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Mitsubishi Electric PUHY-HP200YNW-A Service Handbook
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Mitsubishi Electric PUHY-HP200YNW-A Service Handbook

Mitsubishi Electric PUHY-HP200YNW-A Service Handbook

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AIR CONDITIONER
2021
Service Handbook
Model
PUHY-HP200, HP250YNW-A
PUHY-HP400, HP500YSNW-A

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Summary of Contents for Mitsubishi Electric PUHY-HP200YNW-A

  • Page 1 AIR CONDITIONER 2021 Service Handbook Model PUHY-HP200, HP250YNW-A PUHY-HP400, HP500YSNW-A...
  • Page 2 Safety Precautions Please read the following safety precautions carefully before installing the unit to ensure safety. Indicates a risk of death or serious injury. Indicates a risk of serious injury or structural damage. Make sure that this manual is passed on to the end user to retain for future reference. Retain this manual for future reference.
  • Page 3 Always replace a fuse with one with the cor- To reduce the risk of injury from units falling rect current rating. The use of improperly or falling over, periodically check the instal- rated fuses or a substitution of fuses with lation base for damage.
  • Page 4 Any additional parts must be installed by Plastic bags pose suffocation hazard to the dealer or qualified personnel. Only use children. the parts specified by Mitsubishi Electric. Installation by unauthorized personnel or All drainage work should be performed by use of unauthorized parts or accessories...
  • Page 5 To reduce the risk of pipe damage, refriger- To prevent explosion, do not heat the unit ant leakage, and oxygen deprivation, use with refrigerant gas in the refrigerant circuit. pipes that meet the pipe thickness specifi- To reduce the risk of oxygen deprivation cations, which vary by the type of refriger- and gas poisoning, check for gas leakage ant used, pipe diameter, and pipe material.
  • Page 6 [6] Relocation and Repairs Relocation and Repairs To reduce the risk of refrigerant leakage, To reduce the risk of wire shorting, electric water leakage, injury, electric shock, and leak, electric shock, smoke, or fire, do not fire, units should only be moved or repaired perform maintenance work in the rain.
  • Page 7 Use refrigerant piping and couplings that To reduce the risk of both the breaker on the meet the applicable standards. For refriger- product side and the upstream breaker from ant pipes, use pipes made of phosphorus tripping and causing problems, split the deoxidized copper.

  • Page 8: Table Of Contents

    CONTENTS Chapter 1 Check Before Servicing Preparation for Piping Work........................1 Handling and Characteristics of Piping Materials, Refrigerant, and Refrigerant Oil ....... 3 Working with Refrigerant Piping......................8 Precautions for Wiring ......................... 12 Cautionary notes on installation environment and maintenance............ 14 Chapter 2 Restrictions System Configurations ..........................
  • Page 9 CONTENTS Chapter 8 Troubleshooting Based on Observed Symptoms MA Remote Controller Problems ......................1 ME remote Controller Problems ......................5 Refrigerant Control Problems ......................10 Checking Transmission Waveform and for Electrical Noise Interference ........15 Pressure Sensor Circuit Configuration and Troubleshooting Pressure Sensor Problems ..18 Troubleshooting Solenoid Valve Problems ..................

  • Page 10: Chapter 1 Check Before Servicing

    Chapter 1 Check Before Servicing Preparation for Piping Work ........................ 1 1-1-1 Read before Servicing ..........................1 1-1-2 Tool Preparation ............................. 2 Handling and Characteristics of Piping Materials, Refrigerant, and Refrigerant Oil...... 3 1-2-1 Piping Materials ............................3 1-2-2 Storage of Piping Materials........................5 1-2-3 Pipe Processing ............................
  • Page 11 GB_BS_01_K...

  • Page 12: Preparation For Piping Work

    [1-1 Preparation for Piping Work ] Preparation for Piping Work 1 Check Before Servicing 1-1-1 Read before Servicing 1. Check the type of refrigerant used in the system to be serviced. Refrigerant Type Multi air conditioner for building application CITY MULTI:R410A 2.

  • Page 13: Tool Preparation

    [1-1 Preparation for Piping Work ] 1-1-2 Tool Preparation Prepare the following tools and materials necessary for installing and servicing the unit. Tools for use with R410A (Adaptability of tools that are for use with R22 or R407C) 1. To be used exclusively with R410A (not to be used if used with R22 or R407C) Tools/Materials Notes Gauge Manifold...

  • Page 14: Handling And Characteristics Of Piping Materials, Refrigerant, And Refrigerant Oil

    [1-2 Handling and Characteristics of Piping Materials, Refrigerant, and Refrigerant Oil ] Handling and Characteristics of Piping Materials, Refrigerant, and Refrigerant Oil 1-2-1 Piping Materials Do not use the existing piping! 1. Copper pipe materials O-material (Annealed) Soft copper pipes (annealed copper pipes). They can easily be bent with hands. 1/2H-material (Drawn) Hard copper pipes (straight pipes).
  • Page 15 [1-2 Handling and Characteristics of Piping Materials, Refrigerant, and Refrigerant Oil ] 4. Thickness and refrigerant type indicated on the piping materials Ask the pipe manufacturer for the symbols indicated on the piping material for new refrigerant. 5. Flare processing (O-material (Annealed) and OL-material only) The flare processing dimensions for the pipes that are used in the R410A system are larger than those in the R22 system.

  • Page 16: Storage Of Piping Materials

    [1-2 Handling and Characteristics of Piping Materials, Refrigerant, and Refrigerant Oil ] 1-2-2 Storage of Piping Materials 1. Storage location Store the pipes to be used indoors. (Warehouse at site or owner's warehouse) If they are left outdoors, dust, dirt, or moisture may infiltrate and contaminate the pipe. 2.

  • Page 17: Differences In Refrigerant Properties

    [1-2 Handling and Characteristics of Piping Materials, Refrigerant, and Refrigerant Oil ] 1-2-4 Differences in Refrigerant Properties 1. Chemical property As with R22, R410A is low in toxicity and chemically stable nonflammable refrigerant. However, because the specific gravity of vapor refrigerant is greater than that of air, leaked refrigerant in a closed room will accumulate at the bottom of the room and may cause hypoxia.

  • Page 18: Refrigerant Oil

    [1-2 Handling and Characteristics of Piping Materials, Refrigerant, and Refrigerant Oil ] 1-2-5 Refrigerant Oil 1. Refrigerating machine oil in the HFC refrigerant system HFC type refrigerants use a refrigerating machine oil different from that used in the R22 system. Note that the ester oil used in the system has properties that are different from commercially available ester oil.

  • Page 19: Working With Refrigerant Piping

    [1-3 Working with Refrigerant Piping ] Working with Refrigerant Piping 1-3-1 Pipe Brazing Perform brazing with special care to keep foreign objects (such as oxide scale, copper powder, water, and dust) out of the refrig- erant system. Example: Inside the brazed connection Use of no inert gas during brazing Use of inert gas during brazing 1.

  • Page 20: Air Tightness Test

    [1-3 Working with Refrigerant Piping ] 1-3-2 Air Tightness Test Note that a refrigerant leak detector for R22 will not detect an R410A leak. Halide torch R22 leakage detector 1. Items to be strictly observed Pressurize the equipment with nitrogen up to the design pressure (4.15MPa[601psi]), and then judge the equipment's air tight- ness, taking temperature variations into account.

  • Page 21: Vacuum Drying

    [1-3 Working with Refrigerant Piping ] 1-3-3 Vacuum Drying (Photo1) 15010H (Photo2) 14010 Recommended vacuum gauge: ROBINAIR 14010 Thermistor Vacuum Gauge 1. Vacuum pump with a reverse-flow check valve (Photo1) To prevent the vacuum pump oil from flowing into the refrigerant circuit during power OFF or power failure, use a vacuum pump with a reverse-flow check valve.

  • Page 22: Refrigerant Charging

    [1-3 Working with Refrigerant Piping ] 1-3-4 Refrigerant Charging Cylinder with a siphon Cylinder without a siphon Cylin- Cylin- Cylinder color R410A is pink. Refrigerant charging in the liquid state Valve Valve liquid liquid 1. Reasons R410A is a pseudo-azeotropic HFC blend (boiling point R32=-52°C[-62°F], R125=-49°C[-52°F]) and can almost be handled the same way as a single refrigerant, such as R22.

  • Page 23: Precautions For Wiring

    [1-4 Precautions for Wiring ] Precautions for Wiring Control boxes house high-voltage and high-temperature electrical parts. They may still remain energized or hot after the power is turned off. When opening or closing the front cover of the control box, keep out of contact with the internal parts. Before inspecting the inside of the control box, turn off the power, leave the unit turned off for at least 10 minutes, and check that the voltage across pins 1 and 5 of connector RYPN has dropped to 20 VDC or less.
  • Page 24 [1-4 Precautions for Wiring ] 2) Check the wires are securely fastened to the screw terminals. Screw the screws straight down so as not to damage the screw threads. Hold the two round terminals back to back to ensure that the screw will screw down straight. After tightening the screw, mark a line through the screw head, washer, and terminals with a permanent marker.

  • Page 25: Cautionary Notes On Installation Environment And Maintenance

    [1-5 Cautionary notes on installation environment and maintenance ] Cautionary notes on installation environment and maintenance Heavy-salt resistant specification does not mean that corrosion and rust are 100% preventable. Take the following precautions for installation and maintenance of packaged air conditioners. 1) Install the units where they are not directly exposed to excessive amounts of splashes of ocean water or salty air as much as possible even when the units are heavy-salt resistant.

  • Page 26: Chapter 2 Restrictions

    Chapter 2 Restrictions System Configurations......................... 1 Types and Maximum Allowable Length of Cables................2 Switch Settings ............................. 3 M-NET Address Settings ........................4 2-4-1 Address Settings List ..........................4 2-4-2 Outdoor Unit Power Jumper Connector Connection................5 2-4-3 Outdoor Unit Centralized Controller Switch Setting ................5 2-4-4 Room Temperature Detection Position Selection ...................
  • Page 27 GB_BS_02_M...

  • Page 28: System Configurations

    [2-1 System Configurations ] System Configurations 2 Restrictions 1. Table of compatible indoor units The table below summarizes the types of indoor units that are compatible with different types of outdoor units. Outdoor units Composing units Maximum total Maximum Types of connectable capacity of con- number of indoor units...

  • Page 29: Types And Maximum Allowable Length Of Cables

    [2-2 Types and Maximum Allowable Length of Cables ] Types and Maximum Allowable Length of Cables 1. Wiring work (1) Notes 1) Have all electrical work performed by an authorized electrician according to the local regulations and instructions in this man- ual.

  • Page 30: Switch Settings

    [2-3 Switch Settings ] 2) Remote controller wiring MA remote controller ME remote controller Type VCTF, VCTFK, CVV, CVS, VVR, VVF, VCT Shielded cables CVVS, CPEVS, and MVVS Number of 2-core cable 2-core cable cores Cable type 2 *3 0.3 to 1.25mm 2 *3 *5 0.3 to 1.25mm Cable size...

  • Page 31: M-Net Address Settings

    [2-4 M-NET Address Settings ] M-NET Address Settings 2-4-1 Address Settings List 1. M-NET Address settings (1) Address settings table The need for address settings and the range of address setting depend on the configuration of the system. Unit or controller Address setting Setting method Facto-...

  • Page 32: Outdoor Unit Power Jumper Connector Connection

    [2-4 M-NET Address Settings ] 2-4-2 Outdoor Unit Power Jumper Connector Connection There are limitations on the total number of units that are connectable to each refrigerant system. Refer to the DATABOOK for details. System configu- Connection to Power supply unit Group operation Power supply switch connector connection ration...

  • Page 33: Start/Stop Control Of Indoor Units

    [2-4 M-NET Address Settings ] 2-4-5 Start/Stop Control of Indoor Units Each indoor unit (or group of indoor units) can be controlled individually by setting SW 1-9 and 1-10. *4 *5 Setting (SW1) Operation of the indoor unit when the operation is resumed after the unit was Function stopped Power ON/OFF by...

  • Page 34: Various Control Methods Using The Signal Input/Output Connector On Outdoor Unit

    [2-4 M-NET Address Settings ] 2-4-7 Various Control Methods Using the Signal Input/Output Connector on Outdoor Unit (1) Various connection options Terminal Type Usage Function to be Option used Input Prohibiting cooling/heating operation (thermo OFF) by an external DEMAND (level) CN3D Adapter for input to the outdoor unit.
  • Page 35 [2-4 M-NET Address Settings ] (1) CN51 (2) CN3S Outdoor unit External input Relay circuit adapter External input control board Distant control Relay circuit adapter 1 Outdoor unit board CN3S control board CN51 Preparations in the field Maximum cable Preparations length is 10m Maximum cable in the field...

  • Page 36: Demand Control Overview

    [2-5 Demand Control Overview ] Demand Control Overview (1) General outline of control Demand control is performed by using the external signal input to the 1-2 and 1-3 pins of CN3D on the outdoor units (OC, OS1, and OS2). Between 2 and 8 steps of demand control is possible by setting DIP SW6-8 on the outdoor units (OC, OS1, and OS2). DipSW6-8 Demand control switch Input to CN3D *2...
  • Page 37 [2-5 Demand Control Overview ] (*3) 2) When SW6-8 on one outdoor unit in one refrigerant circuit system is set to ON (4 levels of on-DEMAND) CN3D 1-2P CN3D 1-3P Open Short-circuit Open 100% (No DEMAND) Short-circuit 0% (Compressor OFF) *3.

  • Page 38: System Connection Example

    [2-6 System Connection Example ] System Connection Example Examples of typical system connection are shown below. Refer to the Installation Manual that came with each device or controller for details. (1) An example of a system to which an MA remote controller is connected System Address start up for in- Connection to the system controller...

  • Page 39: Example System With An Ma Remote Controller

    [2-7 Example System with an MA Remote Controller ] Example System with an MA Remote Controller 2-7-1 Single Refrigerant System (Automatic Indoor/Outdoor Address Startup) (1) Sample control wiring Interlock operation with the ventilation unit Leave the male Leave the male Leave the male Group Group...
  • Page 40 [2-7 Example System with an MA Remote Controller ] od.) (4) Wiring method Group operation of indoor units 1) Indoor/outdoor transmission line To perform a group operation of indoor units (IC), daisy- Daisy-chain terminals M1 and M2 on the terminal block chain terminals 1 and 2 on the terminal block (TB15) on for indoor-outdoor transmission line (TB3) on the outdoor all indoor units (IC) in the same group, and then connect...

  • Page 41: Single Refrigerant System With Two Or More Lossnay Units

    [2-7 Example System with an MA Remote Controller ] 2-7-2 Single Refrigerant System with Two or More LOSSNAY Units (1) Sample control wiring Interlock operation with the ventilation unit Leave the male Leave the male Leave the male Group Group connector on connector on connector on...
  • Page 42 [2-7 Example System with an MA Remote Controller ] 4) LOSSNAY connection (4) Wiring method Connect terminals M1 and M2 on the terminal block 1) Indoor/outdoor transmission line (TB5) on the indoor unit (IC) to the appropriate terminals Same as 2-7-1 on the terminal block (TB5) on LOSSNAY (LC).

  • Page 43: Grouped Operation Of Units In Separate Refrigerant Circuits

    [2-7 Example System with an MA Remote Controller ] 2-7-3 Grouped Operation of Units in Separate Refrigerant Circuits (1) Sample control wiring Interlock operation with the ventilation unit Move the male connector Leave the male Leave the male from CN41 to CN40. Group Group Group...
  • Page 44 [2-7 Example System with an MA Remote Controller ] a power failure, daisy-chain TB7 of OC, OS1, and OS2. (4) Wiring method (If there is a problem with the outdoor unit whose power 1) Indoor/outdoor transmission line jumper was moved from CN41 to CN40, centralized con- trol is not possible, even if TB7's are daisy-chained).

  • Page 45: System With A Connection Of System Controller To Centralized Control Transmission Line

    [2-7 Example System with an MA Remote Controller ] 2-7-4 System with a Connection of System Controller to Centralized Control Transmission Line (1) Sample control wiring An example of a system in which a system controller is connected to the transmission cable for the centralized control system and the power is supplied from the outdoor unit Interlock operation with the ventilation unit...
  • Page 46 [2-7 Example System with an MA Remote Controller ] trol is not possible, even if TB7's are daisy-chained). (4) Wiring method c) When connecting TB7, only commence after checking 1) Indoor/outdoor transmission line that the voltage is below 20 VDC. Only use shielded cables.

  • Page 47: System With A Connection Of System Controller To Indoor-Outdoor Transmission Line

    [2-7 Example System with an MA Remote Controller ] 2-7-5 System with a Connection of System Controller to Indoor-Outdoor Transmission Line (1) Sample control wiring Interlock operation with the ventilation unit Move the male connector Leave the male Leave the male from CN41 to CN40.
  • Page 48 [2-7 Example System with an MA Remote Controller ] same refrigerant circuit, connect the transmission line for (4) Wiring method centralized control to TB7 on the OC (Note a). To maintain centralized control even during an OC failure or a power fail- 1) Indoor/outdoor transmission line ure, daisy-chain TB7 of OC, OS1, and OS2.

  • Page 49: Example System With An Me Remote Controller

    [2-8 Example System with an ME Remote Controller ] Example System with an ME Remote Controller 2-8-1 System with a Connection of System Controller to Centralized Control Transmission Line (1) Sample control wiring Interlock operation with the ventilation unit Move the male connector Leave the male Leave the male from CN41 to CN40.
  • Page 50 [2-8 Example System with an ME Remote Controller ] When 2 remote controllers are connected to the sys- (4) Wiring method 1) Indoor/outdoor transmission line Refer to the section on Switch Setting. Same as 2-7-1 Performing a group operation (including the group operation of units in different refrigerant circuits).

  • Page 51: Example System With An Ma And An Me Remote Controller

    [2-9 Example System with an MA and an ME Remote Controller ] Example System with an MA and an ME Remote Controller 2-9-1 System with a Connection of System Controller to Centralized Control Transmission Line (1) Sample control wiring Move the male connector Leave the male Leave the male from CN41 to CN40.
  • Page 52 [2-9 Example System with an MA and an ME Remote Controller ] Same as 2-7-1 (4) Wiring method Group operation of indoor units 1) Indoor/outdoor transmission line Same as 2-7-1 Same as 2-7-1 4) ME remote controller wiring Shielded cable connection Same as 2-8-1 Same as 2-7-1 When 2 remote controllers are connected to the sys-...

  • Page 53: 2-10 Restrictions On Refrigerant Pipes

    [2-10 Restrictions on Refrigerant Pipes ] 2-10 Restrictions on Refrigerant Pipes 2-10-1 Restrictions on Refrigerant Pipe Length (1) HP200, 250YNW models Outdoor unit Branch header First branch (Branch joint) Indoor Indoor Indoor Branch joint Indoor Indoor Indoor Unit: m [ft] Allowable length of Operation Pipe sections...
  • Page 54 [2-10 Restrictions on Refrigerant Pipes ] (2) HP400, 500YSNW models Provide a trap on the pipe (gas pipe only) within 2 m from the Note1 Install the pipe that connects the branch pipe and the outdoor units in joint pipe if the total length of the pipe that connects the joint the way that it has a downward inclination toward the branch pipe.
  • Page 55 [2-10 Restrictions on Refrigerant Pipes ] When the vertical separation between indoor units exceeds 15 m Outdoor unit above indoor unit example 1 example 2 Outdoor Outdoor Increase the size of the pipe indicated by Increase the size of the pipe indicated by Outdoor unit unit...

  • Page 56: Restrictions On Refrigerant Pipe Size

    [2-10 Restrictions on Refrigerant Pipes ] 2-10-2 Restrictions on Refrigerant Pipe Size (1) Diameter of the refrigerant pipe between the outdoor unit and the first branch (outdoor unit pipe size) Outdoor unit set name Liquid pipe size (mm) [inch] Gas pipe size (mm) [inch] (total capacity) 200 model ø9.52 [3/8"]...
  • Page 57 [2-10 Restrictions on Refrigerant Pipes ] (3) Size of the refrigerant pipe between the branches for connection to indoor units Total capacity of the Liquid pipe size (mm) [inch] Gas pipe size (mm) [inch] downstream units - 140 ø9.52 [3/8"] ø15.88 [5/8"] P141 - P200 ø9.52 [3/8"]...

  • Page 58: Chapter 3 Major Components, Their Functions And Refrigerant Circuits

    Chapter 3 Major Components, Their Functions and Refrigerant Circuits External Appearance and Refrigerant Circuit Components of Outdoor Unit........1 3-1-1 External Appearance of Outdoor Unit ..................... 1 3-1-2 Outdoor Unit Refrigerant Circuits......................2 Outdoor Unit Refrigerant Circuit Diagrams..................3 Functions of the Major Components of Outdoor Unit............... 4 Functions of the Major Components of Indoor Unit................
  • Page 59 GB_BS_03_M...

  • Page 60: External Appearance And Refrigerant Circuit Components Of Outdoor Unit

    [3-1 External Appearance and Refrigerant Circuit Components of Outdoor Unit ] External Appearance and Refrigerant Circuit Components of 3 Major Components, Their Functions and Refrigerant Circuits Outdoor Unit 3-1-1 External Appearance of Outdoor Unit (1) PUHY-HP200, 250YNW-A Fan guard Fan guard Fin guard Fin guard Heat exchanger...

  • Page 61: Outdoor Unit Refrigerant Circuits

    [3-1 External Appearance and Refrigerant Circuit Components of Outdoor Unit ] 3-1-2 Outdoor Unit Refrigerant Circuits (1) PUHY-HP200, 250YNW-A Check valve (CV1) Linear expansion valve (LEV1) Low-pressure sensor (63LS) Subcool coil Oil separator High-pressure check joint (CJ1) High-pressure sensor (63HS1) Accumulator High-pressure switch (63H1)

  • Page 62: Outdoor Unit Refrigerant Circuit Diagrams

    [3-2 Outdoor Unit Refrigerant Circuit Diagrams ] Outdoor Unit Refrigerant Circuit Diagrams (1) PUHY-HP200, 250YNW-A BS_03_M chapter 3 -...

  • Page 63: Functions Of The Major Components Of Outdoor Unit

    [3-3 Functions of the Major Components of Outdoor Unit ] Functions of the Major Components of Outdoor Unit Part Symbols Notes Usage Specifications Check method name (functions) Com- Adjusts the amount of circulating HP200 models pressor (Comp1) refrigerant by adjusting the operat- Low-pressure shell scroll ing frequency based on the oper- compressor...
  • Page 64 [3-3 Functions of the Major Components of Outdoor Unit ] Part Symbols Notes Usage Specifications Check method name (functions) Thermis- 1) Detects discharge air tem- Degrees Celsius Resistance check (Discharge perature = 7.465k temperature) = 4057 2) Provides high-pressure pro- 25/120 tection 7.465...
  • Page 65 [3-3 Functions of the Major Components of Outdoor Unit ] Part Symbols Notes Usage Specifications Check method name (functions) Sole- SV1a 1) High/low pressure bypass at AC220-240V Continuity check noid Discharge- Open while being powered/ with a tester start-up and stopping, and valve suction closed while not being pow-...

  • Page 66: Functions Of The Major Components Of Indoor Unit

    [3-4 Functions of the Major Components of Indoor Unit ] Functions of the Major Components of Indoor Unit Part Symbol Notes Usage Specification Check method Name (functions) Linear 1) Adjusts superheat at the DC12V Continuity Test with a expan- Opening of stepping motor Tester.
  • Page 67 [3-4 Functions of the Major Components of Indoor Unit ] - chapter 3 BS_03_M...

  • Page 68: Chapter 4 Electrical Components And Wiring Diagrams

    Chapter 4 Electrical Components and Wiring Diagrams Outdoor Unit Circuit Board Arrangement................... 1 4-1-1 Outdoor Unit Control Box........................1 Outdoor Unit Circuit Board Components ................... 3 4-2-1 Control Board............................3 4-2-2 Power-supply board (PS Board) ......................4 4-2-3 Inverter Board (INV Board) ........................5 4-2-4 Fan Board ...............................
  • Page 69 GB_BS_04_M...

  • Page 70: Outdoor Unit Circuit Board Arrangement

    [4-1 Outdoor Unit Circuit Board Arrangement ] Outdoor Unit Circuit Board Arrangement 4 Electrical Components and Wiring Diagrams 4-1-1 Outdoor Unit Control Box <HIGH VOLTAGE WARNING> Control box houses high-voltage parts. When opening or closing the front panel of the control box, do not let it come into contact with any of the internal components.
  • Page 71 [4-1 Outdoor Unit Circuit Board Arrangement ] 1) Refrigerant pipes are connected to the back of the control box. Do not forcibly pull out the control box. Doing so may result in deformation of the pipe. 2) Exercise caution not to damage the front panel of the control box. Damage to this part affect the waterproof and dust proof properties of the control box and may result in damage to its internal components.

  • Page 72: Outdoor Unit Circuit Board Components

    [4-2 Outdoor Unit Circuit Board Components ] Outdoor Unit Circuit Board Components 4-2-1 Control Board CNPS CN603 Cooling fan control signal output CN4/4A/4B/4C Abbreviated name 5 VDC output Inverter reset signal output Serial communication Power-supply CN600 of connector color signal output CN601 signal output 9 VDC input...

  • Page 73: Power-Supply Board (Ps Board)

    [4-2 Outdoor Unit Circuit Board Components ] 4-2-2 Power-supply board (PS Board) CN100 L2-N Voltage input Zero-cross output Ground Ground Ground CNFG5 Ground CN300 Booster COMP gate voltage output Ground CNDC MAIN power-supply output 9 VDC output 13 VDC output LED1 Indoor unit system power supply...

  • Page 74: Inverter Board (Inv Board)

    [4-2 Outdoor Unit Circuit Board Components ] 4-2-3 Inverter Board (INV Board) CN-P, CN-N Connects to RYPN IGBT (rear) SC-P DCL terminal SC-L1 SC-P1 Input (L1) DCL terminal SC-L2 Input (L2) CNRY 12 VDC GND (Power-supply board) SC-L3 Input (L3) SC-U LED1 Inverter output (U)

  • Page 75: Fan Board

    [4-2 Outdoor Unit Circuit Board Components ] 4-2-4 Fan Board LED01 Lit: Inverter operation CNDCP Blinking: Inverter error LED04 Bus voltage input (N) Lit: Microcomputer in operation RSH03 Current detection resistor RSH02 Current detection resistor RSH01 Current detection resistor CN81 17 VDC input CNINV Inverter output...

  • Page 76: Noise Filter

    [4-2 Outdoor Unit Circuit Board Components ] 4-2-5 Noise Filter Surge absorber circuit Surge absorber circuit Open-phase detection circuit Open-phase detection circuit Ground CNFG BLUE F1, F2, F3, F4 DSA1 Fuse 250 VAC 6.3 A TB13 Input (L3) TB12 Input (L2) 30PTST8C5 TB14 INPUT...

  • Page 77: Capacitor Board (Cap Board)

    [4-2 Outdoor Unit Circuit Board Components ] 4-2-6 Capacitor Board (CAP Board) CN-CAP Connects to INV42Y FT-P1C Connects to INV42Y C1-C4 Smoothing capacitor 1) When opening or closing the front panel of the control box, do not let it come into contact with any of the internal components. Before inspecting the inside of the control box, turn off the power, keep the unit off for at least 10 minutes, and confirm that the capacitor voltage (inverter main circuit) has dropped to 20 VDC or less.

  • Page 78: Outdoor Unit Electrical Wiring Diagrams

    [4-3 Outdoor Unit Electrical Wiring Diagrams ] Outdoor Unit Electrical Wiring Diagrams PUHY-HP200, 250YNW-A BS_04_M chapter 4 -...

  • Page 79: Transmission Booster Electrical Wiring Diagrams

    [4-4 Transmission Booster Electrical Wiring Diagrams ] Transmission Booster Electrical Wiring Diagrams Terminal block for power supply (TB1) 250V 5A Red Red Red Black White White Green/Yellow 220 - 240VAC Varistor Noise filter Black White White White White Varistor Green Black Stabilized power supply Blue...

  • Page 80: Chapter 5 Control

    Chapter 5 Control Dipswitch Functions and Factory Settings ..................1 5-1-1 Outdoor Unit Switch Functions and Factory Settings ................1 5-1-2 Indoor Unit Switch Functions and Factory Settings ................7 5-1-3 Remote Controller Switch Functions and Factory Settings..............8 Outdoor Unit Control .......................... 10 5-2-1 Overview ...............................
  • Page 81 GB_BS_05_L...

  • Page 82: Dipswitch Functions And Factory Settings

    [5-1 Dipswitch Functions and Factory Settings ] Dipswitch Functions and Factory Settings 5 Control 5-1-1 Outdoor Unit Switch Functions and Factory Settings (1) Control board Function according to switch setting Units that require Switch Function Switch setting timing switch setting (Note 2) Set to 00 or 51-100 with the dial Unit address setting...
  • Page 83 [5-1 Dipswitch Functions and Factory Settings ] Function according to switch setting Units that require Switch Function Switch setting timing switch setting (Note 2) Enables or disables the de- tection of the following types of inverter compres- sor errors ACCT, DCCT sensor er- ror(5301 Detail code 115, Error detection 116)
  • Page 84 [5-1 Dipswitch Functions and Factory Settings ] 1) Unless otherwise specified, leave the switch to OFF where indicated by "-," which may be set to OFF for a reason. 2) A: Only the switch on OC needs to be set for the setting to be effective. B: The switches on both the OC and OS need to be set to the same setting for the setting to be effective.
  • Page 85 [5-1 Dipswitch Functions and Factory Settings ] (2) Additional dipswitch settings at time of shipment Function according to switch setting Units that require Switch Function Switch setting timing switch setting OFF (LED3 Unlit) ON (LED3 Lit) (Note 2) 1-10 Self-diagnosis/operation SW6-10: Anytime after power on 1:ON, 0:OFF...
  • Page 86 [5-1 Dipswitch Functions and Factory Settings ] To change the settings, set SW6-10 to ON, set SW4, and press and hold SWP3 for 2 seconds or longer (OFF↔ON). LED3 will light up when the switch setting is ON, and lights off when OFF. Use the LED3 display to confirm that the settings are properly made.
  • Page 87 [5-1 Dipswitch Functions and Factory Settings ] (3) Fan board Function according to switch setting Switch Function Switch setting timing Enabling/Disabling no-load operation No-load oper- No-load oper- Anytime after power on No-load operation will continue for ap- ation disabled ation enabled proximately 30 seconds, and then the unit will come to an abnormal stop.

  • Page 88: Indoor Unit Switch Functions And Factory Settings

    [5-1 Dipswitch Functions and Factory Settings ] 5-1-2 Indoor Unit Switch Functions and Factory Settings (1) Dipswitches 1) SW1,3 Function according to switch setting Switch setting timing Switch Function Notes Set to ON (built-in sensor on the remote controller) Room temperature Built-in sensor on Indoor unit inlet on All Fresh (PEFY-VMH-F) model units...
  • Page 89 [5-1 Dipswitch Functions and Factory Settings ] 2) SW2 Model Capacity (model) code setting Model P100 P125 P140 P200 P250 Capacity (model) code setting The figure at left shows that the switches 1 through 5 are set to ON and 6 through 10 are set to OFF. 9 10 The setting timing for SW2 is before power is turned on.
  • Page 90 [5-1 Dipswitch Functions and Factory Settings ] (2) ME remote controller (PAR-F27MEA) Set the address of the remote controller with the rotary switch. Rotary switch 10's digit 1's digit (left) (right) Remote controller unit Example: In case of address 108 Address setting range Setting method Main remote controller...

  • Page 91: Outdoor Unit Control

    [5-2 Outdoor Unit Control ] Outdoor Unit Control 5-2-1 Overview The outdoor units are designated as OC, OS1 and OS2 in the order of capacity from large to small (if two or more units have the same capacity, in the order of address from small to large). The setting of outdoor unit can be verified by using the self-diagnosis switch (SW4).

  • Page 92: Refrigerant Bypass Control

    [5-2 Outdoor Unit Control ] 5-2-5 Refrigerant Bypass Control Bypass solenoid valves (SV1a), which bypass the high- and low- pressure sides, perform the following functions. (1) Bypass solenoid valve (SV1a) (ON = Open), (SV2) (ON = Open), (SV9) (ON = Open) SV1a Operation When starting-up the compressor of each...

  • Page 93: Frequency Control

    [5-2 Outdoor Unit Control ] 5-2-6 Frequency Control Depending on the capacity required, the frequency of the compressor is controlled to keep constant evaporation temperature (0°C [32°F] = 0.71 MPa [103 psi]) during cooling operation, and condensing temperature (49°C [120°F] = 2.88 MPa [418 psi]) during heating operation.

  • Page 94: Defrost Operation Control

    [5-2 Outdoor Unit Control ] 5-2-7 Defrost Operation Control (1) Starting the defrost operation The defrost cycle will start when all of the following three conditions are met: outside temperature, cumulative compressor operation time, and evaporating temperature under <Condition 1>, <Condition 2>, or <Condition 3> are met. Condition 1 Condition 2 Condition 3...
  • Page 95 [5-2 Outdoor Unit Control ] (2) Defrost operation Compressor frequency Model Compressor frequency HP200 model 103 Hz HP250 model 113 Hz Outdoor unit fan Stopped SV1a 21S4a 21S4b, 21S4c SV10 OFF (Closed) LEV1 0 pulses LEV2a, LEV2b 3000 pulses LEV4 0 pulses *1.

  • Page 96: Refrigerant Recovery Control

    [5-2 Outdoor Unit Control ] 5-2-8 Refrigerant Recovery Control Recovery of refrigerant is performed during heating operation to prevent the refrigerant from accumulating inside the unit while it is stopped (unit in fan mode), or inside the indoor unit that is in cooling mode or in heating mode with thermo off. It is also performed during cooling operation to prevent an excessive amount of refrigerant from accumulating in the outdoor heat exchanger.

  • Page 97: Outdoor Unit Fan Control

    [5-2 Outdoor Unit Control ] 5-2-9 Outdoor Unit Fan Control (1) Control method Depending on the capacity required, the rotation speed of the outdoor unit fan is controlled by the inverter, targeting a constant evaporation temperature of (0°C [32°F]= 0.71 MPa [103 psi]) during cooling operation and constant condensing temperature of (49°C [120°F]= 2.88 MPa [418 psi]) during heating operation.

  • Page 98: Subcool Coil Control (Linear Expansion Valve )

    [5-2 Outdoor Unit Control ] 5-2-10 Subcool Coil Control (Linear Expansion Valve <LEV1>) The OC, OS1, and OS2 controls the subcool coil individually. The LEV is controlled every 30 seconds to maintain constant the subcool at the outdoor unit heat exchanger outlet that is calculated from the values of high pressure (63HS1) and liquid piping temperature (TH3), or the superheat that is calculated from the values of low pressure (63LS) and the bypass outlet temperature (TH2) of the subcool coil.
  • Page 99 [5-2 Outdoor Unit Control ] (2) HP400, 500YSNW models Initial startup mode starts. The compressor on the OC starts up. 60Hz The total operating load of the indoor unit after 5 minutes of operation is P250 or above. (*1 Qj The compressor on the OC starts up.

  • Page 100: Emergency Operation Mode

    [5-2 Outdoor Unit Control ] 5-2-15 Emergency Operation Mode 1. Problems with the outdoor unit Emergency operation mode is a mode in which outdoor units that are operating normally take over the operation of the out- door units that are experiencing problems. (HP400, 500YSNW models go into an emergency operation mode when one out- door unit is in trouble.) This mode can be started by performing an error reset via the remote controller.
  • Page 101 [5-2 Outdoor Unit Control ] (2) Ending the emergency operation 1) End conditions When one of the following conditions is met, emergency operation stops, and the unit makes an error stop. When the integrated operation time of compressor in cooling mode has reached four hours. When the integrated operation time of compressor in heating mode has reached two hours.

  • Page 102: Operation Mode

    [5-2 Outdoor Unit Control ] 5-2-16 Operation Mode (1) Indoor unit operation mode The operation mode can be selected from the following 5 modes using the remote controller. Cooling mode Heating mode Dry mode Fan mode Stopping mode (2) Outdoor unit operation mode Cooling mode All indoor units in operation are in cooling mode.
  • Page 103 [5-2 Outdoor Unit Control ] - chapter 5 BS_05_L...

  • Page 104: Chapter 6 Test Run

    Chapter 6 Test Run Read before Test Run........................... 1 Operation Characteristics and Refrigerant Charge ................2 Evaluating and Adjusting Refrigerant Charge ................... 2 6-3-1 Refrigerant Overcharge and undercharge ....................2 6-3-2 Checking the Refrigerant Charge during Operation................2 6-3-3 Maximum refrigerant charge ........................3 6-3-4 Refrigerant Charge Adjustment Mode ....................
  • Page 105 GB_BS_06_L...

  • Page 106: Read Before Test Run

    [6-1 Read before Test Run ] Read before Test Run 6 Test Run (1) Check for refrigerant leak and loose cables and connectors. (2) When opening or closing the front panel of the control box, do not let it come into contact with any of the internal components.

  • Page 107: Operation Characteristics And Refrigerant Charge

    [6-2 Operation Characteristics and Refrigerant Charge ] Operation Characteristics and Refrigerant Charge It is important to have a clear understanding of the characteristics of refrigerant and the operating characteristics of air conditioners before attempting to adjust the refrigerant amount in a given system. The following shows items of particular importance.

  • Page 108: Maximum Refrigerant Charge

    [6-3 Evaluating and Adjusting Refrigerant Charge ] 6-3-3 Maximum refrigerant charge There is a limit to the amount of refrigerant that can be charged into a unit. Observe the maximum refrigerant charge in the table below. HP200, 250YNW-A Total index of the outdoor units HP200 HP250 Factory charge (kg)

  • Page 109: Refrigerant Charge Adjustment Mode

    [6-3 Evaluating and Adjusting Refrigerant Charge ] 6-3-4 Refrigerant Charge Adjustment Mode Follow the procedures below to add or extract refrigerant as necessary depending on the operation mode. When the function switch (SW4 (922)) on the main board on the outdoor unit (OC only) is turned to ON, the unit goes into the refrigerant amount adjust mode, and the following sequence is followed.
  • Page 110 [6-3 Evaluating and Adjusting Refrigerant Charge ] Start Turn on SW4 (922) on the OC. Put all indoor units in the test run mode and run the units in cooling mode. Has the initial start-up mode been completed? Has it been at least 30 minutes since start up? Gradually add refrigerant from...

  • Page 111: The Following Symptoms Are Normal

    [6-4 The Following Symptoms Are Normal ] The Following Symptoms Are Normal Remote controller Symptoms Cause display The indoor unit does not start "Cooling (heating)" The unit cannot perform a heating (cooling) operation when other indoor after starting cooling (heating) icon blinks on the units on the same refrigerant system, are performing a cooling (heating) operation.

  • Page 112: Chapter 7 Troubleshooting Using Error Codes

    Chapter 7 Troubleshooting Using Error Codes Error Code and Preliminary Error Code Lists ..................1 Error Code Definitions and Solutions: Codes [0 - 999] ..............6 7-2-1 Error Code [0403] ........................... 6 7-2-2 Error Code [0404] ........................... 7 Error Code Definitions and Solutions: Codes [1000 - 1999] ............. 8 7-3-1 Error Code [1102] ...........................
  • Page 113 7-7-2 Error Code [5102,5103,5104,5105,5106,5107,5115] ................36 7-7-3 Error Code [5110] ..........................37 7-7-4 Error Code [5201] ..........................38 7-7-5 Error Code [5301] Detail Code 115....................... 38 7-7-6 Error Code [5301] Detail Code 117....................... 39 7-7-7 Error Code [5301] Detail Code 119....................... 39 7-7-8 Error Code [5301] Detail Code 120.......................

  • Page 114: Error Code And Preliminary Error Code Lists

    [7-1 Error Code and Preliminary Error Code Lists ] Error Code and Preliminary Error Code Lists 7 Troubleshooting Using Error Codes Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code 4300 0403 4305 Serial communication error/Panel communication error (page 6)
  • Page 115 [7-1 Error Code and Preliminary Error Code Lists ] Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code 4240 4245 4340 Overload protection (page 29) 4246 Backup operation [101] IPM error (page 30) 4250 4350 [104]...
  • Page 116 [7-1 Error Code and Preliminary Error Code Lists ] Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code Backup operation 5110 1214 Heatsink temperature Temperature sensor fault (page 37) (THHS) 5201 High-pressure sensor fault (63HS1) (page 38) Backup operation [115]...
  • Page 117 [7-1 Error Code and Preliminary Error Code Lists ] Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code A control communication transmission/reception hard- 6842 (page 61) ware trouble 6843 A control communication start bit detection error (page 62) 6846 Start-up time over...
  • Page 118 [7-1 Error Code and Preliminary Error Code Lists ] The last digit in the check error codes in the 4000's and 5000's and two-digit detail codes indicate if the codes apply to com- pressor inverter on fan inverter. Example Code 4225 (detail code 108): Bus voltage drop in the fan inverter system Code 4230 : Heatsink overheat protection in the compressor inverter system The last digit Inverter system...

  • Page 119: Error Code Definitions And Solutions: Codes [0 - 999]

    [7-2 Error Code Definitions and Solutions: Codes [0 - 999] ] Error Code Definitions and Solutions: Codes [0 - 999] 7-2-1 Error Code [0403] 1. Error code definition Serial communication error 2. Error definition and error detection method Serial communication error between the control board and the INV board on the compressor, and between the control board and the Fan board Detail code 1: Between the control board and the INV board Detail code 5, 6: Between the control board and the Fan board...

  • Page 120: Error Code [0404]

    [7-2 Error Code Definitions and Solutions: Codes [0 - 999] ] 7-2-2 Error Code [0404] 1. Error code definition Indoor unit control-related errors 2. Error definition and error detection method Indoor controller board Abnormal if data cannot be read normally from the nonvolatile memory of the indoor controller board. 3.

  • Page 121: Error Code Definitions And Solutions: Codes [1000 - 1999]

    [7-3 Error Code Definitions and Solutions: Codes [1000 - 1999] ] Error Code Definitions and Solutions: Codes [1000 - 1999] 7-3-1 Error Code [1102] 1. Error code definition Discharge temperature fault 2. Error definition and error detection method 1) If the discharge temperature of 120 °C [248°F] or more is detected during the operation (the first detection), the outdoor unit stops once, turns to anti-restart mode for 3 minutes, and restarts after 3 minutes automatically.

  • Page 122: Error Code [1301]

    [7-3 Error Code Definitions and Solutions: Codes [1000 - 1999] ] 7-3-2 Error Code [1301] 1. Error code definition Low pressure fault 2. Error definition and error detection method When starting the compressor from Stop Mode for the first time if low pressure reads 0.098MPa [14psi] immediately before start-up, the operation immediately stops.

  • Page 123: Error Code [1302] (During Operation)

    [7-3 Error Code Definitions and Solutions: Codes [1000 - 1999] ] 7-3-3 Error Code [1302] (during operation) 1. Error code definition High pressure fault 1 (Outdoor unit) 2. Error definition and error detection method 1) If the pressure of 3.78MPa [548psi] or higher is detected by the pressure sensor during operation (the first detection), the out- door stops once, turns to antirestart mode for 3 minutes, and restarts after 3 minutes automatically.

  • Page 124: Error Code [1302] (At Startup)

    [7-3 Error Code Definitions and Solutions: Codes [1000 - 1999] ] 7-3-4 Error Code [1302] (at startup) 1. Error code definition High pressure fault 2 (Outdoor unit) 2. Error definition and error detection method If the pressure of 0.098MPa [14psi] or lower is registered on the pressure sensor immediately before start-up, it will trigger an abnormal stop, and error code "1302"...

  • Page 125: Error Code Definitions And Solutions: Codes [2000 - 2999]

    [7-4 Error Code Definitions and Solutions: Codes [2000 - 2999] ] Error Code Definitions and Solutions: Codes [2000 - 2999] 7-4-1 Error Code [2500] (Models with a drain sensor) 1. Error code definition Drain sensor submergence 2. Error definition and error detection method 1) If an immersion of the drain sensor in the water is detected while the unit is in any mode other than the Cool/Dry mode and when the drain pump goes from OFF to ON, this condition is considered preliminary water leakage.

  • Page 126: Error Code [2500] (Models With A Float Switch)

    [7-4 Error Code Definitions and Solutions: Codes [2000 - 2999] ] 7-4-2 Error Code [2500] (Models with a float switch) 1. Error code definition Drain sensor submergence 2. Error definition and error detection method 1) If an immersion of the float switch in the water is detected while the unit is in any mode other than the Cool/Dry mode and when the drain pump goes from OFF to ON, this condition is considered preliminary water leakage.

  • Page 127: Error Code [2502] (Models With A Drain Sensor)

    [7-4 Error Code Definitions and Solutions: Codes [2000 - 2999] ] 7-4-3 Error Code [2502] (Models with a drain sensor) 1. Error code definition Drain pump fault 2. Error definition and error detection method 1) Make the drain sensor thermistor self-heat by passing current through it. If the temperature rise is small, it is interpreted that the sensor is immersed in water.

  • Page 128: Error Code [2502] (Models With A Float Switch)

    [7-4 Error Code Definitions and Solutions: Codes [2000 - 2999] ] 7-4-4 Error Code [2502] (Models with a float switch) 1. Error code definition Drain pump fault 2. Error definition and error detection method 1) The immersion of sensor tip in water is detected by the ON/OFF signal from the float switch. Submergence of the sensor When it is detected that the float switch has been ON for 15 seconds, it is interpreted that the sensor tip is immersed in water.

  • Page 129: Error Code [2503]

    [7-4 Error Code Definitions and Solutions: Codes [2000 - 2999] ] 7-4-5 Error Code [2503] 1. Error code definition Drain sensor (Thd) fault 2. Error definition and error detection method If the open or short circuit of the thermistor has been detected for 30 seconds, this condition is considered to be a preliminary error, and the unit goes into the 3-minute restart delay mode.

  • Page 130: Error Code [2601]

    [7-4 Error Code Definitions and Solutions: Codes [2000 - 2999] ] 7-4-6 Error Code [2600] 1. Error code definition Water leakage 2. Cause, check method and remedy Check that water does not leak from the pipes in such as the humidifier. 7-4-7 Error Code [2601] 1.

  • Page 131: Error Code Definitions And Solutions: Codes [3000 - 3999]

    [7-5 Error Code Definitions and Solutions: Codes [3000 - 3999] ] Error Code Definitions and Solutions: Codes [3000 - 3999] 7-5-1 Error Code [3121] 1. Error code definition Out-of-range outside air temperature 2. Error definition and error detection method When the thermistor temperature of -33°C[-27°F] or below has continuously been detected for 3 minutes during heating op- eration (during compressor operation), the unit makes an error stop and "3121"...

  • Page 132: Error Code [3511]

    [7-5 Error Code Definitions and Solutions: Codes [3000 - 3999] ] 7-5-2 Error Code [3511] 1. Error code definition Refrigerant overcooling 2. Error definition and error detection method 1) If the condition "THHS ≤ A °C remains true for continuous 6 minutes and 30 seconds" is met (for the first time) during oper- ation, the outdoor unit will stop, go into the three-minute restart delay mode, and then automatically resume operation after three minutes have passed.
  • Page 133 [7-5 Error Code Definitions and Solutions: Codes [3000 - 3999] ] 7-5-3 Error Code [3512] 1. Error code definition Cooling fan locking 2. Error definition and error detection method The motor on the cooling fan locks during operation. 3. Cause, check method and remedy Cause Check method and remedy Locked cooling fan motor...

  • Page 134: Error Code Definitions And Solutions: Codes [4000 - 4999]

    [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] Error Code Definitions and Solutions: Codes [4000 - 4999] 7-6-1 Error Code [4102] 1. Error code definition Open phase 2. Error definition and error detection method An open phase of the power supply (L1 phase, N phase) was detected at power on. The L3 phase current is outside of the specified range.

  • Page 135: Error Code [4106]

    [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-6-2 Error Code [4106] 1. Error code definition <Transmission power supply fault Error detail code FF (Outdoor unit)> 2. Error definition and error detection method Transmission power output failure 3.

  • Page 136: Error Code [4121]

    [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-6-4 Error Code [4114] 1. Error code definition Indoor unit fan motor error 2. Error definition and error detection method When the fan motor output from the indoor unit circuit board is ON and when the rotation speed input from the fan motor cannot be detected for 30 seconds or more 3.
  • Page 137 [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-6-7 Error Code [4124] 1. Error code definition Electric system not operate due to damper abnormality 2. Error definition and error detection method When the damper is not located at the designated position. 3.

  • Page 138: Error Code [4220, 4225, 4226] Detail Code 108

    [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-6-8 Error Code [4220, 4225, 4226] Detail Code 108 1. Error code definition Abnormal bus voltage drop (Detail code 108) 2. Error definition and error detection method If Vdc 289V or less is detected during Inverter operation. (S/W detection) 3.
  • Page 139 [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-6-9 Error Code [4220, 4225, 4226] Detail Code 109 1. Error code definition Abnormal bus voltage rise (Detail code 109) 2. Error definition and error detection method If Vdc 830V is detected during inverter operation.
  • Page 140 [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-6-11 Error Code [4220, 4225, 4226] Detail Code 111, 112 1. Error code definition Logic error (Detail code 111, 112) 2. Error definition and error detection method Hardware error If only the hardware error logic circuit operates, and no identifiable error is detected.
  • Page 141 [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-6-13 Error Code [4220, 4225, 4226] Detail Code 131 1. Error code definition Low bus voltage at startup (Detail code 131) 2. Error definition and error detection method When Vdc 289 V is detected just before the inverter operation.

  • Page 142: Error Code [4240, 4245, 4246]

    [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-6-15 Error Code [4235, 4236] Detail Code 125 1. Error code definition Heatsink overheat protection (Detail code 125) (outdoor unit) 2. Error definition and error detection method Detection of fan INV heatsink temperature (THHS) ≥ 100°C 3.
  • Page 143 [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-6-17 Error Code [4250, 4255, 4256] Detail Code 101 1. Error code definition IPM error (Detail code 101) 2. Error definition and error detection method In the case of 4250 If an overcurrent is detected by the overcurrent detection circuit (R100) on the INV board.
  • Page 144 [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-6-18 Error Code [4250, 4255, 4256] Detail Code 104 1. Error code definition Short-circuited IPM/Ground fault (Detail code 104) 2. Error definition and error detection method When IPM/IGBT short damage or grounding on the load side is detected just before starting the inverter. 3.
  • Page 145 [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-6-19 Error Code [4250, 4255, 4256] Detail Code 105 1. Error code definition Overcurrent error due to short-circuited motor (Detail code 105) 2. Error definition and error detection method When a short is detected on the load side just before starting the inverter operation.

  • Page 146: Error Code [4250, 4255, 4256] Detail Code 106 And 107

    [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-6-20 Error Code [4250, 4255, 4256] Detail Code 106 and 107 1. Error code definition Instantaneous overcurrent (Detail code 106) Overcurrent (effective value) (Detail code 107) 2. Error definition and error detection method When a current above the specified value is detected by the electric current sensor.

  • Page 147: Error Code [4260]

    [7-6 Error Code Definitions and Solutions: Codes [4000 - 4999] ] 7-6-21 Error Code [4255, 4256] Detail Code 137 1. Error code definition Motor synchronization loss (Detail code 137) 2. Error definition and error detection method Fan motor locking was detected during operation. 3.

  • Page 148: Error Code Definitions And Solutions: Codes [5000 - 5999]

    [7-7 Error Code Definitions and Solutions: Codes [5000 - 5999] ] Error Code Definitions and Solutions: Codes [5000 - 5999] 7-7-1 Error Code [5101, 5102, 5103, 5104] 1. Error code definition 5101 Return air temperature sensor (TH21) fault (Indoor unit) Return air temperature sensor (TH4) fault (OA processing unit) 5102 Pipe temperature sensor (TH22) fault (Indoor unit)

  • Page 149: Error Code [5102,5103,5104,5105,5106,5107,5115]

    [7-7 Error Code Definitions and Solutions: Codes [5000 - 5999] ] 7-7-2 Error Code [5102,5103,5104,5105,5106,5107,5115] 1. Error code definition 5102 HIC bypass circuit outlet temperature sensor (TH2) fault (Outdoor unit) 5103 Heat exchanger outlet temperature sensor (TH3) fault (Outdoor unit) 5104 Discharge temperature sensor (TH4) fault (Outdoor unit) 5105...

  • Page 150: Error Code [5110]

    [7-7 Error Code Definitions and Solutions: Codes [5000 - 5999] ] 3. Cause, check method and remedy Cause Check method and remedy Thermistor failure Check thermistor resistance. Pinched lead wire Check for pinched lead wire. Torn wire coating Check for wire coating. A pin on the male connector is missing or Check connector.

  • Page 151: Error Code [5201]

    [7-7 Error Code Definitions and Solutions: Codes [5000 - 5999] ] 7-7-4 Error Code [5201] 1. Error code definition High-pressure sensor fault (63HS1) 2. Error definition and error detection method If the high pressure sensor detects 0.098MPa [14psi] or less during the operation, the outdoor unit stops once, turns to anti- restart mode for 3 minutes, and restarts after 3 minutes when the detected high pressure sensor is 0.098MPa [14psi] or more.
  • Page 152 [7-7 Error Code Definitions and Solutions: Codes [5000 - 5999] ] 7-7-6 Error Code [5301] Detail Code 117 1. Error code definition ACCT sensor circuit fault (Detail code 117) 2. Error definition and error detection method When an error value is detected with the ACCT detection circuit just before the inverter starts 3.
  • Page 153 [7-7 Error Code Definitions and Solutions: Codes [5000 - 5999] ] 7-7-8 Error Code [5301] Detail Code 120 1. Error code definition Faulty ACCT wiring (Detail code 120) 2. Error definition and error detection method Presence of target current cannot be detected during the self-diagnostic operation immediately before startup. 3.
  • Page 154 [7-7 Error Code Definitions and Solutions: Codes [5000 - 5999] ] 7-7-10 Error Code [5305, 5306] Detail Code 136 1. Error code definition Current sensor/circuit fault (Detail code 136) 2. Error definition and error detection method Detection of abnormal value by the current detection circuit before the startup of fan motor 3.

  • Page 155: Error Code Definitions And Solutions: Codes [6000 - 6999]

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] Error Code Definitions and Solutions: Codes [6000 - 6999] 7-8-1 Error Code [6201] 1. Error code definition Remote controller board fault (nonvolatile memory error) 2. Error definition and error detection method This error is detected when the data cannot be read out from the built-in nonvolatile memory on the remote controller.

  • Page 156: Error Code [6600]

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-3 Error Code [6600] 1. Error code definition Address overlap 2. Error definition and error detection method An error in which signals from more than one indoor units with the same address are received Detail code 001: Detection of overlapped address in centralized control system Detail code 002: Detection of overlapped address in indoor unit system The address and attribute that appear on the remote controller indicate the controller that detected the error.

  • Page 157: Error Code [6602]

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-4 Error Code [6601] 1. Error code definition Polarity setting error 2. Error definition and error detection method The error detected when transmission processor cannot distinguish the polarities of the M-NET transmission line. Detail code 001: Detection of polarity setting error in centralized control system Detail code 002: Detection of polarity setting error in indoor unit system 3.

  • Page 158: Error Code [6606]

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-5 Error Code [6602] 1. Error code definition Transmission processor hardware error 2. Error definition and error detection method Although "0" was surely transmitted by the transmission processor, "1" is displayed on the transmission line. Detail code 001: Transmission processor hardware error in centralized control system Detail code 002: Transmission processor hardware error in indoor unit system The address/attribute appeared on the display on the remote controller indicates the controller where an error oc-...
  • Page 159 [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-6 Error Code [6603] 1. Error code definition Transmission line bus busy error 2. Error definition and error detection method Generated error when the command cannot be transmitted for 4-10 minutes in a row due to bus-busy Generated error when the command cannot be transmitted to the transmission line for 4-10 minutes in a row due to noise Detail code 001: Transmission Bus-Busy error in centralized control system Detail code 002: Transmission Bus-Busy error in indoor unit system...

  • Page 160: Error Code [6607] Error Source Address = Outdoor Unit (Oc)

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-8 Error Code [6607] Error Source Address = Outdoor Unit (OC) 1. Error code definition No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).

  • Page 161: Error Code [6607] Error Source Address = Indoor Unit (Ic)

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-9 Error Code [6607] Error Source Address = Indoor Unit (IC) 1. Error code definition No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
  • Page 162 [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] (2) Troubleshooting problems for indoor units (B) Cause Check method and remedy When the power supply unit for transmission lines is used Check voltage of the transmission line for central- and the male power supply connector is connected to the ized control.

  • Page 163: Error Code [6607] Error Source Address = Lossnay (Lc)

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-10 Error Code [6607] Error Source Address = LOSSNAY (LC) 1. Error code definition No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).

  • Page 164: Error Code [6607] Error Source Address = Me Remote Controller

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-11 Error Code [6607] Error Source Address = ME Remote Controller 1. Error code definition No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).

  • Page 165: Error Code [6607] Error Source Address = System Controller

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-12 Error Code [6607] Error Source Address = System Controller 1. Error code definition No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).

  • Page 166: Error Code [6607] All Error Source Addresses

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-13 Error Code [6607] All Error Source Addresses 1. Error code definition No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).

  • Page 167: Error Code [6607] No Error Source Address

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-14 Error Code [6607] No Error Source Address 1. Error code definition No ACK error 2. Error definition and error detection method The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is trans- mitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).

  • Page 168: Error Code [6608]

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-15 Error Code [6608] 1. Error code definition No response error 2. Error definition and error detection method When no response command is returned although acknowledgement (ACK) is received after transmission, an error is detect- When the data is transmitted 10 times in a row with 3 seconds interval, an error is detected on the transmission side.

  • Page 169: Error Code [6832]

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-16 Error Code [6831] 1. Error code definition MA remote controller signal reception error (No signal reception) 2. Error definition and error detection method Communication between the MA remote controller and the indoor unit is not done properly. No proper data has been received for 3 minutes.

  • Page 170: Error Code [6834]

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-17 Error Code [6832] 1. Error code definition MA remote controller signal transmission error (Synchronization error) 2. Error definition and error detection method MA remote controller and the indoor unit is not done properly. Failure to detect opening in the transmission path and unable to send signals Indoor unit: 3 minutes Remote controller: 6 seconds...

  • Page 171: Error Code [6841]

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-18 Error Code [6833] 1. Error code definition MA remote controller signal transmission error (Hardware error) 2. Error definition and error detection method Communication between the MA remote controller and the indoor unit is not done properly. An error occurs when the transmitted data and the received data differ for 30 times in a row.

  • Page 172: Error Code [6843]

    [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-19 Error Code [6834] 1. Error code definition MA remote controller signal reception error (Start bit detection error) 2. Error definition and error detection method Communication between the MA remote controller and the indoor unit is not done properly. No proper data has been received for 2 minutes.
  • Page 173 [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-20 Error Code [6840] 1. Error code definition Indoor-outdoor communication: Reception error 2. Error definition and error detection method Abnormal if indoor controller board could not receive any signal normally for 6 minutes after turning the power on Abnormal if indoor controller board could not receive any signal normally for 3 minutes.
  • Page 174 [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-22 Error Code [6842] 1. Error code definition Indoor-outdoor communication: Transmission error 2. Error definition and error detection method Indoor/outdoor unit communication error (Transmitting error) Abnormal if "1" receiving is detected 30 times continuously though indoor controller board has transmitted "0". 3.
  • Page 175 [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-23 Error Code [6843] 1. Error code definition A control communication start bit detection error 2. Error definition and error detection method Indoor/outdoor unit communication error Abnormal if indoor controller board could not receive any signal normally for 6 minutes after turning the power on. Abnormal if indoor controller board could not receive any signal normally for 3 minutes.
  • Page 176 [7-8 Error Code Definitions and Solutions: Codes [6000 - 6999] ] 7-8-24 Error Code [6846] 1. Error code definition Start-up time over 2. Error definition and error detection method Start-up time over The unit cannot finish start-up process within 4 minutes after power on. 3.

  • Page 177: Error Code Definitions And Solutions: Codes [7000 - 7999]

    [7-9 Error Code Definitions and Solutions: Codes [7000 - 7999] ] Error Code Definitions and Solutions: Codes [7000 - 7999] 7-9-1 Error Code [7100] 1. Error code definition Total capacity error 2. Error definition and error detection method The model total of indoor units in the system with one outdoor unit exceeds limitations. 3.

  • Page 178: Error Code [7101]

    [7-9 Error Code Definitions and Solutions: Codes [7000 - 7999] ] 7-9-2 Error Code [7101] 1. Error code definition Capacity code setting error 2. Error definition and error detection method Connection of incompatible (wrong capacity code) indoor unit or outdoor unit 3.

  • Page 179: Error Code [7102]

    [7-9 Error Code Definitions and Solutions: Codes [7000 - 7999] ] 7-9-3 Error Code [7102] 1. Error code definition Wrong number of connected units 2. Error definition and error detection method The number of connected indoor units is "0" or exceeds the allowable value. 3.

  • Page 180: Error Code [7105]

    [7-9 Error Code Definitions and Solutions: Codes [7000 - 7999] ] 7-9-4 Error Code [7105] 1. Error code definition Address setting error 2. Error definition and error detection method Erroneous setting of OC unit address 3. Error source, cause, check method and remedy Error source Cause Check method and remedy...

  • Page 181: Error Code [7113]

    [7-9 Error Code Definitions and Solutions: Codes [7000 - 7999] ] 7-9-6 Error Code [7110] 1. Error code definition Connection information signal transmission/reception error 2. Error definition and error detection method The given indoor unit is inoperable because it is not properly connected to the outdoor unit in the same system. 3.

  • Page 182: Error Code [7130]

    [7-9 Error Code Definitions and Solutions: Codes [7000 - 7999] ] 7-9-8 Error Code [7113] 1. Error code definition Function setting error (improper connection of CNTYP) 2. Error source, cause, check method and remedy After troubleshooting the error using the check methods and remedies shown below, turn the power back on. Error source Cause Check method and remedy...
  • Page 183 [7-9 Error Code Definitions and Solutions: Codes [7000 - 7999] ] 7-9-9 Error Code [7117] 1. Error code definition Model setting error 2. Error source, cause, check method and remedy After troubleshooting the error using the check methods and remedies shown below, turn the power back on. Error source Cause Check method and remedy...
  • Page 184 [7-9 Error Code Definitions and Solutions: Codes [7000 - 7999] ] 7-9-10 Error Code [7130] 1. Error code definition Incompatible unit combination 2. Error definition and error detection method The check code will appear when the indoor units with different refrigerant systems are connected or when the combination of the outdoor units is not as per [2-1 System Configurations].

  • Page 185: Unit Error Code Definitions And Solutions: Codes [Er91 - Er99]

    [7-10 Unit Error Code Definitions and Solutions: Codes [Er91 - Er99] ] 7-10 Unit Error Code Definitions and Solutions: Codes [Er91 - Er99] 7-10-1 Error Code [Er91] 1. Error code definition Firmware update error (outdoor unit) 2. Error definition and error detection method The error code will be displayed when the outdoor unit fails to write the firmware update program.
  • Page 186 Chapter 8 Troubleshooting Based on Observed Symptoms MA Remote Controller Problems......................1 8-1-1 The LCD Does Not Light Up........................1 8-1-2 The LCD Momentarily Lights Up and Then Goes Off................2 8-1-3 "HO" and "PLEASE WAIT" Do Not Go Off the Screen................3 8-1-4 Air Conditioning Units Do Not Operate When the ON Button Is Pressed.
  • Page 187 8-11 Measures for Refrigerant Leakage ....................48 8-12 Parts Replacement Instructions ......................50 8-12-1 Ensuring Maintenance Space (Preparation for the Maintenance of Refrigerant Circuit Parts)..... 50 8-12-2 Notes on Wiring Installation ........................51 8-12-3 Four-way Valve and Check Valve Replacement Procedure ..............52 8-12-4 Compressor Replacement Procedure....................

  • Page 188: Ma Remote Controller Problems

    [8-1 MA Remote Controller Problems ] MA Remote Controller Problems 8 Troubleshooting Based on Observed Symptoms 8-1-1 The LCD Does Not Light Up. 1. Phenomena Even if the operation button on the remote controller is pressed, the display remains unlit and the unit does not start running. (Power indicator ( ) is unlit and no lines appear on the remote controller.) 2.

  • Page 189: The Lcd Momentarily Lights Up And Then Goes Off

    [8-1 MA Remote Controller Problems ] 8-1-2 The LCD Momentarily Lights Up and Then Goes Off. 1. Phenomena When the remote controller operation SW is turned on, the operation status briefly appears on the display, then it goes off, and the display lights out immediately, and the unit stops. 2.

  • Page 190: Ho" And "Please Wait" Do Not Go Off The Screen

    [8-1 MA Remote Controller Problems ] 8-1-3 "HO" and "PLEASE WAIT" Do Not Go Off the Screen. 1. Phenomena "HO" or "PLEASE WAIT" display on the remote controller does not disappear, and no operation is performed even if the button is pressed.

  • Page 191: Air Conditioning Units Do Not Operate When The On Button Is Pressed

    [8-1 MA Remote Controller Problems ] 8-1-4 Air Conditioning Units Do Not Operate When the ON Button Is Pressed. 1. Phenomena Even if the operation button on the remote controller is pressed, the indoor and the outdoor units do not start running. 2.

  • Page 192: Me Remote Controller Problems

    [8-2 ME remote Controller Problems ] ME remote Controller Problems 8-2-1 The LCD Does Not Light Up. 1. Phenomena Even if the operation button on the remote controller is pressed, the display remains unlit and the unit does not start running. (Remote controller is not powered.) 2.

  • Page 193: The Lcd Momentarily Lights Up And Then Goes Off

    [8-2 ME remote Controller Problems ] 8-2-2 The LCD Momentarily Lights Up and Then Goes Off. 1. Phenomena When the remote controller operation SW is turned on, a temporary operation display is indicated, and the display lights out immediately. 2. Cause 1) The power is not supplied to the indoor unit.

  • Page 194: Ho" Or "Waiting For

    [8-2 ME remote Controller Problems ] 8-2-3 "HO" or "Waiting for ···" Does Not Go Off the Screen. 1. Phenomena "HO" or "Waiting for ···" display on the remote controller does not disappear, and no operation is performed even if the button is pressed.
  • Page 195 [8-2 ME remote Controller Problems ] 3. Check method and remedy Without using MELANS Are all the units in the system experiencing the same problem? Check the address of the ME remote controller on which "HO" is displayed. Check the address of the outdoor unit.

  • Page 196: 88", "Request Denied." Appears On The Lcd

    [8-2 ME remote Controller Problems ] 8-2-4 "88", "Request denied." Appears on the LCD. 1. Phenomena "88", "Request denied." appears on the remote controller when the address is registered or confirmed. 2. Cause, check method and remedy Cause Check method and remedy An error occurs when the address is registered or con- firmed.

  • Page 197: Refrigerant Control Problems

    [8-3 Refrigerant Control Problems ] Refrigerant Control Problems 8-3-1 Units in the Cooling Mode Do Not Operate at Expected Capacity. 1. Phenomena Although cooling operation starts with the normal remote controller display, the capacity is not enough 2. Cause, check method and remedy Cause Check method and remedy Compressor frequency does not rise sufficiently.
  • Page 198 [8-3 Refrigerant Control Problems ] Cause Check method and remedy RPM error of the outdoor unit FAN Refer to the following page(s). [8-7 Troubleshooting Outdoor Unit Fan Problems] Motor failure or board failure, or airflow rate de- [7-3-3 Error Code [1302] (during operation)] crease due to clogging of the heat exchanger The fan is not properly controlled as the outdoor temperature cannot be precisely detected by the...

  • Page 199: Units In The Heating Mode Do Not Operate At Expected Capacity

    [8-3 Refrigerant Control Problems ] 8-3-2 Units in the Heating Mode Do Not Operate at Expected Capacity. 1. Phenomena Although heating operation starts with the normal remote controller display, the capacity is not enough. 2. Cause, check method and remedy Cause Check method and remedy Compressor frequency does not rise sufficiently.
  • Page 200 [8-3 Refrigerant Control Problems ] Cause Check method and remedy Indoor unit LEV malfunction Refer to the following page(s). [8-8 Troubleshooting Insufficient refrigerant flows due to LEV malfunction LEV Problems] (not enough opening). Temperature reading error on the indoor unit piping Check the thermistor.

  • Page 201: Outdoor Units Stop At Irregular Times

    [8-3 Refrigerant Control Problems ] 8-3-3 Outdoor Units Stop at Irregular Times. 1. Phenomena Outdoor unit stops at times during operation. 2. Cause, check method and remedy Cause Check method and remedy The first stop is not considered as an error, as the Check the mode operated in the past by displaying unit turns to anti-restart mode for 3 minutes as a pre- preliminary error history on LED display with SW4.

  • Page 202: Checking Transmission Waveform And For Electrical Noise Interference

    [8-4 Checking Transmission Waveform and for Electrical Noise Interference ] Checking Transmission Waveform and for Electrical Noise Interference 8-4-1 M-NET Control is performed by exchanging signals between the outdoor unit and the indoor unit (ME remote controller) through M- NET transmission. Noise interference on the transmission line will interrupt the normal transmission, leading to erroneous op- eration.
  • Page 203 [8-4 Checking Transmission Waveform and for Electrical Noise Interference ] (3) Check method and remedy 1) Measures against noise Check the followings when noise exists on the wave or the errors described in (1) occur. Error code definition Remedy Check that the wiring 1.

  • Page 204: Ma Remote Controller

    [8-4 Checking Transmission Waveform and for Electrical Noise Interference ] 8-4-2 MA Remote Controller The communication between the MA remote controller and the indoor unit is performed with current tone burst. (1) Symptoms caused by noise interference on the transmission line If noise is generated on the transmission line, and the communication between the MA remote controller and the indoor unit is interrupted for 3 minutes in a row, MA transmission error (6831) will occur.

  • Page 205: Pressure Sensor Circuit Configuration And Troubleshooting Pressure Sensor Problems

    [8-5 Pressure Sensor Circuit Configuration and Troubleshooting Pressure Sensor Problems ] Pressure Sensor Circuit Configuration and Troubleshooting Pressure Sensor Problems 8-5-1 Comparing the High-Pressure Sensor Measurement and Gauge Pressure By configuring the digital display setting switch (SW4 (when SW6-10 is set to OFF)) as shown in the figure below, the pressure as measured by the high-pressure sensor appears on the LED1 on the control board.

  • Page 206: High-Pressure Sensor Configuration (63Hs1)

    [8-5 Pressure Sensor Circuit Configuration and Troubleshooting Pressure Sensor Problems ] 8-5-2 High-Pressure Sensor Configuration (63HS1) The high pressure sensor consists of the circuit shown in the figure below. If DC 5V is applied between the red and the black wires, voltage corresponding to the pressure between the white and the black wires will be output, and the value of this voltage will be converted by the microcomputer.

  • Page 207: Comparing The Low-Pressure Sensor Measurement And Gauge Pressure

    [8-5 Pressure Sensor Circuit Configuration and Troubleshooting Pressure Sensor Problems ] 8-5-3 Comparing the Low-Pressure Sensor Measurement and Gauge Pressure By configuring the digital display setting switch (SW4 (when SW6-10 is set to OFF)) as shown in the figure below, the pressure as measured by the low-pressure sensor appears on the LED1 on the control board.

  • Page 208: Low-Pressure Sensor Configuration (63Ls)

    [8-5 Pressure Sensor Circuit Configuration and Troubleshooting Pressure Sensor Problems ] 8-5-4 Low-Pressure Sensor Configuration (63LS) The low pressure sensor consists of the circuit shown in the figure below. If DC5V is applied between the red and the black wires, voltage corresponding to the pressure between the white and the black wires will be output, and the value of this voltage will be converted by the microcomputer.

  • Page 209: Troubleshooting Solenoid Valve Problems

    [8-6 Troubleshooting Solenoid Valve Problems ] Troubleshooting Solenoid Valve Problems Check whether the output signal from the control board and the operation of the solenoid valve match. Setting the self-diagnosis switch (SW4) as shown in the figure below causes the ON signal of each relay to be output to the LED's. Each LED shows whether the relays for the following parts are ON or OFF.
  • Page 210 [8-6 Troubleshooting Solenoid Valve Problems ] (3) SV1a (Bypass valve) This solenoid valve opens when powered (Relay ON). 1) At compressor start-up, the SV1a turns on for 4 minutes, and the operation can be checked by the self-diagnosis LED display and the closing sound.

  • Page 211: Troubleshooting Outdoor Unit Fan Problems

    [8-7 Troubleshooting Outdoor Unit Fan Problems ] Troubleshooting Outdoor Unit Fan Problems (1) Fan motor (common items) To check the revolution of the fan, check the inverter output state on the self-diagnosis LED, as the inverter on the outdoor fan controls the revolutions of the fan. When starting the fan, the fan runs at full speed for 5 seconds.

  • Page 212: Troubleshooting Lev Problems

    [8-8 Troubleshooting LEV Problems ] Troubleshooting LEV Problems 8-8-1 General Overview on LEV Operation LEV (Linear expansion valve) are stepping-motor-driven valves that operate by receiving the pulse signals from the indoor and outdoor unit control boards. (1) Indoor LEV and Outdoor LEV (LEV2) The valve opening changes according to the number of pulses.
  • Page 213 [8-8 Troubleshooting LEV Problems ] 3) Pulse signal output and valve operation Output pulses change in the following orders when the Output Output state Valve is closed; 1 (phase) number Valve is open; *1. When the LEV opening angle does not change, all the output phases will be off.
  • Page 214 [8-8 Troubleshooting LEV Problems ] (2) Outdoor LEV (LEV1, LEV4, LEV9) The valve opening changes according to the number of pulses. 1) Connections between the outdoor control board and LEV1 (outdoor expansion valve) Outdoor control board DC 12V Brown Drive circuit Blue Orange Yellow...

  • Page 215: Possible Problems And Solutions

    [8-8 Troubleshooting LEV Problems ] 8-8-2 Possible Problems and Solutions The specifications of the outdoor unit (outdoor LEV) and the indoor unit (indoor LEV) differ. Therefore, remedies for each fail- ure may vary. Check the remedy specified for the appropriate LEV as indicated in the below column. Malfunction Judgment method Remedy...

  • Page 216: Coil Removal Instructions

    [8-8 Troubleshooting LEV Problems ] 8-8-3 Coil Removal Instructions (1) Outdoor unit LEV (LEV1, LEV4, LEV9) 1) LEV component As shown in the figure, the outdoor LEV is made in such a way that the coils and the body can be separated. Body Coils Stopper...
  • Page 217 [8-8 Troubleshooting LEV Problems ] (2) Outdoor unit LEV (LEV2a, LEV2b) 1) Components The outdoor unit LEV consists of a coil and a valve body that can be separated from each other. Body Stopper Coil Lead wire 2) Removing the coil Securely hold the LEV at the bottom (Part A in the figure), and turn the coil.

  • Page 218: Troubleshooting Inverter Problems

    [8-9 Troubleshooting Inverter Problems ] Troubleshooting Inverter Problems 8-9-1 Inverter-Related Problems and Solutions Replace only the compressor if only the compressor is found to be defective. (Overcurrent will flow through the inverter if the compressor is damaged, however, the power supply is automatically cut when overcurrent is detected, protecting the inverter from damage.
  • Page 219 [8-9 Troubleshooting Inverter Problems ] Error display/failure condition Measure/inspection item Inverter related errors Implement solutions that correspond to the error codes or preliminary 4250, 4255, 4256, 4220, 4225, 4226, 4230, 4240, 4260, 5301, error codes. Refer to the following page(s). [7-1 Error Code and Prelim- 5305, 5306, 0403 inary Error Code Lists] Main power breaker trip...

  • Page 220: Checking The Inverter Board Error Detection Circuit

    [8-9 Troubleshooting Inverter Problems ] 8-9-2 Checking the Inverter Board Error Detection Circuit Items to be checked Phenomena Remedy Stop the unit. Overcurrent error Replace the INV board. Remove power supply. Error code: 4250 Detail code: No. 101, 104, 105, 106, and Disconnect the inverter Logic error Replace the INV board.

  • Page 221: Checking The Inverter For Damage At No-Load

    [8-9 Troubleshooting Inverter Problems ] 8-9-4 Checking the Inverter for Damage at No-Load Items to be checked Phenomena Remedy Stop the unit. Inverter-related problems are detected. Set SW7-1 on the MAIN board to ON, Remove power supply. and go to [8-9-2 Checking the Inverter Board Error Detection Circuit].

  • Page 222: Checking The Inverter For Damage During Compressor Operation

    [8-9 Troubleshooting Inverter Problems ] 8-9-5 Checking the Inverter for Damage during Compressor Operation Items to be checked Phenomena Remedy Put the outdoor unit into opera- Overcurrent-related problems occur im- Check items [8-9-2 Checking the tion. mediately after compressor startup. Inverter Board Error Detection Cir- Check the inverter output volt- Error code : 4250...

  • Page 223: Checking The Fan Motor For Ground Fault And Coil Resistance Problems

    [8-9 Troubleshooting Inverter Problems ] 8-9-6 Checking the Fan Motor for Ground Fault and Coil Resistance Problems Items to be checked Phenomena Remedy Remove fan motor winding. Check Fan motor insulation failure. Change fan motor. insulation resistance and coil resis- If <...

  • Page 224: Checking The Fan Board For Damage At No Load

    [8-9 Troubleshooting Inverter Problems ] 8-9-8 Checking the Fan Board for Damage at No Load Items to be checked Phenomena Remedy Stop the unit. An error other than the current sen- Replace the fan board. Turn off the breaker. sor error (5305, 5306 Detail code *Be sure to turn off the power.

  • Page 225: Checking The Fan Board For Damage With Load

    [8-9 Troubleshooting Inverter Problems ] 8-9-9 Checking the Fan Board for Damage with Load Items to be checked Phenomena Remedy Turn off breaker. The operation stops within 20 seconds Check for fan motor lock. of startup and a step-out error or an →If locked, change for fan motor.

  • Page 226: Checking The Installation Conditions

    [8-9 Troubleshooting Inverter Problems ] 8-9-10 Checking the Installation Conditions Items to be checked Phenomena Remedy Check refrigerant charge. Overcharge of refrigerant Return to correct refrigerant charge. Check outdoor unit branch in- The branch approach <500 mm. Make branch approach >500mm stallation.

  • Page 227: Solutions For The Main Earth Leakage Breaker Trip

    [8-9 Troubleshooting Inverter Problems ] 8-9-12 Solutions for the Main Earth Leakage Breaker Trip Measure the secondary voltage of the main power earth leakage breaker before checking because the main power earth leak- age breaker may have been broken. Items to be checked Phenomena Remedy Check the earth leakage breaker...

  • Page 228: Simple Check On Inverter Circuit Components

    [8-9 Troubleshooting Inverter Problems ] 8-9-13 Simple Check on Inverter Circuit Components Turn off the power to the unit, and leave it turned off for at least 10 minutes. Check that the voltage across pins 1 (+) and 5 (-) of the connector RYPN1 is 20 VDC or less before removing components from the control box. Part name Judgment method IGBT module...

  • Page 229: Troubleshooting Problems With Igbt Module

    [8-9 Troubleshooting Inverter Problems ] 8-9-14 Troubleshooting Problems with IGBT Module Measure the resistances between each pair of terminals on the IGBT with a tester, and use the results for troubleshooting. The terminals on the INV board are used for the measurement. 1) Notes on measurement Check the polarity before measuring.
  • Page 230 [8-9 Troubleshooting Inverter Problems ] <INV42Y> Reference resistance value Black (+) SC-P CN-N SC-L1 SC-L2 SC-L3 SC-P 5-200 Ω 5-200 Ω 5-200 Ω CN-N ∞ ∞ ∞ Red (-) SC-L1 ∞ 5-200 Ω SC-L2 ∞ 5-200 Ω SC-L3 ∞ 5-200 Ω Black (+) SC-P1 CN-N...

  • Page 231: Checking The Fan Inverter Heatsink For Clogging

    [8-9 Troubleshooting Inverter Problems ] 8-9-15 Checking the Fan Inverter Heatsink for Clogging Check the fan inverter heatsink for clogging by removing part of the duct and checking inside the duct. To remove the duct, follow the procedures 1) through 2) below. Reassemble the components in the reverse order as they were removed.

  • Page 232: 8-10 Control Circuit

    [8-10 Control Circuit ] 8-10 Control Circuit 8-10-1 Control Power Supply Function Block Power supply system (380-415 VAC) Control system (5-30 VDC) Noise filter board Inverter board Capacitor board Noise filter Compressor Rectifier Smoothing capacitor Inverter AC Power source (380-415 V) Fuse Fuse Power-supply...

  • Page 233: Troubleshooting Problems With Outdoor Unit Transmission Power Supply Circuit

    [8-10 Control Circuit ] 8-10-2 Troubleshooting Problems with Outdoor Unit Transmission Power Supply Circuit Check the voltage at the indoor/outdoor transmission terminal block (TB3) of outdoor unit. Check whether the transmission line is disconnected, 24-30 VDC check for contact failure, and repair the problem. Check the voltage at TB3 after removing transmission line from TB3.
  • Page 234 [8-10 Control Circuit ] Check for conductivity between TB12 and pin 1 of CN1 and between TB14 and pin 3 of CN1. Is there conductivity between them? Replace the noise filter board. Check the wiring between the noise filter board and TB1 of power-supply board, and also check connectors L2-N of TB1, TB12, and TB14.

  • Page 235: 8-11 Measures For Refrigerant Leakage

    [8-11 Measures for Refrigerant Leakage ] 8-11 Measures for Refrigerant Leakage 1. Leak spot: In the case of extension pipe for indoor unit or optional unit (Cooling season) 1) Mount a pressure gauge on the service check joint (CJ2) on the low-pressure side. 2) Stop all the indoor units, and close the liquid service valve (BV2) inside the outdoor unit while the compressor is stopped.
  • Page 236 [8-11 Measures for Refrigerant Leakage ] (8) After repairing the leak, replace the dryer with the new one, and perform evacuation inside the outdoor unit and optional unit. (9) To adjust refrigerant amount, open the service valves (BV1 and BV2 when optional unit is in- stalled) inside the outdoor unit.

  • Page 237: 8-12 Parts Replacement Instructions

    [8-12 Parts Replacement Instructions ] 8-12 Parts Replacement Instructions 8-12-1 Ensuring Maintenance Space (Preparation for the Maintenance of Refrigerant Circuit Parts) 1. L-module (1) Remove the front panel from the unit by unscrewing the 14 screws. (See Figure 1.) *Figure 1 shows the unit without the front panel.

  • Page 238: Notes On Wiring Installation

    [8-12 Parts Replacement Instructions ] 8-12-2 Notes on Wiring Installation If wiring was disconnected during maintenance, reconnect the wiring as follows. Isolate the strong and the weak electrical wiring to avoid noise interference. (1) L-module FRONT VIEW PILLAR C CONTROL BOX Fix the wires in place with cable straps.
  • Page 239 [8-12 Parts Replacement Instructions ] 8-12-3 Four-way Valve and Check Valve Replacement Procedure 1. L-module (four-way valve (21S4a)) Explained below is the procedure for replacing four-way valve (21S4a) (on the right when seen from the front of the unit). Secure sufficient work space before starting maintenance work. (See 8-12-1 Ensuring Maintenance Space (Preparation for the Maintenance of Refrigerant Circuit Parts).) (1) Remove the top compressor cover by unscrewing the three screws.
  • Page 240 [8-12 Parts Replacement Instructions ] (6) Remove the plastic cover and the coil holding the four-way valve. (See Figure 6.) Four-way valve coil A Figure 6 *Notes on replacing refrigerant circuit components (check valve, four-way valve, solenoid valve, and LEV) Be sure to perform non-oxidized brazing.
  • Page 241 [8-12 Parts Replacement Instructions ] (10A) Remove the pipe below four-way valve (21S4a) and on the front by removing the braze at the four areas shown in Figure 10. After being removed, leave the pipes at the bottom inside the unit. (Once removed from the unit, it will be Remove the rubber spacer.
  • Page 242 [8-12 Parts Replacement Instructions ] (13A) Remove four-way valve (21S4a) by removing the braze from the area above four-way valve (21S4a) as shown in Figure Figure 13 (14A) Mount a new four-way valve (21S4a). Figure 14 shows how to position a new four-way valve. When seen from above, four-way valves (21S4a and 21S4b) are tilted by 15°.
  • Page 243 [8-12 Parts Replacement Instructions ] (17A) Mount four-way valve (21S4a) to the pipe below four-way valve A and in the middle by brazing at the three areas. (See Figure 17.) Figure 17 (18A) Mount four-way valve (21S4a) to the pipe below four-way valve (21S4a) and on the front by brazing at the four areas. (See Figure 18.) Reinstall these pipes.
  • Page 244 [8-12 Parts Replacement Instructions ] 2. L-module (four-way valve (21S4b)) Explained below is the procedure for replacing four-way valve (21S4b) (on the left when seen from the front of the unit). Secure sufficient work space before starting maintenance work. (See 8-12-1 Ensuring Maintenance Space (Preparation for the Maintenance of Refrigerant Circuit Parts).) (19B) Follow the same procedures ((1) through (7), (8A), and (11A)) for replacing four-way valve (21S4a).
  • Page 245 [8-12 Parts Replacement Instructions ] (23B) Mount four-way valve (21S4b) to the pipe below four-way valve (21S4b) and in the middle. A total of five areas require brazing, including the area indicated in (22B) and the areas indicated in Figure 22. Mount four-way valve (21S4b) horizontal to four-way valve (21S4a) as shown in (14A).
  • Page 246 [8-12 Parts Replacement Instructions ] 3. Replacing check valve (CV1) (L module) Follow the procedures below to remove check valve (CV1) located in the back of the four-way valve. (1) Follow the steps (1) through (8A) under item 1. L-module under 8-12-3 Four-way Valve and Check Valve Replacement Procedure to create access to check valve (CV1).
  • Page 247 [8-12 Parts Replacement Instructions ] 8-12-4 Compressor Replacement Procedure 1. PUHY-HP200, 250YNW-A Explained below are the procedures for replacing the compressor. Secure sufficient work space before starting replacement work. (See 8-12-1 Ensuring maintenance space (Preparation for the Maintenance of Refrigerant Circuit Parts).) (1) Remove the top compressor cover by unscrewing the three screws.
  • Page 248 [8-12 Parts Replacement Instructions ] (8) Remove the pipe cover and the damper, and cut the suction pipe where indicated in Figure 8. * When re-placing the pipe cover and the dumper, use the ones with the sizes shown in Figure 8, which are supplied with the replacement compressor.

  • Page 249: Removal Instructions For The Control Box

    [8-12 Parts Replacement Instructions ] 8-12-5 Removal Instructions for the Control Box 1. L module [Removing the duct] Unscrew the two screws indicated with arrows in Figure 1-a, and pull up the duct to remove it. (Figure 1-b shows the unit after the duct was removed.) [Figure 1-a] [Figure 1-b] [Figure 1]...
  • Page 250 [8-12 Parts Replacement Instructions ] 8-12-6 Maintenance Procedure for the Drain Pan 1. L-module [Drain pan removal procedure] (1) Remove the front panel from the unit by unscrewing the 14 screws. (See Figure 1.) (2) Remove the fin guard and the center pillar by unscrewing the 11 screws shown in Figure 2. Remove the cable straps from the center pillar.
  • Page 251 [8-12 Parts Replacement Instructions ] [Drain pan mounting procedure] *Reuse the drain pan mounting screws from the replaced drain pan. (M5 x 16 mm with a nylon washer) (1) Screw down the drain pan with two screws. (See Figure 7.) (2) Hold the check joints to the drain pan with two rod holders.

  • Page 252: Maintenance Procedures For The Heat Exchanger

    [8-12 Parts Replacement Instructions ] 8-12-7 Maintenance Procedures for the Heat Exchanger 1. L-module Rear heat exchanger Front of the unit Front heat exchanger Figure 1 (1) Remove the two front panels from the unit by unscrewing the 14 screws. (See Figure 2.) (2) Remove the fin guard by unscrewing the 12 screws.
  • Page 253 [8-12 Parts Replacement Instructions ] (9) Remove the fan guard by unscrewing the 12 screws. (See Figure 7.) (10) Insert a spacer between the control box and the heat exchanger. (11) Remove the motor ASSY by unscrewing the 8 screws, using caution not to damage the motor wiring or the fan. (See Figure 8.) Fan guard Motor ASSY...
  • Page 254 [8-12 Parts Replacement Instructions ] (15) To remove the front heat exchanger, first remove the front, left, right, and center frames by unscrewing the 14 screws. (See Figure 11.) To remove the rear heat exchanger, remove the rear frame in addition to the front, left, right, and center frames by unscrewing the 16 screws.
  • Page 255 [8-12 Parts Replacement Instructions ] (19) Before removing the front heat exchanger, protect the adjacent electrical components and the pipe covers with the recommended felt that is soaked in water, and then remove the braze from the areas shown in Figure 13. (4 areas) To remove the rear heat exchanger, remove the braze from four areas.
  • Page 256 [8-12 Parts Replacement Instructions ] (20) To remove the front heat exchanger, loosen the screws on the right side of the right rear pillar. (4 screws) (See Figure 15.) To remove the rear heat exchanger, loosen the screws on the back of the right rear pillar. (4 screws) (See Figure 16.) Remove the screw holding the pillar to the rear heat exchanger support.
  • Page 257 [8-12 Parts Replacement Instructions ] (22) After removing the heat exchangers, dispose of the front and the rear heat exchanger supports. (See Figures 19 and 20.) The front and the rear heat exchanger supports do not need to be installed. (The front and the rear heat exchanger supports are for suppressing vibration during transportation.) Center pillar Front heat exchanger...
  • Page 258 [8-12 Parts Replacement Instructions ] 8-12-8 Accumulator Replacement Procedure 1. L-module (1) Remove the front heat exchanger. Refer to 8-12-7 Maintenance Procedures for the Heat Exchanger for details. (2) Remove the top, front, and right compressor covers. Refer to 8-12-4 Compressor Replacement Procedure for details. (3) Remove the duct from the control box.
  • Page 259 [8-12 Parts Replacement Instructions ] (7) Remove the braze at the four areas on the accumulator inlet and outlet pipes shown in Figure 5. Inlet pipe Outlet pipe L-module outlet pipe Figure 5 (8) Re-place the accumulator in the reverse order as it was removed. Re-place the components that were removed as they were.

  • Page 260: Troubleshooting Problems Using The Led Status Indicators On The Outdoor Unit

    [8-13 Troubleshooting Problems Using the LED Status Indicators on the Outdoor Unit ] 8-13 Troubleshooting Problems Using the LED Status Indicators on the Outdoor Unit If the LED error display appear as follows while all the SW4 switches and SW6-10 are set to OFF, check the items under the ap- plicable item numbers below.

  • Page 261: 8-14 4250 Troubleshooting

    [8-14 4250 Troubleshooting ] 8-14 4250 Troubleshooting 1. 4250 Troubleshooting flowchart Check the outdoor unit for proper operation. Stopped abnormally Unit operation In operation Restart the unit. Acquisition of error history Is the unit operable? and pre-error data (Reference materials) Action Abnormal Replace the...
  • Page 262 [8-14 4250 Troubleshooting ] Items to be checked when refrigerant flood- Items to be checked when refrigerant flood- Judgement Judgement back occurred in the Cooling mode back occurred in the Heating mode Check the total refrigerant charge. Check the Check the total refrigerant charge. Check the piping system configuration and the total piping system configuration and the total amount of refrigerant.
  • Page 263 [8-14 4250 Troubleshooting ] - chapter 8 BS_08_M...

  • Page 264: Chapter 9 Usb Function

    Chapter 9 USB Function Service Overview ..........................1 9-1-1 Function Overview ..........................1 9-1-2 System Structure ............................ 2 9-1-3 Necessary Materials ..........................4 Operation Data Collection and Storage Functions................5 9-2-1 Preparation ............................. 5 9-2-2 Storing Data on a USB Memory Stick..................... 5 9-2-3 Collecting Operation Data........................
  • Page 265 GB_BS_09_G...

  • Page 266: Service Overview

    [9-1 Service Overview ] Service Overview 9 USB Function 9-1-1 Function Overview The control board has a USB port that allows the use of the following two functions. 1. Collection and storage of operation data Operation information from indoor units, outdoor units, and other equipment and devices in the system are collected andstored in the flash memory in the control board of the outdoor unit (OC).

  • Page 267: System Structure

    [9-1 Service Overview ] 9-1-2 System Structure (1) Control board on the outdoor unit CN601 SWP3 Push switch (Function setting) Dip switch SW7-9 SW6-10 LED301 Maintenance LED CNUSB USB memory connector - chapter 9 BS_09_G...

  • Page 268: Necessary Materials

    [9-1 Service Overview ] 9-1-3 Necessary Materials The use of the USB function requires a USB memory stick and a portable battery charger. See below for the types of USB memory stick and portable charger that can be used. (1) USB memory stick Use a USB memory stick that meets the following specifications.

  • Page 269: Operation Data Collection And Storage Functions

    [9-2 Operation Data Collection and Storage Functions ] Operation Data Collection and Storage Functions Operation data of the units collected on the outdoor unit can be recorded in the flash memory of the control board. These data can also be exported to and recorded in a USB memory stick. See Section [9-2-2 Storing Data on a USB Memory Stick] for information on storing data on a USB memory stick.
  • Page 270 [9-2 Operation Data Collection and Storage Functions ] [Method 2] Storing data on a USB memory stick with the main power to the outdoor unit (OC) turned on <Starting up the unit in the data storage mode> Stop the operation of all indoor units. Connect a USB memory stick to the USB port (CNUSB) on the control board of the outdoor unit (OC).

  • Page 271: Collecting Operation Data

    [9-2 Operation Data Collection and Storage Functions ] 9-2-3 Collecting Operation Data This function is used to collect the operation data of the outdoor and indoor units via M-NET, and record the data in the flash memory on the control board. When the memory is full, it is overwritten from the first segment. The settings for checking the status of operation data collection, for starting/ending data collection, and for continuing/stop- ping error-data collection are made, using the switches on the control board.

  • Page 272: Precautions

    [9-2 Operation Data Collection and Storage Functions ] 9-2-4 Precautions For dealing with display on the maintenance LED and other problems, refer to Section [9-4 Maintenance LED Display and Troubleshooting]. 1. Storage of data in a USB memory stick Take extra care regarding electric shock during the work on the control board, such as the insertion of the USB memory stick. Before starting in Normal Mode, remove the USB memory stick from the control board.

  • Page 273: Software Rewrite Function On The Usb

    [9-3 Software Rewrite Function on the USB ] Software Rewrite Function on the USB The USB memory stick may be used to rewrite the software of the outdoor unit in the same way as using a ROM writer. 9-3-1 Preparation Prepare a USB memory stick and a portable battery charger.

  • Page 274: Precautions

    [9-3 Software Rewrite Function on the USB ] 9-3-3 Precautions For dealing with the displays shown on the maintenance LED and other problems, refer to Section [9-4 Maintenance LED Display and Troubleshooting] Take care to choose the correct countermeasure program for the intended model and version. Store only one software rewrite program on the USB memory stick.

  • Page 275: Maintenance Led Display And Troubleshooting

    [9-4 Maintenance LED Display and Troubleshooting ] Maintenance LED Display and Troubleshooting 9-4-1 Maintenance LED Display Content List The following table shows the maintenance LED displays for each function. When dealing with the errors shown on the display, refer to Section [9-4-2 Troubleshooting] 1.
  • Page 276 [9-4 Maintenance LED Display and Troubleshooting ] 2. Collecting operation data Switch Meaning Maintenance LED Display Description “ON” OC is collecting operation da- ta. A blinking display indicates that data collection is temporarily sus- Collection in progress pended. No switch setting is neces- sary.
  • Page 277 [9-4 Maintenance LED Display and Troubleshooting ] 3. Rewriting software Switch Meaning Maintenance LED Display Description “PRO” Software rewrite mode is ac- tive. Software rewrite is enabled. See Section [9-4-2 Troubleshoot- Rewrite Mode activated ing]3-(1), 3-(2) and 3- (3). Software rewrite is in progress. Bars are displayed in turn.

  • Page 278: Troubleshooting

    [9-4 Maintenance LED Display and Troubleshooting ] 9-4-2 Troubleshooting Troubleshooting of USB functions are shown below. The displays on the maintenance LED described in Section [9-4-1 Maintenance LED Display Content List]may also be used as a reference. 1. Storing on a USB memory stick (1) Maintenance LED does not display "USB."...
  • Page 279 [9-4 Maintenance LED Display and Troubleshooting ] (5) Maintenance LED displays "Er10." (Meaning or Cause) Because there was a problem regarding the control board during data storage, data storage is unfinished. (Solution) Perform data storage again. Remove the USB memory stick from the control board and insert it again. Then conduct data storage using Section [9-2-2 Storing Data on a USB Memory Stick]as a reference.
  • Page 280 [9-4 Maintenance LED Display and Troubleshooting ] 3. Rewriting software (1) Maintenance LED does not display "Pro." (Meaning or Cause) The system is not started in Software Rewrite Mode. Switches SW7-9 on the control board may not be in the ON position, or the portable charger may not be charged sufficiently. (Solution) Make sure switches SW7-9 are ON using Section [9-3-2 Rewriting Software]as a reference.
  • Page 281 [9-4 Maintenance LED Display and Troubleshooting ] (5) Maintenance LED displays "Er02." (Meaning or Cause) Software rewrite is suspended due to a problem with the USB memory stick during the software rewrite process. For example, if the USB memory stick is disconnected during data storage, this display appears on the maintenance LED. (Solution) Check the connection of the USB memory stick.
  • Page 282 Chapter 10 LED Status Indicators on the Outdoor Unit Circuit Board 10-1 LED Status Indicators........................... 1 10-1-1 How to Read the LED ..........................1 10-1-2 Initial LED Display........................... 2 10-1-3 Clock Memory Function .......................... 3 10-2 LED Status Indicators Table ........................ 4 GB_BS_10_L...
  • Page 283 GB_BS_10_L...

  • Page 284: Led Status Indicators

    [10-1 LED Status Indicators ] 10-1 LED Status Indicators 10 LED Status Indicators on the Outdoor Unit Circuit Board 10-1-1 How to Read the LED By setting the DIP SW 4-1 through 4-10 (Set SW6-10 to OFF.)(Switch number 10 is represented by 0), the operating condition of the unit can be monitored on the service monitor.
  • Page 285 [10-1 LED Status Indicators ] 10-1-2 Initial LED Display From power on until the completion of initial settings, the following information will be displayed on the monitor screen. (Displays No. 1 through No. 4 in order repeatedly.) Item Display Remarks Software version [0103] : Version 1.03 Refrigerant type...
  • Page 286 [10-1 LED Status Indicators ] 10-1-3 Clock Memory Function The outdoor unit has a simple clock function that enables the unit to calculate the current time with an internal timer by receiv- ing the time set by the system controller, such as AG-150A. If an error (including a preliminary error) occurs, the error history data and the error detection time are stored into the service memory.
  • Page 287 [10 - 2 LED Status Indicators Table] - chapter 10 BS_10_L...
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  • Page 310 Service Handbook Model PUHY-HP200, HP250YNW-A PUHY-HP400, HP500YSNW-A www.MitsubishiElectric.com New publication effective Oct. 2021 Specifications subject to change without notice HWE21030...

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