Mitsubishi Electric CRHV-P600YA-HPB Service Handbook
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Mitsubishi Electric CRHV-P600YA-HPB Service Handbook

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  • Page 2 Indicates a risk of injury or structural damage Indicates a risk of damage to the unit or other components in the system IMPORTANT All electric work must be performed by personnel certified by Mitsubishi Electric. General WARNING To reduce the risk of burns or frost bites, do not touch the...
  • Page 3 To reduce the risk of injury, do not sit, stand, or place objects The water heated by the heat pump is not suitable for on the unit. use as drinking water or for cooking. It may cause health problems or degrade food. Do not connect the makeup water pipe directly to the potable water pipe.
  • Page 4 Any additional parts must be installed by qualified personnel. The unit should be installed only by personnel certified Only use the parts specified by Mitsubishi Electric. by Mitsubishi Electric according to the instructions detailed in the Installation/Operation Manual. Take appropriate safety measures against wind gusts and...
  • Page 5 CAUTION To reduce the risk of current leakage, wire breakage, smoke, To reduce the risk of electric shock, shorting, or malfunctions, or fire, keep the wiring out of contact with the refrigerant keep wire pieces and sheath shavings out of the terminal pipes and other parts, especially sharp edges.

  • Page 6: Table Of Contents

    CONTENTS I Read Before Servicing [1] Read Before Servicing......................3 [2] Necessary Tools and Materials ....................4 [3] Brazing............................5 [4] Air Tightness Test........................6 [5] Vacuum Drying (Evacuation) ....................7 [6] Refrigerant Charging ........................ 8 [7] Remedies to be taken in case of a Refrigerant Leak..............8 [8] Characteristics of the Conventional and the New Refrigerants ..........
  • Page 7 CONTENTS HWE1312A...
  • Page 8 I Read Before Servicing [1] Read Before Servicing ....................... 3 [2] Necessary Tools and Materials..................4 [3] Brazing..........................5 [4] Air Tightness Test ......................6 [5] Vacuum Drying (Evacuation) ..................... 7 [6] Refrigerant Charging......................8 [7] Remedies to be taken in case of a Refrigerant Leak ............8 [8] Characteristics of the Conventional and the New Refrigerants .........
  • Page 9 - 2 - HWE1312A...

  • Page 10: Read Before Servicing

    1. Check the type of refrigerant used in the system to be serviced. Refrigerant Type Hot water Heat pump CRHV-P600YA-HPB:R410A 2. Check the symptoms exhibited by the unit to be serviced. Refer to this service handbook for symptoms relating to the refrigerant cycle.

  • Page 11: Necessary Tools And Materials

    [ I Read Before Servicing ] [2] Necessary Tools and Materials Prepare the following tools and materials necessary for 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 12: Brazing

    [ I Read Before Servicing ] [3] Brazing No changes have been made in the brazing procedures. Perform brazing with special care to keep foreign objects (such as oxide scale, water, and dust) out of the refrigerant system. Example: Inside the brazed connection Use of oxidized solder for brazing Use of non-oxidized solder for brazing 1.

  • Page 13: Air Tightness Test

    [ I Read Before Servicing ] [4] Air Tightness Test No changes have been made in the detection method. 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), and then judge the equipment's air tightness, taking temperature variations into account.

  • Page 14: Vacuum Drying (Evacuation)

    [ I Read Before Servicing ] [5] Vacuum Drying (Evacuation) (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 15: Refrigerant Charging

    [ I Read Before Servicing ] [6] 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 Charge refrigerant through the Charging refrigerant through the check joint on the high-pressure side.

  • Page 16: Characteristics Of The Conventional And The New Refrigerants

    [ I Read Before Servicing ] [8] Characteristics of the Conventional and the New Refrigerants 1. Chemical property As with R22, the new refrigerant (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 17: Notes On Refrigerating Machine Oil

    [ I Read Before Servicing ] [9] Notes on Refrigerating Machine 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. Refrigerant Refrigerating machine oil Mineral oil...

  • Page 18: Restrictions

    II Restrictions [1] System Configuration....................... 13 [2] Types and Maximum allowable Length of Cables ............14 [3] Main Power Supply Wiring and Switch Capacity ............. 15 [4] Sample Installation......................18 [5] Switch Types and the Factory Settings................19 [6] Configuring the Settings....................20 [7] Water Pipe Installation .....................
  • Page 19 - 12 - HWE1312A...

  • Page 20: System Configuration

    [ II Restrictions ] II Restrictions [1] System Configuration The system must be configured only by personnel certified by Mitsubishi Electric. 1 Schematic Diagrams of Individual and Multiple Systems (1) Individual system * Each unit is operated individually by connecting a dry contact switch/relay to each unit.

  • Page 21: Types And Maximum Allowable Length Of Cables

    [ II Restrictions ] [2] 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. 2) Install external transmission cables at least 5cm [1-31/32"] away from the power supply cable to avoid noise interference. (Do not put the control cable and power supply cable in the same conduit tube.) 3) Provide grounding for the unit as required.

  • Page 22: Main Power Supply Wiring And Switch Capacity

    Current leakage breaker No-fuse breaker (A) System Impedance y t i CRHV-P600YA-HPB 75 A 100 mA 0.1 sec. or less 0.18 Ω 1. Use a dedicated power supply for each unit. Ensure that each unit is wired individually. 2. When installing wiring, consider ambient conditions (e.g., temperature).
  • Page 23 [ II Restrictions ] Control cable specifications ( ² Remote controller cable ( ² M-NET cable between units External input wire size Min. 0.3 mm² External output wire size 1.25 mm² *1 Use a CVVS or CPEVS cable (Max. total length of 200 m) if there is a source of electrical interference near by (e.g., factory) or the total length of control wiring exceeds 120 m.
  • Page 24 [ II Restrictions ] 1. Check that the spring washer is in a parallel position. * If the screw is biting into the washer, simply fastening the screw to the specified torque cannot determine whether it has been installed properly. Properly installed Loose screws Spring washer is in a parallel position...

  • Page 25: Sample Installation

    [ II Restrictions ] [4] Sample Installation The system must be configured only by pe rsonnel certified by Mitsubishi Electric. 1 Schematic Diagrams of Individual and Multiple Systems (1) Individual system * Each unit is operated individually by connecting a dry contact switch/relay to each unit.

  • Page 26: Switch Types And The Factory Settings

    [ II Restrictions ] [5] Switch Types and the Factory Settings (1) Switch names and functions Control box (Main circuit) Service panel Control box (Sub circuit) There are four main ways to set the settings as follows: Dip switches (SW1 - SW3) Dip switches used in combination with the push switches Rotary switches Slide switches...

  • Page 27: Configuring The Settings

    [ II Restrictions ] [6] Configuring the Settings The settings must be set only by a qualified personnel. <1> Making the settings Use the LED display and the three push switches (SWP1 (↑), SWP2 (↓), and SWP3 (Enter)) to change the current settings on the circuit board and to monitor various monitored values.
  • Page 28 [ II Restrictions ] (2) Table of settings items Set the dip switches SW2 and SW3 as shown in the table below to set the value for the items in the "Setting item" column. SW2 and SW3 settings Item Setting Item Code SW2-10 SW3-8...
  • Page 29 [ II Restrictions ] (3) System configuration procedures: Individual system 1. Set the dip switches on the MAIN circuit ) t i ) t i board. Switch settings on the MAIN circuit Set the dip switches (labeled A in the figure at right) that correspond to the items below, 10’s digit (0) 1’s digit (1) 10’s digit (5) 1’s digit (1)
  • Page 30 [ II Restrictions ] 4. Perform an initial setup. (MAIN circuit side) (1) Set the rotary switch SWU3 (labeled A in the figure at right) to "F." Unit (MAIN circuit) [EEEE] will appear in LED1 (labeled B in the figure at right). *1 (2) Press and hold the push switch (SWP3) (labeled C in the figure at right) for one second or longer.
  • Page 31 [ II Restrictions ] Setting the switches on all sub units Sub unit (MAIN circuit) Sub unit (SUB circuit) MAIN circuit (1) Set the dip switch SW2-9 to ON. (multiple unit control) (labeled A in the figure at right) (2) Set the MAIN circuit addresses with the rotary switches.
  • Page 32 [ II Restrictions ] 4. Perform an initial setup on the MAIN circuit on the main unit (1) Set the rotary switch SWU3 on the MAIN circuit on the main unit (labeled Main unit (MAIN circuit) A in the figure at right) to "F." [EEEE] will appear in LED1 (labeled B in the figure at right).
  • Page 33 [ II Restrictions ] (4) Re-initializing the system When the settings for the items below have been changed, the system will require re-initialization. • Dip switch SW2-8 (use or non-use of an external water temperature sensor) (Re-initialization is required only for the Multiple system.) •...

  • Page 34: Water Pipe Installation

    [ II Restrictions ] [7] Water Pipe Installation 1. Schematic Piping Diagram and Piping System Components Please build the hot water and heat source fluid circuit so that it is a closed system. Do not use hot water directly for showers or other applications.
  • Page 35 [ II Restrictions ] * Connect the heat source piping in reverse if the inlet temperature of heat source fluid is 27 °C or more. (heat source fluid inlet is lower side, outlet is upper side) Install the attached label as shown below if the heat source fluid is connected in reverse.
  • Page 36 [ II Restrictions ] 2. Water piping attachment method Applying sealant Apply some sealant to the coupling screws. When applying liquid sealant, use a brush. Do not let the liquid sealant peel off and reach into the water circuit during installation or operation.
  • Page 37 [ II Restrictions ] 3. Notes on pipe corrosion Water treatment and water quality control Poor-quality circulating water can cause the water-side heat exchanger to scale up or corrode, reducing heat- exchange performance. Properly control the quality of the circulating water. •...
  • Page 38 [ II Restrictions ] (5) Suspended solids in the water Sand, pebbles, suspended solids, and corrosion products in water can damage the heating surface of the heat exchanger and cause corrosion. Install a good quality strainer (20 mesh or better) at the inlet of the unit to filter out suspended solids.
  • Page 39 [ II Restrictions ] 4. Installing the strainer and flow switch (1) Installing the strainer Install a strainer on the inlet pipe near the unit to filter out suspended solids and prevent clogging or corrosion of the heat exchanger. Install a strainer in a way that allows for easy access for cleaning, and instruct the user to clean it regularly. Operating the units with a clogged strainer may cause the units to make an abnormal stop.
  • Page 40 ºC. Refer to the table below for the standard, minimum, and maximum flow rates. Unit: m Standard, Minimum, and Maximum flow rates Standard flow rate (50Hz) Minimum allowable flow Maximum allowable flow CRHV-P600YA-HPB rate rate Heating Hot water side 10.3 15.0...
  • Page 41 [ II Restrictions ] - 34 - HWE1312A...

  • Page 42: Unit Components

    III Unit Components [1] Unit Components and Refrigerant Circuit ................ 37 [2] Control Box of the Unit..................... 39 [3] Unit Circuit Board......................40 - 35 - HWE1312A...
  • Page 43 - 36 - HWE1312A...

  • Page 44: Unit Components And Refrigerant Circuit

    [ III Unit Components ] III Unit Components [1] Unit Components and Refrigerant Circuit 1. Unit Components Panel T Panel BU-PIPE 2 Panel assy L Panel BU-PIPE Panel BU Panel assy BB-PIPE Panel assy BB Panel assy FU Panel assy FB Panel R H screw - 37 -...
  • Page 45 [ III Unit Components ] 2. Refrigerant circuit Heat exchanger assy (Hot water side) Pressure sensor LP Pressure sensor HP Pressure switch assy Pressure switch assy Heat exchanger assy Thermistor (TH2) (Heat source side) Thermistor (TH5) Thermistor (TH13) Thermistor (TH1) Thermistor (TH6) Scroll compressor (MAIN) Thermistor (TH14)

  • Page 46: Control Box Of The Unit

    [ III Unit Components ] [2] Control Box of the Unit (1) Main circuit control box Rush current protection resister Control board INV board Capacitor DC reactor (DCL) Electromagnetic relay (52C) Noise filter Control terminal block 1 (TB5) Control terminal block 2 Terminal block (TB6) (TB1)

  • Page 47: Unit Circuit Board

    [ III Unit Components ] [3] Unit Circuit Board 1. Control board (MAIN board) CN 2 CN801 Serial communication Pressure switch signal input connection Output 17VDC CN 4 CNDC Bus voltage input Serial communication signal output LED4 Energization status (CPU) driving output CN3A Remote controller...
  • Page 48 [ III Unit Components ] 2. M-NET board CNS2 CNIT Transmission line input/output for 12VDC input CN04 centralized control system CN102 Bus voltage input 5VDC input Power supply output for centralized control system Power supply detection output Indoor/outdoor transmission line input/output Power supply ON/OFF Grounding signal input...
  • Page 49 [ III Unit Components ] 3. INV board SC-P1 Rectifier diode output (P) Open: No-load operation setting CN5V RSH1 SC-P2 Short-circuited: Normal setting Overcurrent detection LED1 Bus voltage Input(P) Lit: Inverter in normal operation 5VDC output resistor Blink: Inverter error CN43 GND(Control Board) Serial communication...
  • Page 50 [ III Unit Components ] 4. Noise Filter Output Output (Rectified L2-N current) (Rectified L2-N current) Surge absorber circuit Surge absorber circuit Short circuit Short circuit Grounding F1,F2,F3,F4 Fuse 250VAC 6.3A Output Grounding CN1A Input CN1B TB21 TB22 TB23 TB24 Input Input/output(L1) Input/output(L2)
  • Page 51 [ III Unit Components ] - 44 - HWE1312A...

  • Page 52: Remote Controller

    IV Remote Controller [1] Using the Remote Controller.................... 47 [2] Function Settings ......................52 - 45 - HWE1312A...
  • Page 53 - 46 - HWE1312A...

  • Page 54: Using The Remote Controller

    [ IV Remote Controller ] IV Remote Controller [1] Using the Remote Controller <1> Starting and Stopping Operation and To Stop Operation Changing the Operation Mode 1. Press the ON/OFF (BACK) button while the unit is in operation. The power indicator and the display will light off.
  • Page 55 [ IV Remote Controller ] <2> Setting the Water Temperature How to Set the Day of the Week and Time The current water temperature will appear in the area Day of the Week Setting labeled TIME SUN Time Setting How to Change the Temperature Setting 1.
  • Page 56 [ IV Remote Controller ] How to Set the Weekly Timer How to View the Weekly Timer Settings 1. On the Normal Operation screen, make sure that the weekly timer icon Time Settings is displayed. 2. Press the TIMER MENU button , so that the “Set Up”...
  • Page 57 [ IV Remote Controller ] How to Set the Simple Timer To Turn Off the Simple Timer Press the TIMER ON/OFF button so that the timer setting no longer Time Setting appears on the screen (at Action (On or Off) AFTER “–...
  • Page 58 [ IV Remote Controller ] Using the Auto-Off Timer Checking the Current Auto-Off Timer Setting 1. This timer begins countdown when the unit starts, and shuts the unit off Timer Setting when the set time has elapsed. 2. Available settings range from 30 minutes to 4 hours in 30-minute intervals. TIMER AFTER Note:...

  • Page 59: Function Settings

    [ IV Remote Controller ] [2] Function Settings The settings for the following remote controller functions can be changed using the remote controller function selection mode. Change the settings as necessary. Item 1 Item 2 Item 3 (Setting content) 1. Display language Display language selection •...
  • Page 60 [ IV Remote Controller ] Settings details [4]-3. Basic functions (1) Remote controller main/sub setting [4]-1. Display language setting • Press the [ ON/OFF] button to toggle between the following options. The display language can be selected from the languages listed below. Main The controller will be designated as the main controller.
  • Page 61 [ IV Remote Controller ] - 54 - HWE1312A...
  • Page 62 V Electrical Wiring Diagram [1] Electrical Wiring Diagram....................57 - 55 - HWE1312A...
  • Page 63 - 56 - HWE1312A...

  • Page 64: Electrical Wiring Diagram

    [ V Electrical Wiring Diagram ] V Electrical Wiring Diagram [1] Electrical Wiring Diagram CNLVC CNLVA CN105 CN142D CN142C CN142B CN142A CN801 CN3A CN102 CN52C blue blue blue black yellow blue CNTYP CN43 black yellow - 57 - HWE1312A...
  • Page 65 [ V Electrical Wiring Diagram ] CNLVC CNLVA CN801 CN52C CNIT CN62 blue yellow green CN43 CNTYP yellow black - 58 - HWE1312A...
  • Page 66 [ V Electrical Wiring Diagram ] - 59 - HWE1312A...
  • Page 67 [ V Electrical Wiring Diagram ] - 60 - HWE1312A...

  • Page 68: Refrigerant Circuit

    VI Refrigerant Circuit [1] Refrigerant Circuit Diagram ..................... 63 [2] Principal Parts and Functions ..................64 - 61 - HWE1312A...
  • Page 69 - 62 - HWE1312A...

  • Page 70: Refrigerant Circuit Diagram

    [ VI Refrigerant Circuit ] VI Refrigerant Circuit [1] Refrigerant Circuit Diagram Table of symbols and circuit components Symbol Symbol Component Component MAIN circuit SUB circuit MAIN circuit SUB circuit LEV1 LEV1 Linear expansion valve (Main circuit) TH12 TH18 Outlet hot water temperature sensor LEV2 LEV2 Linear expansion valve (Injection circuit)

  • Page 71: Principal Parts And Functions

    [ VI Refrigerant Circuit ] [2] Principal Parts and Functions 1. Outdoor unit Part Symbols Notes Usage Specifications Check method name (functions) Com- Adjusts the amount of circulat- Low-pressure shell scroll pres- (Comp) ing refrigerant by adjusting the compressor operating frequency based on Wirewound resistance the operating pressure data 20°C[68°F] : 0.092 ohm...
  • Page 72 [ VI Refrigerant Circuit ] Part Symbols Notes Usage Specifications Check method name (functions) Thermi TH2,6 1) Detects suction tempera- Degrees Celsius Resistance check stor (suction) ture = 15k 2) Provide low pressure pro- = 3385 0/80 tection R = 15 3385 TH3,7 1) Detects compressor shell...
  • Page 73 [ VI Refrigerant Circuit ] - 66 - HWE1312A...

  • Page 74: Control

    VII Control [1] Functions and Factory Settings of the Dipswitches ............69 [2] Operating characteristics and Control Capabilities ............87 - 67 - HWE1312A...
  • Page 75 - 68 - HWE1312A...

  • Page 76: Functions And Factory Settings Of The Dipswitches

    [ VII Control ] VII Control [1] Functions and Factory Settings of the Dipswitches 1. Factory Switch Settings (Dip switch settings table) Factory setting MAIN Setting Function Usage OFF setting ON setting circuit circuit timing Depends Model setting . s i on the unit .
  • Page 77 [ VII Control ] 2. Slide switch (SWS1) settings Individual system SWS1 Setting Unit Operation MAIN circuit SUB circuit MAIN circuit SUB circuit LOCAL Follows the input signal of the sub circuit LOCAL Follows the input signal of the MAIN circuit Ignores the signal input REMOTE Follows the input signal of the sub circuit...
  • Page 78 [ VII Control ] Priority order of the water-temperature-setting-input-signal sources Water temperature can be controlled by using the signals from the four types of input sources listed below. The setting for the item with higher priority will override the settings for the items with lower priorities. The water temperature will be controlled according to the temperature setting in the "Target water temperature"...
  • Page 79 [ VII Control ] Water-temperature setting Different water temperature settings can be set for different modes. Use item codes 11, 13, 22, 23, 24, 25, 26, or 27 to set the water temperatures. - 72 - HWE1312A...
  • Page 80 [ VII Control ] (1) Setting procedures Set the dip switches on the circuit board as follows before making the settings for the items described in this section. Step 0 Set SWS1 to OFF from the remote controller or with the local switch. Most settings (other than item codes 11 and 13 (water temperature setting)) cannot be Set the ON/OFF changed unless the ON/OFF setting is set to OFF.
  • Page 81 [ VII Control ] Heating ECO (Curve) Water temp. Water temp. setting C3 Water temp. setting C5 Water temp. setting C1 Outside temp. Outside temp. Outside temp. Outside temp. setting C4 setting C6 setting C2 * Always use a value for setting C6 that is between setting value C2 and setting value C4, and for setting C5 between setting value C1 and setting value C3.
  • Page 82 [ VII Control ] (2) Scheduled operation Up to three sets of start/end times can be assigned for each day. To operate the units according to the schedule, set the item code 5 to "1", and set the time for item codes 6 through 9 and 1300 through 1302.
  • Page 83 [ VII Control ] [When the operation Start/End times do not overlap] Operation Period 1 Operation Period 1 Operation Period 2 Operation Period 2 Operation Period 3 Operation Period 3 Target water temp. Item code 1219 setting Item code 1220 setting Item code 1218 setting Operation command signal...
  • Page 84 [ VII Control ] (3) Selecting the preset temperature for different operation periods Setting procedures Step 0 Set SWS1 to OFF from the remote controller or with the local switch. Settings cannot be changed unless the ON/OFF setting is set to OFF. Set the ON/OFF switch (SWS1) to OFF.
  • Page 85 [ VII Control ] Selecting the preset temperature for different operation periods When operating the units on schedule, preset temperatures can be selected from A, B, or C for time periods 1 through 3. Item code 1218: Operation time setting 1 Item code 1215: Preset temp.
  • Page 86 [ VII Control ] (4) Peak-demand control operation Peak-demand control is a function used to control the power consumptions of the units during peak-demand hours. The number of units in operation and the compressor's maximum operating frequency will be controlled according to the peak-demand control signal.
  • Page 87 [ VII Control ] (5) Setting the total number of units for a multiple system Step 0 Set SWS1 to OFF from the remote controller or with the local switch. Settings cannot be changed unless the ON/OFF switch is set to OFF. Set the ON/OFF switch (SWS1) to OFF.
  • Page 88 [ VII Control ] (6) Selecting the item that normally appears on the LED Display content Displays the operation mode.(*1) Displays the operation mode.(*2) Displays the current water temperature. Displays the water-temperature setting. Displays the high and low refrigerant pressures. (*1) The dot lights up when the operation signal is on.
  • Page 89 [ VII Control ] (7) Remote water temperature setting input signal type By setting SW2-7 to ON, external analog signals can be used to set the water temperatures. Analog input type can be selected from the following four types: "0": 4-20 mA "1": 0-10 V "2": 1-5 V "3": 2-10 V...
  • Page 90 [ VII Control ] (8) Setting the water temperature using analog signal input • When dip switch SW2-7 is set to ON (Enable external input) and item code 1051 is set to "0", the target water temperature varies with the preset temperatures A and B and the type of analog input signal. •...
  • Page 91 [ VII Control ] (9) Setting the capacity control ratio using analog signal input • When dip switch SW2-7 is set to ON (Enable external input) and item code 1051 is set to "1", the capacity control ratio varies with the type of analog input signal. •...
  • Page 92 [ VII Control ] (10) Setting the booster heater 1 operation conditions A temperature at which the booster heater 1 will go into operation (TWL) can be selected. Select item code 1057 and 1058 to set the threshold temperature (TWL1 and TAL1) for booster heater operation. Booster heater 1 operation conditions •...
  • Page 93 [ VII Control ] Step 2 Select the item to be set with push switch SWP3. Step 3 Change the values with push switches SWP1 (↑) or SWP2 (↓). Select item code 1057 and 1058 to set the operation temperature (TWL1 and TAL1) for the booster heater 1. Press push switch SWP3 to select the item code.

  • Page 94: Operating Characteristics And Control Capabilities

    [ VII Control ] [2] Operating characteristics and Control Capabilities Outline of Control Method -1- Operating characteristics Function Component Symbol Control/ Unit Trigger condition Detection tion Unit Pressure High-pressure 63H1 HP 63H1 (3.25) protection switch switch OFF MPa 4.15 High-pressure 63HS HP 63HS OFF MPa...
  • Page 95 [ VII Control ] Startup sequence rotation -2- Initial control When the power is turned on, the initial processing of the microcomputer is given top priority. During the initial processing, processing of the operation signal is suspended and is resumed after the initial processing is completed.
  • Page 96 [ VII Control ] Bypass Control Compressor Frequency Control -4- Injection LEV Operating range of the LEV Opening range: 40-480 (fully open) LEV operation speed Open 133 plus/sec Close 200 plus/sec At startup For one minute after startup, the valve will be fixed to Initial Setting 1. Between one and five minutes after startup, the valve will be fixed to Initial Setting 2.
  • Page 97 [ VII Control ] -5- LEV in the main circuit Operating range of the LEV The opening range of the LEV is between 100 and 1400 (fully open). LEV operation speed Open 133 plus/sec Close 200 plus/sec At startup For one minute and thirty seconds after startup, the valve will be fixed to the Initial Setting. During operation Ninety or more seconds after startup, the LEV opening will be controlled every 30 seconds according to the changes in com- pressor frequency, pressure, and temperature.
  • Page 98 [ VII Control ] -7- Anti-short-cycling protection The unit has a 3-minute restart-delay function to protect the compressor from short-cycling. This function is effec- 3-minute restart delay function The 3-minite restart-delay function will tive even after a power failure. be triggered in the following situations: (1) The setting for the SWS1 (Local, Off, Remote) was changed, or (2) after Min.
  • Page 99 [ VII Control ] Control at Initial Start-up -8- Peak-demand control General idea about demand control in the system with a combination of a heat pump and a combustion-type hot water boiler. →During peak-demand hours, the operation of the air conditioning units is given higher priority than that of the heat pump units. 1.Individual system The peak-demand control function is a function that restricts the maximum capacity of the units.
  • Page 100 [ VII Control ] Emergency Operation Mode -9- Multiple system control 1. Electrical wiring diagram n units MAIN MAIN MAIN External temperature Inter-unit wiring Inter-unit wiring sensor (M-NET line) (M-NET line) Field-supplied dry contact switch/relay MAIN unit SUB unit SUB unit(s) or remote controller (PAR-W21MAA) ( * ) Main/Sub units and switch settings...
  • Page 101 [ VII Control ] Control Method -10- Automatic operation of pump for freeze-up protection 1. Purpose This is a function to protect the water circuit from freezing up in winter. 2. Pump wire connection TO SUB BOX TB3 Transmission cable for multiple unit control Measurement terminal for maintenance(M-NET) yellow blue...
  • Page 102 [ VII Control ] Cooling/heating Circuit Control and General Function of System Equipment -11- Water-temperature control Water temperature can be controlled in the following three ways. Select one that works best. Switch Factory setting Outlet-water-temperature-based control SW3-3 Inlet-water-temperature-based control Water temperature control based on the SW2-8 external water temperature reading SW3-3...
  • Page 103 [ VII Control ] 2. Normal Thermo-ON/OFF operations DIFF1 = 2 ºC (Initial setting): “1015” Digitally set value DIFF2 = 2 ºC (Initial setting): “1016” Digitally set value Tmax=67 ºC Single/Multiple Thermo-ON Thermo-ON sensor Thermo-OFF conditions system conditions conditions Inlet water temperatures are Inlet water temperatures is low- greater than the "set tempera- er than the "Inlet temperature...
  • Page 104 [ VII Control ] Multiple system control (inlet-water-temperature-based control) When the water temperature is controlled based on the Thermo-OFF temperature representative inlet temperature, compressor frequency will Preset water temperature DIFF2/2°C be controlled as described in section -3-"Compressor frequency" (page 88). (Automatic operation according to the DIFF2/2°C preset temperature) Inlet water temperature...
  • Page 105 [ VII Control ] Operation Mode -12- Controlling the operation of unit using external water temperature sensors The water temperature can be controlled using the built-in sensor on the unit or a separately sold external water temperature sensor. The factory setting for the sensor option is "built-in sensor on the unit." (SW2-8: OFF) To control the water temperature with an external water temperature sensor, set SW2-8 to ON.
  • Page 106 [ VII Control ] External water temperature sensor TW-TH16 1. Parts that are required to install an external water Wire specifications temperature sensor Wire size 2-core cable Min. 1.25 mm (1) External water temperature sensor (2) Wiring to connect the sensor and the unit* Type CVVS or CPEVS (3) Wiring terminals to connect the wiring to the sensor and...
  • Page 107 [ VII Control ] - 100 - HWE1312A...

  • Page 108: Test Run Mode

    VIII Test Run Mode [1] Items to be checked before a Test Run ................. 103 [2] Test Run Method ......................105 [3] Operating the Unit......................106 [4] Refrigerant ........................108 [5] Symptoms that do not Signify Problems ................ 108 [6] Standard operating characteristics (Reference data) ............ 108 - 101 - HWE1312A...
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  • Page 110: Items To Be Checked Before A Test Run

    [ VIII Test Run Mode ] VIII Test Run Mode [1] Items to be checked before a Test Run (1) Check for refrigerant leak and loose cables and connectors. (2) Measure the insulation resistance between the power supply terminal block and the ground with a 500V megger and make sure it reads at least 1.0Mohm.
  • Page 111 [ VIII Test Run Mode ] (10) Check that the unit is operating properly according to the temperature adjustment function. When a pull-down operation is completed, check that the hot water temperature adjustment function will come on and that the unit will automatically go on and off.

  • Page 112: Test Run Method

    [ VIII Test Run Mode ] [2] Test Run Method [Set Temperature] buttons ( Down/ Up buttons) [TIMER MENU] button (MONITOR/SET button) [Mode] button (BACK button) [Set Time] buttons ( Back/ Ahead buttons) [TIMER ON/OFF] button (DAY button) [CHECK] button (CLEAR button) [TEST RUN] button Not available TEMP.

  • Page 113: Operating The Unit

    [ VIII Test Run Mode ] [3] Operating the Unit 1. Initial Operation (1) Make sure the Run/Stop switch that controls the unit on the local control panel is switched off. (2) Verify with the following checklist whether the heat source was properly selected.* (3) Switch on the main power.
  • Page 114 [ VIII Test Run Mode ] 2. Daily Operation To start an operation Switch on the Run/Stop switch that controls the unit on the local control panel, or press the ON/OFF button on the remote controller. (*1) Note The unit described in this manual features a circuit that protects the compressor from short-cycling. Once the compressor stops, it will not start up again for up to 10 minutes.

  • Page 115: Refrigerant

    [ VIII Test Run Mode ] [4] Refrigerant CRHV-P600YA-HPB Unit type Refrigerant type R410A 4.5kg × 2 Refrigerant charge [5] Symptoms that do not Signify Problems Symptom Remote controller display Cause The display shown right will appear "PLEASE WAIT" ("HO") The system is under starting up.

  • Page 116: Troubleshooting

    IX Troubleshooting [1] Maintenance items......................111 [2] Troubleshooting ......................119 [3] Troubleshooting Principal Parts ..................125 [4] Refrigerant Leak ......................141 [5] Parts Replacement Procedures ..................142 - 109 - HWE1312A...
  • Page 117 - 110 - HWE1312A...

  • Page 118: Maintenance Items

    [ IX Troubleshooting ] IX Troubleshooting [1] Maintenance items 1. Checking the error history Take the following steps to view the last six error histories (error codes). Refer to “[2] 2.Error code list” for information about error codes. (page 121) Setting procedure Set the dip switches on the circuit board as follows to view error histories.
  • Page 119 [ IX Troubleshooting ] Error history item list Unit and circuit type Item Item LED display Main unit Sub unit Notes code MAIN circuit SUB circuit MAIN circuit SUB circuit Error history 1 Error Code ○ ○ ○ ○ Error history 1 details (Inverter error) Error Code ○...
  • Page 120 [ IX Troubleshooting ] 2. Checking the sensor status Setting procedure Set the dip switches on the circuit board as follows to check temperatures and pres- Step 1 Set the dip switches sures. SW2 and SW3. Press the push switch SWP3 to toggle through the item codes listed below. Step 2 Select the desired Select an item code from c01 through c36, and press either of the push switches SWP1...
  • Page 121 [ IX Troubleshooting ] Sensors and item code list Unit and circuit type Item Item LED display Main unit Sub unit Notes code MAIN circuit SUB circuit MAIN circuit SUB circuit MAIN circuit SUB circuit Error history 1 Error Code ○...
  • Page 122 [ IX Troubleshooting ] 3. Operation status before error Setting procedure Set the dip switches on the circuit board as follows to view the operation status before Step 1 Set the dip switches error. SW2 and SW3. Press the push switch SWP3 to toggle through the item codes listed below. Step 2 Select the desired item with the push...
  • Page 123 [ IX Troubleshooting ] Time of data storage before error Unit and circuit type Item Item LED display Main unit Sub unit code MAIN circuit SUB circuit MAIN circuit SUB circuit MAIN circuit SUB circuit Inlet water temp (Twi ) Inlet water temp 2 TH17 First decimal place ○...
  • Page 124 [ IX Troubleshooting ] 4. Maintenance setting 1 This category includes items that are set during test run and maintenance. Setting procedure Set the dip switches on the circuit board as follows. Step 1 Set the dip switches SW2 and SW3. By setting SW3-9 to ON after setting the dip switches SW2 and SW3 as shown left, the setting values can be checked.
  • Page 125 [ IX Troubleshooting ] Maintenance item (1) list Unit type Switch Item Incre- Lower Upper Main unit Sub unit Notes Default setting code ments limit limit timing MAIN circuit SUB circuit MAIN circuit SUB circuit Forcing the units in a specific system to stop 1004 ○...

  • Page 126: Troubleshooting

    [ IX Troubleshooting ] [2] Troubleshooting Troubleshooting according to the remote controller malfunction or the external input error Both for MA remote controller and ME remote controller 1. If a problem occurs, please check the following. If a protection device has tripped and brought the unit to stop (when an error code is blinking on the LED), resolve the cause of the error before resuming operation.
  • Page 127 [ IX Troubleshooting ] Problem Check item Cause Solution The unit has Automatic Start/Stop Water temperature is Normal stopped during thermistor has tripped. high. operation and does not restart. Water temperature is The setting for the automatic Start/Stop Change the setting for the automatic Start/ low.
  • Page 128 [ IX Troubleshooting ] 2. Error code list If a problem occurs, please check the following before calling for service. (1) Check the error code against the table below. (2) Check for possible causes of problems listed in the "Cause" column that correspond to the error code. (3) If the error codes that appear on the display are not listed in the table below, or no problems were found with the items listed in the "Cause"...
  • Page 129 [ IX Troubleshooting ] Error reset *3 Unit Error Cause Cause side Remote code *1 Error type (PCB) (Installation/Setting error) (Parts problems) (PCB *2) Operation SWS1 • Suction refrigerant temperature 1101 the upper limit of the operating range. thermistor fault Discharge temperature fault No water •...
  • Page 130 [ IX Troubleshooting ] Error reset *3 Unit Error Cause Cause side Remote code *1 Error type (PCB) (Installation/Setting error) (Parts problems) (PCB *2) Operation SWS1 Inverter Voltage Bus voltage drop protection Momentary power failure/power failure • INV board CNDC2 wiring fault 4220 error related...
  • Page 131 [ IX Troubleshooting ] Error reset *3 Unit Error Cause Cause side Remote code *1 Error type (Installation/Setting error) (Parts problems) (PCB) (PCB *2) Operation SWS1 Multiple 7105 system (Non-consecutive address) error Incompatible combination of units Different types of units are connected to 7130 the same system.

  • Page 132: Troubleshooting Principal Parts

    [ IX Troubleshooting ] [3] Troubleshooting Principal Parts High-Pressure Sensor -1- High-Pressure Sensor (63HS) 1. Compare the pressure that is detected by the high pressure sensor, and the high-pressure gauge pressure to check for failure. Error history, temperature and pressure readings of the sensor, and LEV opening High pressure and low pressure will appear alternately on the 7-seg- ment LED at P-second intervals (Default: 3 seconds).
  • Page 133 [ IX Troubleshooting ] Low-Pressure Sensor -2- Low-Pressure Sensor (63LS) 1. Compare the pressure that is detected by the low pressure sensor, and the low pressure gauge pressure to check for failure. Error history, temperature and pressure readings of the sensor, and LEV opening High pressure and low pressure will appear alternately on the 7-seg- ment LED at P-second intervals (Default: 3 seconds).
  • Page 134 [ IX Troubleshooting ] Solenoid Valve -3- Temperature sensor Use the flowchart below to troubleshoot the temperature sensor. Troubleshooting the thermistor (1)Thermistor <Heatsink temperature> :THHS Start Thermistor = 17 kΩ±2% { 4016 ( R = 17 Disconnect the thermistor to be checked from the circuit board. 273 +t Measure the actual temperature of the pipe at the thermistor.
  • Page 135 [ IX Troubleshooting ] -4- LEV 1. General descriptions of the operation of the LEV in the main circuit LEV1 is driven by the pulse signal from the circuit board and is controlled by a stepping motor. The valve opening changes according to the number of pulses 1) Control board and LEV Outdoor control board Intermediate connector...
  • Page 136 [ IX Troubleshooting ] 2. General descriptions of injection LEV operation The valve opening changes according to the number of pulses. 1) Control board and LEV Outdoor control board DC12V ø6 ø5 Brown Drive circuit ø4 ø4 Blue ø3 ø3 Orange ø2 ø2...
  • Page 137 [ IX Troubleshooting ] (1) Judgment methods and possible failure mode Malfunction Judgment method Remedy mode Microcomputer Disconnect the control board connector and connect When the drive circuit has a driver circuit fail- the check LED as shown in the figure below. problem, replace the control board.
  • Page 138 [ IX Troubleshooting ] 3. Injection LEV coil removal procedure The LEV consists of a coil and a valve body that can be separated from each other. Body Coils Stopper Lead wire (1) Removing the coils Fasten the body tightly at the bottom (Part A in the figure) so that the body will not move, then pull out the coils toward the top.If the coils are pulled out without the body gripped, undue force will be applied and the pipe will be bent.
  • Page 139 [ IX Troubleshooting ] Inverter -5- Inverter Replace only the compressor if only the compressor is found to be defective. Replace only the fan motor if only the fan motor is found to be defective. Replace the defective components if the inverter is found to be defective. If both the compressor and the inverter are found to be defective, replace the defective component(s) of both devices.
  • Page 140 [ IX Troubleshooting ] Error display/failure condition Measure/inspection item Inverter related errors Check the details of the inverter error in the error log at [1] Error history 4250, 4220, 4230, 4240, 5301, 5110, 0403 item list. Take appropriate measures to the error code and the error details in ac- cordance with [2] 2.Error code list.
  • Page 141 [ IX Troubleshooting ] (2) Inverter output related troubles Items to be checked Phenomena Remedy Disconnect the invert- Overcurrent error Replace the INV board. Check the er output wire from (4250 Detail code No. 101, 104, INV board er- the terminals of the 105, 106, and 107) ror detection INV board (SC-U,...
  • Page 142 [ IX Troubleshooting ] Items to be checked Phenomena Remedy Put the outdoor unit into oper- Overcurrent-related problems oc- a. Check items [1] through [3] Check whether ation. cur immediately after compressor for problems. the inverter is Check the inverter output volt- startup.
  • Page 143 [ IX Troubleshooting ] (3) Trouble treatment when the main power breaker is tripped Items to be checked Phenomena Remedy Check the breaker capacity. Use of a non-specified break- Replace it with a specified breaker. Perform Meg check between the Zero to several ohm, or Meg Check each part and wiring.
  • Page 144 [ IX Troubleshooting ] (5) Simple checking procedure for individual components of main inverter circuit 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 voltage between FT-P and FT-N on INV Board has dropped to DC20V or less. Part name Judgment method IGBT module...
  • Page 145 [ IX Troubleshooting ] Judgment value (reference) Black ( + ) SC-P1 FT-N SC-L1 SC-L2 SC-L3 SC-P1 5 - 200 ohm 5 - 200 ohm 5 - 200 ohm FT-N Red (-) SC-L1 5 - 200 ohm SC-L2 5 - 200 ohm SC-L3 5 - 200 ohm Black ( + )
  • Page 146 [ IX Troubleshooting ] Control Circuit -6- Control Circuit Troubleshooting transmission power circuit of unit Check the voltage at the internal transmission terminal block (TB3) of unit. DC 24 ~ 30 V Check whether the transmission line is disconnected, check for contact failure, and repair the problem. Check the voltage at TB3 after removing transmission line from TB3.
  • Page 147 [ IX Troubleshooting ] Outdoor Unit Fan -7- Troubleshooting 1. Important notes If the unit or its refrigerant circuit components experience malfunctions, take the following steps to prevent recurrence. (1) Diagnose the problem and find the cause. (2) Before repairing leaks on the brazed sections on the pipes, recover the refrigerant. Braze under nitrogen purge to prevent oxidation.

  • Page 148: Refrigerant Leak

    • It may also be in violation of applicable laws. • MITSUBISHI ELECTRIC CORPORATION cannot be held responsible for malfunctions or accidents resulting from the use of the wrong type of refrigerant.

  • Page 149: Parts Replacement Procedures

    • It may also be in violation of applicable laws. • MITSUBISHI ELECTRIC CORPORATION cannot be held responsible for malfunctions or accidents resulting from the use of the wrong type of refrigerant.
  • Page 150 [ IX Troubleshooting ] Compressor Replacement Procedure 1. At the front of the product, remove the service panel FU and then remove the cover of the <MAIN> control box. 2. Set the SWS1 switch of the control board to OFF and then turn the main power (breaker) OFF.
  • Page 151 [ IX Troubleshooting ] 1. Remove the 7 base clamps. 2. Remove the 6 fixing screws of the <SUB> control box support plate and the 2 mounting screws of the <SUB> control box. 1 screw 1 screw <SUB> control box <SUB>...
  • Page 152 [ IX Troubleshooting ] 1. Remove the brazing from the suction pipe openings, Injection pipes discharge pipe openings, and injection pipes. (Ø9.52) 2. Remove the injection pipes. 3. Drag out the compressors to replace them. Discharge pipes (Ø15.88) Suction pipes (Ø28.6) Injection pipes (Ø9.52)
  • Page 153 [ IX Troubleshooting ] 1. Perform evacuation with a vacuum pump from the high-pressure check joints. <MAIN> low-pressure check joint (Evacuating the system through the low-pressure check joint <MAIN> high-pressure check joint will cause the oil in the refrigerant system to be discharged, resulting in compressor malfunction.) 2.
  • Page 154 [ IX Troubleshooting ] Hot Water Side Heat Exchanger Replacement Procedure 1. At the front of the product, remove the service panel FU and then remove the cover of the <MAIN> control box. 2. Set the SWS1 switch of the control board to OFF and then turn the main power (breaker) OFF.
  • Page 155 [ IX Troubleshooting ] 1. Remove the 7 base clamps. 2. Remove the 6 fixing screws of the <SUB> control box support plate and the 2 mounting screws of the <SUB> control box. 1 screw 1 screw <SUB> control box <SUB>...
  • Page 156 [ IX Troubleshooting ] 1. Disconnect the connector of the low-voltage wiring connected High-voltage wiring to the control board of the <MAIN> control box and then remove the 3 clamps 1 securing the low-voltage wiring. 2. Disconnect the communication wires and control wires connected to the terminal block.
  • Page 157 [ IX Troubleshooting ] 1. Remove the brazing from the discharge pipes and liquid pipes. 2. Remove the 1 heat exchanger fixing screw of the hot water side heat exchanger fixing plate. Liquid pipe (Ø12.7) 1 screw Hot water side heat exchanger fixing pate Discharge pipe...
  • Page 158 [ IX Troubleshooting ] 1. Remove the pipe covers from the discharge pipes. Discharge pipe covers * The removed parts are required as they will be reattached after replacement of the heat exchanger. Do not throw them away. 1. Remove the brazing from the discharge pipes and liquid pipes. 2.
  • Page 159 [ IX Troubleshooting ] 1. Perform evacuation with a vacuum pump from the high-pressure check joints. <MAIN> low-pressure check joint (Evacuating the system through the low-pressure check joint <MAIN> high-pressure check joint will cause the oil in the refrigerant system to be discharged, resulting in compressor malfunction.) 2.
  • Page 160 [ IX Troubleshooting ] Heat Source Water Side Heat Exchanger Replacement Procedure 1. At the front of the product, remove the service panel FU and then remove the cover of the <MAIN> control box. 2. Set the SWS1 switch of the control board to OFF and then turn the main power (breaker) OFF.
  • Page 161 [ IX Troubleshooting ] 1. Remove the 7 base clamps. 2. Remove the 6 fixing screws of the <SUB> control box support 1 screw plate and the 2 mounting screws of the <SUB> control box. 1 screw <SUB> control box <SUB>...
  • Page 162 [ IX Troubleshooting ] 1. Remove the wall temperature thermistor retainer plate (3 screws). 2. Remove the 2 clamps securing the wall temperature thermistors and then remove the wall temperature thermistors Heat exchanger wall from the heat exchanger. temperature thermistor (identification tape: gray, 1 piece) * The removed parts are required as they will be reattached...
  • Page 163 [ IX Troubleshooting ] 1. Remove the LEV pipe fixing plate (2 screws). 2. Remove the 2 fixing screws of the heat source water side heat exchanger. 2 screws LEV pipe fixing plate 2 fixing screws of heat source water side heat exchanger 1.
  • Page 164 [ IX Troubleshooting ] Suction pipes 1. Install the LEV pipes. (Ø28.6) 2. Join the suction pipe and LEV pipe brazing portions. LEV pipes (Ø15.88) 1. Evacuate the system through the high-pressure check joint, and charge 400 cc of refrigerant oil through the low-pressure check joint.
  • Page 165 [ IX Troubleshooting ] - 158 - HWE1312A...

  • Page 166: Attachments

    X Attachments [1] R410A saturation temperature table ................161 - 159 - HWE1312A...
  • Page 167 - 160 - HWE1312A...

  • Page 168: R410A Saturation Temperature Table

    [ X Attachments ] X Attachments [1] R410A saturation temperature table Saturation pressure Saturating temperature °C Saturation pressure Saturating temperature °C Saturation pressure Saturating temperature °C Saturation pressure Saturating temperature °C Saturation pressure Saturating temperature °C MPa(gauge) Saturated liquid Saturated gas MPa(gauge) Saturated liquid Saturated gas MPa(gauge)
  • Page 169 [ X Attachments ] Saturation pressure Saturating temperature °C MPa(gauge) Saturated liquid Saturated gas 4.00 63.08 63.19 4.01 63.19 63.27 4.02 63.31 63.38 4.03 63.42 63.49 4.04 63.53 63.60 4.05 63.64 63.71 4.06 63.75 63.82 4.07 63.86 63.93 4.08 63.97 64.04 4.09 64.08...

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