Thermo King UT-1280, Руководство оператора

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Unit Operation
48
Initiating a Manual Defrost Cycle
Defrost cycles are usually initiated automatically based on time
or demand. Manual defrost may also be available. Defrost is
only available if the unit is running and the evaporator coil
temperature is less than 45 F (7 C). Other features such as door
switch settings may not allow manual defrost under some
conditions.
To initiate a manual defrost cycle, press the DEFROST Key as
shown in Figure 34. If conditions allow, the unit will enter a
defrost cycle and the amber LED next to the DEFROST Key
will glow.
Figure 34: DEFROST Key
IMPORTANT: During the defrost cycle, the box temperature
will rise toward 50 F (10 C). This is normal and is caused by
the defrost cycle warming the evaporator coil. Since the
damper door is closed during the defrost cycle, this warm air
is not allowed to pass into the truck box.
Figure 35: Box temperature will rise toward
50 F (10 C)
Terminating a Defrost Cycle
The defrost cycle terminates automatically when the coil
temperature is greater than or equal to 52 F (11 C) or the
maximum defrost timer expires. Alarm code 14, Defrost
Terminated by Time, will generate if the maximum defrost