| Problem | LCD/LED/Buzzer | Explanation | What to do |
| Unit shuts down Automatically during startup process. | LCD/LEDs and buzzer will be active for 3 seconds and 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.Battery polarity is reversed | 1. Check if batteries and the wiring are connected well. 2.Re-charge battery. 3. Replace Video |
| Mains / Utility applied but unit is running off battery power | Input voltage is 0 on the LCD and green LED is flashing. | Input protector is tripped. | Check if AC breaker is tripped and AC wiring is correct. |
| same | Green LED is flashing. | Insufficient quality of AC power. (Shore or Generator) | (Shore or Generator) Check if AC wires are too thin and/or too long. Check if generator (if applied) is working well or if input voltage range setting is correct. (UPS→Appliance) |
| same | Green LED is flashing. | Set “Battery First” or “Solar First” as the priority of output source. | Change output source priority to Utility |
| When unit is turned on, Strange noise or immediate shutdown | LCD display and LEDs are flashing | Battery is improperly connected or BMS issues | Check if battery wires are properly connected, BMS is Reset, Charge Battery |
| Buzzer beeps continuously and red LED is on. | Fault code 01 | Fan fault | Replace the fan. |
| same | Fault code 02 | Internal temperature of component is over 100°C. Check whether the air flow of the unit is blocked or whether the ambient temperature is too high | Check whether the air flow of the unit is blocked or whether the ambient temperature is too hi |
| same | Fault code 03 | Battery is over-charged. | The battery voltage is too high. Mainly caused by BMS not able to charge battery at current rate/ amps or Temperature too low, reduce battery charging amps, and retry |
| same | Fault code 05 | Output short circuited | Check if AC output wiring is correct, and remove all loads (remove abnormal load) |
| same | Fault code 06/58 | Output abnormal (Inverter voltage below than 85Vac or is higher than 130Vac) | 1.Reduce the connected load. (the load may be interact acting with inverter adversely – Motor Load etc) 2. Remove load to see if problem persists 3. Return to repair center |
| same | Fault code 07 | The inverter is overload 110% and time is up. | Reduce the connected load by switching off some equipment |
| same | Fault Code 08 | Battery Voltage rises abnormally fast | 1. Usually caused by BMS disconnect when battery over full while charging 2. Battery Charging Amps/Volts too high for battery/BMS 3. These condition may cause mainboard damage, return for repair |
| same | Fault Code 09/53/57 | Internal Components on Mainboard failure | Change Mainboard (return for repair) |
| same | Fault code 51 | Over current or surge | Unit cannot handle the load being applied. If load is removed and error persists after restart, change mainboard. |
| same | Fault code 52 | Bus Voltage is too Low | Restart Unit, if it occurs immediately , return for repair / Mainboard. Can be caused by a rare set of events such as extreme load while solar/AC power is insufficient |
| same | Fault code 55 | Output voltage is unbalanced | Usually caused by a Diode in the load, e.g. a heatgun on low setting. Load is not equal on both positive and negative cycles on AC power |
| same | Fault code 56 | Battery Connection is bad or BMS has tripped | Insufficient battery power (voltage is dropping too quickly ) under load,or bad battery connection |
| same | Fault code 60 | Power is feeding back into AC Output | Check that you don’t have AC Inputs / Outputs switched with Inputs. Check whether the AC output connected to the grid input. Check whether Program 8 settings are the same for all parallel inverters Check whether the current sharing cables are connected well in the same parallel phases. Check whether all neutral wires of all parallel units are connected together. If problem still exists, contact repair center |
| same | Fault 61 (MPP Solar) | Battery / Inverter BMS comms failure | Battery will not communicate with Inverter , set battery type setting 05 to USE if BMS is incompatible with UNIT. |
| same | Fault 62..69 | Messages from battery | Example, battery is too cold, too full, etc etc, battery qty has changed unexpectedly |
| same | Fault code 80/20 | CAN fault/ BMS comms fault | 1. Check whether the parallel communication cables are connected well. 2. Check whether Program 23 settings are right for the parallel system |
| same | Fault code 81 | Parallel / Split phase Host Loss | 1. Check whether the parallel communication cables are connected well. 2. Check whether Program 23 settings are correct for the parallel system, example a unit is expecting a parallel companion If running as single unit, set 23/28 to SIG (depending on mode) Parallel board failure |
Inverter Fault Codes …Troubleshooting
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