Gree Error Code nU: Cancel indoor long-distance shielding (factory function) (Heat Pump)
Gree error code nU on a heat pump means: Cancel indoor long-distance shielding (factory function). It is also called Gree diagnostic code nU.
Homeowner? What Gree code nU means for you
Usually minor Your heat pump is reporting: Cancel indoor long-distance shielding (factory function). This code is usually informational or minor. The safe checks below often clear it; call us if it keeps showing up.
Safe things you can check yourself
- Check the thermostat: right mode (Heat or Cool), set a few degrees past room temperature, and fresh batteries if it uses them.
- Check both breakers and the outdoor disconnect box beside the outdoor unit; all should be ON.
- Look at the air filter. If it is grey and clogged, replace it; a blocked filter causes many shutdowns.
- In winter, keep snow and ice off and away from the outdoor unit. A short defrost cycle with steam is normal.
- Try one reset: turn the power off for 30 seconds, then back on. If the code comes back, stop resetting and call a technician.
Call (647) 657-2977Book a service call
Licensed technicians serving Vaughan, Toronto and the GTA.
What does Gree error code nU mean?
nU is listed as a function code that removes the long-distance shielding command from the indoor unit. The manual states it needs factory direction.
Applies to: Gree GMV6 Ultra Heat Mini VRF 36-60k (GMV-V..WL/C-T(U))
Gree models that use code nU
GMV-V36WL/C-T(U)GMV-V48WL/C-T(U)GMV-V60WL/C-T(U)
Other Gree Heat Pump codes
All Gree Heat Pump error codes →
Gree code nU: homeowner questions
What does Gree code nU mean?
Cancel indoor long-distance shielding (factory function). nU is listed as a function code that removes the long-distance shielding command from the indoor unit. The manual states it needs factory direction.
Is it safe to keep using my heat pump with code nU?
Usually yes. Code nU is normally minor, but if it keeps coming back have it checked.
Can I reset Gree code nU myself?
You can try one reset (power off for 30 seconds, then on). If Gree code nU comes back, the cause is still there and a licensed technician should check it.
Who can fix Gree code nU near me?
Aurora Star Tech Inc. repairs Gree heat pumps in Vaughan, Toronto and across the GTA. Call (647) 657-2977 or book a service call online.
Homeowner help: AC Running But Not Cooling: What to Check · Heat Pump Not Heating or Blowing Cold Air
Troubleshooting guides
- Cap the maximum output (function n4) Gree · Heat Pump
- Compressor will not run - Gree ductless Gree · Heat Pump
- Force a defrost cycle from the remote Gree · Heat Pump
- Force a defrost from the outdoor board (function n3) Gree · Heat Pump
- Limit the whole system to heating, cooling or fan only (function A6) Gree · Heat Pump
- Louver will not swing - Gree ductless Gree · Heat Pump
- Noise or vibration - Gree ductless Gree · Heat Pump
- Offset indoor engineering numbers (function n5) Gree · Heat Pump
- Outdoor fan will not run - Gree ductless Gree · Heat Pump
- Read live running parameters of an outdoor module (function n7) Gree · Heat Pump
- Read or clear the fault history (function n6) Gree · Heat Pump
- Restore system defaults from the outdoor board (0C) Gree · Heat Pump
- Run the outdoor commissioning sequence (steps 01 to 17) Gree · Heat Pump
- Set automatic energy saving (function n0) Gree · Heat Pump
- Set outdoor silence mode (function A7) Gree · Heat Pump
- Show indoor engineering numbers on the indoor units (function n8) Gree · Heat Pump
- Start pump-down (refrigerant recycle) mode, function A2 Gree · Heat Pump
- Start vacuum mode for evacuating pipework (function A8) Gree · Heat Pump
- Unit will not start - Gree ductless Gree · Heat Pump
- View the stored malfunction code on the remote (LIGHT x6) Gree · Heat Pump
- Water leaking from indoor unit - Gree ductless Gree · Heat Pump
- Weak cooling or heating - Gree ductless Gree · Heat Pump
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. Written in our own words as a summary; always check the original manual.
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.