What to do if REFU Inverter showing overtemperature LT 1?
If your REFU Inverter displays an overtemperature LT 1 error, it indicates a cooler overtemperature (right). Check the temperature of the direct surroundings and reduce it as required.
Why REFU Inverter shows external cut-off error?
If your REFU Inverter detects an external cut-off, it means external monitoring has triggered a disconnection. Verify the external cut-off signal. Possible causes include wire breakage or a wrong sensor selection. Refer to the manual for the correct settings.
How to troubleshoot PM isolation RCD SR error on REFU Inverter?
If your REFU Inverter shows a PM isolation RCD SR error, it means the measured value of the residual currents are over the limits. Check system isolation. If you consider the system isolation to be in order, contact Service.
What causes grid frequency LT error in REFU REFUsol 20K?
If your REFU Inverter displays a grid frequency LT error, it means the power section has detected under/overfrequency. Check the frequency of the phases. If you consider the frequencies to be in order, contact the Service.
Why REFU REFUsol 20K Inverter showing overvoltage 2?
If your REFU Inverter detects overvoltage 2, the phase voltage has exceeded the limit value of the voltage average monitor for too long. Monitor line voltages and analyze the grid. If the line voltages appear to be in order, contact Service.
What to do if REFU REFUsol 20K Inverter showing overfrequency?
If your REFU Inverter is detecting an overfrequency, it means the grid frequency has exceeded the limit value. Check the frequency of the phases. If you believe the frequencies are normal, contact Service.
How to fix grid overvoltage on REFU Inverter?
If your REFU Inverter displays a grid overvoltage error, it means a phase overvoltage (AC) has been detected. Check the phase voltages using a true RMS measurement device. If the phase voltages appear normal, contact Service.
Specifies the target audience and required qualifications for operating the inverter safely.
Highlights potential dangers from improper handling, installation, or use of the inverter.
Details safety measures to prevent contact with live electrical parts.
Warns about potential burns from hot surfaces on the inverter housing.
Provides safety instructions for handling and assembling the inverter to prevent injuries.
Specifies the conditions and restrictions for the inverter's installation location.
Provides steps for powering up the inverter and initial checks.
Guides through initial setup of country code and language for grid parameters.
Details the sequence of events during inverter startup and self-test.
Step-by-step guide to change the inverter's display language.
Instructions on how to limit the inverter's power output.
Explains the use of REFUset software for firmware updates and parameter settings.
Explains the self-test routine and handling of detected errors.
Describes transient offline states and automatic fault acknowledgement.
Details types of faults, their indicators, and the fault memory.
General| Rated Power | 20 kW |
|---|---|
| AC nominal voltage | 400 V |
| AC voltage range | 310 V - 480 V |
| Nominal grid frequency | 50 Hz / 60 Hz |
| Max. DC voltage | 1000 V |
| Number of MPP trackers | 2 |
| Max. input current per MPP tracker | 33 A |
| Weight | 45 kg |
| Frequency | 50 Hz / 60 Hz |
| Topology | Transformerless |
| Operating Temperature Range | -25°C to +60°C |
| Protection Rating | IP65 |
| Max. apparent AC power | 20000 VA |
| Max. DC power | 21000 W |
| Input Voltage Range | 200 V - 1000 V |
| Maximum Efficiency | 98.2% |
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