保险管是否容断：如保险管容断，保险管座小红灯会亮起。(图7右)。
Check the fuse whether is broken or damage: if the fuse damaged, then the small red lamp of the fuse will be light (with the picture 7 right).
到达所需温度后红灯会熄灭，待温度下降时红灯会自动亮起加温。
The red light will turn off, when the temperature decreasing, the red light will heat automatically.
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