How to fix AC Freq High (E01) error on my Delta M80U Inverter?
If the Delta Inverter displays 'AC Freq High (E01)', it could be due to several reasons: 1. The actual utility frequency is over the OFR setting, so check the utility frequency. 2. The Grid code setting is incorrect, so check it. 3. In case the issue persists, there may be a detection circuit malfunction, and you should contact customer service for technical support.
Why does my Delta Inverter show 'No Grid (E09)' error?
If your Delta Inverter is showing a 'No Grid (E09)' error, the possible causes are: 1. The AC breaker is OFF. In this case switch on the AC breaker. 2. There is a disconnection in the AC terminal. In this case check the connection in the AC terminal and ensure it connects to the inverter.
What should I do if my Delta Inverter displays AC Volt Low (E10, E15, E20)?
If your Delta Inverter displays 'AC Volt Low' (E10, E15, E20), the issue might stem from a few potential causes. Initially, verify that the actual utility voltage is within the suitable range, as it may be under the UVR setting. Also, incorrect Grid code or Grid settings could be the cause, so check them. Another potential cause is wrong connections in the AC terminal, so check the AC terminal connections. If these steps don't resolve the issue, there might be a detection circuit malfunction, in which case you should contact customer service for technical support.
What does HW Red ADC2 (F19) error mean on my Delta Inverter?
If your Delta Inverter displays 'HW Red ADC2 (F19)', potential causes include: 1. Insufficient input power, so check the input voltage, which must be >150Vdc. 2. Auxiliary power circuitry malfunction, so check the auxiliary circuitry inside the inverter. 3. A detection circuit malfunction, and you should contact customer service for technical support.
What does HW AC OCR (F45) error mean on my Delta M80U?
If your Delta Inverter displays 'HW AC OCR (F45)', it could be due to: 1. Large Grid harmonics, so check the utility waveform. Grid connection of inverter needs to be far away from non-linear load if necessary. 2. Switching device is defective, so check all switching devices in inverter stage. 3. A detection circuit malfunction, so contact our customer service for technical support.
What does Bus Unbal. (F30) error mean on my Delta Inverter?
If your Delta Inverter displays 'Bus Unbal. (F30)', it may be caused by: 1. Not totally independent or parallel between inputs, so check the inputs connections. 2. PV Array short to Ground, so check the PV Array insulation. 3. Driver for boost is defective or disconnected, so contact customer service for technical support.
What does RLY Short (F28) error mean on my Delta M80U Inverter?
If your Delta Inverter displays 'RLY Short (F28)', the possible causes are: 1. One or more relays are sticking, so check the connection in AC terminal. 2. The driver circuit for the relay malfunction, so contact customer service for technical support.
What does RCMU Fail (F27) error indicate on my Delta M80U Inverter?
If your Delta Inverter displays 'RCMU Fail (F27)', it could be due to: 1. RCMU is disconnected, so check the RCMU connection inside the inverter. 2. A detection circuit malfunction, and you should contact customer service for technical support.
What causes HW Con. Fail (F26) error on my Delta M80U Inverter?
If your Delta Inverter is showing 'HW Con. Fail (F26)', the problem might be: 1. Power line is disconnected inside the inverter, so check the power lines inside the inverter. 2. Current feedback circuit is defective and you should contact customer service for technical support.
What does Ground Cur. (F24) error mean on my Delta Inverter?
If your Delta Inverter displays 'Ground Cur. (F24)', it might be because: 1. PV array insulation fault, so check the insulation of Solar inputs. 2. Large PV array capacitance between Plus to Ground or Minus to Ground, so check the capacitance (+ GND & - GND), must < 2.5uF. Install external transformer if necessary. 3. Either side of boost driver or boost choke malfunction, so contact customer service for technical support.
General| Cooling Method | Forced air cooling |
|---|---|
| Enclosure Rating | IP20 |
| Input Frequency | 50/60Hz ±5% |
| Output Voltage | 3-phase 0 ~ Input Voltage |
| Braking Unit | Built-in braking unit |
| Control Mode | V/f control, Sensorless Vector Control |
| Protection Functions | Over-voltage, Over-current, Overload, Over-heat, Low-voltage, Ground fault, Short circuit |
| Overload Capacity | 150% for 60 seconds |
| Efficiency | 98% (Typical) |
| Operating Temperature | -10°C ~ +50°C (14°F ~ 122°F) |
| Storage Temperature | -20°C |
| Altitude | Below 1000m (derating required above 1000m) |
| Ambient Humidity | Less than 90% RH (non-condensing) |
Covers legal provisions and the target audience for the inverter manual.
Details operational requirements and compatibility with PV modules and grid.
Lists applicable inverter models and provides an overview.
Details M80/60U components and provides a packing list.
Instructions for physically mounting the inverter, covering wall and tilt installations.
Specific steps and considerations for mounting inverter vertically on a wall.
Guides on horizontal or tilted installation, including bracket usage.
Explains bracket installation, differentiating new/old models.
Dimensions and details for mounting brackets on new model inverters.
Dimensions and installation for mounting brackets on older model inverters.
Describes installation of shielding plates included with the inverter hardware.
Instructions for removing and re-installing wiring box cover for proper operation.
Covers safety and requirements for connecting AC wiring to the inverter.
Details AC conductor preparation, including sizing, stripping, and cable type.
Steps for preparing AC switch terminals using cage-clamp design for proper connection.
Details AC conduit entry, connections, and terminal block for the M80/60U_120 model.
AC wiring instructions for M80/60U_121 model with RSD.
Details AC wiring for M80/60U_121 model without RSD.
Details AC conduit entry and connections for M80/60U_122 model's AC terminal block.
Covers critical safety hazards and precautions for DC wiring installation.
Instructions for connecting DC terminals and string wiring for M80/60U_120 models.
Details DC wiring, conductor sizing, and connection options for M80/60U_121 models.
Explains DC wiring using MC4 connectors for M80/60U_122 models and provides wiring illustration.
Shows locations of DC grounding bars for different inverter models (-120, -121, -122).
Details mounting procedure for the DC side ground bar on 121/122 models.
Introduces communication module and its terminals: VCC, RS-485, EPO, and Digital Inputs.
Provides steps for accessing and removing the communication module from the wiring box chassis.
Explains RS-485 terminal block pin definitions and daisy-chaining for multiple inverters.
Details EPO function and digital power reduction controls via terminal block.
Describes terminal for controlling rapid shutdown system (RSS) as per NEC 2017.
Precautions for performing on-site insulation tests, ensuring DC switches are OFF.
Introduces LCD display, programming keys, and LEDs for viewing data and status.
Guides initial setup: language, grid code, and RS-485 protocol.
Describes homepage display showing status, output power, and energy data.
Lists inverter functions adjustable via LCD panel and their manual subsections.
Details viewing AC/DC measurements and monitoring string current for M80/60U_122.
Explains viewing lifetime energy runtime and event logs (error, fault, grid report).
Allows viewing static data like serial number, firmware, and connected parameters.
Covers setting language, date, time, and RS-485 baud rate.
Explains access levels (User, Installer, Manufacturer) for adjusting inverter settings.
Details setting RS-485 address (Inverter ID) and insulation resistance measurement.
Explains setting grid code for compatibility with local voltage, frequency, and grid standards.
Allows adjustment of smart inverter parameters like voltage/frequency ride-through and soft start.
Describes PID function to prevent PV module degradation and its setting options.
Explains RCMU function for monitoring residual current and disconnecting inverter when high.
Covers enabling EPO function and selecting AC connection types (3P3W/3P4W).
Details anti-islanding protection to prevent feeding power to grid during outages.
Explains AFCI function to detect and break arcs for fire prevention, default setting is 'ON'.
Allows confirmation of grid code parameters like voltage and frequency protection settings.
Introduces active and reactive power control modes, requiring password for access.
Allows reduction of output power to a percentage of rated power via Set Point.
Details how inverter reduces output power based on grid frequency rising and parameter tuning.
Explains how inverter reduces output power when grid voltage rises above lock-in voltage.
Allows setting a fixed power factor (cosphi) for feeding reactive power to the grid.
Describes feeding reactive power based on output active power and grid voltage conditions.
Enables assigning a percentage of reactive power in the Constant Q page.
Details controlling reactive power output based on grid voltage levels.
Explains enabling FRT function to maintain grid connection during voltage drops and parameter adjustment.
Provides procedures for safely removing and re-installing the wiring box cover for maintenance.
Details steps for safely removing the wiring box cover, including power off and weather precautions.
Provides steps for properly re-installing the wiring box cover, including screw tightening and alignment.
Details the replacement procedure for AC and DC Surge Protection Devices (SPD).
Details specifications for PV combiner fuses and fuse holders used in the inverter.
Provides procedures for cleaning filters and replacing smart fans for cooling the inverter's electronics.
Details steps for removing and reassembling the fan module in the Wiring Box compartment.
Describes the modular fan tray in the PM and the procedure for its removal.
Provides steps to remove and clean the air inlet filter from the Power Module fan tray.
Details the procedure to release AFCI fault protection after addressing arcing energy issues.
Provides instructions for safely de-commissioning the inverter from operation for maintenance or replacement.
Lists error codes, their possible causes, and recommended actions for troubleshooting.
Lists warning codes, their possible causes, and recommended actions for troubleshooting.
Lists fault codes, their possible causes, and recommended actions for troubleshooting.
Lists fault codes, their possible causes, and recommended actions for troubleshooting.
Lists fault codes, their possible causes, and recommended actions for troubleshooting.
Lists fault codes, their possible causes, and recommended actions for troubleshooting.
Provides a checklist of information required for efficient service calls to Delta's hotline.
Details DC input and AC output specifications for M80U_120, M80U_121, and M80U_122 models.
Covers efficiency ratings, communication protocols, safety certifications, and smart inverter functions.
Details DC input and AC output specifications for M60U_120, M60U_121, and M60U_122 models.
Covers efficiency ratings, communication protocols, safety certifications, and smart inverter functions for M60U.
Provides low/high voltage ride-through set-points and timing parameters for Rule 21.
Provides low/high frequency ride-through set-points and timing parameters for Rule 21.
Details normal and soft-start ramp rate settings for CA R21 compliance.
Specifies settings for power factor, voltage ranges, and power limits for CA R21.
Details Volt/VAr mode settings for reactive power control according to CA R21.
Details Frequency-Watt settings for power response to frequency changes per CA R21.
Details Volt-Watt settings for active power reduction based on voltage levels per CA R21.
Provides frequency ride-through settings for O’ahu, Hawai’i Island, and Maui (HECO A).
Provides frequency ride-through settings for Moloka’i and Lana’i (HECO B).
Provides voltage ride-through settings for O’ahu, Hawai’i Island, Maui, Moloka’i, and Lana’i.
General assembly notes and screw torque specifications applicable to all inverter models.
Details assembly steps, locations, screw torques, and conductor sizes for the 120 model.
Assembly details, torques, and conductor sizes for the 121 model with RSD.
Assembly steps, torques, and conductor sizes for the 121 model without RSD.
Assembly notes, screw torques, and conductor cross-sections for the 122 model.
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