4 - mitsubishi Air Conditioner

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

1. 化霜传感器损坏
2. 四通阀换向故障
3. 化霜继电器故障
4. 室外环境过低

自助排查

1. 检查化霜传感器
2. 观察化霜周期
3. 联系三菱电机售后

English

Meaning

Code 4: Defrost fault. Outdoor unit defrost logic or sensor anomaly.

Common Causes

1. Defrost sensor damaged
2. 4-way valve stuck
3. Defrost relay fault
4. Low outdoor temp

Self-Check Steps

1. Check defrost sensor
2. Observe defrost cycle
3. Contact Mitsubishi service