Recom RCM-10-TP-D, User Manual

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7. Troubleshooting
7.1 Fault Messages
RECOM RCM 4~25-TP-D series three-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 Troubleshooting
No Display
1. Check whether cables are all firmly connected and DC switch is on.
2. Check whether the input voltage meets the working voltage.
Mains Lost
1. Check whether the mains supply is lost.
2. Check whether the AC breaker and terminals are well connected.
Grid Voltage Fault
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.
Grid Frequency Fault
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.
ISO Over Limitation
1. Check whether the PV panels, cables, and connectors are broken or water
leaked.
2. Check whether there is a reliable inverter grounding line.
GFCI Fault
1. The ground current is too high.
2. Check whether the PV cable has a short circuit to ground.
PV Over Voltage
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.
Inverter Over
Temperature
1. Check whether the inverter is direct exposure to the sunlight.
2. Reduce ambient temperature.
DCI Fault
1. Restart the inverter, wait a moment for inverter recovery.
2. If the fault occurs repeatedly, please contact RECOM TECHNOLOGIES.
Bus Voltage Fault
SCI Fault
SPI Fault
E2 Fault
GFCI Device Fault
AC Transducer Fault
Relay Check Fail
Flash Fault
Fan Fault
1. Stop the inverter and disconnect the AC&DC cables.
2. Check whether the fan is blocked by foreign matters. If not, replace the fan.