SMA SI 3.0-11 - Manual (Page 51)

SMA Solar Technology AG 9 Troubleshooting
Operating Manual SI30M-44M-60H-80H-BE-en-30 51
9.4.3 Generator or Utility Grid Category (3xx)
No. Name Level Cause Corrective measures
W 309 RlyProtect 1 Excessive current has been
applied to the internal
transfer relay of the master.
• Reduce the total power of the loads, e.g.,
by staggering their use over time.
•
Connect the loads with very high power
directly to the generator whenever
possible or connect the utility grid. Ensure
that the generator is not overloaded.
•
In off-grid systems, ensure that the country
data sets of the SMA inverters are set to
stand-alone grid operation
(see the installation manuals of the SMA
inverters).
W 310 RlyProtectSlv1 1 Excessive current has been
applied to the internal
transfer relay of slave 1.
W 311 RlyProtectSlv2 1 Excessive current has been
applied to the internal
transfer relay of slave 2.
F 314 ExtVtgLoss 2 The voltage and/or
frequency of the generator
or the utility grid are outside
the configured range.
Corrective measures for a generator:
•
Adjust the thresholds for generator
frequency and/or voltage on the
Sunny Island (see the Sunny Island
inverter installation manual). Observe
and analyze the measured values
134.02 ExtVtg and 134.04 ExtFrq
during operation.
•
Adjust the generator voltage and/or
generator frequency.
Corrective measures in battery backup
systems:
• Contact the SMA Service Line, if required.