SAMWONTECH
1st Edition of TEMP880S IM : Sep. 21. 2005 Page 35 / 101
▶ Defrost control operates when it enters ‘defrost cycle’ which is set up by confirming the
▶ number of repetition of program pattern under operation when a thermal shock tester is
▶ running. If it enters ‘defrost cycle’ segment currently running starts Defrost control in the
▶ initial sector instead of low temperature room. Once Defrost control begins, low
▶ temperature room executes Defrost control with ‘Defrost SP’ already set up.
▶ When Defrost control starts and ‘Defrost time’ goes by, set value of low temperature room
▶ is changed to precooling set value which is set up in the present program pattern, and a
▶ thermal shock tester is converted to ‘under operation preparation(Wait)’ until low
▶ temperature room completes precooling.
▶ Examples
■ Defrost CYCLE = 3 intervals
■ Defrost SP = 20 ℃
■ Defrost Time = 10 min
Diagram-25. Defrost Control Cycle Example
Diagram-26. Defrost Control Motion Example
Defrost Control Motion
CYCLE-1
CYCLE-2
CYCLE-3
CYCLE-4
CYCLE-5CYCLE-6
CYCLE-7
CYCLE-8
CYCLE-9
DEFROST CYCLE
DEFROST CYCLE
Preheating SP
H.TSP
DEFROST SP
(20℃)
L.TSP
Precooling SP
DEFROST Time
(10 min)
DEFROST Control
CYCLE-4 Operation
Under operation
preparation
CYCLE-5
CYCLE-6
CYCLE-3(DEFROST CYCLE)
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