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Enable 16 VDC DC OUT on L2 for Daikin D4 Equipment (CoolMaster EDGE)

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This article applies to the CoolMaster EDGE

Purpose

Enable 16 VDC output on Line L2 of a CoolMaster EDGE so the D3-D4 adapter can power up and communicate with Daikin D4 systems over D3net.

Prerequisites

  • CoolMaster EDGE connected directly to a D3-D4 adapter with no native D3net devices (ODUs, ITMs) on the bus in parallel.
  • Terminal/CLI access to the EDGE (local or via web UI Terminal tab).

Steps

  1. Run info and confirm L2 currently shows 0 V:

    > info
L2 DC- 0V

    Expected response: L2 DC- 0V

    Do not proceed if it already shows 16 V — the bus is already powered.
     

  2. Enable DC output on L2:

    line DCOUT L2 +

    Expected response: OK, Boot Required!
     

  3. Reboot the EDGE:

    boot 2

     

  4. After reboot, run info again and confirm:

    > info
L2 DC+ 16V

     

  5. Wait 10–20 minutes for the D3-D4 adapter to wake up and start sending D4 system data into the EDGE.

Notes

Only enable 16 V when there are no native D3net devices on the bus. If ODUs or ITMs are connected in parallel, they supply their own voltage — enabling DCOUT in that scenario can cause issues.

  • The 10–20 min wait after reboot is normal; the D3-D4 adapter needs time to initialize.
  • If D4 units still don't appear after 20 min, verify wiring to the D3-D4 adapter and re-check info output.
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