Hand dryers-a fault awm fo thin .

Fault Phenomenon 1: I kut chu boruak lum chhuahnaah dah la, boruak lum a puak chhuak lo, boruak lum chauh a puak chhuak.
Analysis and Maintenance: Cold air a puak chhuak a nih chuan hair dryer motor chu power leh working a ni tihna a ni a, infrared detection leh control circuit te chu a normal tihna a ni. Thli lum chauh a awm chuan heater a chhe emaw, wiring a lo chhuak emaw tihna a ni. Inspection zawhah heater wiring a lo chhuak tih hmuhchhuah a ni. Reconnection a nih hnuah boruak lum a puak chhuak a, fault chu a bo ta a ni.
Fault Phenomenon 2: Power on hnuah. Kut chu boruak lum chhuahnaah dah a ni lo. Thli lum chu thunun theih lohvin a puak chhuak thin.
Analysis and Maintenance: A enfiah hnuah thyristor hian breakdown phenomenon a nei lo. Photoelectric coupler 1 leh 4 pin chhunga photoelectic tube chu a leak a, a chhe vek niin rinhlelh a ni. Photoelectric coupler a thlak hnuah hna chu a normal leh a, fault chu a bo ta a ni.
Fault Phenomenon 3: I kut chu boruak lum chhuahnaah dah la, boruak lum a puak chhuak lo.
Analysis and Repair: Fan leh heater chu a normal em tih enfiah la, thyristor gate chuan trigger voltage a nei lo a, control transistor VI-a C pole chuan rectangular wave signal output a nei bawk. Photoelectric coupler hi a chhe hle niin rinhlelh a ni. Multimeter RXL0 block hman a nih chuan photoelectric coupler 1 leh 4 pin inkar forward leh reverse resistance te chu a tawp lo. Forward resistance chu normal condition-ah chuan m engemaw zat a ni tur a ni a, reverse resistance pawh a tawp lo. Internal photosensitive tube chu a inhawng tih hriat a ni a, chu chuan thyristor gate chu trigger voltage a hmu lo va, a conduct thei lo a ni. Photoelectric coupler a thlak hnuah fault chu a bo ta a ni.