To protect the IntelliFlo pump electronics from damage due to freezing conditions, the pump will switch itself on to generate internal heat when the air temperature drops below 40° F. This feature is not intended to protect the system plumbing from freezing. The pump will run at a lower speed than what you have it set, unless you have programmed the adjustment.
The Intelliflow pumps are great pumps, but come at a disadvantage- A whole lot of electronics.; Since the intelliflow pumps are fairly newer in the market, and you have already had the electronics replaced recently, so I am going to presume that you still are under Pentair Manufacturer warranty.
The issue you are describing remains a problem with the electronics. Since you are not getting any alarm codes, there may be in issue in the wiring or you may have a defective pump. Before calling into the manufacture, lets reset the pump to factory defaults:
The IntelliFlo VS-3050 pump can be reset to the factory default settings. All previously adjusted pump speeds
that were saved will be erased.
To reset the pump to the factory default settings:
1. Ensure that the pump is powered on and the green power LED is on.
2. Press the Stop button to stop the pump.
3. Press and hold all of the four Speed buttons simultaneously for four seconds. Power off the drive
and reenergize. The default settings will be in effect.
If this solves your issues, then you can program the pump to operate at the desired time/speeds.
If you are still having issues, I recommend contacting Pentair Warranty at 800-831-7133. Be sure to have the date of install, the Serial and Model numbers handy when you call.
It sounds like the small valve that releases the pressure out of the main pipe that runs between the compressor and tank is not working once the tank is full and the motor automatically cuts off. You know this valve is working by the sound of a short spurt if air being released when the motor cuts off. Releasing this pressure means that the motor is able to restart easily because there is no load. If the valve is not releasing this air, the compressor is trying to start under full load which the motor is not capable of doing, hence the humming and popping of breakers due to a current overload as the motor tries to start. Motor burnout is possible if it keeps recurring.
This small release valve is attached to the Pressure control switch that switches the motor On & Off and usually has a small pipe going to it or is incorporated inside the Pressure Control Switch. If the valve appears to be working then it means that the Non-return valve on the input to the tank is not sealing properly and letting air back into the main pipe causing the compressor to start under load. Check both valves for correct operation and replace as necessary.
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Please specify whether the 'control panel' incorporates a timer (with a 24 hour cycle) or a thermostat. Your explanation seems to indicate that it should come on every day so I am assuming there is a timer.
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