overvoltage 1
002
DC overvoltage 2
003
DC overvoltage 3
004
Frequency fault 1
005
Frequency fault 2
Frequency fault 3
006
Overheating of heat sink 1
007
Overheating of heat sink 2
008
Overheating of heat sink 3
009
Grid undervoltage 1-phase 1
010
Grid undervoltage 1-phase 2
011
012
Grid undervoltage 1-phase 3
013
Grid overvoltage 1-phase 1
014
Grid overvoltage 1-phase 2
015
Grid overvoltage 1-phase 3
016
Grid undervoltage 3-phase
017
AFI fault 1
018
AFI fault 2
019
AFI fault 3
020
Insulation fault 1
The numbering 1 to 3 refers respectively
to the performance unit 1 to 3:
Error
Description
No.021
Insulation fault 2
022
Insulation fault 3
023
DC injection 1
024
DC injection 2
025
DC injection 3
026
Isolated operation
027
Grid overvoltage 3-phase
028
Surge fault 1
029
Surge fault 2
030
Surge fault 3
031
Grid voltage 10 minutes mean value
> 10 percent U
032
Grid voltage 10 minutes mean value
> 10 percent U
033
Grid voltage 10 minutes mean value
> 10 percent U
034
Control circuit board 1 fault
035
Control circuit board 2 fault
036
Control circuit board 3 fault
038
Back-up battery empty
98
1
nominal
2
nominal
3
nominal