Mitsubishi Electric - 6608 Error code

This article applies to the following CoolMaster products

  • CoolMaster
  • CoolMasterPro 
  • CoolMasterNet
  • CloudBox

6607/6608 is a Mitsubishi Electric error code when adding/removing a controller.

There might be cases where Error codes 6607 / 6608 will appear, when CoolMaster/CloudBox is added (Removed) to (from) Mitsubishi Electric VRF system,  on the wired remotes.


In some cases, the error will disappear by itself after a couple of minutes.

In cases that the error doesn't disappear, the solution is to power reset outdoors+indoors.

The issues are not electrical but logical. Mitsubishi units are sensitive to the disappearance devices connected to MNet after CoolMaster / CloudBox are connected.

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