SMA SUNNY CENTRAL 500CP XT / 630CP XT Solar Inverter
29 fault codes documented
Grid voltage is too high (redundant monitoring)
The inverter's redundant monitoring system has detected an overvoltage condition on the utility grid. This indicates that the AC voltage has exceeded acceptable limits, potentially causing damage to the inverter or connected equipment. The inverter will shut down and monitor the grid for 30 seconds before attempting to reconnect.
Grid voltage is too high (standard monitoring)
The inverter's standard monitoring system has detected an overvoltage condition on the utility grid. This indicates that the AC voltage has exceeded acceptable limits, potentially causing damage to the inverter or connected equipment. The inverter will switch to the 'Disturbance' operating state.
Grid voltage is too low (redundant monitoring)
The inverter's redundant monitoring system has detected an undervoltage condition on the utility grid. This indicates that the AC voltage has fallen below acceptable limits. The inverter will shut down and monitor the grid for 30 seconds before attempting to reconnect.
Grid voltage is too low (standard monitoring)
The inverter's standard monitoring system has detected an undervoltage condition on the utility grid. This indicates that the AC voltage has fallen below acceptable limits. The inverter will shut down and monitor the grid for 30 seconds before attempting to reconnect.
Grid frequency change not permitted or synchronization impossible
The inverter has detected an impermissible change in grid frequency or is unable to synchronize with the grid. This can prevent the inverter from feeding power into the utility grid. The inverter will shut down and monitor the grid for 30 seconds before attempting to reconnect.
Insulation monitoring device detected low grounding resistance
The insulation monitoring device has measured a grounding resistance value that is too low. This indicates a potential ground fault within the PV array, which can pose a safety risk and reduce system performance. The inverter will switch to the 'Disturbance' operating state.
GFDI has tripped
The Ground Fault Detection and Interruption (GFDI) device has tripped. This indicates a detected ground fault condition within the PV array. The inverter will switch to the 'Disturbance' operating state.
Insulation monitoring device detected insulation error
The insulation monitoring device has detected an insulation error. If parameter IsoErrIgn is set to 'On', this error is ignored. This indicates a potential safety risk due to compromised insulation in the PV array.
Ground fault on ungrounded terminal of PV array
A ground fault has been detected on the ungrounded terminal of the PV array. This is a critical safety issue and will cause the inverter to stop feeding power until the disturbance is acknowledged and rectified.
Inverter detected insulation error on inverter bridge
The inverter has detected an insulation error directly on its internal inverter bridge. This indicates a serious internal fault within the inverter itself. The inverter will stop feeding power until the disturbance is acknowledged and rectified.
Inverter detected insulation error
The inverter has detected a general insulation error. This indicates a potential safety risk due to compromised insulation.
Remote GFDI detected permanent ground fault
The Remote GFDI (Ground Fault Detection and Interruption) device has detected a permanent ground fault. This indicates a persistent ground fault condition within the PV array that requires immediate attention. The inverter will stop feeding power until the disturbance is acknowledged and rectified.
Ground fault detected by Soft Grounding has been ignored
A ground fault was detected by the Soft Grounding feature but has been ignored, possibly due to system configuration. While ignored, it still indicates a potential issue.
Insulation measuring is being performed
This message indicates that the inverter is currently performing an insulation measurement. This is a normal operational state and not a fault. No corrective action is required.
Insulation fault has occurred and has been fixed
An insulation fault was detected but has since been rectified. This message serves as an informational warning that an insulation event occurred. No further corrective action is required if the fault has truly been fixed.
Leakage current to ground in PV array or RisoCtlWarn threshold reached
A leakage current to ground has been detected in the PV array, or the threshold defined in parameter RisoCtlWarn has been reached. This indicates a potential insulation degradation or grounding issue.
The PV array current is too high
The current from the PV array has exceeded its maximum permissible level. This can indicate an over-dimensioned array or a fault condition leading to excessive current. This will cause the inverter to shut down for 1 minute and reset automatically on day change.
Reverse currents detected in the PV array or DC connection polarity reversed
Reverse currents have been detected in the PV array, or the DC connection polarity is reversed. This is a critical fault that can damage the inverter and PV modules. The inverter will shut down for 30 seconds and wait for acknowledgement.
Maximum number of GFDI switch cycles reached
The Ground Fault Detection and Interruption (GFDI) device has reached its maximum specified number of switching cycles. This indicates that the GFDI is at the end of its operational life. The inverter will shut down for 30 seconds.
Surge arrester is defective or back-up fuse tripped
The surge arrester is defective, or its back-up fuse has tripped. This compromises the inverter's protection against voltage surges. This is a warning that does not affect inverter behavior immediately but requires attention.
Reverse current has occurred in PV array
Reverse current has been detected in the PV array. This condition can damage the PV modules or the inverter. The inverter will shut down for 1 minute and reset automatically on day change.
External active power setpoints are invalid (smaller than 2 mA)
The external active power setpoints received by the inverter are invalid because they are smaller than 2 mA. The inverter will use the last valid value or, after a day change, Pmax. This is a warning that does not affect inverter behavior immediately.
Several digital active power setpoints are available
Multiple digital active power setpoints are being received by the inverter simultaneously. This indicates a conflict in control signals and the inverter cannot determine which setpoint to use. This is a warning that does not affect inverter behavior immediately.
Power factor of the external reactive power setpoint is invalid
The power factor value provided by the external reactive power setpoint is invalid. The inverter cannot correctly regulate reactive power based on this input. This is a warning that does not affect inverter behavior immediately.
External active and reactive power setpoints are invalid
Both the external active and reactive power setpoints provided to the inverter are invalid. The inverter cannot regulate power based on these inputs. This is a warning that does not affect inverter behavior immediately.
Doors have been opened during operation
The inverter's enclosure doors were opened while the unit was in operation. This is a safety concern as it exposes personnel to live components. The inverter will shut down for 30 seconds.
Fast stop has tripped
The fast stop function has been activated, bringing the inverter to an immediate halt. This is typically a safety measure. The inverter will shut down for 30 seconds.
Grid management shutdown
The inverter has been shut down due to a grid management command, likely from the grid operator or a safety system at the grid interconnection point. The inverter will shut down for 30 seconds.
Defective fast stop
The fast stop circuit or component is defective. This indicates a potential safety system malfunction that could prevent the inverter from stopping quickly when required. The inverter will shut down for 30 seconds.