What does it mean when my Delta Inverter says 'Solar2 High'?
If your Delta Inverter is displaying a 'Solar2 High' error, it suggests that the actual Solar2 voltage is exceeding 1000Vdc. To resolve this, adjust the solar array setting to bring the Voc below 1000Vdc. Another possibility is a detection circuit malfunction, which would require checking the detection circuit inside the inverter.
What to do if Delta RPI 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.
What should I do if my Delta RPI Inverter displays a 'Solar2 Low' error?
If your Delta Inverter shows a 'Solar2 Low' error, it might be because the actual Solar2 voltage is under the limit. Check the Solar2 voltage connection to the inverter terminal. If the actual Solar2 voltage is close to "0", it could indicate damage to some devices inside the inverter, so check all switching devices in boost2. Another possible cause is a detection circuit malfunction, requiring you to check the detection circuit inside the inverter.
What causes 'Ground Current' error on Delta RPI?
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 my Delta Inverter shows 'HW Con. Fail'?
If your Delta Inverter displays 'HW Con. Fail', it may be due to a wrong connection in the AC plug. Check the AC connection, ensuring it accords to the manual. Alternatively, a detection circuit malfunction could be the cause, so check the detection circuit inside the inverter.
What to do if Delta RPI displays 'HW FAN' error?
If your Delta Inverter is displaying a 'HW FAN' error, consider the following: 1. One or more fans might be locked; remove any object stuck in the fan(s). 2. One or more fans could be defective; replace the defective fan(s). 3. One or more fans might be disconnected; check the connections of all fans. 4. A detection circuit malfunction could be the cause; check the detection circuit inside the inverter.
What does 'SPD Fail' mean on my Delta Inverter and how to fix it?
An 'SPD Fail' error on your Delta Inverter can indicate several issues: 1. The inverter was struck by lighting, check inverter’s status. 2. One or more SPDs are defective, replace the defective SPD. 3. One or more SPDs are disconnected, check the connections of SPDs. 4. A detection circuit malfunction, check the detection circuit inside the inverter.
What could cause a 'Temperature Low' error on my Delta RPI Inverter?
A 'Temperature Low' error on your Delta Inverter might be triggered if the ambient temperature is below -30 degrees. Check the installation ambient and environment. Additionally, a detection circuit malfunction could be the cause, so check the detection circuit inside the inverter (RTM1, RTB1, RTG1 and RTH1).
What does 'HW NTC2 Fail' mean on my Delta RPI?
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 'AC Current High' mean on my Delta RPI?
A 'AC Current High' error on your Delta Inverter can happen if surge occurs during operation. It may also be caused by a defective driver for the inverter stage, so check the driver circuit in inverter stage. Another cause may be a defective switching device, so check all switching devices in inverter stage. Finally, a detection circuit malfunction could be the reason; in that case, check the detect circuit inside the inverter.
General| Efficiency | Up to 98.8% (depending on model) |
|---|---|
| Frequency | 50 Hz / 60 Hz |
| Model | RPI Series |
| Type | Inverter |
| Protection Rating | IP65 |
| Cooling | Natural convection |
| Category | Inverter |
| Cooling Method | Natural convection |
| Dimensions | Varies by model |
| Weight | Varies by model |
| Protection Features | Overvoltage, Short Circuit |
Covers DANGER, WARNING, and CAUTION levels for immediate harm, burns, or machine damage.
Describes the process of mounting the inverter bracket and the unit on the wall.
Details pre-wiring checks, DC fuse info, and critical safety warnings.
Guides on connecting the inverter to the AC grid for 3-phase systems.
Provides instructions and specifications for connecting the DC input from the PV array.
Guides users through the initial startup process, including language, country, and protocol settings.
Introduces active and reactive power control functions, including Power Limit and Power vs. Frequency modes.
Details how to enable FRT to maintain grid connection during voltage drops.
Provides step-by-step instructions for replacing a faulty SPD.
Guides on checking and replacing the internal string fuses.
Lists error codes, possible causes, and troubleshooting actions for system errors.
Lists warning messages, possible causes, and troubleshooting actions.
Lists fault messages, possible causes, and troubleshooting actions.
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