smkettner
Well-known member
Are the pumps running?
If fluid is boiling and pump is running then all piping or tubing should be very hot (240 to 270F?) to the touch all the way to the radiator and the radiator fan (I assume it has one) should be running.starry said:I am not aware of any indicators for pump activity. I can only go by what I can feel and hear.
To quote myself: "I do hear pump motor noise as a faint hum." I feel fluid moving through the pressurized tubes. I cannot feel any vibration on the front pump, and the pump for the rear inverter/charger is not available for inspection, as far as I know.
This was the same as my experience on Friday when I did a 6 hour L1 charge. My fluid noise was definitely only coming from the pump though right underneath the HV coolant reservoir.garygid said:I am doing a 16-hour L1 charge (from 25% SOC) to test a "normal" non-Updated "B" car's L1 charging behavior (with no extension cord, so the 120v supply will not be "too low" as it might be with a long, light-duty extension cord):
Observing the car at 6:15 (just after driving, parking, and starting to charge), 8:15, 10:20, 11:30, 2:20, 6:15 ...
All is well: The Heater reservoir is cold, the HV coolant reservoir is SLIGHTLY warm, the only sound is a "fluid pump" sound, fluid is flowing through the rubber hose just behind the upper edge of the radiator. No gurgle, burp, or bubble sounds of any kind.
Exactly.smkettner said:If fluid is boiling and pump is running then all piping or tubing should be very hot (240 to 270F?) to the touch all the way to the radiator and the radiator fan (I assume it has one) should be running.starry said:I am not aware of any indicators for pump activity. I can only go by what I can feel and hear.
To quote myself: "I do hear pump motor noise as a faint hum." I feel fluid moving through the pressurized tubes. I cannot feel any vibration on the front pump, and the pump for the rear inverter/charger is not available for inspection, as far as I know.
You don't suppose there's a heater in there, for wintertime operation? If so, it sounds like it is stuck on.garygid said:The HV cooling (of the inverter, motor, and charger) is not the source of the excess heat. The Heater coolant Reservoir is what heats up during charging, either L1 or L2.
IBELEAF said:Just a thought, but maybe that's why Nissan recommends L2 charging over L1...
garygid said:Problem:
Heater coolant gradually gets very hot while charging.
Normal:
Heater coolant stays at ambient temperature, no heating.
Variations:
L1 vs L2 makes no real difference.
Something is heating the Heater coolant, eventually too hot to touch.
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