99
EN
Code Description Behaviour Remedy
502 An insulation fault between
DC+ / DC- and ground was
detected
1. Insulation fault on the PV
generator
1. Check cables and PV gener-
ator
509 No energy fed into the grid
for 24 hours
1. Modules are covered in
snow or are very dirty
1. Clean modules or remove
snow
2. For feeding energy into the
grid from the modules
2. Check other service codes
515 EEPROM communication
failed
1. Occurs once 1. Restart the inverter
2. Filter calibration value incor-
rect
2. Replace AC PC board; re-
place DC PC board if neces-
sary
516 Communication fault in
power stage set
1. Occurs once 1. Restart the inverter
2. Faulty power stage set 2. Replacing a power stage set
517 Temperature too high, lead-
ing to power stage set der-
ating
1. Ventilation opening blocked 1. Clean ventilation openings
2. Ambient temperature too
high
2. Change installation site
3. Fan cable not connected 3. Connect fan cable
4. Faulty fan 4. Replace the fan
5. Poor contact: power stage
set <--> heat sink
5. Check phase change paste
6. Faulty filter PC board 6. Replace filter PC board
7. Faulty Recerbo 7. Faulty Recerbo
8. Measurement fault on power
stage set
8. Replacing a power stage set
518 Internal DSP malfunction
519 Communication fault in filter
PC board
1. Occurs once 1. Restart the inverter
2. Faulty filter PC board 2. Replace filter PC board
520 No feed-in at DC1 for 24
hours
1. Modules are covered in
snow or are very dirty
1. Clean modules or remove
snow
2. For feeding energy into the
grid from the modules
2. Check other service codes
3. Input not in use 3. Set as monostring inverter
521 No feed-in at DC2 for 24
hours
1. Modules are covered in
snow or are very dirty
1. Clean modules or remove
snow
2. For feeding energy into the
grid from the modules
2. Check other service codes
3. Input not in use 3. Set as monostring inverter
522 DC LOW Ch1 1. DC main switch open 1. Close DC main switch
2. PV generator not connected 2. Connect PV generator
3. DC voltage too low for feed-
in
3. Wait for increased insolation
or check modules
4. Reverse voltage of PV gen-
erator
4. Change the polarity of the
PV generator
5. DC operating mode: fixed
voltage and incorrect voltage
5. Check MPP settings and
voltages
6. Measurement fault on power
stage set
6. Replace DC PC board; re-
place AC PC board if neces-
sary
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