1. Introduction
1.1 Purpose
This manual describes the assembly, installation, operation, and troubleshooting of the Y&H 3600W Hybrid Solar Inverter. Please read this manual carefully before installation and operation for future reference.
1.2 Scope
This manual provides essential safety and installation guidelines, along with information on tools and wiring requirements for the inverter.
1.3 Features
- Pure sine wave solar inverter (on/off Grid)
- Configurable input voltage range for home appliances and personal computers via LCD setting
- Configurable battery charging current based on applications via LCD setting
- Configurable AC/Solar Charger priority via LCD setting
- Compatible with mains voltage or generator power
- Auto restart while AC is recovering
- Overload, over temperature, and short circuit protection
- Smart battery charger design for optimized battery performance
- Cold start function
- WIFI & GPRS available for iOS and Android (optional module required)
- Inverter running without battery
- One-key restoration to factory settings
- Built-in lithium battery automatic activation
- Built-in MPPT 120A Solar Charge Controller
- High PV input voltage range (90~450VDC)
- Built-in anti-dust kit for harsh environments
1.4 Basic System Architecture
This inverter/charger combines inverter, solar charger, and battery charger functions to provide uninterruptible power. It can power various appliances in home or office environments, including motor-type appliances. The system can integrate with a generator or utility power and PV modules. Consult your system integrator for specific requirements.
This diagram illustrates a typical wiring setup for the hybrid solar inverter, connecting to solar panels, a generator/mains power, a 24V battery, and dual AC outputs for main and secondary loads. Key specifications are also shown, including PV power, MPPT range, AC input/output, and battery type.
1.5 Product Overview
The inverter features a comprehensive LCD display for user-configurable settings and easy monitoring. Below is an overview of the unit's components.
This image displays the front and side views of the inverter, highlighting its LCD screen, LED indicators, and various connection ports. It also shows the internal components and cooling system.
- LCD display
- Status indicator
- Charging indicator
- Fault indicator
- Function buttons
- Power on/off switch
- AC input
- Main output
- Second output
- Battery input
- PV input
- Anti dust kit
- WIFI communication/RS-232 port
- Battery communication/RS-485 port
- Circuit breaker
2. Safety Instructions
WARNING: This chapter contains important safety and operating instructions. Read and keep this manual for future reference.
- Before using the unit, read all instructions and cautionary markings on the unit, the batteries, and all appropriate sections of this manual.
- CAUTION: To reduce risk of injury, charge only deep-cycle lead-acid type rechargeable batteries. Other types of batteries may burst, causing personal injury and damage.
- Do not disassemble the unit. Take it to a qualified service center when service or repair is required. Incorrect re-assembly may result in a risk of electric shock or fire.
- To reduce risk of electric shock, disconnect all wirings before attempting any maintenance or cleaning. Turning off the unit will not reduce this risk.
- CAUTION: Only qualified personnel can install this device with a battery.
- NEVER charge a frozen battery.
- For optimum operation of this inverter/charger, please follow the required specifications to select appropriate cable size. It's very important to correctly operate this inverter/charger.
- Be very cautious when working with metal tools on or around batteries. A potential risk exists to drop a tool to spark or short circuit batteries or other electrical parts and could cause an explosion.
- Please strictly follow the installation procedure when you want to disconnect AC or DC terminals. Please refer to the INSTALLATION section of this manual for details.
- One piece of 150A fuse is provided as over-current protection for the battery supply.
- GROUNDING INSTRUCTIONS: This inverter/charger should be connected to a permanent grounded wiring system. Be sure to comply with local requirements and regulations to install this inverter.
- NEVER cause AC output and DC input short-circuited. Do NOT connect to the mains when DC input short circuits.
- Warning!! Only qualified service persons are able to service this device. If errors still persist after following the troubleshooting table, please send this inverter/charger back to a local dealer or service center for maintenance.
3. Installation
3.1 Unpacking and Inspection
Before installation, inspect the unit to ensure nothing inside the package is damaged. The package should contain: The unit x 1, User manual x 1.
3.2 Preparation
Before connecting any wirings, remove the bottom cover by unscrewing two screws.
3.3 Mounting the Unit
WARNING: Suitable for mounting on concrete or other non-combustible surfaces only.
Consider the following points when selecting where to install the unit:
- Do not mount the inverter on flammable construction materials.
- Mount on a solid surface.
- Install this inverter at eye level to allow the LCD display to be read at all times.
- For proper air circulation to dissipate heat, allow a clearance of approximately 20 cm to the side and approximately 50 cm above and below the unit.
- The ambient temperature should be between 0°C and 55°C for optimal operation.
- The recommended installation position is to be adhered to the wall vertically.
- Ensure sufficient heat dissipation and space for removing wires.
Install the unit by screwing two M6 screws into the wall.
3.4 Battery Connection
CAUTION: For safety and compliance, install a separate DC over-current protector or disconnect device between the battery and inverter. Refer to the table below for typical amperage and required fuse/breaker size.
WARNING: All wiring must be performed by qualified personnel. Use appropriate cable for battery connection to reduce risk of injury.
| Model | Wire Size | Cable (mm²) | Torque value (max) |
|---|---|---|---|
| 3.6KW/6.2KW | 1 x 2AWG | 25 | 2 Nm |
Follow these steps for battery connection:
- Remove 18 mm of insulation sleeve from positive and negative conductors.
- Suggest using bootlace ferrules on the end of positive and negative wires with a proper crimping tool.
- Connect all battery packs as shown in the diagram below.
- Insert the battery wires flatly into the inverter's battery connectors. Ensure bolts are tightened with a torque of 2 Nm in a clockwise direction. Verify correct polarity at both the battery and inverter/charger, and ensure conductors are tightly screwed into the battery terminals. Recommended tool: #2 Pozi Screwdriver.
This diagram illustrates how to connect multiple 12V batteries in series to achieve the required 24V for the inverter, showing both 3.6KW and 6.2KW configurations.
WARNING: Shock Hazard! Installation must be performed with care due to high battery voltage in series.
CAUTION!! Before making the final DC connection or closing the DC breaker/disconnector, ensure positive (+) is connected to positive (+) and negative (-) is connected to negative (-).
3.5 AC Input/Output Connection
CAUTION!! Before connecting to an AC input power source, install a separate AC breaker between the inverter and the AC input power source. This ensures secure disconnection during maintenance and over-current protection. Recommended AC breaker: 32A for 3.6KW and 50A for 6.2KW.
CAUTION!! There are two terminal blocks with “IN” and “OUT” markings. Do NOT mis-connect input and output connectors.
WARNING! All wiring must be performed by qualified personnel. Use appropriate cable for AC input connection to reduce risk of injury.
| Model | Gauge | Cable (mm²) | Torque Value |
|---|---|---|---|
| 3.6KW | 12 AWG | 4 | 1.2 Nm |
| 6.2KW | 10 AWG | 6 | 1.2 Nm |
Follow these steps to implement AC input/output connection:
- Before making AC input/output connection, open the DC protector or disconnector first.
- Remove 10 mm of insulation sleeve for six conductors. Shorten phase L and neutral conductor N by 3 mm.
- Insert AC input wires according to polarities indicated on the terminal block and tighten the terminal screws. (L→LINE (brown or black), N→Neutral (blue)).
This diagram illustrates the correct wiring for AC input, showing the connection points and the process of securing the wires.
WARNING: Ensure the AC power source is disconnected before attempting to hardwire it to the unit.
- Then, insert AC output wires according to polarities indicated on the terminal block and tighten the terminal screws. (L→LINE (brown or black), N→Neutral (blue)).
- Make sure the wires are securely connected.
CAUTION: Appliances such as air conditioners require 2-3 minutes to restart. If a power shortage occurs and recovers quickly, it can damage connected appliances. Check if your air conditioner has a time-delay function. Otherwise, the inverter/charger may trigger an overload fault to protect the appliance, but internal damage to the air conditioner may still occur.
3.6 PV Connection
CAUTION: Before connecting to PV modules, install a separate DC circuit breaker between the inverter and PV modules.
WARNING! It's very important for system safety and efficient operation to use appropriate cable for PV module connection. To reduce risk of injury, use the proper recommended cable size as below.
| Model | Wire Size | Cable (mm²) | Torque value (max) |
|---|---|---|---|
| 3.6KW/6.2KW | 1 x 12AWG | 4 | 1.2 Nm |
PV Module Selection:
When selecting proper PV modules, consider these parameters:
- Open circuit Voltage (Voc) of PV modules must not exceed the max. PV array open circuit voltage of the inverter.
- Open circuit Voltage (Voc) of PV modules should be higher than the min. battery voltage.
| INVERTER MODEL | 3.6KW | 6.2KW |
|---|---|---|
| Max. PV Array Open Circuit Voltage | 500Vdc | |
| PV Array MPPT Voltage Range | 60Vdc~450Vdc | |
PV Module Wire Connection:
Follow these steps to implement PV module connection:
- Remove 10 mm of insulation sleeve for positive and negative conductors.
- Suggest using bootlace ferrules on the end of positive and negative wires with a proper crimping tool.
- Check correct polarity of wire connection from PV modules and PV input connectors. Connect the positive pole (+) of the connection wire to the positive pole (+) of the PV input connector, and the negative pole (-) of the connection wire to the negative pole (-) of the PV input connector. Recommended tool: 4mm blade screwdriver.
This diagram illustrates the correct method for connecting PV module wires to the inverter, emphasizing polarity and secure fastening.
3.7 Final Assembly
After connecting all wirings, put the bottom cover back by screwing the two screws.
3.8 Communication Connection
The inverter supports various communication methods for monitoring and control:
- Wi-Fi Cloud Communication (Optional): Use the supplied communication cable to connect the inverter and a Wi-Fi module. Download the SmartESS APP from the App Store and refer to the “Wi-Fi Plug Quick Installation Guideline” to set up the network and register. The inverter status can then be viewed via the mobile APP or a computer webpage.
- GPRS Cloud Communication (Optional): Use the supplied communication cable to connect the inverter and a GPRS module, then apply external power to the GPRS module. Download the SmartESS APP from the App Store and refer to the "GPRS RTU Quick Installation Guideline" to set up the network and register. The inverter status can then be viewed via the mobile APP or a computer webpage.
- Battery Communication: Communication between the battery and the inverter can be realized through the battery communication interface, allowing the inverter and lithium battery to exchange information.
This image shows the inverter connected to a Wi-Fi/GPRS data acquisition module (optional, purchased separately) for monitoring and control via the SmartESS app on a smartphone.
4. Operation
4.1 Power ON/OFF
Once the unit is properly installed and batteries are connected, simply press the On/Off switch (located on the bottom of the case) to turn on the unit.
This image shows the side of the inverter, indicating the location of the power on/off switch.
4.2 Operation and Display Panel
The operation and display panel is located on the front of the inverter. It includes three indicators, four function keys, and an LCD display, providing information on operating status and input/output power.
This image shows the inverter's LCD display and the function buttons used for navigation and settings.
| LED Indicator | Messages |
|---|---|
| INV/AC (Green Solid On) | Output is powered by utility in Line mode. |
| INV/AC (Green Flashing) | Output is powered by battery or PV in battery mode. |
| CHG (Green Solid On) | Battery is fully charged. |
| CHG (Green Flashing) | Battery is charging. |
| FAULT (Red Solid On) | Fault occurs in the inverter. |
| FAULT (Red Flashing) | Warning condition occurs in the inverter. |
| Function Key | Description |
|---|---|
| ESC | To exit setting mode |
| UP | To go to previous selection |
| DOWN | To go to next selection |
| ENTER | To confirm the selection in setting mode or enter setting mode |
4.3 LCD Display Icons
The LCD display uses various icons to convey system status and information. Refer to the manual for a detailed breakdown of each icon and its meaning.
| Icon | Function description |
|---|---|
| Input Source Information | |
| AC Input Icon | Indicates the AC input. |
| PV Input Icon | Indicates the PV input. |
| Digital Readout | Indicates input voltage, input frequency, PV voltage, charger current (if PV in charging for 3.6KW models), charger power, battery voltage. |
| Configuration Program and Fault Information | |
| Program Number | Indicates the setting programs. |
| Warning/Fault Code | Indicates the warning and fault codes. |
| Output Information | |
| Output Data | Indicates output voltage, output frequency, load percent, load in VA, load in Watt, and discharging current. |
| Battery Information | |
| Battery Icon | Indicates battery status. |
| Load Information | |
| Overload Icon | Indicates overload. |
| Mode Operation Information | |
| Mains Connection Icon | Indicates unit connects to the mains. |
| PV Panel Connection Icon | Indicates unit connects to the PV panel. |
| AC Bypass Icon | Indicates load is supplied by utility power. |
| Utility Charger Icon | Indicates the utility charger circuit is working. |
| DC/AC Inverter Icon | Indicates the DC/AC inverter circuit is working. |
| Mute Operation | |
| Mute Icon | Indicates unit alarm is disabled. |
4.4 LCD Setting
After pressing and holding the ENTER button for 3 seconds, the unit will enter setting mode. Use the “UP” or “DOWN” buttons to select setting programs, then press “ENTER” to confirm or “ESC” to exit. The LCD display information can be switched by pressing “UP” or “DOWN” key. The selectable information includes input voltage, input frequency, PV voltage, charging current, charging power, battery voltage, output voltage, output frequency, load percentage, load in Watt, load in VA, load in Watt, DC discharging current, and main CPU Version.
Key configurable settings include:
- Output Source Priority: Configure the load power source priority (Utility first, Solar first, SBU priority).
- Maximum Charging Current: Set the total charging current for solar and utility chargers.
- AC Input Voltage Range: Select acceptable AC input voltage range (e.g., for appliances or UPS).
- Battery Type: Choose between AGM, Flooded, User-Defined, or various Lithium battery communication options (LIB, LIC, LIP, LIL).
- Auto Restart: Enable/disable auto restart for overload or over temperature events.
- Output Frequency & Voltage: Configure the output frequency (50Hz/60Hz) and voltage (110V/120V/220V/230V/240V).
- Maximum Utility Charging Current: Set the maximum charging current from utility.
- Battery Equalization: Enable/disable battery equalization, set equalization voltage, time, and interval.
- GRID-Tie Operation: Configure operation mode (Off-grid, Hybrid) and GRID-tie current.
- Display Settings: Adjust LED pattern light, backlight control, and auto return to default display screen.
For a complete list of settings and detailed instructions, please refer to the official user manual PDF: User Manual (PDF).
4.5 Operating Mode Description
The inverter operates in various modes, each with specific characteristics:
- Standby Mode: The inverter is idle, consuming minimal power.
- Line Mode: The inverter is connected to the utility grid, and the load is primarily supplied by the utility.
- Battery Mode: The inverter draws power from the battery to supply the load, typically when utility or solar power is unavailable or insufficient.
- Grid-Tie Operation: The inverter can feed excess solar energy back into the grid, or operate in a hybrid mode using solar, utility, and battery power.
4.6 Battery Equalization Description
Battery equalization is a function added to the charge controller to reverse the buildup of negative chemical effects like stratification and sulfation, which can reduce battery capacity. Equalization helps to remove sulfate crystals from the battery plates, optimizing battery performance.
How to Apply Equalization Function
To use this function, you must enable battery equalization in LCD setting program 30. Then, you can apply it by:
- Setting the equalization interval in program 35.
- Activating equalization immediately in program 36.
When to Equalize
In the float stage, when the set equalization interval is reached, or equalization is activated immediately, the controller will enter the Equalize stage.
This graph illustrates the different stages of battery charging and equalization: Bulk, Absorption, Float, and Equalize, showing how voltage changes during these phases.
Equalize Charging Time and Timeout
During the Equalize stage, the controller charges the battery until it reaches the equalization voltage. Constant-voltage regulation maintains this voltage. The battery remains in this stage until the set equalized time expires. If the battery voltage doesn't reach the equalization voltage within the set time, the charge controller extends the time. If the voltage is still low after the timeout, equalization stops, and the system returns to the float stage.
This graph shows the duration and process of the equalize charging, including the timeout mechanism.
4.7 Fault Reference Code
The inverter provides fault codes to indicate specific issues. Refer to the table below for explanations and recommended actions.
| Fault Code | Fault Event | Icon on |
|---|---|---|
| 01 | Fan is locked when inverter is off. | ERROR |
| 02 | Over temperature | ERROR |
| 03 | Battery voltage is too high | ERROR |
| 04 | Battery voltage is too low | ERROR |
| 05 | Output short circuited or over temperature is detected by internal converter components. | ERROR |
| 06 | Output voltage is too high. | ERROR |
| 07 | Overload time out | ERROR |
| 08 | Bus voltage is too high | ERROR |
| 09 | Bus soft start failed | ERROR |
| 51 | Over current or surge | ERROR |
| 52 | Bus voltage is too low | ERROR |
| 53 | Inverter soft start failed | ERROR |
| 55 | Over DC voltage in AC output | ERROR |
| 57 | Current sensor failed | ERROR |
| 58 | Output voltage is too low | ERROR |
| 59 | PV voltage is over limitation | ERROR |
4.8 Warning Indicator
The inverter provides audible alarms and icon flashes for various warning conditions.
| Warning Code | Warning Event | Audible Alarm | Icon flashing |
|---|---|---|---|
| 01 | Fan is locked when inverter is on. | Beep three times every second | Fan Icon |
| 03 | Battery is over-charged | Beep once every second | Battery Icon |
| 04 | Low battery | Beep once every second | Battery Icon |
| 07 | Overload | Beep once every 0.5 second | Overload Icon |
| 10 | Output power derating | Beep twice every 3 seconds | Output Power Icon |
| 15 | PV energy is low. | Beep twice every 3 seconds | PV Icon |
| E9 | Battery equalization | None | Equalization Icon |
| 6P | Battery is not connected | None | Battery Icon |
5. Maintenance
5.1 Clearance and Maintenance for Anti-Dust Kit
Every inverter comes with an anti-dust kit installed from the factory. This kit helps keep dust out of the inverter, increasing product reliability in harsh environments. The inverter automatically detects this kit and activates an internal thermal sensor to adjust the internal temperature.
Maintenance Steps:
- Loosen the screw in a counterclockwise direction on the top of the inverter.
- Remove the dustproof case and take out the air filter foam.
- Clean the air filter foam and dustproof case. After cleaning, re-assemble the dust-kit back into the inverter.
NOTICE: The anti-dust kit should be cleaned from dust every one month.
6. Specifications
6.1 Line Mode Specifications
| INVERTER MODEL | 3.6KW | 6.2KW |
|---|---|---|
| Input Voltage Waveform | Sinusoidal (utility or generator) | |
| Nominal Input Voltage | 100Vac | |
| Low Loss Voltage | 90Vac±5V (UPS); 90Vac±5V (Appliances) | |
| Low Loss Return Voltage | 95Vac±5V (UPS); 95Vac±5V (Appliances) | |
| High Loss Voltage | 145Vac±5V | |
| High Loss Return Voltage | 140Vac±5V | |
| Max AC Input Voltage | 150Vac | |
| Nominal Input Frequency | 50Hz / 60Hz (Auto detection) | |
| Low Loss Frequency | 40±1Hz | |
| Low Loss Return Frequency | 42±1Hz | |
| High Loss Frequency | 65±1Hz | |
| High Loss Return Frequency | 63±1Hz | |
| Output Short Circuit Protection | Circuit Breaker | |
| Efficiency (Line Mode) | >95% (Rated R load, battery full charged) | |
| Transfer Time | 10ms typical (UPS); 20ms typical (Appliances) | |
This graph illustrates how the output power of the inverter derates when the AC input voltage drops below 100V.
6.2 Inverter Mode Specifications
| INVERTER MODEL | 3.6KW | 6.2KW |
|---|---|---|
| Rated Output Power | 3.6KW | 6.2KW |
| Output Voltage Waveform | Pure Sine Wave | |
| Output Voltage Regulation | 100/105/110/115/120Vac±5% | |
| Output Frequency | 50Hz / 60Hz | |
| Peak Efficiency | 93% | |
| Overload Protection | 3s@≥150%; 5s@101%~150% load | |
| Surge Capacity | 2* rated power for 5 seconds | |
| Nominal DC Input Voltage | 24Vdc | 48Vdc |
| Cold Start Voltage | 23.0Vdc | 46.0Vdc |
| Low DC Warning Voltage | ||
| @ load < 50% | 22.0Vdc | 44.0Vdc |
| @ load ≥ 50% | 21.0Vdc | 42.0Vdc |
| Low DC Warning Return Voltage | ||
| @ load < 50% | 22.5Vdc | 45.0Vdc |
| @ load ≥ 50% | 22.0Vdc | 44.0Vdc |
| Low DC Cut-off Voltage | ||
| @ load < 50% | 20.5Vdc | 41.0Vdc |
| @ load ≥ 50% | 20.0Vdc | 40.0Vdc |
| High DC Recovery Voltage | 32Vdc | 62Vdc |
| High DC Cut-off Voltage | 33Vdc | 63Vdc |
| No Load Power Consumption | 45W | 50W |
6.3 Two Load Output Power
| INVERTER MODEL | 3.6KW | 6.2KW |
|---|---|---|
| Full Load | 3600W | 6200W |
| Maximum Main Load | 3600W | 6200W |
| Maximum Second Load (battery model) | 1200W | 2066W |
| Main Load Cut Off Voltage | 26VDC | 52VDC |
| Main Load Return Voltage | 27VDC | 54VDC |
6.4 Charge Mode Specifications
| Utility Charging Mode | 3.6KW | 6.2KW |
|---|---|---|
| Charging Algorithm | 3-Step | |
| AC Charging Current (Max) | 80Amp (@VI/P=100 Vac) | |
| Bulk Charging Flooded Battery Voltage | 29.2 | 58.4 |
| AGM / Gel Battery | 28.2 | 56.4 |
| Floating Charging Voltage | 27Vdc | 54Vdc |
This graph illustrates the typical 3-step charging process (Bulk, Absorption, Maintenance) for batteries, showing how current and voltage change over time.
| MPPT Solar Charging Mode | ||
|---|---|---|
| INVERTER MODEL | 3.6KW | 6.2KW |
| Max. PV Array Power | 4200W | 6500W |
| Nominal PV Voltage | 240Vdc | 360Vdc |
| PV Array MPPT Voltage Range | 60Vdc~500Vdc | |
| Max. PV Array Open Circuit Voltage | 500Vdc | |
| Max Charging Current (AC charger plus solar charger) | 120Amp | 120Amp |
6.5 Grid-Tie Operation
| INVERTER MODEL | 3.6KW | 6.2KW |
|---|---|---|
| Nominal Output Voltage | 100/105/110/115/120VAC | |
| Feed-in Grid Voltage Range | 90~150VAC | |
| Feed-in Grid Frequency Range | 49~51±1Hz/59~61±1Hz | |
| Nominal Output Current | 30A | 51.7A |
| Power Factor Range | >0.99 | |
| Maximum Conversion Efficiency (DC/AC) | 97% | |
6.6 General Specifications
| INVERTER MODEL | 3.6KW | 6.2KW |
|---|---|---|
| Safety Certification | CE | |
| Operating Temperature Range | -10°C to 50°C | |
| Storage temperature | -15°C~60°C | |
| Humidity | 5% to 95% Relative Humidity (Non-condensing) | |
| Dimension (D*W*H), mm | 110X334X423 | 110X334X423 |
| Net Weight, kg | 9 | 10 |
7. Troubleshooting
This section provides a guide to common problems, their possible causes, and recommended solutions.
| Problem | LCD/LED/Buzzer | Explanation / Possible cause | What to do |
|---|---|---|---|
| Unit shuts down automatically during startup process. | LCD/LEDs and buzzer active for 3 seconds then complete off. | The battery voltage is too low (<1.91V/Cell) | 1. Re-charge battery. 2. Replace battery. |
| No response after power on. | No indication. | 1. The battery voltage is far too low. (<1.4V/Cell) 2. Internal fuse tripped. | 1. Contact repair center for replacing the fuse. 2. Re-charge battery. 3. Replace battery. |
| Input voltage is displayed as 0 on the LCD and green LED is flashing. | Input protector is tripped | Check if AC breaker is tripped and AC wiring is connected well. | |
| Mains exist but the unit works in battery mode. | Green LED is flashing. | Insufficient quality of AC power. (Shore or Generator) | 1. Check if AC wires are too thin and/or too long. 2. Check if generator (if applied) is working well or if input voltage range setting is correct. (UPS Appliance) |
| Green LED is flashing. | Set "Solar First" as the priority of output source. | Change output source priority to Utility first. | |
| When the unit is turned on, internal relay is switched on and off repeatedly. | LCD display and LEDs are flashing | Battery is disconnected. | Check if battery wires are connected well. |
| Fault code 07 | Overload error. The inverter is overload 110% and time is up. | Reduce the connected load by switching off some equipment. | |
| Fault code 05 | Output short circuited. | Check if wiring is connected well and remove abnormal load. | |
| Fault code 02 | Temperature of internal converter component is over 120°C. Internal temperature of inverter component is over 100°C. | Check whether the air flow of the unit is blocked or whether the ambient temperature is too high. | |
| Buzzer beeps continuously and red LED is on. | Battery is over-charged. | Battery is over-charged. | Return to repair center. |
| Fault code 03 | The battery voltage is too high. | Check if spec and quantity of batteries are meet requirements. | |
| Fault code 01 | Fan fault | Replace the fan. | |
| Fault code 06/58 | Output abnormal (Inverter voltage below than 190Vac or is higher than 260Vac) | 1. Reduce the connected load. 2. Return to repair center. | |
| Fault code 08/09/53/57 | Internal components failed. | Return to repair center. | |
| Fault code 51 | Over current or surge. | Restart the unit, if the error happens again, please return to repair center. | |
| Fault code 52 | Bus voltage is too low. | ||
| Fault code 55 | Output voltage is unbalanced. |
8. User Tips
- Startup Sequence: To ensure stable operation, follow the startup sequence: 1. Connect Battery, 2. Connect AC input or PV input, 3. Connect Load.
- Exit Sequence: To properly shut down the system, follow the exit sequence: 1. Disconnect Load, 2. Disconnect AC input or PV input, 3. Turn off the inverter, 4. Disconnect Battery.
- Input Activation: Do not turn on each input (AC, PV) at the same time. It is recommended to allow the inverter to work sufficiently and stably for at least 3 minutes after connecting one input before connecting another.
9. Warranty and Support
For any issues not covered in the troubleshooting section, or for warranty claims, please contact your local dealer or the service center. This manual provides general guidance; specific warranty terms and conditions may vary.
For detailed information and further assistance, please refer to the comprehensive user manual PDF available at: Y&H Hybrid Inverter User Manual (PDF).
