What does 'HW COMM2' mean on my Delta Inverter?
A 'HW COMM2' error on your Delta Inverter may indicate that the Red. CPU is idling, so check reset and crystal in Red. CPU. It could also mean that the communication connection is disconnected, so check the connection between Red. CPU and DSP.
Why does my Delta RPI-M20A show 'AC Volt High'?
A 'AC Volt High' error on your Delta Inverter can occur if the actual utility voltage exceeds the OVR setting. Check the utility voltage on the inverter terminal. It can also happen if the utility voltage exceeds the Slow OVR setting during operation, so check that as well. An incorrect country or Grid setting could also be the cause, so verify those settings. Finally, a detection circuit malfunction could be responsible; in that case, check the detection circuit inside the inverter.
Why is my Delta RPI-M20A showing 'AC Volt Low'?
The 'AC Volt Low' error on your Delta Inverter may be triggered by several factors. First, the actual utility voltage might be below the UVR setting; if so, check the utility voltage connection at the inverter terminal. Second, incorrect country or Grid settings can cause this, so check these settings. Third, there may be wrong connections in the AC plug, so verify the connection in the AC plug. Lastly, a detection circuit malfunction could be the cause; in that case, check the detection circuit inside the inverter.
What to do if my Delta RPI-M20A Inverter displays 'Temperature High'?
If your Delta Inverter is showing a 'Temperature High' error, it may be due to the ambient temperature exceeding 60 degrees. Check the installation environment. Another potential cause is a detection circuit malfunction, which would require checking the detection circuit inside the inverter.
What to do if my Delta RPI-M20A shows 'HW Connect Fail'?
If your Delta Inverter displays 'HW Connect Fail', it may be due to a power line being disconnected inside the inverter, so check the power lines inside the inverter. It may also be caused by a defective current feedback circuit, so check the current feedback circuit inside the inverter.
What does 'Relay Test Open' mean on my Delta Inverter?
A 'Relay Test Open' error on your Delta Inverter can occur if one or more relays are abnormal, so replace the defective relay(s). It may also occur if the driver circuit for the relay malfunction, so check the driver circuit inside the inverter. Also, the detection accuracy might not be correct for Vgrid and Vout, so check the Vgrid and Vout voltage detection accuracy.
What does 'HW NTC2 Fail' mean on my Delta RPI-M20A?
If your Delta Inverter is showing a 'HW NTC2 Fail' error, it may indicate that the ambient temperature is above 90 degrees or below -30 degrees. Check the installation ambient and environment. Another possible cause is a detection circuit malfunction, so check the detection circuit inside the inverter (RTB1).
What does 'HW NTC3 Fail' indicate on my Delta RPI-M20A Inverter?
A 'HW NTC3 Fail' error on your Delta Inverter may indicate that the ambient temperature is above 90 degrees or below -30 degrees. You should check the installation ambient and environment. It could also be due to a detection circuit malfunction, so check the detection circuit inside the inverter (RTG1).
What causes 'Ground Current' error on Delta RPI-M20A?
A 'Ground Current' error on a Delta Inverter may arise from several factors: a PV array insulation fault, so check the insulation of Solar inputs. It could also be due to large PV array capacitance between Plus to Ground or Minus to Ground, so check the capacitance (+ GND & - GND), and it must be less than 2.5uF. Install a external transformer if necessary. Additionally, either side of the boost driver or boost choke might malfunction, so check boost driver & boost choke. Finally, a detection circuit malfunction could be the cause; in that case, check the detection circuit inside the inverter.
What to do if Delta RPI-M20A Inverter shows 'Solar1 Low' error?
If your Delta Inverter displays a 'Solar1 Low' error, first check the Solar1 voltage connection to the inverter terminal, as the actual Solar1 voltage may be under the limit. If the actual Solar1 voltage is close to "0", some devices inside the inverter may be damaged, so check all switching devices in boost1. Finally, a detection circuit malfunction could also be the cause; in that case, check the detection circuit inside the inverter.
Outlines important safety instructions, including cautions, warnings, and danger notices.
Provides explanation and procedures for installing, operating, maintaining, and troubleshooting solar inverters.
Describes the 3-phase grid-tied solar inverter and its operation illustration.
Provides information on where to find more product details online.
Details the unpacking procedure for the RPI-M15A / M20A inverter.
Instructs users to check for damage and verify all included accessories.
Explains how to identify the inverter's model and specifications from its label.
Illustrates the inverter's exterior components and input/output interfaces.
Details the steps for securely mounting the inverter onto a wall using brackets and screws.
Provides recommended installation orientation, clearance requirements, and environmental considerations.
Covers precautions and checks before commencing any wiring tasks.
Explains the procedures and requirements for connecting the inverter to the AC grid.
Details how to connect the DC input from the PV array to the inverter.
Describes how to connect communication modules for data transfer and control.
Explains the pin definitions and connection methods for RS-485 communication.
Details the connections for Emergency Power Off and Dry Contact features.
Explains the inverter's LCD display and LED indicators for status.
Guides the user through the initial setup and configuration process.
Describes the main display screen showing output power, status, and energy data.
Details how to view AC and DC voltage, current, and power readings.
Explains how to access historical energy generation data on yearly, monthly, and daily bases.
Describes how to view recorded error and fault events.
Explains how to view historical maximum and minimum operating data.
Lists information such as serial number, firmware version, and inverter ID.
Introduces the section for adjusting various inverter functions and parameters.
Allows adjustment of language, date, time, screen saver, and display contrast.
Enables setting CO2 saving, earning value, and communication baud rates.
Covers advanced settings for installers, including ID, insulation, and country configurations.
Introduces functions for controlling active and reactive power output based on regulations.
Explains how to keep the inverter connected to the grid during voltage dips as per regulations.
Provides instructions on how to clean the inverter's fans.
Details the procedure for replacing a faulty fan unit.
Explains how to clean the air inlet and outlet filters.
Outlines the procedures for safely removing the inverter from operation for maintenance or storage.
Details screw torque specifications for fan and air inlet components.
Provides details on AC wire, AC plug, rubber rings, MC4 wire, and communication module assembly.
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