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SOFAR 3.3K~12KTL-X
User manual
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Shenzhen SOFARSOLAR Co ., Ltd.
- 62 -
and AC wiring is correct, while the alarm occurs
repeatedly, contact SOFAR technical support to change the
grid over-voltage, under-voltage, over-frequency,
under-frequency protection points after obtaining approval
from the local electrical grid operator.
ID04
GridUFP
The power grid
frequency is
too low
ID05
PVUVP
The input
voltage is too
low
Check whether too few PV modules are series connected in
a PV string, thus the voltage(Vmp) of the PV string is
lower than the minimum operating voltage of SOFAR
inverter. If yes, adjust the number of series connected PV
modules to increase the voltage of the PV string to fit the
input voltage range of SOFAR inverter. SOFAR inverter
automatically returns to normal operating status after
correct adjustments.
ID06
Vlvrtlow
Low voltage
across
Check the AC wiring connection to the electric grid, if it’s
correct, please contact SOFAR technical support.
ID07-ID08 Reserved Reserved
Reserved
ID09
PvOVP
The input
voltage is too
high
Check whether too many PV modules are series connected
in a PV string, thus the voltage(Voc) of the PV string is
higher than the maximum input voltage of SOFAR
inverter. If yes, adjust the number of series connected PV
modules to decrease the voltage of the PV string to fit the
input voltage range of SOFAR inverter. SOFAR inverter
automatically returns to normal operating status after
correct adjustments.
ID10
IpvUnbala
nce
Input current is
not balanced Check the input mode(parallel mode/ independent mode)
setting of SOFAR inverter according to Section
4.5 of this user manual.
ID11
PvConfigS
etWrong
Incorrect input
mode
ID12
GFCIFault GFCI Fault
If the fault occurs occasionally, the possible cause is that
the external circuits are abnormal occasionally. SOFAR
inverter automatically returns to normal operating status
after the fault is rectified.
If the fault occurs frequently and lasts a long time, check
whether the insulation resistance between the PV array and
earth(ground) is too low, then check the insulation
conditions of PV cables.
ID13
PhaseSuen
ceFault
Phase
sequence
errors
If the alarm occurs occasionally, the possible cause is that
the electric grid is abnormal occasionally. SOFAR inverter
automatically returns to normal operating status when the
electric grid's back to normal.
If the alarm occurs frequently, check whether the grid
voltage/frequency is within the acceptable range. If no,
contact SOFAR technical support. If yes, check the AC