Gree · Heat pump

JL High pressure too low

High severity Gree GMV6 Mini VRF

What the control is telling you

Head pressure stays too low, usually from a large refrigerant loss or a bad high-pressure sensor.

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

Likely causes

Severe undercharge
High pressure sensor fault

Test and repair steps

Leak-check and weigh in the charge.
Check the high-pressure sensor against the voltage chart.

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

HJ Inverter fan failed to start
HL Fan drive DC bus voltage too low
HP Inverter fan AC current protection
HU Fan drive AC input voltage fault
JA Abnormal pressure protection
LA Group control: indoor series mismatch
LJ Indoor function DIP setting wrong
LU PG fan motor zero-crossing fault

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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.