- HVAC
- Air conditioner
E6
Gree E6 on an air conditioner: indoor and outdoor communication fault
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
Medium
Quick answer
On Gree split units, E6 is a communication fault between the indoor and outdoor units: in cooling the compressor stops and in heating the whole unit. Gree says it may clear after a restart; if not, call a professional.
Safety first
Stop and check this first
- Gree asks you not to repair or modify the unit yourself. If the power cord overheats, there is abnormal noise, the breaker trips often, there is a burning smell or the indoor unit leaks, switch off, disconnect the power and call the dealer or a qualified professional.
Safe checks you can perform
- Code on the indoor unit display
- One restart and recent work
- Connections, matching and boards
Leave these tasks to a qualified professional
- Do not attempt this professional task: Check wiring and matching before the boards
- Do not attempt this professional task: Test in cooling and heating
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Check wiring and matching before the boards
What they doThe technician follows Gree's chart for E6: connection between units, box wiring, board matching and communication cable.
They must show youthe terminals checked and each board's reference.
In writingwhich part was replaced, its model and why.
Test in cooling and heating
What they doAfter the repair the technician checks the compressor starts in cooling and the unit runs in heating without E6.
They must show youthe unit running in both modes.
In writingdate and result of the test.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Code on the indoor unit display
- Who:
- you.
- How:
- look at the indoor unit display: Gree shows the code on the temperature indicator, which blinks when there is an abnormality.
- Result that matters:
- that the code is E6.
- If it is E6:
- it is communication between units; carry on with this page.
- If it is another code:
- this page does not apply; look up that code.
- Evidence to keep:
- a photo of the display with the code, date and time.
Evidence: Gree Sapphire installation, service and troubleshooting manual, SAP18HP230V1AH/AO and SAP24HP230V1AH/AO · Gree mini split air conditioner installation and owner's manual, Vireo Plus Ultra
One restart and recent work
- Who:
- you.
- How:
- switch the unit off and on once, as Gree allows for E6. Think back to any recent installation, move or repair.
- Result that matters:
- whether E6 clears and whether there was recent work.
- If it clears:
- note the date; if it returns, report those dates.
- If it returns or there was recent work:
- call a professional and tell them what was done and when.
- Evidence to keep:
- the date of the last installation or repair and of each E6.
Evidence: Gree Sapphire installation, service and troubleshooting manual, SAP18HP230V1AH/AO and SAP24HP230V1AH/AO · Gree mini split air conditioner installation and owner's manual, Vireo Plus Ultra
Connections, matching and boards
- Who:
- an air conditioning technician.
- How:
- with the power isolated, checks the connection line between units and the electric box wiring against the diagram, checks that the boards match and checks the communication cable.
- Result that matters:
- at which point in Gree's chart the fault is fixed.
- If a connection or the cable fails:
- it is fixed without replacing boards.
- If everything is fine:
- Gree says to replace the indoor board and, if it persists, the outdoor board.
- Evidence to keep:
- a job sheet with what was checked and photos of the connection terminals.
The line between units and the electric box carry mains voltage: technician only.
Evidence: Gree Sapphire installation, service and troubleshooting manual, SAP18HP230V1AH/AO and SAP24HP230V1AH/AO
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- HVAC
- Brand
- Gree
- Product type
- Air conditioner
Known code variants
- AEG E6
- AEG E641
- AEG hob E6
- aire acondicionado Daikin E6
- climatisation Daikin E6
- climatizzatore Daikin E6
- code erreur E6 Daikin
- codice E6 Daikin
- código E6 Daikin
- Daikin AC E6
- Daikin E6
- Daikin error E6
- Daikin Fehler E6
- Daikin Fehlercode E6
- E06
- E 6
- E641
- Electrolux hob error message E6 E641
- error E6 Daikin
- error E6 lavavajillas Smeg
- error E6 secadora Haier
- errore E6 Daikin
- Gree E6
- Haier dryer E6
- Haier dryer filters clogged E6
- Haier HD90-A636 E6
- Haier heat pump dryer E6
- Haier secadora E6
- Haier tumble dryer error E6
- Klimaanlage Daikin E6
- lavavajillas Smeg no desagua E6
- mensaje de error E6 E641 encimera Electrolux
- Mitsubishi E6
- Mr. Slim E6
- panne E6 Daikin
- Philips AMF870 E6
- Philips AMF872 E6
- Philips purifier fan heater E6 overheating
- PKA E6
- placa vitrocerámica AEG E6
- purificador ventilador calefactor Philips E6 sobrecalentamiento
- secadora bomba de calor Haier E6
- secadora Haier filtros obstruidos E6
- Smeg dishwasher E6
- Smeg dishwasher error E6
- Smeg dishwasher not draining E6
- Smeg lavavajillas E6
- Smeg LVFABCR3 E6
What it means
Gree considers there is a communication fault when the unit does not receive correct signals for 3 minutes in a row, and then stops the system. In cooling the compressor stops while the indoor fan keeps running; in heating the complete unit stops. Gree's chart checks the connection line between units and the wiring in the electric box, that the boards match, the communication cable and, last, the indoor and outdoor boards. The code does not say which has failed.
Warnings and stop conditions
- Highsource verified
Gree asks you not to repair or modify the unit yourself. If the power cord overheats, there is abnormal noise, the breaker trips often, there is a burning smell or the indoor unit leaks, switch off, disconnect the power and call the dealer or a qualified professional.
Evidence: Gree mini split air conditioner installation and owner's manual, Vireo Plus Ultra
Symptoms and causes
Probable causes · in order
- Connection line or electric box wiringPossible
The first point in Gree's chart. It is suspected above all after an installation or recent work on the unit.
Evidence: Gree Sapphire installation, service and troubleshooting manual, SAP18HP230V1AH/AO and SAP24HP230V1AH/AO
- Boards that do not matchPossible
Gree checks that the main board matches the display board and the indoor board matches the outdoor one. It happens after replacing a board with one that does not match.
Evidence: Gree Sapphire installation, service and troubleshooting manual, SAP18HP230V1AH/AO and SAP24HP230V1AH/AO
- Damaged communication cable or faulty boardsPossible
If connections and matching are fine, Gree replaces the damaged cable and, if it persists, the indoor board and then the outdoor board.
Evidence: Gree Sapphire installation, service and troubleshooting manual, SAP18HP230V1AH/AO and SAP24HP230V1AH/AO
Virtual technician
Does E6 still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Gree Comfort · 2022 · manual
- 2
Gree mini split air conditioner installation and owner's manual, Vireo Plus Ultra
Gree Comfort · 2019 · manual
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