Samsung RFG298HD Service Manual page 73

TROUBlESHOOTING
11)PANTRyRoomDamperHeaterhastrouble(OPTION)
ERRORCode
MeasurethevoltageofResistance
between ① - ② after
CN77connectoropen/1350ohm±7%
Initial
powerOn Heateroff
MICOM
#56
3.5V~
condition
4.8V
☞CheckingmethodofFlexzoneRoomDamper
resistanceCN77-"1"(Black)↔"2"(Brown)
 * *Ω∞:Open(wiredisconnection,heater
disconnection)trouble/0Ω:Shorttrouble
Working
heater
3.5V~
0V
4.8V
Start Start
NO
IsDamperHeater
normal?(about135ohm)
yES yES
NO
IsMAINPCBconnector
(CN77)insertedcorrectly?
yES yES
NO
Istheinputvoltageof
IC01MICOM#56normal?
yES yES
Normal(recheck)
72
Badcontactofconnector/insertcorrectly
1) Wire connector
2) Replace Heater
1)Recheckthewire
2)ReplacePCBMAIN