A: Usually caused by burnt power board, blown fuse or wall socket fault. Check wall outlet first. If power supply is normal but unit dead, technician needs to inspect & replace main power board. On‑site service available across Hong Kong.

A: Refrigerant gas leak or cooling pipe leakage is common. Do not keep running the unit. Technician will perform leak test, vacuum and refrigerant recharge. On‑site service for Kwun Tong, Kowloon, New Territories.

A: E1 means defective temperature sensor. Wrong reading causes temperature control failure. On‑site replacement of temperature sensor is available.

A: LL is low‑temperature alarm. Usually shorted temperature sensor or main board signal fault. Unit over‑cools with heavy frost. Need wiring inspection & component replacement.

A: HH = high internal temperature. Causes: bad door seal, broken fan, dusty condenser, compressor fault. Check door closed tightly. If alarm persists book on‑site repair.

A: Most common fault: internal circulation fan motor failure. Cold air cannot circulate to second zone. Fan assembly can be replaced on‑site.

A: Sources: worn fan motor, aged compressor rubber mounts, pipe collision. Check unit level. Persistent noise requires fan replacement or compressor anti‑vibration adjustment.

A: Blocked drain hole or worn door gasket causes condensation & dripping. Clean drain hole first. Replace door seal gasket if aged.

A: Usually ageing compressor start capacitor, unstable power output causes intermittent running. Replace start capacitor to resolve most cases.

A: Defrost system fault, defective defrost sensor or bad door seal letting moisture inside. Heavy frost blocks cooling. Need inspection for defrost sensor & main control board.

A: Burnt‑out circulation fan motor. Compressor runs but cold air cannot circulate, slow temperature drop. Fan assembly replacement on‑site available.

A: Defective display panel or loose main‑board wiring. Temperature value jumps, cannot set temperature normally. Need wiring check, replace display board or main circuit board.

A: Built‑in model common fault: insufficient ventilation space, blocked heat dissipation causes compressor overheat protection. Keep ventilation gap. If problem persists inspect compressor & refrigerant gas.

A: Compressor locked rotor or faulty start capacitor. Humming sound then safety cut‑off. Technician onsite to replace capacitor or compressor accordingly.

A: Original manufacturer out‑of‑warranty repair is expensive. Our technician handles E1/E3/HH/LL error, no cooling, water leak, fan, compressor, sensor faults. On‑site inspection & quotation for Kwun Tong, Kowloon, HK Island, New Territories.