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Mitsubishi Electric PAC-YT34STA Instruction Book

Air conditioning control system.
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  • Page 2: Table Of Contents

    CONTENTS Page 1. Safety Precautions ··················································································································· 2 2. Names and functions of each part ···························································································· 4 2-1. Appearance·················································································································································4 2-2. Display sections ··········································································································································5 2-3. Operation section········································································································································6 2-4. Screen configuration ···································································································································7 3. Outline of schedule setting and operation················································································· 8 3-1. Outline of setting ·········································································································································8 3-2.
  • Page 3 Touching the controller with wet hands could result in electric shocks or faults. Do not use for special applications. This product is intended for use with the Mitsubishi Electric building air conditioning control system. Do not use for the control of other air conditioners or for other applications.
  • Page 4: Names And Functions Of Each Part

    OPERATION ON/OFF MODE CLOCK TEMP. CLEAR SCHEDULE TIMER PAC-YT34STA 1. COLLECTIVE/GROUP DISPLAY Indicates which mode is selected: COLLECTIVE: [COLLECTIVE STATUS DISPLAY Screen] GROUP: [GROUP STATUS DISPLAY Screen] 2. COLLECTIVE ON/OFF LAMP ON: One or more group is running (Also ON when a sequential unit is running)
  • Page 5: Display Sections

    2-2. Display sections 1. SCHEDULE PATTERN No. The selected group's weekly schedule pattern No. is displayed. The selected schedule pattern No. is displayed. 2. MONITOR/PROGRAM/WEEKLY PROGRAM DISPLAY Monitor display: [PROGRAM MONITOR screen] Program display: [PROGRAM SETTING screen] Weekly program display: [WEEKLY PROGRAM SETTING screen] 3.
  • Page 6: Operation Section

    MODE CLOCK TEMP. CLEAR SCHEDULE TIMER PAC-YT34STA 1. GROUP SELECT SWITCH Press this to call the required group screen when making various settings. 2. MONITOR/SET SWITCH Use this switch to change between the [NORMAL SCREEN], [PROGRAM MONITOR SCREEN], [PROGRAM SETTING SCREEN] and [WEEKLY PROGRAM SETTING SCREEN].
  • Page 7: Screen Configuration

    2-4. Screen configuration (2) GROUP SETTING SCREEN (page 19) (1) POWER ON screen When this controller is master No time setting (3) TIME/DAY SETTING SCREEN (page 12) When time is set No time setting (4) NORMAL SCREEN (page 10) When time is set (5) PROGRAM MONITOR SCREEN (page 11) (6) PROGRAM SETTING SCREEN (7) WEEKLY PROGRAM...
  • Page 8: Outline Of Schedule Setting And Operation

    3. Outline of schedule setting and operation 3-1. Outline of setting The schedule is set with this controller using the following procedures. 1. Setting of current time and day 2. Setting of program Set the schedule pattern. (Up to nine types of operations patterns with 16 operations in each pattern can be set.) [Setting example] Set details...
  • Page 9: Schedule Operation

    3-2. Schedule operation This controller carries out schedule operation at each set time. [Operation example] The schedule operation for pattern 1 given as an example in step 2. Setting of program on the previous page is explained in this section. 8:15 - Start cooling operation at 29°C.
  • Page 10: Operation Methods

    4. Operation methods 4-1. Normal screen (COLLECTIVE/GROUP STATUS DISPLAY SCREEN) • Display Schedule pattern for each group (Only on the Group Status Display screen). * Current time/day * Air conditioner ON/OFF state * Limits and prohibit states set from other system controllers * Control state •...
  • Page 11: On/off Operations

    4-1-2. ON/OFF operations (1) Select the group of collection state to be operated with the step "Group selection operation" above. (2) Press the switch. ON/OFF will appear at the ON/OFF status display when the controller is running. Nothing will appear when the controller is stopped. 4-1-3.
  • Page 12: Time/day Setting Screen

    4-3. TIME/DAY SETTING screen • The current time and day are set and changed on this screen. • A time notification can be issued. (A time notification is issued to collectively set the current time of system controllers and remote controllers having a clock function.) The set day flickers.
  • Page 13: Setting The Program

    4-4-1. Setting the program (1) Open the PROGRAM SETTING screen. Press the switch on the PROGRAM MONITOR screen. ("PROGRAM" will MONITOR/SET flicker at the upper left when this screen is opened.) If no operations are made on this screen for ten minutes, the display will switch to the Normal screen.
  • Page 14: Deleting An Operation Setting

    2. Set the item to be prohibited. (The item can be set by simultaneously pressing the switch for the item to be set while " " flickers.) To prohibit ON/OFF : Press the switch. The ON/OFF display will change. ON/OFF To prohibit operation mode changeover : Press the switch.
  • Page 15: Setting The Operation Pattern

    4-5-1. Setting the operation pattern (1) Open the WEEKLY PROGRAM SETTING screen. Press the switch on the PROGRAM SETTING screen. MONITOR/SET ("WEEKLY SET" will flicker on the left of the screen when the screen changes.) If no operations are made on this screen for ten minutes, the display will switch to the Normal screen.
  • Page 16: Troubleshooting

    5-2. When only the "Error Code" is flickering • The air conditioner will continue running, but there may be a problem. • Check the error code and call your nearest MITSUBISHI ELECTRIC supplier or dealer. The maintenance code flickers. The selected group No. is displayed.
  • Page 17: External Input And Output Functions

    6. External input and output functions When using the external input and output cables provided with the remote controller. (5-wire cable for input and 4-wire cable for output are provided.) 6-1. External input 6-1-1. Emergency stop input mode • If an emergency stop signal is input in the external input interface, all air conditioners and LOSSNAY units being controlled will stop.
  • Page 18: On/off, Operation Prohibit/permit Pulse Input Mode

    6-1-3. ON/OFF, operation prohibit/permit pulse input mode • If the ON/OFF signal is input in the external input interface, all air conditioners and LOSSNAY units being controlled will be turned ON or OFF. • If the prohibit/permit signal is input in the external input interface, the slave system controller and local remote controller operations will be prohibited or permitted.
  • Page 19: Initial Settings

    7. Initial settings • When connecting multiple system controllers, designate the system controller with many functions as the "master", and set the system controllers with few functions as the "slaves". (Refer to section 8. Setting the functions, "8-1 Using with master system controller" for details on the "master/slave"...
  • Page 20 This controller’s own address will flicker for two seconds. Own address display screen Initial Setting Mode Screen (Group Setting Screen) Carry out steps 7-1-1 to 7-1-2 from the state shown above. (4) Cancel the initial setting mode. • After setting the group and the interlocked unit, hold down the TEMP. switches CLEAR simultaneously.
  • Page 21: Setting The Group

    7-1-1. Setting the group • Register the indoor unit, LOSSNAY, slave system controller and local remote controller for each group. (Register the LOSSNAY to be interlocked with the indoor unit using the interlocked unit setting.) 1. Select the group. 2. Select the unit. 3.
  • Page 22 2. Selecting the unit (1) Select the unit to be registered in the group selected in step 1. • The address No. displayed in the operation No. display section will change in the following order each time the TIME switch is pressed. (The numbers will change in 10-unit increments when the switch is held down.) •...
  • Page 23 4. Searching for registered units The address numbers of all units registered in a group can be checked. (1) Using step 1, select the group to be searched. (2) The address numbers of the registered units will appear in order of smallest number each time switch is pressed.
  • Page 24: Setting The Interlocked Units

    7-1-2. Setting the interlocked units • Set that units interlocked with each group can be run in linked. • Set the interlocked unit after setting each group. The interlocked units cannot be set until the units are registered in the group in which interlocked units are to be set.
  • Page 25 2. Selecting the group No. (1) Call the Group No. • Call the group No. in which the interlocked unit is to be registered. Use the same operations as section 7-1-1. (1) Select the group. • Select the group with the GROUP switches.
  • Page 26 5. Registering the interlocked unit (1) When the switch is pressed in the state shown in step 4, the interlocked unit will be ON/OFF registered as interlocked to the displayed indoor unit. • The following type of display will appear when the unit is correctly registered. The address No.
  • Page 27 The following details are searched for. Press switch once. PROHIBIT Indoor unit address 001 and attributes Interlocked unit address 030 and attributes Press switch once. PROHIBIT Interlocked unit address 030 Indoor unit address 002 and attributes and attributes Press switch once. PROHIBIT (3) When no unit is linked to the interlocked unit Operation No.
  • Page 28: Collective Deletion

    "master", and the system controller with few functions is designated as the "slave". The "master/slave" functions of the system controller used together are as follows. The functions have a priority in order of G-50A (MJ-103MTR-A) > PAC-SF44 SRA > PAC-YT34STA > PAC-YT40ANRA > PAC-SC30GRA > LMAP02-E. Setting details...
  • Page 29: Using The External Input/output Function

    8-2. Using the external input/output function Prepare an external input/output adaptor to use the external input/output function. This function cannot be used when the "local remote controller operation prohibit" is set to prohibit. Note that the external emergency stop input can be used. (1) External input functions Emergency stop/Normal, ON/OFF and local remote control prohibit/enable control can be applied to all units being controlled by inputting the no-voltage contact signal from an external source.
  • Page 30: System Limits

    9. System limits Master system controller and slave system controller This controller's control range Master system controller control range This controller's control range Unit Unit Unit When this controller is controlled by another system When the system contains only this controller. controller.
  • Page 31: Specifications

    10. Specifications 10-1. Product functions • This controller can control up to 50 air conditioners and LOSSNAY with a daily schedule either collectively or in groups. • This controller has only a schedule setting function and must be used with another system controller.
  • Page 32: Main Specifications

    10-2. Main specifications Item Details Power source 30VDC (supplied from outdoor unit or power supply unit for transmission line (type: PAC-SC34KUA)). Power consumption Working environment conditions Temperature 0 to 40ºC, humidity 30 to 90%RH (with no dew condensation) Weight 0.2kg Outline dimensions (H×W×D) 120 x 130 x 18...
  • Page 33 Setting data record sheet Pattern 1 Pattern 2 Operation Operation Set time Set details Set time Set details Pattern 3 Pattern 4 Operation Operation Set time Set details Set time Set details...
  • Page 34 Setting data record sheet Pattern 5 Pattern 6 Operation Operation Set time Set details Set time Set details Pattern 7 Pattern 8 Operation Operation Set time Set details Set time Set details...
  • Page 35 Setting data record sheet Pattern 9 Operation Set time Set details...

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