中文
含义
故障码 4 为化霜故障。室外机化霜逻辑或化霜传感器异常。
常见原因
- 化霜传感器损坏
- 四通阀换向故障
- 化霜继电器故障
- 室外环境过低
自助排查
- 检查化霜传感器
- 观察化霜周期
- 联系三菱电机售后
English
Meaning
Code 4: Defrost fault. Outdoor unit defrost logic or sensor anomaly.
Common Causes
- Defrost sensor damaged
- 4-way valve stuck
- Defrost relay fault
- Low outdoor temp
Self-Check Steps
- Check defrost sensor
- Observe defrost cycle
- Contact Mitsubishi service