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Miele DG 408 Series Technical Information Download Page 35

 

 

Technical Information 

 

 

35 

DG 408x Steam Ovens 

 

Figure 040-5: 

Steam Generator Temperature Regulator and Temperature Limiter 

 

4.4 

Removing the Steam Duct and Seal 

1.  Open the door. 
2.  Remove the steam generator. 
3.  Remove the insert from the steam generator housing. 
4.  Remove the bottom cover from the housing by gently pulling the cover from 

the assembly while using a screwdriver to release the locking tabs, as 
shown in Figure 040-4. 

5.  Remove the two steam duct retaining screws (T10s). See Figure 040-6, Item 1. 

 

Figure 040-6: 

Steam Duct Retaining Screws

 

6.  Remove the steam duct and seal. 

 

Note: 

When re-installing the seal, 
make sure that the notch is 
positioned as shown in 
Figure 040-6, Item 2.

 

Summary of Contents for DG 408 Series

Page 1: ...TECHNICAL INFORMATION DG 408x Steam Ovens 2012 Miele USA ...

Page 2: ...ls 15 4 3 Rear Panel Removal 16 4 4 Fan M2 1 Removal 17 4 5 Removing the Door Contact Switch S24 18 4 6 Upper Air Duct Removal 18 4 7 Fan Wheel Removal 20 020 Door 21 3 Fault Repair 22 3 1 Whistling Sound When Closing the Door 22 4 Service 22 4 1 Door Removal 22 4 2 Installing the Door 23 4 3 Door Disassembly 23 030 Oven Cavity 24 1 Technical Data 25 2 Function 25 2 1 Floor Heater Element 25 2 2 P...

Page 3: ...r 42 3 3 F06 Open Circuit in PT 1000 Temperature Sensor 42 3 4 F20 Heating Fault 42 3 5 F44 Control Electronic Power Electronic Interface is Faulty 44 3 6 Displays Look Different 44 3 7 Wrong Language Setting 44 3 8 Display Dims 44 3 9 Time of Day Shown in 12 Hour Format 24 Hour Format 44 3 10 Cooking Program Does Not Start 45 3 11 Excessive Steam in the Oven Cavity 45 3 12 Cooked Food Is Not Kept...

Page 4: ...ure 040 1 Steam Generator 30 Figure 040 2 Hose Clamp 32 Figure 040 3 Steam Generator Heater Contacts 33 Figure 040 4 Housing Base 34 Figure 040 5 Steam Generator Temperature Regulator and Temperature Limiter 35 Figure 040 6 Steam Duct Retaining Screws 35 Figure 040 7 Removing the Top Cover from the Steam Duct Assembly 36 Figure 040 8 Reed Contact Float 37 Figure 040 9 Steam Generator Present Switc...

Page 5: ...wer must be safely disconnected Even when the appliance is disconnected from power elements may carry voltage A general visual check must be performed at all times A touch current measurement must be conducted on all conductive parts that are not connected to ground Wear protective gloves and use the edge protection mat no 5057680 to prevent cuts by sharp edges B Modification History When Who What...

Page 6: ...er supply hookup System lock during operation X Oven cavity floor heater X Automatic steam reduction X Recipe book X Water tank capacity 1 3L Operational features Standard text display X Recessed controls X Temperature control 104 212 F Automatic shutoff X Fault indication X Door contact switch X Programmable cooking time X Use of residual energy X Steady water level indicator X Warming function X...

Page 7: ... 1 Overview of DG 4080 Front View 1 Door release 2 Control panel 3 Air vent 4 Door seal 5 Steam channel 6 Steam generator with insert 7 Steam generator compartment 8 Steam generator electrical connection 9 Runners 4 10 Steam port 11 Drip channel 12 Floor heater 13 Temperature sensor 14 Vent port ...

Page 8: ...82 Front View 1 Control panel 2 Door release 3 Air vent 4 Door seal 5 Steam channel 6 Steam generator compartment 7 Steam generator with insert 8 Steam generator electrical connection 9 Runners 10 Steam port 11 Drip channel 12 Floor heater 13 Temperature sensor 14 Air vent ...

Page 9: ...lectronic EPL 1K1 1 2K1 1 Steam generator relay not shown K1 3 Floor heater relay not shown K1 5 Fan relay not shown K1 61 Release element relay not shown 7 Z2 Interference suppression capacitor 8 Y56 Release element 9 X2 Socket for power cable 10 X7 Plug strip 11 R30 PT1000 temperature sensor 12 M2 Fan 13 S12 Water level float switch PCB 14 S84 Steam generator present switch 15 1R25 2R25 Steam ge...

Page 10: ...switch 4 2N1 Control selection electronic EW 5 R30 10 PT1000 temperature sensor 6 1N1 Power electronic 7 X2 Power socket 8 Z2 Interference suppression capacitor 9 Y56 Release element 10 X7 Plug strip 11 M2 1 Cooling fan 12 S84 Steam generator switch 13 S12 Water level float switch PCB 14 1R25 2R25 Steam generator heater 15 1F1 1F8 Steam generator temperature regulator 410 F and temperature limiter...

Page 11: ...Technical Information 11 DG 408x Steam Ovens 010 Casing DG 4080 DG 4082 ...

Page 12: ...apor Ducting Figure 010 1 Ducting 1 Steam inlet 2 Oven vent hose 3 Cool air vapor outlet 4 Cool air inlet 5 Release element for steam reduction door opener 6 Steam vent hose During the cooking process fresh steam is pumped into the oven cavity Figure 010 1 Item 1 The generated vapors are pushed out through the vent opening Through a hose at the rear of the oven cavity the vapors move ...

Page 13: ...ays the cooling and leads to a longer coastdown time Coastdown time is not adjustable If steam generator was removed Coastdown takes at least 8 minutes If after the first 8 minutes the interior temperature has not dropped below 113 F 45 C then the coastdown time is extended for an additional 8 minutes until the interior temperature drops below 113 F 45 C If steam generator was not removed Coastdow...

Page 14: ...l the oven cavity temperature is below 45 C In addition if food remains in the oven cavity the cooling off period is delayed and causes a longer coastdown Remedy 1 Remove steam generator and cooked food after a cooking program 2 Leave door open 3 Empty steam generator before inserting it again 3 2 Top Clearance Too Small When Combined with Warming Drawer DG 4080 Symptom When combining the applianc...

Page 15: ...enerator and equipment out of the oven cavity 3 Remove the appliance retaining screws Figure 010 3 Item 1 4 Slide the appliance out of its niche 5 Disconnect the appliance from the power supply Figure 010 3 Appliance Retaining Screws 4 2 Removing the Side Panels 1 Uninstall the appliance See Section 010 4 1 2 Remove the side panel screws see Figure 010 4 Item 1 3 Take off the side panel s ...

Page 16: ...vens Figure 010 4 Side Panel Screws DG 4082 Shown 4 3 Rear Panel Removal 1 Uninstall the appliance See Section 010 4 1 2 Remove the T20 screws securing the rear panel Figure 010 5 Item 1 3 Remove the rear panel Figure 010 5 Rear Panel Screws ...

Page 17: ...lip securing the blower wheel Figure 010 6 Item 2 5 Turn the blower wheel as necessary to permit access to the motor mounting screws Figure 010 6 Fan Screws and C Clip 6 Disconnect hoses Figure 010 7 Item 1 as necessary to access the fan motor from the underside of the air duct 7 Raise the air duct slightly Figure 010 7 Item 2 and take out the fan motor Figure 010 7 Item 3 8 Disconnect all fan con...

Page 18: ...re 010 8 Item 2 5 Remove the switch from its support plate 6 Disconnect the switch connections Figure 010 8 Item 3 Figure 010 8 Door Contact Switch Removal 4 6 Upper Air Duct Removal 1 Take the steam generator and equipment out of the oven cavity 2 Uninstall the appliance See Section 010 4 1 3 Remove the side panels See Section 010 4 2 4 Remove the rear panel See Section 010 4 3 5 Remove four scre...

Page 19: ...l assembly 7 Disconnect plug ST3 from the electronic and remove wiring from the top of the ducting 8 Remove 17 screws Figure 010 10 Item 1 9 Disconnect the hose Figure 010 10 Item 2 Figure 010 10 Upper Air Duct Retaining Screws and Hose 10 Using an appropriate tool slice open the silicone seal Figure 010 11 Item 1 ...

Page 20: ... air duct the silicone has to be replaced to seal the air duct The front lugs on the upper air duct are fragile and break off easily 4 7 Fan Wheel Removal 1 Take the steam generator and equipment out of the oven cavity 2 Uninstall the appliance See Section 010 4 1 3 Remove the side panels See Section 010 4 2 4 Remove the rear panel See Section 010 4 3 5 Remove the upper air duct see Section 010 4 ...

Page 21: ...Technical Information 21 DG 408x Steam Ovens 020 Door DG 4080 DG 4082 ...

Page 22: ...y and slightly increases the pressure when the door is closed Remedy None The appliance is in good working order The whistling sound cannot be eliminated 4 Service 4 1 Door Removal 1 Open the door to the fully open position 2 Flip up the clamp arms on both hinges Figure 020 1 Figure 020 1 Hinge Clamps 3 Slowly close the door until the clamps are touching the frame of the oven interior 4 While hold...

Page 23: ... Phillips screws on the bottom edge of the inner door Figure 020 3 Item 1 4 DG 4082 only Remove 4 Phillips screws from the top of the inner door Figure 020 3 Item 2 5 Take off the inner door 6 Remove the 2 Phillips screws securing the door handle Figure 020 3 Item 3 7 Remove the door handle Figure 020 3 Door Handle Removal Note When assembling the door make sure to carefully position the seal runn...

Page 24: ...Technical Information 24 DG 408x Steam Ovens 030 Oven Cavity DG 4080 DG 4082 ...

Page 25: ... the oven cavity floor and prevents water from condensing and accumulating at the bottom of the oven cavity 2 2 PT 1000 Temperature Sensor R30 or R30 10 The PT 1000 temperature sensor is a printed circuit board PCB which is used to provide the electronic with data to calculate the oven cavity temperature The sensor s resistance increases as the temperature increases Details are listed in Table 030...

Page 26: ...wire from the temperature sensor and the temperature sensor wiring harness from the power electronic See Figure 030 2 Item 1 Remove the temperature sensor from its seal Figure 030 2 Temperature Sensor R30 10 Removal DG 4082 4 2 Removing the Floor Heater Element R28 1 Take the steam generator and equipment out of the oven cavity 2 Uninstall the appliance See Section 010 4 1 ...

Page 27: ... c Remove the inner 7mm retaining nut Figure 030 4 Item 2 d Take off the clip and the heater assembly e Disconnect all electrical connectors to the heater element f Push the heater element into the oven cavity Figure 030 4 Floor Heater Removal DG 4080 6 DG 4082 Cut the cable tie Figure 030 5 Item 1 a Remove the nut securing the ground wire Figure 030 5 Item 2 b Disconnect the ground wire c Take of...

Page 28: ...3 Floor Heater Temperature Regulator 2F1 and Temperature Limiter 2F8 Removal 1 Take the steam generator and equipment out of the oven cavity 2 Uninstall the appliance See Section 010 4 1 3 Tip the appliance onto its back 4 Using a pair of cutters remove the cover from the base Figure 030 3 5 Remove the 7 millimeter nut securing the ground wire Figure 030 4 Item 1 6 Disconnect the ground wire 7 Tak...

Page 29: ...Technical Information 29 DG 408x Steam Ovens 040 Water Tank ...

Page 30: ... Steam Generator Data 1 Depends on distributor 2 Function 2 1 Steam Generation Figure 040 1 Steam Generator 2 1 1 Construction The insert divides the steam generator into an inner chamber Figure 040 1 Item 1 and an outer chamber Figure 040 1 Item 2 Both chambers are connected by an opening The steam generator is equipped with dual heater 1 Inner chamber 2 Outer chamber 3 Float 3a Magnet 4 Water le...

Page 31: ... float switch registers a sufficient quantity of water is present within the steam generator Figure 040 1 Item 4 The oven door is closed During the heating up phase generally both heater circuits are activated In the maintenance phase after the required temperature has been reached only one heater circuit is cycled on off to maintain the oven cavity temperature If the temperature drops below a cer...

Page 32: ... 1 is positioned on the middle of the hose Figure 040 2 Hose Clamp Cause No error The hose clamp serves as kink prevention The hose clamp prevents kinks that get into the hose at this point which would reduce the diameter of the hose The clamp is not meant to keep the hose in place Remedy None Leave the hose clamp in its position 3 5 Steam Generator is Discolored Symptom Steam generator and insert...

Page 33: ...40 3 If the measured value is approximately 100Ω the heater element is in good condition 2 Heater element 2R25 Using an ohmmeter measure the resistance between contact points 1 and 3 Figure 040 3 If the measured value is approximately 50Ω the heater element is in good condition 3 Heater elements 1R25 and 2R25 Using an ohmmeter measure the resistance between contact points 1 and 2 Figure 040 3 If t...

Page 34: ...tor Temperature Regulator 1F1 and Temperature Limiter 1F8 1 Open the door 2 Remove the steam generator 3 Remove the insert from the steam generator housing 4 Remove the bottom cover from the housing by gently pulling the cover from the assembly while using a screwdriver to release the locking tabs as shown in Figure 040 4 Figure 040 4 Housing Base Caution Do NOT pry the bottom cover off It can be ...

Page 35: ... generator housing 4 Remove the bottom cover from the housing by gently pulling the cover from the assembly while using a screwdriver to release the locking tabs as shown in Figure 040 4 5 Remove the two steam duct retaining screws T10s See Figure 040 6 Item 1 Figure 040 6 Steam Duct Retaining Screws 6 Remove the steam duct and seal Note When re installing the seal make sure that the notch is posi...

Page 36: ...remove 7 Slide the new float into the track Ensure that the float can move freely through the track Reassembly 1 Hold the top cover upside down 2 Install and hold the top cover spring clips in position and slide the steam duct assembly into the cover 3 Reposition the steam duct assembly and slide it into the cover track 4 Re install the retaining screw Figure 040 7 Item 1 Figure 040 7 Removing the...

Page 37: ...ull the retaining tabs back to access the switch Figure 040 9 Item 1 and slide the switch out 5 Disconnect all switch connections Figure 040 9 Steam Generator Present Switch 4 8 Removing the Steam Generator Socket 1 Take the steam generator and equipment out of the oven cavity 2 Uninstall the appliance See Section 010 4 1 3 Remove the right side panel See Section 010 4 2 4 Remove the retaining pla...

Page 38: ...Technical Information 38 DG 408x Steam Ovens 060 Fascia Electronics DG 4080 DG 4082 ...

Page 39: ...unction 2 1 Optical Interface The appliance has an optical interface to support diagnosis See Figure 060 1 Item 1 The interface can be located with the Find Optical Interface function of the Miele diagnostic support MDU Figure 060 1 Optical Interface ...

Page 40: ...Technical Information 40 DG 408x Steam Ovens 2 2 Electronics Overview 2 2 1 Main Electronic Figure 060 2 EPL700 Electronic Overview DG 4080 Shown ...

Page 41: ...matically when the door is opened The factory setting is Off for DG 4080 and On for DG 4082 2 4 Power Management Starting with ID795 the electronic is equipped with a power management feature If this feature is enabled the oven floor heater will not be activated during the heating up phase and only one steam generator element will be used during operation The factory setting is Off 2 5 Descaling D...

Page 42: ...e See Section 060 3 5 Table 060 1 Fault Codes 3 2 F05 Short Circuit in PT 1000 Temperature Sensor Cause PT 1000 temperature sensor R30 or connector short circuited Remedy Replace the temperature sensor See Section 030 4 1 3 3 F06 Open Circuit in PT 1000 Temperature Sensor Cause PT 1000 temperature sensor R30 or connector open circuited Remedy Replace the temperature sensor See Section 030 4 1 Caus...

Page 43: ...l Re fit it if necessary Cause Water being used is extremely cold Remedy Use water at room temperature Cause Heavy mineral deposits Remedy Descale appliance See the operating instructions Cause Float for monitoring water level is jammed Safety cutoff after 38 minutes straight heating time Remedy Check float and guide at the insulated part of the steam generator Replace float or steam generator ins...

Page 44: ... Different Symptom The displays of different appliances with Navitronic controls H 4000 H 4000 BM DG 4000 have a different appearance Cause Different angles of view units next to each other or one above the other different light reflection Remedy Use the Brightness and Contrast functions to adjust the displays see Section 060 4 1 3 7 Wrong Language Setting Cause Several languages are available Rem...

Page 45: ...ing function has been shut off Remedy Turn on the warming function refer to Section 060 4 1 Cause Steam reduction has been shut off Warming is not possible while steam reduction is shut off Remedy Turn on steam reduction refer to Section 060 4 1 Check if warming is turned on see Section 060 4 1 3 13 Recommended Temperatures Are Changed Cause Recommended temperatures can be programmed Remedy See Se...

Page 46: ...Programming Mode Initial requirements Shut off the appliance Accessing Note Access has to be completed with 10 seconds 1 Touch and hold the Timer pad for DG 4082 or the Clear pad for DG 4080 2 Touch and hold the On pad 3 Release the Timer Clear and On pads at the same time 4 Touch the Timer Clear pad five times and hold on the fifth time until the programming mode appears Acknowledgement indicator...

Page 47: ...the appliance is shut off On Off When the appliance is shut off the display remains dark RECOMMENDED TEMP or TEMPERATURES 1 CUSTOM 105 F 212 F 212 F CANNING 175 F 212 F 212 F REHEAT 175 F 212 F 212 F DEFROST 125 F 140 F 140 F TEMPERATURE 1 F F C WATER HARDNESS 1 DG 4080 only Level 1 ppm Touch pad next to Softer or Harder until the desired level is indicated Level 4 Level 2 ppm Level 3 ppm Level 4 ...

Page 48: ...rt Long The buzzer sounds for 1 hour DISPLAY 1 Brightness 1 5 4 Contrast 1 5 4 START SETTINGS 1 Automatic start The cooking cycle starts automatically Automatic start Manual start The cooking cycle has to be confirmed manually SYSTEM LOCK 1 Accept The appliance can be safeguarded against accidental operation Do not accept Do not accept The appliance cannot be safeguarded against accidental operati...

Page 49: ...n interrupt the program Back without saving Touch the Timer Clear pad Save and back Touch the pad next to OK Quit Touch the Off pad 4 2 Service Mode Initial requirements Shut off the appliance Accessing Note Access must be completed with 10 seconds 1 Touch and hold the Timer pad for DG 4082 or the Clear pad for DG 4080 2 Touch and hold the On pad 3 Release the Timer Clear and On pads at the same t...

Page 50: ...a a metal rod which opens the door a crack Off The door closes again slowly BUZZER On The buzzer sounds Off The buzzer goes silent DISPLAY The display alternately lights up and goes dark SENSOR TEST STEAM GENERATOR CONTACT or STEAM GENERATOR CONTROL Closed Steam generator is inserted The steam generator switch S84 is switched on Open Steam generator is not inserted LEVEL INDICATOR or FILL INDICATO...

Page 51: ...e both side covers See Section 010 4 2 4 Remove screws of fascia panel Figure 060 4 Item 1 left and right 5 Disconnect wiring and ground lead 6 Take off fascia panel with support plate 7 Remove screws from support plate Figure 060 4 Items 2 and 3 8 Separate fascia panel from support plate Figure 060 4 Fascia Panel Assembly DG 4080 9 Disconnect connections from the control and display electronics 1...

Page 52: ...1 Take the steam generator and equipment out of the oven cavity 2 Uninstall the appliance See Section 010 4 1 3 Remove the four T20 screws securing the fascia panel Figure 060 6 Item 1 left and right 4 Loosen the four T20 screws securing the control electronic mounting bracket to the fascia panel see arrows Figure 060 6 left and right 5 Remove the fascia panel partway Figure 060 6 Item 2 Figure 06...

Page 53: ...See Section 010 4 1 2 Remove the fascia panel See Section 060 4 4 3 Disconnect all control electronic connections two wiring harnesses and one ground wire 4 Unclip and remove the control electronic from its mounting bracket See Figure 060 7 Figure 060 7 Removing the Control Electronic DG 4082 4 5 Removing the Selection Electronic Note The fascia panel is firmly attached to the selection electronic...

Page 54: ...ber of the Control Electronic 2N1 is indicated OUTPUT ELECTRONIC e g EPL 700 ID00796 The ID number of the Output Electronic 3N1 is indicated FAULT MEMORY e g Fault 01 All faults registered so far are indicated Delete faults All saved faults are deleted FUNCTION TEST HEATING CIRCUIT 1 On The steam generator heater 1R25 is switched on Off The steam generator heater 1R25 is switched off FUNCTION TEST...

Page 55: ...ot filled SENSOR TEST DOOR SWITCH Closed The door is closed The door contact switch S4 is switched on Open The door is open SENSOR TEST PT 1000 OVEN CAVITY e g 81 F The temperature at temperature sensor PT 1000 R30 is indicated SENSOR TEST FUNCTION PAD PANEL All function pads with the exception of Clear and Off can be checked by touch RUNNING TIME HEATING CIRCUIT 1 e g 0008h The operating hours of...

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