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Heat Pump Fault Finder AU

Verified codeset result

The manufacturer documentation publishes fault code E4 for the HP300S2-F7 controller display, mapped to the affected Haier models listed below.

Fault code E4

Haier HP300S2-F7 controller display: E4

HP300S2-F7 controller display

Haier logo (for identification)

Last verified from the captured official source review.

E4 meaning for this display codeset

This page isolates Haier fault code E4 for the HP300S2-F7 controller display. It does not combine the Haier E4 meaning with another controller or codeset.

Before applying the Haier E4 meaning, confirm the affected model uses the HP300S2-F7 controller display. In that controller namespace, E4 means documented as fault of the ambient temperature sensor.

The Haier HP300S2-F7 Heat Pump Water Heater Operation and Installation Manual source anchor on page 38 supports this Haier E4 record for the HP300S2-F7 controller display.

The permanent source key haier-hp300s2-f7-display E4 keeps the haier-hp300s2-f7-display E4 controller/code pairing distinct in publication.

What the documentation says

Documented as Fault of the ambient temperature sensor.

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

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.

Related codes from this codeset

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

  • E1

    Documented as Electricity leakage alarming.

  • E2

    Documented as Over temperature alarming.

  • E3

    Documented as Fault of the inner temperature sensor.

  • E5

    Documented as Fault of the evaporation temperature sensor.

  • E6

    Documented as Fault of the air exhaust temperature sensor.

  • E7

    Documented as Communication of main control panel and display panel is abnormal.

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

Haier. Haier HP300S2-F7 Heat Pump Water Heater Operation and Installation Manual, PDF page 38. Retrieved .

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