4.3. Troubleshooting of inverter circuit (U) and magnetron NEW H.V.
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, press Timer/Clock 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 key 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 key is pressed and no microwave oscillation with AC Ampere
meter used for troubleshooting.
11
NN-ST657S / NN-ST677M / NN-ST667W / NN-ST657W
Summary of Contents for NN-ST657S
Page 2: ...2 NN ST657S NN ST677M NN ST667W NN ST657W ...
Page 3: ...3 NN ST657S NN ST677M NN ST667W NN ST657W ...
Page 5: ...1 SCHEMATIC DIAGRAM 5 NN ST657S NN ST677M NN ST667W NN ST657W ...
Page 15: ...5 EXPLODED VIEW AND PARTS LIST 5 1 EXPLODED VIEW 15 NN ST657S NN ST677M NN ST667W NN ST657W ...
Page 23: ...6 DIGITAL PROGRAMMER CIRCUIT 6 1 NN ST657S ST657W 23 NN ST657S NN ST677M NN ST667W NN ST657W ...
Page 24: ...24 NN ST657S NN ST677M NN ST667W NN ST657W ...
Page 25: ...6 2 NN ST677M ST667W 25 NN ST657S NN ST677M NN ST667W NN ST657W ...
