Troubleshooting Of Faults In Lcd Screen - Epcom EPIG5K User Manual

7.2 Troubleshooting of faults in LCD screen

Type of fault
PV OV
BUS OVER/
RPH.OV
RPH.UV
RPH.OFR
RPH.UFR
Explanation
Overvoltage in PV input
Overvoltage of the bus/
Overvoltage of grid voltage
Under voltage of the grid
Over-frequency in the grid
Under-frequency in the grid
Troubleshooting
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.
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
SYSCOM / EPCOM
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
- 23 -
.