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UNDERCOUNTER
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FREEZERS
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TRUEMFG
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control probe = return air
defrost probe = coil
DANFOSS ELECTRONIC TEMPERATURE CONTROL GENERAL SEQUENCE OF OPERATION
DANFOSS ELECTRONIC CONTROL FREEZER / GC WITHOUT DIGITAL DISPLAY
GENERAL SEQUENCE OF OPERATION
1. Cabinet is plugged in.
a. Interior lights will illuminate on glass door models only. If the lights do not come on verify the light switch is in the “ON”
position. Solid door cabinets may or may not have lights that may be controlled by the door switch.
b. Cabinet will start in a Defrost Cycle. The duration for defrost will be a minimum of 4 minutes and a maximum of 30 minutes.
2. The Danfoss control is preprogrammed to initiate defrost every 4 hours of compressor run time.
If deemed necessary by the Danfoss control additional defrost may occur at unspecified times.
a. At this time, the compressor and evaporator fan(s) will turn off and the evaporator coil heater and drain tube heater will be
energized. Some cabinets may also change the rotation of the reversing condenser fan motor.
b. Once a preprogrammed temperature of the evaporator coil is reached, or 30 minutes,the Defrost Cycle will terminate and
the 2 minute delay will occur.
c. After the 2 minute delay the compressor will restart.
d. The evaporator fans will remain off for an additional 3 minutes.
3. The Danfoss control will cycle the compressor and the evaporator fan(s) on and off together.
a. The temperature control is sensing the discharge air temperature.
b. The temperature control should be set on the #4 or #5.
c. The warmest setting is #1, the coldest is #9, and #0 is the off position.
d. The thermometer is designed to read and display a cabinet temperature not a product temperature.
This cabinet temperature may reflect the refrigeration cycle determined by the temperature control.
The most accurate temperature on a cabinets operation is to verify the product temperature.
