Gree mini split error code H7
Compressor desynchronization (loss of sync).
- TypeProtection
- SystemCompressor / inverter
- Can I fix it?Technician job
What H7 means on a Gree
The inverter lost sync with the compressor motor during running.
On this platform, H7 is a protection: the system stopped or throttled itself to prevent damage; many clear on their own once conditions return to normal.
Common causes
- A failing compressor.
- A failed inverter drive.
- Unstable supply voltage.
- Liquid refrigerant flooding the compressor.
How to fix it yourself
Do the reset and the visual checks, but the underlying repair needs a technician with a meter and the service manual.
- Reset the system: switch the breaker (or the outdoor disconnect) off, wait a full five minutes so the boards fully discharge, then switch it back on and restart from the remote.
- If you own a multimeter and are comfortable using it, measure the supply voltage at the outdoor unit's L1 and L2 terminals with the unit running. A 230 V system should read roughly 208 to 253 VAC.
Switch off power at the breaker before opening either unit. Capacitors in the outdoor unit hold a charge for several minutes after power is cut.
When to call a technician
Technician diagnosis of the drive and compressor.
Which Gree units show H7
This page applies to Gree Livo, Vireo, Sapphire, Crown, Multi21 and Flexx units. Gree's own documentation lists H7 as "Compressor desynchronization (loss of sync)", the same definition used across the Gree platform it is built on. If your unit shows a code with a different shape (for example a four-character code, or a plain number), it is from a different table; use the lookup with your exact code.
Where Gree shows this code
The code shows on the indoor unit's display in place of the temperature. If the display is off, press the Light button on the remote. Some models also count out the code as indicator blinks. E codes are system protections and faults, F codes are mostly sensor faults, H codes are outdoor and compressor protections, U codes are motor and valve faults, and P codes are power-supply faults.
Other Gree codes
Same part of the system as H7:
H7 on other brands
The same characters do not always mean the same thing. Check the brand on your unit.
- Blueridge H7 Compressor desynchronization (loss of sync)
- Daikin H7 Outdoor fan motor signal fault
Questions people ask
Can I reset a Gree H7 code myself?
Yes. Turn the system off at the breaker for five minutes, then restart it. If H7 comes back, the fault is real and needs the checks above.
Is it safe to keep running a Gree showing H7?
Not repeatedly. A protection code means the unit stopped itself to prevent damage, and resetting it over and over can turn a cheap repair into a compressor failure. Reset once, check the basics, and stop if it returns.
What will a technician check for H7?
Technician diagnosis of the drive and compressor. Ask for the measurements, not just a parts quote.
Sources
- Gree residential split service manuals (error code tables)
Updated September 2026. Codes and definitions vary by model year. If your manual disagrees with this page, your manual wins. Send a correction.