Mitsubishi Electric Y Series Manual page 201

Controls 50 indoor units
One screen shows the operation conditions of 50
connected indoor units.
Weekly and daily schedules
5 daily schedule patterns and 12 weekly schedule patterns
(max. 16 settings per pattern).
Two types of weekly schedules can be set.
System changeover
Operation mode can be switched depending on the indoor
temperature setting and target temperature of each group or
a representative indoor unit.
Functions
[Basic Functions]
▪ ON/OFF ▪ Operation mode switching
▪ Temperature setting ▪ Fan speed setting
▪ Airflow direction setting ▪ Louver setting
• Functions
Item
The ON/OFF, operation mode, setting temperature, fan speed, air direction, filter sign reset operations, and timer
using the local remote controllers can be prohibited.
Permit / Prohibit
Only ON/OFF and filter reset can be prohibited for the Lossnay group.
*The settable items vary depending on the models.
The operation lock can be set to the input operation of the AT-50B.
Each button can be set. (Function Button 1, Function Button 2, Collective ON/OFF, Touch Panel)
Operation lock
Each function can be set. (Operation mode, Setting temperature, Fan speed, Menu button)
The password for the lock release can be set.
When an error is occurring on an air conditioner unit, the affected unit and the error code are displayed.
* When an error occurs, the "ON/OFF" LED flashes. The operation monitor screen shows an abnormal icon over the
Error display
unit. The error monitor screen shows the abnormal unit address and error code. The error log monitor screen shows
the time and date, the abnormal unit address, error code, and source of detection.
Switches the mode "Bypass/Heat recovery/Auto" for Lossnay groups.
Ventilation (independent)
The Lossnay will run in interlock with the operation of the indoor unit.
Ventilation (interlocked)
The mode cannot be changed. The LED will turn ON during operation after interlocking.
Temperature set Batch-setting to temperature range limit in cooling, heating, and auto modes.
limitation This function cannot be used with the MA remote controller. (Depends on the indoor unit model.)
When set as the main controller, operation of the following modes with the local remote controllers can be prohibited:
Specific mode operation
When cooling is prohibited: Cooling, dry, automatic can not be chosen.
prohibit (Cooling prohibit,
When heating is prohibited: Heating, automatic can not be chosen.
heating prohibit, cooling/
When cooling/heating is prohibited: Cooling, dry, heating, automatic can not be chosen.
heating prohibit)
The following input with level signals or pulse signals are available.
Level signal: "Emergency stop input" or "Collective ON/OFF"
Pulse signal: "Collective ON/OFF" or "Local remote controller prohibit/permit"
External input
One input can be selected from those above.
(Emergency stop input, etc.)
* An external input/output adapter (PAC-YT51HAA (sold separately)) is required.
Relays and DC power supply or other devices must be prepared at the site.
"ON/OFF" and "error/normal" are output with the level signal.
External output
* An external input/output adapter (PAC-YT51HAA (sold separately)) is required.
(Error output, operation output)
Relays and DC power supply or other devices must be prepared at the site.
Use this function to check for a refrigerant leak from the outdoor unit.
Checking the Gas Amount * When this function is used, the gas amount checking function of the outdoor unit cannot be used.
This function is for CITY MULTI R2 and Y (PUMY is excluded.) Series only.
Weekly schedule setting of up to 12 patterns is available.
In one pattern, up to 16 settings of "ON/OFF", "Operation mode", "Set Temperature", "Fan speed", "Air flow direction",
Schedule operation
and "Permit / Prohibit local operation" can be scheduled.
Two types of weekly schedules (Summer/Winter) can be set. Today's schedule allows setting of up to 5 patterns.
* Depending on the installation conditions, power supply unit (PAC-SC51KUA) is required. Please contact your local distributor or MITSUBISHI ELECTRIC branch office for further information.
CENTRALISED REMOTE CONTROLLER
Night setback
When the room temperature goes outside a certain range
during a prespecified time period, this heating or cooling
operation is automatically activated to prevent dew
condensation or an excessive temperature increase in the
room.
21°C/69°F
Room Room
Lower
temperature temperature
temperature
limit
12°C/53°F
Heating Heating
Off
On
21°C/69°F
When the temperature drops below the lower temperature limit
(heating control)
Main system controller/Sub system
controller
The AT-50B can be used as the main or sub system
controller. When it is connected to a system controller such
as the AE-200E, it is used as a sub controller. When
multiple units of the AT-50B are connected, the main and
sub controllers can be specified.
Simple button arrangement
The F1 (Function 1) and F2 (Function 2) buttons can be
set as a run button for the following collective operations.
(Setback/Schedule/Operation mode/Temperature
correction/Disable remote controller operation)
: Each unit : Each group
Description
Setback operation
stops (when the
temperature rises
Setback
3°C/5.4°F or the
operation
control time is
starts
over)
Heating Heating
Off
On
21°C/69°F
12°C/53°F
Setback control time
: Group or collective : Not available
Operations Display
X
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