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【转载】电磁炉故障检测与排除  

2014-08-08 07:24:07|  分类: 转载 |  标签: |举报 |字号 订阅

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本文转载自shanxishaoqian《电磁炉故障检测与排除》

 

一:故障代码表

故障               代码              声音                                                             备   注

无锅                E1                每隔3秒一声短                                             5秒后进入待机状态

电压过低         E2               每隔3秒一声短                                                 5秒后进入待机状态

电压过高         E3               每隔3秒一声短                                                   5秒后进入待机状态

干烧保护         E4                每隔3秒一声短                                                   5 秒后进入待机状态

IGBT超温        E5                5秒后进入待玑状态                                           5秒后进入待机状态

TH1(锅底RT)   E6                                                                                             不能开机

   开路

TH2开路

(IGBT,RT)      E7                                                                                                 不能开机

电流过大       E0                                                                                                     不能开机

   定时结束                                                                                                               立即关机

保温状态                                                                                                                  间歇工作

说明:代码只适用于数显机型,非数显型只有声音报知及指示灯.

二:主板检测   标准

   由于电磁炉工作时,主回路工作在高压大电流状态中,所以对电路检查时必须将线盘(L1)断开不接,否则极容易在测试时因仪器接入而改变电路参数造成机器损坏.接上线盘试机前,应根据2.1<<主板检测表>>对主板各点作测试合格后才进行试机.

2.1:主板检测表

(一);待机(静态)检测表(不接线盘,接入电源后,不按任何键)

   步 骤           测   试   点                  标    准                  备    注                                 不 合 格 对 策

   1                  通电                             发出"B"一声                                                        按2.2第(1)项査

    2                 CN7                              +300V                   电源AC220V时                     按2.2第(2)项査

    3                 +18V                           +18V                                                                   按2.2第(3)项査

     4                  +5V                              +5V                                                                   按2.2第(4)项査

     5                 Q3G极(风扇管)             <0.5V                                                                 按2.2第6 5)项査

     6                  IGBTG极                      <0.12V                                                               按2.2第(6)项査

    7                  B点(`VAC检测)            + 2.0V                      确认电源220V时                   按2.2第(7)项查

     8                V3(同步电路左侧)         + 1.72V                    确认电源220V时                按2.2笫(8)项查

    9                 V4(同步输入右侧)        +1.71V                    在C3並一只1M电阻               按2.2第(9)项查

    10                Q5G极(浪涌电压)         +0,3V                     在C3並一只1M电阻              按2.2第(10)项查

   (二)动态检测表(不接入线盘,接入电源后,按开机键)

    步   骤              测 试 点                   标 准                     备    注                               不 合 格 对 策

   13                    IGBTG极                间滆出现1_2.5V        此为加至IGBT                     按2.2第(13)(14)

                                                          触发昹冲                    G极试探信号                      (15)项査

    14                   CN6(FAN)               +12V                         风扇应转动                          按2.2第(16)项查

   

    (三):主板CPU,LM339检测表

      CPU

     引脚                  功 能 说 明                                            待 机 电 压 (V)                  工 作 电 圧(V)

      1                      键盘信号输入                                               5.1                                       5.1

        2                    蜂鸣/ 风扇信号                                             5.1                                       0.8

       3                    开/关机埪制                                                  0.3                                       5,1

        4                    位选信号                                                        0.02                                      1.4

        5                     IGBT温度检测信号                                       4.8                                       0.7

        6                    电流/锅具检测信号                                         0.15                                    2,4

        7                    市电电压检测信号                                           1.9                                      1.9

        8                    炉面温度检测信号                                           0.2                                      0.2

        9                   接地                                                                 0                                            0

        10                 PWM信号输出                                                  5.1                                        5.1

        11                  复位                                                                 5.1                                       5.1

        12                  MCU电源(+5V)                                                  5.1                                         5.1

        13                   外接晶振                                                          2.6                                        2.6

        14                    外接晶振                                                         2.6                                      2.6

       15                    位选信号                                                         0.02                                   1.4

       16                    位选信号                                                         0.02                                    1.4

        17                    过零检测                                                           5.0                                      5.0

       18                    时钟信号                                                          4.6                                      5.0

 

 

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