Samsung WA48H7400AW/A2 - Page 27

Troubleshooting _ 25
Symptom Check Code Countermeasure Troubleshooting Procedure Measurement Picture
DoorCheck
►DC
This may occur when the door switch is defective. This may occur when the main PCB is defective.
• CheckifadECheckoccursduringthe
boiling course.
• AsthisCheckoccursbecausethedooris
opened,closethedoor.
• Since120Vpowerisconnected,checkif
thepowercordisdisconnectedorcheckthe insulation status and repair it if necessary.
• IfthemainPBAdoordetectioncircuitis
defective,replaceit.
1.ChecktheresistanceforReed SW(CheckingPart:White-Green Wire) -Resistance:Approx0.2Ω between the terminals of Reed SW. 2.ChecktheresistanceforMotor (CheckingPart:Black-Brown Wire) -Resistance:33Ωto46Ωbetween the terminals of Motor.
►DC1 DC2
Thedoorlockswitchunitis not inserted. Thedoorlockswitchunitis damaged. The wire is disconnected. Thedoorlockswitchunitis defective. This may occur due to a defect of the main PCB.
• Checkwhetherthedoorlockswitchunitis
inserted.
• Checkwhetherthedoorlockswitchunitis
damaged.
• Checkthedisconnectionofthewire. • Ifthedoorlockswitchunitisdefective,
replace it.
• IfthemainPCBisdefective,replaceit.
3.ChecktheresistanceforLock/ UnlockContact (CheckingPart:LockWhite-Red WireUnlockWhite-BlueWire) - Resistance: Resistance: Approx0.2Ωbetweenthe terminals of Contact. ChecktheDoorLock/Unlock state.
SwitchCheck (MainRelay Check)
►BC2
The Power button is continually pressed. Abuttonotherthanthe Power button is continually pressed.
•CheckwhethereitherthePowerswitchora tact switch is continually pressed. •CheckwhethertheservicePBAholding screws are fastened too tight. If they are fastenedtootight,loosenthemalittle. •IfthemainPBAswitchingICon/offCheckhas occurred,replacethemainPBA. •The“E2”Checkoccursifthemainrelay connectionsareincorrect.Checkthe connections.IfthereisnoCheckinthe connections,replacethemainPBA.
Checkthecontactbetweenthe control panel buttons and their corresponding tact switch. - There must be a gap between a control panel button and its corresponding micro switch. Otherwise,anCheckoccurs afterapprox.30secondshas passed.