That message means the license on Maintenance Tool version 5.53 has expired. The software isn't broken, and there's nothing wrong with your PC.
Why reinstalling doesn't fix it: mylinkdrive.com is no longer being updated, and it still offers version 5.53. Downloading and installing it again gives you the same expired copy.
The fix: download the current version from MitsubishiPro and install it over the top. You don't need to uninstall 5.53 first.
- A Windows PC with internet access
Step 1: Download Maintenance Tool
Go to the software page on mitsubishipro.com. On the Maintenance Tool card, click Download.
Step 2: Unzip and run the setup
- Extract the zip file you downloaded. Inside are two folders,
MNTTOOLandCMS-MNG-Driver. Open MNTTOOL. You can skipCMS-MNG-Driver: that driver is for the older converter box, and you don't need to install it.
- Run Setup.exe. The PDF next to it is the user manual.
- The Maintenance Tools for .NET setup wizard opens. Click Next and follow it through to the end.
Step 3: Display scale
The first time Maintenance Tool opens, it asks about display scale. Leave it on Disable auto scaling (default).
On a high-resolution screen, like a Microsoft Surface, choose Enable auto scaling instead, or the Maintenance Tool screen comes out too small to use. A scaling change takes effect after you restart Maintenance Tool.
Check This window is not displayed, when starting Maintenance tool in the bottom-left corner, then click OK.
Step 4: Units of measurement
Next comes the units window. Set:
| Temperature | Degrees Fahrenheit |
|---|---|
| Pressure | Pound/inch2 (PSI) |
| Capacity | UL-Model Number |
| Model | Mitsubishi Model |
Check This window is not displayed, when starting Maintenance tool in the bottom-left corner, then click OK.
Next up for this guide: connecting through the M-NET USB converter, running an address search, using the monitoring screen, and setting custom highlights.
It runs alongside Maintenance Tool on the same M-NET USB converter, finds every unit, draws each system, and reads DIP switches, error history and function settings. Free.