This article applies to the following CoolMaster products
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.
The issues are not electrical but logical. The Mitsubishi indoor units are sensitive to the appearance and/or disappearance of control devices connected to the M-net - so these errors are displayed when our CoolMasterNet is first connected.
In some cases, the error messages on the indoor units will disappear automatically after a couple of minutes.
In cases that the error doesn't disappear, the solution is to power reset the Mitsubishi Electric outdoor units and the indoors - we advise leaving them off for about 3-5 minutes before turning them back on. This clear the "memory" of the indoor units. Once they are powered back on, with the CoolMasterNet now connected to the M-Net, the error messages will no longer appear.