Page 1 FILE NO. A10-1607 Rev.8: Dec.2020 Rev.9: Oct.2021 SERVICE MANUAL Rev.10: Aug.2022 Rev.11: Oct.2022 AIR-CONDITIONER (MULTI TYPE) OUTDOOR UNIT Model name: MCY-MHP0506HT-C* MCY-MHP0606HT-C* MCY-MHP0706HT-C* MCY-MHP0506HT MCY-MHP0606HT MCY-MHP0406HT-E* MCY-MHP0506HT-E* MCY-MHP0506HT-HK MCY-MHP0606HT-HK...
Page 2 Contents Precautions for safety ..................... 7 1 Product summary ....................14 1-1. Outdoor unit ..............................14 1-2. Connectable indoor units ........................... 14 2 Construction views ..................... 17 3 Wiring diagram ....................19 4 Parts rating ......................20 4-1. Outdoor unit ..............................20 4-2.
Page 3 8 Test operation ...................... 44 8-1. Procedure and summary of test operation ....................44 8-2. Check items before test operation (before powering-on) ................ 45 8-3. Check at main power-on..........................49 8-4. Address setup ............................. 50 8-4-1. Precautions ............................ 50 8-4-2. Address setup and check procedure..................... 50 8-4-3.
Page 4 10 Outdoor unit parts replacement methods ............... 144 11 P.C. board exchange procedures ................160 11-1. Interface P.C. board Replacement procedure (MCC-1639:43H69062) ............160 11-2. IPDU P.C.board Replacement procedure (MCC-1690:43H69201) ............162 11-3. Noisefilter P.C.board Replacement Procedure (MCC-1706:43H69063) ........... 164 11 Exploded diagram / parts list .................
Page 5 • 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 6 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. Failure to wear the proper protective gear is dangerous because you will be more susceptible to injury, burns, electric shocks and other injuries.
Page 7 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 ELECTRICAL SHOCK HAZARD Disconnect all remote electric power supplies before servicing.
Page 8 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.
Page 9 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 10 If, in the course of carrying out repairs, it becomes absolutely necessary to check out the electrical parts with the electrical control box cover of one or more of the indoor units and the service panel of the outdoor unit removed in order to find out exactly where the trouble lies, put a sign in place so that no-one will approach the Do not bring a work location before proceeding with the work.
Page 11 When the refrigerant gas leaks, find up the leaked position and repair it surely. If the leaked position cannot be found up and the repair work is interrupted, pump-down and tighten the service valve, otherwise the refrigerant gas may leak into the room. The poisonous gas generates when gas touches to fire such as fan heater, stove or cooking stove though the refrigerant gas itself is innocuous.
Page 12 Only a qualified installer or qualified service person is allowed to install the air conditioner. If the air conditioner is installed by an unqualified individual, a fire, electric shocks, injury, water leakage, noise and/or vibration may result. Before starting to install the air conditioner, read carefully through the Installation Manual, and follow its instructions to install the air conditioner.
Page 13 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 14 4. Tools (1) Required Tools for R410A Mixing of di erent 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)
Page 15 Product summary 1-1. Outdoor unit Corresponding HP Power supply Cooling capacity (kW)* Heating capacity (kW)* Single-phase MCY-MHP0506HT-C* 14.0 16.0 220V (50Hz) Single-phase MCY-MHP0606HT-C* 15.5 17.0 220V (50Hz) Single-phase MCY-MHP0706HT-C* 18.0 18.0 220V (50Hz) Single-phase MCY-MHP0506HT 220V (60Hz) 14.0 16.0 220-240V (50Hz) Single-phase MCY-MHP0606HT 220V (60Hz)
Page 16 0506HT, 0606HT, 0506HT-HK, 0606HT-HK Model type Model name 4-way Cassette MMU-AP****HP* Compact 4-way Cassette MMU-*P****MH* 2-way Cassette MMU-*P****WH* MMU-*P****YH* 1-way Cassette MMU-*P****YHP* MMU-*P****SH* Concealed Duct Standard MMD-AP****BHP* MMD-AP****H* Concealed Duct High Static Pressure MMD MMD-*P****HP* MMD-AP****S(P)H* Slim Duct MMD-*P****M(P)H(Y)* MMD-*P****SPHY* MMC-AP****H* Ceiling MMC-*P****HP*...
Page 17 1-3. Branching joints and headers*1 Model name Appearance Y-shape branching joint RBM-BY55E 4-branching header RBM-HY1043E 8-branching header RBM-HY1083E 1-4. PMV kit Model type Indoor unit capacity type Appearance RBM-PMV0363E 005 to 014 type RBM-PMV0903E 015 to 027 type *For “MM*-AP****” series indoor units Model type Indoor unit capacity type Appearance...
Page 18 Construction views...
Page 20 Wiring diagram t° t° t° t° t°...
Page 21 Parts rating Outdoor unit 4-1. Name Model Specification Comperssor DA422A3T-20MD1 Output: 5.60kW 4-way valve coil SQ-A2522G-000371 AC220-240V, 50/60Hz FQ-G593 AC220-240V, 50/60Hz SV2, SV4 valve coil Pulse motor valve coil PQ-M10012-000230 DC12V Pressure sensor (For high pressure) DC5V 0-3.92MPa YCQB04H02 Pressure sensor (For low pressure) YCQB01H01 DC5V 0-0.98MPa High-pressure SW...
Page 22 4-3. Parts layout in outdoor unit SV2 valve SV2 valve SV4 valve 4-way valve Low pressure sensor High pressure sensor High pressure SW TD sensor (Pulse Motor Valve) Check joint (Low pressure) Check joint (High pressure) TL sensor TS sensor TO sensor TE sensor...
Page 23 4-4. Parts layout in inverter assembly IPDU P.C.board Noise Filter P.C.board (MCC-1690) (MCC-1706) Interface P.C.board (MCC-1639) Power supply Communication terminal block terminal block...
Page 24 4-5. Outdoor (inverter) print circuit board 4-5-1. Interface P.C. board (MCC-1639) SW 04,05,15 Option input/output 7-segment LED Jumper select CN508 CN510 CN513 SW 01,02,03 CN511 CN509 CN512 Sensor input CN502(TD) CN505(TS) SW 06,07,09,10 CN507(T0) CN520(TE) SW 11,12,13,14 CN523(TL) SW 16,17 PMV 1 output CN300 PS sensor CN500 PD sensor CN501...
Page 25 4-5-2. Inverter P.C. board (MCC-1690) IPDU High-pressure Power supply Power supply Input (Reactor) Input (Neutral) switch input CN02(White) CN500(Red) CN05(Black and Red) Power supply Input (Live) CN01(Black) Compressor output W-phase CN203(Black) Compressor output V-phase CN202(White) Compressor output U-phase CN201(Red) UART communication CN852(White)
Page 26 Noise filter (MCC-1706) 4-5-3. CN08 (White) CN03 (Black) CN04 (White) CN01 (Black) CN02 (White)
Page 27 Refrigerant piping systematic drawing Outdoor unit Sensor (TO) Heat exchanger Sensor (TE) Strainer 4-Way valve Sensor (TS) Solenoid valve (SV4) Strainer Check joint Solenoid valve High pressure Check joint (SV2) sensor Sensor (TL) High pressure Low pressure sensor Capillary Mu ler tube Sensor (TD) Accumulator...
Page 28 Explanation of functional parts Functional part name Functional outline (Hot gas bypass) (Connector CN311 : White) 1) Low pressure release function 2) High pressure release function 3) Gas balance function during stop time 4) Hot gas bypass into accumulator (Start compensation valve of compressor) (Connector CN312: Red) Solenoid valve 1) For gas balance start...
Page 29 Control outline Outdoor unit Item Description of operation, numerical data, and other information Remarks 1. Pulse PMV1 control 1) During air conditioner operation, the pulse count of a PMV (pulse motor valve) is motor valve controlled between 30 and 500. (PMV) control 2) During cooling, the PMV opening is controlled on the basis of measurements provided by the TL temperature sensor and the PD pressure sensor (subcool...
Page 30 Item Description of operation, numerical data, and other information Remarks 2. Outdoor 2. Heating fan control 1) Outdoor fan speed (mode) is controlled on the basis of measurements provided by fan control the TE temperature sensor. (continued) 2) If TE > 25 °C is continuously detected for 5 minutes, the operation may stop. 3) For a specified period a er air conditioner startup and during defrosting, this control is disabled.
Page 31 Item Description of operation, numerical data, and other information Remarks 5. Defrosting 2. Details of defrosting control • To protect the refrigerating cycle circuit, the fan mode control 1) The compressor currently in operation is operated at the standby operation speed. may be controlled during 2) When a specified amount of time passes from the time the compressor reached the (reverse...
Page 32 Item Description of operation, numerical data, and other information Remarks High pressure release control This function is to correct the operation command of the compressor and suppress the rise of high pressure. 1. Cooling frequency release control 1) Control contents The operation frequency is decreased by 1 step when PD pressure ≥...
Page 33 Item Description of operation, numerical data, and other information Remarks 8. IPDU 2. Heat sink temperature detection control • IPDU is provided with a TH control 1) This control performs the IGBT overheat protection by the detection of the TH sensor.
Page 34 <Other points to note> Cooling operation under low outside temperature conditions 1) If pressure falls to extremely low levels, indoor units may be shut down via freeze prevention control based on the indoor TC sensor. 2) If pressure falls to extremely low levels, frequency may be reduced via cooling capacity control. 3) When the discharge temperature sensor reading falls below 60 °C, the frequency may be increased above the level called for by the command received from the indoor unit.
Page 35 Applied control for outdoor unit Priority operation mode setting (cooling / heating / number of units / or priority indoor unit) functions are made available by setting relevant switches provided on the interface P.C. board of the outdoor unit. 7-1. Priority operation mode setting Purpose / characteristics This function allows switching between priority cooling and priority heating.
Page 36 (2) Indoor unit setup method for priority indoor unit mode The setting can be changed only when the system is at rest. (Be sure to turn o the system prior to this operation.) Press the [Menu] button and [▼] button simultaneously and hold for at least 10 seconds.
Page 37 7-2. Applied control of outdoor unit 7-2-1. Optional P.C. board of outdoor unit installation Placing position Install the optional P.C. boards on top of the power supply terminal block in the outdoor unit. Be sure to turn off the power switch before installing. (1) Holes for installing supports are provided on the top of the power supply terminal block in the electrical box.
Page 38 Optional control P.C. boards provide access to a range of functions as listed below. Control P.C. board to be used Outdoor unit interface P.C. board setting* Function Jumper to be PCDM4E PCMO4E PCIN4E Connector No. DIP SW No. removed Power peak-cut control (Standard) –...
Page 39 7-2-2. Power peak-cut control (standard) L1: Display lamp ensuring power peak cut control Outdoor unit Locally procured Optional PCB Power Display supply Outdoor unit relay interface PCB [OPERATION] Shield wire PJ17 CN513 SW07 [ON] [OFF] Bit 2 OFF Shield Connection cable wire For SW1 and SW2, be sure to provide no- voltage contacts for each terminal.
Page 40 <SW07 Bit 2 OFF (two-step control)> Power peak-cut control is enabled as long as SW1, as shown on the wiring diagram, is ON (continuously). SW07 Bit 1 Indicator relay Input Jumper wire Bit 1 OFF Bit 1 ON (L1) 0 % (forced stop) 60 % capacity (upper limit regulated) 100 % (normal operation) 100 % (normal operation)
Page 41 7-2-4. Snowfall fan control Outdoor unit Locally procured Connection Outdoor unit Optional PCB Snowfall sensor cable interface PCB COOL CN509 PJ17 Shield HEAT wire SW1: Snowfall detection switch (snowfall sensor) Operation An external snowfall signal turns on the outdoor unit fan. Terminal Input signal Operation...
Page 42 7-2-6. Night operation (sound reduction) control Outdoor unit Locally procured Connection Outdoor unit Optional PCB cable interface PCB COOL CN509 PJ17 HEAT Shield wire SW1: Night time signal switch Operation This function decreases noise at night or other times as necessary. Terminal Input signal Operation...
Page 43 7-2-7. Operation mode selection control Outdoor unit Locally procured Connection Outdoor unit Optional PCB cable interface PCB COOL HEAT Shield wire SW1: Cooling mode specified input switch SW2: Heating mode specified input switch NOTE SW1: COOL mode selection switch SW2: HEAT mode selection switch Input signal Operation Remarks...
Page 44 7-2-8. Error / Operation output Locally procured Outdoor unit (See “NOTE”) Outdoor unit Optional PCB interface PCB OUTPUT1 SW16 CN511 PJ20 OUTPUT2 OUTPUT3 Shield wire Operation In-operation output: An in-operation indication signal is output as long as at least one indoor unit is in operation in the line.
Page 45 Test operation 8-1. Procedure and summary of test operation A test operation is executed with the following procedure. When a problem occurs at any step, remove the causes of the problem referring to “9 Troubleshooting.” This main power supply check shall be done before operation Checks before test operation switch turns ON This main power supply check shall be done before operation...
Page 46 8-2. Check items before test operation (before powering-on) Prior to the test operation, check the following items to verify there are no problems with the installation work. Main check items for electric wiring The communication system di ers from that of R22 or R407 refrigerant “Modular Multi system” air conditioners. Check wiring points again carefully.
Page 47 (2) In the case that a central control system is connected (before address setup) Central remote controller (1) (2) To other refrigerant line Other refrigerant line SW13 SW14 CN10 SW13 SW14 Outdoor unit CN10 CN02 SW30 CN02 SW30 To indoor unit (U1) (U2) (U1)
Page 48 Checklist 1 Using Checklist 1, check that there are no problems with the installation work. Is the capacity of the circuit breaker Outdoor unit Indoor unit (Earth leakage breaker) appropriate? Is the gauge of the power Outdoor unit Indoor unit cable correct? Is the control communication line correct? Indoor-outdoor connection terminals (U1, U2)
Page 49 Checklist 2 Calculate the additional amount of refrigerant from the following: Corrective amount of Additional refrigerant Additional refrigerant Compensation by Real length of liquid refrigerant depending charge amount per 1 m charge amount at local outdoor HP pipe on the indoor units liquid pipe site (Table 3)
Page 50 8-3. Check at main power-on A er turning on the main power of the indoor units and outdoor unit in the refrigerant line to conduct a test operation, check the following items in each outdoor and indoor unit. (A er turning on the main power, be sure to check in order: indoor unit outdoor unit.) <Check on the outdoor unit>...
Page 51 8-4. Address setup This product requires address setup before operation. Follow this procedure for address setup. 8-4-1. Precautions Address setup is not performed simply by turning on the power supply. For indoor units, address setup can be done either by manual address setup or by automatic address setup: Automatic address setup: Setup from SW15 on the interface P.C.
Page 52 8-4-3. Address setup procedure No central control (Single refrigerant line): go to Address setting procedure 1 Central control of 2 or more refrigerant lines: go to Address setting procedure 2 When controlling a single refrigerant line When controlling 2 or more refrigerant lines (Example) centrally centrally...
Page 53 (Example) Controlling 2 or more refrigerant lines as a group Outdoor Outdoor System wiring diagram Indoor Indoor Indoor Indoor (Group control) Remote controller Address setting procedure 2 Set a line address for each system using SW 13 and 14 on the interface P.C. board on the outdoor unit of each system.
Page 54 Be sure to disconnect the relay connectors CN10 which mounted interface P.C. board from CN02, on all the outdoor unit that will be connected to the central control. CN02 CN10 Communication terminal board Turn on indoor units first, and then turn on outdoor unit. About 1 minute a er turning the power on, confirm that the 7-segment display on the interface P.C.
Page 55 Set the central control address. (For the setting of the central control address, refer to the installation manuals of the central control devices.) Outdoor unit interface P.C. board 7-segment display SW30 * Outdoor units are connected to the same central control, except the outdoor unit with the smallest line address number.
Page 56 Switch setting (setting example when controlling 2 or more refrigerant lines centrally) Outdoor units (setting manually) *The items in bold font must be set manually. Outdoor unit’s Outdoor unit Outdoor unit Outdoor unit Factory default interface P.C. board SW13, 14 (Line (system) address) DIP switch 2 of SW30 Set to OFF...
Page 57 Manual address setting with 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 58 Press the [▼] or [▲] button to adjust the indoor unit number, and press the [Time] button to confirm. <Pipeline (System) Address> Use the [▼] or [▲] button to set the CODE No. to [12]. Use the [Menu] button to make SET DATA on the le blink instead of CODE No., and press the [▼] or [▲] button to set line address.
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 see the indoor unit address of an indoor unit having location data. 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 [Menu] [Time] [▼] [▲] [ON/OFF] When the indoor unit is stopped, press the [Menu] button and [▼] button simultaneously and hold for at least 10 seconds. •...
Page 61 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.) SET DATA [Menu] [Time]...
Page 62 Resetting the address (Resetting to the factory default (address undecided)) Method 1 Clearing each address separately using a wired remote controller. Set the line address, indoor unit address and group address to “0099”, using a wired remote controller. (For the setting procedure, refer to the address setting procedures using the wired remote controller on the previous pages.) Method 2 Clearing all the indoor unit addresses on a refrigerate line at once from the outdoor unit.
Page 63 Turn on the indoor and outdoor units of the refrigerant line to be initialized in addresses. About one minute a er turning on the power, confirm that the 7-segment display on the outdoor unit indicates “U.1. - - -” and operate the interface P.C. board on the outdoor unit of the refrigerant line as follows.
Page 64 In the case of an increase in address-undefined indoor units (extension, etc.) To set up the indoor address of a unit with an address that is undefined due to the extension of indoor units or replacement of P.C. board, etc., follow the methods below. Method 1 Set up an address individually from a wired remote controller.
Page 65 8-4-4. Check a er address setup when central control system is connected When the central control system is connected, check that the following setup has finished a er address setup. Central remote controller To other refrigerant line Line address = 2 Other refrigerant line Outdoor unit Outdoor unit...
Page 66 8-5. Troubleshooting in test operation If there are phenomena such as the output of a check code or the remote controller is not accepted when powered- on a er wiring work or during address setup operation, the following causes are considered. 8-5-1.
Page 67 8-5-2. Operation from the indoor remote controller is not accepted, and a check code is displayed on the 7-segment display of the interface P.C. board of the outdoor unit. Outdoor Indoor remote unit 7- controller Cause Countermeasures segment status display Line addresses and indoor addresses of all the connected Set up addresses.
Page 68 8-5-4. In checking the number of connected outdoor units and connected indoor units a er address setup, a lower number of connected units is displayed. (There are outdoor / indoor units that do not operate in a test operation.) Status Cause Countermeasures Miswiring of communication lines between indoor units...
Page 69 8-6. Test operation check 8-6-1. Fan check START Check code appears Push the Start / Stop button on the remote controller. When a check code has been displayed on the remote controller, remove the cause of the check code, referring to "Check code and check position displayed on remote controller and Check code...
Page 70 8-6-2. Cooling / Heating test operation check The cooling / heating test operation check can be performed on both the indoor remote controller and the outdoor unit interface P.C. board. (1) Test operation start / stop operation Test operation from the indoor remote controller •...
Page 71 Wireless remote controller (Except the 4-way Wireless remote controller (Ceiling type and Cassette type,Ceiling type and 1-way Cassette 1-way Cassette SH type) SH type) Procedure Operation content Start Procedure Operation content Push Temporary operation button. Start • The operation mode is the one last selected. Push Temporary operation button.
Page 72 (2) Test operation START Refer to "Test operation procedure" Test operation for one indoor unit of the indoor remote controller. The operation does not start for approximately 3 minutes a er Operation starts powering-on or stopping operation. Note: A er powering-on, it may require up to 10 minutes to start the operation due to the initial communications of the system.
Page 73 Note 1: Criteria for the di erence between suction and discharge temperatures (1) Cooling operation A er operating for a minimum of 30 minutes in “COOL” mode, if the T dry bulb temperature di erence between suction and discharge air of the indoor unit is 8 °C or more, it is normal. (2) Heating operation A er operating for a minimum of 30 minutes in “HEAT”...
Page 74 8-7. Service support function 8-7-1. Check function for connecting of refrigerant and control lines This function is provided to check misconnection of the refrigerant pipes and the control transmission line (Wiring over lines) between indoor unit and outdoor unit by using the switch on the interface P.C. board of the outdoor unit. However, be sure to check the following items prior to executing this check function.
Page 75 Operation start (7-segment display) Press the push-switch SW04 on the interface P.C. board of the outdoor unit for 2 seconds or more. The operation starts. Cooling Operation Check that 7-segment display [B] shows [CC] for Heating cooling and [ HH] for heating. Confirmation of check results (1) (7-segment display) This check operation...
Page 76 8-7-2. Function to start / stop (ON / OFF) indoor unit from outdoor unit The following functions of the indoor unit can start or stop by the switches on the interface P.C. board of the outdoor unit. Function Outline Setup / Release 7-segment display Cooling test Changes the mode of all the...
Page 77 (1) Cooling test operation function This function is provided to change collectively the mode of all the indoor units connected to the same system for the cooling test operation mode, by using switches on the interface board of the outdoor unit. <Operation procedure>...
Page 78 (2) Heating test operation function This function is provided to change collectively the mode of all the indoor units connected to the same system for the heating test operation mode, by using switches on the interface board of the outdoor unit. <Operation procedure>...
Page 79 (3) Batch start / stop (ON / OFF) function This function is provided to start / stop collectively all the indoor units connected to the same system by using switches on the interface board of the outdoor unit. <Operation procedure> Be sure to turn on the power at indoor Power ON side before power-ON of outdoor unit.
Page 80 (4) Individual start / stop (ON / OFF) individual test operation function This function is provided to start / stop (ON / OFF) individually each indoor unit connected to the same system by using switches on the interface board of the outdoor unit. Set SW01 [16] and set SW02, SW03 to indoor address No.
Page 81 8-7-3. Check code clearing function (1)Clearing from the main remote controller Check code clearing in outdoor unit Check code of the outdoor unit currently detected is cleared by the unit of one refrigerant circuit system to which the indoor units operated by the remote controller is connected. (Check code of the indoor unit is not cleared.) For clearing check codes, the service monitor function of the remote controller is used.
Page 82 (2) Clearing check code by using switches on the interface board of the outdoor unit Using the switches on the interface P.C. board of the outdoor unit, this function is to clear the currently detected check code for each refrigerant circuit system without resetting the power supply. Check codes in both outdoor and indoor units are once cleared, and check code detection is performed again.
Page 83 8-7-4. Remote controller distinction function This function is provided to distinguish the remote controller connected to the indoor unit from the outdoor unit for a refrigerant circuit system by using switches on the interface P.C. board of the outdoor unit. <Distinction procedure>...
Page 84 8-7-5. Pulse motor valve (PMV) forced open / close function in indoor unit This function is provided to open or close forcedly PMV for 2 minutes in all the indoor units by the switch operation on the interface P.C. board of the outdoor unit. This function is also used to open PMV fully when turning o the power and executing an operation.
Page 85 8-7-7. Solenoid valve forced open / close function in outdoor unit This function is provided to forcedly open each solenoid valve mounted in the outdoor unit by the switch operation on the interface P.C. board in the outdoor unit. Use this function to check there is no refrigerant clogging with ON / OFF operation of the solenoid valve.
Page 86 8-7-8. Fan operation check in outdoor unit This function is provided to check the fan operation of the outdoor unit by using switches on the interface P.C. board in the outdoor unit. The frequency of the fan speed can be controlled by setting of the switches. Use this function to check the operation or abnormal sound in the fan system.
Page 87 8-7-9. Manual adjustment function of outside temperature (TO) sensor This function is provided to fix TO sensor value manually by the switch operation on the interface P.C. board in the outdoor unit. When the unit stops abnormally due to TO sensor failure, etc, an emergent operation is available by setting up the value manually to position near the current outside temperature.
Page 88 8-7-10. Service support function list SW01 SW02 SW03 7-segment display [A] Function contents Refrigerant circuit and control communication line check function (Cooling [J . C] operation) Refrigerant circuit and control communication line check function (Heating [J . H] operation) [P. ] Indoor PMV forced full open function [A 1] Indoor remote controller discriminating function...
Page 89 8-7-11. Monitor function of remote controller switch When using a remote controller with the model name RBC-ASCU11-C, the following monitor functions can be used. Calling of service monitor display screen <Content> The sensor temperature or operation status of the remote controller, indoor unit, or the outdoor unit can be known by calling up the service monitor mode from the remote controller.
Page 90 Troubleshooting 9-1. Overview (1) Before engaging in troubleshooting (a) Applicable models Indoor units: MMO-OPOOO, Outdoor units: MCY-MHPOOO6 (b) Tools and measuring devices required • Screwdrivers (Philips, flat head), spanners, long-nose pliers, nipper, pin to push reset switch, etc. • Multimeter, thermometer, pressure gauge, etc. (c) Things to check prior to troubleshooting (behaviors listed below are normal) Behavior Possible cause...
Page 91 9-2. Troubleshooting method The remote controllers (main remote controller and central controller) and the interface P.C. board of an outdoor unit are provided with an LCD display (remote controller) or 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 92 (Check code detected by main remote controller) Check code Display of receiving unit Outdoor 7-segment display Indicator light block Main Typical trouble site Description of check code remote Operation Timer Ready Sub-code controller Flash No master remote controller, troubled Signals cannot be received from indoor unit; master remote controller communication remote controller has not been set (including two remote –...
Page 93 List of Check Codes (Outdoor Unit) IPDU: Intelligent Power Drive Unit (Inverter P.C. board) : Lighting, : Flashing, : Goes o (Check codes detected by outdoor interface - typical examples) 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...
Page 94 Display of receiving unit Check code Indicator light block Outdoor 7-segment display TCC-LINK Typical trouble site Description of check code central control or main remote Operation Timer Ready Sub-code controller Flash display Outdoor EEPROM is troubled (alarm and Outdoor EEPROM check –...
Page 95 (Errors detected by IPDU featuring in outdoor unit - typical examples) Check code Display of receiving unit Outdoor 7-segment display Indicator light block TCC-LINK Typical trouble site Description of check code central control or main remote Operation Timer Ready Sub-code controller Flash display...
Page 96 9-3. Troubleshooting based on information displayed on remote controller Using main remote controller (RBC-ASCU11-C) (1) Checking and testing When a trouble occurs to an air conditioner, a check If the air conditioner fails, the timed shutdown instruction code and indoor unit No. are displayed on the display alternately displays the check code and the number of the faulty indoor unit.
Page 97 Using TCC-LINK central remote controller (TCB-SC642TLE2) (1) Checking and testing Display of Unit No. Display of check code 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 Alternate blinking conditioner is in operation.
Page 98 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”.
Page 99 Light block Chcek code Cause of check code Discharge temperature sensor (TD) trouble Operation Timer Ready Heat exchanger temperature sensor (TE) trouble Liquid temperature sensor (TL) trouble Outdoor unit temperature sensor Outside air temperature sensor (TO) trouble troubles Alternate blinking Suction temperature sensor (TS) trouble Heat sink sensor (TH) trouble Wiring trouble in heat exchanger sensor (TE) and liquid temperature sensor (TL)
Page 100 9-4. Check codes displayed on remote controller and 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 Outdoor 7-segment display Check code detection Description System status Check items (locations)
Page 101 Check code Location Check code detection Outdoor 7-segment display Main Description System status Check items (locations) condition(s) remote detection Check controller Sub-code code In two remote controller • Check remote controller Remote Duplicated Stop of corresponding configuration (including settings. controller master remote controller unit...
Page 102 Check code Location Outdoor 7-segment display Check code detection Description System status Check items (locations) Main condition(s) remote detection Check controller Sub-code code Stop of Indoor Indoor TCJ Sensor resistance is infinity or • Check connection of TCJ corresponding sensor connector and unit sensor trouble zero (open / short circuit).
Page 103 Check code Location Check code detection Outdoor 7-segment display Description System status Check items (locations) Main condition(s) remote detection Check controller Sub-code code IPDU TH sensor trouble All stop • Trouble in IGBT built-in Sensor resistance is zero (short temperature sensor circuit).
Page 104 Check code Location Check code detection Outdoor 7-segment display Description System status Check items (locations) Main condition(s) remote detection Check controller Sub-code code IPDU All stop Current detection Current flow of at least • Check current detection circuit trouble specified magnitude is circuit wiring.
Page 105 Check code Location Check code detection Outdoor 7-segment display Description System status Check items (locations) Main condition(s) remote detection Check controller Sub-code code Connection of There is at least one stand- • Check indoor addresses. Indoor Stop of group control alone indoor unit to which unit corresponding...
Page 106 Check code Location Check code detection Outdoor 7-segment display Description System status Check items (locations) Main condition(s) remote detection Check controller Sub-code code IPDU Activation of All stop High-pressure SW is • Check connection of high-pressure activated. high-pressure SW connector. •...
Page 107 Check code Location Check code detection Outdoor 7-segment display Description System status Check items (locations) Main condition(s) remote detection Check controller Sub-code code • Inverter DC voltage is too • Check for trouble in outdoor Inverter DC All stop high (overvoltage) or too low P.C.
Page 108 Check code Location Check code detection Outdoor 7-segment display Description System status Check items (locations) Main condition(s) remote Check detection controller Sub-code code All stop • Check for insu iciency in 01: TS Protective shutdown due to leakdetection sustained suction temperature refrigerant quantity.
Page 109 Check code Location Check code detection Outdoor 7-segment display Description System status Check items (locations) Main condition(s) remote Check detection controller Sub-code code (Sub code: *0) All stop *0: IGBT short IPDU Outdoor fan • Check fan motor. Fan IPDU over current •...
Page 110 Errors detected by TCC-LINK central control device Check code Location Outdoor 7-segment display Check code detection Description System status Check items (locations) Main condition(s) detection remote Sub-code controller TCC-LINK TCC-LINK central Continued Central control device is • Check for trouble in central control device.
Page 111 Points to Note When Servicing Compressor (1) When checking the outputs of inverters, remove the wiring from the compressors. How to Check Inverter Output (1) Turn o the power supply. (2) Remove compressor leads from the IPDU P.C. board. (Be sure to remove all the leads.) (3) Turn on the power supply and start cooling or heating operation.
Page 112 9-5. Diagnosis procedure for each check code...
Page 135 9-6. 7-segment display function 7-segment display on outdoor unit (interface P.C. board) The interface control P.C. board features a 7-segment LED display designed to check operational status. Display items can be changed by changing the combination of the number settings of rotary switches provided on the P.C. board (SW01, SW02 and SW03).
Page 136 (1)Display of system information (displayed on outdoor unit) SW01 SW02 SW03 Display detail Refrigerant name Display refrigerant name Refrigerant R410A System capacity A [4]~[6]:4 to 6HP [HP ] Total capacity of indoor units A [i. No. of indoor units connected / No. A […0.]~[12.]:0 to 12 (No.
Page 137 (2)Display of outdoor unit information (displayed on outdoor unit) SW01 SW02 SW03 Display detail Outdoor unit No.: [U1] Check code data Check code (only latest one displayed) If there is no check code, [– – –] is displayed. If there is sub-code, check code [ ] and sub-code [–...
Page 138 (3)Display of outdoor cycle data (displayed on outdoor unit) SW01 SW02 SW03 Display detail PD pressure data PD pressure (MPaG) is displayed in decimal format. (MPaG: Approx. 10 times magnitude of kg/cm P d. PS pressure data PS pressure (MPaG) is displayed in decimal format. P S.
Page 139 (4)Display of indoor unit information (displayed on outdoor unit) Display detail SW02 SW02 SW03 Indoor BUS communication signal B Upon receiving signal: [… … 1], Other times: [… … …] receiving status Indoor check code B No check code: [– – –] Indoor HP capacity 0.6 to 6.0 HP : […0.6] to […6.0] Indoor request command...
Page 140 9-7. Sensor characteristics Outdoor Unit Temperature sensor characteristics Outdoor TS, TE, TL and TO sensors Temperature [°C] Resistance [k ] 101.7 76.3 57.7 44.0 33.8 Resistance 26.1 [k ] 20.4 (10 °C or below) Resistance [k ] 16.0 (10 °C or above) 12.6 10.0 33.8k...
Page 141 Outdoor Unit Pressure sensor characteristics • Input / output wiring summary High pressure side (PD) Low pressure side (PS) Pin No. Input / output name Lead wire color Input / output name Lead wire color OUTPUT White — — — —...
Page 142 Indoor TC1 sensor Temperature [°C] Resistance [k ] Resistance Resistance [k ] [k ] (10 °C or below) (10 °C or above) Temperature [°C] Indoor TC2 and TCJ sensors Temperature [°C] Resistance [k ] Resistance Resistance [k ] [k ] (10 °C or below) (10 °C or above) Temperature [°C]...
Page 143 9-8. Pressure sensor output check Outdoor Unit Pd sensor characteristics 0 to 3.92 MPa (0.5 to 4.5 V output for 0 to 3.92 MPa) Voltage readings across pins 1 and 3 of CN501 on I/F P.C. board (with negative-side probe of multimeter placed on pin 3) VOLT VOLT...
Page 144 Outdoor Unit Ps sensor characteristics 0 to 0.98 MPa (0.5 to 3.5 V output for 0 to 0.98 MPa) Voltage readings across pins 2 and 3 of CN500 on I/F P.C. board (with negative-side probe of multimeter placed on pin 3) VOLT VOLT VOLT...
Page 145 Outdoor unit parts replacement methods The pictures used in the replacement methods only take the 0506HT-C type as an example. The internal structure of other models is slightly different, but it does not affect the repair according to the following steps. Step Component Procedure Remarks...
Page 146 Step Component Procedure Remarks 1. Detachment Discharge cabinet 1) Remove the front panel and upper panel. [Step.1] 2) Remove the screws of the discharge cabinet top of the heat exchanger plate. (M4×10, 1) (Fig. 2-1) Heat exchanger plate screw (1 position) Discharge cabinet (Fig.
Page 147 Step Component Procedure Remarks 1. Detachment Side panel Side panel 1) Remove the front panel and upper panel. [Step.1] 2) Remove the screws of side panel and heat Heat exchanger plate exchanger plate. (M4×10, 3) (Fig.3-1, 3-2) 3) Remove the screws of the side panel and bottom plate.
Page 148 Step Component Procedure Remarks Interface Interface P.C. board WARNING attachment plate P.C.board attachment plate Do not detach the inverter for 5 minutes after Lead wire clamps turning off the breaker as doing so may cause (2 positions) electric shocks. Banding band (2 position) 1.
Page 149 Step Component Procedure Remarks Termina Terminal WARNING attachment plate attachmentl plate Do not detach the inverter for 5 minutes after turning off the breaker as doing so may cause electric shocks. 1. Detachment 1) Remove the front panel and upper panel. [Step 1] 2) Remove the 4 screws fixing the terminal attachment plate to remove it.
Page 150 Step Component Procedure Remarks IPDU P.C. IPDU P.C. WARNING board board assembly assembly Do not detach the inverter for 5 minutes after turning off the breaker as doing so may cause electric shocks. 1. Detachment 1) Remove the front panel , upper panel, discharge panel, side panel, interface P.C.
Page 151 Step Component Procedure Remarks Interface P.C. WARNING board Interface P.C. board Do not detach the inverter for 5 minutes after turning off the breaker as doing so may cause electric shocks. 1. Detachment Support hooks 1) Remove the front panel, and perform 4) of Step 4. (8 positions) [Step 1 , 4) of Step 4] 2) Remove the support hooks (8 positions) fixing the...
Page 152 Step Component Procedure Remarks IPDU P.C. WARNING board Do not detach the inverter for 5 minutes after turning off the breaker as doing so may cause electric shocks. 1. Detachment Banding band (2 positions) Banding band (1 position) 1) Remove the front panel, upper panel, side panel, (Fig.
Page 153 Step Component Procedure Remarks Reactor Reactor WARNING Do not detach the inverter for 5 minutes after turning off the breaker as doing so may cause electric shocks. 1. Detachment 1) Remove the front panel , upper panel, side panel, interface P.C. board attachment plate, terminal attachment plate, and perform 2)~6) of Step 9.
Page 154 Step Component Procedure Remarks 1. Detachment Fan motor 1) Remove the front panel,upper panel, discharge cabinet and fan motor lead. [step1, step2 and 3 of step6] 2) Cut the banding band (Fig.11-1). 3) Remove the connector connected between the fan motor and IPDU P.C.
Page 155 Step Component Procedure Remarks 1. Removing the malfunctioning compressor Compressor Connection replacement (suctionpipe) 1) Collect the refrigerant gas with the recovery TD sensor equipment. 2) Remove the front panel, upper panel, discharge cabinet, side panel, and P.C. board assemblies. Connection [Step.1, Step.2, Step.3, Step.4, Step.5, Step.6] (discharge pipe) 3) Remove the screws of the packed valve(Gas-side)
Page 156 Step Component Procedure Remarks 1. Installation of compressor Compressor Sound insulation mat installation 1) Install the compressor in the reverse procedure of (Outside-2) × 1 Sound insulation removal. mat (Inside) × 1 Sound insulation mat Suction pipe CAUTION (Outside-2) × 1 Sound insulation Discharge pipe mat (Inside) ×...
Page 157 Step Component Procedure Remarks 1. Detachment PMV coil 1) Remove the front panels, and upper panel. [Step.1] 2) Remove the connector connected between the interface P.C. board and PMV coil. PMV coil and body CN300 ..PMV coil (6P: white) 3) Remove the lead wire from the lead wire clamp (1 position) and the banding band (1 position).
Page 158 Step Component Procedure Remarks 1. Detachment Fan guard Screws (2 positions) 1) Remove the discharge cabinets. [Step.2] Discharge cabinet CAUTION Fan guard For scratch protection, work on a carton box, cloth, or the like. 2) Remove the screws from the discharge cabinet and fan guard knob.
Page 159 Step Component Procedure Remarks 1. Detachment Heat exchanger 1) Collect the refrigerant gas with the recovery assembly equipment. Screws heat exchanger-inverter 2) Remove the front panel , upper panel, discharge assemble (2 positions) panel, and side panel. [Step 1, Step 2, Step 3] 3) Remove the TO sensor holder, TE sensor, and Screws heat binding bands (3 position).
Page 160 Step Component Procedure Remarks 1. Detachment Handle (Front panel) 1) Remove the front panel. [Step.1] Cushioning 2) Remove the cushioning without tearing it. (Fig.17-1) 3) Use a flathead screwdriver or something to press on the 3 clamp hooks on the handle. (Fig.17-2) 2.
Page 161 P.C. board exchange procedures 11-1. Interface P.C.board Replacement procedure (MCC-1639: 43H69062) 1. Applicable models MCY-MHP0506HT-C* MCY-MHP0606HT-C* MCY-MHP0706HT-C* MCY-MHP0506HT MCY-MHP0606HT MCY-MHP0506HT-HK MCY-MHP0406HT-E* MCY-MHP0506HT-E* MCY-MHP0606HT-HK 2. Shipped parts list Please make sure that before you do the work, the following parts are shipped all. Parts name Quantity P.C.board Replacement Procedure Manual...
Page 162 (5) Cut the jumper wires of the service P.C. board as indicated in the table below. These settings are di erent from the settings for the jumpers on the P.C. board (malfunctioning board) prior to its replacement. If the model setting is not selected, inspection code “L10” will be displayed, and the outdoor unit operation will remain stopped.
Page 163 11-2. IPDU P.C.board Replacement procedure (MCC-1690: 43H69201) Applicable models MCY-MHP0506HT-C* MCY-MHP0606HT-C* MCY-MHP0706HT-C* MCY-MHP0506HT MCY-MHP0606HT MCY-MHP0506HT-HK MCY-MHP0406HT-E* MCY-MHP0506HT-E* MCY-MHP0606HT-HK 2. Shipped parts list Please make sure that before you do the work, the following parts are shipped all. Parts name Quantity P.C.board Replacement Procedure Manual Service P.C.board MCC-1690 (IPDU P.C.board) in Antistatic air cap Card Spacer(No.③) in Plastic bag...
Page 164 IPDU P.C.board (43H69201) Card spacer Single-touch spacer Screw (M4×14) Screw (M4×8) Used to secure the lead wire P.C.board Screw tightening torque: 1.2 ±0.1 N•m First remove the Screws , and then Screw(M3×20) remove the P.C. board assembly. Used to secure the rectifiers Screw tightening torque: 0.55±0.1 N•m Screw (M4×8) Used to secure the lead wire...
Page 165 11-3. Noisefilter P.C.board Replacement Procedure (MCC-1706: 43H69063) 1. Applicable models MCY-MHP0506HT MCY-MHP0606HT MCY-MHP0406HT-E* MCY-MHP0506HT-E* MCY-MHP0506HT-C* MCY-MHP0606HT-C* MCY-MHP0706HT-C* MCY-MHP0506HT-HK MCY-MHP0606HT-HK 2. Shipped partslist Please make sure that before you do the work, the following parts are shipped all. Parts name Quantity P.C.board Replacement Procedure Manual Service P.C.board MCC-1706 (Noisefilter P.C.board) in Antistatic air cap 3.
Page 166 Noisefilter P.C.board Single-touch spacer (43H69063) Screw (M3×20) P.C.board A er removing Screws (M4x8) screw , remove the P.C. board Used to secure lead wires assembly. Screw tightening torque: 1.2 ±0.1 N•m Card edge spacer Screws (M4x8) Used to secure lead wires Push this in the Screw tightening torque: direction of the arrow to...
Page 167 Exploded diagram / parts list...
Page 168 43H22017 BASE, ASSY, MOTOR 43H00031 PANEL, ASSY, OUT 43H00032 PANEL, ASSY, FRONT, LOWER 43H02005 PANEL, ASSY, SIDE, LOWER 43H00033 PANEL, ASSY, TOP 43H19004 GUARD, FAN 43H19014 GUARD, FAN 43H19013 PLATE, STAY 43H07004 GUARD, FIN, SIDE 43H07005 HANDLE 43H15002 MARK, TOSHIBA...
Page 169 Inverter assembly PC BOARD ASSY MCC-1690 PC BOARD ASSY,INTERFACE, MCC-1639 TS SENSOR TD SENSOR TO SENSOR TE SENSOR TL SENSOR LEAD ASSY,COMPRESSOR BLACK WHITE PC BOARD ASSY MCC-1706 TERMINAL (3P,AC600V/60A)
Page 170 Q'ty/Set MCY-MHP 0606HT-C*, Ref.No. Part No. Description 0506HT-C*, 0506HT, 0706HT-C*, 0606HT, 0406HT-E*, 0506HT-E* 0506HT-HK 0606HT-HK 43H69062 PC BOARD ASSY, INTERFACE, MCC-1639 43H69063 PC BOARD ASSY, NOISE-FILTER, MCC-1706 43H69201 PC BOARD ASSY, IPDU, MCC-1690 43H60001 LEAD ASSY, COMPRESSOR 43H60011 TERMINAL, 3P (AC600V/60A) 43H50034 SENSOR, TD 43H50005...
Page 171 0.3 kg/m The possible amount of leaked refrigerant gas in rooms A, B (countermeasures and C is 10kg. needed) The possible amount of leaked refrigerant gas in rooms D, E and F is 15kg. Total amount of refrigerant Toshiba...
Page 172 This service manual provides relevant explanations about new outdoor unit. Please refer to the following service manuals for each indoor units. Model name SVM File No. <4-way Cassette Type> MMU-UP***1HY-C (Made in China model) A10-1911 MMU-AP***4HY-C (Made in China model) A10-1402 MMU-AP***2H-C (Made in Japan model) A11-008...
Page 173 Toshiba Carrier Air Conditioning (China) Co., Ltd. Revision record First issue New type adds index Revision 1 Supply power Jun.2017 Wiring diagram New type adds Connectable indoor units Construction views Revision 2 Wiring diagram Aug.2017 Picture P20/P143/P147 Night operation control...

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Toshiba MCY-MHP0706HT-C Series Service Manual

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