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WPM Welhome咖啡機20大常見故障與專業保養知識

20 Common WPM Welhome Coffee Machine Faults & Maintenance Guide

• 1.濾杯卡住拔不出｜沖煮組卡死故障故障成因：沖煮頭水垢堆積、膠圈膨脹、濾餅過壓；保養：每次使用清空濾餅，每週拆解清洗沖煮膠圈，3個月深度除水垢
• 2.萃取出水細、水流斷斷續續故障成因：分水網堵塞、水路水垢、水泵壓力不足；保養：每日沖洗分水網，每月全水路除鈣
• 3.沖煮頭底部長期漏水故障成因：沖煮頭膠圈老化、分水網變形；保養：6-12個月更換沖煮密封膠圈
• 4.加熱速度慢、咖啡萃取溫度偏低故障成因：加熱管厚水垢、溫控探頭失準；保養：避免硬水長時間使用，定期除垢
• 5.鍋爐運轉噪音大、機身強烈震動故障成因：水泵進氣、鍋爐積垢、底墊老化；保養：水箱保持充足水量，半年清潔鍋爐內膽
• 6.蒸汽棒無蒸汽、出氣量微弱故障成因：蒸汽微孔奶垢堵塞、蒸汽閥水垢；保養：每次打奶後立刻沖洗蒸汽棒，每日拆解蒸汽嘴疏通
• 7.關閉蒸汽閥後蒸汽棒仍持續滴水故障成因：蒸汽閥密封墊老化卡滯；保養：每3個月拆解潤滑蒸汽閥
• 8.水泵不停抽水、持續運轉無法停止故障成因：水位浮球開關故障、進水閥卡雜質；保養：每月檢查水箱浮球，過濾水中雜質
• 9.面板按鈕失靈、觸控毫無反應故障成因：水汽奶漬氧化主板接點；保養：清潔機身避開面板，不直接噴水沖面板
• 10.萃取壓力異常偏高或偏低，咖啡口感差故障成因：壓力表失準、分水網堵塞；保養：每季校準標準9bar萃取壓力
• 11.機身底部大面積漏水、地面積水故障成因：軟管老化滲漏、鍋爐銹蝕；保養：每月檢查內部水管接頭
• 12.沖煮咖啡帶金屬異味、雜味濃重故障成因：水路水垢發黴氧化；保養：每2個月專用藥劑循環清洗全水路
• 13.奶泡粗糙無法綿密，拉花失敗故障成因：蒸汽嘴堵塞、鍋爐溫度不足；保養：每次使用完擦拭疏通蒸汽微孔
• 14.開機故障燈閃爍、機器自動報警故障成因：溫控/水位/壓力感應器損壞；保養：減少頻繁斷電重啟
• 15.缺水提示亂跳，水箱滿水仍報缺水故障成因：浮球水垢黏連卡滯；保養：每週取出浮球清水刷洗
• 16.萃取完咖啡殘留水流排出極慢故障成因：分水網濾孔油脂堵塞；保養：每日沖煮頭反沖清潔
• 17.機外殼異常發熱、觸摸燙手故障成因：散熱風扇損壞、通風口堵塞；保養：每月清理散熱口，機體兩側留通風空間
• 18.濾碗油垢固化，咖啡殘留難清理故障成因：長期未執行反沖保養；保養：每日咖啡清潔粉反沖沖煮頭
• 19.開機完全不加熱、鍋爐恆溫失效故障成因：加熱絲斷裂、溫控保險熔斷；保養：禁止空機長時間持續加熱
• 20.機內產生黴味、水路滋生細菌故障成因：內部殘水長期積存；保養：每日用完排空積水，每週深度拆洗沖煮組

• 1. Portafilter stuck & cannot be pulled outCause: Limescale buildup, swollen group gasket, over compacted coffee puck. Maintenance: Empty puck after every shot, clean gasket weekly, descale every 3 months
• 2. Weak & intermittent brew water flowCause: Clogged shower screen, limescale inside pipeline, low pump pressure. Maintenance: Rinse shower screen daily, full descale monthly
• 3. Constant leaking from group head bottomCause: Worn group gasket, deformed shower screen. Maintenance: Replace gasket every 6-12 months
• 4. Slow heating & low brew temperatureCause: Thick limescale on heating tube, faulty temperature probe. Maintenance: Avoid hard water, regular descaling
• 5. Loud boiler noise & heavy vibrationCause: Air trapped in pump, limescale inside boiler, worn foot pad. Maintenance: Keep water tank full, clean boiler interior every 6 months
• 6. No steam or weak steam outputCause: Milk residue clog steam holes, limescale on steam valve. Maintenance: Rinse wand immediately after steaming, disassemble nozzle daily
• 7. Steam wand drips after closing valveCause: Worn steam valve seal stuck by scale. Maintenance: Disassemble & lubricate valve every 3 months
• 8. Water pump runs nonstopCause: Faulty float switch, debris stuck inlet valve. Maintenance: Inspect float monthly, filter water impurities
• 9. Unresponsive control panel buttonsCause: Oxidized circuit board from milk vapor. Maintenance: Do not spray water directly on panel
• 10. Abnormal high/low extraction pressureCause: Broken pressure gauge, clogged screen. Maintenance: Calibrate to standard 9 bar quarterly
• 11. Severe water leakage under machineCause: Aged internal hose, corroded boiler. Maintenance: Check pipe connections monthly
• 12. Metallic strange taste from coffeeCause: Mold & limescale inside water circuit. Maintenance: Full chemical cleaning every 2 months
• 13. Rough foam unable to latte artCause: Blocked steam nozzle, low boiler temp. Maintenance: Clear steam holes after every use
• 14. Alarm & flashing error indicator lightCause: Damaged temperature/water/pressure sensor. Maintenance: Avoid frequent power cycle
• 15. False low water alert with full tankCause: Float stuck by limescale. Maintenance: Wash float weekly
• 16. Very slow draining after extractionCause: Grease clogged shower screen. Maintenance: Backflush group head daily
• 17. Overheating hot machine casingCause: Broken cooling fan, blocked vent. Maintenance: Clean air vent monthly, reserve ventilation space
• 18. Solid grease stuck inside portafilter basketCause: No regular backflush. Maintenance: Backflush with coffee cleaner powder daily
• 19. No heating after power onCause: Burned heating element, blown thermal fuse. Maintenance: Do not run empty machine heating long time
• 20. Moldy odor inside machineCause: Stagnant residual water. Maintenance: Drain leftover water daily, deep disassemble clean weekly

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