Carrier Ceiling-Suspended Fan Coil Unit 40QAQ-036

Open the unit and clean fins inside

Remove dust from electrical parts

Check electrical connections are tight

Check that outdoor fan assembly is tight

Turn off power to the system using the remote thermostat mode button until the display shows 'OFF'.

Turn off the outdoor disconnect switch located near the outdoor unit.

If the indoor unit is on a separate switch, ensure this disconnect is turned off as well.

Remove air filters by pulling them straight out.

Inspect filters for any signs of breakdown or tears.

Choose cleaning method for filters

Remove any dirt or obstruction from discharge opening.

Use a garden hose to spray water on the coil.

Describe any visible damage to the coil fins after cleaning.

Is the coil free of debris after cleaning?

Was the cleaning process completed without any injuries?

Place a plastic sheet on the floor to catch any water that may spill from drain pan.

Remove the intake grille and distribution assembly (attached).

Remove the condensate water in the drain pan by letting water drain into a 3-gallon bucket.

Ensure no damage is done to the drain pan during removal.

Remove the 4 screws holding the drain pan.

Carefully hold the drain pan to remove it from the assembly.

Condensate Drainage System Check

Remove grille and frame from the unit

Insert a water bottle into the fan coil unit and fill drain pan

Is water flowing steadily from the drain pan?

If water is not flowing steadily, describe the issue (e.g., pipe slope or restrictions)

Ensure all wiring connections are correct and tight

Check that all barriers, covers, and panels are in place

Ensure filters and return-air grilles are installed and discharge louvers are positioned correctly

Complete the Start-Up Checklist on page CL-1