Have you noticed water dripping from the ceiling directly below a Fan Coil Unit (FCU)? This problem is common in office buildings, hotels, hospitals, and industrial facilities.
During normal cooling operation, an FCU produces condensate water. This water should collect in the drain pan and flow through the condensate drain pipe. If the drainage system or pipe insulation is not functioning properly, water may leak into the ceiling area.
Here are four common causes you should check.
1. Clogged Condensate Drain Line
Dust, sludge, algae, and other debris can accumulate inside the drain pan or condensate drain pipe. This restricts water flow and may cause the drain pan to overflow.
Solution:
- Clean the drain pan.
- Flush the condensate drain pipe.
- Check that water flows freely to the drainage outlet.
2. Improper Condensate Drain Pipe Slope
A drain pipe installed with insufficient slope, bends, or low points can cause water to accumulate instead of flowing out properly.
Solution: Inspect the pipe installation and ensure the slope follows the system design and manufacturer’s recommendations.
3. Damaged Chilled Water Pipe Insulation
Damaged, incomplete, or poorly sealed insulation can expose cold pipe surfaces to warm, humid air. This causes condensation to form on the outside of the pipe, resulting in water dripping onto the ceiling.
Solution: Inspect insulation along the entire chilled water pipe, especially around joints, valves, fittings, and connections. Replace damaged insulation and ensure the vapor barrier is properly sealed.
4. Cracked or Improperly Installed Drain Pan
A cracked, corroded, or incorrectly positioned drain pan may allow condensate water to escape before reaching the drainage pipe.
Solution: Inspect the drain pan for physical damage, check the FCU installation position, and verify all drain connections. Repair or replace damaged components when necessary.
FCU Water Leakage Inspection Checklist
Before replacing any components, check the following:
- Drain pan condition and cleanliness.
- Condensate drain pipe blockage.
- Drain pipe slope and connections.
- Chilled water pipe insulation condition.
- Valve and fitting connections.
- Drain pump and float switch operation, if installed.
Important: Not all water dripping from a ceiling is caused by condensation. Check for possible chilled water pipe leaks or leaking valve connections as well.
Prevent FCU Water Leakage with Regular Maintenance
Unresolved FCU water leakage can damage ceiling panels, disrupt building operations, and increase facility maintenance costs.
Air Hira Indonesia provides professional HVAC maintenance and service solutions, including:
- FCU inspection and maintenance.
- AHU service and maintenance.
- Chiller inspection and servicing.
- Cooling system troubleshooting.
- Industrial HVAC maintenance.
Need assistance with your FCU or HVAC system?
Contact Air Hira Indonesia:
Website: https://www.airhira.com
WhatsApp: 08977600997
Email: marketing.airhira@gmail.com
Air Hira Indonesia — Your Partner In Industrial Machinery.