SMA SUNNY BOY 2000HF - Page 70

Messages SMA Solar Technology AG
70 SB20_25_30HF-IEN102911 Installation Guide
6< Grid fault >
The internal inverter monitoring has
detected an impermissibly high proportion
of direct current in the grid current.
• Check the grid connection for direct
current.
• If this is a recurrent phenomenon,
check with the utility provider
whether it is possible to raise the
limiting value of monitoring.
7 < Frq. not permitted >
The grid frequency has left the allowable
range. For safety reasons, the inverter
disconnects itself from the grid.
• If possible, check the grid frequency
and observe how often major
deviations occur.
If repeated frequency variations occur and
as a result this error occurs, ask the utility
provider if it would agree to modify the
operating parameter.
Discuss the proposed parameters with the
SMAServiceline.
8 < Waiting for grid voltage >
< Grid failure >
< Check fuse >
•Check fuse.
• Check AC installation.
• Check whether there is a general
black-out.
33 < Unstable operation >
The supply at the DC input of the inverter is
not sufficient for stable operation. The
reason for this could be snow-covered
PVmodules.
• Wait for higher irradiation.
• If this event recurs at medium
irradiation, check the PV system
design and correct the connection of
the PV generator.
34 < DC overvoltage >
< Disconnect generator >
The DC input voltage connected to the
inverter is too high.
• Immediately disconnect the
inverter from the PV generator,
as described in section
8.2”Disconnect the Inverter
from Voltage Sources”
(page60)! Otherwise, the
inverter may be destroyed.
• Check the DC voltage of the strings
for adherence to the maximum input
voltage of the inverter, before you
re‑connect the inverter to the
PVgenerator.
Event no. Display message and cause Corrective measures