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Heat Pump Fault Finder AU

Verified codeset result

The manufacturer documentation publishes fault code A26 for the Commercial CHP020 and CHP040 controller display, mapped to the affected Rinnai models listed below.

Fault code A26

Rinnai Commercial CHP020 and CHP040 controller display: A26

Commercial CHP020 and CHP040 controller display

Rinnai logo (for identification)

Last verified from the captured official source review.

A26 meaning for this display codeset

This page isolates Rinnai fault code A26 for the Commercial CHP020 and CHP040 controller display. It does not combine the Rinnai A26 meaning with another controller or codeset.

Before applying the Rinnai A26 meaning, confirm the affected model uses the Commercial CHP020 and CHP040 controller display. In that controller namespace, A26 means documented as a high-pressure transducer threshold exceedance or failure.

The Rinnai Commercial CHP020 and CHP040 Heat Pump Error Codes source anchor on page 2 supports this Rinnai A26 record for the Commercial CHP020 and CHP040 controller display.

The permanent source key rinnai-commercial-chp020-chp040-display A26 keeps the rinnai-commercial-chp020-chp040-display A26 controller/code pairing distinct in publication.

What the documentation says

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

This is a paraphrase of the manufacturer’s documentation. A licensed technician confirms the actual cause.

Severity

Amber — service attention

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

Qualified service work

What a technician will check

These are paraphrased technician-facing checks from the manual, not homeowner instructions.

Repair, replacement and warranty context

Start with diagnosis, then compare repair and replacement

An amber classification usually calls for a diagnosis and repair quote, not automatic replacement. Compare parts availability, repair cost and system age only after the fault has been confirmed by an appropriately licensed professional.

This brand has a verified current Australian support route, so check warranty coverage with the manufacturer before authorising paid repair or replacement work.

Affected models

Every model mapped to this codeset is listed with the evidence match state used by this site.

  • RinnaiCHP020
    Exact manual match
  • RinnaiCHP040
    Exact manual match

Related codes from this codeset

These codes appear in the same documented controller or display codeset.

  • A16

    Documented as an ambient-temperature probe failure.

  • A24

    Documented as a suction-temperature probe failure.

  • A25

    Documented as an open high-pressure switch.

  • A27

    Documented as a low-pressure transducer failure.

  • A29

    Documented as an open low-pressure switch.

  • A30

    Documented as reversed supply phase or compressor overload.

Choose the right next step

Warranty or local repair?

Answer both questions. If the unit may be covered, we will direct you to the manufacturer first. Your answers stay in this page unless you submit a repair request.

Choose both answers to see the recommended route.

Official source

Where this result comes from

Rinnai Australia. Rinnai Commercial CHP020 and CHP040 Heat Pump Error Codes, PDF page 2. Retrieved .

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