Drain Pump Error

What it means

This code appears on Fujitsu General split and ducted units on the wired remote or indoor display; older models show it as a number of indicator lamp blinks instead of a number. It means the float switch in the drain pan detected a high water level because the drain pump did not remove condensate as it should; this applies to units with a drain pump, such as ducted and cassette types. The unit stops cooling to prevent water overflowing onto the ceiling or furniture. The same number can mean something different on other brands.

Models covered: Fujitsu General (Fujitsu, O General) split and ducted units that show a two-digit error code on the wired remote or indoor display; older models show errors as lamp blink counts instead.

Related codes: 513242

Symptoms4

• Cooling stops and the code shows on the remote.
• Water leaking or damp patches on the ceiling or around the unit.
• The pump runs constantly or cannot be heard at all.
• A damp or musty smell near the indoor unit.

Possible causes5

• A drain line or pan clogged with dirt and algae.
• Wrong fall or a kink in the drain pipe after the pump.
• A failed drain pump.
• A stuck or failed float switch.
• A loose pump or float connector, or a fault in their board circuit.

How to diagnose5

1. Switch off at the breaker and put a bowl or cloth under the unit if it is leaking.
2. Check the drain outlet outside the building: does water come out when the unit runs?
3. The technician opens the service panel and checks the water level in the pan and the condition of the pump and float.
4. The technician tests the pump by pouring water into the pan as described in the service manual.
5. If the pump and float are fine, the technician checks the wiring and connectors on the board.

How to fix5

1. Clean the drain line and pan and remove algae.
2. Correct the drain pipe fall or remove the kink.
3. Clean the float switch or replace it if stuck.
4. Replace the drain pump if it has failed.
5. Repair wiring or the board if needed, then run the unit, confirm water drains and the code does not return.

Repair cost

In Saudi riyals; the highlighted part is the expected range for this fault.

The cost is low when cleaning the drain line fixes it, moderate for a new pump, and higher if the board must be replaced.

Prices are rough estimates including the part and the technician’s fee, and vary with brand, model and part source.
Prices last updated: September 2026

Frequently asked questions