4. 12 Error 53
Fault description: Inverter soft start failed
Analysis：
1. MPPT voltage is always below expected voltage in 20s when inverter start.
2. There is something wrong with inverter switch tube.
3. There is something wrong with DCDC in DC side.
Suggestion:
1. please try to restart inverter，check whether fault will disappear or not.
2. Please check your pv panels configuration ， for SPF5000TL HVM model ： suggest
connect with 12 pcs（330W），3 in series，4 parallel.
3. Change the main board.
4. 13 Error 55
Fault description: Over DC voltage in AC output.
Analysis：
1. Output voltage is unbalanced.
2. This fault is caused by the internal failure of the machine and may be caused by the
regulation control.
Suggestion:
1. 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.
2. If the error code is not cleared, replace main board to fix it.
3. If replace the main board still shows error code on the LCD of the inverter,please
contact Growatt service center for help.
4.14 Error 56
Fault description:Battery connection is open.
Analysis：
1. The communication line is not plugged in or poor connection.
2. Lithium battery is not approved by Growatt.
3. The lithium battery is switched off.
4. The battery is broken.
5. Fuse is burnt.
Suggestion:
1. Check the lithium Battery is on or off.
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