Load Operation - Samsung SR-L677EV Service Manual

6-7. Load Operation

If MICOM outputs "high" signal to driver-IC(KID65003AP/S1P2655AØ3) according to each load
operation conditions, IC turns on and DC 12V flows to ground through the relevant relay coil. Then,
core is magnetized by the coil current, and relay contact switches on. When relay contact is on, AC
POWER is supplied to the relevant operation load, then which will be activated. If MICOM outputs
"low" signal, load operation stops with the relevant relay contact off.
RELAY
Defrost Heater
COMP
on
on
off
off
Like the above block diagram, operation of F, R defrost heater is detervminedy 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 dose not pass through the heater though relay
works, But, if Comp relay is connected to NC terminal, comp does not operate and heater gets
electrieity according to operation of F, R defrost relay.
off
Comp Operation
on
Comp off, Defrost-Heater Off
on
Defrost-Heater On
off Comp Off, Defrost-Heater Off
Load
23
Remark
Defrost-Heater Power Off
Comp Power Off