2. If the actual value is higher than 60V, replace the battery.
3. Check if spec and quantity of batteries meet requirements.sometimes customer
connect 24V battery with 48V inverter model，please make sure the voltage is suitable.
3.4 warning 04
Fault description:Low battery.
Analysis：
1. It may be that inverter communication protocol is different from lithium icon battery
communication protocol，only some models of Pylon、Dyness brand lithium icon battery
can build communication with our inverter.
2. it may be that battery discharge too much，battery voltage is really low.
Suggestions:
4. if use lithium icon battery that can build communication with inverter，but still warn 04
fault，normally this fault comes with 20 fault，please arrange to upgrade inverter software
using ISP tool program software.
inverter new firmware software version：F2809_GW500.07_20191227_B.
inverter new BMS software version：F030_sk022_05_20191220.
please don’t forget to reset factory setting after upgrading every software.
2.If battery voltage is really low，please contact battery supplier to help charge battery to
normal state，don’t let battery discharge too much in future.
3.5 warning 07
Fault description:Overload.
Analysis：
1. Output load is higher than 5500W.
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. The inverter is overload 110% and time is up.
Suggestions:
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. Reduce the connected load by switching off some equipment.
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