Chapter 2. Initial Setting - Mitsubishi Electric AT-50A Installation Manual

Chapter 2. Initial Setting

This chapter contains information about the settings to be made at the time of installation. Please read the instructions carefully and make
the settings accordingly. Refer to Chapter 1. "Installation" for how to install the AT-50A Advanced Touch Controller, and refer to the air
conditioning unit installation manuals for how to connect the controller cable to the air conditioning units, or how to install the air conditioning
units. Please remember to give all manuals to the end users after installation is complete.
2-1. AT-50A Advanced Touch Controller
Function 1 button with LED
Function 2 button with LED
Power LED
List of functions available under the "Service menu"
Screen Setting
M-NET address
Main system controller/
sub system controller (*1)
Operation prohibit setting
(Used/Not used)
Remote controller access
External input mode
Basic
settings
Filter sign
Dry mode
Set temperature range
(Schedule)
Time notification
Operation mode control
Groups
Group
settings Interlocked operation
Batch deletion (*2)
System view
Malfunction log
Maintenance
Checking the Gas Amount
(*2)
Software update
Test run Test run
(*1) Refer to section 1-5 "Note."
(*2) Available only when AT-50A is set as a main controller.
Sets the M-NET address for the AT-50A.
Set the system controller as the main or sub.
Use to select the type of controller from which to prohibit the access of the local
remote controllers (from other system controllers).
Selects the type of controllers to prohibit access* from (remote controllers only or
both remote controllers and system controllers).
* Access to ON/OFF, Mode, Set Temp, and Filter Reset.
Selects the external input mode.
Displays or suppresses the Filter sign on the HOME screen.
Includes or excludes Dry mode as an option for the operation mode.
Selects the settable temperature range:
Standard: 19°C (67°F) to 28°C (83°F); Low: 8°C (46°F) to 30°C (87°F);
Manual: Settable to any arbitrary range between 8°C (46°F) and 30°C (87°F).
Sends or does not send the clock synchronization signal once a day to the
controllers and units.
Selects the function "System-Changeover" or "Operation Mode Selection Limit".
(*2)
Makes the group settings for the indoor units, LOSSNAY units, DIDO controllers
(PAC-YG66DCA), remote controllers, and sub-system controllers.
Enters the interlock settings between indoor and LOSSNAY units.
Deletes all group and interlock settings collectively.
Displays the information about the indoor units connected to each outdoor unit.
Stores the latest errors. (up to 50)
Use to check for refrigerant leak from the outdoor unit.
Updates software.
Runs a test on the connected air conditioning units.
Function
– 9 –
Collective ON/OFF
button with LED
Touch panel
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