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Gree Error Codes & Diagnostic Codes

Updated · by Aurora Star Tech Inc.

Gree error codes and diagnostic codes: look up a code to see what it means, the likely causes and the steps to fix it.

Gree error codes by equipment type

Gree Heat Pump error codes

CodeMeaning
A0Waiting for commissioning (status)
AbEmergency stop
AURemote emergency stop
b1Outdoor ambient sensor open or shorted (15K)
b2Defrost (coil) sensor open or shorted (20K)
b4Sub-cooler liquid outlet sensor open or shorted (20K)
b5Liquid line (valve) temperature sensor open or shorted
b6Accumulator inlet sensor open or shorted (20K)
b7Gas line (valve) temperature sensor open or shorted
bdSub-cooler gas inlet sensor open or shorted (20K)
bHSystem clock abnormal
bJHigh and low pressure sensors swapped
C0Communication fault IDU/ODU/wired controller
C1Main board to DC-DC controller communication fault
C2Main board to compressor drive communication fault
C3Main board to fan drive communication fault
C4Missing indoor units
C5Jumper (capacity) cap missing or bad
CHIndoor capacity too high
CLIndoor capacity too low
CPMore than one master wired controller
d1Indoor main board fault
d3Indoor return air sensor open or shorted (15K)
d4Indoor coil inlet pipe sensor open or shorted (20K)
d5Indoor coil middle pipe sensor open or shorted (20K)
d6Indoor coil outlet pipe sensor open or shorted (20K)
d9Indoor jumper cap fault
dCIndoor capacity DIP setting wrong
ddWiring/EEV check running (status)
dHWired controller board fault
dLIndoor discharge air sensor open or shorted (15K)
dnWrong interconnect wiring or EEV fault
E0Outdoor unit fault (shown with another code)
E1High pressure protection
E2Indoor coil freeze protection (status)
E3Low pressure protection
E4Compressor discharge temperature too high
E5Overcurrent protection (whole unit)
E6Indoor/outdoor communication fault
E7Mode conflict between indoor units (status)
E8High temperature / overload protection
E9Cold air prevention (status)
EdDrive IPM low temperature protection
EEEEPROM / memory chip fault
EUCompressor slowed - module running hot
F0Low refrigerant / refrigerant blocked protection
F1Indoor room air sensor open or shorted
F2Indoor coil sensor open or shorted
F3Outdoor ambient sensor open or shorted
F4Outdoor coil (condenser middle) sensor open or shorted
F5Compressor discharge sensor open or shorted
F6Compressor slowed - overload
F8Compressor slowed - high current
F9Compressor slowed - high discharge temperature
FHCompressor slowed - indoor coil anti-freeze
FoRefrigerant recovery (pump-down) mode
FPOutdoor DC fan motor fault
H0Compressor slowed - high indoor coil temp in heating
H1Defrost or oil return (status)
H3Compressor overload protection
H4System abnormal (overload)
H5IPM (inverter module) protection
H6Indoor fan motor not running / no feedback
H7Compressor lost synchronism
H8Fan drive module overheated
H9Inverter fan lost synchronism
HAFan drive memory chip fault
HCPFC protection
HEInverter fan phase loss
HFFan drive charging circuit fault
HHFan drive DC bus voltage too high
HJInverter fan failed to start
HLFan drive DC bus voltage too low
HPInverter fan AC current protection
HUFan drive AC input voltage fault
J1Compressor overcurrent
J74-way valve gas mixing
J8High pressure ratio protection
J9Low pressure ratio protection
JAAbnormal pressure protection
JFWiFi module fault
JLHigh pressure too low
L0Indoor unit fault
L1Indoor fan protection
L3Outdoor DC fan motor fault
L4Wired controller power fault
L5Indoor freeze protection
L6Mode conflict (24 V adapter systems)
L7No master indoor unit
L8Indoor power insufficient
L9Power protection
LAGroup control: indoor series mismatch
LbGroup control: units from different systems
LCCompressor failed to start
LdCompressor phase loss
LJIndoor function DIP setting wrong
LPIndoor and outdoor units do not match
LUPG fan motor zero-crossing fault
oEUndefined outdoor unit error
P4Compressor drive PFC protection
P5Compressor phase overcurrent
P6Compressor drive IPM protection
P7Inverter module temperature sensor fault
P8Inverter module overheated
P9Inverter compressor lost synchronism
PACompressor drive memory chip fault
PCCompressor drive current sensing fault
PEInverter compressor phase loss
PFCompressor drive charging circuit fault
PHDC bus voltage too high
PJInverter compressor failed to start
PLDC bus voltage too low
PPInverter compressor AC current protection
PUDC bus capacitor charging fault
U0Compressor preheat not finished
U1Compressor phase current sensing fault
U2Outdoor capacity code / jumper wrong
U3DC bus voltage drop
U4Refrigerant shortage at startup
U5Whole-unit current sensing fault
U6Service valves not opened
U7Reversing (4-way) valve fault
U8Indoor zero-crossing signal fault
U9Outdoor zero-crossing fault
UERefrigerant charging invalid

Find codes by Gree model

Gree Vireo GEN3

3VIR09HP115V1A3VIR09HP230V1A3VIR12HP115V1A3VIR12HP230V1A3VIR18HP230V1A3VIR24HP230V1A

Gree Livo GEN4

4LIV30HP230V1AH4LIV36HP230V1AH

Gree GMV6 Mini VRF

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

Gree Multi21+

MULTI18HP230V1COMULTI24HP230V1CO

Gree Sapphire

SAP09HP230V1AHSAP12HP230V1AHSAP18HP230V1AHSAP24HP230V1AH

General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.

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