Samsung SR-65NMC, SR-65KTC, SR-69NMC, SR-61KTC, SR-61NMC specifications BLDC MOTOR Operation Circuit

8. BLDC MOTOR Operation Circuit

1)Operate description of BLDC MOTOR First, if FAN became before operate condition of FANMOTOR, condition of in the temp. are high temp. more than FAN of recently institutionn NOTCH is operated condition.

ex)CONNECTOR CN 70’S third voltage : Input VL, Vcc 5V(Used Diode regard DROP)

Perated High RPM
V L = Gain * Ei
Gain = (R705+R704)/R704	Ei = R703/(R701+R703) * Vcc
= (20K + 10K)/10K	= 10K/(820 + 10K)*4.4
=3	= 4.07

V L = 4.07*3=12.24 (Change it for resistance error)

1-1) FANMOTOR in the freezer(F-FAN)

A. If refrigerator’s power is confimated, check the temp. of F-FAN and temp. more than F-FAN on is operated“HIGH RPM”to sign of MICOM #13 PORT. After arrived FAN OFF, if FAN is OFF and separate function of ON.OFF isn’t confimated always NICOM #12 PORT is confimate sign and operated“LOW RPM”

B“. HIGH RPM”is determinated the resistance of R701, LOW RPM is determinated the resistance of R702. C. When check RPM, check the wire to resistance of R715 and it is knew to MOTOR RPM.(wire *4)

D. Operated condition to Motor is received wire sign to MICOM #7 PORT but if it isn’t regular wire, FAN is stopped and operate again after 5 minutes.

※When power freeze and forced operation, always operated“HIGH RPM”without temp. of freezer.

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