Refrigerant Metering Device; Components Description - Ice-O-Matic Gourmet UCG Series Installation And Service Manual

4. REFRIGERANT METERING DEVICE

Capillary Tube

5. COMPONENTS DESCRIPTION

a. Evaporator Temperature Sensor
The evaporator temperature sensor probe, located in contact with the evaporator
serpentine, detects the dropping of the evaporator temperature during the freeze
cycle and signals it by supplying a current flow to the microprocessor of the PC Board.
According to the current received, the small red LED of the PC Board is energized
(blink or steady). When steady, the microprocessor supplies power to the electronic
timer built into the PC Board so that it takes control of the last portion of the freeze
cycle. The length of the timed phase is pre-fixed by the setting of the keys 1, 2, 3, and
4 of the DIP SWITCH.
If after 15 minutes from the beginning of the freeze cycle, the evaporating
temperature has not yet reached 32˚F (0˚C) – small red LEF OFF – the PC Board
switches OFF the machine with the blinking of WARNING RED LED.
UCG GOURMET SERIES UNDERCOUNTER
pg. 17