| 摘要 |
PROBLEM TO BE SOLVED: To prevent cooking operation from being made by a heating means while a user does not notice. SOLUTION: When a power switch 10 is turned on, a control circuit 25 sets the potential of an input terminal 29 to a low level and turns on a power supply display lamp 11. At this time, control circuit 25 detects a voltage at a point P1 via a voltage detection line 31, and compares the detection voltage with a preset setting value to judge whether the power supply display lamp 11 is normal, short-circuited, or disconnected. When it is judged that the power supply display lamp 11 is short-circuited or disconnected (has failed), a switching element 21 is turned off to prevent heating operation from being made by a heating coil 7. |
