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Service and Installation Manual
5
OPERATION
Refrigerated cycle
Refrigerators: During the refrigeration cycle, the evaporator fans will run continuously unless door is open.
1. Every 6 hours, the unit will turn off and to allow the evaporator coil to defrost. The controller now
displays the defrost symbol. When the coil temperature reaches 45° or after 20 minutes of defrost, the
unit will turn on again.
2. The factory setting for the temperature range is 41° to 33° F.
Freezers: During the refrigeration cycle the controller supplies power to the condensing unit and evaporator
fan motors. The evaporator fans will run at any time when the evaporator coil temperature is below 54° F.
1. Every 6 hours, the unit will turn off and electric heater will turn on to start the defrost cycle. The
controller now displays the defrost symbol. When the coil temperature reaches 45° or after 20 minutes of
defrost, the unit will turn on again.
2. The factory setting for temperature range is -10F to -1°F
SOLID-STATE THERMOSTAT DESCRIPTIONS
1. FRONT PANEL COMMANDS
To display target set point; in programming mode it selects a parameter or confirms an operation.
To start a manual defrost
To view the latest alarm occurrence; in programming mode it browses the parameter
codes or increases the display value
To view the latest alarm occurrence; in programming mode it browses the parameter
codes or decreases the display value
KEY COMBINATION
To lock & unlock the keyboard
To enter in programming mode
To return to the room temperature display
1.1 Function of LEDS
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