Growatt WIT 50-100K-US - Page 73

73
Table 9.2 Error codes
Error Code
Description
Suggestion
AFCI Fault
An arc fault has been
detected
1. After shutdown, check the connection of the
PV string.
2. Restart the inverter.
3. If the error message persists, please contact
Growatt support.
GFCI High
An excessively high leakage
current has been detected
1. Restart the inverter.
2. If the error message persists, please contact Growatt
support.
PV Voltage
High
DC input voltage exceeds
the upper threshold
1. Disconnect the DC switch immediately and
check the voltage.
2. If the DC input voltage is within the
permissible range and the error message persists,
please contact Growatt support.
PV Isolation
Low
PV panels have low
insulation resistance
1. Check if the PV strings are properly grounded.
2. If the error message persists, please contact
Growatt support.
PV Reversed
PV string reversely
connected
1. After shutdown, check if the PV string is
reversely connected to the inverter.
2. Restart the inverter.
3. If the error message persists, please contact
Growatt support.
AC V Outrange
Grid voltage is beyond
the permissible range
1. Check the grid voltage.
2. If the grid voltage is within the permissible
range and the error message persists, please
contact Growatt support.
No AC
No utility grid connected
or utility grid power
failure
1. After shutdown, check the AC wiring.
2. If the error message persists, please contact
Growatt support.
NE Abnormal
The voltage difference
between the N line and
the PE cable is abnormal
1. After shutdown, check if the ground cable is
reliably connected.
2. If the error message persists, please contact
Growatt support.
AC F Outrange
Grid frequency is beyond
the permissible range
1. Check the grid frequency and restart the
inverter.
2. If the error message persists, please contact
Growatt support.
Error 309
Grid ROCOF (Rated of
Change of Frequency)
abnormal
1. Check the grid frequency and restart the
inverter.
2. If the error message persists, please contact
Growatt support.