Samsung DMT400 series Service Manual Download Page 47

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4. Troubleshooting

4-14

Error type

Error mode

Checking Method

Corrective actions

The nozzle does not
inject water

None

1. Check the connections for the Circulation Motor

connector.

- Reconnect the Circulation Motor connector.

2. Check the connections for the Startup Condenser

connector of the Circulation Motor.

- Reconnect the Startup Condenser connector of the Circulation Motor.

3. Check the resistance for the Circulation Motor coil.

(Remove the connector before measuring.)

- Between black wire and white wire

Normal: Approx. 15

- Between black wire and blue wire

Normal: Approx. 21

- Faulty: Replace the Circulation Motor.

4. Check the operation of the Circulation Motor Relay.

- At No.2 mode in service inspection mode,
Check the operating voltage between the

yellow wire of the CN101 connector and the
white wire of the CN201 connector.
Normal: 120V (while operating)

- At No.3 mode in service inspection mode,

Check the operating voltage between the
yellow wire of the CN101 connector and the
blue wire of the CN201 connector.
Normal: 120V (while operating)

- Faulty: Replace the Main PBA assy.
- Normal: Replace the Circulation Motor.
- Remove

retainer.

- Check voltage while operating Wash motor-2(High)

- Check voltage while operating Wash motor-1(Low)

5. Check whether there is foreign material in the water

passages.

- Remove foreign material from the water passages.

Summary of Contents for DMT400 series

Page 1: ...s 2 Features and Specifications 3 Disassembly and Reassembly 4 Troubleshooting 5 PCB Diagram 6 Wiring Diagram 7 Schematic Diagram 8 Reference Prgho Frgh DMT800RHS XAA DMT800RHS XAC DMT800RHB XAA DMT800RHB XAC DMT800RHW XAA DMT800RHW XAC DMT700RHS XAA DMT700RHS XAC DMT700RHB XAA DMT700RHB XAC DMT700RHW XAA DMT700RHW XAC DMT400RHS XAA DMT400RHS XAC DMT400RHB XAA DMT400RHB XAC DMT400RHW XAA DMT400RHW...

Page 2: ...sconnect the circuit ࣃ breaker or power cable before servicing Failing to do so may result in a risk of electric shock Do not allow consumers to connect several appliances to a single power outlet at the ࣃ same time There is a risk of fire due to overheating When removing the power cord make sure to hold the power plug when pulling the plug ࣃ from the outlet Failing to do so may damage the plug an...

Page 3: ...er terminals before starting the service ࣃ Failing to do so may result in a high voltage electric shock When replacing the heater make sure to fasten the nut after ensuring that it is inserted ࣃ into the bracket heater If not fasten the nut of the heater it cause water and electric leakage After Servicing Check for any water leakage ࣃ Perform a test run for the dishwasher using the standard normal...

Page 4: ...ess a control button using a sharp tool or object ࣃ This may result in electric shock or damage to the product During Servicing When wiring a harness make sure to seal it completely so no liquid can enter ࣃ Make sure that they do not break when force is exerted Check if there is any residue that shows that liquid entered the electric parts or ࣃ harnesses If any liquid has entered into a part repla...

Page 5: ...us of the parts ࣃ They must be the same as before servicing Check whether the product is level with the floor Check if there are any deformations in ࣃ the sink Check that the dishwasher is firmly installed to the sink Vibrations can shorten the lifetime of the product ...

Page 6: ...ntrol technology is used for the quietest ሪ possible operation Your new Samsung dishwasher will be quieter than ever Self cleaning filter Cleaning the filter yourself is a thing of the past This product ሪ keeps food waste internally while operating then drains it automatically with the water Storm wash For DMT800 DMT700 series With a jet stream like a geyser Storm Wash effectively ሪ cleans big hea...

Page 7: ...0 psi 140 830 kPa Wash type Rotating nozzle spray Dry type Air diffusion condensing dry system Power usage Main Motor 2 step 185W 150W Heater 1100W Standard amount of used water 5 3 7 9 gallon 20 30L Normal Cycle Size W D H 23 x 24 x 33 inch 605 x 627 x 860 mm Above images might differ in the dishwasher models Middle nozzle Upper rack Lower rack Cutlery basket Air brake Base Dispenser Door Lower n...

Page 8: ...n Sensors O O O O O Drying method Air diffusion condensing Basket Height Adjustment One touch One touch 2 stage One touch 2 stage Leakage Sensor O O O O O Programs 6 Normal Heavy Delicate Pot Pans Quick Smart Auto 6 Normal Heavy Delicate Pot Pans Quick Smart Auto 4 Normal Heavy Delicate Smart Auto 6 Normal Heavy Delicate Rinse Quick Smart Auto 4 Normal Heavy Delicate Quick Options 6 Delay Start Sa...

Page 9: ...ll kit for Top mounting Bracket install Screw DD94 01002A 2 2 Screw for side mounting 2 User Manual DD68 00050A DMT800 DD68 000xxA DMT700 DD68 00074A DMT400 1 Installation Guide DD68 00046A 1 Elbow 1 Sold separately Water Supply Line Flexible STS supply line is recommend 1 Air Gap 1 Rubber Connector 1 Hose Clamp 1 Strain Relief 1 2 4 2 Features and Specifications ...

Page 10: ...2 5 2 Features and Specifications Memo ...

Page 11: ...the residual water inside the product Drain the water by operating the drain pump 2 Close the water supply valve 3 Turn off the power disconnect power cable You must turn off the circuit breaker connected to the product 4 Pull out the unit from the sink and lay it on the floor Be careful of the drain hose when pulling out the unit Fdxwlrq When pulling out or laying the dishwasher down for service ...

Page 12: ...ving a full scale range of 250 volts or higher After service is completed be sure all safety grounding circuits are complete all electrical connections are secure and all access panels are in place Before servicing make sure to remove all items include baskets inside dishwasher Part Photo Description Terminal Fasten type P Lock type This dishwasher use 2 kinds terminal type Fasten type P Lock type...

Page 13: ... type ones at right side 4 Remove the three 3 screws on the PBA board 5 Pull out the PBA board carefully When removing the Main PBA lift up the PBA board carefully because it is hanging to the PBA case with two 2 hooks If you feel hard to disconnect the wire connectors Follow the below a Release two 2 fasten type connector located right side b Unscrew the three 3 screws in PBA board pull out the P...

Page 14: ...ing screws make sure to hold the tub front using your hand It can prevent closing door suddenly and harming you Caution Do not place the removed screws on the tub front They may fall into the sump assy 2 Pull out the Frame front the Assy control panel carefully 3 Remove the Assy control panel from Frame front Pull out just a little and push down it Door Lock Switch Door latch Preparation Disassemb...

Page 15: ...ver 2 Rotate the window panel to upside and disconnect the wire connector 3 Release the two 2 screws on the window panel to release the guide LED Control Panel DMT400 Preparation Disassemble the frame front Assy control panel and Door lock switch Refer the Frame front disassembly section to separate the Frame front 1 Remove two 2 connectors in the display PCB 2 Pull the control panel up slightly f...

Page 16: ...er the Frame front disassembly section to separate the Frame front 1 Remove two 2 connectors in the display PCB 2 Pull the control panel up slightly from Assy frame front and pull it out 3 Unscrew two 2 screws to remove display PCB and guide LED 4 Disconnect the 2 wire connectors from control panel touch PCB 坍 Reassembly is in the reverse order of the removal ...

Page 17: ...trol panel Refer the Frame front disassembly section 1 Remove the two 2 connectors from thermal actuator Dry Fan motor 2 Open the door Remove the three 3 screws holding the bracket cover fan and Assy case vent 3 Remove the cover fan by rotating using a tool counterclockwise NOTE Use a jig If you have no jig use a tool such as a long nose pliers Remove it carefully so that the part is not damaged 4...

Page 18: ... are fixing by four 4 hooks To disassemble hooks are broke down in the Assy dry duct Caution Only when dry motor is not working disassemble it After remove it you should use new Assy dry duct part to reassemble 7 Pull out Assy dry duct Assy Case Vent 1 Remove the Assy case vent 2 Release two screws 3 Pull the thermal actuator firmly to remove it from the housing and to release it from the gasket v...

Page 19: ...o its original starting position The magnetic sensor 3 are connected to rinse aid lack warning light at control panel by wires When the indicator lights up it should add more rinse aid Preparation Disassemble the frame front Refer the Frame front disassembly section to separate the Frame front 1 Remove the three 3 connectors blue on both sides of the dispenser Caution Right side s rinse aid level ...

Page 20: ...ounterclockwise 3 Lower Nozzle Pull out carefully it from the Assy sump Duct Nozzle 1 The duct nozzle is fixed by two brackets inside tub Use a flat screwdriver to remove it Be careful don t make scratch on tub 2 Release the hooks clamping the bracket duct U the bracket duct M using a flat screwdriver 3 Remove the duct nozzle by rotating to left side Storm wash Nozzle DMT800 DMT700 1 Release the s...

Page 21: ...tate slightly the duct nozzle Assy case sump each other 3 Release the screw 1 that is fixing the impeller and circulation motor shaft Caution Use the gloves for your hand to hold the impeller during releasing the screw Be careful your hands to harm Only for DMT800 DMT700 series 4 Remove the plate distribute 5 Remove the case scroll Check if the seal rubber scroll is normal If it is damaged or hard...

Page 22: ...er water supply drain hose connections Remove the upper lower baskets in the dishwasher Pull out the dishwasher carefully 1 Remove the two 2 screws of the frame left 2 Remove the frame left Caution Make sure to wear gloves when removing it Be careful as the steel plate may harm you 3 Remove cover brake rotating it counterclockwise Use a jig If you have no jig you can use a long nose pliers coverin...

Page 23: ...oosen the clamp left side in picture and release the hose from the Assy case brake 2 You can see the hose holder in the dishwasher backside 3 Push the three 3 hooks of the drain hose holder to inside 5 Pull out the hose carefully at side position 6 Remove the hose holder by releasing the hook 7 Remove drain hose entirely 坍 Reassembly is in the reverse order of the removal ...

Page 24: ...2 screws Rear Leg Case gear Adjust leg bar Preparation Make sure to disconnect the power water supply drain hose connections Remove the upper lower baskets in the dishwasher Pull out the dishwasher Lay down the dishwasher on its back carefully Remove the shutter 1 Rotate the rear leg adjust bar below Door to right turn entirely until pull out the rear leg 2 Release the screw that is holding case g...

Page 25: ...ut disconnecting wire connectors When remove case PCB lift up two 2 clasps using flat screwdriver as lever effect 2 Pull out the case PCB and fix it using standard duct tape like as picture 3 Remove the four 4 screws on both sides of the bracket front lower 4 The bracket front lower is fixed with the guide wire with three hooks Use a long nose pliers or flat screwdriver 5 Using a Philips screw dri...

Page 26: ...Remove the two 2 screws and ground wire screw from the inlet valve 2 Lift up the inlet valve and disconnect the inlet valve wire connector 3 Release the hose clamp and disconnect hose Caution Take care when holding and removing the clamp with a tool as it may bounce and harm you Caution Make sure to remove remain water in the dishwasher If not wet the floor Thermistor Preparation Disassemble the s...

Page 27: ...n water in the dishwasher If not wet the floor The drain pump has a seal 2 Disconnect the two 2 drain pump connectors Turbidity Sensor Preparation Disassemble the shutter Refer the shutter disassembly section 1 Remove the turbidity sensor connector 2 Remove the two hooks from the turbidity sensor Caution Use a flat screwdriver carefully to remove it from the Assy sump preventing breakage The turbi...

Page 28: ...motor in place 3 Pull out the distributor motor and micro switch holding by hooks Be careful removing it because it has cam switch and a seal in opposite side Circulation Motor Preparation Disassemble the cover sump cutter disposer and shutter Refer the each disassembly section 1 Remove the circulation motor and capacitor connection 2 Remove the four 4 screws holding the circulation motor and the ...

Page 29: ...ion 1 Remove the two 2 heater connectors 2 Remove a ground screw on the heater bracket 3 Release a nut using nutdriver 10mm 4 Push the heater inside of case sump carefully Caution The heater may be very hot Make sure to check it before touching the heater Caution Make sure to check whether any water is left Remove any remaining water to prevent water leakages while servicing 坍 Reassembly is in the...

Page 30: ...ssembly section 1 Remove the parts which are connected with Assy sump connectors drain pump screws 2 Remove the three 3 screws holders in Assy sump Pull out the holder outside using long nose pressing the hook using driver 3 Push the Assy sump using your hands toward the inside carefully Caution Make sure to remove remain water in the dishwasher If not wet the floor 坍 Reassembly is in the reverse ...

Page 31: ...ws of the base plate both side in Red circle 2 Lay down the dishwasher on its back carefully 3 Remove the cover PCB and pull out case PCB with disconnecting wire connectors 4 Disconnect the wire connectors from Assy Sump 5 Pull out the base plate to downside slightly 6 If need remove other parts Ex Main wire harness Hoses 坍 Reassembly is in the reverse order of the removal ...

Page 32: ...e fastened correctly Check whether they are fastened with the specified torque 5 Remove foreign material Check whether any foreign material such as soil wire scraps and screws are in the dishwasher Check whether any foreign material is entering through the sump into the disposer 6 Check for water leakage Check whether there is water leakage from the hose connector door case sump drain motor circul...

Page 33: ...3 23 3 Disassembly and Reassembly Memo ...

Page 34: ...ven 73 seconds after the water supply 2 When ﬂow meter pulse is 5 or less for 13 seconds after the water supply starts 3 When the water supply does not complete 6 minutes after the water supply starts Alien particles within water supply valve Water supply valve terminal not connected Possible defect Main PBA Water supply valve Flow Meter High temperature Water supply error When 80 C or above is de...

Page 35: ...upply 2 When ﬂow meter pulse is 5 or less for 13 seconds after the water supply starts 3 When the water supply does not complete 6 minutes after the water supply starts Alien particles within water supply valve Water supply valve terminal not connected Possible defect Main PBA Water supply valve Flow Meter High temperature Water supply error When 80 C or above is detected during water supply Water...

Page 36: ... A nozzle does not inject water If Low Level sensor is detected before Circulation Motor is operating LL and Lc will blink When water is filled enough Circulation Motor 2 190W will be operated No 3 Ld Circulation Motor A nozzle does not inject water If Low Level sensor is detected before Circulation Motor is operating LL and Ld will blink When water is filled enough Circulation Motor 1 150W will b...

Page 37: ...eater Half Load Motor Operate each operating part when the key is pressed See the below When the Smart Auto Key is pressed Water supply is On Smart Auto LED On and pressed again it is Off Smart Auto LED Off When Heavy Key is pressed each time it works the Circulation Motor 1 is On Heavy LED On Off Heavy LED Off Circulation Motor 2 is On Heavy LED On Off Heavy LED Off Dry Fan Motor is On Heavy LED ...

Page 38: ... is occurred after water supply was done Turbidity Error Normal Heavy LED will blink If all functions in this mode are completed Wash LED will blink No 2 Delicate LED Circulation Motor A nozzle does not inject water If Low Level sensor is detected before Circulation Motor is operating Delicate Sanitize LED will blink When water is filled enough Circulation Motor 2 190W will be operated No 3 Delica...

Page 39: ...e Smart Auto Key is pressed Water supply is On Smart Auto LED On and pressed again it is Off Smart Auto LED Off When Heavy Key is pressed each time it works the Circulation Motor 1 is On Heavy LED On Off Heavy LED Off Circulation Motor 2 is On Heavy LED On Off Heavy LED Off Dry Fan Motor is On Heavy LED On Off Heavy LED Off Drain Pump is On Heavy LED On Off Heavy LED Off When Delicate Key is press...

Page 40: ...lace the Inlet Valve 6 Check whether the Inlet Valve is operating normally Check the operation of the Inlet Valve Normal 120V Check the Inlet Valve Relay Check the voltage between the yellow wire of the Main PBA CN101 connector and the brown wire of the CN202 Normal 120V while operating Faulty Replace the Main PBA assy Normal Replace the Inlet Valve Remove Retainer Check voltage 7 Check whether th...

Page 41: ...he Drain Hose Remove the foreign material from the Drain Hose 2 Check the operation of the Water level sensor See the Low level water error 3 Check the connections for the Drain Pump connector Reconnect the Drain Pump connector 4 Check whether the Drain Pump coil is conductive Remove the connector before measuring Normal Approx 25Ω Faulty Replace the Drain Pump 5 Check the operation of the Drain P...

Page 42: ...ctor Faulty Replace the Assy case sensor Remove foreign material from the floater Normal Replace the Main PBA assy Faulty Replace the Assy case sensor Remove foreign material from the floater Normal Replace the Main PBA assy Button error bE Or Normal Delicate LED Check whether there is condensation on the Main PBA connector CN102 Normal No condensation Faulty Remove any condensation and moisture N...

Page 43: ...ing guide class 3 2 Faulty Adjust or Replace the Distributor part Heater Error HE Or Heavy Delicate LED 1 Check the connections of the Heater connectors Reconnect the Heater connectors 2 Check the resistance between both ends of the Heater Check the resistance between both ends of the Heater directly or check the resistance between the red wire of the Heater Relay and the amber and yellow wires of...

Page 44: ... connections for the Overflow Sensor connector Reconnect the Overflow Sensor connector 2 Check whether the Inlet Valve operates normally See Water supply Error 3 Check whether water is supplied even small amounts in the intervals when the Inlet Valve is not operating Remove foreign material from the Inlet Valve If you cannot remove the foreign material from the Inlet Valve replace it 4 Check wheth...

Page 45: ...asure the voltage between both ends of the Thermistor Normal 0 2 to 4 5V Measure the resistance between both ends of the Thermistor Remove the connector before measuring See the Table right THERMISTOR TABLE Temp ºC Temp F Resistance kΩ 5 41 125 780 10 50 98 323 15 59 77 454 20 68 61 465 25 77 49 120 30 86 39 517 35 95 31 996 40 104 26 065 45 113 21 358 50 122 17 599 55 131 14 579 60 140 12 140 65 ...

Page 46: ...place the wires of the power part Check voltage 4 Check the DC voltage of the Main PBA See Main PBA DC voltage error Main PBA DC Voltage Error None Check the DC voltage of the Main PBA Measure the voltage between pin 4 orange of the main PBA CN302 connector and pin 7 pink of the CN301 connector Normal 4 5V to 5 5V Measure the voltage between pin 10 blue of the main PBA CN302 connector and pin 9 wh...

Page 47: ...prox 21 Ω Faulty Replace the Circulation Motor 4 Check the operation of the Circulation Motor Relay At No 2 mode in service inspection mode Check the operating voltage between the yellow wire of the CN101 connector and the white wire of the CN201 connector Normal 120V while operating At No 3 mode in service inspection mode Check the operating voltage between the yellow wire of the CN101 connector ...

Page 48: ...open Normal 2V when the door is closed Reconnect the Door Sensing Switch connectors 2 Check the operation of the Door Sensing Switch Remove the connector before measuring Check the blue wire and the switch connected to the blue wire Normal OPEN when the door is open Normal SHORT when the door is closed Faulty Replace the Door Sensing Switch Normal Replace the Main PBA assy No Washing None 1 Check ...

Page 49: ... for the Dispenser connector Reconnect the Dispenser connector 3 Check the resistance of the Dispenser Remove the connector before measuring Normal Approx 2 3 kΩ Faulty Replace the Dispenser 4 Check the operation of the Dispenser Relay Check the operating voltage between the yellow wire of the CN101 connector and the white wire of the CN201 connector Normal 120V while operating Faulty Replace the ...

Page 50: ...the resistance of the Thermal Actuator Remove the connector before measuring Normal Approx 73 Ω Faulty Replace the Main PBA assy Check voltage 5 Check the operation of the Dry Fan Motor Relay Check the operating voltage between the yellow wire of the C101 connector and the sky wire of the CN201 connector Normal 120V while operating Faulty Replace the Main PBA assy Remove retainer Check voltage 6 C...

Page 51: ...ne 1 Check the connections for the Sub PBA connector Reconnect the Sub PBA connectors 2 Check the LED and Input Key 1 Push Normal Heavy Power Key 2 Push Normal Key 4 times 3 Push all key Normal All LED is light Faulty Replace the Sub PBA 3 Check the DC voltage of the Main PBA See Main PBA DC voltage error ...

Page 52: ... Dry Fan Motor Dispenser 9 RY208 Drain Pump Driving Relay 10 RY209 NC 11 RY207 Inlet Valve Driving Relay 12 RY206 Wash Motor 2 High Driving Relay 13 RY205 Wash Motor 1 Low Driving Relay 14 RY204 Dry Fan Motor Driving Relay No Location Description 15 RY203 Half Load Motor Driving Relay option 16 RY202 Dispenser Driving Relay 17 RY201 Heater 1 Driving Relay 18 RY210 Heater 2 Driving Relay 19 T201 Li...

Page 53: ... T 3 LOW R 4 HIGH LOW T 5 OVER FLOW 6 COLD COUNT 7 5V 8 LEAKAGE 9 SUMP THERMISTOR 10 12V 11 DOOR SENSE CN202 ሪ 1 COLD VALVE 2 NC 3 OPTION 4 NC 5 DRAIN PUMP CN302 ሪ 1 HALF LOAD SENSE 2 TURBIDITY R 3 TURBIDITY T 4 GND 5 5V 6 RINSE SENSE 7 OPTION SENSE CN201 ሪ 1 DISPENSER 2 NC 3 HALF LOAD option 4 NC 5 Dry Fan MOTOR 6 NC 7 WASH MOTOR 1 8 NC 9 WASH MOTOR 2 CN102 ሪ 1 5V 2 12V 3 RXD 4 TXD 5 WAKE UP 6 GN...

Page 54: ...Wiring Diag6am 6 1 Wiring Diagram O Reference Information Abbreviated word Meaning GRY GRAY ORG ORANGE VIO VIOLET PNK PINK YEL YELLOW BRN BROWN WHT WHITE BLK BLACK RED RED SKY SKY BLUE BLU BLUE Y G YELLOW GREEN NTR COLORLESS ...

Page 55: ...7 1 7 Schematic Diagram 7 Schematic Diagram 7 1 MAIN CONTROL This Document can not be used without Samsung s authorization ...

Page 56: ... 8 Reference 8 1 Model Number Naming Rules DMT D Dishwasher M Machine T 24 Tall Tub 8 0 0 R H S 7 8 Best 5 6 Better 3 4 Good 0 2010y 1 2011y 2 2012y R R pjt 0 Basic 1 Ver 1 H Hidden F Front S Stainless B Black W White ...

Page 57: ...rgent and rinse aids to the inside of the dishwasher when they are needed 8 Tub Assy An internal case made of stainless steel that makes up the basic framework of the dishwasher 9 Sump Assy The place inside the dishwasher where water is collected The injected water gathers here after circulation The sump Assy is connected to the circulation motor drain pump and distributor motor 10 Tub Front Assy ...

Page 58: ...l can be punished under applicable International and or domestic law GSPN Global Service Partner Network Area Web Site North America http service samsungportal com Latin America http latin samsungportal com CIS http cis samsungportal com Europe http europe samsungportal com China http china samsungportal com Asia http asia samsungportal com Mideast Africa http mea samsungportal com ...

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