Mitsubishi Electric AT-50A Installation Manual Download Page 11

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2-3. Initial Settings

(1) Initial startup settings:

Before turning on the controller, first make sure that the controller, indoor units, and outdoor units have been installed properly according 
to the instructions detailed in the respective manuals. 
Turn on the controller and the units.
• This manual is intended for the first startup after the unit has been shipped from the factory. If the setting has been changed even 

once, the popup window or setting screens explained below may not appear. In this case, see section “Usage-Main Menu Setting” in 
the Instruction Book.

• AT-50A can be used as a Main controller or a Sub controller. At the time of factory shipment, AT-50A is set as a Main controller. The 

Main/Sub setting can be changed on the Initial Settings 1/ Basic System screen from the Service menu. (Refer to section  2-3(2)-1 for 
details.)

• Change the Main/Sub setting BEFORE making other initial settings, otherwise some saved information will be lost upon restart after 

the setting is changed.

<When a popup message “Make a setting from Initial Settings 
1.” appears>

(c) Press the OK button to close the popup window and display the 

Service Menu screen.

(d) Touch the Initial Settings 1/ Basic System button to make a 

setting. (Refer to section 2-3(2)-1 for details about Basic 
controller settings.)
Save the settings, and go back to the Service Menu.

(e) Touch the Initial Settings 2/ Groups button to make a setting. 

(Refer to section 2-3(2)-2 for details about Group settings, 
2-3(2)-3 for details about Interlocked settings.)
Save the settings, and go back to the Service Menu.

(f) Touch HOME button [

] to bring up a popup confirmation 

screen. 
Press the OK button to begin the communication.

(g) The message (shown above) will appear on the screen, 

displaying the initialization progress. When initialization is 
complete, the screen will automatically return to the HOME 
screen. 
(Initialization will take up to five minutes.) 
* To change settings later, perform a test run, or verify the 

maintenance information.

1

Touch MAIN MENU button [

] on the HOME screen. 

2

Touch SERVICE MENU button [

] on the Main Menu 

screen.

3

Enter the password to log on to the Service Menu screen. 
(Refer to section 2-3, 2-4, and 2-5.)

<When a popup message “Make a group setting using the 
Main controller. When the group setting has been made, reset 
the power to the Main controller.” appears>

(c) While the popup message is displayed, the unit communicates 

with the main controller. The popup window will close when the 
communication is completed.
* To change the settings, press the Cancel button while the 

popup window is displayed. The Initial Settings 1/ Basic 
System screen will appear. If Basic controller settings are not 
made yet, change the settings.

(d) The message (shown above) will appear on the screen, 

displaying the initialization progress. When initialization is 
complete, the screen will automatically return to the HOME 
screen.
(Initialization will take up to ten minutes.) 
* The group name needs to be set on the Sub controller after 

normal startup, as it cannot be sent from the Main controller. 
Refer to the Instruction Book for details.

(a) The Language screen will appear.

1

Select the display language.

2

Touch the button to select the 
language of your choice. 

3

Touch the OK button.

(b) The Date and Time screen will appear. 

1

Set the current date on the Date tab, and set the current time on the Time tab, 
using the 

 and 

 buttons to change the values.

2

Click on the checkbox next to the date/time format of your choice. 

3

Touch the Save button to save the settings.

Summary of Contents for AT-50A

Page 1: ...ctric shock malfunctions smoke or fire do not operate the switches buttons or touch other electrical parts with wet hands To reduce the risk of injury or electric shock before spraying a chemical around the controller stop the operation and cover the controller To reduce the risk of injury or electric shock stop the operation and switch off the power supply before cleaning maintaining or inspectin...

Page 2: ...ical noise interference To reduce the risk of electric shock shorting or malfunctions keep wire pieces and sheath shavings out of the terminal block To reduce the risk of shorting current leakage electric shock or malfunctions keep the cables out of contact with controller edges To reduce the risk of electric shock malfunctions or fire seal the gap between the cables and cable access holes with pu...

Page 3: ...e controller 1 2 6 Installation Manual This manual 1 7 Instruction Book 1 8 CD ROM Instruction Book Installation Manual 1 2 Mounting bracket 1 AT 50A Power LED Touch panel For connection to the M NET A B Terminal for connection to the M NET cable non polarized External output adapter cable access hole External input adapter cable access hole Controller cover mounting screw SD memory slot for progr...

Page 4: ...or units apply An M NET interface sold separately is required 1 50 M NET remote controller Assign an address that equals the address of the main indoor unit with the lowest address in the group plus 100 Add 150 instead of 100 to set a sub remote controller 101 200 Sub system controller Assign an address that equals the lowest number of the group to be controlled plus 200 201 250 DIDO PAC YG66DCA A...

Page 5: ...nsure the M NET transmission cables and external input output cables are long enough to reach the controller Have extra cables to extend these cables as necessary To install the controller according to the instructions provided in sections a and b 1 above Include an extra 30 cm 12 in of cable to provide adequate slack in the cable Remove the sheath on the M NET transmission cable up to 20 cm 8 in ...

Page 6: ...the terminal block M NET transmission cable is non polarized Insert the cables in the groove on the controller so they will not be pinched when the cover is installed To route the cable along the wall surface Secure the cables in place with a cable cover and seal the gap between the cable cover and the controller with putty 5 Replace the cover Snap the cover into place and attach it to the control...

Page 7: ...ue between 0 2 and 1 seconds 4 Sample circuit recommended Mode External input signal setting Notes 1 Do not use external input Factory setting 2 Emergency stop Normal operation signal level signal When the units are not operating after receiving an emergency stop signal the ON OFF operation from the local remote controller will not be allowed and the ON OFF and Prohibit Permit settings on the AT 5...

Page 8: ...during operation The maximum length of extension cable is 10 m 32 ft Use a cable of 0 3 mm 22AWG or thicker Insulate the area with vinyl tape where the controller cable and the extension cable are connected Relays lamps diode extension cables are field supplied Note The AT 50A has a slot for an SD memory card at the bottom that can be used to update software Refer to the Installation Manual for th...

Page 9: ... ON OFF Mode Set Temp and Filter Reset 12 External input mode Selects the external input mode 12 Filter sign Displays or suppresses the Filter sign on the HOME screen 12 Dry mode Includes or excludes Dry mode as an option for the operation mode 12 Set temperature range Schedule 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 a...

Page 10: ...enu Touch or HOME screen GRID zoom out view GRID zoom in view LIST view GROUP view Main Menu screen Login Page screen 1 Password Change screen Service Menu Service Menu screen Initial settings 1 Basic system Initial settings 2 Groups Groups Interlocked LOSSNAY Delete All System view Malfunction log Gas Amount Check Maintenance Test run Software update Button name Main Menu Service Menu Password Ch...

Page 11: ...begin the communication g The message shown above will appear on the screen displaying the initialization progress When initialization is complete the screen will automatically return to the HOME screen Initialization will take up to five minutes To change settings later perform a test run or verify the maintenance information 1 Touch MAIN MENU button on the HOME screen 2 Touch SERVICE MENU button...

Page 12: ...o ON OFF Mode Set Temp and Filter Reset External Input Mode 1 Press the External Input setting button labeled 1 in the figure to select between Not used Emergency Stop Level signal ON OFF Level signal and ON OFF Prohibit Permit Pulse signal Refer to the Installation Manual for detailed information on how to connect the AT 50A to external devices Filter Sign Display 1 Press the Filter Sign Display ...

Page 13: ...up Indoor units LOSSNAY units and general equipment cannot be combined in one group General equipment groups cannot include remote controller or system controllers Touch Page turn button to turn the pages and follow the directions below to make the settings for each group Group Name 1 Touch the Group Name Input button labeled 1 in the figure and enter the group name in the screen up to 16 characte...

Page 14: ...he Initial Settings 2 Groups button on the Service Menu and then touch the Interlocked LOSSNAY button on the Initial Settings 2 Groups screen to access the Interlocked LOSSNAY screen 1 Touch the LOSSNAY button labeled 1 in the figure On the popup window that appears check the address of the ventilation units to be interlocked with the operation of the indoor units 2 Touch the Interlocked indoor un...

Page 15: ...at support the test run function 2 Operation mode Touch this button to switch the operation mode 3 Pipe temperature The pipe temperature of the indoor unit with the lowest address in a given group will appear 4 Advanced settings Touch this button for advanced settings Display Function A Indoor temperature Indoor air temperature will appear B Unit address up down arrows Use the up down arrows to se...

Page 16: ... OK button If the message The DIP switch 4 is set to OFF appears check to make sure that the DIP switch 4 is turned to ON The DIP switch is located at the left bottom of the controller under the cover 4 Touch the OK button on the confirmation screen 5 Touch the OK button on the popup message to begin the update process 6 The lit LEDs on the three buttons F1 F2 and Collective ON OFF will indicate a...

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