Samsung RSE8KPAS Dokumentacja Pobierz pdf (Strona 84)

Circuit Descriptions

Note) SSR(Solid State Relay) is a kind of Relay.

*COMP. equivalence circuit of drive section

12-11) Load Drive Circuit

1) The control of load in the system is accomplished by the main PCB.

2) Most of relays or SSRs can control the compressor, refrigerator/freezer defrost heater, and several option

functions.

3) For the compressor, #37 pin of micro processor signals High (5V). This signal enters #8 pin of IC73 and #11 of

output terminal which have base and collector functions of IC73 turns on and connects the GND. Relay 72 will

be grounded through #11 of IC73.Magnetic field will generate so that the second side of RY72 is activated and

230V is supplied to the compressor. On the other hands, if #37 of micro processor turns Low(0V), #8 of IC73,

the current of RY 72 relay, and magnetic field will shut down in sequence. A contact point in secondary side of

Relay 72 is off. Finally compressor will stop.

4) The principles of other loads is the same as 3) item described.

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Samsung RSE8KPAS Dokumentacja Strona 84