SO 469 AC electrical mystery
Aug 16, 2019 17:44:08 GMT
Post by neworca1 on Aug 16, 2019 17:44:08 GMT
The Scheiber panel on our 2015 SO 469 has 4 switches in the left-hand, AC section: Water heater, Battery Charger, AC Plugs 1, AC Plugs 2. The AC Plugs 1 switch is wired to all 6 domestic AC outlets: Fwd Cabin, Nav Table (with GFI), Galley, Microwave, and stbd and port aft cabins. The AC Plug 2 switch did not service anything, so I used it to power a TV monitor. Everything seemed to work just fine while connected to shore power. Flipping the switches off cut the power to the above defined places.
However, when disconnected from shore power with the inverter switched on:
1. The Water Heater and Battery Charger are always OFF, regardless of switch position. This is expected and desired.
2. The AC outlets are ALWAYS ON, regardless of AC Plugs 1 switch position! This was unexpected and undesired!
3. The power to the TV is ALWAYS OFF, regardless of AC Plugs 2 switch position. Very unexpected!
Again, the above behaviors only happen when using the inverter to provide AC. With shore power the switches work as expected.
The frustratingly opaque Jeanneau electrical documentation seems to shed no light on this. I'm hoping someone else has solved the mystery!
After writing the above I did find one more circuit diagram, stuck in the Owners Manual (8.3.2 Layout diagram in my pdf version) rather than with all the other electrical schematics. This teases at an answer, but doesn't show how the switch behavior changes when source of AC is inverter vs shore. And nowhere could I find a legend defining all the A## device labels. The schematics show two AC sources coming into the Scheiber panel, while the "layout diagram" shows only one...
Upon a closer reading of my owners manual I found page describing the DC/AC converter where it clearly states: "Simply cutting the AC power supply at the switch panel does not cut the AC power supply to the cabins: it is also necessary to disconnect the DC supply." This seems to verify that #2 above is as designed (but to me still undesired). So I'm making progress. Mystery #3 is probably because the cable that I used for the TV, PAC4--like cables CE and CH1 for the water heater and battery chargers, respectively--receives power only from shore (or generator), never the inverter. This is not apparent from the schematic, and I still don't know which device performs the automatic switch-over from shore power to inverter power (or to no power).
However, when disconnected from shore power with the inverter switched on:
1. The Water Heater and Battery Charger are always OFF, regardless of switch position. This is expected and desired.
2. The AC outlets are ALWAYS ON, regardless of AC Plugs 1 switch position! This was unexpected and undesired!
3. The power to the TV is ALWAYS OFF, regardless of AC Plugs 2 switch position. Very unexpected!
Again, the above behaviors only happen when using the inverter to provide AC. With shore power the switches work as expected.
The frustratingly opaque Jeanneau electrical documentation seems to shed no light on this. I'm hoping someone else has solved the mystery!
After writing the above I did find one more circuit diagram, stuck in the Owners Manual (8.3.2 Layout diagram in my pdf version) rather than with all the other electrical schematics. This teases at an answer, but doesn't show how the switch behavior changes when source of AC is inverter vs shore. And nowhere could I find a legend defining all the A## device labels. The schematics show two AC sources coming into the Scheiber panel, while the "layout diagram" shows only one...
Upon a closer reading of my owners manual I found page describing the DC/AC converter where it clearly states: "Simply cutting the AC power supply at the switch panel does not cut the AC power supply to the cabins: it is also necessary to disconnect the DC supply." This seems to verify that #2 above is as designed (but to me still undesired). So I'm making progress. Mystery #3 is probably because the cable that I used for the TV, PAC4--like cables CE and CH1 for the water heater and battery chargers, respectively--receives power only from shore (or generator), never the inverter. This is not apparent from the schematic, and I still don't know which device performs the automatic switch-over from shore power to inverter power (or to no power).
