103
EN-US
Class 5–6 Service
Codes
Class 5–6 status codes generally do not impair grid power feed operation, but can lead to
limitations. They will be displayed until the status code is acknowledged by pressing a key
(the inverter, however, continues working normally in the background).
Code Description Behavior Remedy
502 An insulation fault was de-
tected between DC+/DC-
and the ground
1. Insulation fault in PV gener-
ator
1. Check cable and PV gener-
ator
509 No grid power feed opera-
tion over 24 hours
1. Modules covered by snow or
very dirty
1. Clean modules or remove
snow
2. For grid power feed opera-
tion of modules
2. Check other service codes
515 EEPROM communication
failed
1. Occurs once 1. Restart inverter
2. Filter calibration value incor-
rect
2. Replace AC PC board and
then, if necessary, DC PC
board
516 Communication error in
power module
1. Occurs once 1. Restart inverter
2. Power module faulty 2. Replace power module
517 Power module derating
caused by excessive tem-
perature
1. Ventilation opening blocked 1. Clean ventilation openings
2. Ambient temperature too
high
2. Change setup location
3. Disconnected fan cable 3. Connect fan cable
4. Fan faulty 4. Replace fans
5. Bad contact: power module
<--> heat sink
5. Check phase change paste
6. Filter PC board faulty 6. Replace filter PC board
7. Recerbo faulty 7. Recerbo faulty
8. Measurement error on pow-
er module
8. Replace power module
518 Internal DSP malfunction
519 Communication error in fil-
ter PC board
1. Occurs once 1. Restart inverter
2. Filter PC board faulty 2. Replace filter PC board
520 No infeed on DC1 within 24
hours
1. Modules covered by snow or
very dirty
1. Clean modules or remove
snow
2. For grid power feed opera-
tion of modules
2. Check other service codes
3. Input not used 3. Set inverter as mono-string
521 No infeed on DC2 within 24
hours
1. Modules covered by snow or
very dirty
1. Clean modules or remove
snow
2. For grid power feed opera-
tion of modules
2. Check other service codes
3. Input not used 3. Set inverter as mono-string
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