Krupps AL-05

What does Krupps AL-05 mean?

AL-05 on a Krupps dishwasher is a drain timeout: at the end of the total drain cycle the tank pressure switch did not open.

Symptoms

• ALARM light flashing on the control panel
• 'AL' on the left digit LEDs with the code on the right
• Water remaining in the tank after the drain cycle
• Tank not emptying / drains slowly
• Cycle start button red (alarm state)

Common causes

• Overflow still inserted (preventing drain)
• Drain pipe bent, choked or clogged
• Filter clogged (technician check)
• Drain pump plugs damaged (technician check)
• Drain pump damaged (technician check)
• Circuit board RL1 relay damaged (technician check)

Diagnostic steps

1. 01

   Remove the overflow

   User check: make sure the overflow has been removed so the tank can drain.

2. 02

   Check the drain pipe

   User check: inspect the drain pipe for bends, chokes or clogs and clear any obstruction.

3. 03

   Technician: check filter and drain pump

   Technician checks: filter clogged, drain pipe clogged, drain pump plugs damaged, drain pump damaged.

4. 04

   Technician: check the RL1 relay

   Technician check: inspect the circuit board RL1 relay for damage, which can prevent the drain pump from running.

When to call a professional

First confirm the overflow is removed and the drain pipe is clear and not kinked — these are the operator checks. If the tank still will not empty, the manual moves to technician checks: a clogged filter, a damaged drain pump or its plugs, and the RL1 relay on the circuit board. Diagnosing or replacing the drain pump and board relay is technician work, so call qualified service.