ABNORMAL STATE DISPLAYING DEVICE IN AIR CONDITIONER

• Main Author: MAEKAWA TOSHIO
• Format: Patent
• Language: English
• Published: 20.07.1992
• Subjects: AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING; BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; RANGES; VENTILATING; WEAPONS

PURPOSE:To display a troubled location when a temperature sensor is troubled by a method wherein a temperature measuring circuit for taking temperature data from a plurality of temperature sensors is provided, an upper limit value and a lower limit value having predetermined temperature data are compared with each other. CONSTITUTION:In the event that any one of a room temperature thermistor 9, a blowing temperature thermistor 10, a refrigerant heat exchanger temperature thermistor 11 and a hot water heat exchanger temperature thermistor 12 has a short-circuit or a cutting as a trouble and a temperature can not be measured accurately, this abnormal state is detected by a sensor abnormal state sensing means 22. An abnormal state is transmitted to an air conditioner operation determining means 15, operations of an outdoor device 14 and a boiler 5 are stopped. With such an arrangement, safe state is assured and at the same time an operating LED 19 and a timer LED 20 are lit with an LED displaying order determining means 23 under a different illumination pattern in response to the kind of abnormal states for every specified illumination intervals 41 and the abnormal states are displayed, so that the troubled location can be rapidly judged.