Refrigeration control circuit with self-test mode

Details Refrigeration control circuit with self-test mode Refrigeration control circuit with self-test mode

1994-09-26

1995-10-03

Tanner, Harry B.

Refrigeration

With indicator or tester

Operatively correlated with automatic control

62127, F25B 4902

Patent

active

054542308

ABSTRACT:
A defrost controller for a refrigerator/freezer including one or more of the following features: (1) a timer module that can serve as a real time, cumulative time or variable time defrost timer; (2) an algorithm to control defrosting in view of frequent power outages; (3) a power up defrost cycle; (4) a default reaction to loss of compressor run information; (5) a simple manufacturing test initiator; (6) a test initialization via thermostat actuation; (7) a relay power supply which supplies two different energization voltages; (8) a relay energization signal which decays rapidly from a voltage in excess of the relay rated voltage to a voltage within the relay rated voltage; and (9) respective relay energization sequence to overcome light contact welding.

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