In brief
Fault code E6 on Gree All Split ranges means: Fault code E6 indicates that the indoor unit is no longer receiving a response from the outdoor unit. This is a wiring or power supply issue to the outdoor unit, common on Gree splits and air conditioning units. Most common cause: Communication cable (S wire or wire 2) cut or loose, no power supply to the outdoor unit, or faulty PCB. An F-Gas registered engineer first checks the terminal block. First action: Check the voltage between N and the communication wire (DC fluctuation).. Call a registered engineer if the fault returns after basic checks or involves refrigerant work (F-Gas registered engineer required).
Gree E6 indicates a loss of RS485 communication between indoor and outdoor units for more than 60 seconds, as per Gree Technical Training - Communication Errors.
E6 • Gree • All Split ranges
Gree fault code E6: communication — test procedure
Fault code E6 indicates that the indoor unit is no longer receiving a response from the outdoor unit. This is a wiring or power supply issue to the outdoor unit, common on Gree splits and air conditioning units.
Source: Gree Technical Training - Communication Errors
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What does fault code E6 on Gree mean?
Fault code E6 indicates that the indoor unit is no longer receiving a response from the outdoor unit. This is a wiring or power supply issue to the outdoor unit, common on Gree splits and air conditioning units.
Communication cable (S wire or wire 2) cut or loose, no power supply to the outdoor unit, or faulty PCB. An F-Gas registered engineer first checks the terminal block.
Symptômes
- The indoor unit blows air but the outdoor unit does not start
- Flashing fault code E6
Diagnostic
1. Electrical check
- Check the voltage between N and the communication wire (DC fluctuation).
- Verify that the outdoor unit is powered (230V).
How to reset fault code E6 on Gree?
Restore continuity of the communication cable. If the wiring is good, replace the outdoor main PCB.
When should you call an F-Gas engineer?
Appears after a power cut, refrigerant line extension without rewiring communication, or work on the outdoor terminal block. May affect a single indoor unit (partial E6) or all indoor units (global E6).
Affected models
- Flexx Ultra R32
- Multi21 Plus
- High Static Slim Duct
- Universal Floor Ceiling
Field context
Appears after a power cut, refrigerant line extension without rewiring communication, or work on the outdoor terminal block. May affect a single indoor unit (partial E6) or all indoor units (global E6).
Technical source data
Gree E6 indicates a loss of RS485 communication between indoor and outdoor units for more than 60 seconds. Service causes: loose or cut communication wire, incorrect communication address (SA1), communication parameter not set to RS485, or faulty PCB after swapping cable between a working indoor unit and the faulty one.
Sources: flexx-ultra-r32-a-coil-service-manual-a.pdf (p. 12) · multi21-plus-service-manual-30k-36k-42k-c.pdf (p. 30)
Questions fréquentes
What is the difference between partial E6 and global E6 on Gree?
Partial E6: one or a few indoor units no longer communicate — test by swapping the communication cable from a working indoor unit. Global E6: all indoor units — check outdoor power supply and main terminal block.
Is the SA1 dip-switch related to Gree E6?
Yes, the Flexx manual states to check that the first bit of SA1 on the indoor unit is correctly set for RS485 mode.
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