Electrolux KSV26HRC Diagnostic Manual page 17

Communication Fault Continues:
# Disconnect the supply power & check the continuity of the COM-U wire from the following points:
COM-U terminal point on the indoor PCB.
To the communication terminal points on the indoor terminal block.
To the communication terminal points on the outdoor terminal block.
To the COM-U terminal point on the outdoor PCB.
Note: When checking the continuity between the indoor terminal block & the outdoor terminal block,
disconnect the COM-U & Active wires on the indoor terminal block, and then attach them together. This
will create a circuit that can then be tested between the COM-U & Active terminal points on the outdoor
terminal block.
COM-U terminal point on indoor PCB.
Communication terminal points on outdoor
terminal block.
Communication terminal points on
indoor terminal block.
COM-U terminal point on outdoor main PCB.
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