Ginlong Solis-25K-LV Installation And Operation Manual page 25

9. Troubleshooting
Alarms Cause
OV-G-F: Over • Inverter detects grid
Grid Frequency Frequency as too high
• Inverter does not
NO-GRID
detect the grid
OV-DC: DC
voltage is too • Inverter detects High DCV
high
OV-BUS: DC
• Inverter detects High
BUS voltage is
DCV on internal bus
too high
UN-BUS: DC
• Inverter detects low DCV
BUS voltage is
on internal bus
too low
.46.
Solution
Test – DC switch OFF
• Check frequency at the inverter test points
• If Frequency measures high, adjust upper
limit with permission from utility
• Check LCD reading, may be a bad
measurement circuit
Test – DC Switch ON
• Check grid standard
• Replace inverter
Test – DC switch OFF
• Check AC at the inverter test points
• L-L, L-GND
• Do NOT tell me 240VAC
• Check LCD reading, may be a bad
measurement circuit
Test – DC Switch ON
• Check grid standard
• Replace inverter
Test – DC switch OFF
• Check DC at the inverter test points
• If DCV is high, too many panels in the string
Test – DC Switch ON
• Check LCD reading, may be a bad
measurement circuit
• Replace inverter
Test
• Measure DC and AC voltages
• Compare with LCD
• Replace Inverter
• Internal damage
• Wire came loose during shipping
Test
• Measure DC and AC voltages
• Compare with LCD
• Replace Inverter
• Internal damage
• Wire came loose during shipping
9. Troubleshooting
Alarms Cause
• Inverter detects grid
GRID-INTF:
instability, internal fault
Grid unstable
current high
INI-PRO:
• Master and Slave DSP
Initialization
have different values
Protection
TEM-PRO:
• Inverter detects high
Temperature
ambient temperature >60C
Protection
GROUND-PRO:
• Inverter detects low DC
Ground
insulation resistance
Protection
• Inverter detects arc
ARC-FAULT
in DC circuit
Screen OFF • Inverter internally
with DC applied damaged
Table 9.1 Fault messages and descriptions
Solution
Test – With DC Switch OFF
• Measure AC voltage
• Test AC line for THD
• Test – With DC Switch ON
Test AC line for THD
• Multiple inverters/turn one off
• Impedance matching adjustment or box
• Internal damage
• Wire came loose in shipping
Reset Inverter
• DC switch OFF
• Wait until all lights/LCD turn off
• DC switch ON
• Replace inverter
Inspect installation
• Check heatsink for obstructions/ventilation
• Is inverter in direct sunshine
• Measure ambient temperature near inverter
• If temp is in range replace inverter
Inspect installation
• Reset inverter
• Note weather conditions when alarm occurs
• Measure insulation resistance
• If normal, measure in SAME weather as alarm
• Physically check cables
• Replace inverter
1.Inspect installation
• Check cable with string tester
• Physically check cables
• Inspect panel junction boxes
• Inspect cable connections
2.Restart inverter
3.Replace inverter
1.Do not turn off the DC switches as it will
damage the inverter.
2.Please wait for the solar irradiance reduces
and confirm the string current is less than
0.5A with a clip-on ammeter and then turn
off the DC switches.
3.Please note that any damages due to wrong
operations are not covered in the device
warranty.
.47.