9
4 07 fault
07fault means over load time out.
Testing method:
a. Try to disconnect the load from inverter, then observe if inverter has normal AC output 230V and no
07fault again.
b. If still abnormal, most of time it is caused by control board.
Solution:
After the check of load, try to replace control board or mainboard
Malfunction Reason:
There are 2 conditions that will trigger the fault:
a. Load power has been greater than 112% and lower than 150% and lasted for 10s.
b. Load power has been greater than 150% and lasted for 2s.
One control board had been returned back from client and found one resistor on control board was
damaged so that it cause 07 fault.
Fig.6 07fault control board
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