9
Trouble shooting
9
Trouble shooting
Our quality control program assures that every inverter is manufactured to accurate
specifications and is thoroughly tested before leaving our factory. If you have
difficulty in the operation of your inverter, please read through the following
information to correct the problem.
9.1 Error Messages displayed on LCD
An error message will be displayed on the LCD screen when a fault occurs. The faults
consist of system fault and inverter fault.
You may be advised to contact Growatt in some situation, please provide the
following information.
Information concerning the inverter:
Serial number
Model number
Error message on LCD
Short description of the problem
Grid voltage
DC input voltage
Can you reproduce the failure? If yes, how?
Has this problem occurred in the past?
What was the ambient condition when the problem occurred?
Manufacturer name and model number of the PV panel
Output power of the panel
Voc of the panel
Vmp of the panel
Imp of the panel
Number of panels in each string
Information concerning the PV panels:
If it is necessary to replace the unit, please ship it in the original box.
9.2 System fault
System fault (system faults are mainly caused by system instead of inverter, please
check the items as instructed below before replacing inverter).
Error message
Description
Suggestion
AC V Outrange
Utility grid voltage is out
of permissible range.
1. Check grid voltage.
2. Check AC wiring, especially the
ground wire.
3. If the error message still exists
despite the grid voltage being within
the tolerable range, contact Growatt.
ACF Outrange
Utility grid frequency out
of permissible range.
1. Check AC wiring and grid frequency.
2. If the error message is displayed
despite the grid frequency being within
the tolerable range, contact
Growatt
PV Isolation Low
Insulation problem
1. Check if panel enclosure ground
properly.
2. Check if inverter ground properly.
3. Check if the DC breaker gets wet.
4. Check the impedance of PV (+) & PV
(-) between ground (must be more than
800 K
). If the error message is
displayed despite the above checking
passed, contact Growatt.
Ω
Residual I High
Leakage current too high
1.Restart invert
2. If error message still exists, contact
Growatt.
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