Toshiba HFCR407C Service Manual
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Toshiba HFCR407C Service Manual

Toshiba HFCR407C Service Manual

Multi splite type system hfc r407c
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A90-0132
Modular
Multi System
Service Manual
Air Conditioner - Multi Split Type System
HFC
R407C

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Summary of Contents for Toshiba HFCR407C

  • Page 1 A90-0132 Modular Multi System Service Manual Air Conditioner - Multi Split Type System R407C...
  • Page 3 Contents Introduction ......................... 5 Summary ..........................8 Outline of MMS (Modular Multi System) ................10 Parts Specifications ......................12 Construction Views – Outdoor Units ................. 21 Construction Views – Indoor Units ..................22 Wiring Diagrams ........................ 31 Refrigerant Piping Systematic Drawings ................44 Combined Refrigerant Piping Systematic Drawings ............
  • Page 5 Introduction Precautions Please read these instructions carefully before starting the installation. This equipment should only be installed by suitably trained operatives. In all cases ensure safe working practice: Observe precautions for persons in the vicinity of the works. Ensure that all local, national and international regulations are satisfied. Check that the electrical specifications of the unit meet the requirements of the site.
  • Page 6 Explanation of Toshiba serial number A serial label is attached to all Toshiba air conditioning units. Located on the label is an 8-digit number, which represents the month, year and batch number of the manufactured unit. A breakdown of the 8-digit number is defined below.
  • Page 7 Introduction Components Outdoor unit Corresponding HP Inverter unit Fixed-speed unit 8 HP 10 HP 6 HP 8 HP 10 HP Model name MM-A0224HT MM-A0280HT MM-A0160HX MM-A0224HX MM-A0280HX Cooling capacity (kW) 22.4 28.0 16.0 22.4 28.0 Heating capacity (kW) 25.0 31.5 18.0 25.0 31.5...

  • Page 8: Operating Conditions

    Summary Operating conditions • The units referred to within this manual conform with the protection requirements of Directives 89/336/EEC Electromagnetic Compatibility and 73/23/EEC Low voltage. • Operating conditions of the unit are as follows: Outdoor temperature -5 ~ 43°C Cooling -15 ~ 21°C Heating Room temperature...
  • Page 9 Summary Operating conditions Model name OUTDOOR MM-A0280HT A – Outdoor 0280 – 28 kW (10 HP) C - Cooling T – Inverter 0224 – 22.4 kW (8 HP H - Heating X – Fixed-speed 0160 – 16.0 kW (6 HP) INDOOR MM-TU056 Built-In Duct Type...
  • Page 10 Branching Combination of line and header branching is highly flexible. This allows for the shortest design route possible, thereby saving on installation time and cost. Line/header branching after header branching is only available with Toshiba’s Multi Modular System. Line branching...
  • Page 11 Outline of MMS (Modular Multi System) • Compact design The design of the Toshiba MMS outdoor unit allows for • Non-polarized control wiring between outdoor and indoor units easy unit maneuvering into any standard lift. Its size also allows it to be easily installed in limited spaces.
  • Page 12 Parts specifications Indoor units Type Appearance Model name Capacity code Cooling Heating capacity (kW) capacity (kW) 4-Way Cassette MM-U056 Type ‘U’ MM-U080 MM-U112 11.2 12.8 MM-U140 14.0 15.8 2-Way Cassette MM-TU028 Type ‘TU’ MM-TU042 MM-TU056 Built-In Slim Duct MM-SB028 Type ‘SB’ Built-In Duct MM-B056 Type ‘B’...

  • Page 13: Outdoor Units

    Parts specifications Outdoor units COMPRESSOR MODEL MM-A0280HT MM-A0224HT MM-A0280HX MM-A0224HX MM-A0160HX MM-A0280CT MM-A0224CT MM-A0280CX MM-A0224CX MM-A0160CX Model name MG1450CW-21B YG1800CW-B1 YG1700CW-B1 YG890C-B1 Motor type 3-phase induction motor Power supply 380-415 V, 3 ph, 50 Hz Output (kW) Pole (P) 2/2 (INV./Fixed) 2/2 (Fixed/Fixed) Coil resistance (Ω) 1.18/2.25 (INV./Fixed)
  • Page 14 Parts specifications Indoor units Built-In Duct: MM-B140 PARTS NAME TYPE SPECIFICATIONS Fan motor STF-200-140-4F Output (rated) 140 W, 4 pole, 200 V, 1 phase, 50 Hz AC 400 V, 10 μF Running capacitor – Fan motor EAG40M106UF Pulse motor valve EDM-B60YPTF-7B-A Capacity: 60 Built-In Duct: MM-B112 PARTS NAME...
  • Page 15 Parts Specifications Indoor units Ceiling: MM-C140, MM-CR140 PARTS NAME TIPO SPECIFICATIONS Fan motor SMF-230-75-4B Output (rated) 75 W, 4 pole, 230 V, 1 phase, 50 Hz AC 400 V, 4 μF Running capacitor – Fan motor EEP2G405HQA114 Pulse motor valve EDM-B60YPTF-7B-A Capacity: 60 Ceiling: MM-C112, MM-CR112 PARTS NAME...
  • Page 16 Parts specifications Indoor units High wall: MM-K080, MM-KR080 PARTS NAME TYPE SPECIFICATIONS Fan motor MMF-230-27-4R Output (rated) 27 W, 4 pole, 230 V, 1 phase, 50 Hz Running capacitor – Fan motor EEP2W205HQA107 AC 400 V, 2 μF Pulse motor valve EDM-B40YPTR-7B-A Capacity: 40 High wall: MM-K056, MM-KR056 PARTS NAME...
  • Page 17 Parts specifications Indoor units Chassis: MM-N080 PARTS NAME TYPE SPECIFICATIONS Fan motor SMF-230-34-4O Output (rated) 34 W, 4 pole, 230 V, 1 phase, 50 Hz AC 500 V, 1,5 μF Running capacitor – Fan motor EEP2H155HQA107 Pulse motor valve EDM-B40YPTR-7B-A Capacity: 40 Chassis: MM-N056 PARTS NAME TYPE...
  • Page 18 Parts specifications Indoor units Low wall: MM-S080, MM-SR080 PARTS NAME TYPE SPECIFICATIONS Fan motor SMF-230-34-4D Output (rated) 34 W, 4 pole, 230 V, 1 phase, 50 Hz AC 450 V, 2,5 μF Running capacitor – Fan motor EEP2W255HQA113 Pulse motor valve EDM-B40YPTR-7B-A Capacity: 40 Low wall: MM-S056, MM-SR056 PARTS NAME...
  • Page 19 Parts specifications Indoor units 2-way cassette: MM-TU056 PARTS NAME TYPE SPECIFICATIONS Fan motor PAF-230-7-4 Output (rated) 7 W, 4 pole, 230 V, 1 phase, 50 Hz Running capacitor – Fan motor EEP2H105HQA105 AC 500 V, 1 μF Pulse motor valve EDM-B40YPTR-7B-A Capacity: 40 2-way cassette: MM-TU042 PARTS NAME...
  • Page 20 Parts specifications Indoor units 4-way cassette: MM-U140 PARTS NAME TYPE SPECIFICATIONS Fan motor MMF-230-36A Output (rated) 36 W, 6 pole, 230 V, 1 phase, 50 Hz Running capacitor – Fan motor EVM45M305UF AC 450 V, 3 μF Pulse motor valve EDM-B60YPTR-7B-A Capacity: 60 4-way cassette: MM-U112 PARTS NAME...

  • Page 21: Construction Views

    Construction views Outdoor units MM-A0280HT, MM-A0280HX, MM-A0224HT, MM-A0224HX, MM-A0160HX MM-A0280CT, MM-A0280CX, MM-A0224CT, MM-A0224CX, MM-A0160CX Grounding part of Base bottom plate 4 - 15 x 20 (slot) Fixing bolt pitch Base Fixing bolt pitch Base bolt position Refrigerant pipe connecting port (Gas side) braze connection (∅A) Refrigerant pipe connecting port (Liquid side) flare connection (∅B)

  • Page 22: Indoor Units

    Construction views Indoor units Built-In Duct MM-B056, MM-B080, MM-B112, MM-B140 Hanging bolt N x ∅ 200 Unit dimension: 800 4 - M10 air outlet Hanging bolt pitch: 565 provided at site A (Unit dimension) 6 x ∅ 4 holes (∅160) Refrigerant pipe B (Hanging bolt pitch) connection...
  • Page 23 Construction views Indoor units Built-In Slim Duct MM-SB028...
  • Page 24 Construction views Indoor units Low wall HR-PE Drain piping joint MM-S056, MM-SR056 Raccordo tubo drenaggio MM-S080, MM-SR080 Tubo duro cloruro di vinile Hard vinyl chloride pipe diametro esterno mm. 20 Alternative knock-out Foro incompleto Collegamento tubo outer dia. 20 mm hole for drain piping Collegamento tubo alternativo...
  • Page 25 Construction views Indoor units Chassis MM-N028, MM-N042, MM-N056, MM-N080 Space required for service and installation Piastra superiore/Piastra condotto Upper plate/duct plate Minimo Minimo Minimum Posizione di fissaggio Uscita aria t Fixing location to floor/base Air outlet al pavimento/alla base 2 x ∅4.7 hole Foro Hx¯...
  • Page 26 Construction views Indoor units Ceiling MM-C042, MM-CR042, MM-C056, MM-CR056 MM-C080, MM-CR080, MM-C112, MM-CR112, MM-C140, MM-CR140 /CHR-PE Raccordo tubo drenaggio Drain piping joint /CHR-PE Tubo duro cloruro di /CHR-PE vinile diametro Hard vinyl chloride pipe Alternative knock-out esterno mm. 20 outer dia. 20 mm /CHR-PE Collegamento tubo Collegamento tubo...
  • Page 27 Construction views Indoor units High wall MM-K042, MM-K056, MM-K080, MM-KR042, MM-KR056, MM-KR080 Refrigerant pipe Refrigerant pip connection connection (Liquid ∅ C) (Liquid øC) Refrigerant pipe Refrigerant pip connection connection (Gas ∅ B) (Gas øB) Air outlet (Both sides) Air outlet (Both sides) Piping hole 4-way adjustable...
  • Page 28 Construction views Indoor units 2-way cassette MM-TU028, MM-TU042, MM-TU056 Refrigerant piping joint (Liquid ∅ 6.4) Drain pipe joint (outer ∅ 25.5) Hanger bolt (4 x M10) Refrigerant piping joint (Gas ∅ 12.7) Channel for routing TC sensors and pressure sensor leads Panel outer dimension 1050 Ceiling opening 1010 Hanging bolt pitch 930...
  • Page 29 Construction views Indoor units 4-way cassette MM-U056, MM-U080 Refrigerant pipe connection (Gas ∅ A) Refrigerant pipe connection (Liquid ∅ B) Wiring connection Ceiling Drain pipe connection (Gland plate 3 x ∅ 20 holes) (1” BSP threaded connection) Knock-out for side ducts ∅ 150 (both sides) Fresh air inlet Condensate pipe...
  • Page 30 Construction views Indoor units 4-way cassette MM-U112, MM-U140 Knock-out for side ducts ∅ 150 Refrigerant pipe (both sides) connection (Gas side ∅19.0) Refrigerant pipe connection (Liquid side ∅9.5) Ceiling Wiring connection Drain pipe connection Ceiling panel (Gland plate 3 x ∅ 20 holes) (1”...

  • Page 31: Wiring Diagrams

    Wiring diagrams Outdoor units Inverter unit (10 HP, 8 HP) MM-A0280HT, MM-A0224HT 1 2 1 2 1 2 1 2 1 2 1 2...
  • Page 32 Wiring diagrams Outdoor units Fixed-speed unit (10 HP, 8 HP) MM-A0280HX, MM-A0224HX 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3...
  • Page 33 Wiring diagrams Outdoor units Fixed-speed unit (6 HP) MM-A0160HX MM-A0160CX 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3...
  • Page 34 Wiring diagrams Outdoor units Inverter unit (10 HP, 8 HP) Cooling only MM-A0280CT, MM-A0224CT 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3...
  • Page 35 Wiring diagrams Outdoor units Fixed-speed unit (10 HP, 8 HP) Cooling only MM-A0280CX, MM-A0224CX 1 2 1 2 1 2 1 2 1 2 1 2...
  • Page 36 Wiring diagrams Indoor units Built-In Duct MM-B140, MM-B112, MM-B080, M-B056...
  • Page 37 Wiring diagrams Indoor units Ceiling MM-C042, MM-CR042, MM-C056, MM-CR056 MM-C080, MM-CR080, MM-C112, MM-CR112 MM-C140, MM-CR140...
  • Page 38 Wiring diagrams Indoor units Wall unit MM-K042, MM-K056, MM-K080, MM-KR042, MM-KR056, MM-KR080...
  • Page 39 Wiring diagrams Indoor units Chassis MM-N028, MM-N042, MM-N056, MM-N080...
  • Page 40 Wiring diagrams Indoor units Built-In Slim Duct MM-SB028...
  • Page 41 Wiring diagrams Indoor units Low wall MM-S056, MM-SR056, MM-S080, MM-SR080...
  • Page 42 Wiring diagrams Indoor units 4-way cassette MM-U140, MM-U112, MM-U080, MM-U056...
  • Page 43 Wiring diagrams Indoor units 2-way cassette MM-TU028, MM-TU042, MM-TU056...
  • Page 44 Refrigerant piping systematic drawings Inverter unit (10 HP, 8 HP) Heat pump Model MM-A0280HT, MM-A0224HT Propeller fan Fan motor Sensor Condenser (TE1) Pulse motor valve A (PMV 1 + PMV 2) Condenser Sensor (TS) 4-way valve Solenoid valve Pulse motor valve B (SV2) (Cooling bypass) (PMV 3)
  • Page 45 Refrigerant piping systematic drawings Fixed-speed unit (10 HP, 8 HP) Heat pump Model MM-A0280HX, MM-A0224HX Propeller fan Fan motor Pulse motor valve A Sensor Condenser (PMV 1 + (TE1) PMV 2) Condenser Capillary Sensor (TS) 4-way valve Pulse motor valve B Solenoid valve (Cooling bypass) (SV2)
  • Page 46 Refrigerant piping systematic drawings Fixed-speed unit (6 HP) Heat pump Model MM-A0160HX, MM-A0160CX Propeller fan Fan motor Condenser Pulse motor valve A (PMV 1) Condenser Sensor (TE1) Capillary Sensor (TS) 4-way valve Solenoid valve (SV2) Pulse motor valve (Cooling bypass) (PMVB) High pressure sensor...
  • Page 47 Refrigerant piping systematic drawings Inverter unit (10 HP, 8 HP) Cooling only Model MM-A0280CT, MM-A0224CT Propeller fan Fan motor Condenser Sensor Check (TE1) valve Condenser Sensor (TS) Solenoid valve Pulse motor valve (SV2) (Cooling bypass) (PMVB) High pressure sensor Solenoid Check joint (Pd) valve Sensor...
  • Page 48 Refrigerant piping systematic drawings Fixed-speed unit (10 HP, 8 HP) Cooling only Model MM-A0280CX, MM-A0224CX Propeller fan Fan motor Sensor Condenser Check (TE1) valve Condenser Capillary Sensor (TS) Pulse motor valve Solenoid valve (Cooling bypass) (SV2) (PMVB) High pressure sensor Solenoid valve Check joint (Pd)
  • Page 49 Combined refrigerant piping systematic drawings Normal operation - Heat pump system (Cooling mode)
  • Page 50 Combined refrigerant piping systematic drawings Emergency operation when inverter unit has failed Heat pump system (Master unit back-up operation: cooling mode)
  • Page 51 Combined refrigerant piping systematic drawings Emergency operation when fixed-speed unit has failed Heat pump system (Cooling mode)
  • Page 52 Combined refrigerant piping systematic drawings Recovery of refrigerant in failed outdoor unit Heat pump system (Normal outdoor unit refrigerant recovery)
  • Page 53 Refrigeration cycle schematic Indoor units Heat exchanger Distributor strainer Check PMV (D) joint Liquid Capillary sensor sensor Pressure tube (B) sensor Strainer Strainer Refrigerant pipe Refrigerant pipe (liquid) (A) (gas) (C) (A) ∅ ∅ ∅ ∅ ∅ mm Capillary (B) Inner ∅ ∅ ∅ ∅ ∅ mm (C) ∅...

  • Page 54: Outdoor Unit

    Outline of control Outdoor unit Operation start/Operation end The compressor, solenoid valve, pulse motor valve (PMV), outdoor fan, etc. are controlled by a command from the indoor controller. The slave outdoor unit starts/stops by a command from the master outdoor unit. Operation stop Operation start Operation signal from indoor...
  • Page 55 Outline of control Outdoor unit Item Operation explanation and applied data, etc. Remarks 1a. Electronic (1) PMV A control (PMV x 2) expansion The PMV (pulse motor valve) is controlled between 100 ~ 1000 valve (PMV) pulses during the operation. control The PMV is fully open during the cooling operation (PMV A1 = 500 pulses, PMV A2 = 500 pulses).
  • Page 56 Outline of control Outdoor unit Item Operation explanation and applied data, etc. Remarks 2b. Outdoor fan (1) Heating fan control control The number of waves is controlled according to the TE sensor temperature. If TE >20°C is constantly detected for 5 minutes, the operation will automatically shut down.
  • Page 57 Outline of control Outdoor unit Item Operation explanation and applied data, etc. Remarks 5. Oil equalizing This control is to prevent oil reduction in the compressor between the outdoor units. This control control is classified into two functions, one is an individual control in normal operation which is performed by the master outdoor unit, and the other is a system control which is executed when shortage has been detected in the oil level detection control.
  • Page 58 Outline of control Outdoor unit Item Operation explanation and applied data, etc. Remarks 7. Release valve (1) SV2 gas balance control control This control is executed to balance the gas by opening SV2 while the compressor is off, in order to decrease the activation load in the next compressor-ON time. This control is individually executed by the master outdoor unit and each slave outdoor unit.
  • Page 59 Outline of control Outdoor units Item Operation explanation and applied data, etc. Remarks 9. Compressor This control is to prevent stagnation of refrigerant in the compressor case by a supply of winding current to heat the windings while the inverter compressor is off. This control is executed heating control by the inverter outdoor unit only.
  • Page 60 Outline of control Outdoor units Item Operation explanation and applied data, etc. Remarks 11. IPDU (Inverter) IPDU controls the inverter compressor by command frequency, frequency up/down control speed, and current release control value from the interface PC board. The main controls of IPDU control PC board are described below.
  • Page 61 Outline of control Outdoor units Item Operation explanation and applied data, etc. Remarks 12. Defrost (1) Conditions for starting the defrost operation • If the conditions are control Calculate the operation time when the TE sensor detects below – 1°C during satisfied, all the (reverse heat mode.
  • Page 62 Outline of control Outdoor units Item Operation explanation and applied data, etc. Remarks 12. Defrost For the slave outdoor units control • The compressors 1 and 2 are kept on. Should they be off they will be (reverse switched on. defrost •...
  • Page 63 Outline of control Outdoor units Other cautions (1) Cooling operation in low ambient temperature When low pressure is reduced, the freeze prevention control by the indoor unit TC sensor may decrease the frequency. When low pressure is reduced, the cooling capacity control may decrease the frequency. When discharge temp.
  • Page 64 Outline of control Indoor units Item Operation explanation and applied data, etc. Remarks 1. Power source (1) Automatic remote controller function set-up • Operation mode is reset Based upon the result of selecting indoor unit model, set-up and display range of the range Air volume remote controller.
  • Page 65 Outline of control Indoor units Item Operation explanation and applied data, etc. Remarks 6. Air volume (1) By the command from the remote controller or the central controller, “HIGH”, “MED.”, • During stop control “LOW”, or “AUTO” operation is permissible. operation, control to (2) While air volume is in AUTO mode, the air volume is changed according to the prevent cold draft is...
  • Page 66 Outline of control Indoor units Item Operation explanation and applied data, etc. Remarks 11. Auto louvre (1) When the louvre signal has been received from the remote controller or the central control controller, the auto turn louvre operates if the indoor fan is operating. 12.
  • Page 67 Self diagnostic display information Outdoor units System information data display (Displayed on the inverter unit only) The combination of rotary switches SW01, SW02 and SW03 display the following info: SW01, 02, 03: Rotary switch SW04, 05: Push switch SW08: Dip switch SW03 SW02 SW01...
  • Page 68 Self diagnostic display information Outdoor units Outdoor unit information data display (Displayed on each outdoor unit) SW03 SW02 SW01 Displayed content Check code A [U1] to [U5]: Outdoor unit number (1 = Inverter) B [—]: Normal time (No error) A check code is displayed in abnormality <SW04>: Push function: Only fan of unit in which an error occurred operates.
  • Page 69 Self diagnostic display information Outdoor units (3) Outdoor cycle data display (Displayed on each outdoor unit) SW03 SW02 SW01 Displayed content Pressure sensor Pd Pressure sensor data is displayed with (MPaG). Pressure sensor Ps Temperature sensor TD1 Temperature sensor data is displayed with (°C). Symbol •...
  • Page 70 Self diagnostic display information Outdoor units (5) Outdoor unit information data display (Displayed on inverter unit only) SW03 SW02 SW01 Displayed content 1 to 3 1 to 16 Indoor communication/ A [01] to [48]: Indoor address number receive status B [1]: Receiving, [- -]: No connection Indoor check code A [01] to [48]: Indoor address number B [—]: No error, a check code is displayed when an error occurs...
  • Page 71 Control circuit configuration Indoor units (1) LED display on indoor PC board – MCC-1361-01 General type Part No. Colour Displayed content Details Orange Serial receive Flashes synchronized with the receive signal to the standard remote controller. Green Serial send Flashes synchronized with the send signal from the standard remote controller.
  • Page 72 Control circuit configuration Indoor units (2) Display on remote controller In the following conditions, “STANDBY” is displayed on the remote controller. “STANDBY” display Fan operation is available, but PMV of the indoor unit is not permissible. (Refrigerant does not flow.) Indoor unit over capacity When the total HP of the connected indoor units exceeds 1.35 times of outdoor HP, the indoor unit will display “STANDBY”...
  • Page 73 Control circuit configuration Indoor units (4) Switch positions at shipment from the factory Switch No. Function Description Position at shipment from factory SW01 Indoor unit No. Group operation control set-up Set-up 1: Master unit 2 to 16: Slave units SW02 Network address set-up Address set-up by remote controller is unavailable.
  • Page 74 Control circuit configuration Indoor units (5) Contents of switch set-up Network address set-up table by DIP switch (SW02) • After turning off the power source, set 7 of DIP switch (SW02) to ON. Address set-up from the remote controller becomes unavailable. Address No.
  • Page 75 Control circuit configuration Indoor units (6) Service PC board selection corresponded table MCC-1361-01 The indoor control PC board can correspond to multiple models. When replacing MCC-1361-01 PC board assembly, set DIP switch, rotary switch, and jumper according to the following description. PCB label Model MM-U140 MM-U112, MM-U080, MM-U056, MM-TU056, MM-TU042, MM-TU028...
  • Page 76 Troubleshooting Remote controller check display Main remote controller Operating and reading the check display Push the CHECK button, and the identification number of the faulty indoor unit is shown in the Temperature Set-up section of the display – and the check code is shown in the TIME section of the display. If the air filter cleaning sign is displayed, the number of indoor units with a filter problem is indicated, followed by the check code.
  • Page 77 Troubleshooting Remote controller check display 7 segment display Hexadecimal notation Decimal notation Filter data Example: A Filter signal is sent from No. 1 and No. 15 units under grouping operation. Check data Unit No. Check code detected at first Check code detected at last Example: Room Temp.
  • Page 78 Troubleshooting Self diagnostic function Liquid crystal remote controller CHECK code STANDBY display Over capacity Abnormal phase connection Fixed- Indoor drain overflow alarm speed outdoor Inverter outdoor unit unit Remote controller Inverter serial signal short circuit “04” Remote Remote controller serial signal circuit “99” (High level refrigerant leak if RBC-RD2-PE fitted) controller Four-way valve alarm...

  • Page 79: Diagnostic Procedure For Check Code

    Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Connection error of communication cable between [04] inverter and interface PC boards Inverter serial signal short circuit 2. Defective interface PC board 3. Defective inverter PC board 4. Noise from outside 5.
  • Page 80 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Float switch disconnection [0b] 2. Drain pump operation error Drain pump fault 3. Drain hose blockage Check connection of connector CN11 Is drain pump connected? (Drain pump: Indoor main, PC board (MCC-1361-01)) Is circuit wiring Check and modify wiring circuit.
  • Page 81 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Fan motor circuit connection error [11] 2. Capacitor error Indoor fan motor short circuit alarm 3. Fan motor error 4. Defective indoor PC board Does indoor fan operate for a short period after resetting and resuming? Is there a connection error of...
  • Page 82 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Outdoor unit power source error [14] 2. Wiring error on inverter PC board G-Tr short circuit protective operation alarm 3. AC fuse disconnection (Gate Transistor) 4. Inverter compressor error 5.
  • Page 83 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Defective wiring of inverter PC board [17] 2. Defective inverter PC board Current detection circuit alarm Is wiring connector on inverter Modify connection of wiring PC board normal? Check inverter PC board. Check code Operation cause [18]...
  • Page 84 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Outdoor unit power source error [1d] 2. Inverter compressor circuit system error Compressor error alarm 3. Inverter compressor error 4. Inverter compressor refrigerant stagnation 5. Defective inverter PC board Is the power source voltage of the Confirm the power source supply.
  • Page 85 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Outdoor unit power source error [1F] 2. Inverter compressor circuit system error Compressor break down 3. Inverter PC board error Is the power source voltage of Confirm the power source supply. the outdoor unit normal? Does the voltage reduction occur when the fixed-speed compressor...
  • Page 86 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Inverter high pressure SW error [21] 2. Inverter IOL (Inner Overload) operation Inverter high pressure SW 3. Service valve closed circuit alarm 4. Outdoor fan, capacitor error 5. Indoor/Outdoor PMV blockage 6.
  • Page 87 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Pd sensor error [22] 2. Service valve closed High pressure protective operation 3. Outdoor fan, capacitor error 4. Indoor/Outdoor PMV blockage 5. Outdoor heat exchanger blockage 6. SV2 circuit blockage 7.
  • Page 88 Troubleshooting Diagnostic procedure for check code Check code Operation cause [87] Missing phase of outdoor unit power source Missing phase A phase of the outdoor unit power source is missing. Modify the power source wiring. Check code Operation cause 1. No. of connected indoor units/connected over [89] capacity Indoor over capacity...
  • Page 89 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Outdoor unit system set-up [8d] 2. Outdoor unit power source Reduction in the No. of 3. Connection error of communication cable between connected outdoor units outdoor units 4. Connection error of BUS communication 5.
  • Page 90 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Address set-up of outdoor unit was duplicated [8F] 2. Interface PC board error Server outdoor address incorrect Turn off SW09 bit 1 on interface PC Is SW09 bit 1 of master outdoor board of master outdoor unit.
  • Page 91 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Connection error of communication cable (PQ) [95] between indoor and outdoor units Indoor/outdoor comunication short circuit 2. Connection error of connector for indoor communication, PC board error 3. Connection error of connector for outdoor communication, interface PC board error Is there a miswiring or Check communication cable.
  • Page 92 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Connection error of communication cable (PQ) [96] between indoor and outdoor units No. of connected indoor units over capacity 2. Abnormal No. of connected indoor units 3. Wiring connection error of central management remote controller.
  • Page 93 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Connection error of communication cable (PQ) [97] between indoor and outdoor units Central management communication 2. Connection error of (XY) for outdoor units short circuit 3. Power source system error of the central controller and indoor unit 4.
  • Page 94 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Miswiring of XY communication cables [98] 2. Duplicated network addresses Central management address set-up fault 3. Indoor PC board error, central controller error Is the wiring connection of Check connection of wiring. communication cables to X,Y normal? Is [98] displayed only on the central controller?
  • Page 95 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Remote controller circuit connection error [99] 2. Duplicated indoor No.1 units Remote controller serial signal circuit alarm 3. Remote controller error 4. Indoor PC board error Are A, B, C internal wires normal? Check connection of wiring.
  • Page 96 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Miswiring/Mispiping of indoor/outdoor units [9A] 2. Insufficient refrigerant Indoor unit miswiring/misconnection 3. Blockage in pipe run Stop the outdoor unit for 20 Was the outdoor unit stopped for minutes or more, and then check 20 minutes or more before miswiring again.
  • Page 97 Troubleshooting Diagnostic procedure for check code Check code Operation cause [A0] TD1 sensor open/short Discharge temp. sensor (TD1) short circuit Open/short of TD1 sensor was detected. Check connector (TD1 sensor: CN502) and characteristics of sensor resistance value. When sensor is normal, replace interface PC board of the outdoor unit. Check code Operation cause [A1]...
  • Page 98 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Outdoor unit service valve closed [A6] 2. Cooling bypass PMV error Discharge temperature TD1 alarm 3. TD sensor error 4. Insufficient refrigerant, blockage in pipe 5. Blockage of PMV assembly on the liquid line Are the gas pipe and liquid pipe service valves of the outdoor unit Open valves fully.
  • Page 99 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Outdoor unit service valve closed [A7] 2. Blockage PMV assembly on the liquid line Suction temperature (TS) alarm 3. TS sensor error 4. Insufficient refrigerant, blockage in pipe Are the gas pipe and liquid pipe Open valves fully.
  • Page 100 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Connector misconnection of Pd/Ps sensors [Ab] 2. Pd/Ps sensor error Pressure sensor (Pd/Ps) miswiring 3. Compressor inverse operation, compressor error Check connection. Is the pipe connection position of Pd sensor: CN501 Pd sensor/Ps sensor correct ? Ps sensor: CN500 Are the output voltage...
  • Page 101 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Outdoor unit service valve closed [AE] 2. Cooling bypass PMV error Low Hz time discharge temp. (TD1) alarm 3. TD1 sensor error 4. Insufficient refrigerant, blockage in pipe 5. Blockage of indoor filter 6.
  • Page 102 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Ps sensor error [b4] 2. Ps sensor connection error Low pressure sensor (Ps) short circuit 3. Compressor error Check connection. Are Pd sensor/Ps sensor Pd sensor: CN501 correctly connected ? Ps sensor: CN500 Are the output voltage characteristics of Ps sensor...
  • Page 103 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Outdoor unit service valve closed [bb] 2. Cooling bypass PMV error Discharge temperature (TD2) alarm 3. TD sensor error 4. Insufficient refrigerant, blockage in pipe 5. Blockage of PMV assembly on the liquid line Are the gas pipe and liquid pipe service valves of the outdoor unit Open valves fully.
  • Page 104 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Mg-SW contact deposit protective operation [bd] 2. TD sensor error Mg-SW protective operation 3. Pd sensor/Ps sensor error 4. Insufficient refrigerant, blockage in pipe. Turn off the power supply, and Is the Mg-SW contact faulty ? replace Mg-SW.
  • Page 105 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Ps sensor error [bE] 2. Service valve closed Low pressure (Ps) protective operation 3. Indoor fan capacitor error 4. Indoor/outdoor PMV blockage 5. Indoor heat exchanger blockage 6. SV2 circuit 7.
  • Page 106 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. No. of connected inverter outdoor units [d1] 2. Incorrect set-up of master outdoor unit Master outdoor unit set-up alarm 3. Defective outdoor interface PC board Set only one inverter outdoor unit Are there multiple inverter per system.
  • Page 107 Troubleshooting Diagnostic procedure for check code Check code Operation cause [d2] Defective slave outdoor unit Slave outdoor unit alarm An error occurs in the slave outdoor unit. Confirm the check code of the slave unit, and check it according to the diagnostic procedure for each check code.
  • Page 108 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Balancing pipe valve (all outdoor units in the [d7] connecting line) closed Low oil level detection 2. Compressor case oil removal valve closed 3. Miswiring of TK1 sensor/TK2 sensor 4.
  • Page 109 Troubleshooting Diagnostic procedure for check code ( *1) 2-way valve leakage/blockage check procedure 7 segment display After resetting the power supply, start a trial operation. When operation has started “OL” “- - “ Set SW01/SW02/SW03 on interface PC board to During detection of oil level “OL”...
  • Page 110 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. TK2 sensor out of place, miswiring, resistance [d9] value characteristics error Oil temperature (TK2) detection alarm 2. Oil tank peripheral circuit error Check valve leakage Capillary blockage Strainer blockage Modify sensor mounting.
  • Page 111 Troubleshooting Diagnostic procedure for check code ( *1) Oil tank peripheral circuit leakage/blockage check procedure After resetting the power supply, start a trial operation. Set SW01/SW02/SW03 on interface PC board to 1/16/1, respectively. Check the 7 segment display of the interface PC board. 7 segment display When operation has started “OL”...
  • Page 112 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Power supply failure [dA] 2. Outdoor fan error Abnormal overheat of heat sink 3. Heat sink installation failure 4. Blockage of heat sink cooling duct 5. Defective inverter PC board Is power supply voltage normal ? Check power supply.
  • Page 113 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Blockage in SV3C valve [db] 2. Blockage in SV3C valve circuit SV3C valve blockage detection Modify miswiring. TK1 sensor: CN516 Is there miswiring of TK2 sensor: CN515 TK1/TK2/TK3 sensor ? TK3 sensor: CN507 Is the resistance value Sensor error.
  • Page 114 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. SV3C valve leakage [dC] 2. TK1 sensor resistance value characteristics error SV3C valve leakage detection 3. Outdoor unit operation in high external temperatures Is the resistance value Sensor error. characteristics of TK1 sensor normal ? Is it an operation in high...
  • Page 115 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Leakage of PMV assembly on the liquid line [dd] 2. Pd sensor/Ps sensor error Outdoor PMV refrigerant leakage detection 3. Blockage in SV2 valve circuit 4. Blockage in SV3B valve circuit 5.
  • Page 116 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Indoor unit in automatic addressing mode [dE] 2. Indoor unit PC board set-up error Indoor address undefined 3. Defective indoor unit PC board 4. Communication noise interference While this check code is displayed, wait for a moment. When the address is defined, the operation is automatically reset.
  • Page 117 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Fixed-speed compressor high pressure SW error [E1] 2. Fixed-speed compressor IOL operation Fixed-speed (1) high pressure 3. Service valve closed SW system alarm 4. Outdoor fan, capacitor error [F0] 5.
  • Page 118 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Inverter IOL operation [E5] 2. Service valve closed Inverter IOL short circuit 3. Cooling bypass PMV error 4. Miswiring of communication between indoor and outdoor units Is the IOL circuit normal ? 1.
  • Page 119 Troubleshooting Diagnostic procedure for check code Check code Operation cause 1. Power supply error [E6] 2. Fixed-speed compressor IOL operation Fixed-speed (1) IOL, OCR alarm 3. Service valve closed [F1] 4. Blockage in indoor/outdoor PMV Fixed-speed (2) IOL, OCR alarm 5.
  • Page 120 Troubleshooting Diagnostic procedure for check code Segment display function Outdoor unit 7 segment display (Interface PC board) A 7 segment LED to check the operation status is provided on the interface control PC board. The display contents can be selected by combining the set-up numbers of the rotary switches (SW01, SW02, and SW03) on the PC board. 7 segment 7 segment display A...
  • Page 121 Troubleshooting Description of functional parts Functional part Functional outline Solenoid valve 1. SV3A 1) Accumulates oil from the compressor to the oil tank when the valve is shut. (CN312) 2) Supplies the gathered oil to the balancing pipe during ON time when pressure is applied to inside of the oil tank. 3) Supplies oil directly to the balancing pipe when the valve is open and pressure is applied.

  • Page 122: Emergency Operation

    Back-up operation Emergency operation When one compressor has failed (back-up set-up of compressor) Outline When one of two compressors installed in the outdoor unit fails, take the following action if emergency operation by another normal compressor is possible. In the case of single compressor installed unit (6HP), back-up operation by one compressor is unavailable. In •...
  • Page 123 Back-up operation Emergency operation Fault in fixed-speed unit (Back-up of slave outdoor unit) Outline When a fixed-speed unit connected to the system fails, firstly perform emergency process according to the following work procedure, and then perform emergency operation on the inverter unit and other fixed-speed units. Work procedure (1) First, turn off the power source of all the outdoor units which are connected to the system.
  • Page 124 Back-up operation Emergency operation Fault of inverter unit (back-up set-up of master outdoor unit) Outline When an inverter unit fails, firstly perform emergency process according to the following work procedure, and then perform emergency operation by a fixed-speed unit only. Work procedure (1) First, turn off the power source of all the outdoor units which are connected to the system.
  • Page 125 Back-up operation Emergency operation Outdoor back-up set-up in cooling season (simple setting method) Outline When either inverter unit or fixed-speed unit fails during cooling season, this function is used to perform emergency operation quickly. When the interface or electric circuit system fails, emergency operation by this set-up cannot be performed. In this case, refer to “When outdoor unit has failed”...
  • Page 126 Forced function of oil level detection Outdoor unit The oil level detection control can be forcibly implemented by a switch on the interface PC board of the outdoor unit. When an error in the oil tank circuit occurs and there is no cause such as sensor error, connection error, sensor location error, valve close operation error, etc., perform the following checks.

  • Page 127: Leak Test

    Refrigerant pipe installation Leak test [1] Leak test pressure For Multi Modular System air conditioner systems: 3.0MPa (30kg/cm [2] Test method Supply oxygen free nitrogen (OFN) gas to the system as described. • The gas-side, liquid-side and balance valves must all be fully closed. Note that there is a possibility that the nitrogen gas could become mixed into the outdoor unit cycle.
  • Page 128 Refrigerant pipe installation Vacuuming (1) After the airtight test, discharge nitrogen gas. Connect a gauge manifold to the service ports at liquid, gas and balance sides, and connect a vacuum pump as shown in the following figure. Be sure to perform vacuuming at liquid, gas, and balance sides. High pressure pressure...
  • Page 129 Refrigerant pipe installation Charging the system with additional refrigerant Calculating the amount of additional refrigerant required Refrigerant in the system when shipped from the factory Outdoor unit model MM-A0224HT MM-A0280HT MM-A0160HX MM-A0224HX MM-A0280HX MM-A0224CT MM-A0280CT MM-A0160CX MM-A0224CX MM-A0280CX 15.5 17.0 Charging amount (kg) When the system is charged with refrigerant at the factory, the amount of refrigerant needed for the pipes at the site is not included.
  • Page 130 Refrigerant pipe installation Additional refrigerant charging method (1) Loosely connect the refrigerant cylinder hose to the gauge manifold, then open the source valve V on the cylinder, purge the air in the hose, and then tighten the hose. (2) As shown in the diagram below, turn the refrigerant cylinder upside down, open the valve V on the gauge manifold, and then charge the liquid side pipe with refrigerant in the liquid state.

  • Page 131: Additional Refrigerant Charging

    Refrigerant pipe installation Additional refrigerant charging Additional refrigerant charging amount reference chart Unit (kg) Actual Pipe size (liquid pipe) (mm) Actual Pipe size (liquid pipe) (mm) piping piping ∅ 6.4 ∅ 9.5 ∅ 12.7 ∅ 15.9 ∅ 19.0 ∅ 22.2 ∅...

  • Page 132: Procedure And Summary Of Trial Operation

    Trial operation Procedure and summary of trial operation Outline of procedure For a trial operation, follow the procedure below: Check the basic items, especially installation work. Ensure you write the Check before trial operation check lists 1 and 2 Implementation of trial operation check Implement check in sequence according to each flowchart of trial operation procedure.
  • Page 133 Trial operation Procedure and summary of trial operation Trial operation check After “Check before trial operation”, implement a trial operation in the following procedure. (Turn the power switch on and the crank case heater for 12 hours before a trial operation will be completed.) Check the trial operation for each indoor unit.
  • Page 134 Trial operation Procedure and summary of trial operation (3) Cooling operation check Start Trial operation from outdoor This air conditioner is attached with Set the operation mode to COOL by unit is also available. reactivation delay timer, so the operation pushing the operation switch for 5 restarts 2 minutes 30 seconds after it seconds or more, and then check “L”...
  • Page 135 Trial operation Procedure and summary of trial operation NOTE 1: Criteria for indoor air inlet/outlet temperature difference After operation for a minimum of 30 minutes in “COOL” mode, if temp. difference between the air inlet and air outlet of the indoor unit is 8°C or more – operation is normal. (In Max.
  • Page 136 Trial operation Automatic address Automatic address (Between outdoor unit and indoor unit) When turning the power on for the first time after the air conditioner has been installed, automatic address starts. Usually, the automatic address takes time approx. 3 to 5 minutes after the power is on. However, in some cases, it may take Max.

  • Page 137: Service Support Function

    Trial operation Service support function Check function for connection of refrigerant pipe and control transmission line This function is provided to check misconnection of the refrigerant piping and the control transmission line between indoor and outdoor units by the switch on interface PC board of the inverter type outdoor unit. However, be sure to check items described below before implementing this check function.
  • Page 138 Trial operation Service support function Function to start/stop (ON/OFF) indoor unit from outdoor unit A function to start/stop the following indoor units by switch operation on the interface PC board is provided. Function Outline Clear set-up Trial cooling The modes of all the connected indoor units are [Set-up] operation collectively changed to trial cooling operation modes.
  • Page 139 Trial operation Service support function (1) Trial cooling operation function This function is to change the modes of all the indoor units connected to an identical system collectively to trial cooling operation modes using the switch on interface PC board of the inverter type outdoor unit. Operation procedure Power ON Set SW01 on the interface PC board of the inverter outdoor unit to 2 ,...
  • Page 140 Trial operation Service support function (2) Collective start/stop (ON/OFF) function This function is to start/stop (ON/OFF) the indoor units connected to an identical system collectively using the switch on the interface PC board of the inverter outdoor unit. Operation procedure Power ON If an alarm has been already displayed as SW01 1, SW02 1, SW03 1, return the status to normal according...
  • Page 141 Trial operation Service support function (3) Individual start/stop (ON/OFF) function This function is to start/stop (ON/OFF) the indoor units connected to an identical system individually using the switch on interface PC board of the inverter outdoor unit. Set SW01 to “16”, and SW02 and SW03 to the indoor unit to be operated. (See * in the following table) The set indoor units to operate alone.
  • Page 142 Trial operation Service support function Alarm clear function 1) Clearing of check code on remote controller This function releases ALL STOP lock status of the outdoor units (whole system) connected with the indoor unit, and restarts the operation. ( Restarts alarm detection.) CHECK CHECK button...
  • Page 143 Trial operation Service support function 3) Clearing of check code alarm by resetting power source Be sure to reset both power sources of outdoor/indoor units. Both power OFF Turn on power of the outdoor unit first, then indoor units. NOTE: Even if the lock alarm related to the indoor unit is cleared by resetting power source of the outdoor unit, ALL STOP lock status of whole system is not released.
  • Page 144 Trial operation Service support function Pulse Motor Valve (PMV) manual “FULL OPEN” function in the indoor unit With switch operation on interface PC board of the inverter outdoor unit, this function allows manual opening of the Pulse Motor Valve (PMV) in all the indoor units for 2 minutes. Usually, turning on power of the indoor unit once fully closes the PMV of the indoor unit.
  • Page 145 Replacing the compressor Refrigerant recovery method Refrigerant Recovery Method for a Failed Outdoor Unit When multiple outdoor units are connected in a system, the refrigerant can be recovered from the outdoor unit to be repaired by performing the reclaim operation to a functional outdoor unit. The refrigerant recovery ratio changes according to the outside temp., etc.
  • Page 146 Replacing the compressor Refrigerant recovery method A-3) 10 minutes after the system has been activated, close the gas pipe and balance pipe service valves of the failed outdoor unit fully. A-4) Turn off the power source for all the outdoor units. A-5) Recover the remaining gas in the failed outdoor unit using a refrigerant recovery device.
  • Page 147 Replacing the compressor Refrigerant recovery method Explanatory diagram: Modular multi service valve Figure: Open/close direction of service valve Valve Valve closed open Figure: Position of service valve Balancing pipe service valve Liquid pipe service valve Gas pipe service valve...
  • Page 148 Replacing the compressor Compressor replacement procedure Start Was refrigerant recovery Recover refrigerant according to page 145 work executed when Refrigerant Recovery Method when replacing replacing the compressor ? compressor or by a refrigerant recovery device. Turn off power of the failed unit. Remove parts.

  • Page 149: Compressor Replacement Procedure

    Replacing the compressor Compressor replacement procedure After recovery of refrigerant is complete, turn off the power source, and replace the compressor according to the following method. [In case of removal of the compressor from the front side] Outdoor units (Inverter and fixed-speed units) MM-A0280HT, MM-A0224HT, MM-A0280HX, MM-A0224HX MM-A0280CT, MM-A0224CT, MM-A0280CX, MM-A0224CX Removing of parts...
  • Page 150 Replacing the compressor Compressor replacement procedure Installation • Install the compressor in the reverse order of removing the compressor. NOTE: 4-way valve Check joint After installation, fully open the valve at bottom side of the compressor, (heat pump only) using a hexagonal wrench. Vacuuming •...
  • Page 151 Replacing the compressor Compressor replacement procedure NOTE: Weight of the compressor is approx. 45kg. • Remove the nuts fixing the compressor. • Remove the compressor. Installation • Install the compressor in the reverse order of removing the compressor. NOTE: After installation, fully open the valve at bottom side of the compressor, using a hexagonal wrench. Vacuuming •...
  • Page 152 Replacing the compressor Compressor replacement procedure Removing of compressor • Remove two discharge pipes, suction pipe, upper oil return piping, oil tank piping, and case bypass piping. (Same case for pulling out from the front side) NOTE: Take great care when removing the pipes with a brazing torch – if oil is remaining in the pipe, a flame may be emitted at the moment when the flux melts.
  • Page 153 Replacing the compressor Compressor replacement procedure Outdoor unit MM-A0160HX MM-A0160CX Removing of parts • Remove the front painted panel. • Remove electrical parts cover. • Disconnect all wires connected to the electric parts box, temp. sensor, pressure sensor, complete, 2-way valve, PMV, etc..
  • Page 154 Replacing the compressor Compressor replacement procedure Installation • Install the compressor in the reverse order of removing of compressor. NOTE: After installation, fully open the valve at bottom side of the compressor, using a hexagonal wrench. Vacuuming • Connect the vacuum pump to the check joint of the discharge and suction pipes, and operate the vacuum pump. •...

  • Page 155: Replacing The Interface Pc Board

    Replacing the interface PC board Interface PC board replacement procedure How to replace the interface PC board - MCC-1343-03 The service interface PC board is common to all MMS outdoor models. Replace the PC board according to the following procedure: (1) Turn off the power supply of the outdoor unit.
  • Page 156 Exploded views and service parts Outdoor units MM-A0280HT, MMA0280HX, MM-A0280CT, MMA0280CX, MM-A0224HT, MMA0224HX, MM-A0224CT, MMA0224CX...
  • Page 157 Exploded views and service parts Outdoor units MM-A0280HT, MM-A0280CT, MM-A0224HT, MM-A0224CT, MM-A0280HX, MM-A0280CX, MM-A0224HX, MM-A0224CX Ref. Part No. Description MODEL (MM-A) 0280HT 0280CT O224HT 0224CT 0280HX 0280CX 0224HX 0224CX 43A00020 PLATE SIDE (Right) 43A00021 PLATE SIDE (Left) 43A00022 AIR IN CABINET (Front) 43A00023 AIR IN CABINET (Back) 43A00024...
  • Page 158 Exploded views and service parts Outdoor units MM-A0160HX, MM-A0160CX 28/29 45 26 35 34 33 12/13 14/15 16/17 24/25...
  • Page 159 Exploded views and service parts Outdoor units MM-A0160HX, MM-A0160CX Ref. Part No. Description MODEL MM-A0160HX, MM-A0160CX 43A00020 PLATE SIDE (Right) 43A00021 PLATE SIDE (Left) 43A00022 AIR IN CABINET (Front) 43A00023 AIR IN CABINET (Back) 43A00024 CABINET DOWN (Front) 43A00025 CABINET DOWN (Back) 43A00026 SERVICE PANEL 43A00027...
  • Page 160 Exploded views and service parts Outdoor unit electrical parts assembly MM-A0280HT, MM-A0280CT MM-A0224HT, MM-A0224CT 30/31 MM-A0280HX, MM-A0280CX MM-A0160HX, MM-A0160CX MM-A0224HX, MM-A0224CX...
  • Page 161 Exploded views and service parts Outdoor unit electrical parts assembly MM-A0280HT, MM-A0280CT, MM-A0224HT, MM-A0224CT, MM-A0280HX, MM-A0280CX, MM-A0224HX, MM-A0224CX, MM-A0160HX, MM-A0160CX Ref. Part No. Description MODEL (MM-A) 0280 0224 0280 0224 0160 43A50012 TEMPERATURE SENSOR TS1 43A50013 TEMPERATURE SENSOR TE 43A50014 TEMPERATURE SENSOR TK3 43A52005 MAGNETIC CONTACTOR –...
  • Page 162 Exploded views and service parts Indoor units Built-In Duct – MM-B056, MM-B080, MM-B112, MM-B140 Ref. Part No. Description B065 B080 B112 B140 Ref. Part No. Description B065 B080 B112 B140 43120149 MULTI-BLADE FAN 43A60025 TERMINAL ‘ABC PQ E’ 43A21009 FAN MOTOR (60 W) 43A60012 TERMINAL ‘E L N’...
  • Page 163 Exploded views and service parts Indoor units Ceiling Type – MM-C042, MM-CR042, MM-C056, MM-CR056 MM-C080, MM-CR080, MM-C112, MM-CR112, MM-C140, MM-CR140 46/47 Ref. Part No. Description Ref. Part No Description 43107214 HINGE 43155101 MF CAPACITOR 43A50006 TEMP. SENSOR CLIP (TC) 43155138 MF CAPACITOR 43107216 SPRING 43A55001 MF CAPACITOR 43107223 SHAFT GRILLE –...
  • Page 164 Exploded views and service parts Indoor units High Wall – MM-K042, MM-KR042, MM-K056, MM-KR056, MM-K080, MM-KR080 Ref. Part No. Description K042 KR042 K056 KR056 K080 KR080 Ref. Part No. Description K042 KR042 K056 KR056 K080 KR080 01 43120135 CROSS FLOW FAN 16 43A09005 HORIZONTAL GRILLE 01 43120136 CROSS FLOW FAN...
  • Page 165 Exploded views and service parts Indoor units Chassis – MM-N028, MM-N042, MM-N056, MM-N080 Ref. Part No. Description N028 N042 N056 N080 Ref. Part No. Description N028 N042 N056 N080 43A21013 FAN MOTOR SMF-230-34-4H 43155138 MF CAPACITOR 43A21004 FAN MOTOR SMF-230-34-4E 43155120 MF CAPACITOR 43126127...
  • Page 166 Exploded views and service parts Indoor units Low Wall – MM-S056, MM-SR056, MM-S080, MM-SR080 44/45 Ref. Part No. Description S056 SR056 S080 SR080 Ref. Part No. Description S056 SR056 S080 SR080 43107214 HINGE 43A70007 HOSE ASSEMBLY 43A50006 TEMP. SENSOR CLIP (TC) 43A72002 DRAIN PAN ASSEMBLY 43107216...
  • Page 167 Exploded views and service parts Indoor units Built-In Slim Duct – MM-SB028 Ref. Part No. Description SB028 43A50006 TEMPERATURE SENSOR CLIP (TC) 43A20003 MULTI-BLADE FAN 43A22005 S FAN CASE 43A22006 S FAN CASE 43A21020 FAN MOTOR (34W) 43A44063 REFRIGERATION ASSEMBLY 43A50023 TEMP.
  • Page 168 Exploded views and service parts Indoor units 2-Way Cassette – MM-TU028, MM-TU042, MM-TU056 11/12 11/12 Ref. Part No. Description TU028 TU042 TU056 Ref. Part No. Description TU028 TU042 TU056 43A22007 BLOWER BASE ASSEMBLY 43A21014 FAN MOTOR (PAF-230-7-4) 43020288 CROSS FLOW FAN 43A50006 TEMPERATURE SENSOR TA 43A51002...
  • Page 169 Exploded views and service parts Indoor units 4-Way Cassette – MM-U056, MM-U080 Ref. Part No. Description U056 U080 Ref. Part No. Description U056 U080 43A70005 DRAIN HOSE ASSEMBLY 43A50022 TEMP. SENSOR - LIQUID TC2 43A44066 REFRIGERATION ASSEMBLY 43A50023 TEMP. SENSOR - AMBIENT TA 43A44067 REFRIGERATION ASSEMBLY 43A49010...
  • Page 170 Exploded views and service parts Indoor units 4-Way Cassette – MM-U112, MM-U140 Ref. Part No. Description U112 U140 Ref. Part No. Description U112 U140 43A70005 DRAIN HOSE ASSEMBLY 43A50022 TEMP. SENSOR - LIQUID TC2 43A44064 REFRIGERATION ASSEMBLY 43A50023 TEMP. SENSOR - AMBIENT TA 43A44065 REFRIGERATION ASSEMBLY 43A49010...
  • Page 171 Exploded views and service parts Indoor units Ceiling panel - RBC-U133PG(W)-PE Ref. Part No. Description 43080392 FILTER 43007108 PLATE CONNECT (Long) 43009504 ASM GRILLE OUT 43007107 BUSHING 43007109 PLATE CONNECT (Short) 43009503 GRILLE L-R 43007124 SUPPORT PLATE 43009499 ASM GRILLE OUT 43A26001 ASM MOTOR 43007125 SUPPORT PLATE...
  • Page 172 Exploded views and service parts Indoor units Ceiling panel - RBC-U264PG(W)-E, RBC-U264PGR(W)-E Ref. Part No. Description Model 43400658 PANEL RBC-U264PG(W)-E 43400001 PANEL (Remote) RBC-U264PGR(W)-E 43407072 GRILLE CATCH 43407085 JOINT KIT 43407091 CAM 43107249 MOTOR KIT ASSEMBLY 43409110 LOUVRE (Small) 43A09009 GRILLE - AIR INLET 43411007 CUSHION AIR OUTLET B 43411008 CUSHION AIR OUTLET C 43411009 CUSHION AIR OUTLET D...
  • Page 173 Exploded views and service parts Indoor units Ceiling panel - RBC-U464PG(W)-E, RBC-U464PGR(W)-E RBC-U464PGR(W)-E Ref. Part No. Description Model 43400662 PANEL RBC-U464PG(W)-E 43400003 PANEL (Remote) RBC-U464PGR(W)-E 43407072 GRILLE CATCH 43407076 GRILLE, LOUVRE M 43407085 JOINT KIT 43402091 CAM 43107249 MOTOR KIT ASSEMBLY 43409110 LOUVRE (Small) 43409114 LOUVRE (Large) 43A09010 GRILLE AIR INLET...
  • Page 176 MADE IN UK A90-0132 Revised June 2002...

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