Epcom EPIG5K, User Manual

Page: 25 / 33

- 23 -
7.2 Troubleshooting of faults in LCD screen
Type of fault Explanation Troubleshooting
PV OV Overvoltage in PV input 1. Disconnect AC circuit breaker.
2. Disconnect DC circuit breaker.
3. Check the voltage of PV side.
4. Restart the inverter until the DC voltage
returns to allowable range.
BUS OVER/
RPH.OV
Overvoltage of the bus/
Overvoltage of grid voltage
1. Disconnect AC circuit breaker.
2. Disconnect DC circuit breaker.
3. Check the voltage of grid side.
4. If local grid condition exceeds AC
requirements of inverter, reset the protecting
parameters. See “8.2.4 PARA. SET”.
And if local grid voltage exceeds the upper
limit value of “Vgrid-max”, or if local grid
voltage is under the lower limit value of
“Vgrid-min”, please contact your local
electricity company to adjust the grid voltage.
5. If the fault still exists, please contact
RPH.UV
Under voltage of the grid
RPH.OFR Over-frequency in the grid
1. Disconnect AC circuit breaker.
2. Disconnect DC circuit breaker.
3. Check the frequency of grid side.
4. If local grid condition exceeds AC demands
of inverter, reset the protective parameters.
See “8.2.4 PARA. SET”.
And if local grid frequency exceeds the
upper limit value of “Fgrid-max”, or if local
grid frequency is under the lower limit value
of “Fgrid-min”, please contact your local
electricity company to adjust the grid
frequency.
5. Close DC circuit breaker.
6. Close AC circuit breaker.
7. If the fault can’t be solved, please contact
6<6&20(3&20
.
RPH.UFR
Under-frequency in the grid