Toshiba Carrier MMU-AP0074HPUL Service Manual
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Toshiba Carrier MMU-AP0074HPUL Service Manual

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FILE NO. SVM-20105
SERVICE MANUAL
AIR-CONDITIONER
(MULTI TYPE)
INDOOR UNIT
<4-way cassette type>
MMU-AP0074HPUL
MMU-AP0094HPUL
MMU-AP0124HPUL
MMU-AP0154HPUL
MMU-AP0184HPUL
MMU-AP0244HPUL
MMU-AP0304HPUL
MMU-AP0364HPUL
MMU-AP0424HPUL
MMU-AP0484HPUL
MMU-AP0544HPUL
December, 2020

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  • Page 1 FILE NO. SVM-20105 SERVICE MANUAL AIR-CONDITIONER (MULTI TYPE) INDOOR UNIT <4-way cassette type> MMU-AP0074HPUL MMU-AP0094HPUL MMU-AP0124HPUL MMU-AP0154HPUL MMU-AP0184HPUL MMU-AP0244HPUL MMU-AP0304HPUL MMU-AP0364HPUL MMU-AP0424HPUL MMU-AP0484HPUL MMU-AP0544HPUL December, 2020...

  • Page 2: Table Of Contents

    Original instruction Adoption of New Refrigerant This Air Conditioner is a new type which adopts a new refrigerant HFC (R410A) instead of the conventional refrigerant R22 in order to prevent destruction of the ozone layer. CONTENTS SAFETY CAUTION ........3 1. CONSTRUCTION VIEWS (EXTERNAL VIEWS) ......13 2.

  • Page 3: Safety Caution

    • 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 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 (*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. 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 • New Refrigerant (R410A) This air conditioner adopts a new HFC type refrigerant (R410A) which does not deplete the ozone layer. 1. Safety Caution Concerned to New Refrigerant The pressure of R410A is high 1.6 times of that of the former refrigerant (R22). Accompanied with change of refrigerant, the refrigerating oil has been also changed.
  • 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 (Those which cannot be used for conventional refrigerant (R22)) 2) Tools exclusive for R410A, but can be also used for conventional refrigerant (R22) 3) Tools commonly used for R410A and for conventional refrigerant (R22) The table below shows the tools exclusive for R410A and their interchangeability.

  • Page 13: Construction Views (External Views)

    1. CONSTRUCTION VIEWS (EXTERNAL VIEWS) MMU-AP0074HPUL, MMU-AP0094HPUL, MMU-AP0124HPUL, MMU-AP0154HPUL, MMU-AP0184HPUL, MMU-AP0244HPUL, MMU-AP0304HPUL 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 Take-in port of wiring An obstacle 1.2" Bottom face of ceiling (30) 39.4"(1000)
  • Page 14 MMU-AP0364HPUL, MMU-AP0424HPUL, MMU-AP0484HPUL, MMU-AP0544HPUL 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 Refrigerant pipe connecting port Drain pipe Ø3/8"(9.5) (Liquid side)

  • Page 15: Wiring Diagram

    2. WIRING DIAGRAM - 15 -...

  • Page 16: Parts Rating

    3. PARTS RATING MMU- Model AP030 AP007 AP009 AP012 AP015 AP018 AP024 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 17: Refrigerating Cycle Diagram

    4. 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 18: Control Outline

    5. CONTROL OUTLINE 5-1. 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 19 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 20 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 21 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 22 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 23 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 24 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 25 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 26 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 SWING/FIX button pushed for 4 seconds or more on the remote controller.
  • Page 27 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 28: Configuration Of Control Circuit

    6. CONFIGURATION OF CONTROL CIRCUIT 6-1. Indoor controller block diagram (MCC-1643) 6-1-1. 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 29 6-1-2. 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 30 6-1-3. 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 31 6-2. Indoor Print Circuit Board 6-2-1. MCC-1643 - 31 -...
  • Page 32 6-3. 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 33  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 34 � 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 35 6-4. Optional Connector Specifications of Indoor P.C. Board Connector Function Specifications Remarks Fan output CN32 Shipment setup: ON with indoor unit operation and DC12V � OFF with stop are linked. * Single operation by FAN button on remote controller Output �...

  • Page 36: Applied Control

    7. APPLIED CONTROL 7-1. Setup of Selecting Function in Indoor Unit (Be Sure to Execute Setup by a Wired Remote Controller) <Procedure> Execute the setup operation while the unit stops. TEMP. ON / OFF TIMER SET MODE TIME SAVE VENT FILTER RESET TEST...
  • Page 37 Table : Function selecting CODE No. (DN) (Items necessary to perform the applied control at the local site are described.) Item Description At shipment Filter display delay timer 0000 : None 0001 : 150H 0002 : 2500H 0002 : 2500H 0003 : 5000H 0004 : 10000H Dirty state of filter...
  • Page 38 Item Description At shipment Type AP009, AP012 AP015, AP018 High ceiling selection 0000: Standard (Selection of air volume) Discharge 4-way 3-way 2-way 4-way 3-way 2-way Standard 0000 2.7m 2.8m 3.0m 2.8m 3.2m 3.5m (At shipment) 0001 High ceiling — — —...
  • Page 39 7-2. 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 [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 � Leaving-ON prevention control [Function] • This function controls the indoor units individually. It is connected with cable to the control P.C. board of the indoor unit. • In a group control, it is connected with cable to the indoor unit (Control P.C. board), and the CODE No. 2E is set to the connected indoor unit.
  • Page 42 � Address setup (Manual setting from remote controller) In case that addresses of the indoor units will be determined prior to piping work after cabling work (Example of 2-lines cabling) (Real line: Cabling, Broken line: Refrigerant pipe) • Set an indoor unit per a remote controller. •...
  • Page 43 � Confirmation of indoor unit No. position 1. To know the indoor unit addresses though position of the indoor unit is recognized • In case of individual operation (Wired remote controller : indoor unit = 1 : 1) (Follow to the procedure during operation) <Procedure>...
  • Page 44 � How to check all the unit No. from an arbitrary wired remote controller <Procedure> Carry out this procedure during stop of system. The indoor unit No. and the position in the identical refrigerant piping can be checked. An outdoor unit is selected, the identical refrigerant piping and the indoor unit No. are displayed one after the other, and then its fan and louver are on.
  • Page 45 Changing the indoor unit address using a remote controller To change an indoor unit address using a wired remote controller. The method to change the address of an individual indoor unit (the indoor unit is paired with a wired remote controller one-to-one), or an indoor unit in a group. (The method is available when the addresses have already been set automatically.) TEMP.
  • Page 46 � How to change all indoor addresses from an arbitrary wired remote controller (It is possible when setting has finished by automatic addresses.) Contents: The indoor unit addresses in each identical refrigerant piping line can be changed from an arbitrary wired remote controller. �...
  • Page 47 � Function to clear error 1. Clearing method from remote controller � How to clear error of outdoor unit In the unit of refrigerant line connected by indoor unit of the remote controller to be operated, the error of the outdoor unit currently detected is cleared. (Error of the indoor unit is not cleared.) The service monitor function of the remote controller is utilized.
  • Page 48 � Monitoring function of remote controller switch When using the remote controller (Model Name: RBC-AMT32UL), the following monitoring function can be utilized. Calling of display <Contents> The temperature of each sensor of the remote controller, indoor unit and outdoor unit and the operating status can be checked by calling the service monitor mode from the remote controller.
  • Page 49 < Based on the SMMS-e > CODE No. Data name Display format Unit Remote control display example Room temperature (Use to control) ×1 °C [0027] = 27 °C Room temperature (Remote control) ×1 °C Indoor suction air temperature (TA) ×1 °F Indoor coil temperature (TCJ) ×1...

  • Page 50: Troubleshooting

    8. TROUBLESHOOTING 8-1. Troubleshooting Summary 1. Before troubleshooting 1) Applied models SMMS (i) Multi type models � Indoor unit : MMX-APXXX, Outdoor unit : MMY-MAPXXXXT8X, MMY-MAPXXXHT7X Super Heat Recovery Multi type models � Indoor unit : MMX-APXXX, Outdoor unit : MMY-MAPXXXFT8X Mini-SMMS Multi type models �...
  • Page 51 - 51 -...
  • Page 52 - 52 -...
  • Page 53 List of check codes (outdoor unit) IPDU: Intelligent Power Drive Unit (Inverter P.C. board) (Errors detected by SMMS outdoor interface - typical examples) :Lighting, : Flashing, : Goes off ALT.: Flashing is alternately when there are two flashing LED SIM: Simultaneous flashing when there are two flashing LED Check code Display of receiving unit Outdoor 7-segment display...
  • Page 54 Check code Display of receiving unit TCC-LINK Outdoor 7-segment display Indicator light block Typical fault site Description of error central control or main remote Operation Timer Ready Sub-code Flash controller display Outdoor suction Outdoor suction temperature sensor (TS1) has – temperature sensor (TS1) been open / short-circuited.
  • Page 55 Check code Display of receiving unit Outdoor 7-segment display TCC-LINK Indicator light block Typical fault site Description of error central control or main remote Operation Timer Ready Sub-code Flash controller display Address setting has not been performed for one or SIM Indoor group address not –...
  • Page 56 (Errors detected by IPDU featuring in SMMS standard outdoor unit - typical examples) Check code Display of receiving unit TCC-LINK Outdoor 7-segment display Indicator light block Typical fault site Description of error central control or main remote OperationTimer Ready Flash Sub-code controller display...
  • Page 57 8-3. Troubleshooting by check Display on Remote Controller � In case of wired remote controller (RBC-AMT32UL) 1. Confirmation and check When a trouble occurred on the air conditioner, the check code and the indoor unit No. are displayed on the display section of the remote controller.
  • Page 58 � In case of central remote controller (TCB-SC642TLE2) ZONE ZONE GROUP CODE 1234 TEST UNIT No. SET DATA SETTING R.C. GROUP SELECT ZONE 1. Confirmation and check When a trouble occurred on the air conditioner, the check code and the indoor unit No. are displayed on the display section of the remote controller.
  • Page 59 � Indoor unit display part (Receiving unit) (Wireless type) When specifying the check code, check 7-segment display on the center unit. For the check code which is not displayed on the outdoor 7-segment, confirm it in Section “ 8-2 How to Check / Check code display list (Indoor unit) ”.
  • Page 60 Lamp indication Check code Cause of trouble occurrence  Operation Timer Ready Heat exchanger sensor (TCJ) error   Heat exchanger sensor (TC2) error  Temp. sensor error in indoor unit Heat exchanger sensor (TC1) error    Alternate flash Room temp.
  • Page 61 � Others (Except check code) Lamp indication Check code Cause of trouble occurrence Operation Timer Ready — During test run Simultaneous flash Operation Timer Ready COOL/HEAT disagreement — (Automatic cooling/heating setup to automatic cooling/heating unavailable model, heating setup to cooling only model) Alternate flash - 61 -...
  • Page 62 8-4. Check codes displayed on remote controller and SMMS 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 Error detection Outdoor 7-segment display Main Description System status...
  • Page 63 Check code Location Error detection Outdoor 7-segment display Main Description System status Check items (locations) condition(s) remote Check detection Sub-code controller code Duplicated Indoor Duplicated All stop More than one indoor unit is Check indoor addresses. unit indoor address assigned same address. indoor address Check for any change made to remote controller...
  • Page 64 Check code Location Error detection Outdoor 7-segment display Main Description System status Check items (locations) condition(s) remote Check detection controller Sub-code code Indoor Error in Stop of Periodic communication Check remote controller unit communication corresponding between indoor header and wiring. Check indoor power supply between indoor unit...
  • Page 65 Check code Location Error detection Outdoor 7-segment display Main Description System status Check items (locations) condition(s) remote Check detection controller Sub-code code • Check wiring and connectors SMMS (Series 1) IPDU All stop Communication is disrupted 01: A3-IPDU1 error communication between IPDUs (P.C.
  • Page 66 Check code Location Error detection Outdoor 7-segment display Main Description System status Check items (locations) condition(s) remote Check detection controller Sub-code code TL sensor All stop Sensor resistance is infinity Check connection of TL sensor error connector. or zero (open / short circuit).
  • Page 67 Check code Location Error detection Outdoor 7-segment display Main Description System status Check items (locations) condition(s) remote Check detection Sub-code controller code Pd sensor All stop Output voltage of Pd Check connection of Pd error sensor is zero (sensor sensor connector. open-circuited).
  • Page 68 Check code Location Error detection Outdoor 7-segment display Main Description System status Check items (locations) condition(s) remote Check detection controller Sub-code code Low oil level All stop Operating compressor <All outdoor units in protection detects continuous state of corresponding line to be low oil level for about 2 hours.
  • Page 69 Check code Location Error detection Outdoor 7-segment display Main Description System status Check items (locations) condition(s) remote Check detection controller Sub-code code Compressor 2 All stop Compressor 2 case Check Compressor 2 case thermo case thermo circuit. thermo was activation activated.
  • Page 70 Check code Location Error detection Outdoor 7-segment display Main Description System status Check items (locations) condition(s) remote Check detection controller Sub-code code SMMS Oil detection All stop The temperature Check the TK1 sensor installation. Check the TK1 sensor resistant (1 series) circuit error change of TK1 characteristics.
  • Page 71 Check code Location Error detection Outdoor 7-segment display Main Description System status Check items (locations) condition(s) remote Check detection controller Sub-code code SMMS-i Oil level All stop No temperature Check for disconnection of TK4 sensor. (4 series) detection change is detected Check resistance characteristics of circuit error by TK4 despite...
  • Page 72 Check code Location Error detection Outdoor 7-segment display Main Description System status Check items (locations) condition(s) remote Check detection Sub-code controller code Outdoor All stop Jumper wire provided on P.C. Check model setting of P.C. capacity not set board for servicing I/F P.C. board for servicing outdoor board has not been removed I/F P.C.
  • Page 73 Check code Location Error detection Outdoor 7-segment display Main Description System status Check items (locations) condition(s) remote Check detection controller Sub-code code Detected indoor Indoor External Stop of Signal is present at When external device is address unit interlock of corresponding external error input connected to CN80...
  • Page 74 Check code Location Error detection Outdoor 7-segment display Main Description System status Check items (locations) condition(s) remote Check detection controller Sub-code code Open phase detected, All stop Phase sequence Check the phase sequence of Phase sequence error error was detected outdoor power wiring.
  • Page 75 Check code Location Error detection Outdoor 7-segment display Main Description System status Check items (locations) condition(s) remote Check detection controller Sub-code code Outdoor liquid All stop <During cooling operation> Check full-close operation backflow When system is in cooling of outdoor PMV (1, 2, 4). detection error operation, high pressure is Check for defect in Pd or...
  • Page 76 Check code Location Error detection Outdoor 7-segment display Main Description System status Check items (locations) condition(s) remote Check detection Sub-code controller code Detected 4-way valve All stop Abnormal refrigerating cycle Check for defect in main outdoor unit reversing error data is collected during body of 4-way valve.
  • Page 77 Check code Location Error detection Outdoor 7-segment display Main Description System status Check items (locations) condition(s) remote Check detection controller Sub-code code SMMS (Series 1) Outdoor fan All stop (Sub code: 08) Check the fan motor. Check the connector 08: Out of step IPDU error FAN IPDU position detection connection for fan motor.
  • Page 78 Check code Location Error detection Outdoor 7-segment display Main Description System status Check items (locations) condition(s) remote Check detection controller Sub-code code ∗ SMMS-i IPDU Outdoor fan All stop Check fan motor. (Sub code: 0 (Series 4) Check for defect in fan IPDU error Fan IPDU over current ∗...
  • Page 79 Errors detected by TCC-LINK central control device Check code Location Error detection Outdoor 7-segment display Main Description System status Check items (locations) condition(s) remote Check detection controller Sub-code code TCC-LINK TCC-LINK Continued Central control device is Check for defect in central operation unable to transmit signal.
  • Page 80 8-5 Diagnostic Procedure for Each Check Code (Indoor Unit) *Please refer to the multi outdoor unit service manual excluding these. Check code [E11 error] Is the connection for the UART communication Repair of connector connector (Internal board connection. CN521 red/Optional board CN1 red) normal? Is connector...
  • Page 81 8-6. Sensor characteristics Indoor unit Temperature sensor characteristics Indoor TA sensor Temperature [˚C] Resistance [kΩ] 33.9 Resistance 26.1 [kΩ] 20.3 15.9 12.6 10.0 Temperature [˚C] Temperature [˚C] Resistance [kΩ] –20 99.9 –15 74.1 Indoor TC1 sensor –10 55.6 –5 42.2 32.8 25.4 19.8...

  • Page 82: Detachments

    9. 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 83 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 84 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 85 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 86 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 87 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 88 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 89 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 90 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 91 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 92: Replacement Of P.c.board For Indoor Unit Servicing

    (MCC-1643) 10. Replacement of P.C. Board for Indoor Unit Servicing <Models> MMU-AP****HPUL 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.
  • Page 93 TEST Step 3 After writing down all setting data, press button to return to the normal stop status. (It takes approx. 1 min until the remote control operation is available again.) CODE No.required at least The CODE No. for the Indoor unit type and Indoor unit capacity Contents are required to set the rotation number setting of the fan.
  • Page 94 UNIT LOUVER button is pressed, the indoor unit Nos. in the group control operation are displayed in Step 2 Every time when the order. (The settings stored in the EEPROM of the P.C. board for indoor unit servicing are the factory-set values.) Specify the indoor unit No.with its P.C.
  • Page 95 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 Heating suction temperature shift Automatic mode 0001 : No automatic Cooling only...

  • Page 96: Exploded Views And Parts List

    11. EXPLODED VIEWS AND PARTS LIST 11-1. Indoor Unit MMU-AP0074HPUL, MMU-AP0094HPUL, MMU-AP0124HPUL - 96 -...
  • Page 97 Model name Location MMU-AP Part No. Description 0074HPUL 0094HPUL 0124HPUL 43T20335 FAN,ASSY TURB 43T22322 BELL MOUTH 43T72361 PAN ASSY, DRAIN 43T44705 REFRIGERATION CYCLE ASSY 43T46515 COIL, PMV 43T46516 BODY, PMV 43T70326 HOSE, DRAIN 43T19357 GUARD,FAN 43T63348 CLAMP, DOWN 43T63349 CLAMP, UP 43T63347 CLAMP, WIRE 43T97311...
  • Page 98 MMU-AP0154HPUL, MMU-AP0184HPUL, MMU-AP0244HPUL, MMU-AP0304HPUL - 98 -...
  • Page 99 Model name Location MMU-AP Part No. Description 0154HPUL 0184HPUL 0244HPUL 0304HPUL 43T20335 FAN,ASSY TURB 43T22322 BELL MOUTH 43T72362 PAN ASSY, DRAIN 43T44706 REFRIGERATION CYCLE ASSY 43T44707 REFRIGERATION CYCLE ASSY 43T46515 COIL, PMV 43T46516 BODY, PMV 43T70326 HOSE, DRAIN 43T19357 GUARD,FAN 43T63348 CLAMP, DOWN 43T63349...
  • Page 100 MMU-AP0364HPUL, MMU-AP0424HPUL, MMU-AP0484HPUL, MMU-AP0544HPUL - 100 -...
  • Page 101 Model name MMU-AP Location Part No. Description 0364HPUL 0424HPUL 0484HPUL 0544HPUL 43T20334 FAN,ASSY TURB 43T22322 BELL MOUTH 43T72363 PAN ASSY, DRAIN 43T44708 REFRIGERATION CYCLE ASSY 43T46515 COIL, PMV 43T46513 BODY, PMV 43T70326 HOSE, DRAIN 43T19357 GUARD,FAN 43T63348 CLAMP, DOWN 43T63349 CLAMP, UP 43T63347 CLAMP, WIRE...
  • Page 102 11-2. Electric parts Model name MMU-AP Location Part No. Description 0074 0094 0124 0154 0184 0244 0304 0364 0424 0484 0544 HPUL HPUL HPUL HPUL HPUL HPUL HPUL HPUL HPUL HPUL HPUL 43T50411 TC-SENSOR 43T50387 TC-SENSOR (TC2) 43T50386 TC-SENSOR (TCJ) 43T60362 TERMINAL 43T60435...
  • Page 103 RBC-U32PGP(W)-UL Location Part No. Description RBC-U32PGP(W)-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 104 The possible amount of leaked refrigerant gas in rooms A, (countermeasures needed) B and C is 10kg. The possible amount of leaked refrigerant gas in rooms D, E and F is 15kg. Total amount of refrigerant - 104 - Toshiba...
  • Page 105 144/9 MOO 5, BANGKADI INDUSTRIAL PARK, TIVANON ROAD, TAMBOL BANGKADI, AMPHUR MUANG, PATHUMTHANI 12000, THAILAND.

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