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US 11,781,752 B2Granted
Using diode rectification to determine igniter, inducer relay, and igniter relay faults
AssigneeCopeland Comfort Control LP
InventorHarshal Manik Pawar
Life of this patent
Estimating the term…
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AssigneeCopeland Comfort Control LP
InventorHarshal Manik Pawar
Estimating the term…
Exemplary embodiments are disclosed of controls including circuit assemblies configured for determining igniter, inducer relay, and igniter relay faults. In exemplary embodiments, a control for a system includes an input configured to receive a control signal, an inducer relay, an igniter relay, and a circuit assembly. The circuit assembly is configured to be coupled to the inducer relay, the igniter relay, and an igniter of the system. The circuit assembly comprises a plurality of diodes and is configured to enable detection of and distinguishing between a failure of the igniter, a failure of the inducer relay, and a failure of the igniter relay as determined by a waveform of the control signal at the input of the control for a given one of a plurality of operational states of the control.
A control for a system, the control comprising:
A control for an HVAC system, the control comprising:
A method of determining inducer relay, igniter relay, and igniter failures of a control for a system, the control including an input, an inducer relay, an igniter relay, and a circuit assembly comprising a plurality of diodes and configured to be coupled to the inducer relay, the igniter relay, and an igniter of system, the method comprising using diode rectification to detect and distinguish between a failure of an igniter of the system, a failure of the inducer relay, and a failure of the igniter relay by determining whether a waveform of a control signal at the input of the control is a full cycle waveform, a positive half cycle waveform, or a negative half cycle waveform for a given one of a plurality of operational states of the control including an idle state, a pre-purge state, and an igniter warm-up state.
Dependencies are inferred from the claim text.