THREE PHASE HI 25/50kW | Installer Manual67
Error Code Description Solutions
F15 AC_OuverCurr_SW_Failure
AC side over current fault
1. Please check whether the backup load power and com-
mon load power are within the range;
2. Restart and check whether it is normal;
3. Seek help from Sunsynk.
F16 GFCI_Failure
Leakage current fault
1. Check the PV side cable ground connection;
2. Restart the system 2-3 times;
3. If the fault still existing, please contact Sunsynk.
F18 Tz_Ac_Overcurr_Fault
AC Slide over current fault.
1.Check if the backup load power is within the range of the
inverter.
2.Restart, and check if it is normal.
F20 Tz_Dc_Overcurr_Fault
DC side over current fault
1. Check PV module connect and battery connect;
2. When in the o-grid mode, the inverter startup with a big
power load, and it may report F20. Please reduce the load
power connected.;
3. Turn o the DC and AC switches, wait one minute, and
then turn on the DC/AC switch again.
4. Seek help from us if you can not return to a normal state.
F21 Tz_HV_Overcurr_fault
BUS over current.
1. Check the PV input current and battery current settings;
2. Restart the system 2-3 times;
3. If the fault still existing, please contact Sunsynk.
F22 Tz_EmergStop_Fault
Remotely shutdown
1. It tells the inverter is remotely controlled.
F23 Tz_GFCI_OC_Fault
Leakage current fault
1.Check the PV module and inverter cables.
2.You may have a faulty PV panel (earth short)
3.Restart inverter
F24 DC_Insulation_Fault
PV isolation resistance is too low
1.Check if the connection of PV panels and inverter are rmly
connected.
2.Check if the earth bond cable on inverters is connected to
the ground.
F26 BusUnbalance_Fault
The bus bar is unbalanced
1.Please wait 5 minutes to see if it returns to normal.
2. Fully reset the inverter.
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