Troubleshooting; Fault Messages - Recom RCM SP-D Series User Manual

7. Troubleshooting

7.1 Fault Messages

RECOM RCM 3.0~6.0-SP-D series single phase inverter is designed in accordance with grid
operation standard, and conform to the requirements of the safety and EMC. The inverter had
passed a series of rigorous tests to ensure it runs sustainably and reliably before shipment.
When a fault occurs, the corresponding fault messages will display on the OLED display, and in
this case, the inverter might stop feeding into grid. The fault messages and their corresponding
troubleshooting methods are listed below:
Error Message
No Display
Mains Lost
Grid Voltage Fault
Grid Frequency Fault
ISO Over Limitation
GFCI Fault
PV Over Voltage
Inverter Over
Temperature
DCI Fault
Bus Voltage Fault
SCI Fault
SPI Fault
E2 Fault
GFCI Device Fault
AC Transducer Fault
Relay Check Fail
Flash Fault
30
Troubleshooting
1. Check whether cables are all firmly connected and DC switch is on.
2. Check whether the input voltage meets the working voltage.
1. Check whether the mains supply is lost.
2. Check whether the AC breaker and terminals are well connected.
1. Check whether the safety regulation setting is correct.
2. Check the voltage of the grid. If the grid voltage exceeds the allowed range of
inverter protection parameters, please contact the local grid company to resolve.
3. Check whether the impendence of the AC cable is too high to lead the grid
voltage increased. Change a thicker AC cable if it is.
1. Check whether the safety regulation setting is correct.
2. Check the frequency of the grid. If the grid frequency exceeds the allowed range
of inverter protection parameters, please contact the local grid company to resolve.
1. Check whether the PV panels, cables, and connectors are broken or water
leaked.
2. Check whether there is a reliable inverter grounding line.
1. The ground current is too high.
2. Check whether the PV cable has a short circuit to ground.
1. Input voltage is too high.
2. Reduce the number of PV panels to make sure the open-circuit voltage of each
string is lower than the inverter max allowed input voltage.
1. Check whether the inverter is direct exposure to the sunlight.
2. Reduce ambient temperature.
1. Restart the inverter, wait a moment for inverter recovery.
2. If the fault occurs repeatedly, please contact RECOM TECHNOLOGIES.