Difference between revisions of "110v charging system (task)"

Revision as of 09:34, 27 February 2008

Under the port side bench in the main cabin (forward of the nav station, aft of the freshwater tank) is a unit that appears to be a battery charger for when the boat is hooked to shore power.

Ted disconnected it from the 12v system when he repaired the alternator. [This means that the circuit within the 110V charger (converter) unit that inhibits it from charging the batteries while the engine is running has been disconnected at the engine end -- the "blue-wire" signal wire that tells the converter that the engine is running, hence expected to be being charged by the engine's alternator. Note that the connections which carry the charging current from the converter to the batteries was never removed.]

Someone needs to:

1. look through the manual to see how it works
   1. DONE: reported in 120-V AC Battery Charger|Systems list
   2. TODO: another person should review the c.Oct07-Feb08 work in this section.
2. verify how it should be connected to the 12v system
   1. DONE: see above reference. It (the "blue wire") connects to the down-stream side of the fuel-pressure switch (see item 11's right-side contactor in the [Engine schematic dgm].)
3. verify that it is properly connected to the 110v system (i.e., the charging function, NOT the "blue-wire" charge inhibiting function.
   1. DONE: I.e., the 110v -to- 12v charging circuit works [Ship's log c. Nov07-Jan08]
4. TODO: test the "blue-wire" charging inhibition circuit:
   1. connect shore power and charge the batteries with the converter
   2. momentarily connect the "blue wire" at the engine end to any 12V "+" source
   3. observe (we expect) that the converter desists charging of the batteries; note that by a drop in voltage from c. 13.x volts to 12.x volts.
   4. TODO: now we can connect the "blue wire" charge-inhibition signal as mentioned above
   5. power it up to see that it works
      1. hook up shore power, turn on the inverter, and observe batteries charging, especially leave one battery OFF at the main battery switch but see that it is indeed charging.
      2. start the engine, and observe that the battery that is NOT turned ON isn't being charged any more; i.e., we assume that if this battery isn't being charged by the 110v inverter, then even the batteries which ARE still being charged are being charged by the engine.
   6. if above steps seems to work, re-connect it to the 12v system
   7. verify that the 110V converter charges the batteries properly, and inhibits charging when engine is running
5. document how to use it (the 110V shore power charging subsystem) for future reference.

NOTE: See [12-V Schem walk-thru sect 4] for description of connection to 12-V DC battery circuits for charging. The discussion there, along with the 12-V primary power schematic, answer to the "look thru the manual" and "verify how it should be connected" action items above.

NOTE: See 120-V AC Battery Charger entry in the Systems List for high-level writeup of the charger [ThomS quick study c.Sep07]