Midea Heat pump fault J3E

What it means

Fan module bus voltage too low error.

Likely causes

1. Damage to cables
2. Excessive number of connections
3. Terminals not made to original specification
4. Damage to seals
5. Incorrect fitting of glands

Where to start

1. Inspect casing for alteration affecting protection level
2. Check seals or sealing materials have not degraded and still prevent ingress of flammable atmospheres
3. Check cabling for wear, corrosion, excessive pressure, vibration, sharp edges or adverse environmental effects, including ageing and vibration from compressors or fans