Air-conditioning appratus having plurality of indoor units conne

Details Air-conditioning appratus having plurality of indoor units conne Air-conditioning appratus having plurality of indoor units conne

1993-06-30

1994-06-28

Tanner, Harry B.

Refrigeration

With indicator or tester

Condition sensing

62160, 62197, 621963, F25B 4900

Patent

active

053236173

ABSTRACT:
According to this invention, a plurality of indoor units each having an indoor heat exchanger are connected to a heat source unit having a compressor and a water heat exchangers, thereby constituting a multi-type air-conditioning apparatus. The heat source unit has an operation switch operated when a refrigerant amount is to be checked. When the operation switch is turned on, the refrigerant discharged from the compressor is circulated in only the heat source unit. At this time, the temperature of predetermined positions in the heat source unit is detected by a temperature sensor, and it is determined, in accordance with the detection temperature, whether the refrigerant amount in a refrigerating cycle is normal or abnormal. The determination result is displayed on a display unit of the heat source unit.

REFERENCES:
patent: 5009076 (1991-04-01), Winslow
patent: 5044168 (1991-09-01), Wycoff
patent: 5186014 (1993-02-01), Runk
patent: 5241833 (1993-09-01), Onkoshi

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