Toshiba MMU-UP0071MHP-UL Service Manual
  1. Manuals
  2. Brands
  3. Toshiba Manuals
  4. Air Conditioner
  5. MMU-UP0071MHP-UL
  6. Service manual
Toshiba MMU-UP0071MHP-UL Service Manual

Toshiba MMU-UP0071MHP-UL Service Manual

Multi type, indoor unit, compact 4-way cassette type
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
AIR CONDITIONER (MULTI TYPE)
SERVICE MANUAL
Indoor unit
<Compact 4-way cassette type>
MMU-UP0071MHP-UL
MMU-UP0091MHP-UL
MMU-UP0121MHP-UL
MMU-UP0151MHP-UL
MMU-UP0181MHP-UL
FILE NO. SVM-24023
June, 2024

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the MMU-UP0071MHP-UL and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Toshiba MMU-UP0071MHP-UL

Summary of Contents for Toshiba MMU-UP0071MHP-UL

  • Page 1 FILE NO. SVM-24023 AIR CONDITIONER (MULTI TYPE) SERVICE MANUAL Indoor unit <Compact 4-way cassette type> MMU-UP0071MHP-UL MMU-UP0091MHP-UL MMU-UP0121MHP-UL MMU-UP0151MHP-UL MMU-UP0181MHP-UL June, 2024...

  • Page 2: Table Of Contents

    CONTENTS PRECAUTIONS FOR SAFETY................... 1. SPECIFICATIONS....................2. CONSTRUCTION VIEWS (EXTERNAL VIEWS) ............ 3. WIRING DIAGRAMS....................4. PARTS RATING ...................... 5. REFRIGERANT CYCLE DIAGRAM ............... 6. CONTROL OUTLINE ....................7. COMMUNICATION TYPE, MODEL NAMES AND THE MAXIMUM NUMBER OF CONNECTABLE UNITS ..................8.

  • Page 3: Original Instruction

    Original instruction Please read carefully through these instructions that contain important information which complies with the “Machinery Directive” (Directive 2006/42/EC), and ensure that you understand them. Definition of Qualified Installer or Qualified Service Person The air conditioner must be installed, maintained, repaired and removed by a qualified installer or qualified service person.
  • 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

    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 WARNING ELECTRICAL SHOCK HAZARD ELECTRICAL SHOCK HAZARD Disconnect all remote Disconnect all remote electric power supplies before servicing.

  • 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 WARNIG 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 (*1) 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.

  • Page 11: Cautions On Installation/Service

    • 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 Indoor unit : Compact 4-way cassette type MMU-UP0071MHP-UL MMU-UP0091MHP-UL Model name MMU-UP0121MHP-UL Cooling Capacity (*1) (kBTU/h) 12.0 10.5 Heating Capacity (*1) (kBTU/h) 13.5 Power supply 1Ph. 208/230V ~ 60Hz. Running current 0.29/0.26 0.30/0.27 0.31/0.28 Electrical characteristics Power consumption (Kw) 0.23/0.23...
  • Page 14 Model name MMU-UP0151MHP-UL MMU-UP0181MHP-UL Cooling Capacity (*1) (kBTU/h) 15.4 18.0 Heating Capacity (*1) (kBTU/h) 17.0 20.0 Power supply 1Ph. 208/230V ~ 60Hz. Running current 0.36/0.33 0.45/0.41 Electrical characteristics Power consumption (Kw) 0.31/0.31 0.41/0.41 Starting current 0.43/0.39 0.54/0.49 Main unit Zinc hot dipping steel plate Appearance Model name RBC-UM21P-UL / RBC-UM21PB-UL...

  • Page 15: Construction Views (External Views)

    2. CONSTRUCTION VIEWS (EXTERNAL VIEWS) Compact 4-way cassette type Unit: in (mm) 11.8" (300 mm) or less Indoor unit Underside of ceiling 0.5" (13) to 0.5" (13) to 0.8" (20) Ceiling open dimension 22.8" (580) to 23.4" (594) 0.8" (20) Panel external dimension 24.4"...

  • Page 16: Wiring Diagrams

    3. WIRING DIAGRAMS Compact 4-way cassette type - 16 -...

  • Page 17: Parts Rating

    4. PARTS RATING Indoor unit Compact 4-way cassette type Model MMU-UP****MHP-UL LDF-340-60AA1 Fan motor PMD-08D12TF-2 Drain pump motor FS-1A-31-3 Float switch PAM-B25YGTF-2 PAM-B40YGTF-1 Pulse motor valve MCC-1643 P.C.board Lead wire length : 32.2''(818 mm) TA sensor Dia. 0.16" (4 mm) : size lead wire length: 19.69"(500 mm) Vinyl tube TC1 sensor Dia.

  • Page 18: Refrigerant Cycle Diagram

    5. REFRIGERANT CYCLE DIAGRAM Indoor unit 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 19: Control Outline

    6. CONTROL OUTLINE 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 20 Item Outline of specifications Remarks 2) By setting the CODE No. 06, the setup temperature in Return air temperature Room temp. control heating operation can be compensated. shift of heating operation (Continued) Setup data Except while sensor of Setup temp. correction +0°C +2°C +4°C...
  • Page 21 Item Outline of specifications Remarks Fan speed 1) By the command from remote control, fan speed is HH > H+ > H > L+ > L > UL selection changed. ((HH), (H+), (H), (L+), (L) or [AUTO]) 2) When the fan speed mode [AUTO] is selected, the fan Depends on fan speed mode speed varies by the difference between TA and Ts.
  • Page 22 Item Outline of specifications Remarks Fan speed selection Setting of height ceiling mode at CODE No. [5D] or (Continued): at SW501 on P .C. board. Compact 4-way (only UP015, 018) (Fan speed selection of UP012 or less for Compact 4-way are only Standard.) Factory default Type 1 Type 3...
  • Page 23 Item Outline of specifications Remarks 1. In heating operation, the lowest temperature between Prevention of cold TCJ: Temperature of indoor TC1 sensor and the highest temperature between air discharge heat exchanger sensor TC2 and TCJ sensor is set as the upper bound of the •...
  • Page 24 Item Outline of specifications Remarks Refrigerant (Oil) Indoor units during stop/thermostat OFF or FAN Control is performed per two recovery control in operation perform following controls when a refrigerant hours or when the outdoor unit cooling operation (compressor oil) recovery signal is received from determines its need.(It varies outdoor unit at the cooling operation, depending on the indoor units...
  • Page 25 Item Outline of specifications Remarks Alarm output The alarm output from the indoor P .C. board is output in each Connector CN61 setup indoor unit during group control, but it can be set so as to be (Optional connector output in the header unit and follower units. specifications of indoor Following the table below, register the setting data in DN Code "79".
  • Page 26 Item Outline of specifications Remarks Selection of 1) Selection of the contents that can be operated by the central control remote controller at the indoor unit side is possible mode according to setting at the central controller side. 2) Setting contents Operation on remote controller Operation from ON/OFF...

  • Page 27: Compact 4-Way Cassette Type

    Item Outline of specifications Remarks Louver control <<Individual air direction setup>> Subject model : (Continued) UNIT LOUVER Compact 4-way • Pushing Louver select button enables every discharge port to set up the air direction. (In the case of RBC-AMTU3∗) The louver numbers that are displayed on the display part Setup from the remote correspond to those in the following figure.
  • Page 28 Item Outline of specifications Remarks Louver control <<Selection of Swing mode>> Subject model : Compact 4-way (Continued) • For the Swing mode, the following three types of modes are selectable and settable by keeping Swing/Direction SWING/FIX button pushed for 4 seconds or more on the remote controller.
  • 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 Occupancy 1) During the Occupancy sensor operation (DN code: [B5] The Occupancy sensor sensor [0001] and [B6] [0002 to 0005]), when there is no people in can be set up by wired the Occupancy sensor range, it is automatically switched to remote controller the operation for the absence.
  • Page 31 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 32 Item Outline of specifications Remarks Secondary DN [C5] Data Secondary heating mode heating (Continued) 0000 Normal mode (Factory default) 0001 Flip mode DN [C6] Data : Set temp. out (high) [ºC] "-0015": 5ºF(-15ºC) to "0015": 59ºF(15ºC) -0015 "0000": 32ºF(0ºC) (Factory default) 0015 DN [C7] Data...
  • Page 33 Item Outline of specifications Remarks R32 refrigerant • When connecting to an outdoor unit that uses R32 refrigerant, Indoor unit type usable the following settings must be made according to the safety Safety with R32 refrigerant: system used. Compact 4-way measures * Floor standing type (Including concealed type and cabinet type) setting...

  • Page 34: 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 35: Applied Control And Functions (Including Circuit Configuration)

    8. APPLIED CONTROL AND FUNCTIONS (INCLUDING CIRCUIT CONFIGURATION) 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...

  • Page 36: 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 37 Indoor unit #1 (Header) (Follower) (Follower) Indoor control P.C. board (MCC-1643) DC20V Remote controller communication circuit EEPROM DC5V TA sensor DC12V Same Same TC1 sensor as left as left TC2 sensor Driver TCJ sensor Outside output Louver motor Start/Alarm Wireless kit Drain Application pump...
  • Page 38 8-1-3. Connection of both wired remote controller and wireless remote controller Wired header remote controller Schedule timer Function setup Display Display LCD driver Key switch EEPROM Function setup DC5V DC5V Power Display LED Key switch circuit Remote controller Power Secondary communication circuit circuit battery...

  • Page 39: Indoor Print Circuit Board

    8-2. Indoor Print Circuit Board MCC-1643 - 39 -...
  • Page 40 - 40 -...

  • Page 41: Test Run Of Indoor Unit

    8-3. Test run of indoor unit 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. Refer to the Installation Manual and Service Manual of outdoor unit for the procedure of the test run from an outdoor interface P.C.
  • Page 42 <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 43 Check function for operation of indoor unit (Functions at indoor unit side) This function is provided to check the operation of the indoor unit individually without connecting to the remote controller or the outdoor unit. This function can be used regardless of the ON/OFF operation. However, it is recommend to avoid using this function for along time, otherwise the trouble of the equipment may occurred.

  • Page 44: Method To Set Indoor Unit Function Dn Code

    8-4. Method to set indoor unit function DN code (When performing this task, be sure to use a wired remote controller.) Procedure Be sure to stop the air conditioner before making settings <RBC-AMTU3∗ ∗ ∗ ∗ ∗ > Push the buttons simultaneously and hold for at least 4 seconds.
  • Page 45 <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 46 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 47 Description Item At shipment 0001: °F ° : F ° 0000: Standard Refer to page 49 c i t 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 0002: Available...
  • Page 48 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 49 [5d] High-ceiling adjustment <Compact 4-way Cassette> Set data High-ceiling adjustment 0000 Standard (Factory default) 0001 High ceiling 1 (UP015, 018 only) 0002 High ceiling 2 (UP015, 018 only) 0003 High ceiling 3 (UP015, 018 only) Type DN code "10" Type Value Model Compact 4-way Cassette...

  • Page 50: Applied Control Of Indoor Unit

    8-5. Applied control of indoor unit Control system using Remote location ON/OFF control box (TCB-IFCB-4E2) Wiring and setting • In the case of group control, the control system functions as long as it is connected to one of the indoor units (control P.C.

  • Page 51: Operation

    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 52 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 53 [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 54 [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 55 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 56 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 57 <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 58 <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 59 Confirming the indoor unit addresses and the position of an indoor unit using the remote controller Confirming the numbers and positions of indoor units To know the indoor unit addresses though position of the indoor unit is recognized When the unit is individual (the indoor unit is paired with a wired remote controller one-to-one), or it is a group-controlled one.
  • Page 60 To find an indoor unit’s position from its address When checking unit numbers controlled as a group ∗ ∗ ∗ ∗ ∗ <RBC-AMTU3 > TEMP. ON / OFF TIMER SET MODE TIME SAVE VENT Stop FILTER RESET TEST SWING/FIX UNIT LOUVER (Execute it while the units are stopped.) The indoor unit numbers in a group are indicated one after another.
  • Page 61 <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 62 To check all the indoor unit addresses using an arbitrary wired remote controller. (When communication wirings of 2 or more refrigerant lines are interconnected for central control) ∗ ∗ ∗ ∗ ∗ <RBC-AMTU3 > TEMP. ON / OFF TIMER SET MODE TIME SAVE...

  • Page 63: Check Code Clearing Function

    Check code clearing function How to clear the check code using the wired remote controller ∗ ∗ ∗ ∗ ∗ <RBC-AMTU3 > 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 64 <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 65 Monitoring function of wired remote controller ∗ ∗ ∗ ∗ ∗ <RBC-AMTU3 > 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 66 Indoor service monitor list Code No. Data name Display format Unit Remote controller display example °F(°C) Room temperature (Use to control) ×1 °F(°C) Room temperature (Remote controller) ×1 Indoor suction air temperature (TA) ×1 °F(°C) Indoor coil temperature (TCJ) ×1 °F(°C) Indoor coil temperature (TC2) ×1...

  • Page 67: Troubleshooting

    9. TROUBLESHOOTING 9-1. Overview (1) Before engaging in troubleshooting (a) Applicable models All Super Modular Multi System (SMMS- , SHRM- ) models. ∗ ∗ (b) Tools and measuring devices required • Screwdrivers (Philips, flat head), spanners, long-nose pliers, nipper, pin to push reset switch, etc. •...

  • Page 68: Troubleshooting Method

    9-2. 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 69 (Check code detected by remote controller) Check code Display of receiving unit Outdoor 7-segment display Indicator light block Typical trouble site Description of check code Remote control Operation Timer Ready Sub-code Flash No master remote control, Signals cannot be received from indoor unit; –...
  • Page 70 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 71 Check code Display of receiving unit Outdoor 7-segment display Central Indicator light block control or main Typical problem site Description of check code remote Operation Timer Ready Sub-code Flash controller display 01: TL1 sensor Outdoor liquid temperature Outdoor liquid temperature sensor (TL1,TL2,TL3) 02: TL2 sensor sensor (TL1,TL2,TL3) has been open/short-circuited.
  • Page 72 Check code Display of receiving unit Outdoor 7-segment display Central Indicator light block control or Typical problem site Description of check code main remote Operation Timer Ready Sub-code Flash controller display 01 : Flow Selector (FS) unit (s) Flow Selector (FS) unit(s) FS unit(s) outside the application setting installation trouble"...
  • Page 73 Check code Display of receiving unit Outdoor 7-segment display Central Indicator light block Typical problem site Description of check code control or main remote Operation Timer Ready Sub-code controller Flash display Outdoor heat exchanger Remaining frost on outdoor heat exchanger –...

  • Page 74: Troubleshooting Method

    9-3. Troubleshooting based on information displayed on remote controller ∗ ∗ ∗ ∗ ∗ <RBC-AMTU3 > (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 75 <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 76 Using indoor unit indicators (receiving unit light block) (wireless type) To identify the check code, check the 7-segment display on the outdoor unit. To check for check codes not displayed on the 7-segment display, consult the “List of Check Codes (Indoor Unit)” in “9-2. Troubleshooting method”. : Blinking (0.5 seconds) : Lighting : Goes off...
  • Page 77 Light block Check code Cause of trouble Outdoor discharge (TD1) temperature trouble Operation Timer Ready Activation of outdoor high-pressure SW Open phase / power failure Inverter DC voltage (Vdc) trouble MG-CTT trouble Alternate blinking Outdoor heat sink overheating trouble - Poor cooling of electrical component (IGBT) of outdoor unit Gas leak detection - insufficient refrigerant charging Injection circuit trouble.
  • Page 78 Light block Check code Cause of trouble Compressor breakdown Operation Timer Ready Outdoor unit compressor Compressor lockup related trouble Current detection circuit trouble Blinking Wiring / installation trouble or detachment of outdoor discharge temperature sensor (TD1) Abnormal drop in low-pressure sensor (Ps) reading Protective shutdown of outdoor unit Abnormal drop in oil level...
  • Page 79 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 80: Check Codes

    9-4. Check Codes (Displayed on remote controller and 7-segment display of outdoor Unit) The contents of these check code tables differ depending on the outdoor unit to be connected. Refer to the service manual of the connected outdoor unit. (The table below is for the SMMS-u series.) Check code Location Check code detection...
  • 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 No. of indoor Indoor unit • Check power supply to Indoor-outdoor All stop Condition 1 units from communication One indoor unit or more indoor unit.
  • 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 Too many All stop • Combined capacity of • Check capacities of indoor Capacity over indoor units indoor units is too large.
  • 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 Detected Outdoor All stop Outdoor header unit • Check check code check outdoor unit No. follower unit receives trouble code from displayed on outdoor code...
  • 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 TD2 sensor All stop Sensor resistance is infinity • Check connection of TD2 trouble or zero (open/short circuit). sensor connector.
  • 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 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 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 TD1 sensor All stop Discharge temperature of • Check installation of TD1 miswiring compressor 1 (TD1) does sensor.
  • 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 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 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 Outdoor All stop Initial setting of I/F P.C. • Check model setting of — capacity not set board has not been P.C.
  • Page 89 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: Compressor Activation of All stop High-pressure SW is • Check connection of high- 1 side high-pressure activated.
  • Page 90 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 91 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 92 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. P.C.
  • Page 93 Check codes Displayed on 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 • Check remote controller controller corresponding from remote controller...

  • Page 94: Diagnostic Procedure For Each Check Code (Indoor Unit)

    9-5. Diagnostic Procedure for Each Check Code (Indoor Unit) - 94 -...
  • Page 95 - 95 -...
  • Page 96 - 96 -...
  • Page 97 - 97 -...
  • Page 98 - 98 -...
  • Page 99 - 99 -...
  • Page 100 - 100 -...
  • Page 101 - 101 -...
  • Page 102 - 102 -...

  • Page 103: Sensor Characteristics

    9-6. 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 104: Board Exchange Procedures

    10. P.C. BOARD EXCHANGE PROCEDURES Indoor unit Replacement of indoor P.C. boards 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 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...
  • Page 106 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. Type 2. If the system/indoor/group addresses are different from those Indoor unit capacity before replacement, the auto-address setting mode starts and the System address...
  • Page 107 [2] P.C. Board for indoor unit servicing replacement procedures (e.g. MCC-1643) Step1 Replace the P.C. board to the P.C. board for indoor unit servicing. At this time, perform the same setting of the jumper wire (J01, J08, J09) setting (cut), switch SW501, (short-circuit) connector CN34 as the setting of the P.C.
  • Page 108 <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 109 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 110 ∗ ∗ ∗ ∗ ∗ <RBC-AMTU3 > 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 111: Detachments

    11. DETACHMENTS Compact 4-way cassette CAUTION WARNING Be sure to stop operation of the air conditioner before Be sure to put on gloves during working time; work and then turn off switch of the breaker. otherwise an injury will be caused by a part etc. No.
  • Page 112 No. Part name Procedure Remarks 1. Detachment Adjust corner cap 1) Remove the air intake grille. (Refer to 1 of 2) Loosen the fixing screws on the adjust corner cap. (M 4 × 10, 4 pcs.) Adjust corner 3) Slide the adjust corner cap to outside to remove it. Screw 2.
  • Page 113 No. Part name Procedure Remarks 1. Detachment Control P.C. board 1) Remove the electric parts cover. (Refer to 1 of 2) Remove connectors which are connected from the control P.C. board to the other parts and then remove wiring from the clamp. NOTE Unlock the lock of the housing part and then remove the connector.
  • Page 114 No. Part name Procedure Remarks Turbo fan 1. Detachment 1) Remove the air intake grille. (Refer to 1 of Fixing screw of bell mouth Reinforcement 2) Remove the fix screws (4 positions) of the bell mouth, washer assy and then take off it. (M 4 × 8, 4 pcs) 3) Loosen the flange nut (M8) at the center part of the turbo fan, and then take off (Counter clockwise) * Supporting with hands, take off the turbo fan so that...
  • Page 115 No. Part name Procedure Remarks 1. Detachment Drain pan Fixing screws 1) Remove the ceiling panel and the electrical parts covers. (Refer to items -1 and -1.) 2) Remove the wiring cover. (Fixing screw M 4 × 8, 3pcs.) Wiring cover 3) Remove the wiring fixing plate.
  • Page 116 No. Part name Procedure Remarks 1. Detachment Drain pump 1) Remove the drain pan. (Refer to -1.) 2) Remove the drain pump connector (CN504: 2P, White) connected to the control P.C. board and remove the lead wires from the clamp. 3) Remove the fixing screws to remove the drain pump.
  • Page 117 No. Part name Procedure Remarks 1. Detachment Fan motor 1) Remove the turbo fan, electric parts cover, wiring cover and wiring fixing plate. Motor lead (Refer to -1-2, -1-3.) wire cover 2) Remove the fan motor connector (CN210, White, 7P) connected to the control P.C.
  • Page 118 No. Part name Procedure Remarks 1. Detachment 1) Remove the drain pan. (Refer to -1.) 2) Pull out the sensor to be exchanged from the sensor Sensor holder. 3) Remove the connector connected to the control P.C. board, and take off wires from the clamp. (Refer to 2.
  • Page 119 No. Part name Procedure Remarks 1. Detachment Heat exchanger 1) Recover refrigerant gas. 2) Remove the refrigerant pipe at indoor unit side. 3) Remove the drain pan. (Refer -1.) 4) Disconnect the heat exchanger sensor (TC1, TC2, TCJ), PMV lead wires connectors from the control P.C. board, and then remove their lead wires from the clamp.

  • Page 120: Exploded Views And Parts List

    12. EXPLODED VIEWS AND PARTS LIST Compact 4-way cassette type 205 204 - 120 -...
  • Page 121 Model name Location MMU-UP Part No. Description 0071MHP-UL 0091MHP-UL 0121MHP-UL 0151MHP-UL 0181MHP-UL 43T22414 BELLMOUTH 43T72411 DRAIN PAN ASSY 43T70330 DRAIN HOSE ASSY 43T44835 REFRIGERATION CYCLE ASSY 43T44836 REFRIGERATION CYCLE ASSY 43T04509 PIPE COVER ASSY 43T97001 43T22415 REINFORCEMENT WASHER ASSY 43T20371 TURBO FAN ASSY 43T21544 MOTOR FAN ASSY...

  • Page 122: Electric Parts

    Electric Parts Connector:Black 407 P.C. BOARD ASSY Connector:Red Connector:Yellow Connector:Brown Model name Location MMU-UP Part No. Description 0071MHP-UL 0091MHP-UL 0121MHP-UL 0151MHP-UL 0181MHP-UL 43T60605 TEMPERATURE SENSOR 43T50456 SENSOR,TC 43T50410 TC-SENSOR 43T60362 TERMINAL 43T60435 SERV-TERMINAL 43TNV451 PC BOARD ASSY, MCC-1643 43459017 ASM-PCB(OP) 43T50455 SENSOR,TA 43T63348...

  • Page 123: Ceiling Panel

    Ceiling panel RBC-UM21P-UL, RBC-UM21PB-UL - 123 -...
  • Page 124 Model name Location Part No. Description RBC-UM21P-UL RBC-UM21PB-UL 43T09659 AIR INLET GRILLE 43T09660 AIR INLET GRILLE 43T80373 AIR FILTER 43T21434 STEPPING-MOTOR 43T11352 AIR OUTLET FOAM A 43T11353 AIR OUTLET FOAM B 43T22416 HORIZONTAL LOUVER ASSY 43T22417 HORIZONTAL LOUVER ASSY 43T01361 PANEL COVER ASSY 43T01363 PANEL COVER ASSY...
  • Page 125 CARRIER AIR CONDITIONING (THAILAND) CO., LTD. 144/9 MOO 5, BANGKADI INDUSTRIAL PARK, TIVANON ROAD, TAMBOL BANGKADI, AMPHUR MUANGPATHUMTHANI, PATHUMTHANI 12000, THAILAND...

This manual is also suitable for:

Mmu-up0091mhp-ulMmu-up0121mhp-ulMmu-up0151mhp-ulMmu-up0181mhp-ul

Table of Contents