BSH HN678G4S1, Repair Instructions, Page: 2 / 181

Repair Instructions – Cooking
2016-03-10 / DIS 184_58300000140186_ara_en_k Copyright by BSH Hausgeräte GmbH Page 2 of 181
Cooling fan motor whistles at a high frequency at certain speeds............... 54
Cooling fan overrun too loud........................................................................54
4.4 Other faults (surface defects, cracks, breaks)........................................ 56
Rails discoloured after pyrolysis...................................................................56
Baking tray/universal pan do not fit on the rails...........................................56
Control panel and/or door askew................................................................. 56
Difference in display colour/brightness.........................................................56
Difference in colour of microwave/oven turning handle................................56
Gap between panel and door varies............................................................57
Connecting sleeve of the cooking compartment seal is becoming frayed
...................................................................................................................... 57
4.5 Leaks............................................................................................................ 58
Steam escapes in the top right-hand corner................................................ 58
Water drips onto the floor/furniture (when the door is opened).................... 59
Vapour/condensation escapes......................................................................59
5 Test 60
5.1 Measure the distance between the front glass panel and the cabinet
cavity............................................................................................................. 60
5.2 Checking the alignment of the panel with the door......................................61
5.3 Checking the cooking sensor (Lambda sensor)...........................................63
5.4 Check the ventilation of the appliance in the furniture................................. 64
5.5 Check the meat temperature probe (NTC)...................................................66
5.6 Checking the lighting in the cooking compartment.......................................69
5.7 Check the cooking compartment temperature sensor (PT1000)..................71
5.8 Check the cooking compartment temperature sensor (PT500)....................74
5.9 Checking condensation................................................................................ 77
5.10 Magnetron prüfen......................................................................................... 79
5.11 Measuring microwave output power.............................................................81
5.12 Checking that the cookware is suitable for microwave use..........................82
5.13 Neo-Inverter prüfen.......................................................................................83
5.14 Checking the position of the wall socket......................................................86
5.15 Checking the socket of the meat temperature sensor..................................87
5.16 Measuring the temperature of the operating surfaces for hot air at
220 °C........................................................................................................... 88
5.17 Measuring the temperature of the operating surfaces for pyrolysis level
3.................................................................................................................... 90
5.18 Measuring the temperature of the operating surfaces for grilling level 3...... 92
5.19 Measuring the temperature of the appliance surfaces for hot air at
200 °C........................................................................................................... 94
5.20 Measuring the temperature of the appliance surfaces for pyrolysis level
3.................................................................................................................... 97
5.21 Measuring the temperature of the furniture surfaces for hot air at
220 °C......................................................................................................... 100
5.22 Measuring the temperature of the furniture surfaces for pyrolysis with level
3.................................................................................................................. 102
5.23 Measuring the temperature in the cooking compartment for hot air at
200 °C......................................................................................................... 104
5.24 Measuring the temperature in the cooking compartment for pyrolysis level
1.................................................................................................................. 106
5.25 Check the heat-resistance of the fitted units..............................................108
5.26 Checking the vapour system......................................................................109
6 Repairs 111
6.1 Remove the Lambda sensor on the Lambda module................................ 111
6.2 Removing and installing the baking sensor module (Lambda module)...... 112
6.3 Removing and installing the fascia (swivelling panel)................................ 113
6.4 Installing and removing the control panel...................................................114
6.5 Removing and installing the control power module....................................115
6.6 Removing and installing the steam generator............................................116
6.7 Removing and installing the steam generator............................................117
6.8 Flashing and coding................................................................................... 118
6.9 Removing and installing the interior light (roof)..........................................120
6.10 Install and remove cabinet upper section...................................................121
6.11 Installing and removing the cabinet back panel......................................... 122
6.12 Installing and removing the cabinet side panel (left)..................................123
6.13 Installing and removing the cabinet side panel (right)................................124
6.14 Remove and install the appliance.............................................................. 125
6.15 Removing and installing the hot-air fan......................................................126