RedEarth BlackMax - BlackMax Fault Codes

BlackMax – Installation and Operation Manual
Page 21 of 36
Issue date: 24/11/2023. Version 13.0
BlackMax Fault Codes
Error code
Description
Solutions
F08
GFDI _Relay_Failure
1. When inverter is in Split phase(120/240Vac) or three-phase
system (120/208Vac) system, the backup load port N line
needs to connect ground;
2. If the fault still exists, please contact us for help.
F13
Working mode change
1. When the grid type and frequency changed it will report F13;
2. When the battery mode was changed to “No battery” mode,
it will report F13;
3. For some old FW version, it will report F13 when the system
work mode changed;
4. Generally, it will disappear automatically when shows F13;
5. If still same, and turn off the DC switch and AC switch and
wait for one minute and then turn on the DC/AC switch;
6. Seek help from us, if cannot go back to normal state.
F18
AC over current fault of hardware
AC side over current fault
1. Please check whether the backup load power and common
load power are within the range;
2. Restart and check whether it is in normal;
3. Seek help from us, if cannot go back to normal state.
F20
DC over current fault of the hardware
DC side over current fault
1. Check PV module connect and battery connect;
2. When in the off-grid mode, the inverter startup with big power
load, it may report F20. Please reduce the load power
connected;
3. Tu r n o f f t h e D C s w i t c h a n d A C s w i t c h a n d t h e n w a i t o n e
minute,then turn on the DC/AC switch again;
4. Seek help from us, if cannot go back to normal state.
F22
Tz_EmergStop_Fault
Please contact your installer for help.
F23
AC leakage current is transient over
current
Leakage current fault
1. Check PV side cable ground connection.
2. Restart the system 2~3 times.
3. If the fault still exists, please contact us for help.
F24
DC insulation impedance failure
PV isolation resistance is too low
1. Check the connection of PV panels and inverter is firmly and
correctly;
2. Check whether the PE cable of inverter is connected to
ground;
3. Seek help from us, if cannot go back to normal state.
F26
The DC busbar is unbalanced
1. Please wait for a while and check whether it is normal;
2. When the hybrid in split phase mode, and the load of L1 and
load of L2 is big different, it will report the F26.
3. Restart the system 2~3 times.
4. Seek help from us, if cannot go back to normal state.
F29
Parallel CANBus fault
1. When in parallel mode, check the parallel communication
cable connection and hybrid inverter communication address
setting;
2. During the parallel system startup period, inverters will report
F29. when all inverters are in ON status, it will disappear
automatically;
3. If the fault still exists, please contact us for help.
F34
ACOvercurrent fault
1. Check the backup load connected, make sure it is in allowed
power range;
2. If the fault still exists, please contact us for help.
F35
No AC grid
No Utility
1. Please confirm grid is lost or not;
2. Check the grid connection is good or not;
3. Check the switch between inverter and grid is on or not;
4. Seek help from us, if cannot go back to normal state.
F41
Parallel system stop
1. Check the hybrid inverter working status. If there's 1 pcs
hybrid inverter is in OFF status, the other hybrid inverters
may report F41 fault in parallel system.
2. If the fault still exists, please contact us for help.
F42
AC line low voltage
Grid voltage fault
1. Check the AC voltage is in the range of standard voltage in
specification;
2. Check whether grid AC cables are firmly and correctly
connected;
3. Seek help from us, if cannot go back to normal state.