We have seen several issues with a C-series and/or Mini VRF experiencing E320 ( OLP Compressor Top Sensor). More than likely the issue is related to a cracked solder joint on the Main PCB. This is caused by the wiring harness having too much tension and damaging the joint by vibration.. Please refer to the attached document for troubleshooting the E320. There have been manufacturing improvements for replacement boards that can withstand the strong tension of the wiring harness of the sensor. Even with a new replacement board, it is recommended to route the harness differently giving some slack that would prevent tension (See attached steps for routing).
Document Identifier: DOC-153717
Document Identifier: 153717
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