CH04 - Float switch activated or drain pump issue

What does CH04 mean?

This code indicates the float switch in the fan coil unit has risen due to high water level. If the unit lacks a drain pump, it means a jumper plug is missing from the drain terminal.

• High water level in the drain pan
• Missing drain float switch jumper plug

Click steps to track your progress.

1. 1

   Check the drain pan for obstructions or blockages that may cause water to back up.

2. 2

   If the unit has a drain pump, ensure it is functioning correctly.

3. 3

   If the unit does not have a drain pump, verify that the jumper plug is correctly inserted into the CN FLOAT terminal.

4. 4

   Reset the unit's power to clear the fault after the water level has dropped or the jumper is replaced.