I'm working on a clients Prestige 550S. The client complained that the Severse Polarity lights came on for the two shore circuits after connecting to shore power in Canada. Upon returning to the US they connected to the shore power st their dock and the Reverse Polarity indicators were still illuminated. They also noted that the AC Chillers were not working properly.
The shore power cable is a 50amp cable and is connected to two 30amp circuits with a marinco Reverse Y adapter. I know that the Reverse Y will not allow power to the ship if it detects reverse polarity and the indicators remain lit with the shop connected to our heated storage power source where I know for sure that Polarity is not reversed.
I have been through the wiring of the ship with a fine tooth comb and cannot find any issues with the power. I have tested every 110v outlet with a Polarity tested as well as a multi meter and all are good. I don't believe there is a true Polarity in 240v outlets but testing of those outlets shows proper voltages regardless.
One thing I have noted is that there is continuity between the generators hot and the ground circuit. I disconnected the generator from the system to rule that out as a possible cause of this problem.
If I break the ground between the breakers and the shore power and insert a multi meter into the circuit, I am seeing approximately .5v on the 110v circuit and 60v on the 240v circuit.
I should also note that there were electrical storms in the area when this issue first arose. My initial thought was a component was damaged by the storm but I can find no evidence of that. Even with all ship breakers turned to the off position the lights remain illuminated.
I am at a total loss and any advice would be appreciated. I'm also confused why the reverse Polarity indicators have capacitors rather than resistors but I don't typically deal with small circuitry so maybe that is correct.
The shore power cable is a 50amp cable and is connected to two 30amp circuits with a marinco Reverse Y adapter. I know that the Reverse Y will not allow power to the ship if it detects reverse polarity and the indicators remain lit with the shop connected to our heated storage power source where I know for sure that Polarity is not reversed.
I have been through the wiring of the ship with a fine tooth comb and cannot find any issues with the power. I have tested every 110v outlet with a Polarity tested as well as a multi meter and all are good. I don't believe there is a true Polarity in 240v outlets but testing of those outlets shows proper voltages regardless.
One thing I have noted is that there is continuity between the generators hot and the ground circuit. I disconnected the generator from the system to rule that out as a possible cause of this problem.
If I break the ground between the breakers and the shore power and insert a multi meter into the circuit, I am seeing approximately .5v on the 110v circuit and 60v on the 240v circuit.
I should also note that there were electrical storms in the area when this issue first arose. My initial thought was a component was damaged by the storm but I can find no evidence of that. Even with all ship breakers turned to the off position the lights remain illuminated.
I am at a total loss and any advice would be appreciated. I'm also confused why the reverse Polarity indicators have capacitors rather than resistors but I don't typically deal with small circuitry so maybe that is correct.