Growatt WIT 50-100K-US - Page 71

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Warning 300
No utility grid connected or utility
grid power failure
1. Check if the grid is down.
2. If the error message persists, contact Growatt support.
Warning 301
Grid voltage is beyond the
permissible range
1. Check if the grid voltage is within the specified range.
2. If the error message persists, contact Growatt support.
Warning 302
Grid frequency is beyond the
permissible range
1. Check if the grid frequency is within the specified
range.
2. If the error message persists, contact Growatt support.
Warning 303
Overload
1. Please reduce the load connected to the EPS output
terminal.
2. If the error message persists, contact Growatt support.
Warning 308
Meter disconnected
1. Check if the meter is properly connected.
2. If the error message persists, contact Growatt support.
Warning 309
Meter is reversely connected
1. Check if the L line and the N line of the meter are
reversely connected.
2. If the error message persists, contact Growatt support.
Warning 310
The voltage difference between
the N line and the PE cable is
abnormal
1. Check if the PE cable is reliably connected after
shutdown.
2. If the error message persists, contact Growatt support.
Warning 311
Phase sequence error
No operation is required. The PCS will automatically
adjust the phase sequence.
Warning 400
Fan failure
1. Check if the fan is properly connected after shutdown.
2. If the error message persists, contact Growatt support.
Warning 401
Meter abnormal
1. Check if the meter is turned on.
2. If the meter is correctly connected to the inverter.
Warning 402
Communication between the
optimizer and the inverter is
abnormal
1. Check if the optimizer is turned on.
2. If the optimizer is correctly connected to the inverter.
Warning 407
Over-temperature
1. Restart the inverter.
2. If the error message persists, contact Growatt support.
Warning 408
NTC temperature sensor is broken
1. Restart the inverter.
2. If the error message persists, contact Growatt support.
Warning 411
Sync signal abnormal
1. Check if the sync cable is abnormal.
2. If the error message persists, contact Growatt support.
Warning 412
Startup requirements of grid
connection are not met
1. Check if the grid voltage is within the specified range
and check if the grid-connection startup voltage
configuration is correct.
2. Check if the PV voltage is within the specified range.
3. Restart the inverter. If the error message persists,
contact Growatt support.
Warning 500
The inverter failed to
communicate with the battery
1. Check if the battery is turned on.
2. Check if the battery is correctly and securely connected
to the inverter.