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8-7) Load Operation Circuit Part
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When
"HIGH" signal is applied to INPUT terminal of ICO3(KID65003AP) from MICOM
PIN NO #16(P07), IC is turned on. At this time, V12(DC12V) which is applied to the one
terminal of coil of COMP relay flows to ground through output of ICO3. Then core
generates magnetic field to turn on the connection point, and it applies voltage of 230V
to COMP foad to turn on COMP. When MICOM PIN NO #16 changes to "LOW" state,
electricity cannot flow to COMP relay coil because IC is turned off. So relay connection
point becomes to OFF state and stops COMP.
@ COMP & F,R Defrost Heater Inter-operation Explanation
COMP RELAY
Like the above block diagram, operation of F, R defrost heater is determined according
to the operation of relay for COMP. When COMP relay is connected to NO terminal,
COMP operates. However, in case of F, R defrost heater, electricity does not pass
through the heater though relay works. But, if COMP relay is connected to MC terminal,
COMP does not operate and heater gets electricity according to operation of F, R
defrost relay.
* Purpose of application of above circuit: It aims to interrupt electricity passage through
F, R defrost heater even though F, R defrost relay is bad while COMP is operating.
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