Carrier MMK-UB0361HP-UL Service Manual
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Carrier MMK-UB0361HP-UL Service Manual

Carrier MMK-UB0361HP-UL Service Manual

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FILE NO. SVM-24107
SERVICE MANUAL
MULT TYPE
<High Wall Types>
MMK-UB0301HP-UL
MMK-UB0361HP-UL
R454B
February, 2025

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Summary of Contents for Carrier MMK-UB0361HP-UL

  • Page 1 FILE NO. SVM-24107 SERVICE MANUAL MULT TYPE <High Wall Types> MMK-UB0301HP-UL MMK-UB0361HP-UL R454B February, 2025...

  • Page 2: Table Of Contents

    Original instruction Adoption of new Refrigerant This Air Conditioner uses R454B an environmentally friendly refrigerant. CONTENTS PRECAUTION FOR SAFETY ................NEW REFRIGERANT (R454B) ............... 1. SPECIFICATIONS ..................DIMENSIONAL DRAWING ............... WIRING DIAGRAM ................... PARTS RATING..................REFRIGERANTING CYCLE DIAGRAM ........... CONTROL OUTLINE ................7.
  • Page 3 SAFETY CAUTION Please read carefully through these instructions that contain important information and ensure that you understand them. Generic Denomination: Air Conditioner 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 This mark is for R454B refrigerant only. Refrigerant type is written on nameplate of outdoor unit. WARNING In case that refrigerant type is R454B, this unit uses a flammable refrigerant. (Risk of fire) If refrigerant leaks and comes in contact with fire or heating part, it will create harmful gas and there is risk of fire.

  • Page 6: Precaution 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: Cautions On Installation/Service

    Refrigerant (R454B) This air conditioner adopts HFC type refrigerant (R454B) which does not deplete the ozone layer. 1. Safety Caution Concerned to Refrigerant The pressure of R454B is high 1.6 times of that of the former refrigerant (R22). 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 refrigerant during installation work or service work.
  • Page 12 4. Tools 1. Required Tools for R454B 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 R454B (Those which cannot be used for conventional refrigerant (R22)) 2) Tools exclusive for R454B, but can be also used for conventional refrigerant (R22) 3) Tools commonly used for R454B and for conventional refrigerant (R22) The table below shows the tools exclusive for R454B and their interchangeability.

  • Page 13: Specifications

    1. SPECIFICATIONS High wall type Model name MMK-UB0301HP-UL MMK-UB0361HP-UL 8.80 10.60 (kW) Cooling Capacity (Btu/h) 30000 36000 10.00 11.70 (kW) Heating Capacity (Btu/h) 34000 40000 1Ph. 208/230V ~ 60Hz. Power supply Running current 0.48 0.52 Electrical characteristics Power consumption 0.058 0.066...

  • Page 14: Dimensional Drawing

    2. DIMENSIONAL DRAWING - 14 -...

  • Page 15: Wiring Diagram

    3. WIRING DIAGRAM - 15 -...

  • Page 16: Parts Rating

    4. PARTS RATING 4-1. Parts Rating Parts Name Type Specications Output (Rated) 61W, 280V DC Fan motor ICF-280-61-2 4 phase, DC 12V Louver motor MP24Z4N 10kΩ at 77°F (25°C) 20.4''(518mm) Thermo. Sensor (TA sensor) 10kΩ at 77°F (25°C) Ø0.24''(6), 17.7''(450mm) Heat exchanger sensor (TC sensor) 10kΩ...

  • Page 17: Refrigeranting Cycle Diagram

    5. REFRIGERANTING 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 CN82 (6P): Blue) 1) Controls super heat in cooling operation 2) Controls under cool in heating operation...

  • Page 18: Control Outline

    6. CONTROL OUTLINE 6-1. Indoor Unit Control Specifications Item Outline of specifications Remarks Power supply (1) Distinction of outdoor unit • Judgment of outdoor unit is reset. When the power supply is reset, the outdoor units are • Exchange of cooling-only distinguished, and control is exchanged according to the unit distinctive results.
  • Page 19 Item Outline of specifications Remarks (1) In heating operation, the upper limit of the fan tap is set by Prevention of one with higher temperature of TC2 sensor and TCJ cold air sensor. discharge • In D and E zones, priority •...
  • Page 20 Item Outline of specifications Remarks Cooling oil While the outdoor unit is recovering cooling oil (refrigerant), the • Recovery operation (refrigerant) indoor units perform the following control tasks: normally takes place recovery control [common for operational (cooling thermo ON/thermo OFF/FAN), roughly every 2 hours.
  • Page 21 Item Outline of specifications Remarks Filter sign display (1) The operation time of the indoor fan is integrated and (None in wireless type) stored in memory, and the filter exchange signal is sent to the remote controller to display on the remote controller LCD after the specified time.
  • Page 22 Item Outline of specifications Remarks Hi POWER When you press the Hi POWER button during cooling, operation heating or A operation, the air conditioner will start the (Wireless remote following operation. control specific • Cooling operation operations) Performs the cooling operation at 2.0F°(1°C) lower than the setting temperature.
  • Page 23 Item Outline of specifications Remarks PRESET operation To operate the air conditioner with the setting (Wireless remote memorized. control specific (1) Press the PRESET button. The setting memorized operation) will be indicated and the air conditioner operates with regards to the setting. •...
  • Page 24 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 25 Item Outline of specifications Remarks Secondary DN [C5] Data Secondary heating mode heating (Continued) 0000 Normal mode (Factory default) 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 26: Communication Type, Model Names And The Maximum Number Of Connectable Units

    7. COMMUNICATION TYPE, MODEL NAMES AND THE MAXIMUM NUMBER OF CONNECTABLE UNITS If TU2C-Link (U series) is combined with TCC-Link (other than U series), the wiring specifications and the maximum number of connectable indoor units during group control operation will be changed. (1) For wiring specifications, carry out the installation, maintenance, or repair according to the attached Installation Manual.

  • Page 27: Configuration Of Control Circuit

    8. CONFIGURATION OF CONTROL CIRCUIT 8-1. Indoor Controller block diagram (MCC-1696) 8-1-1. Connection of wired remote controller Wired header remote controller (Up to 2 link) Display LCD Function setup Key switch Display LED DC5V Remote controller Power circuit communication circuit Central control remote controller (Sold separately)
  • Page 28 8-1-2. Connection of Wireless Remote Controller Central control remote controller (Sold separately) Follower unit Indoor unit #1 Header unit Indoor control P.C. board (MCC-1696) Central control communication circuit DC20V Remote controller communication circuit DC12V EEPROM Receiver and Display P.C. board DC5V TA sensor (WP-033)
  • Page 29 8-2. Indoor P.C. Board MCC-1696 - 29 -...
  • Page 30 Wall-Type P.C. Board Optional Switch/Connector Specifications Connector Function Specifications Remarks OFF: No terminator resistor, Setup at shipment OFF: No terminator resistor. Terminator resistor Bit 1 ON: Terminator resistor provided Only 1 unit is ON during central control by custom only. provided/Not provided SW01 OFF: Remote controller A...
  • Page 31 8-3. 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 32 In case of wireless remote controller REQUIREMENT 1. For the operation procedure, be sure to follow the matter. 2. Finish the forced cooling operation in a short time because it applies excessive strength to the air condi- tioner. 3. A test operation of forced heating is unavailable. Perform a test operation by heating operation using the switches of the remote controller.
  • Page 33 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 34: 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-AWSU52-UL> Press [ Menu] to open the “Menu” Press and hold [ Menu] and [ ] at the same time to open “Field setting menu” ...
  • Page 35 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 36 Description Item At shipment ° : F ° 0001: °F 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 0002: Available 0000: Unavailable...
  • Page 37 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 38 Type DN code “10” Value Type Model MMU-UB****HP-UL 4 Way Cassette 0001 MMK-UB****HP-UL 0008 High wall *1 Default value stored in EEPROM mounted on service P.C. board Indoor Unit Capacity DN code “11” Setting data Type Disable 0000 * 0013 0015 * EEPROM initial value on the P.C.board for indoor unit servicing.

  • Page 39: Control Items

    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 40: Ventilating Fan Control From Remote Controller

    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 41 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 42 [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 43 [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 44 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 45 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 46 <RBC-AWSU52-UL> Operating LED Lights while operating. TA sensor selection Model name label Pair the indoor unit to set and the remote controller one-to-one. Turn on the power. Press [ Menu] to open the “Menu” Press and hold [ Menu] and [ ] at the same time to open “Field setting menu”...
  • Page 47 <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 48 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-AWSU52-UL>...

  • Page 49: Check Code Clearing Function

    Check code clearing function How to clear the check code using the wired remote controller <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]...
  • Page 50 Monitoring function of wired remote controller <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 51: Troubleshooting

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

  • Page 52: 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 53 (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 54 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 55 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 56 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 57 (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 58 10-3. Troubleshooting by check Display on Remote Controller <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.
  • Page 59 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 “9-2. Troubleshooting method”. : Blinking (0.5 seconds) : Lighting : Goes off...
  • Page 60 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 61 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 62 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 63 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 64 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 65 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 66 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 67 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 68 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 When DN code • There is no Detected indoor Indoor unit Leak Detector • Check Malfunction LED of 06B = 0001 or communication from Leak Detector.
  • Page 69 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 70 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 71 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 72 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 73 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 74 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 75 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 76 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 77 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 78: Diagnostic Procedure For Each Check Code (Indoor Unit)

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  • Page 91 10-6. Sensor Characteristics Indoor Unit Temperature sensor characteristics Indoor TA sensor Temperature Resistance [˚F (˚C)] [kΩ] Resistance 32 (0) 33.9 [kΩ] 41 (5) 26.1 50 (10) 20.3 59 (15) 15.9 68 (20) 12.6 77 (25) 10.0 86 (30) 95 (35) 104 (40) 113 (45) 122 (50)

  • Page 92: Replacement Of Service P.c. Board

    11. REPLACEMENT OF SERVICE P.C. BOARD Replacement of P.C. Board for Indoor Unit Servicing <Models> MMK-UB***1HP-UL Series <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. When replacing the P.C. board for indoor unit servicing, follow the procedures below. After replacement completes, confirm whether the settings are correct by checking the indoor unit No.,Group header unit/ follower unit settings and perform the cooling cycle confirmation through the trial operation. <Replacement procedures> Case 1 Before replacement, the indoor unit can be turned on and the setting data can be read out by wired remote control operation. EEPROM data read out [1] (Refer to page 1) Replacement of P.C. board for Indoor unit servicing and power on [2] (Refer to page 2.) Writing the read out EEPROM data [3] (Refer to page 2.) Power reset(for all indoor units connected to the remote control when the group operation control is performed.) Case 2 The EEPROM before replacement is defective and the setting data cannot be read out. Writing the setting data to EEPROM, such as high ceiling installation setting and optional connection setting, etc., based on the customer information. [3] (Refer to page 2.) Power reset (for all indoor units connected to the remote control when the group operation control is performed.) [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 [        Menu] to open the "Menu" Step 2 Push and hold [        Menu] and [       ] at the same time to open "Field setting menu".    (Push and hold 4 seconds.) Step 3 Push [       ] and [       ] to select " DN setting", and then push [       Set / Fix]. Step 4 Select "Indoor unit", and the push  [       Set / Fix].
  • Page 93 CODE No.required at least 1. The CODE No. for the Indoor unit type and Indoor unit capacity Contents are 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 manual resetting may be required again. Indoor unit address (when the multiple units group operation including twin system.) Group address Communication protocol 1FC Indoor Unit terminating resistance [2] P.C. Board for indoor unit servicing replacement procedures Step 1 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 SW01, SW02 (short-circuit) connector CN34 as the setting of the P.C. board before replacement. Step 2 It is necessary to set Indoor unit to be exchanged : Remote controller = 1:1 Based upon the system configuration, turn on power of the indoor unit with one of the following items. 1) Single (Individual) operation Turn on power of the indoor units and proceed to  [3]. 2) Group operation A) In case that power of the exchanged indoor unit only can be turned on Turn on  power of the exchanged indoor unit only and proceed to  [3]. B) In case that power of the indoor units cannot be turned on individually (Case 1) a) Remove temporarily the group wire connected to the terminal blocks A and B of the exchanged indoor unit.
  • Page 94 [3] Writing the setting data to EEPROM (The settings stored in the EEPROM of the P.C. board for indoor unit servicing are the factory-set values.) Step 1 Push [        Menu] to open the "Menu" <Fig. 1 RBC-AWSU5*-UL> Step 2 Push and hold [        Menu] and [       ] at the same time to open "Field setting menu". Room 12:00 (Mon)    (Push and hold 4 seconds.) Step 3 Push [       ] and [       ] to select " DN setting", and then push [       Set / Fix]. Set temp. (Cool) Step 4 Select "Indoor unit", and the push  [       Set / Fix]. Step 5 For group operation, all connected room in the system are displayed. ON/OFF    Select the unit whose EEPROM contents you want to read and push [       Set / Fix].       The fan of the selected indoor unit operates and the flap swings. Step 6 Push [       ] to black highlight the code (DN), and then push [       ] and [       ] to set the code     (Set the indoor unit type and capacity) The factory-set values shall be written to the EEPROM by changeing the type and capacity. 1. Set the CODE No. (DN) to 10 (without change) 2. Push [       ] to black highlight the data, and then push [       ] and [       ] to set the type.    (Refer to Type DN code "10" on page 4.) 3. After finishing setting the data of the code (DN), push [       Set / Fix]       "Continues ?" is displayed. 4. To set the data of other codes (DN), push [       Set / Fix] 5. Push [       ] to black highlight the code (DN), and then push [       ] and [       ] to set the code No. to 11.  6. Push [       ] to black highlight the data, and then push [       ] and [       ] to set the capacity.    (Refer to indoor unit capacity DN code "11" on page 4.) 7.
  • Page 95 Table 1.Setting data(CODE No. table(example)) Item Setting data Factory­set 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 Heating suction temperature shift 0002 : +2°C Automatic mode 0001 : No automatic Cooling only 0000 : Heat pump Type Depending on model type Indoor unit capacity According to capacity type Line address 00Un/0099 : Unfixed Indoor unit address 00Un/0099 : Unfixed Group address 00Un/0099 : Unfixed Flap type (Wind direction adjustment) Depending on Type Temperature range of cooling/heating 0003 : 3 deg (Ts±1.5) automatic SW control point Automatic restart of power failure 0001 : Enable 0000 : None Selection of option / Trouble input 0002 : None (TCB­PCUC2E: CN3) Themo output SW 0000 : Thermo ON HA terminal (CN61) select 0000 : Usual (HA terminal)

  • Page 96: How To Replace Main Parts

    12. HOW TO REPLACE THE MAIN PARTS WARNING • Since high voltages pass through the electrical parts, turn off the power without fail before proceeding with the repairs. Electric shocks may occur if the power plug is not disconnected. • After the repairs have been completed (after the front panel and cabinet have been installed), perform a test run, and check for smoking, unusual sounds and other abnormalities.
  • Page 97 Part name Procedures Remarks Front panel 1) Follow to the procedure in the item 2) Securely remove screws (3 pcs.) at the front panel. 3) Open 4 screw caps and securely remove [How to open screw cap] screws (4 pcs.) at the front panel. Step 1) Push up screw cap Screw cap Step 2) Lower screw cap...
  • Page 98 Part name Procedures Remarks Electric part 1) Follow the procedure item 3 . box assembly 2) Remove screw holding the electric part cover then remove fixing screw of base camp and remove it. TA sensor Connectors Fan motor connector Louver motor Base clamp Ground line connector...
  • Page 99 Part name Procedures Remarks Horizontal louver 1) Remove shaft of the horizontal louver Drain pan from the drain pan. (First remove 2 the Bend and center shafts then remove the other shafts.) remove Horizontal louver (Back) Horizontal louver (Front) 1) Follow the procedure item 3 . Drain hose 2) The drain hose can be removed by removing Drain pan...
  • Page 100 Part name Procedures Remarks 1) Follow to the procedure in the item ③ Drain pan Middle connector Unit display assembly 2) Remove screw holding the electric part cover. 3) Remove fixing screws of the unit display and remove unit display. 4) Disconnect the middle connector of louver motor code (5P) 5) Remove 2 fixing screws from the drain pan...
  • Page 101 Part name Procedures Remarks Vertical louver 1) Follow the procedure item 3 and 7 . assembly 2) Remove fixing screw from the vertical louver set then remove them from the body back. Vertical louver set Screw Fan motor Follow the procedure item 3 , 7 and 8 . Loosen the set screw of the cross flow fan.
  • Page 102 Part name Procedures Remarks Follow the procedure item 3 , 7 and 8 . Cross flow fan Heat exchanger Loosen the set screw of the cross flow fan. (Refer to the 9 for how to remove set screw.) Remove 4 fixing screws from the bearing base then remove it from the main unit.
  • Page 103 Part name Procedures Remarks Heat exchanger Follow the procedure item ③ and ④. Heat exchanger (Evaporator) Remove 4 fixing screws at the left side of the heat exchanger. Screw Heat exchanger Remove 3 fixing screw at the upper right side of the heat exchanger.
  • Page 104 Part name Procedure Remarks Installation position (Inside Indoor Unit) Gas Leak Detection 1. Detachment 1) Follow the procedure item 3 2) Remove the fixing screws (2 positions) of gas leak detection sensor Gas leak detection sensor Gas Leak Detection Sensor position Screws 2 Pcs.

  • Page 105: Exploded Views And Parts List

    13. EXPLODED VIEWS AND PARTS LIST Indoor Unit - 105 -...
  • Page 106 Model name Location MMK-UB****HP-UL Part No. Description 0301 0361 43T09606 GRILLE OF AIR INLET ASSY 43T80356 AIR FILTER 43T00842 FRONT PANEL ASSY 43T00771 CAP SCREW ASSY 43T22362 HORIZONTAL LOUVER FRONT 43T22363 HORIZONTAL LOUVER BACK 43T2D303 GEAR ASSY 43T21527 MOTOR-LOUVER 43T72374 DRAIN PAN ASSY 43T70325 DRAIN HOSE ASSY...
  • Page 107 Indoor Unit (Part-E) Model name Location MMK-UB****HP-UL Part No. Description 0301 0361 43TNV646 PC BOARD ASSY (MCC-1696) 43T60448 TERMINAL 43T60078 TERMIMAL BLOCK 43T50391 SENSOR; THERMOSTAT 43T50410 TC-SENSOR 43T50414 TC-SENSOR 43T50306 TEMPERATURE SENSOR 43T60548 ASM-HOUSING(PW) 43T60546 ASM-HOSING(BUS) 43T60545 ASM-HOUSING(REM) 43T60539 ASM-HOUSING(MOV) 43T6V932 PC BOARD ASSY 43T63356...

  • Page 108: Warnings On Refrigerant Leakage

    WARNINGS ON REFRIGERANT LEAKAGE Important Check of Concentration Limit The room in which the air conditioner is to be installed requires a design that in the event of NOTE 2 : refrigerant gas leaking out, its concentration will The standards for minimum room volume are as follows. not exceed a set limit.
  • Page 109 CARRIER AIR CONDITIONING (THAILAND) CO., LTD. 144/9 MOO 5, BANGKADI INDUSTRIAL PARK, TIVANON ROAD, TAMBOL BANGKADI, AMPHUR MUANGPATHUMTHANI, PATHUMTHANI 12000, THAILAND...

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