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Macsolar Solar Inverter Fault & Error Messages

Should there be any internal issues with your Macsolar solar inverter this will be detected by the device and cause the Fault light to be displayed permanently. If the red light is on or if there is a green light without the yellow Run light your inverter isn’t working. We recommend you try a reboot of your system as the first .

There are also other faults that may require additional procedures. To make these more accessible, we have put together a list of faults, messages and possible actions from the Macsolar Inverter user’s manual. If you’re not confident in performing the below procedures, we recommend that you contact a local solar accredited electrician to assist you.

Please note: The below user manual instructions at times recommend contacting the Macsolar service line, unfortunately they are out of business so we recommend you contact a local solar accredited electrician instead.

Error No.	Information	Message	Corresponding Action
0	Grid Vtg. Fault	The grid voltage has exceeded the permitted range according to local grid regulations.	Following causes might lead to this error: • Grid voltage is too high or too low at the point of common coupling to the inverter. • Grid impedance at the terminal of the inverter is too high. For safety consideration, the inverter will disconnect itself from the grid for a short period of time, and it will reconnect to the grid automatically after a short period of time if the grid voltage is back to the permitted range.
1	Grid Vtg.10min Fault	The average grid voltage over 10 minutes has been outside the permitted range according to local grid regulations. Following causes might lead to this error: • Grid voltage is too high at the point of common coupling to the inverter. • Grid impedance at the terminal of the inverter is too high. For safety consideration, the inverter will disconnect itself from the grid for a short period of time, and it will reconnect to the grid automatically after a short period of time if the grid voltage is back to the permitted range.	• Check the grid voltage. • Check the grid connection of the inverter. If the grid voltage exceeds the permitted range because of local grid conditions, please ask the utility operator if the voltage can be adjusted at the feed-in point or if changes in the values of the monitored operational possible. If the grid voltage that checked is within the permitted range, yet this error is still showing in the LCD screen, please contact service line.
2	Fac Fault	The grid frequency has left the permitted range. For safety consideration, the inverter will disconnect itself from the grid for a short period of time, and it will reconnect to the grid automatically after a short period of time if the grid frequency is back to the permitted range.	• Within safety scope, check the grid frequency and observe how often major deviations occur. If there are repeated frequency turbulences which lead to this error, please ask the utility operator if modification of the operating parameter is possible. If this error is not solvable, please contact Macsolar Serviceline.
3	Utility Loss	The inverter has detected an error in the cabling and cannot connect to the grid. Following causes might lead to this error: • Grid connection installation failure. • Cabling failure. • Incorrect country setting.	• Check AC installation. • Check grid connection. • Check if the country setting is correct: – Via LCD screen (please refer to chapter 7.2 “Configuration”). – Via the remote communication: setting Parameter “Country”. If this error is not solvable, please contact Macsolar Serviceline.
4	High DC Bus	The voltage of the Bus which paralleling connected with the string is too high. The following causes might lead to this error: • The DC input voltage connected to the inverter is too high. • Sudden DC surge. For safety consideration, the inverter will shutdown itself.	• Please disconnect the inverter from the PV strings (see chapter 6.5 “DC side Disconnection”) or else the inverter might be damaged. • Check the DC voltage of the strings for adherence to the maximum input voltage of the inverter, before you reconnect the inverter to the PV strings.
5	GFCI Fault	The inverter has detected a ground fault in the PV generator.	• The installer of the PV generator must solve the ground faults before you re-connect the strings. If this error is not solvable, please contact Macsolar Serviceline.
6	Over-temperature	The delivered power of the inverter was reduced below rated power because of abnormal temperature within 0.5s. Following causes might lead to this error: • At least one or more of the thermally monitored varistors are defective. • Overheating inside. • Not sufficient ventilation.	If this event occurs often: • Please ensure sufficient ventilation. • Check the varistors. If this error is not solvable, please contact Macsolar Serviceline.
7	Varistor Fault	At least one of the varistors from the DC or AC side is defected. Following causes might lead to this error: • Varistor is bust due to over-voltage protection. Contact Macsolar Serviceline.	If this event occurs: Please check the varistors as per chapter 5.6 “Check Varistors”. If this error is not solvable, please
8	PV-Overvoltage	The DC input voltage which connects to the inverter is too high. Following causes might lead to this error: • The open-circuit voltage of the PV generator is higher than the maximum DC input voltage of the inverter. • Sudden DC surge. • Junction temperature of solar panel too low.	• Please immediately disconnect the inverter from the PV strings (see chapter 6.5 “DC side Disconnection”) or else the inverter might be damaged. Check the DC voltage of the strings for adherence to the maximum input voltage of the inverter, before you reconnect the inverter to the PV strings.
9	Consistence Fault	Following causes might lead to this error: • Interference device	If this event occurs often: Please contact Macsolar Serviceline.
10	Isolation Fault	There is a sudden isolation fault which is detected by the inverter. Normally this fault will only exist for a very short period of time and shall not have any bad influence to the inverter.	If this event occurs often: Please contact Macsolar Serviceline.
11	DC INJ Fault	The direct component of the AC current is out of the permitted range.	If this event occurs often: Please contact Macsolar Serviceline.
12	Device Fault	A fault has occurred in one or more major components of the inverter. For safety consideration, the inverter will shutdown itself.	If this event occurs please contact Macsolar Serviceline.
13	GFCI Device Fault	The internal sensor has detected that the GFCI Device is out of function. For safety consideration, the inverter will shutdown itself.	If this event occurs: Please contact Macsolar Serviceline.
14	Comm. disturbed	A fault has occurred in the internal communication of the inverter. However, the inverter continues feeding into the grid.	If this event occurs often: Please contact Macsolar Serviceline.
15	Current Sensor Fault	A fault has occurred in one or more current sensor of the inverter. For safety consideration, the inverter will shutdown itself.	If this event occurs: Please contact Macsolar Serviceline.
16	CPU Ref 2.5V Fault	The CPU voltage that detected by internal sensor is deviating the pre-set 2.5V reference line.	If this event occurs: Please contact Macsolar Serviceline.
17	EEPROM R/W Fail	Internal device fault. For safety consideration, the inverter will shutdown itself.	If this event occurs: Please contact Macsolar Serviceline.
18	DC INJ Device Fault	A fault has occurred in the sensor which detects the direct component of the AC current.For safety consideration, the inverter will shutdown itself.	If this event occurs: Please contact Macsolar Serviceline.
19	Relay Fault	A fault has occurred in the relay which will automatically disconnect the inverter from the grid. For safety consideration, the inverter will shutdown itself.	If this event occurs: Please contact Macsolar Serviceline.
20	AC-Overcurrent	The detected AC current has exceeded the pre-set Max. AC Current. Following causes might lead to this error: • Short circuit happens in the output circuit.	If this event occurs often: Please contact Macsolar Serviceline.

The full details are available in the Macsolar Inverter manual’s troubleshooting section. In case performing the steps above does not fix the issue and your Macsolar Solar Inverter is still within the warranty period you can contact the equipment installer or supplier.

If your Macsolar Solar Inverter is outside the warranty period we suggest that you contact a professional solar power expert. If you’re in the Gold Coast or Brisbane area contact Gold Coast Power Solutions here and we will be in touch to provide you with further assistance.

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