Growatt SPF-3500ES, Руководство по устранению неисправностей

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b. Every IGBT has 3 pins ( G, C, E ). Put black tong of multimeter on C pin and Put Red tong of
multimeter on E pin.
0.38-0.7V on multimeter is normal. If multimeter display zero, it means the IGBT has short circuit.
d. Replace broken IGBT
12 60 fault
Negative power fault means energy flows from load into load into inverter.
Testing method:
a. Try to disconnect all load from inverter, then observe if 60fault will disappear.
b. Check whether the output voltage setting in program 8 of all the Inverters in parallel are the same.
c. Check whether the current sharing cables are connected well in the same parallel phases.
Fig.6 Current sharing cables
d. Check whether all the neutral wires of each unit in a parallel system are connected together.
e. If still abnormal, try to upgrade the inverter.
f. If upgrading can
’t solve the issue, try to put control board or mainboard from normal inverter into the
inverter.
Solution:
a. Check 8th option on LCD for all inverters
b. Check current sharing cables
c. Try to replace control board or mainboard.
M alfunction Reason:
The inverter will have the error when negative power exceeds 3000W and lasts for more than 100ms