IfIceRoomFanDoesNotOperate; IfIceRoomFanDoesNotOperate - Samsung RFG298HD Service Manual

TROUBlESHOOTING

4-2-3.IfICERoomFandoesnotoperate

-ThisrefrigeratorhasBLDCFANmotor.BLDCmotorisdrivenbyDC7~12V.
-WhenCOMPON,normallyoperateswithF-FANmotor.
- Ifthereisanytrouble,youshouldselecttheself-diagnosticfunctiontocheckthetroublebeforepoweroff.
- W henpressingtheICETESTS/Wforacertainperiodoftime(over
1.5sec),thefunctionisaccomplished.AfterbeginningofTEST
mode,Icemakerheaterturnsonforinitial2minutes,iftheice
makingtemperatureisbelow0℃.
-Ifitexceeds0℃,Icemakerheaterturnsonforinitial30seconds.
- A fterIcemakerheaterturnsonfor30seconds,itturnsoffand
thenIcemakermotorturnson.
- A stheIcemakermotorturnson,TESTMODECOUNToperates.
(6minutescount)
Condition
-Ambienttemperature:32℃/75%
- N otch:2℉/38℉(-19.0℃/3.3℃)
Initialfulloficebucketcapacity:794g,58ea
IceRoomcontroltemperature
IceON
IceOFF
Reference
CN76"6"willgeneratethepulsesignalwhenmotorrotates.
ThesesignalswillbeinputintoMICOM.
Unlesssignalsarenotinputduringmotoroperating,willbeON
10secondsafterfanOFF.Butifsignalsarenotstilltaken,theabove
operationwillberetriedfourtimesmore.Ifsignalsarenottaken
continuously,themotorwillberestartedafter10minutes.
Thisfunctionisagainstthecasethatmotormovementwouldbe
restrainedbyforeignmatterslikeice.
FANpulsevoltage PCBTypicalGround
CN76-"6"(Pink) J23JUMMPER
Thevoltageisvariableduetopulsesignal
butmeasuredabout2~3VwiththeMulti-
Meter.
☞Displayforcheckingtheself-diagnosticfunction
IceRoomFANERROR
8.6℉(-13 )
℃
26.6℉(-3 )
℃
※PredictedCause
①FAN-MOTORtroublesitself
②Badwiringconnections.
③WrongInputofthefanmotorrotationpulse
☞   C heckingmethodofIceRoomFANMotorVoltagewiththevoltagebetweenIceRoomFAN;
CN76-"1"(Gry)shallbelessthanDC7~12V.
-IceRoomFANMotorVoltageshallbelessthanDC7~12V.
1)IceRoom-FAN
74
Start
IsCOMPRESSORON?
yes
Isthevoltagebetween
MAINPCBGroundJ23JUMMPER
andCN76-"2"(Black)around
DC7~12V?
No
IstheIce
Roomtemperaturesuitablefor
theFanworking?
yes
DoesDC7~12Valternate
withbelowDC2VbetweenMAIN
PCBGroundJ23JUMMPER
andCN76-"2"(Black)?
yes
No
Executemanualoperation
yes
FANworksnormally
No
Operation
temperature/ready
No
ReplaceMAINPCB
Ground
PCBTypicalGround
J23JUMMPER