| E1:点火故障 E2:过热保护 E3:风压开关故障 H2O:采暖系统低水压故障 E5:采暖温度传感器故障 E6:卫生热水温度传感器故障 E17:调节故障 E18:循环不足 E21:电路板故障 E22:参数编程故障 E35:火焰感应电极故障 E40:电源故障 |
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