What causes Yaskawa error WLL?

Level sensor malfunction or damage. Wiring fault to the level sensor. Analog input signal outside the 3-21 mA range

How do you fix Yaskawa fault code WLL?

1. Repair or replace the level sensor 2. Check wiring between the level sensor and the drive

WLL

Water Level Loss

Yaskawa · iQpump1000

What does WLL mean?

An analog input programmed for setting 23 'WaterLvl/Suction' has dropped below 3 mA or risen above 21 mA for longer than 1 second. This indicates a problem with the level sensor or its wiring.

Common Causes

Level sensor malfunction or damage
Wiring fault to the level sensor
Analog input signal outside the 3-21 mA range

Repair Steps & Checklist

Click steps to track your progress.

1
Repair or replace the level sensor
2
Check wiring between the level sensor and the drive

Browse all codes in this manual (45)

Verified technical data. Last updated: April 2026

Source: Yaskawa iQpump1000

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Water Level Loss

What does WLL mean?

Water Level Loss

What does WLL mean?

Common Causes

Repair Steps & Checklist

Related Faults