Carrier TOSHIBA MMU-UP0071HP-UL Service Manual
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Carrier TOSHIBA MMU-UP0071HP-UL Service Manual

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FILE NO. SVM-22074
SERVICE MANUAL
AIR-CONDITIONER
(MULTI TYPE)
INDOOR UNIT
<4-way cassette type>
MMU-UP0071HP-UL
MMU-UP0091HP-UL
MMU-UP0121HP-UL
MMU-UP0151HP-UL
MMU-UP0181HP-UL
MMU-UP0241HP-UL
MMU-UP0301HP-UL
MMU-UP0361HP-UL
MMU-UP0421HP-UL
MMU-UP0481HP-UL
MMU-UP0541HP-UL
January, 2023

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Summary of Contents for Carrier TOSHIBA MMU-UP0071HP-UL

  • Page 1 FILE NO. SVM-22074 SERVICE MANUAL AIR-CONDITIONER (MULTI TYPE) INDOOR UNIT <4-way cassette type> MMU-UP0071HP-UL MMU-UP0091HP-UL MMU-UP0121HP-UL MMU-UP0151HP-UL MMU-UP0181HP-UL MMU-UP0241HP-UL MMU-UP0301HP-UL MMU-UP0361HP-UL MMU-UP0421HP-UL MMU-UP0481HP-UL MMU-UP0541HP-UL January, 2023...

  • Page 2: Table Of Contents

    Original instruction Adoption of R410A Refrigerant This Air Conditioner is a new type which adopts a refrigerant R410A an environmentally friendly refrigerant. CONTENTS PRECAUTIONS FOR SAFETY ..................1. SPECIFICATIONS ....................... DIMENSIONAL DRAWING ..................WIRING DIAGRAMS ....................PARTS RATING ......................REFRIGERANT CYCLE DIAGRAM ................CONTROL OUTLINE ....................
  • Page 3 • The qualified service person is a person who installs, repairs, maintains, relocates and removes the air conditioners made by Toshiba Carrier Corporation. He or she has been trained to install, repair, maintain, relocate and remove the air conditioners made by Toshiba Carrier Corporation...
  • Page 4 Definition of Protective Gear When the air conditioner is to be transported, installed, maintained, repaired or removed, wear protective gloves and ‘safety’ work clothing. In addition to such normal protective gear, wear the protective gear described below when undertaking the special work detailed in the table below.
  • Page 5 Warning Indications on the Air Conditioner Unit [Confirmation of warning label on the main unit] Confirm that labels are indicated on the specified positions If removing the label during parts replace, stick it as the original. Warning indication Description WARNING WARNING ELECTRICAL SHOCK HAZARD ELECTRICAL SHOCK HAZARD...

  • Page 6: Precautions For Safety

    PRECAUTIONS FOR SAFETY The manufacturer shall not assume any liability for the damage caused by not observing the description of this manual. DANGER Before carrying out the installation, maintenance, repair or removal work, be sure to set the circuit breaker for both the indoor and outdoor units to the OFF position. Otherwise, electric shocks may result.
  • Page 7 WARNING Before starting to repair the air conditioner, read carefully through the Service Manual, and repair the air conditioner by following its instructions. Only qualified service person is allowed to repair the air conditioner. Repair of the air conditioner by unqualified person may give rise to a fire, electric shocks, injury, water leaks and / or other problems.
  • Page 8 Do not modify the products. Do not also disassemble or modify the parts. It may cause a fire, electric shock or injury. Prohibition of modification. When any of the electrical parts are to be replaced, ensure that the replacement parts satisfy the specifications given in the Service Manual (or use the parts contained on the parts list in the Service Manual).
  • Page 9 After repair work, surely assemble the disassembled parts, and connect and lead the removed wires as before. Perform the work so that the cabinet or panel does not catch the inner wires. If incorrect assembly or incorrect wire connection was done, a disaster such as a leak or fire is caused Assembly / at user’s side.
  • Page 10 When the service panel of the outdoor unit is to be opened in order for the compressor or the area around this part to be repaired immediately after the air conditioner has been shut down, set the circuit breaker to the OFF position, and then wait at least 10 minutes before opening the service panel. If you fail to heed this warning, you will run the risk of burning yourself because the compressor pipes and other parts will be very hot to the touch.
  • Page 11 • Refrigerant R410A This air conditioner adopts a type refrigerant R410A which does not deplete the ozone layer. 1. Safety Caution Concerned to R410A Refrigerant Accompanied with change of refrigerant, the refrigerating oil has been also changed. Therefore, be sure that water, dust, the former refrigerant or the former refrigerating oil is not mixed into the refrigerating cycle of the air conditioner with new refrigerant during installation work or service work.
  • Page 12 4. Tools (1) Required Tools for R410A Mixing of different types of oil may cause a trouble such as generation of sludge, clogging of capillary, etc. Accordingly, the tools to be used are classified into the following three types. 1) Tools exclusive for R410A 2) Tools exclusive for R410A, but can be also used for conventional refrigerant 3) Tools commonly used for R410A and for conventional refrigerant The table below shows the tools exclusive for R410A and their interchangeability.

  • Page 13: Specifications

    1. SPECIFICATIONS 4-way cassette type Model name MMU-UP0071HP-UL MMU-UP0091HP-UL MMU-UP0121HP-UL MMU-UP0151HP-UL MMU-UP0181HP-UL Cooling Capacity 12.0 15.4 18.0 (kBTU/h) Heating Capacity (kBTU/h) 10.5 13.5 17.0 20.0 1Ph. 208/230V ~ 60Hz. Power supply Electrical Running current 0.23 0.23 0.23 0.28 0.29 characteristics Power consumption 0.021 0.021...
  • Page 14 Model name MMU-UP0241HP-UL MMU-UP0301HP-UL MMU-UP0361HP-UL MMU-UP0421HP-UL MMU-UP0481HP-UL MMU-UP0541HP-UL Cooling Capacity 24.0 30.0 36.0 42.0 48.0 54.0 (kBTU/h) Heating Capacity 27.0 10.5 40.0 47.5 54.0 60.0 (kBTU/h) 1Ph. 208/230V ~ 60Hz. Power supply Electrical Running current 0.38 0.43 0.73 0.88 0.88 0.88 characteristics Power consumption...

  • Page 15: Dimensional Drawing

    2. DIMENSIONAL DRAWING MMU-UP0071HP-UL, MMU-UP0091HP-UL, MMU-UP0121HP-UL, MMU-UP0151HP-UL, MMU-UP0181HP-UL, MMU-UP0241HP-UL, MMU-UP0301HP-UL Unit : in (mm) 33.9"(860) to 35.8"(910) Ceiling open dimension 11.8"(300) or less Bottom face of ceiling Indoor unit Drain upstanding size 39.4"(1000) or more A (Liquid side) For UP007~UP018 : Ø1/4'' (6.4) Take-in port of wiring For UP024~UP030 : Ø3/8'' (9.5) An obstacle...
  • Page 16 MMU-UP0361HP-UL, MMU-UP0421HP-UL, MMU-UP0481HP-UL, MMU-UP0541HP-UL Unit : in (mm) 33.9"(860) to 35.8"(910) Ceiling open dimension 11.8"(300) or less Bottom face of ceiling Indoor unit Drain upstanding size 39.4"(1000) or more An obstacle 1.2" Take-in port of wiring Bottom face of ceiling (30) 39.4"(1000) or more...

  • Page 17: Wiring Diagrams

    3. WIRING DIAGRAM - 17 -...

  • Page 18: Parts Rating

    4. PARTS RATING MMU- Model UP030 UP007 UP009 UP012 UP015 UP018 UP024 ICF-340D60-1A Fan motor Motor for horizontal grille MSBPC20F04 PAM-MD12TF-301 Pulse motor valve 12.9" (328 mm) TA sensor Ø0.16"(4mm), 39.4" (1000mm) TC1 sensor Ø0.24"(6mm), 39.4" (1000mm) TC2 sensor Ø0.24"(6mm), 39.4" (1000mm) TCJ sensor Float switch FS-1A-31-3...

  • Page 19: Refrigerant Cycle Diagram

    5. REFRIGERATING CYCLE DIAGRAM Liquid side Gas side Strainer Capillary tube Air heat exchanger at indoor side Pulse Motor Valve (PMV) Distributor Sensor (TCJ) Sensor (TC2) Sensor (TC1) Sensor Fan motor (TA) Functional part name Functional outline Pulse Motor Valve (Connector CN082 (6P): Blue) 1) Controls super heat in cooling operation 2) Controls under cool in heating operation...

  • Page 20: Control Outline

    6. CONTROL OUTLINE 6-1. Control Specifications Item Outline of specifications Remarks When power 1) Distinction of outdoor unit supply is reset When the power supply is reset, the outdoors are distinguished and the control is selected according to the distinguished result. 2) Setting of indoor fan speed and existence of air direction adjustment Based on EEPROM data, select setting of the indoor fan...
  • Page 21 Item Outline of specifications Remarks Room temp. 2) Using the CODE N . 06, the setup temperature in heating Shift of suction control operation can be corrected. temperature in heating (Continued) operation Setup data Setup temp. correction +0°C +2°C +4°C +6°C Except while sensor of (+3.6°F)
  • Page 22 Item Outline of specifications Remarks Air speed 1) Operation with (HH), (H), (L) or [AUTO] mode is carried HH > H+ > H > L+ > L > UL selection out by the command from the remote controller. 2) When the air speed mode [AUTO] is selected, the air speed varies by the difference between Ta and Ts.
  • Page 23 Item Outline of specifications Remarks Air speed selection Selection of high ceiling type CODE No. : (Continued): [5d] or selection of high ceiling on P .C. board SW501 Standard Type 1 Type 3 CODE No. [5d] 0000 0001 0003 SW501 (1)/(2) OFF/OFF ON/OFF OFF/ON...
  • Page 24 Item Outline of specifications Remarks Freeze prevention 1. In all cooling operation, the air conditioner operates TC1: Temperature of indoor control (Low temp. as described below based upon temp. detected by heat exchanger sensor release) TC1, TC2 and TCJ sensors. When “J”...
  • Page 25 Item Outline of specifications Remarks Recovery control The indoor unit which is under STOP/Thermo-OFF • The indoor unit which is for heating status or which operates in [FAN] mode performs the under thermo-OFF (COOL) refrigerant (Oil) following controls when it received the heating status or which operates in refrigerant (Oil) recovery signal from the outdoor unit.
  • Page 26 Item Outline of specifications Remarks < READY> Displayed on the remote controller • < READY> display Display of [READY] 1) When the following check codes are indicated No display for wireless [HEAT READY] type remote controller • Open phase of power supply wiring [P05] was detected. •...
  • Page 27 Item Outline of specifications Remarks Louver control: 1) Louver position setup The louver position at horizontal discharge • When the louver position is changed, the position moves position at under AP030 necessarily to downward discharge position once to return to differs from that at over the set position.
  • Page 28 Item Outline of specifications Remarks Louver control <<Selection of Swing mode>> (Continued): • For the Swing mode, the following three types of modes are selectable and settable by keeping Swing/Direction on the remote controller. 1) Standard (4 pieces: same phase) swing →...
  • Page 29 Item Outline of specifications Remarks Louver control • If there is the locked louver in the unit, [ ] goes on the For the setting operation, refer to [How to set louver remote controller screen. (Continued): lock] of Installation Manual. •...
  • Page 30 Item Outline of specifications Remarks Secondary Secondary heating can be used while heating operations are performed. heating <Control Outline (Normal Mode)> 1) If the difference between the indoor temperature and the outdoor temperature is large while the air conditioner is operating, turn ON the secondary heating.
  • Page 31 Item Outline of specifications Remarks Secondary DN [C5] Data Secondary heating mode heating 0000 Normal mode (Factory default) (Continued) 0001 Flip mode : Set temp. out (high) [ºF(ºC)] DN [C6] Data "-0015": 5ºF(-15ºC) to "0015": 59ºF(15ºC) -0015 "0000": 32ºF(0ºC) (Factory default) 0015 [ºF(ºC)] DN [C7]...

  • Page 32: Communication Type, Model Names And The Maximum Number Of Connectable Units

    7. COMMUNICATION TYPE, MODEL NAMES AND THE MAXIMUM NUMBER OF CONNECTABLE UNITS 7-1. This air conditioning (U series) has new communication specifications, and TU2C- Link (U series) and TCC-Link (other than U series) differ in a communication type. For the communication type and the model names such as each unit or remote controllers, refer to the following table.

  • Page 33: Configuraion Of Control Circuit

    8. CONFIGURATION OF CONTROL CIRCUIT 8-1. Indoor controller block diagram (MCC-1643) 8-1-1. In case of connection of wired remote controller Wired remote controller (Up to 2 units) Schedule timer Display LCD Function setup Display driver Key switch Display LED Function setup DC5V Power circuit...

  • Page 34: In Case Of Connection Of Wireless Remote Controller

    8-1-2. In case of connection of wireless remote controller Indoor unit #1 (Header) Wireless remote (Follower) (Follower) controller kit Receiving Indoor control P.C. board P.C. board (MCC-1643) DC20V Remote controller Remote controller communication circuit communication circuit Emergent Power operation circuit EEPROM DC5V DC5V...

  • Page 35: Connection Of Both Wired Remote Controller And Wireless Remote Controller

    8-1-3. Connection of both wired remote controller and wireless remote controller Wired header remote controller Schedule timer Function setup Display LCD Display driver Key switch EEPROM Function setup DC5V DC5V Power Display LED Key switch circuit Power Remote controller Secondary circuit communication circuit battery...

  • Page 36: Indoor Print Circuit Board

    8-2. Indoor Print Circuit Board 8-2-1. MCC-1643 - 36 -...

  • Page 37: Optional Connector Specifications Of Indoor P.c.board

    8-3. Optional Connector Specifications of Indoor P.C. Board Connector Function Specifications Remarks Secondary heating Secondary Heating Output (DN [191] = 01) CN32 DC12V � output / Ventilation Secondary heating can be used while heating output operation are performed. Output � Ventilation Output (DN [191] = 00) Single operation by FAN button on remote controller is set up from remote controller (DN = 31)

  • Page 38: Functions At Test Run

    8-4. Functions at test run � Cooling/Heating test run check The test run for cooling/heating can be performed from either indoor remote controller or outdoor interface P .C. board. 1. Start/Finish operation of test run � Test run from indoor remote controller Wired remote controller: Refer to the below item of “Test run”...
  • Page 39 <RBC-AWSU52-UL> In the “Field setting menu” screen, press ] and [ ] to select “Test mode”, and then press [ Set/Fix]  Test mode is set, and returns to the “Field setting menu” screen. Press the [ Return] button 2 times, to open screen (2).
  • Page 40  In case of wireless remote controller 1. When TEMPORARY button is pushed for 10 seconds or more, “Pi!” sound is heard and the operation changes to a forced cooling operation. After approx. 3 minutes, a cooling operation starts forcedly. Check cool air starts blowing.
  • Page 41 � Check function for operation of indoor unit (Functions at indoor unit side) This function is provided to check the operation of the indoor unit singly without communication with the remote controller or the outdoor unit. This function can be used regardless of operation or stop of the system. However, if using this function for a long time, a trouble of the equipment may be caused.

  • Page 42: Applied Control

    9. APPLIED CONTROL 9-1. Setup of Selecting Function in Indoor Unit (Be Sure to Execute Setup by a Wired Remote Controller) <RBC-AMT***> Push the buttons simultaneously and hold for at CODE No. least 4 seconds. SET DATA 00 01 SETTING TEST UNIT No.
  • Page 43 <RBC-AWSU52-UL> Press [ Menu] to open the “Menu” Press and hold [ Menu] and [ ] at the same time to open “Field setting menu”  Press and hold 4 seconds. In the “Field setting menu” screen, press ] and [ ] to select “DN setting”, and then press [ Set/Fix]...
  • Page 44 Indoor unit function Code No. (DN Code) table (includes functions needed to perform applied control on site) Description Item At shipment Filter display delay timer 0000: None 0001: 150H Depending on model 0002: 2500H 0003: 5000H type 0004: 10000H t l i f 0001: High degree of dirt (Half of standard time) Central control address 0001: No.1 unit...
  • Page 45 Description Item At shipment ° : F ° 0001: °F Refer to page 23, item No.6 c i t Depending on model type High-ceiling adjustment (Air flow selection) Timer setting 0000: Available 0001: Unavailable 0000: Available (wired remote controller) (can be performed) (cannot be performed) Dual set point 0000: Unavailable...
  • Page 46 Item Description At shipment Notice code 0000: None 0000: None number 01 0001 ~ 0255 : Notice code 0129 : Notice code (201) Notice code 0000: None 0130 : Notice code (202) number 02 (0001 ~ 0255 : TU2C-LINK only) Notice code 0000: None number 03...
  • Page 47 TYPE CODE No. [10] Setup data Type Abbreviated Model name *1 0001 4-way Cassette MMU-UP XXX HP-UL *1: Initial setting value of EEPROM installed on the service P .C. board Indoor unit capacity CODE No. [11] Setup data Model Setup data Model 0001 0013...

  • Page 48: Applied Control In Indoor Unit

    9-2. Applied Control in Indoor Unit � Remote location ON/OFF control box (TCB-IFCB-4UL) [Wiring and setup] • Use the exclusive connector for connection with the indoor control P.C. board. • In a group control, the system can operate when connecting with any indoor unit (Control P.C. board) in the group.
  • Page 49 Ventilating fan control from remote controller [Function] • The start / stop operation can be operated from the wired remote controller when air to air heat exchanger or ventilating fan is installed in the system. • The fan can be operated even if the indoor unit is not operating. •...
  • Page 50 <RBC-AWSU52-UL> Press [ Menu] to open the “Menu” Press and hold [ Menu] and [ ] at the same time to open “Field setting menu” Press and hold 4 seconds. In the “Field setting menu” screen, press [ ] and [ ] to select “DN setting”, and then press [ Set/Fix] Press [...
  • Page 51 Auto-off feature control [Function] • This function controls the indoor units individually. It is used when the start operation from outside is unnecessary but the stop operation is necessary. • A card switch box or card lock helps protect customers from forgetting to turn off the indoor unit. (not including the following Card Input 3) •...
  • Page 52 [Control items] External contact terminal Function Close (Status that card is inserted) Open (Status that card is taken out) Manual prohibition release Manual prohibition Card Input 1 (Manual operation) (Operation stop) Manual prohibition release Manual prohibition Card Input 2 (Automatic operation) (Operation stop) Operation status continues Operation status continues and setting temperature...
  • Page 53 [The example of Card Input 5 setting] Code No. (DN) setting External contact terminal Case. [16A] [16b] [16C] [16d] [16F] [170] [171] [172] [173] Close (Status that card is inserted) Open (Status that card is taken n out) data data data data data...
  • Page 54 Notice code signal Notice code is a function dedicated to TU2C-Link communication. See service manual for u series outdoor unit for details of Notice code. [Function] • Notice Code is issued if there is signal input to connector of outdoor unit P.C. board. This can be used in cases such as when confirming state of outdoor unit (filter clogging, etc.) by air conditioner system.
  • Page 55 Manual address setting using the remote controller Procedure when setting indoor units’ addresses first under the condition that indoor wiring has been completed and outdoor wiring has not been started (manual setting using the remote controller) Wiring example of 2 refrigerant lines Refrigerant line 1 Refrigerant line 2 Outdoor...
  • Page 56 <Indoor unit address> 13 13 13 13 13 Push the TEMP. buttons repeatedly to set the CODE No. to Push the TIME buttons repeatedly to set an indoor unit address. Push the button. (It is OK if the display turns on.) <Group address>...
  • Page 57 <Indoor unit address> ] to set the item code No. to 13. ] to black highlight the item code (DN), and then press [ ] and [ Press [ ] to set the data indoor unit address. Press [ ] to black highlight the data, and then press [ ] and [ After finishing setting the data of the item code (DN), press [ Set/Fix]...
  • Page 58 To find an indoor unit’s position from its address Procedure to know the position of indoor unit body by address while indoor unit No. is known. • Confirm each indoor unit address while indoor unit is stopped. (Be sure to stop air conditioner.) <RBC-AMT >...
  • Page 59 <RBC-AWSU52-UL> [Procedure] The position of indoor unit body by address Push the [ MENU] button to display the menu screen. Push and hold the [ MENU] button and the [ ] button at the same time to display the “Field setting menu”. →...
  • Page 60 Check code clearing function How to clear the check code using the wired remote controller <RBC-AMT > Clearing a check code of the outdoor unit Clear the currently detected outdoor unit for each refrigerant line to which the indoor unit controlled by the remote controller is connected.
  • Page 61 <RBC-AW5U52-UL> Displays the last 10 check codes, and at which unit and when they occurred. In the “Field setting menu” screen, press ] and [ ] to select “Alarm history”, and then press [ Set/Fix] NOTE • The check code history data shows a history of 10 occurrences. If the occurrences exceed 10, the oldest data is deleted. •...
  • Page 62 Monitoring function of wired remote controller <RBC-AMT > TEMP. ON / OFF TIMER SET MODE TIME SAVE VENT FILTER RESET TEST SWING/FIX UNIT LOUVER Content Enter the service monitoring mode using the remote controller to check the sensor temperature or operation status of the remote controller, indoor unit, and outdoor unit.
  • Page 63 <RBC-AWSU52-UL> Displays the codes and data indicating the operating condition and temperature of each sensor on the indoor units, outdoor units, and remote controllers. In the “Field setting menu screen, press ” ] and [ ] to select “Monitor function ”...

  • Page 64: Troubleshooting

    10. TROUBLESHOOTING 10-1. Overview (1) Before engaging in troubleshooting (a) Applicable models All Super Modular Multi System (SMMS- ) models. (Indoor units: MM -UP , Outdoor units: MMY-M P (b) Tools and measuring devices required • Screwdrivers (Philips, flat head), spanners, long-nose pliers, nipper, pin to push reset switch, etc. •...

  • Page 65: Troubleshooting Method

    10-2. Troubleshooting method The remote controllers (main remote controller and central control device) and the interface P.C. board of an outdoor unit are provided with an a 7-segment display (outdoor interface P.C. board) to display operational status. Using this self-diagnosis feature, the trouble site / trouble part may be identified in the event of a trouble by following the method described below.
  • Page 66 (Check code detected by remote controller) Check code Display of receiving unit Outdoor 7-segment display Indicator light block Typical trouble site Description of trouble Remote control Operation Timer Ready Sub-code Flash No master remote control, Signals cannot be received from indoor unit; –...
  • Page 67 List of Check Codes (Outdoor Unit) (Check code detected by outdoor interface - typical examples) If "HELLO" is displayed on the oudoor 7-segment for 1 minute or more, turn off the power supply once and then turn on the power supply again after passage of 30 seconds or more. When the same symptom appears, it is considered there is a possibility of I/F board trouble.
  • Page 68 Check code Display of receiving unit Outdoor 7-segment display Central Indicator light block control or main Typical problem site Description of problem remote Operation Timer Ready Sub-code Flash controller display Outdoor suction 01: TS1 sensor Outdoor suction temperature sensor temperature sensor 03: TS3 sensor (TS1,TS3) has been open/short-circuited.
  • Page 69 Check code Display of receiving unit Outdoor 7-segment display Central Indicator light block Typical problem site Description of problem control or main remote Operation Timer Ready Sub-code Flash controller display P.C.board P.C.board Compressor Fan Motor Compressor Fan Motor Trouble in number of There are insufficient number of P.C.
  • Page 70 (Check code detected by Inverter of Compressor featuring in outdoor unit - typical examples) Check code Display of receiving unit Outdoor 7-segment display Central Indicator light block Typical problem site Description of proplem control or main remote Operation Timer Ready Sub-code controller Flash...

  • Page 71: Troubleshooting By Check Display On Remote Controller

    10-3. Troubleshooting by check Display on Remote Controller <RBC-AMT > (1) Checking and testing When a trouble occurs to an air conditioner, a check code and indoor unit No. are displayed on the display window of the remote controller. Check codes are only displayed while the air conditioner is in operation.
  • Page 72 <RBC-AWSU52-UL> Check code When an error occurs in the air conditioner, the check Indoor unit number code and the indoor unit number flash on the display of the remote controller. * The check code is only displayed during the operation. When the check code and indoor unit number are displayed, pressing [ Return] opens the “Check”...
  • Page 73 Using indoor unit indicators (receiving unit light block) (wireless type) To identify the check code, check the 7-segment display on the header unit. To check for check codes not displayed on the 7-segment display, consult the “List of Check Codes (Indoor Unit)” in “10-2. Troubleshooting method”. : Blinking (0.5 seconds) : Lighting : Goes off...
  • Page 74 Cause of trouble Light block Check code Heat exchanger temperature sensor (TCJ) trouble Operation Timer Ready Heat exchanger temperature sensor (TC2) trouble Indoor unit temperature Heat exchanger temperature sensor (TC1) trouble sensor trouble Ambient temperature sensor (TA) trouble Alternate blinking Discharge temperature sensor (TF) trouble Discharge temperature sensor (TD1) trouble Discharge Operation Timer...
  • Page 75 Cause of trouble Light block Check code Operation Timer Ready Occupancy sensor trouble Outdoor EEPROM trouble Synchronized blinking Other (indications not involving check code) Cause of trouble Light block Check code Operation Timer Ready – Test run in progress Synchronized blinking Operation Timer Ready Setting incompatibility...

  • Page 76: Check Codes Displayed On Remote Controller And Smms Series Outdoor Unit (7-Segment Display On I/F Board) And Locations To Be Checked

    10-4. Check Codes Displayed on Remote Controller and SMMS series Outdoor Unit (7-Segment Display on I/F Board) and Locations to Be Checked For other types of outdoor units, refer to their own service manuals. Check code Location Check code detection Main Outdoor 7-segment display Description...
  • Page 77 Check code Location Check code detection Main Outdoor 7-segment display Description System status Check items (locations) condition(s) remote Check detection Sub-code controller code No. of indoor Indoor unit Indoor-outdoor All stop Condition 1 • Check power supply to units from communication One indoor unit or more indoor unit.
  • Page 78 Check code Location Check code detection Main Outdoor 7-segment display Description System status Check items (locations) condition(s) remote Check detection Sub-code controller code Too many All stop • Combined capacity of • Check capacities of indoor Capacity over indoor units indoor units is too large.
  • Page 79 Check code Location Check code detection Main Outdoor 7-segment display Description System status Check items (locations) condition(s) remote Check detection Sub-code controller code Detected Outdoor All stop Outdoor header unit • Check check code outdoor unit No. follower unit receives trouble code from displayed on outdoor trouble outdoor follower unit.
  • Page 80 Check code Location Check code detection Main Outdoor 7-segment display Description System status Check items (locations) condition(s) remote Check detection Sub-code controller code TD2 sensor All stop Sensor resistance is infinity • Check connection of TD2 trouble or zero (open/short circuit). sensor connector.
  • Page 81 Check code Location Check code detection Main Outdoor 7-segment display Description System status Check items (locations) condition(s) remote Check detection Sub-code controller code Outdoor All stop Readings of high-pressure • Check connection of high- pressure Pd sensor and low-pressure pressure Pd sensor sensor wiring Ps sensor are switched.
  • Page 82 Check code Location Check code detection Main Outdoor 7-segment display Description System status Check items (locations) condition(s) remote Check detection Sub-code controller code TD1 sensor All stop Discharge temperature of • Check installation of TD1 miswiring compressor 1 (TD1) does sensor.
  • Page 83 Check code Location Check code detection Main Outdoor 7-segment display Description System status Check items (locations) condition(s) remote Check detection Sub-code controller code 01: TK1 oil Oil level All stop No temperature change is • Check for disconnection of circuit trouble detection detected by TK1 despite TK1 sensor.
  • Page 84 Check code Location Check code detection Main Outdoor 7-segment display Description System status Check items (locations) condition(s) remote Check detection Sub-code controller code Outdoor All stop Initial setting of I/F P.C. • Check model setting of — capacity not set board has not been P.C.
  • Page 85 Check code Location Check code detection Main Outdoor 7-segment display Description System status Check items (locations) condition(s) remote Check detection Sub-code controller code 1∗: Compressor Activation of All stop High-pressure SW is • Check connection of high- 1 side high-pressure activated.
  • Page 86 Check code Location Check code detection Main Outdoor 7-segment display Description System status Check items (locations) condition(s) remote Check detection Sub-code controller code Detected indoor Indoor unit Indoor overflow All stop • Float switch operates. • Check float switch address trouble •...
  • Page 87 Check code Location Check code detection Main Outdoor 7-segment display Description System status Check items (locations) condition(s) remote Check detection Sub-code controller code Discharge All stop Discharge temperature • Check outdoor service temperature (TD2) exceeds 115 ˚C. valves (gas side, liquid TD2 trouble side) to confirm full opening.
  • Page 88 Check code Location Check code detection Main Outdoor 7-segment display Description System status Check items (locations) condition(s) remote Check detection Sub-code controller code 1∗: Fan P.C. Fan INV. Outdoor fan All stop Protected operation of Fan • Check fan motor. board 1 P.C.
  • Page 89 Check codes Displayed on by Central Control Device Check code Location Check code detection Main Outdoor 7-segment display Description System status Check items (locations) condition(s) remote Check detection Sub-code controller code Indoor unit Indoor-remote Stop of There is no communication •...
  • Page 90 Points to Note When Servicing Compressor (1) When checking the outputs of inverters, remove the wiring from all the compressors. How to Check Inverter Output (1) Turn off the power supply. (2) Remove compressor leads from the compressor P.C. board. (The model with two compressor should remove the wiring for two sets (6 leads).

  • Page 91: Diagnostic Procedure For Each Check Code (Indoor Unit)

    10-5. Diagnostic Procedure for Each Check Code (Indoor Unit) - 91 -...
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  • Page 99: Sensor Characteristics

    10-6. Sensor Characteristics Indoor Unit Temperature sensor characteristics Indoor TA sensor Temperature [˚F(˚C)] Resistance [kΩ] 32˚F(0˚C) 33.9 Resistance 41˚F(5˚C) 26.1 [kΩ] 50˚F(10˚C) 20.3 59˚F(15˚C) 15.9 68˚F(20˚C) 12.6 77˚F(25˚C) 10.0 86˚F(30˚C) 95˚F(35˚C) 104˚F(40˚C) 113˚F(45˚C) 122˚F(50˚C) 131˚F(55˚C) 140˚F(60˚C) 32˚F 50˚F 68˚F 86˚F 104˚F 122˚F 140˚F...

  • Page 100: Replacement Of Service P.c.board

    11. REPLACEMENT OF SERVICE P.C. BOARD Indoor Unit CAUTION <Note: when replacing the P.C. board for indoor unit servicing> The nonvolatile memory (hereafter called EEPROM, IC503) on the indoor unit P.C. board before replacement includes the model specific type information and capacity codes as the factory-set value and the important setting data which have been automatically or manually set when the indoor unit is installed, such as system/ indoor/group addresses, high ceiling select setting, etc.
  • Page 101 [1] Setting data read out from EEPROM (Stop the operation of the unit.) <RBC-AMT > [1] Setting data read out from EEPROM The setting data modified on the site, other than factory-set value, stored in the EEPROM shall be read out. Step 1 Push button on the remote controller simultaneously for more than 4 seconds.
  • Page 102 <RBC-AWSU52-UL> Push the [ MENU] button to display the menu screen. Push and hold the [ MENU] button and the ] button at the same time to display the “Field setting menu”. • Push and hold the buttons for more than 4 seconds. Push the [ ] / [ ] button to select...
  • Page 103 CODE No. required at least 1. The CODE No. for the Indoor unit type and Indoor unit capacity are Contents required to set the rotation number setting of the fan. 0010 Type 2. If the system/indoor/group addresses are different from those 0011 Indoor unit capacity before replacement, the auto-address setting mode starts and the...
  • Page 104 [3] Writing the setting data to EEPROM (Stop the operation of the unit.) <RBC-AMT > Step 1 Push buttons on the remote controller simultaneously for more than 4 seconds. * In the group control operation, the unit No. displayed for the first time is the header unit No.. At this time, the CODE No.
  • Page 105 <RBC-AWSU52-UL> Push the [ Menu] button to display the menu screen. Push and hold the [ Menu] button and the [ ] button at the same time to display the “Field setting menu”. • Push and hold the buttons for more than 4 seconds. ] / [ Push the [ ] button to select “7.
  • Page 106 Change “Code (DN)” to [0002] with the [ ] / [ ] button. (Filter pollution level) Perform the operation of . Check the other “Code (DN)” also, change “Data” into the setting data written down in [1] Setting data read out from EEPROM if the setting data is different. Return] button.
  • Page 107 Table 1.Setting data(CODE No. table(example)) Item Setting data Factory-set value Filter display delay timer 0002 : 2500H Dirty state of filter 0000 : Standard Central control address 00Un/0099 : Unfixed Specific indoor unit priority 0000 : No priority +3.6°F( Heating suction temperature shift Automatic mode 0001 : No automatic Cooling only...

  • Page 108: Detachments

    12. DETACHMENTS Part name Procedure Remarks Suction grille XCAUTIONX Suction grille Knobs of the suction grille hook Be sure to put on the gloves and long-sleeved shirt at disassembling work; otherwise an injury will be caused by a part, etc. 1.
  • Page 109 Part name Procedure Remarks Electric parts cover (Continued) 1. Detachment Adjust corner cap Adjust corner cap 1) Pull knob of the adjust corner cap to the arrow direction, remove strap of the adjust corner cap from pin of the panel and then remove all the 4 corners of the cap.
  • Page 110 Part name Procedure Remarks 1. Detachment Ceiling panel Clamp 1) Carry out works of item 1 of 2 and item 1 of 3 . 2) Remove the flap connector Louver motor wiring Louver motor wiring (CN510, White, 20P) connected to the control P .C.
  • Page 111 Part name Procedure Remarks 1. Detachment Control P.C. board 1) Carry out work of item 1 of 2 . 2) Remove connectors which are connected from the control P.C. board to the other parts and then remove wiring from the clamp. CN510 : Louver motor (20P, White) CN34 : Float switch (3P, Red) CN504 : Drain pump (2P, White)
  • Page 112 Part name Procedure Remarks 1. Detachment Drain cap Drain cap (outside) 1) Carry out work of item 1 of 1 . 2) Loosen screws (3 positions) fixing the drain cap (outside) and then turn the drain cap to the arrow mark direction to remove it. CLOSE CLOSE NOTE :...
  • Page 113 Part name Procedure Remarks 1. Detachment Fan motor Fixing screw A 1) Carry out work of item 1 of 2 . 2) Remove connectors which are connected from the control P.C.board to the other parts and then remove each wiring from the clamp. CN510 : Louver motor (20P,White) CN34 : Float switch (3P, Red) CN504 : Drain pump (2P,White)
  • Page 114 Part name Procedure Remarks 2. Attachment Fan motor (Continued) M6 nut 2) Fix the fan motor lead, TC sensor and TCJ sensor with the clamp of the bell mouth. 3) Mount the electric parts box with the fixing screws A and B. (Ø4 ×...
  • Page 115 Part name Procedure Remarks 1. Detachment Drain pump Fixing screw A 1) Carry out works of item 1 of 2 and item 1 of 6 . 2) Remove the drain pump connector (CN504, Drain port Drain port White, 2P) connected to the control P .C. board and then remove the lead wire from the clamp.
  • Page 116 Part name Procedure Remarks 1. Detachment Float switch assembly 1) Carry out works of item 1 of 7 and works from 1) to 5). Float switch assembly Float switch assembly 2) Remove the fixing screw and then remove the float switch assembly. (Ø4 × 25, 1 pc.) 2.
  • Page 117 Part name Procedure Remarks 1. Detachment Heat exchanger 1) Recover the refrigerant gas. 2) Carry out work of item 1 of 10 . 3) Remove refrigerant pipe at indoor unit side. 4) Remove the fixing screws and then remove the piping cover. (Ø4 ×10, 3 pcs.) 5) Remove the drain hose from the drain pump and remove the fixing screws to remove the drain pump stand.

  • Page 118: Exploded Views And Parts List

    13. EXPLODED VIEWS AND PARTS LIST 13-1. Indoor Unit MMU-UP0071HP-UL, MMU-UP0091HP-UL - 118 -...
  • Page 119 Model name MMU-UP****HP-UL Location Part No. Description 0071 0091 43T20335 FAN,ASSY TURB 43T97001 43T39353 CAP,NUT 43T77301 PUMP ASSY 43T51314 SWITCH ASSY FLOAT 43T44705 REFRIGERATION CYCLE ASSY 43T72361 PAN ASSY, DRAIN 43T79317 LID ASSY, INSIDE 43T79319 LID ASSY, OUTSIDE 43T83312 STRING 43T22322 BELL MOUTH 43T19357...
  • Page 120 MMU-UP0121HP-UL, MMU-UP0151HP-UL, MMU-UP0181HP-UL, MMU-UP0241HP-UL, MMU-UP0301HP-UL - 120 -...
  • Page 121 Model name MMU-UP****HP-UL Location Part No. Description 0121 0151 0181 0241 0301 43T20335 FAN,ASSY TURB 43T97001 43T39353 CAP,NUT 43T77301 PUMP ASSY 43T51314 SWITCH ASSY FLOAT 43T44706 REFRIGERATION CYCLE ASSY 43T44707 REFRIGERATION CYCLE ASSY 43T72362 PAN ASSY, DRAIN 43T79317 LID ASSY, INSIDE 43T79319 LID ASSY, OUTSIDE 43T83312...
  • Page 122 MMU-UP0361HP-UL, MMU-UP0421HP-UL, MMU-UP0481HP-UL, MMU-UP0541HP-UL - 122 -...
  • Page 123 Model name MMU-UP****HP-UL Location Part No. Description 0361 0421 0481 0541 43T20334 FAN,ASSY TURB 43T97001 43T39353 CAP,NUT 43T77301 PUMP ASSY 43T51314 SWITCH ASSY FLOAT 43T44708 REFRIGERATION CYCLE ASSY 43T72363 PAN ASSY, DRAIN 43T79317 LID ASSY, INSIDE 43T79319 LID ASSY, OUTSIDE 43T83312 STRING 43T22322...
  • Page 124 13-2. Electric parts Model name MMU-UP****HP-UL Location Part No. Description 0071 0091 0121 0151 0181 0241 0301 0361 0421 0481 0541 43T50411 TC-SENSOR 43T50387 TC-SENSOR (TC2) 43T50386 TCJ SENSOR (RED) 43T60362 TERMINAL 43T60435 SERV-TERMINAL 43TN9874 PC BOARD ASSY(MCC-1643) 43T60547 ASM-HOUSING(PW) 43T60543 ASM-HOUSING(BUS) 43T60544...
  • Page 125 RBC-U32PGP-UL Location Part No. Description RBC-U32PGP-UL 43T09533 GRILLE AINL 43T80350 AIR FILTER 43T21434 STEPPING-MOTOR 43T07317 AIR OUTLET FOAM (A) 43T07318 AIR OUTLET FOAM (B) 43T09531 LOUVER 43T01317 PANEL-COVER-ASSEMBLY 43T01332 ASM-COVER-PANEL 43T07320 PANEL FIX PLATE (A) 43T07321 PANEL FIX PLATE (B) 43T07324 HOOK 43T07319...
  • Page 126 WARNINGS ON REFRIGERANT LEAKAGE Check of Concentration Limit NOTE 2 The standards for minimum room volume are as The room in which the air conditioner is to be follows. installed requires a design that in the event of (1) ) No partition (shaded port refrigerant gas leaking out, its concentration will not exceed a set limit.
  • Page 127 144/9 MOO 5, BANGKADI INDUSTRIAL PARK, TIVANON ROAD, TAMBOL BANGKADI, AMPHUR MUANG, PATHUMTHANI 12000, THAILAND.

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Toshiba mmu-up0091hp-ulToshiba mmu-up0121hp-ulToshiba mmu-up0151hp-ulToshiba mmu-up0181hp-ulToshiba mmu-up0241hp-ulToshiba mmu-up0301hp-ul ... Show all

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