Here at Gold Coast Solar Power Solutions we are constantly being contacted by people who have had a solar power system installed by other companies with a Sunny Roo solar inverter installed. They have recently checked the Sunny Roo inverter to only find it is displaying an error code or fault code. We are often asked what these fault codes mean so here is a list to explain the different Sunny Roo inverter error codes.
Sunny Roo Solar Inverter Error Codes and Descriptions
| LCD Indicate | Designation | Description | Repair |
| Er00 | DC_BUS pre-Charge fail | The inverter is in soft start procedure, but the DC Bus cannot reach and maintain anticipative charging voltage | 1. Disconnet ALL PV (+) or PV (-) 2.Wait for a few seconds 3. After the LCD switches off, reconnect and check again 4. If error code keeps recurring, contact your local distributor |
| Er03 | INVERTER voltage abnormal |
The inverter output voltage is abnormal |
|
| Er07 | DC_BUS over-voltage | The DC BUS inside is lower or higher than expected | |
| Er08 | DC_BUS under-voltage | ||
| Er17 | EEPROM ERROR on the control board | EEPROM data is wrong | |
| Er19 | DC_BUS discharge fail | Capacitors of the DC Bus can’t be discharged down | |
| Er22 | Output relay fail | The Sunny Roo inverter output relay is abnormal | |
| Er24 | Output current sense fail | The inverter output current fails to detect | |
| Er25 | BOOSTER_A over-current | Over current on the DC side. This fault code is displayed if the current in the DC network is larger than specified. | |
| Er26 | BOOSTER_B over-current | ||
| Er30 | Rating setting of driver board does not match EEROM of control board | EEPROM data is wrong | |
| Er06 | EPO | Inverter enters into EPO mode (Emerge Power Off) | 1. Remove the short circuit occurred at the EPO terminal 2. If error code keeps recurring, contact your local distributor. |
| Er09 | Inverter output over-current | Over-current on the AC side. This fault code is displayed if the current in the AC network is larger than specified. | 1. Turn off AC breaker, then check the peripheral AC system configuration and the grid connections. 2. If error code keeps recurring, contact your local distributor. |
| Er11 | Inverter over-load | Overload on the AC side. This fault code is displayed if the load on the AC network is larger than specified. | |
| Er13 | INVERTER short circuit | Short circuit on the AC side | |
| Er14 | INVERTER PLL fail | The phase of inverter can’t synchronise with the utility. | |
| Er29 | INVERTER output DC current over spec. | The DC component of the electricity fed into the grid is longer than permissible range. | |
| Er10 | Inverter over temperature | The internal temperature is too high. | 1. Try to reduce the ambient temperature. 2. Move the inverter to a cooler place. 3. If error code keeps recurring, contact your local distributor. |
| Er18 | Heat sink over temperature | The heat sink temperature is too high. |
Please be aware that the table above is a copy of the Sunny Roo solar inverter error codes table from the manual. The action it recommends if the error code does not clear is to contact your local distributor. Unfortunately the distributor, Beyond Building and Sunny Roo Products are no longer trading so if you are on the Gold Coast or in Brisbane please contact Gold Coast Solar Power Solutions here. If you are not located in Brisbane or on the Gold Coast we recommend contacting your local solar power specialists.
Sunny Roo Solar Inverter fault alarm codes and descriptions
| LCD Indicate | Designation | Description | Repair |
| AL00 | Utility voltage over-voltage | Utility voltage greater or smaller than the permissible value | 1. Wait for 1 minute, if the grid returns to normal, the Sunny Roo inverter automatically restarts. 2. Check grid connection, such as wires and connectors 3. Make sure grid voltage and frequency meet the proper specifications. 4. If error code keeps recurring, contact your local distributor for help. |
| AL01 | Utility voltage under-voltage | ||
| AL02 | Utility voltage over-frequency | Utility frequency greater or smaller than the permissible value. | |
| AL03 | Utility voltage under-frequency | ||
| AL04 | BOOSTER_A Input over-voltage | Over or under voltage at DC input | 1. Disconnect ALL PV (+) or PV (-). 2. Check the open PV voltage is outside the 120Vdc ~ 500Vdc 3. If PV voltage is normal and the problem still occurs, contact your local distributor for help. |
| AL05 | BOOSTER_A Input under-voltage | ||
| AL06 | BOOSTER_B Input over-voltage | ||
| AL07 | BOOSTER_B Input under-voltage | ||
| AL08 | Anti-Islanding | No utility or utility fail | 1. Disconnect ALL PV (+) or PV (-). 2. Check grid connection, such as wires and connectors. 3. Check grid usability. 4. If utility is normal and the error code keeps recurring, contact your local distributor for help. |
| AL13 | Phase or utility fail | ||
| AL14 | Waveform of utility fail | ||
| AL09 | Inverter voltage unbalance | Inverter voltage waveform is unbalanced | 1. Shutdown inverter (unplug PV generator from the input). 2. Check grid usability and restart the inverter (plug PV generator back into input). 3. If error code keeps recurring, contact your local distributor for help. |
| AL10 | GFDI | Leakage current on ground conductor is too high. | 1. Unplug PV generator from the input, check AC peripheral system. 2. After the problem is cleared, re-plug the PV. Check the PV-inverter status. 3. If error code keeps recurring, contact your local distributor for help. |
| AL11 | Isolation Fault | The impedence is between PV (+) & PV (-) and ground is lower than 2M Ohm. | 1. Disconnect ALL PV (+) or PV (-). 2. Check the impedence between PV (+) & PV (-) and ground. The impedence must be larger than 2M Ohm. 3. If error code keeps recurring, contact your local distributor for help. |
Please be aware that the table above is a copy of the Sunny Roo solar inverter fault codes table from the manual. The action it recommends if the fault code does not clear is to contact your local distributor. Unfortunately the distributor, Beyond Building and Sunny Roo Products are no longer trading so if you are on the Gold Coast or in Brisbane please contact Gold Coast Solar Power Solutions here. If you are not located in Brisbane or on the Gold Coast we recommend contacting your local solar power specialists.
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