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Heat Pump Fault Finder AU

Verified codeset result

The manufacturer documentation publishes fault code EE4 for the MK4068 bolt-on heat-pump controller display, mapped to the affected Siddons Solarstream models listed below.

Fault code EE4

Siddons Solarstream MK4068 bolt-on heat-pump controller display: EE4

MK4068 bolt-on heat-pump controller display

SS

Last verified from the captured official source review.

EE4 meaning for this display codeset

This page isolates Siddons Solarstream fault code EE4 for the MK4068 bolt-on heat-pump controller display. It does not combine the Siddons Solarstream EE4 meaning with another controller or codeset.

Before applying the Siddons Solarstream EE4 meaning, confirm the affected model uses the MK4068 bolt-on heat-pump controller display. In that controller namespace, EE4 means documented as power phase-sequence protection.

The Siddons Solarstream Bolt-On Heat Pump Owner Manual MK4068-02B source anchor on page 25 supports this Siddons Solarstream EE4 record for the MK4068 bolt-on heat-pump controller display.

The permanent source key siddons-solarstream-mk4068-display EE4 keeps the siddons-solarstream-mk4068-display EE4 controller/code pairing distinct in publication.

What the documentation says

Documented as power phase-sequence protection.

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

Severity

Red — urgent safety concern

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

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

Prioritise safety before the repair-or-replace decision

A red classification warrants urgent assessment by an appropriately licensed professional. The code alone cannot establish whether a component repair or full system replacement is proportionate.

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.

  • EE1

    Documented as system high-pressure protection.

  • EE2

    Documented as system low-pressure protection.

  • EE8

    Documented as a communication failure.

  • PP1

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

  • PP2

    Documented as a water-outlet temperature-sensor failure.

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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