Samsung DVM S VRF Aircon E428 Error Code
Confirm the listed meaning of Samsung DVM S VRF E428, note the unit that shows the code and its model, and match the service manual before diagnosis. Match the model first; same-looking codes can point to different rows.
What does Samsung E428 mean?
Samsung DVM S VRF E428 is listed as compressor operation stop due to abnormal compression ratio and outdoor-unit compression-ratio error in the DVM S ODU service manual (2018), DVM S2 service manual (2024), and Samsung AJ***TN1DKH WindFree 1-way cassette fault lists. This meaning comes from the manufacturer's own diagnostic material. Do not collapse this code across model families; use the model, series, or system type to choose the right row. Confirm the exact model, series, or signal row before accepting a parts quote.
What to do now
Use these steps to record evidence and match the installed model to its service manual before diagnosis or a repair quote.
Record E428 and match the service manual
Record E428 and stop there; the manufacturer gives no customer reset procedure. Arrange diagnosis with the matching service manual.
No manufacturer reset steps listed for E428
Capture the complete E428 error code and model stickers first. The manufacturer lists the meaning but no customer reset procedure; do not treat a generic power-cycle as manufacturer guidance.
Send these to us
E428 error code, a clear display photo, Samsung DVM S VRF indoor and outdoor model stickers, the controller, gateway, or unit that reported the code, operating mode and affected area, and any power or setting changes made after the code appeared
Choose the listing that matches your unit
The same code has more than one listed meaning. Match the model family, the system type and the unit that shows the code before approving parts.
| Code | What it means | What to check first |
|---|---|---|
| DVM S ODU service manual (2018) / DVM S2 service manual (2024) | Compressor operation stop due to abnormal compression ratio | Match this meaning to your installed model and the unit that shows the code, then use the checks below. |
| Samsung AJ***TN1DKH WindFree 1-way cassette | Outdoor-unit compression-ratio error | Match this meaning to your installed model and the unit that shows the code, then use the checks below. |
- Code
- DVM S ODU service manual (2018) / DVM S2 service manual (2024)
- What it means
- Compressor operation stop due to abnormal compression ratio
- What to check first
- Match this meaning to your installed model and the unit that shows the code, then use the checks below.
- Code
- Samsung AJ***TN1DKH WindFree 1-way cassette
- What it means
- Outdoor-unit compression-ratio error
- What to check first
- Match this meaning to your installed model and the unit that shows the code, then use the checks below.
Guidance for your model
Notes that match the code to your exact model. Electrical, refrigerant, wiring, resistance and component checks are for a technician.
| Detail | What it says |
|---|---|
| Singapore / model note | Official Samsung DVM S outdoor-unit service-manual row from AC-00076E (2018). It is not claimed as a DVM S2 or every-model Samsung VRF code. Confirm the installed model, reporting address, and matching manual before diagnosis or parts replacement. |
| Singapore / model note | Samsung-authored DVM S2 service-manual row from AC-00294E_2 (June 2024), retrieved from a public document mirror. Confirm the installed outdoor model, connected indoor family, regional suffix, and matching locally supplied manual before diagnosis or parts replacement. |
| Singapore / model note | Official Samsung regional AJ***TN1DKH WindFree 1-way cassette installation-manual row. Confirm the exact indoor and outdoor family before using this interpretation; the Malaysia support source does not establish exact Singapore supply. |
- Detail
- Singapore / model note
- What it says
- Official Samsung DVM S outdoor-unit service-manual row from AC-00076E (2018). It is not claimed as a DVM S2 or every-model Samsung VRF code. Confirm the installed model, reporting address, and matching manual before diagnosis or parts replacement.
- Detail
- Singapore / model note
- What it says
- Samsung-authored DVM S2 service-manual row from AC-00294E_2 (June 2024), retrieved from a public document mirror. Confirm the installed outdoor model, connected indoor family, regional suffix, and matching locally supplied manual before diagnosis or parts replacement.
- Detail
- Singapore / model note
- What it says
- Official Samsung regional AJ***TN1DKH WindFree 1-way cassette installation-manual row. Confirm the exact indoor and outdoor family before using this interpretation; the Malaysia support source does not establish exact Singapore supply.
What to check before repair
The manufacturer's fault table gives the code's meaning, not a repair procedure. Capture evidence first; model-specific tests belong to the matching service manual.
| You can check | Technician should confirm |
|---|---|
| Photograph the complete E428 error code before taking any action. | Confirm E428 exactly and record which controller, gateway, or unit reported it. |
| Capture the Samsung DVM S VRF indoor and outdoor model stickers and identify which controller or unit reported it. | Match the indoor and outdoor model stickers, installed family, and reporting equipment to the source scope. |
| The manufacturer provides no customer reset procedure. Preserve the evidence and use the matching service manual for any system action. | Follow the matching service-manual procedure and keep measured test evidence before naming a failed part. |
- You can check
- Photograph the complete E428 error code before taking any action.
- Technician should confirm
- Confirm E428 exactly and record which controller, gateway, or unit reported it.
- You can check
- Capture the Samsung DVM S VRF indoor and outdoor model stickers and identify which controller or unit reported it.
- Technician should confirm
- Match the indoor and outdoor model stickers, installed family, and reporting equipment to the source scope.
- You can check
- The manufacturer provides no customer reset procedure. Preserve the evidence and use the matching service manual for any system action.
- Technician should confirm
- Follow the matching service-manual procedure and keep measured test evidence before naming a failed part.
Source-bounded repair decision
Samsung DVM S VRF E428 confirms the fault label the manufacturer lists, not a failed part or repair procedure. Match the installed model to its service manual and require measured diagnostic evidence before approving parts, settings, or refrigerant work.
Whether the reporting controller or unit and exact installed model are confirmed.
What the matching service-manual procedure and measured tests show.
Whether the proposed repair names the evidence for the failed part or condition.
Samsung E428 questions
What does the Samsung E428 error mean?
Can I fix a Samsung E428 error myself?
Is it safe to keep running the aircon with an E428 error?
What causes a Samsung E428 error?
Will a Samsung E428 error need a repair or a full replacement?
What should I send a technician about a Samsung E428 error?
Where to go next
Confirm the fault
Share the error code, model number and symptoms so we can assess the likely cause.
Not the right code?
Browse the full Samsung list or check a few codes in the same fault category.
Read next
Use this quote-check guide only after the matching service manual identifies the diagnostic path.