connections
Check that PGND cables are securely
phenomenon,
connected;
replace the cable or
Check that cables are intact and there are
re-connect it.
not wire aging;
9.2 The Inverter Troubleshooting
When inverter enters in shutdown mode, the alarm light is illuminated. Table 9.2
describes the troubleshooting measures for common fault alarms in the inverter.
Table 9.2 Common troubleshooting measures
Alarm
Causes
Measures Recommended
Name
Grid
The grid voltage exceeds
1. If the alarm occurs accidentally, possibly the
Over
the allowable range.
power grid is abnormal accidentally. No extra
Voltage
action is needed.
2. If the alarm occurs repeatedly, contact the local
Grid
Under
power station. After receiving approval of the local
Voltage
power bureau, revise the electrical protection
parameters setting of inverter through SE Touch,
APP.
Over
Frequency
3. If the alarm persists for a long time, check
whether the AC circuit breaker/ AC terminals is
Under
Frequency
disconnected or not, or if the grid has a power
outage.
PV Over
Input voltage of
PV Check the number of PV modules and adjust it.
Voltage
modules exceeds
the
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