中文
含义
长虹空调检测到压缩机相电流过流，显示屏显示 E8 错误代码。E8 表示压缩机运行电流超出了系统预设的最大允许值，驱动板或主板检测到过流后立即触发保护，防止压缩机线圈烧毁和驱动电路损坏。此故障多发生在压缩机启动瞬间或高负载运行状态下，空调会自动停机。
常见原因
- 压缩机内部绕组匝间短路或对地绝缘下降，导致运行电流大幅增加。
- 制冷系统堵塞（如毛细管或电子膨胀阀堵死），压缩机负载异常增大导致电流飙升。
- 制冷剂加注过量，系统高压侧压力过高，压缩机运行负载过重。
- 压缩机运转电容（交流机型）击穿或容量异常，导致启动电流和运行电流超限。
- 室外机主板/驱动板上的电流检测电路元件漂移或损坏，误报过流。
- 室外机冷凝器散热严重不良，冷凝压力温度过高迫使压缩机在极端工况下运行。
自助排查
- 立即停止空调运行并断开电源，让系统完全冷却至少 30 分钟。
- 检查室外机周围通风状况——确保进出风口无遮挡，冷凝器翅片无严重积尘堵塞。
- 重新通电开机，将温度设置在 28°C 制冷或 20°C 制热（避免极端设定），观察是否在短时间内仍触发 E8。
- 如果空调是近期加注过制冷剂后出现 E8，可能存在制冷剂过量问题，需由专业人员重新称量充注。
- 压缩机过流保护是严重故障，继续强制运行存在烧毁压缩机和驱动板的风险。请联系长虹空调售后服务中心，由专业技师使用电流钳表测量实际运行电流，使用压力表检测系统高低压，定位是电气故障还是系统故障并处理。
English
Meaning
The Changhong air conditioner has detected compressor phase overcurrent, displaying the E8 error code. E8 indicates the compressor operating current has exceeded the system’s preset maximum allowable value. The driver board or main board triggers protection immediately upon detecting overcurrent to prevent compressor coil burnout and drive circuit damage. This fault typically occurs at compressor startup or under high-load operation — the AC will shut down automatically.
Common Causes
- Inter-turn short circuit or degraded ground insulation within the compressor windings, causing a significant increase in operating current.
- Refrigeration system blockage (e.g., a completely blocked capillary tube or electronic expansion valve), causing abnormally high compressor load and current surge.
- Overcharging of refrigerant, causing excessively high system high-side pressure and overloading the compressor.
- The compressor run capacitor (AC models) has broken down or has abnormal capacitance, causing startup and running currents to exceed limits.
- The current detection circuit components on the outdoor unit main board/driver board have drifted or are damaged, falsely reporting overcurrent.
- Severely poor outdoor condenser heat dissipation, with extremely high condensing pressure and temperature forcing the compressor to operate under extreme conditions.
Self-Check Steps
- Immediately stop the AC and disconnect power. Allow the system to cool down completely for at least 30 minutes.
- Check the ventilation around the outdoor unit — ensure the intake and outlet are unobstructed and the condenser fins are not heavily clogged with dust.
- Reconnect power and start the unit with the temperature set to 28°C for cooling or 20°C for heating (avoiding extreme settings). Observe whether E8 still triggers within a short time.
- If E8 appeared shortly after refrigerant was recently added to the system, there may be an overcharge issue that requires a professional to re-weigh and charge the correct amount.
- Compressor overcurrent protection is a serious fault — continuing forced operation risks burning out the compressor and driver board. Contact Changhong AC after-sales service for a professional technician to measure actual operating current with a clamp meter, check system high/low pressure with gauges, diagnose whether the fault is electrical or system-related, and address it accordingly.