故障現象：

通電無燈光、無蜂鳴、風扇不啟動

Symptom:

No light, no beep, fan cannot start after power on

原因分析：

插座斷電 / 插頭鬆脫、機內保險絲熔斷、電源線斷路、主控板供電電容擊穿、地線漏電保護跳閘

Cause:

Dead socket, loose plug, blown fuse, broken power cable, burnt mainboard capacitor, earth leakage tripped

用戶自檢方法：

換插座測試；檢查全屋廚電空氣開關；拆開機頂接線盒看電源線有無發黑斷線

Self-Check:

Test other socket; check kitchen circuit breaker; open top terminal box to inspect burnt cable

維修更換零件：

電源線、保險管、主控電路板、降壓電容

Replacement Parts:

Power cable, fuse tube, main control board, step-down capacitor

故障現象：

觸控無回饋、按鍵錯亂、只有某一檔能用、螢幕不亮

Symptom:

No touch feedback, button disorder, single speed only, blank display

原因分析：

面板油污滲入短路、觸控晶片損壞、排線鬆脫氧化、電壓衝擊燒壞觸控板

Cause:

Grease short circuit, broken touch IC, loose oxidized cable, surge damaged touch panel

用戶自檢方法：

用酒精徹底擦拭面板油污；斷電靜置5分鐘復位；重新插緊內部排線

Self-Check:

Wipe panel with alcohol; power off 5 mins reset; reinsert internal flat cable

維修更換零件：

觸控面板總成、排線、主控板

Replacement Parts:

Touch panel assembly, flat cable, main control board

故障現象：

按鍵通電有聲，電機悶響，扇葉卡死不動

Symptom:

Power on with hum sound, fan blade stuck completely

原因分析：

啟動電容容量衰減擊穿、電機軸承油污卡死、風輪纏保鮮膜 / 鋼絲球異物、電機繞組開路

Cause:

Degraded start capacitor, greasy stuck bearing, foreign object wrapped impeller, open motor winding

用戶自檢方法：

斷電手動撥動風輪，卡頓 = 異物 / 軸承；順滑則電容損壞

Self-Check:

Manually spin impeller after power off; stuck = bearing/foreign object, smooth = broken capacitor

維修更換零件：

電機啟動電容、風機電機總成

Replacement Parts:

Fan start capacitor, blower motor assembly