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7.3. Troubleshooting of inverter circuit (U) and magnetron
This oven is programmed with a self diagnostics failure code system which will help for troubleshooting. H95, H97, H98 and H99
are the provided failure codes to indicate magnetron and inverter circuit problem areas. This section explains failure codes of H95,
H97, H98 and H99. First, you must program the DPC into TEST MODE, For SD452W model: press Clock
button once → press
Timer
button once → press Start button once → press 1000W/600W button once, For ST462M & ST452W model: press
Timer
pad twice → press Start pad once → press Micro Power pad once. Program unit for operation. H95, H97, H98, H99
appears in display window a short time after [Start] pad is pressed and there is no microwave oscillation.
Alternate way to troubleshoot oven with AC Ampere meter used
H95, H97, H98, H99 appears in display window a short time after [Start] button is pressed and no microwave oscillation with AC
Ampere meter used for troubleshooting.
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NN-SD452W / NN-ST462M / NN-ST452W