Senergy 16KTL-DL3, User Manual

Page: 42 / 50

Alarm Name Measures Recommended Causes
8
.
2 The Inverter Troubleshooting
When inverter enters in shutdown mode abnormally
,
the alarm light is illuminated
.
Table 8
.
2
describes the troubleshooting measures for common fault alarms in the inverter
.
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 SE Touch 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 SE Touch
.
39