Outdoor fan and indoor blower controller for heating, ventilation and air conditioning system and method of operation thereof
First Claim
1. An HVAC controller, comprising:
- a processor couplable to at least two refrigerant pressure sensors via separate data paths to receive input signals therefrom and further couplable to a compressor stage and a condenser fan to provide output signals thereto; and
memory coupled to said processor and storing a software program having program instructions capable of causing said processor to command said condenser fan to turn on irrespective of a state of an input signal generated by either of said at least two refrigerant pressure sensors and generate an error message at least partially depending upon whether or not a high pressure shutdown occurs after said processor commands said condenser fan to turn on.
1 Assignment
0 Petitions
Accused Products
Abstract
An HVAC controller, a method of operating an HVAC controller and an HVAC system employing the controller or the method. In one embodiment, the HVAC controller includes: (1) a processor couplable to at least two refrigerant pressure sensors via separate data paths to receive input signals therefrom and further couplable to a compressor stage and a condenser fan to provide output signals thereto, and (2) memory coupled to the processor and storing a software program having program instructions capable of causing the processor to command the compressor stage or the condenser fan to turn on irrespective of a state of an input signal generated by either of the at least two refrigerant pressure sensors, and generate an error message at least partially depending upon whether or not a high pressure shutdown occurs after the processor commands the compressor stage or the fan to turn on.
10 Citations
21 Claims
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1. An HVAC controller, comprising:
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a processor couplable to at least two refrigerant pressure sensors via separate data paths to receive input signals therefrom and further couplable to a compressor stage and a condenser fan to provide output signals thereto; and memory coupled to said processor and storing a software program having program instructions capable of causing said processor to command said condenser fan to turn on irrespective of a state of an input signal generated by either of said at least two refrigerant pressure sensors and generate an error message at least partially depending upon whether or not a high pressure shutdown occurs after said processor commands said condenser fan to turn on. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of operating an HVAC system, comprising:
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commanding a condenser fan to turn on irrespective of a state of an input signal generated by at least two refrigerant pressure sensors associated with said condenser fan; and generating an error message at least partially depending upon whether or not a high pressure shutdown occurs after said commanding. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An HVAC system, comprising:
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an outdoor unit, including; at least two compressor stages, at least two corresponding condenser fans, at least two corresponding refrigerant pressure sensors, at least one condenser coil, and an outside air temperature sensor; an indoor unit, including; at least one evaporator coil, at least one indoor blower, and at least one expansion valve; and an HVAC controller, including; a processor couplable to said at least two refrigerant pressure sensors via separate data paths to receive input signals therefrom and further couplable to said at least two compressor stages and said at least two condenser fans to provide output signals thereto, and memory coupled to said processor and storing a software program having instructions capable of causing said processor to command one of said at least two condenser fans to turn on irrespective of a state of an input signal generated by either of said at least two refrigerant pressure sensors and generating an error message at least partially depending upon whether or not a high pressure shutdown occurs after said processor commands said one of said at least two condenser fans to turn on. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification