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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

All-In-One Select controller display

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

In the display order below, the held evidence set runs from Emerald Energy HPA1-S220 to Emerald Energy HPA1-S320E; its published labels start with E05 and end with E78. 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.

  • Emerald EnergyHPA1-S220
  • Emerald EnergyHPA1-S220E
  • Emerald EnergyHPA1-S270
  • Emerald EnergyHPA1-S270E
  • Emerald EnergyHPA1-S320
  • Emerald EnergyHPA1-S320E

Published codes

Fault code

E05

Amber — service attention

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

Documented as High pressure switch failure.

A licensed technician confirms the actual cause.

View the canonical E05 result

Fault code

E09

Amber — service attention

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

Documented as Communication failure between controller and main board.

A licensed technician confirms the actual cause.

View the canonical E09 result

Fault code

E12

Amber — service attention

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

Documented as Gas exhaust temperature too high.

A licensed technician confirms the actual cause.

View the canonical E12 result

Fault code

E14/E15

Amber — service attention

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

Documented as Heat pump temp sensor failure.

A licensed technician confirms the actual cause.

View the canonical E14/E15 result

Fault code

E16

Amber — service attention

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

Documented as Evaporator coil temperature sensor failure.

A licensed technician confirms the actual cause.

View the canonical E16 result

Fault code

E18

Amber — service attention

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

Documented as Gas exhaust temperature sensor failure.

A licensed technician confirms the actual cause.

View the canonical E18 result

Fault code

E21

Amber — service attention

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

Documented as Ambient temperature sensor failure.

A licensed technician confirms the actual cause.

View the canonical E21 result

Fault code

E27

Amber — service attention

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

Documented as Legionella control temp sensor failure.

A licensed technician confirms the actual cause.

View the canonical E27 result

Fault code

E29

Amber — service attention

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

Documented as Gas suction temperature sensor failure.

A licensed technician confirms the actual cause.

View the canonical E29 result

Fault code

E78

Amber — service attention

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

Documented as Power detection module communication failure.

A licensed technician confirms the actual cause.

View the canonical E78 result

Official source

Where this result comes from

Emerald Energy. Emerald Heat Pump All-In-One Select Troubleshooting. Retrieved .

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