LIVOLTEK GT1-3K-S, User Manual

Page: 39 / 46

Alarm Name Measures Recommended Causes
8 2 Inverter warning and exception handling
.
When the inverter has an exception, its basic common warning and exception handling methods
are shown in the table 8.2.
Grid
Over Voltage
Grid
Under Voltage
Over
Frequency
Under
Frequency
PV Over
Voltage
The grid voltage
exceeds its
allowable range
.
PV modules input
voltage exceeds
the inverter ’ s
allowable range
.
1 If the alarm occurs accidentally possibly the
. ,
power grid is abnormal accidentally No extra
.
action is needed
.
. ,
2 If the alarm occurs repeatedly contact the local
power station After receiving approval of the local
.
power bureau revise the electrical protection
,
parameters setting on the inverter through mobile APP
.
. ,
3 If the alarm persists for a long time check whether
the AC circuit breaker/AC terminals is disconnected
or not or if the grid has a power outage
, .
Check the number of PV modules and adjust it if need
.
PV Under
Voltage
PV modules input
voltage is under
the inverter ’ s
defaulted
protection value
.
1 When sunlight intensity weakens PV modules
. ,
voltage decreases No action is needed
. .
.
2 If such phenomena occur when sunlight intensity
does not weaken check if there is short circuit open
, ,
circuit etc in the PV strings
. .
Insulation
Resistance
Abnormal
A short circuit
exists between
PV strings and
protection ground
.
PV strings are
installed in a
long-term moist
environment
.
1 Check the insulation resistance against the ground
.
for the PV strings If a short circuit has occurred
. ,
.
rectify the fault
2 If the insulation resistance against the ground is
.
less than the default value in a rainy environment set
,
Insulation resistance protection on APP
.
36