3. Bus soft-start failed circuit on the main board is damaged.
Suggestion:
1. Check if battery mode setting on SPF is same with the battery type you connecting.if no,
change it and restart system.
2. Turn off PV, batteries and grid to power off the inverter completely till there is nothing
displayed on LCD and restart, observe whether the error code is cleaned.
3. If the error code is not cleared, replace main board to fix it.
4. 10 Error 51
Fault description: Over current or surge.
Analysis：
1. Output load is higher than 5000W.
2. It may be the problem inductive load on the machine, and at startup, it will cause
excessive shock current, which will protect the machine and pay attention to
the impact of such inductive load.
3. Could be a short circuit on the load and needs to be checked.
4. Output current sample circuit is damaged.
Suggestion:
1. Check if there are some inductive load on the output, if this fault appears at the
startup,it caused by shock current of load, you need reduce the load and resrtart
inverter.
2. Check the output load, if more than 5kw, switch off some load and restart inverter to
remove the fault message.
3. If the error code is not cleared after restarted, replace the main board to fix it.
4. 11 Error 52
Fault description: Bus voltage is too low
Analysis：
1. there may be too much load start at the same time，the instantaneous load is too large
to pull down the bus voltage
Suggestion:
1. please start special machine first if there is some linear load connected with inverter
AC output.it takes almost 3 times rate power while starting up ， such as water
motor.SPF5000TL HVM is only possible to supply a 1.5kw water motor.
2. Restart inverter，take turn to startup loads.
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