Gree · Heat pump

HU Fan drive AC input voltage fault

High severity Gree GMV6 Mini VRF

What the control is telling you

Outdoor fan drive fault: fan drive ac input voltage fault.

Applies to: Gree GMV6 Ultra Heat Mini VRF 36-60k (GMV-V..WL/C-T(U))

Likely causes

Fan motor or wiring problem
Supply voltage problem
Fan drive / main board fault

Test and repair steps

Warning: Turn off power and wait for the board to discharge before testing.
Check the outdoor fan turns freely and its plug is tight.
Measure the fan motor windings equal resistance and no short to ground (fan motor check in the service manual).
Check 208/230 VAC supply.
Replace the fan motor if it fails the test; otherwise replace the fan drive / outdoor main board.

Models that show this code

3 models in Gree GMV6 Mini VRF

GMV-V36WL/C-T(U)GMV-V48WL/C-T(U)GMV-V60WL/C-T(U)

Other codes on the same units

HF Fan drive charging circuit fault
HH Fan drive DC bus voltage too high
HJ Inverter fan failed to start
HL Fan drive DC bus voltage too low
HP Inverter fan AC current protection
JA Abnormal pressure protection
JL High pressure too low
LA Group control: indoor series mismatch

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Source: Gree GMV6 Ultra Heat Mini VRF 36-60k (GMV-V36-48-60WL-C-T(U)) service.pdf - section Chapter 3 Faults, 4.1 Error Indication. Summarized in our own words; check the original manual for your model.

Homeowner looking at this code? See what it means for you and when to call a technician.

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.