Verified codeset result
The manufacturer documentation publishes fault code A28 for the Enviroflo S 5.0kW remote-controller flashing codes, mapped to the affected Rinnai models listed below.
Fault code A28
Rinnai Enviroflo S 5.0kW remote-controller flashing codes: A28
Enviroflo S 5.0kW remote-controller flashing codes
Last verified from the captured official source review.
A28 meaning for this led_blink codeset
This page isolates Rinnai fault code A28 for the Enviroflo S 5.0kW remote-controller flashing codes. It does not combine the Rinnai A28 meaning with another controller or codeset.
Before applying the Rinnai A28 meaning, confirm the affected model uses the Enviroflo S 5.0kW remote-controller flashing codes. In that controller namespace, A28 means documented as heat pump water outlet sensor fault.
The Rinnai Enviroflo S 5.0kW Operation and Installation Manual source anchor on page 30 supports this Rinnai A28 record for the Enviroflo S 5.0kW remote-controller flashing codes.
The permanent source key rinnai-enviroflo-s5-led A28 keeps the rinnai-enviroflo-s5-led A28 controller/code pairing distinct in publication.
What the documentation says
Documented as heat pump water outlet sensor fault.
This is a paraphrase of the manufacturer’s documentation. A licensed technician confirms the actual cause.
Severity
Amber means the fault needs attention; contact the manufacturer or a licensed technician if it persists.
Owner outcomes
What owners reported next
This aggregate appears after at least three structured reports for this exact codeset and code. Counts come from fixed choices only. Private notes are never shown here.
- Fixed
- Unit replaced
- Still unresolved
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.
- RinnaiKSHP250M24R50Exact manual match
- RinnaiKSHP250M24R50HExact manual match
- RinnaiKSHP315M24R50Exact manual match
- RinnaiKSHP315M24R50HExact manual match
Related codes from this codeset
These codes appear in the same documented controller or display codeset.
Choose the right next step
Warranty or local repair?
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Choose both answers to see the recommended route.
Start with the manufacturer
The unit is under warranty or its coverage is uncertain, so no local repair lead form is shown. Ask the manufacturer about warranty support and keep proof of purchase.
Manufacturer route
Official support
Active support recorded
This brand is recorded as active in the Australian market.
Rinnai Australia's current support library provides heat-pump error-code and service routes.
Status checked · Research source
Warranty varies by Enviroflo line: S 5.0kW split has 10 years cylinder parts and 5 years compressor parts; current A and AR/GR lines publish 7 years cylinder and 5 years refrigeration components, with 1 year other components.
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Official source
Where this result comes from
Rinnai Australia. Rinnai Enviroflo S 5.0kW Operation and Installation Manual, PDF page 30. Retrieved .