Wolf Sub-Zero ICB400 Series Service Manual page 35

Electronic Control System
MODEL ICB427R REFRIGERATOR SECTION
ELECTRONIC CONTROL TERMINOLOGY & COMPONENT DESCRIPTIONS
The table below defines some of the basic electronic control system terminology.
Term/Component
Main Control Board .................. The printed-circuit board (PC Board) which contains a microprocessor, relays, triacs and
Microprocessor ....................... An electrical component on the control board which receives electrical signals from
Relay .................................... An electrical component on the control board which switches other components in the
Triac ..................................... Similar in function to the relay, the triac is a three terminal semiconductor for controlling
Control Panel Assembly ........... (Also referred to as the Control Keypad Interface), is that part of the electronic control
Membrane Switch ................... Part of the control panel assembly, which consists of the function keys.
Keys (Function Keys) ............... The "buttons" on the Membrane Switch used for input operations: "POWER", "ALARM",
LCD (Liquid Crystal Display) ..... A semi-liquid substance sandwiched between glass in the display of the control panel
Indicators ................................ The words, numbers and icons that appear on the display of the control panel assembly
Error Codes ............................ The code numbers that may appear on the display of the control panel assembly when
Temperature Units of Measure.... Temperature observed on the display of the control panel assembly may be in Celsius
Set-Point ............................... The desired zone temperature, established by pressing the COLDER or WARMER
High Offset (Cut-in) .................. As the zone air temperature cycles up and down, the high offset is the maximum zone
Low Offset (Cut-out)................. As the zone air temperature cycles up and down, the low offset is the minimum zone air
Thermistor ............................. (Also Referred to as a Temperature Sensor), is a resistor with which resistance changes
7011544 - Revision A - November, 2008
International W
International W
Definition / Description
electrical connections that monitor and control all functions of the appliance.
other components, processes the information, then sends electrical signals to relays and
triacs on the board to open or close, switching components in the appliance ON or OFF.
appliance ON or OFF when instructed to do so by the microprocessor.
current in either direction.
system where all input operations are performed (located at top front of upper drawer).
WARMER" and "COLDER"
assembly. The molecules of this semi-liquid substance have no specific orientation.
However, when electricity is applied to them, they react predictably, aligning and
straightening in such a way as to control light passage.
through the use of LCD's.
accessing Error Code History. Error Codes are logged if the unit experienced specific
problems related to electrical signals supplied by electrical components.
units of measure (°C) or Fahrenheit units of measure (°F). A series of key strokes
allows the temperature units of measure to be switched to display as either °C or °F.
keys.
temperature that the electronic control system will allow before calling for cooling.
temperature that the electronic control system will allow before interrupting cooling.
as the temperature around it changes. For electronic control system purposes, the
microprocessor measures the resistance, then displays it as a temperature reading.
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ine Storage
ine Storage
(ICB400)
(ICB400)
Series
Series