No. Grid
LED
LED
Display
Status description
Action
Pers
.
163
Error: Grid relay N
-
-
-
164
Error: Filter relay L1
-
-
-
165
Error: Filter relay L2
-
-
-
166
Error: Filter relay L3
-
-
-
167
Error: Filter relay N
-
-
-
180
Pre-synchronisation not pos-
sible
Adequate voltage pre-synchronisation with
the AC grid not possible. Conditions for dis-
play: Insulation resistance PV to PE too low
(<150 kOhm). The insulation error is not in the
module string but close to the inverter connec-
tions instead (PV+ or PV-) - DC link stability
(measure to PE) may exhibit a difference of no
more than +-2V during pre-synchronisation. -
the internal voltage could not be aligned suffi-
ciently with the AC grid voltage.
Have the insulation
resistance and PE
connection
checked.
-
181
Insulation error, centre
The insulation error is located close to the
centre of a PV string. The area -15% of
the half of the modules based on the total
number of modules. When the insulation res-
istance is distributed equally across the entire
string, this message is also generated when
the calculated insulation resistance falls below
the set value. Insulation error close to the
centre of the PV string (area co-15% of
the half of the string)
Insulation errors
must be rectified in
order to operate
the system safely
and reliably.
B
182
Insulation error, minus
The insulation error is located between the
centre of a string and the minus terminal on
the inverter. If the insulation error is located
very close to the minus inverter terminal, then
the error occurs even if the insulation error
<150 kOhm and is above the set value. Insula-
tion error on the minus terminal side of the PV
string.
See action in the
event of an error
181
B
183
Insulation error, plus
The insulation error is located between the
centre of a string and the plus terminal on the
inverter. If the insulation error is located very
close to the plus inverter terminal, then the er-
ror occurs even if the insulation error <150
kOhm and is above the set value.
See action in the
event of an error
181
B
184
Protective shutdown over-
current L1 int.
-
-
-
Manual
Maintenance and troubleshooting | 11
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