3C. Fault Finding ..................................................................................................................................................................... 93
Error code list ................................................................................................................................................................................ 93
3D. Tests ................................................................................................................................................................................... 95
Test types ...................................................................................................................................................................................... 95
Equipment required for tests ........................................................................................................................................................ 95
Testing selected components (casing mounted) ........................................................................................................................... 96
Microwave Leakage test ................................................................................................................................................................ 97
Temperature Control test: measuring the cavity temperature ..................................................................................................... 99
Recommission test ...................................................................................................................................................................... 101
Commissioning the oven after service/repair/testing ................................................................................................................. 102
High voltage components (casing removed) ............................................................................................................................... 103
Mains voltage components (casing removed) ............................................................................................................................. 105
3E. Firmware updates ........................................................................................................................................................... 107
Procedures to load USB sticks and download to appliance ......................................................................................................... 107
3F. Replacing components .................................................................................................................................................. 116
Safe working when replacing appliance parts ............................................................................................................................. 116
Overview of parts ........................................................................................................................................................................ 118
Removing / fitting the casing ....................................................................................................................................................... 120
Removing / fitting the door assembly and door seal ................................................................................................................... 121
Replacing a magnetron ................................................................................................................................................................ 124
Replacing the cooling fan ............................................................................................................................................................ 127
Replacing the QTS (Quick Touch Screen) assembly ..................................................................................................................... 128
Replacing the SRB (Smart Relay Board) ....................................................................................................................................... 130
Replacing the touchscreen overlay .............................................................................................................................................. 131
Adjusting the door microswitches ............................................................................................................................................... 132
Replacing the impinger plate ....................................................................................................................................................... 134
Replacing the stirrer .................................................................................................................................................................... 135
Replacing the stirrer motor ......................................................................................................................................................... 137
Replacing the convection fan motor and heating element ......................................................................................................... 138
Replacing a transformer (high voltage) ....................................................................................................................................... 140
Replacing the convection fan motor speed controller ................................................................................................................ 142
Overview of further components ................................................................................................................................................ 143
3G. Circuit boards and diagrams ......................................................................................................................................... 145
QTS circuit board assembly ......................................................................................................................................................... 145
SRB circuit board ......................................................................................................................................................................... 146
Circuit diagrams ........................................................................................................................................................................... 147
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