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AC V Outrange
Grid voltage is out of range; Or the inverter’s voltage limits is incorrect.
If there are several inverters in parallel, and the inverter shows “AC V Outrange” after the
inverter feed to grid working for a while, perhaps the grid impedance is too high, please
record the AC wiring condition (including length and diameter of cables etc.) and record
whether assemble an isolated transformer on the output, and then contact Growatt service.
Meanwhile you can check as following steps:
Note: In this document, L1, L2, L3 means three phase live wire and N means neutral wire.
1. Check whether AC circuit breaker is off.
2. Measure the L (123) to N voltage to check whether public grid is cut off.
3. Turn off AC breaker and DC switch; check whether AC cables are all firmly and correctly
connected.
A. For checking the AC terminal outside inverter, please refer to Annex 1.
B. For checking the AC terminal inside inverter, please check as following steps:
1) Disconnect DC and AC breaker; make sure the inverter totally shut down.
2) Open the inverter cover by suitable screwdriver.
3) Refer to Annex 2 to remove control board and COM board.
4) Screw off 4 screws on metal panel as Fig.4.5.1 and remove metal panel.
Fig.4.5.1
5) Make sure all the points as Fig.4.5.2 or Fig.4.5.3 marked are tightened.
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