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Heat Pump Fault Finder AU

Verified shared codeset

Every result below passed dual extraction agreement and source-anchor checks.

DISPLAY codeset

Commercial CHP020 and CHP040 controller display

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

In the display order below, the held evidence set runs from Rinnai CHP020 to Rinnai CHP040; its published labels start with A05 and end with A30. 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.

  • RinnaiCHP020
  • RinnaiCHP040

Published codes

Fault code

A05

Amber — service attention

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

Documented as a tank-water temperature probe failure.

A licensed technician confirms the actual cause.

View the canonical A05 result

Fault code

A06

Amber — service attention

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

Documented as an outlet-water temperature probe failure.

A licensed technician confirms the actual cause.

View the canonical A06 result

Fault code

A16

Amber — service attention

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

Documented as an ambient-temperature probe failure.

A licensed technician confirms the actual cause.

View the canonical A16 result

Fault code

A24

Amber — service attention

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

Documented as a suction-temperature probe failure.

A licensed technician confirms the actual cause.

View the canonical A24 result

Fault code

A25

Amber — service attention

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

Documented as an open high-pressure switch.

A licensed technician confirms the actual cause.

View the canonical A25 result

Fault code

A26

Amber — service attention

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

Documented as a high-pressure transducer threshold exceedance or failure.

A licensed technician confirms the actual cause.

View the canonical A26 result

Fault code

A27

Amber — service attention

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

Documented as a low-pressure transducer failure.

A licensed technician confirms the actual cause.

View the canonical A27 result

Fault code

A29

Amber — service attention

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

Documented as an open low-pressure switch.

A licensed technician confirms the actual cause.

View the canonical A29 result

Fault code

A30

Amber — service attention

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

Documented as reversed supply phase or compressor overload.

A licensed technician confirms the actual cause.

View the canonical A30 result

Official source

Where this result comes from

Rinnai Australia. Rinnai Commercial CHP020 and CHP040 Heat Pump Error Codes. Retrieved .

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