Sungrow SG3125HV-20, System Manual

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107
F Fa au ulltt
n na am me e
E Exxp plla an na attiio on n
F Fa au ulltt
sse evve erriittyy
M Me ea assu urre ess
Ground
Fuse flt
Grounding fuse
is abnormal.
Minor
Wait the inverter capacitor to discharge
completely, and then remove the
negative grounding fuse. Check
whether the fuse has blown.
If so, check whether the neutral point of
the transformer is unconnected, and
whether the neutral point of the PT/CT
on the LV side of the transformer is
grounded.
Meter-
com-flt
Communication
of the energy
meter is
abnormal.
Minor
1. Check whether communication
cables connected to the energy meter
and metering board are damaged.
2. Check whether communication
terminals of the energy meter and
metering board are securely fastened.
DC fuse-
abnorm-
al
DC fuses of the
inverter are
abnormal.
Minor
Check whether the DC fuse have blown.
If so, contact Sungrow and replace the
fuses.
Branch
Fuse flt
Branch fuses of
the inverter are
abnormal.
Minor
Refer to the measures for "DC fuse-
abnomal".
RISO flt
The insulation
resistance is
excessively low.
Minor
1. Check whether insulation layers of
positive and negative DC cables to
ground are damaged.
2. Check the insulation resistance to
ground of AC three phases.
3. Check the connection of the neutral
point on LV side of the transformer to
ensure the neutral point is not grounded.
Freq
shift
Watt adj
The active
power of the
inverter is
adjusted
according to the
change of grid
frequency.
Warning
Check, via the LCD, whether the
overfrequency derating function is
enabled.
If the function is enabled, it indicates
overfrequency occurs during the
operation.
System Manual 12 Troubleshooting