1. Dismantle fan coil unit.

2. Dismantle fan coil unit into parts.

3. Cooling coil before chemical servicing.

4. Applying chemical on to the cooling coil.

5. Using chemical to clean all parts (except electrical component).

6. Cooling coil after chemical servicing.

7. Assemble all fan coil unit individual parts.

8. Install back fan coil unit.

9. Check refrigerent pressure.

10. Test run the system.