HVACopediaGree · Heat pump
04/00-16 Commissioning step 04: indoor unit quantity
What the display is showing
Step 04 shows the number of indoor units found, from 00 to 16. If the figure does not match the number installed, cut power to the indoor and outdoor units and check the indoor communication wiring, then restart commissioning from step 01. If it is correct, press SW3 on the main board to confirm and 04/oC follows.
Applies to: Gree GMV6 Ultra Heat Mini VRF 36-60k (GMV-V..WL/C-T(U))
What to do
- Compare the count with the units installed.
- If correct press SW3 to confirm; if not, power down, fix the communication wiring and restart from step 01.
Models that show this code
3 models in Gree GMV6 Mini VRF
Other codes on the same units
- 0C Defaults restored (reset in progress)
- 03/01 Commissioning step 03: confirming outdoor unit quantity
- 06 Commissioning step 06: checking outdoor components
- 07 Commissioning step 07: checking indoor components
- A0 Waiting for commissioning (status)
- A2 Pump-down (refrigerant recycle) mode
- A3 Defrosting
- A4 Oil return
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Source: Gree GMV6 Ultra Heat Mini VRF 36-60k (GMV-V36-48-60WL-C-T(U)) service.pdf - section 3.2.2.2 Test Operation and Debugging. Summarized in our own words; check the original manual for your model.
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.