Verified shared codeset

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DISPLAY codeset

WWK service and fault-code display

16 documented fault codes, shared only by the compatible models listed here.

In the display order below, the held evidence set runs from Stiebel Eltron WWK222 to Stiebel Eltron WWK302H; its published labels start with 128 and end with E 64. The source and each model-mapping record remain visible on this page.

Compatible models

This result is published only for the models explicitly covered by the source evidence.

Stiebel EltronWWK222
Stiebel EltronWWK222H
Stiebel EltronWWK302
Stiebel EltronWWK302H

Published codes

Fault code

128

Amber — service attention

Amber means the fault needs attention; contact the manufacturer or a licensed technician if it persists.

Documented as no communication between the controller and programming unit.

A licensed technician confirms the actual cause.

View the canonical 128 result

Fault code

16

Amber — service attention

Amber means the fault needs attention; contact the manufacturer or a licensed technician if it persists.

Documented as an impressed-current anode short circuit or faulty protective anode.

A licensed technician confirms the actual cause.

View the canonical 16 result

Fault code

2

Amber — service attention

Amber means the fault needs attention; contact the manufacturer or a licensed technician if it persists.

Documented as a faulty cylinder-top sensor.

A licensed technician confirms the actual cause.

View the canonical 2 result

Fault code

32

Amber — service attention

Amber means the fault needs attention; contact the manufacturer or a licensed technician if it persists.

Documented as operation without a completely filled cylinder.

A licensed technician confirms the actual cause.

View the canonical 32 result

Fault code

4

Amber — service attention

Amber means the fault needs attention; contact the manufacturer or a licensed technician if it persists.

Documented as a faulty integral sensor.

A licensed technician confirms the actual cause.

View the canonical 4 result

Fault code

512

Red — urgent safety concern

Red means the documented fault involves safety-critical, leak, electrical, refrigerant, lockout or overheat language.

Documented as a refrigerant-circuit fault.

A licensed technician confirms the actual cause.

View the canonical 512 result

Fault code

6

Amber — service attention

Amber means the fault needs attention; contact the manufacturer or a licensed technician if it persists.

Documented as faulty cylinder-top and integral sensors.

A licensed technician confirms the actual cause.

View the canonical 6 result

Fault code

64

Amber — service attention

Amber means the fault needs attention; contact the manufacturer or a licensed technician if it persists.

Documented as the defrost temperature not being reached within the maximum defrost time.

A licensed technician confirms the actual cause.

View the canonical 64 result

Fault code

8

Amber — service attention

Amber means the fault needs attention; contact the manufacturer or a licensed technician if it persists.

Documented as the cylinder not heating within the maximum temperature-increase time.

A licensed technician confirms the actual cause.

View the canonical 8 result

Fault code

E 1

Amber — service attention

Amber means the fault needs attention; contact the manufacturer or a licensed technician if it persists.

Documented as a faulty air-inlet temperature sensor.

A licensed technician confirms the actual cause.

View the canonical E 1 result

Fault code

E 128

Amber — service attention

Amber means the fault needs attention; contact the manufacturer or a licensed technician if it persists.

Documented as a permanent pressure-switch fault.

A licensed technician confirms the actual cause.

View the canonical E 128 result

Fault code

E 16

Amber — service attention

Amber means the fault needs attention; contact the manufacturer or a licensed technician if it persists.

Documented as the high-pressure switch responding.

A licensed technician confirms the actual cause.

View the canonical E 16 result

Fault code

E 2

Amber — service attention

Amber means the fault needs attention; contact the manufacturer or a licensed technician if it persists.

Documented as a faulty evaporator temperature sensor.

A licensed technician confirms the actual cause.

View the canonical E 2 result

Fault code

E 32

Red — urgent safety concern

Red means the documented fault involves safety-critical, leak, electrical, refrigerant, lockout or overheat language.

Documented as an electrical fault.

A licensed technician confirms the actual cause.

View the canonical E 32 result

Fault code

E 4

Amber — service attention

Amber means the fault needs attention; contact the manufacturer or a licensed technician if it persists.

Documented as a faulty hot-gas temperature sensor.

A licensed technician confirms the actual cause.

View the canonical E 4 result

Fault code

E 64

Amber — service attention

Amber means the fault needs attention; contact the manufacturer or a licensed technician if it persists.

Documented as evaporator temperature below the minimum.

A licensed technician confirms the actual cause.

View the canonical E 64 result

Official source

Where this result comes from

STIEBEL ELTRON Australia. STIEBEL ELTRON WWK 222/302 Operation and Installation Manual. Retrieved 29 August 2026.

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