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Heat Pump Fault Finder AU

Verified codeset result

The manufacturer documentation publishes fault code PP4 for the MK4068 bolt-on heat-pump controller display, mapped to the affected Siddons Solarstream models listed below.

Fault code PP4

Siddons Solarstream MK4068 bolt-on heat-pump controller display: PP4

MK4068 bolt-on heat-pump controller display

SS

Last verified from the captured official source review.

PP4 meaning for this display codeset

This page isolates Siddons Solarstream fault code PP4 for the MK4068 bolt-on heat-pump controller display. It does not combine the Siddons Solarstream PP4 meaning with another controller or codeset.

Before applying the Siddons Solarstream PP4 meaning, confirm the affected model uses the MK4068 bolt-on heat-pump controller display. In that controller namespace, PP4 means documented as a system suction temperature-sensor failure.

The Siddons Solarstream Bolt-On Heat Pump Owner Manual MK4068-02B source anchor on page 25 supports this Siddons Solarstream PP4 record for the MK4068 bolt-on heat-pump controller display.

The permanent source key siddons-solarstream-mk4068-display PP4 keeps the siddons-solarstream-mk4068-display PP4 controller/code pairing distinct in publication.

What the documentation says

Documented as a system suction temperature-sensor 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.

Source-grounded diagnosis context

Documented causes

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.

A current Australian support status has not been verified for this brand. Retain purchase and warranty records, and confirm the available support route 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.

Related codes from this codeset

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

  • PP1

    Documented as a hot-water tank temperature-sensor failure.

  • PP2

    Documented as a water-outlet temperature-sensor failure.

  • PP3

    Documented as a system coil temperature-sensor failure.

  • PP5

    Documented as a solar-collector temperature-sensor failure.

  • PP6

    Documented as an ambient temperature-sensor failure.

  • PP7

    Documented as water-flow protection.

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

Siddons Solarstream. Siddons Solarstream Bolt-On Heat Pump Owner Manual MK4068-02B, PDF page 25. Retrieved .

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