Release notes ACC MT
Description: Air Center Control with Touch Display
Software version: 4.0.0
Release date: September 2024
Hardware: 8 733 502 082 and 7 733 701 822

These release notes show an overview about the status of the software including
limitations and known issues of ACC MT software version 4.0.0.

Software Status 4.0.0:
----------------------
Newly added features:
- Full support for AF4300 and AF5301-based systems (incl. Energy Distribution)

Improvements:
- Improved responsive design for PC interface

Limitations / known issues:
---------------------------
General:
- To be able to select a country not yet existent in the pre-installed software version,
  this version must be already installed first. A factory reset is required after a
  software update to reach the installation wizard again to select the country.
- This software can only be installed on ACC already executing 2.0 or higher.
- Sometimes after a scan, the values for indoor units do not get updated on the GUI.
  Workaround: reboot once after scanning via the menu (graceful reboot).
- AF4300 / AF5301 cannot be connected on the same XYE as MDCI/Multi Split/Large Split, or AF5300/AF6300 systems
  This general system limitation means, one XYE port only supports
  - either AF4300 / AF5301 systems
  - or AF5300/AF6300 systems
  - or MDCI/Multi Split/Large Split systems.

Lock manager:
- When changing the lock settings very fast multiple times on the same IDUs, the lock
  status displayed on the ACC may be out-of-sync. For example, the ACC shows no lock, 
  although a lock within the IDU exists (locks are generally stored within the IDUs,
  not within the ACC).
  Work around: E.g. when setting a lock, and unsetting it again on the same IDUs, wait
               at least one minute after the first change before performing the second
               change of the lock settings.

IDU listings:
- Scrolling with a long list of IDUs: Use either scroll bar, or touch the white area left
  of the check boxes or right of the rename icon to scroll instead of drag-n-drop.

Fault and event history
- In rare cases (more than one error of a single system device), already solved errors on
  IDU side still show as pending error within the fault and event history. If this is the
  case, please clear the fault and event history.

MDCI:
- General system limitation
  - Dry mode can be enabled on all controls (ACC MT, ARC and IRC) for IDUs connected to
    MDCI systems, but response to ACC MT is always cooling mode. This means, after some
    seconds, ACC MT will show cooling mode instead of dry mode.
  - Only mode and IRC lock are possible, although others like ARC lock are now offered by
    the ACC MT, those locks are non-functional in MDCI systems.
  - IDUs which are in mode conflict are shown as "off" on ACC MT.
  - ACC MT shows always the default icon "4-way cassette IDU", independent from the real
    IDU type.
  - The current outdoor temperature display is not available.
  - System structure: No outdoor unit information available.
  - System monitor: No diagnosis data available for MDCI systems.
- Limitations depending on ODU firmware
  - Although the ACC offers seven fan speeds, those may be mapped to three fan speeds
    in case the ODU executes an old firmware (update not possible). Use of seven fan
    speeds via the ARC and IRC still possible.

Climate 5000L / Climate 5000M
- ACC MT shows always the default icon "4-way cassette IDU", independent from the real
  IDU type.
- Although the ACC offers seven fan speeds, those are be mapped to three fan speeds.
  Use of seven fan speeds via a local control is still possible.

Energy distribution:
- In case of a broken Modbus/RTU connection to a energy meter, the energy distribution
  report may need manual correction.
- Energy distribution is not available for MDCI/Multi Split/Large Split

Contact:
--------
In case of facing abnormalities and limitations which are not recoverable by the
resolutions offered in this document, please contact your regional sales department.