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The inverter will alarm about 80 error when on parallel mode, host can’t be detected for more than 1
seconds.
15 81 fault
81 fault means Host loss, it just happens on parallel mode.
Testing method:
b. Firstly, check if parallel cable is connected sufficiently and restart the inverter, and see if it can
become normal.
c. Secondly, after the check of parallel cable, if still abnormal, try to replace parallel cable
d. Thirdly, if above all methods can’t solve the issue, try to make inverters run separately, then observe if
81fault will disappear. Try to replace parallel board inside the inverter.
Fig.5 Parallel board
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