Diagnostic system for heat pump
First Claim
1. A diagnostic system for use with environmental control apparatus including a heat pump having electro-mechanical units, a thermostat, and a logic module having a first set of electrical contacts coupled over interconnecting wiring both to the thermostat and the electro-mechanical units, which diagnostic system comprises:
- electrical interconnection means, constructed for coupling between said first set of electrical contacts and said interconnecting wiring, and a plurality of indicator lamps coupled to said interconnection means, illumination of the lamps indicating the status of the thermostat and the interconnecting wiring between the thermostat and the logic module.
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Accused Products
Abstract
A diagnostic system is provided for apparatus including a heat pump, a thermostat and a logic module intercoupled to regulate operation of the heat pump electro-mechanical units. The normal control and operating circuits for the heat pump are completed over a wiring harness plugged into an electrical connector on the logic module, which also receives a plurality of sensor information inputs. To check the system, the diagnostic system has a first cable terminating in an interconnector, inserted between the electrical connector on the module and the harness plug. The sensor inputs are disconnected, and additional connectors, carried in a second cable of the diagnostic system, are coupled to the sensor input connections on the logic module. When thus connected, the diagnostic system monitors operation of the thermostat, even though the module is removed at a considerable distance from the thermostat, and also actuates the heat pump units to check their operation. An ohmmeter is included in the diagnostic system, to measure the resistance of the various sensors, and provide an indication of the temperature at a given sensor location. With this diagnostic system, the thermostat, logic module and heat pump units are all rapidly checked from a single location.
137 Citations
15 Claims
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1. A diagnostic system for use with environmental control apparatus including a heat pump having electro-mechanical units, a thermostat, and a logic module having a first set of electrical contacts coupled over interconnecting wiring both to the thermostat and the electro-mechanical units, which diagnostic system comprises:
electrical interconnection means, constructed for coupling between said first set of electrical contacts and said interconnecting wiring, and a plurality of indicator lamps coupled to said interconnection means, illumination of the lamps indicating the status of the thermostat and the interconnecting wiring between the thermostat and the logic module. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An analyzer for use with a heat pump system having electro-mechanical units including a compressor controlled by a compressor relay, a reversing valve and an outdoor coil fan motor both controlled by a defrost relay, and at least a first electric heat unit, a thermostat, and a logic module having a first set of electrical contacts terminating in a receptacle which is coupled over a first cable to the thermostat, to both relays and to the electric heat unit, which analyzer comprises:
an electrical connector, constructed for insertion between the receptacle and the first cable, and a plurality of indicator lamps coupled to said connector, illumination of the lamps indicating the status of the thermostat and the interconnecting wiring between the thermostat, logic module, relays and heat unit. - View Dependent Claims (10, 11, 12, 13, 14, 15)
Specification