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Gree 3VIR18HP230V1A Error Codes

Updated · by Aurora Star Tech Inc.

Gree 3VIR18HP230V1A error codes and diagnostic codes (also listed as 3VIR18HP230V1AH, 3VIR18HP230V1AO). The 3VIR18HP230V1A is a Gree heat pump in the Gree Vireo GEN3 series.

Homeowner with a heat pump problem? Call (647) 657-2977 or book a service call — licensed technicians across Vaughan and the GTA.

Gree 3VIR18HP230V1A error codes list

CodeMeaningSeverity
C5Jumper (capacity) cap missing or badMedium
E1High pressure protectionHigh
E2Indoor coil freeze protection (status)Low
E3Low pressure protectionHigh
E4Compressor discharge temperature too highHigh
E5Overcurrent protection (whole unit)High
E6Indoor/outdoor communication faultHigh
E8High temperature / overload protectionMedium
E9Cold air prevention (status)Low
EEEEPROM / memory chip faultHigh
EUCompressor slowed - module running hotLow
F1Indoor room air sensor open or shortedMedium
F2Indoor coil sensor open or shortedMedium
F3Outdoor ambient sensor open or shortedMedium
F4Outdoor coil (condenser middle) sensor open or shortedMedium
F5Compressor discharge sensor open or shortedMedium
F6Compressor slowed - overloadLow
F8Compressor slowed - high currentLow
F9Compressor slowed - high discharge temperatureLow
FHCompressor slowed - indoor coil anti-freezeLow
FoRefrigerant recovery (pump-down) modeLow
H3Compressor overload protectionHigh
H5IPM (inverter module) protectionHigh
H6Indoor fan motor not running / no feedbackHigh
H7Compressor lost synchronismHigh
JFWiFi module faultLow
L3Outdoor DC fan motor faultHigh
L9Power protectionMedium
LCCompressor failed to startHigh
LPIndoor and outdoor units do not matchMedium
oEUndefined outdoor unit errorMedium
P5Compressor phase overcurrentHigh
P7Inverter module temperature sensor faultMedium
P8Inverter module overheatedHigh
PHDC bus voltage too highHigh
PLDC bus voltage too lowHigh
PUDC bus capacitor charging faultHigh
U1Compressor phase current sensing faultHigh
U3DC bus voltage dropMedium
U5Whole-unit current sensing faultHigh
U7Reversing (4-way) valve faultHigh
U8Indoor zero-crossing signal faultMedium

Troubleshooting the 3VIR18HP230V1A

All Gree Heat Pump error codes →

Homeowner help: AC Running But Not Cooling: What to Check · Heat Pump Not Heating or Blowing Cold Air

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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