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Toyotomi MUL12- FWCA, Service Manual

The Toyotomi MUL12-FWCA Service Manual is a comprehensive guide for maintaining and troubleshooting your Toyotomi air conditioning unit. Download the manual for free from manualshive.com to ensure optimal performance and longevity of your appliance. This detailed manual will help you with installation, operation, and maintenance procedures.

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CONTENTS

PRODUCT  ..................................................................................................................

1 MODELS LIST  .......................................................................................................................

1.1 Outdoor Unit  .................................................................................................................................................

1.2 Indoor Unit ....................................................................................................................................................

2 NOMENCLATURE  ...............................................................................................................

2.1 Nomenclature of Outdoor Unit ....................................................................................................................

2.2 Nomenclature of indoor unit .......................................................................................................................

3 FUNCTION .............................................................................................................................

4 PRODUCT DATA   ..................................................................................................................

4.1 Product data of outdoor ............................................................................................................................

4.2 Product data of indoor .................................................................................................................................

4.3 Working Temperature Range .....................................................................................................................

5 PIPING DIAGRAM ..............................................................................................................

CONTROL ................................................................................................................

1 OPERATION FLOWCHART ...............................................................................................

1.1 Cooling/Dehumidfying Operation ..............................................................................................................

1.2 Heating Operation ......................................................................................................................................

2 MAIN LOGIC ........................................................................................................................

2.1 Control Function of Outdoor Unit ............................................................................................................

2.2 Protection Function  .....................................................................................................................................

2.3 Control Function of Indoor Unit .................................................................................................................

3 REMOTE CONTROLLER ...................................................................................................

3.1  Wired Remote Controller ...........................................................................................................................

3.2 Wireless Remote Controller........................................................................................................................

INSTALLATION ......................................................................................................

1 PRECAUTIONS FOR INSTALLATION  ...........................................................................

1.1 Precautions for Installation ........................................................................................................................

1.2 Key Points of Installation ............................................................................................................................

2 FLOW CHART OF INSTALLATION.................................................................................

3 OUTDOOR UNIT INSTALLATION ...................................................................................

3.1 Before Installation ........................................................................................................................................

3.2 Installation Site .............................................................................................................................................

3.3 Caution for Installation ................................................................................................................................

3.4 Dimension Data  ...........................................................................................................................................

3.5 Installation Clearance Data .........................................................................................................................

4 INDOOR UNIT INSTALLATION ........................................................................................

4.1 Installation of Duct Type..............................................................................................................................

4.2 Installation of Cassette Type........................................................................................................................

4.3 Installation of Floor Ceiling Type ...............................................................................................................

5 REFRIGERATION PIPING WORK ...................................................................................

5.1 Connection between Indoor and Outdoor Units........................................................................................

5.2 Refrigerant Charging and Trial Running  .................................................................................................

Summary of Contents for MUL12- FWCA

Page 1: ...Service Manual MODEL MUL FWCA Series...

Page 2: ...Function of Indoor Unit 3 REMOTE CONTROLLER 3 1 Wired Remote Controller 3 2 Wireless Remote Controller INSTALLATION 1 PRECAUTIONS FOR INSTALLATION 1 1 Precautions for Installation 1 2 Key Points of I...

Page 3: ...ollowing items before contact the maintenance serviceman 7KH FRQGLWLRQV OLVWHG EHORZ DUH QRW FODVVL HG LQWR HUURUV 1 3 Error description 2 FLOW CHART OF TROUBLESHOOTING 3 WIRING DIADRAM 3 1 Outdoor un...

Page 4: ...1 PRODUCT...

Page 5: ...oor Unit 1 2 2 Cassette type Units Series Model Capacity Ref Power Supply Appearance Cooling kW Heating kW Cassette Type Indoor Unit MUL12 FWCA 3 5 3 85 R410A 220 240V 1Ph 50Hz MUL18 FWCA 5 5 50 MUL24...

Page 6: ...uct Type DTA Duct type FWCA Cassette type CON Floor type 3 Cooling Heating H Heat pump 4 Cooling Capacity 12 represents 12000Btu h 1 kW 3 412KBtu 5 Series Series code 6 Power Supply Voltage 220 240V 1...

Page 7: ...r Conditioning Fan operation Mode Auto Swing Controller Timer Selector Auto Mode Operation Cool Mode Operation Heat Mode Operation Dry Mode Operation Fan Mode Operation Sleep mode setting Drain Pump F...

Page 8: ...0 535 Connecting pipe Gas inch PP PP PP Liquid inch PP PP PP Connection method Flare Connection Flare Connection Flare Connection Drain pipe External dia mm 31 31 31 Thickness mm 3 3 3 Outline Dimensi...

Page 9: ...le higher for change of ambient 4 3 Working Temperature Range Indoor side state Outdoor side stae Dry bulb temp Wet bulb temp Dry bulb temp Wet bulb temp Rated Cooling 27 19 35 24 Max cooling 32 23 48...

Page 10: ...the throttling device the temperature and pressure of the refrigerant liquid will further decrease and then go the main valve After that it will be divided and go to the heat exchanger of each indoor...

Page 11: ...11 CONTROL CONTROL...

Page 12: ...op Switch Volume Air Supply Direction Start Indicating Light OFF Stop Yes Yes Start No No Start Indicating Light ON Air Volume Setting Display Displaying Air Supply Direction Setting Display Displayin...

Page 13: ...c Expansion Valve Capacity Control A There Is Not There Is Yes Yes No No Go To The Previous Page Electronic Expansion Valve Close Fan Motor Stop Temperature Adjustment In The Process Of Preventing Res...

Page 14: ...estart Operation 3 Minutes Temperature Adjustment Fan Motor As Per Set Air Supply Speed In The Process Of Preventing Cold Air Electronic Expansion Valve Capacity Control Fan Motor Stop Fan Motor Stop...

Page 15: ...ion the same as those in cooling mode e In dry mode the maximum value A of the capacity requirement percentage of single unit is 90 of that in cooling mode The open condition of the electronic expansi...

Page 16: ...installed indoor units After 3min of energizing if the outdoor unit does not receive the communication data of certain indoor unit the outdoor unit will judge that indoor unit is not installed and wi...

Page 17: ...d at 16 it will activate the IRUFLEOH GHIURVWLQJ E SUHVVLQJ WKH DQG EXWWRQV DOWHUQDWHO WKUHH WLPHV LQ YH VHFRQGV RZ WR TXLW WKLV IXQFWLRQ WKH IXQFWLRQ ZLOO TXLW ZKHQ WKH PRGH RI LQGRRU XQLWV FRQ LFWV...

Page 18: ...ent temperature is higher than the set temperature plus 3 the fan will run at the high speed Under the FAN mode The fan will run at the medium speed constantly Once the fan starts its speed can not be...

Page 19: ...the sleep curve set last time displayed at the temperature area 3UHVV DQG WR FKDQJH WKH VHW WHPSHUDWXUH 3 Press the Timer button to increase the time by one hour and the sleep curve temperature set l...

Page 20: ...ndoor unit Under the COOL HEAT DRY or FAN mode the return air temperature sensor is adopted while under the HEAT mode it is the receiver temperature sensor RU WKH FDVVHWWH W SH RRU FHLOLQJ W SH LQGRRU...

Page 21: ...function to automatically blow off the moist inside the exchanger of the indoor unit to prevent mould growing after the unit is shut off a On condition that this function is activated when the On Off...

Page 22: ...is unit 6 Lock function 7 High middle low or auto fan speed of the indoor unit 8 SHIELD Shield functions buttons temperature On Off Mode or Save is shielded or Save is shielded by the remote monitor 9...

Page 23: ...2 6 Upon startup of the unit without malfunction or under off state of the unit press them at the same time for 5s to enter the lock state in which case any other buttons won t respond the press Repre...

Page 24: ...ng mode the temperature may be set at 16 or between 17 20 21 27 or 28 30 For example the temperature in the Heating mode is set at 22 Under the mode of Sleep2 the temperature will decrease by 1 every...

Page 25: ...ress Function till the unit enters the Blow setting interface and then press Enter Cancel to active this function When the Blow function is activated press Function to the Blow setting interface and t...

Page 26: ...Errors If there is an error occurring during the operation of the system the error code will be displayed on the LCD If multi errors occur at the same time their codes will be displayed circularly No...

Page 27: ...ff can be selected by pressing this button After powered on the default is Sleep Off After the unit is turned off the Sleep function is canceled When the sleep function is set already the symbol will...

Page 28: ...oor set temperature SWING UP DOWN The swing angle which circularly changes as below can be selected by pressing this button This kind of remoter controller is universal And the three swing statuses of...

Page 29: ...ERHEAT BLOW Under the Heat mode or Auto Heat mode if the unit is turned off the compressor and outdoor fan will stop running immediately and the upper and lower guide board will rotate to the horizont...

Page 30: ...54 MAINTENANCE...

Page 31: ...d window Direct sunlight Hang a curtain or blinds over the window Too much people in the room Too much heat sources in the room Reduce the heat sources LUW OWHU VFUHHQ OHDQ WKH OWHU VFUHHQ Note If the...

Page 32: ...pen circuit of the temperature sensor at the midway of the condenser coil for the commercial unit Short open circuit of the temperature sensor at the midway of the condenser coil for the commercial un...

Page 33: ...voltage protection PH Flash 3 times Flash 3 times Flash 3 times oE oE Abnormal AC input voltage PP Flash 3 times Flash 3 times Flash 3 times oE oE Capacitor charging error Capacitor charging error PU...

Page 34: ...t pipe outlet temperature sensor error 23 Unit B indoor unit pipe outlet temperature sensor error 33 Unit C indoor unit pipe outlet temperature sensor error 14 Unit A indoor pipe inlet temperature sen...

Page 35: ...4 5E 05 Indoor unit gas pipe connection error or component error Unit which is detecting 5P 01 5P 02 5P 03 5P 04 5P 05 Outdoor Unit MUL36INV 4 and MUL42INV 5 Note Refer to the real products for the ex...

Page 36: ...y check the inlet and outlet of main pipe connecting with each indoor unit and capillary of indoor and outdoor units Replace the parts like filter capillary and so on Check if indoor unit fan and outd...

Page 37: ...ch is normal Replace the outdoor unit mainboard Replace pressure switch Check if operation mode of indoor unit is properly set N N Y Y Y Y Check if gas valve and liquid valve are completely open Refer...

Page 38: ...nsor s resistance value is correct Replace relevant discharge temperature sensor N Y Replace the outdoor unit mainboard Malfunction display E5 Compressor Overheat Abnormal overcurrent Check if compres...

Page 39: ...n board of the indoor uint N Y Check the liquid level switch Check if the voltage of water drainage pumpend is ok Check the cables of water drainge pump Replace the main board of the indoor uint N Y M...

Page 40: ...Y Y Replace mainboard of the indoor uint Check the direction of the plug and socket Replace temperature sensor Malfunction display F5 Failure of Exhaust Temp Sensor Check if the plug of the temperatur...

Page 41: ...66 MAINTENANCE 3 2 Indoor unit 3 2 2 Cassette type MUL12 FWCA MUL18 FWCA MUL24FWCA...

Page 42: ...Q WKH EROWV LQJ WKH IDQ 4 Remove the fan 5HPRYH WKH IDQ RRVHQ WKH VFUHZV LQJ WKH PRWRU 8VH VFUHZGULYHU WR ORRVHQ WKH VFUHZV LQJ WKH PRWRU 6 Remove the motor and replace it 5HPRYH WKH PRWRU DQG UHSODFH...

Page 43: ...hese screws 2 Loosen the screws fixing the water pump 3XOO RXW WKH ZDWHU RXWOHW SLSH and use screwdriver to loosen the VFUHZV LQJ WKH ZDWHU SXPS 4 Take out the pump and replace it 7DNH RXW WKH SXPS an...

Page 44: ...91 MAINTENANCE 5 2 2 Cassette type MUL12 FWCA...

Page 45: ...21 1 18 Diversion Circle 10372701 1 19 Electric Box Assy 01399519 1 20 Terminal Board 42011222 1 21 Transformer 43110233 1 22 Electric Box Cover I 20102702 1 23 Electric Box Cover Sub Assy1 20122054 1...

Page 46: ...93 MAINTENANCE MUL18 FWCA...

Page 47: ...21 1 18 Diversion Circle 10372701 1 19 Electric Box Assy 01399519 1 20 Terminal Board 42011222 1 21 Transformer 43110233 1 22 Electric Box Cover I 20102702 1 23 Electric Box Cover Sub Assy1 20122054 1...

Page 48: ...95 MAINTENANCE MUL24 FWCA...

Page 49: ...1074042 1 14 Filter Sub Assy 07210028 1 15 Drain Hose Sub Assy 05232702 1 16 Water Tray Assy 20182701 1 17 Electric Base Plate 01412721 1 18 Diversion Circle 10372701 1 19 Electric Box Assy 01399520 1...

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