This fault is an internal ribbon cable or plug connector that is not fully seated or is out of line with its mating connector inside an inverter or surge protector. On a surge protector, it can show as one phase with neither the green nor the red status LED lit. On an inverter, the user interface may not show instantaneous values properly, or may show no data or communication. Disconnect the unit from all voltage sources and wait. Confirm there is no voltage at the AC and DC terminals, then open it and check that the ribbon cables are fully seated. Make sure each cable is lined up with its connector and pushed fully home. Remove and reseat it if needed. When reconnecting, confirm the lock hooks close or click into place, and keep the cable from being pinched under assemblies or the lid. Before unlocking a ribbon plug, check which way its locking tabs press. Pushing them the wrong way can break the tabs and damage the cable.
affectsc1 drafted · lead Internal communication cable
Flat ribbon cables between internal boards, e.g. the BFS board in an inverter or the display connection in a surge protector.
tbl=7.r11 h=175517297533sec=h1 h=deec4a068bd5c2 drafted · lead Communication interface module
Ribbon cables run between the communication board and other internal assemblies.
sec=h1 h=deec4a068bd5sec=h52 h=94e749ab7b25c3 drafted · lead Surge protection device
tbl=7.r11 h=175517297533presents_asc4 drafted · lead SPD status LED off proposed
On one phase of the SPD, neither the green LED nor the red LED is lit.
tbl=7.r11 h=175517297533c5 drafted · lead Communication loss
The inverter user interface does not show instantaneous values properly, or shows no data or communication.
sec=h1 h=deec4a068bd5caused_byc6 drafted · lead Installation error
The ribbon cable is not fully connected or is out of line with its connector.
tbl=7.r11 h=175517297533review note: support check: partial - u2 gives the cause as the cable not connected properly or misaligned, but nothing calls it an installation error.
detected_byc7 drafted · lead Visual inspection
With the unit de-energized, check that each ribbon cable is lined up with its connector and fully seated.
tbl=7.r11 h=175517297533sec=h1 h=deec4a068bd5mitigated_byc8 drafted · lead Ribbon cable reseating proposed
Take the cable out and plug it back in if it is not fully seated.
tbl=7.r11 h=175517297533sec=h1 h=deec4a068bd5c9 drafted · lead Connector latch verification proposed
After inserting the plug, confirm the lock hooks have closed or snapped audibly into place, and make sure the cable is not pinched under an assembly or the lid.
sec=h52 h=94e749ab7b25sec=h1 h=c764e3f4f4b1c10 drafted · lead Correct connector latch release proposed
Before unlocking a ribbon plug, check which way its locking tabs press. Pushing them the wrong way can break the tabs and damage the cable.
sec=h59 h=cab32f399742sec=h63 h=1534eb8bea4dsec=h60 h=1534eb8bea4dreview note: support check: partial - Passages warn about breaking tabs by pressing them the wrong way, but do not link this to mitigating an unseated connector.
caused_by c6