SMA SUNNY ISLAND 3.0M Operating Manual page 54

10 Troubleshooting
No. Name
F 133 InvFrqLo
W 134 InvFrqLoSlv1
W 135 InvFrqLoSlv2
W 137 Derate
W 138 DerateSlv1
W 139 DerateSlv2
F 141 InvVtgLo
W 142 InvVtgLoSlv1
W 143 InvVtgLoSlv2
54 SI30M-44M-60H-80H-BE-en-33
Level Cause
3 Inverter underfrequency Line
conductor L1: An underfre-
quency has occurred at connec-
tion AC1 of the master.
1 Inverter underfrequency Line
conductor L2: An underfre-
quency has occurred at connec-
tion AC1 of slave 1.
1
Inverter underfrequency Line
conductor L3: An underfre-
quency has occurred at connec-
tion AC1 of slave 2.
1 Derating due to tempera-
ture L1: The master has re-
duced the battery charging cur-
rent due to overtemperature in
the Sunny Island.
1
Derating due to tempera-
ture L2: slave 1 has reduced
the battery charging current due
to overtemperature in the Sun-
ny Island.
1 Derating due to tempera-
ture L3: slave 2 has reduced
the battery charging current due
to overtemperature in the Sun-
ny Island.
2 Inverter undervoltage Line
conductor L1: The voltage at
connection AC1 of the master is
too low due to AC sources in
the system.
1 Inverter undervoltage Line
conductor L2: The voltage at
connection AC1 of slave 1 is
too low due to AC sources in
the system.
1
Inverter undervoltage Line
conductor L3: The voltage at
connection AC1 of slave 2 is
too low due to AC sources in
the system.
SMA Solar Technology AG
Corrective measures
• Ensure that the Sunny Island is
functional. For this, disconnect all
AC sources and loads from the
Sunny Island and restart the
Sunny Island.
• Find the cause of the
underfrequency through
measurement and step-by-step
connection of the AC sources and
loads.
• Reduce the total power of the
loads, e.g. by staggering their use
over time.
• Clean the fans (see Section 11.7,
page 95).
• If the Sunny Island frequently
reduces its power, increase power
by replacing the Sunny Island with
a higher-powered version or by
installing additional Sunny Island
inverters.
• Ensure that the Sunny Island is
functional. For this, disconnect all
AC sources and loads from the
Sunny Island and restart the
Sunny Island.
• Find the cause of the undervoltage
through measurement and step-by-
step connection of the AC sources
and loads.
Operating Manual