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9 Trouble shooting
Our q ua li ty contro l pro gr am assu res t ha t every i nv er te r is ma nu fa ct ur ed to accu ra te
specifications and is th or ou gh ly te st ed be fo re leaving o ur fa ct or y. I f y ou ha ve
diffi cu lt y in the o pe ra ti on of your i nv er te r, p le as e rea d thr ou gh th e fol lo wi ng
information to correc t th e pr ob le m.
9.1 Er ror Messag es display ed on LCD
An e rr or m es sa ge wi ll be d is pl ay ed on t he LC D sc re en wh en a fa ul t occurs. T he faults
consist of system fault and inverter fault.
You ma y be a dv is ed to co nt ac t manufacture r in s om e situation, plea se prov id e the
following information.
Information concer ni ng t he i nv er te r:
Serial number
Model number
Error m es sa ge o n LC D
Short description of the prob le m
Grid voltage
DC input voltage
Can you rep ro du ce t he f ai lu re? If yes, how?
Has this prob le m oc cu rr ed i n th e pa st ?
What was the ambient condition when the pro bl em o cc ur re d?
Manufacture r na me a nd m od el n um be r of t he P V pa ne l
Output power of the panel
Voc of the panel
Vmp of the panel
Imp of the panel
Number of panels in each string
Information concer ni ng t he P V pa ne ls :
If it is necessary to rep la ce t he u ni t, p le as e sh ip i t in t he o ri gi na l bo x.
9.2 Sy stem fault
System fault (system fa ul ts are mainly cau se d by sys te m ins te ad of in ve rt er, please
check the items as instructed below before re pl ac in g in ve rt er ).
Error message De sc ri pt io n Suggestion
Error : 12 4
No AC connection
Check AC wiring.
Check the status of AC brea ke r
PV Isolation Low
Insulation prob le m
1. Check if panel enclosure g ro un d
pro pe rl y.
2. Check if inverter grou nd p ro pe rl y.
3. Check if the DC brea ke r ge ts w et .
4. Check the impedance of PV (+) & PV (-)
between gro un d (m us t be m or e th an 5 0
KΩ or 1000 KΩ (VD E 01 26 )) . If t he e rror
message is displayed despite the above
checking passed, contact Grow at t.
Residual I High
Error : 12 6
Leakage curre nt t oo
high
1.Restart the invert.
2. If error m es sa ge s ti ll e xi st s, c on ta ct
Gro wa tt .
PV Voltage High
Error : 12 8
The DC input voltage is
exceeding the maximum
tolerable value.
1. Disconnect the DC switch immediately.
2. Check the voltage of each PV string with
multimerter.
3. If the voltage of PV string is lower than
1000V, cont ac t Gr ow at t.
Error : 12 5
Auto Test Failed
Auto test didn’t pa ss .
Restart inverter, repeat Auto Test, if
pro bl em s ti ll e xi st , co nt ac t Gr ow at t.
AC V Outrange
Error : 12 9
Utility grid voltage is out
of permissible range.
Please switch off D C sw it ch .
Check AC wiring, especially neutral and
gro un d wi re .
Check grid voltage is complied with local
grid st an da rd. Restart in ve rt er, if pro bl em
still exist, Contact Grow at t.
AC F Outrange
Error : 13 0
Utility grid freq ue nc y ou t
of permissible range.
Please switch off D C sw it ch .
Check AC wiring, especially neutral and
gro un d wi re .
Check grid freq ue nc y is c om pl ie d wi th l oc al
grid standard . Re st ar t in ve rt er, if pro bl em
still exist, Contact Grow at t.