44
Troubleshooting
45
error Diagnostics and Solutions
ISO_Fail
PV insulation impedance below safety value
1. Check PV electrical connection;
2. Check the grounding of inverter;
3. Contact the installer;
Incorrect meter direction
1. Confirm whether the current direction of the meter is correct;
2. Contact the installer
The inverter receives the shutdown command and is in the shutdown state
1. Send the startup command through app or web to re run the inverter;
2. Contact the installer
Grid rated frequency setting error
1. Check whether the state / power grid directive is set correctly;
2. Contact the installer
Inverter grounding fault
1. Check whether the Neutral line of the power grid is correctly connected;
2. Check whether the inverter ground wire is correctly connected;
3. Try to re run the inverter;
4. Contact the installer;
Reversed PV connection on MPPT1 (PV01-PV12 respectively represent the PV
input channel 1-12)
1. Check whether the electrical connection of PV module is correct;
2. Contact the installer
PV input voltage is higher than the allowable value (PV1-PV12 respectively
represents 1-12 PV overvoltage)
1. Check the PV voltage and confirm that it is within the allowable range;
2. Reduce the number of PV modules in series and reduce PV voltage;
3. Contact the installer
MPPT software overcurrent
1. Check whether the PV input is short circuited;
2. Try to restart the inverter;
3. Contact the installer
MPPT hardware overcurrent
1. Check whether the PV input is short circuited;
2. Try to restart the inverter;
3. Contact the installer
Power failure of power grid / disconnection of AC line or AC switch.
1. Check whether the grid voltage is normal;
2. Check the power grid electrical connection AC switch;
3. Try to restart the inverter
The grid voltage exceeds the allowable value
1. Check whether the grid voltage is within the allowable range;
2. Try to re run the inverter;
The grid voltage is lower than the allowable value
1. Check whether the grid voltage is within the allowable range;
2. Try to re run the inverter;
The average grid voltage in 10 minutes exceeds the allowable value
1. Check whether the grid voltage is within the allowable range;
2. Try to re run the inverter;
Meter_Oppsite
Remote_Off
Freq_Cfg_Err
Gnd_Conn_Err
PV01_Reverse
PV_VolHigh
BST_SW_OCP
BST_HW_OCP
Grid_Loss
GridVol_OP1
GridVol_UP1
GridVol_OP_10M
GridVol_OP_INST
Instantaneous high voltage of power grid
1. Check whether the grid voltage is within the allowable range;
2. Try to re run the inverter;
Grid frequency exceeds allowable value
1. Check whether the power grid frequency is within the allowable range;
2. Try to re run the inverter;
The grid frequency is lower than the allowable value
1. Check whether the power grid frequency is within the allowable range;
2. Try to re run the inverter;
Loss of grid phase voltage
1. Check the grid voltage;
2. Check the power grid electrical connection AC switch;
3. Try to re run the inverter
Grid voltage imbalance
1. Check whether the grid voltage is within the allowable range;
2. Try to re run the inverter;
Grid fault
1. Check whether the grid voltage is within the allowable range;
2. Try to re run the inverter;
Bus hardware overvoltage
1. Check the PV voltage and confirm that it is within the allowable range;
2. Try to restart the inverter;
3. Contact the installer
Bus software overvoltage
1. Try to restart the inverter;
2. Contact the installer
Bus software overvoltage
1. Try to restart the inverter;
2. Contact the installer
Bus software overvoltage
1. Check the PV voltage and confirm that it is within the allowable range;
2. Try to restart the inverter;
3. Contact the installer
Bus software undervoltage
1. Check the PV voltage and confirm that it is within the allowable range;
2. Try to restart the inverter;
3. Contact the installer
Bus imbalance
1. Try to restart the inverter;
2. Contact the installer
The PV voltage is higher than the Bus voltage
1. Try to restart the inverter;
2. Contact the installer
GridFreq_OP1
GridFreq_UP1
GridPhase_Loss
Grid_Unbalance
Grid_FRT
DCBus_HW_OVP
PBus_FSW_OVP
NBus_FSW_OVP
DCBus_SW_OVP
DCBus_SW_UVP
DCBus_Unbalance
PV_Above_Bus
error Diagnostics and Solutions
Troubleshooting
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