V21 Parts & Service Manual
All V21 Identified Equipment
REV A – 10/2013
P/N: 1230328
• To change the setting press (2) and the current set point temperature will begin to
flash.
• Press (1) to increase or decrease the set point.
• Releasing (1) and pressing again will decrease the set point
• Press (2) to save your changes.
• Press (3) to exist and return to the display to “Refrigeration.”
To display the temperature:
• Press (2) when the display reads “Refrigeration.”
• Press (1) until the display reads “Sensor Reading.”
• Press (2) and the current temperature will be shown in Fahrenheit or in Celsius.
• Press (3) to exit and return the display to “Refrigeration.”
To change the degree scale:
• Press (2) when the display reads “Refrigeration.”
• Press (1) until the display reads “Degree Setting.”
• The display will show the current degree scale (Celsius or Fahrenheit).
• Press (2) and the degree scale will begin to flash.
• Press (1) to choose setting.
• Press (2) to save setting.
• Press (3) to exit and return the display to “Refrigeration.”
To change the Fan Energy Savings mode:
• Press (2) when the display reads “Refrigeration.”
• Press (1) until the display reads “Fan.”
• The display will read “Fan X” with the current setting displayed.
• To change the setting press (2) and the current Fan mode will begin to flash.
• Press (1) to increase the Fan mode.
• Releasing (1) and pressing again will decrease the Fan mode.
• Press (2) to save changes.
• Press (3) to exit and return the display to “Refrigeration.”
The refrigeration system shall have three types of fan mode operation (energy conservation
modes) – This requires fan relay needs to be installed.
Fan Mode 0 (Disable)
The refrigeration system shall have a fan mode of operation in which the evaporator fan will be
turned on/off based on the activation of compressor. When the fan mode 0 is activated through
the Service Modes, the controller shall always turn on evaporator fan.
Fan Mode 1
The refrigeration system shall have a fan mode of operation in which the evaporator fan will be
turned on/off based on the activation of compressor. When the fan mode 1 is activated through
V21 12.3
Programming HVV | P4-10
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