E4-00 — Abnormal suction pressure

• Low refrigerant level
• Restriction in the refrigerant lines
• Faulty suction pressure sensor

Click steps to track your progress.

1. 1

   Ensure the unit's filters are clean.

2. 2

   Check for any signs of refrigerant leaks.

3. 3

   Avoid operating the unit in extreme conditions.

4. 4

   A qualified technician is required to check refrigerant pressures and levels.