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Samsung DMT SERIES, Service Manual

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Samsung DMT SERIES Service Manual Download Page 17

Causes

Check Point

water valve, water level sensor / hose , main PBA

ㆍ

Too much detergent

ㆍ

Chemical reaction

ㆍ

Water temperature

Symptom

ㆍ

Leaves Glasses with A Dim Finish

Step 1 : 

Detergent 

!

Check if water supplied is soft and too much detergent was used.

(

Under load the dishwasher and use a rinse aid to minimize this.

This is called etching and is permanent. To prevent this from happening, 
use less detergent if you have soft water. Wash glassware in the shortest cycle
that will get them clean.

#6. Improper Operation

6-4. Not Clean – If Leaves Glasses with A Dim Finish

! "+#$%&!

that will get them clean.

Step 2 : 

Silica Film or Etching

!

In case of Silica film or etching :

(silica film is a milky, rainbow-colored deposit; etching is a cloudy film)

- Sometimes there is a water/chemical reaction with certain types of glassware.

This is usually caused by some combination of soft or softened water,
alkaline washing solutions, insufficient rinsing, and overloading the dishwasher. 
It might not be possible to prevent the problem, except by hand washing.
To slow this process use a minimum amount of detergent but not less than 1 

tablespoon (15 g) per load. Use a liquid rinse aid and under load the dishwasher to allow 
thorough rinsing.  Silica film and etching are permanent and cannot be removed. 

Step 3 : 

Water Temperature 

!

If water temperature entering the dishwasher exceeds 150

°

F, 

this could be etching. Lower the water heater temperature.

Summary of Contents for DMT SERIES

Page 1: ...pply line connection 6 4 1 Abnormal Noise 4 Noise 7 5 1 No Water Supply 5 Water Supply Problem 8 5 2 No Stop Water Supplying 10 6 Improper Operation 6 1 Not Dry 6 2 Not Clean If Some Food Particles Remains on Dishes 11 13 6 3 Not Clean If Spots and Filming on Glasses and Flatware 15 6 4 Not Clean If Leaves Glasses with a Dim Polish 17 6 5 Cycle Doesn t Start 18 Difficult repair ...

Page 2: ...tents 7 5 9E Low Level Water Error 24 7 6 HE Heater Error 25 7 7 LE Leakage Error 26 7 8 PE Half Load Function Error only DMT 800 27 7 9 bE Button Error 28 7 10 oE Over Level Water Error 29 1 DMT800 DMT610 DMT350 Series Difficult repair Appendix 1 SVC Inspection Mode 31 2 DMT400 Series 33 3 DMR57 DMR77 DMR78 Series 35 7 11 tE Temperature Sensor Error 30 ...

Page 3: ...BA Measure the voltage between the black wire and the yellow wire of CN101 If the voltage is not AC120V check for bad connections or open circuits of the power part Step 4 Main PBA 2 Check for the voltage between pin 4 orange of the main PBA CN302 connector and pin 7 pink of the CN301 connector The normal voltage DC 4 5V 5 5V Check for the voltage between pin 10 blue of the main PBA CN302 connecto...

Page 4: ... of the Water level sensor If it is faulty replace the assembly case sensor and remove foreign material from the float If it is normal replace the Main PBA assembly Step 3 Drain Pump Check the connections of the Drain Pump Check the resistance of the drain pump coils Drain Resistance approximately 25Ω If the value is not normal replace the Drain pump Step 4 Main PBA Check the operation of the Drai...

Page 5: ...shing portion Symptom ㆍWater Leaks from door bottom during washing cycle Step 2 Lower Nozzle Check if the Lower nozzle is bended or divided Step 1 Installation Check if the dishwasher is level If it is tilted forward water can come out through bottom s corner Check if the Lower nozzle is bended or divided Replace new lower nozzle ...

Page 6: ...Step 2 Water Connection 2 Check the threads on the water valve Step 1 Water Connection 1 Check if the water connection is wrong Reconnect water connection properly be sure to use thread seal on the 90 degree elbow fitting ㆍWater Leaks from water supply line connection Check the threads on the water valve Replace the part ...

Page 7: ...the grinding noise occurs during wash cycle hard material may be inside Assembly sump Remove the abnormal item in assembly sump and check the disposer blade Step 3 During Drain Cycle If grinding noise occurs during drain cycle hard material may be inside drain chamber Remove the abnormal item in drain chamber and check the drain pump impeller Step 4 Normal Sound These sounds are not defective plea...

Page 8: ...p 2 Water Line Check if the water hoses are kinked or not Check if the water hoses are blocked by foreign materials Check for water leakage at the connection of water valve Step 3 Water Valve blocked Check if the valve is blocked with foreign materials Advise customers to clean the water valve periodically Step 4 Check when water supply is stopped If the water supply stops after water is supplied ...

Page 9: ...is not normal Replace the Water valve Step 5 Assembly Case Brake If the water supply stops after water is supplied for 5 seconds replace the Assembly Case Brake which is including Flow Meter The Voltage value approximately AC 120V If the value is not normal Replace the Main PBA Step 8 Assembly Case Sensor If the water supply stops after water is supplied fully into the floater in the assembly case...

Page 10: ...p Water Supplying Step 2 Water Level Sensor Check the connections to the Water level sensor Step 3 Main PBA Power on and then check voltage of the water valve If the voltage value is approximately AC 120V even though the valve is not working Replace Main PBA Check the connections to the Water level sensor Check for the operation of the Water level sensor float If it is faulty replace the assembly ...

Page 11: ...any dishes have been loaded Proper loading of items can affect drying Load your dishes as recommended Step 3 Plastic Dishes Check if the plastic dishes are wet Advise customers that plastic dishes often need towel drying as they absorb water and release it well after the dry cycle is completed Step 4 Water Drops Check if water is dropped to lower basket from the upper basket Advise customers to em...

Page 12: ...dishwasher Check if the wire connection to the rinse aid dispenser is firmly connected Check if the dispenser operating relay is operating If the relay on main PBA is working properly replace dispenser If it isn t replace main PBA Step 7 Fan Motor Check if the wire connection is firmly secured Check the resistance of fan motor Resistance approximately 150Ω Resistance approximately 150Ω If it is no...

Page 13: ...ration 6 2 Not Clean If Some Food Particles Remains on Dishes If you have some items with heavier soils use a heavier cycle Select a cycle according to the number and soil level of the dishes Step 2 Too Many Dishes Check if the dishes are improperly loaded Too many dishes have been loaded Rearrange the dishes so they do not interfere with the nozzle rotation and the detergent dispenser s cover ope...

Page 14: ...e position of dishware such as cookie sheets Check for the position of dishware such as cookie sheets cutting boards or large containers etc that maybe blocking the detergent dispenser from opening properly Rearrange the dishes so they do not interfere with the detergent dispenser opening Step 10 Nozzle Check if the spray nozzle is clogged If the pump or spray nozzle is clogged by debris or food r...

Page 15: ...e customers to use rinse agent to remove spots and prevent new film buildup If detergent is old or damp powder detergent advise customers to use fresh detergent Step 2 Hard Water In case of hard water advise customers as followings If water is extremely hard a water softener may be required The harder your water the more detergent a load needs To prevent the common hard water problem of spotting a...

Page 16: ... using it too often could damage your dishwasher Wash and rinse dishes Do not use sanitize option Remove all silverware or metal items Put 2 cups 16 ounces 500 mL white vinegar in a glass or dishwasher safe measuring cup on the bottom rack Run the dishwasher through a complete washing cycle Do not use detergent Vinegar will mix with the wash water ...

Page 17: ...ilm or Etching In case of Silica film or etching silica film is a milky rainbow colored deposit etching is a cloudy film Sometimes there is a water chemical reaction with certain types of glassware This is usually caused by some combination of soft or softened water alkaline washing solutions insufficient rinsing and overloading the dishwasher It might not be possible to prevent the problem except...

Page 18: ... is open Normal Power Key Off 5 5 to 7 0V when the door is open Normal 2V when the door is closed 6 Improper Operation 6 5 Cycle Doesn t Start Normal 2V when the door is closed Step 2 Door Sensing Switch 2 main PBA Check the operation of Door Sensing Switch Remove the connector before measuring Check for the blue wire and the switch connected to the blue wire Normal OPEN when the door is open Norm...

Page 19: ...rror Step 1 Thermistor Check the wiring connection to the thermistor Check for resistance of thermistor The Resistance 25 or 77 approximately 49 12kΩ If the value is not normal replace the thermistor Symptom Step 2 Main PBA ㆍ1E error is displayed Normal Smart Auto LED On Step 2 Main PBA Check for the wire connection on main PBA If there is no defect at the above steps replace main PBA ...

Page 20: ...rmal Delicate Smart Auto LED On Step 1 Water Tap Check for the hot water connections for the inlet valve Adjust the hot water supply so that the temperature of the supplied water is less than 176 80 Check for the wire connection of thermistor Check for resistance of thermistor The Resistance 25 or 77 approximately 49 12kΩ If the value is not normal replace the thermistor Step 3 Main PBA Check for ...

Page 21: ... If water pressure is too low it may cause 4E error Step 2 Water Line Check if water hoses are kinked or not Check if water hoses are blocked by foreign materials Check if there is water leakage at the connection of water valve Step 3 Water Valve Check if the valve is blocked with foreign materials Advise customers to clean the water valve periodically Step 4 Check when water supply is stopped If ...

Page 22: ... checking The Resistance 1 2kΩ If the value is not normal Replace the Water valve Step 5 Assembly Case Brake If the water supply stops after water is supplied for 5 seconds replace the Assembly Case Brake which is including Flow Meter If the value is not normal Replace the Main PBA Step 8 Assembly Case Sensor If the water supply stops after water is supplied fully until the floater in Assembly Cas...

Page 23: ...nsor Check the operation of the Water level sensor If it is faulty replace the assembly case sensor remove foreign material from the float If it is normal replace the Main PBA assembly Step 3 Drain Pump Check the connections at the Drain Pump connector Check the Drain Pump coil is resistance The Resistance approximately 25Ω while operating If the value is not normal replace the Drain pump Step 4 M...

Page 24: ...sensor is detected over 5 seconds during wash operation 7 Error Code 7 5 9E Low Level Water Error Step 1 Water Level Sensor Main PBA Check the connections at the Water level sensor Check the operation of the Water level sensor If it is faulty replace the assembly case sensor and remove foreign material from the float Symptom ㆍ9E error is displayed Normal Heavy Smart Auto LED On If it is normal rep...

Page 25: ... at the Heater connectors Check the resistance between both ends of the Heater directly or check for the resistance between the red wire of the Heater Relay and the amber and yellow wires of the Power Relay respectively The Voltage approximately 13 5Ω If the value is not normal replace heater Step 2 Main PBA Check for the voltage between Main PBA T101 connector and T102 connector The Voltage appro...

Page 26: ...or Code 7 7 LE Leakage Error Symptom ㆍLE error is displayed Heavy LED On Step 1 Shutter Main PBA Check if there is any trace of water leakage in the shutter If there is water leakage trace check for water leakage location and then adjust or replace the parts each hose connection sump tub pump drain If there is no water leakage trace replace the main PBA ...

Page 27: ...800 Symptom ㆍPE error is displayed Step 1 Half Load Motor Check the connections at the Half Load motor connector Reconnect the Half Load motor connector Check for the resistance between both ends of the Motor The Resistance approximately 3 9kΩ If the value is not normal replace the Half Load Motor Step 2 Main PBA If the half load motor is normal replace the Main PBA assembly ...

Page 28: ... over 30 seconds 7 Error Code 7 9 bE Button Error Symptom ㆍbE error is displayed Normal Delicate LED On Step 1 Sub PBA Main PBA Check if there is condensation on the Main PBA connector CN102 If there is no condensation replace the control panel If it is faulty remove any condensation and moisture ...

Page 29: ...Sensor connector Step 2 Water Valve 1 Step 4 Case Sensor Check if there are any traces of water leakage on the top of the Case Sensor Clean the Hose Sensor and the Case Sensor Step 3 Water Valve 2 The voltage at the water valve when it is not operating is AC 120V Check for foreign materials in water valve and remove them If you can t remove replace the water valve If there are no foreign materials...

Page 30: ...Heavy Delicate Smart Auto LED On Step 1 Thermistor Main PBA Check the connections at the thermistor connector Check the resistance between both ends of the thermistor See the table at right Remove the connector before checking If the value is not normal Replace the thermistor Check for the voltage between both ends of the thermistor The Voltage 0 2 4 5V If the value is not normal Replace the main ...

Page 31: ... displayed for the first two seconds and then Software Ver will be indicated You can change the mode by pressing the Normal button again If press the Normal button in this mode the mode will be changed to next mode If you want to activate a mode while operating the dishwasher the door must be closed If LE OE tE error occur enter Service Inspection Mode after resolving it Service Inspection Mode is...

Page 32: ... ...

Page 33: ...Heavy Delicate Smart Auto You can change the mode by pressing the Normal button again If press the Normal button in this mode the mode will be changed to next mode If you want to activate a mode while operating the dishwasher the door must be closed If Heavy LED Heavy Smart Auto LED Heavy Delicate Smart Auto LED error occur enter Service Inspection Mode after resolving it Service Inspection Mode i...

Page 34: ... ...

Page 35: ... the mode by pressing the Normal key Each time the Normal key is pressed the mode changes in the order of t1 t2 t3 t4 t5 t6 t7 t8 If you want to activate a mode while operating the dishwasher the door must be closed The Door switches are ON If an oE LE or tE1 error occur make sure to enter Service Inspection Mode after resolving it Service Inspection Mode is described in the following page Appendi...

Page 36: ... ...

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