Goodwe SDT Series User Manual page 62

09 Maintenance
No. Fault
LVRT
9
Undervoltage
10 HVRT Overvoltage
Abnormal GFCI
11
30mA
Abnormal GFCI
12
60mA
Abnormal GFCI
13
150mA
14 Abnormal GFCI
Large DC of AC
15
current L1
Large DC of AC
16
current L2
Low Insulation
17
Res.
Cause
Abnormal grid, and
the abnormal duratin
exceeds the specified
value of local high
voltage safety regulation.
Abnormal grid, and
the abnormal duratin
exceeds the specified
value of local high
voltage safety regulation.
The insulation impedance
pf PV string to ground
decreases during the
operation of the inverter.
The DC component
of the inverter output
current exceeds the
local safety regulation's
or the inverter's default
allowable range.
1. The short circuit
protection of PV to the
ground.
2. The installation
environment of PV
strings is relatively
humid for a long time
and the insulation of
PE cable is poor.
User Manual V1.3-2024-01-25
Solutions
1. If occurs occasionaly, it may
be caused a short term grid
abnormity. The inverter will recover
automatically after the grid is
normal.
2. If it occurs frequently, please check
whether the grid voltage is within
the allowed range.
• If no, please contact local power
operator.
• If yes, please contact the local
service center.
1. If occurs occasionaly, it may be caused
a occasional abnormal ouside wiring.
The inverter will recover automatically
after clear the abnormity.
2. If it occurs frequently or cannot
restore for a long time, please check
if the insulation impedance of the PV
string to the ground is too low.
1. If caused by an external fault (such
as the grid abnormality, frequency
abnormality, etc.), the inverter
will resume normal operation
automatically after the fault is cleared.
2. If the alarm occurs frequently or
affects the normal power generation,
please contact your dealer or after-
sales service center.
1. Check the impedance of the PV string
to the ground. If there is a short circuit
phenomenom, please check the short
circuit point and rectify it.
2. Check if the PE cable of the inverter is
connected correctly.
3. If it is confirmed that the impedance
is indeed lower than the default value
in cloudy and rainy days, please reset
the "insulation impedance protection
value".
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