A current sensor fault means the inverter has found one of its internal current sensors to be defective or abnormal. The sensor at fault may be an AC or DC current sensor, the sensor on the arc detector, the RCMU sensor, or the sensor that measures leakage or ground fault current. The inverter usually disconnects from the grid or stops feeding current into it. A related fault code reports a failed sensor offset calibration or a calibration timeout, which briefly interrupts feed-in. To confirm the fault, read the fault code on the inverter display, for example Protect0100 for a leakage current sensor fault. First restart the inverter: switch both the AC and DC switches off, wait one minute for stored energy to discharge, then switch them back on. If the fault does not clear, replace the filter board, the current sensor or the whole inverter, depending on the model's instructions. If the code keeps returning, contact the installer or the manufacturer's service team.
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affectsc1 verified · fact Current sensor
tbl=16.r9 h=7c86a47ed822tbl=13.r11 h=92dfee4f30a5tbl=14.r14 h=5570c77a0245tbl=38.r3 h=179e16e05f1atbl=53.r7 h=28449a15fb93verified by: review-workflowverified on: 2026-10-23
c2 verified · fact Arc fault detection board
The current sensor of the arc detector is reported as defective.
tbl=16.r9 h=7c86a47ed822tbl=13.r11 h=92dfee4f30a5verified by: review-workflowverified on: 2026-10-23
c3 verified · fact Ground fault detection circuit
The RCMU sensor is reported as faulty.
tbl=17.r33 h=3844599424a2tbl=15.r35 h=520bba37bd00tbl=54.r5 h=3a24d42b49b5verified by: review-workflowverified on: 2026-10-23
presents_asc5 verified · fact Inverter shutdown
The inverter disconnects from the grid or stops feeding current.
tbl=16.r9 h=7c86a47ed822tbl=17.r33 h=3844599424a2tbl=13.r11 h=92dfee4f30a5tbl=15.r35 h=520bba37bd00verified by: review-workflowverified on: 2026-10-23
c6 drafted · lead Current sensor offset
Reported as a failed current sensor offset calibration.
tbl=38.r3 h=179e16e05f1ac7 verified · fact Current sensor calibration timeout
Feed-in is briefly interrupted and the inverter goes back to the startup phase.
tbl=14.r13 h=c13abd994ee5verified by: review-workflowverified on: 2026-10-23
detected_byc8 verified · fact Inverter display check
A leakage current sensor fault is shown on the LCD as Protect0100.
tbl=53.r1 h=20878cf5cc23verified by: review-workflowverified on: 2026-10-23
mitigated_byc9 verified · fact Inverter restart
Switch both the AC and DC switches off, wait 1 minute so stored energy can discharge, then switch them back on.
tbl=37.r3 h=6c5eaca7f93ctbl=54.r5 h=3a24d42b49b5tbl=34.r6 h=a24a0da56dc8tbl=42.r6 h=3d032117a152verified by: review-workflowverified on: 2026-10-23
c10 verified · fact Filter board replacement
Applies when a restart does not clear the leakage current sensor fault.
tbl=37.r3 h=6c5eaca7f93cverified by: review-workflowverified on: 2026-10-23
c11 drafted · lead Inverter replacement
Applies when a restart does not clear the fault.
tbl=37.r3 h=6c5eaca7f93ctbl=34.r6 h=a24a0da56dc8tbl=42.r6 h=3d032117a152c12 drafted · lead Current sensor replacement
The manufacturer provides instructions for replacing the AC current sensor.
sec=h187 h=bcb5d1bfef6freview note: support check: partial - u33 is only a fragment, 'for AC Current Sensor Replacement', which suggests replacement instructions but doesn't say the manufacturer provides them.; review: partial - The passage is only the fragment 'for AC Current Sensor Replacement', which suggests replacement instructions exist but does not clearly say the manufacturer provides them.
c13 verified · fact Contact manufacturer service
Applies when the code persists.
tbl=16.r9 h=7c86a47ed822tbl=54.r5 h=3a24d42b49b5tbl=53.r7 h=28449a15fb93verified by: review-workflowverified on: 2026-10-23
c14 drafted · lead Contact system installer
Applies when the status code keeps recurring.
tbl=17.r33 h=3844599424a2indicates c4indicates c4indicates c4indicates c5indicates c5indicates c2indicates c2indicates c2indicates c2indicates c2indicates c3indicates c4indicates c3indicates c3indicates c3indicates c3indicates c2