Carrier NEOS 100S, Руководство по эксплуатации и обслуживанию

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62-11848 4-2
4.1.2 Frozen Mode
The unit operates in frozen mode if the set point is below 10°F (-12°C). In this case, the unit switches to two modes
of operation, as shown in
Figure 4.2 .
Figure 4.2 Operating Sequence - Frozen Mode
4.2 DEFROST CYCLE
Defrost is an independent cycle overriding cooling and heating functions in order to melt frost and ice from the
evaporator when necessary.
Defrost may be initiated automatically by the microprocessor or manually by the operator.
In defrost mode, the microprocessor displays “dF” on the cab command and setpoint is no longer displayed.
During defrost, the evaporator fans shut down and operation of the condenser fan is controlled by the microproces-
sor. For a description of the refrigeration circuit during heat and defrost, see
Section 2.8.2 .
4.3 MINIMUM OFF TIME
Once the unit has cycled off, it will remain off for the minimum off-time of five minutes. This prevents rapid cycling
due to changes in air temperature. Air temperature in the box changes rapidly but it takes time for the product tem-
perature to change.
+
ºC
SETPOINT
Differential between setpoint
and box T° decreases Differential between setpoint
and box T° increases
COOL
COOL
DEAD BAND