Gree Heat Pump: Force a defrost from the outdoor board (function n3)
Force a defrost from the outdoor board (function n3) on a Gree heat pump: Forces a defrost during maintenance; the system leaves it on its own when the normal exit conditions are met.
Applies to: Gree GMV6 Ultra Heat Mini VRF 36-60k (GMV-V..WL/C-T(U))
How to fix force a defrost from the outdoor board (function n3): step by step
- Open the function menu: power the system, then hold SW1 on the master outdoor board for over 5 seconds.
- Pick the function with SW1 (up) and SW2 (down), confirm with SW3.
- SW4 steps back or exits; with no key pressed for 5 minutes the board leaves the menu by itself.
- Select n3 (00 flashes) and press SW3; n3 goes steady.
If the unit shows an error code, look it up: Gree Heat Pump codes
Models
GMV-V36WL/C-T(U)GMV-V48WL/C-T(U)GMV-V60WL/C-T(U)
Source: Gree GMV6 Ultra Heat Mini VRF 36-60k (GMV-V36-48-60WL-C-T(U)) service.pdf - section 4.2.3.7 and 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.