Remote control is normal, that the problem is in the panel. Since the other button panel is normal, fault should be in the box button itself and its circuit. XMmservice manual download site
 XMmservice manual download site
 XMmservice manual download site
Measured with Rxl block in and out of the box key, micro switch pin and press the button, whose hands not deflection. Break panel, press the push rod on the micro switch directly, the clock still not deflection, show that the micro switch is damaged. Replace a with the specifications of the micro switch, troubleshooting.XMmservice manual download site