Faulty Sunny Roo Solar Power Inverter Error CodesHere 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.

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Sunny Roo Solar Inverter Error Codes and Descriptions

LCD IndicateDesignationDescriptionRepair
Er00DC_BUS pre-Charge failThe inverter is in soft start procedure, but the DC Bus cannot reach and maintain anticipative charging voltage1. 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
Er03INVERTER voltage
abnormal		The inverter output
voltage is abnormal
Er07DC_BUS over-voltageThe DC BUS inside is lower or higher than expected
Er08DC_BUS under-voltage
Er17EEPROM ERROR on the control boardEEPROM data is wrong
Er19DC_BUS discharge failCapacitors of the DC Bus can’t be discharged down
Er22Output relay fail
More info on Er-22		The Sunny Roo inverter output relay is abnormal
Er24Output current sense failThe inverter output current fails to detect
Er25BOOSTER_A over-currentOver current on the DC side. This fault code is displayed if the current in the DC network is larger than specified.
Er26BOOSTER_B over-current
Er30Rating setting of driver board does not match EEROM of control boardEEPROM data is wrong
Er06EPOInverter 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.
Er09Inverter output over-currentOver-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.
Er11Inverter over-loadOverload on the AC side. This fault code is displayed if the load on the AC network is larger than specified.
Er13INVERTER short circuitShort circuit on the AC side
Er14INVERTER PLL failThe phase of inverter can’t synchronise with the utility.
Er29INVERTER output DC current over spec.The DC component of the electricity fed into the grid is longer than permissible range.
Er10Inverter over temperatureThe 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.
Er18Heat sink over temperatureThe 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.

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Sunny Roo Solar Inverter fault alarm codes and descriptions

LCD IndicateDesignationDescriptionRepair
AL00Utility voltage over-voltageUtility voltage greater or smaller than the permissible value1. 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.
AL01Utility voltage under-voltage
AL02Utility voltage over-frequencyUtility frequency greater or smaller than the permissible value.
AL03Utility voltage under-frequency
AL04BOOSTER_A Input over-voltageOver or under voltage at DC input1. 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.
AL05BOOSTER_A Input under-voltage
AL06BOOSTER_B Input over-voltage
AL07BOOSTER_B Input under-voltage
AL08Anti-IslandingNo utility or utility fail1. 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.
AL09Inverter voltage unbalanceInverter voltage waveform is unbalanced1. 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.
AL10GFDILeakage 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.
AL11Isolation FaultThe 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.
AL13Phase or utility failNo utility or utility fail1. 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.
AL14Waveform of utility fail
More info on AL14

Sunny Roo inverter error codes are a common problem and as the Sunny Roo company is no longer around they don't have any warranty. The Sunny Roo inverter had an AL14 error codePlease 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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