Mitsubishi Electric CMB-WM108V-AA Service Handbook
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Mitsubishi Electric CMB-WM108V-AA Service Handbook

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  • Page 2 It may also be in violation of applicable laws. Doing so may result in electric shock, malfunction, or fire. MITSUBISHI ELECTRIC CORPORATION cannot be held responsible for malfunctions or accidents result- Do not touch the refrigerant pipes and re- ing from the use of the wrong type of refrigerant.
  • Page 3 Periodically check the unit base for dam- The unit shall be installed, operated and age. stored in a room with a floor area according to the following figure. If the damage is left uncorrected, the unit will fall and cause serious injury. The HBC controller(s) shall not be installed in a condition with certain floor area and the Consult your dealer for the proper disposal...
  • Page 4 Do not lift the unit with the PP bands that are Observe the restrictions on the maximum used on some products. weight that a person can lift, which is spec- ified in local regulations. Doing so may result in injury. Failure to do so may result in injury.
  • Page 5 Do not purge the air using refrigerant. Use a After the installation has been completed, vacuum pump to evacuate the system. check for refrigerant leaks. Residual gas in the refrigerant lines will cause bursting If the refrigerant leaks, oxygen starvation may result. If of the pipes or an explosion.
  • Page 6 [6] Relocation and Repairs Relocation and Repairs Only qualified personnel must relocate or Check for refrigerant leaks before service. repair the unit. Do not attempt to disassem- If the refrigerant leaks, fire may result. ble or alter the unit. Do not open the control box cover when re- Failure to do so will result in refrigerant leakage, water covering, charging, or purging refrigerant.
  • Page 7 Use the following tools specifically de- Do not use a charging cylinder when signed for use with the specified refriger- charging refrigerant. ant: Gauge manifold, charge hose, gas leak The use of a charging cylinder may change the compo- detector, check valve, refrigerant charge sition of the refrigerant and lead to a performance drop.

  • Page 8: Table Of Contents

    CONTENTS I Read Before Servicing [1] Read Before Servicing......................3 [2] Necessary Tools and Materials ....................4 [3] Piping Materials ........................5 [4] Storage of Piping ........................7 [5] Pipe Processing........................7 [6] Brazing............................8 [7] Air Tightness Test (Refrigerant Circuit) ..................9 [8] Vacuum Drying (Evacuation) (Refrigerant Circuit)..............
  • Page 9 HWE1708A...
  • Page 10 I Read Before Servicing [1] Read Before Servicing ....................... 3 [2] Necessary Tools and Materials..................4 [3] Piping Materials ......................... 5 [4] Storage of Piping ....................... 7 [5] Pipe Processing ......................... 7 [6] Brazing..........................8 [7] Air Tightness Test (Refrigerant Circuit)................9 [8] Vacuum Drying (Evacuation) (Refrigerant Circuit)............
  • Page 11 - 2 - HWE1708A...

  • Page 12: Read Before Servicing

    [ I Read Before Servicing ] I Read Before Servicing [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 R2 YLM/YNW series: R410A CITY MULTI R2 (E)M-YNW series: R32 CITY MULTI WR2 YLM series: R410A 2.

  • Page 13: Necessary Tools And Materials

    [ I Read Before Servicing ] [2] Necessary Tools and Materials Prepare the following tools and materials necessary for installing and servicing the unit. Tools for use with R410A and R32 (Adaptability of tools that are for use with R22 or R407C) 1.

  • Page 14: Piping Materials

    [ I Read Before Servicing ] [3] Piping Materials Do not use the existing piping! 1. Copper pipe materials O-material (Soft Annealed) Soft copper pipes (annealed copper pipes). They can easily be bent with hands. 1/2H-material (Light Annealed) Hard copper pipes (straight pipes). They are stronger than the O-material (Soft An- nealed) at the same radial thickness.
  • Page 15 [ I Read Before Servicing ] 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 (Soft Annealed) and OL-material only) The flare processing dimensions for the pipes that are used in the R410A and R32 system are larger than those in the R22 system.

  • Page 16: Storage Of Piping

    [ I Read Before Servicing ] [4] Storage of Piping 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: Brazing

    [ I Read Before Servicing ] [6] 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 18: Air Tightness Test (Refrigerant Circuit)

    [ I Read Before Servicing ] [7] Air Tightness Test (Refrigerant Circuit) No changes have been made in the detection method. Note that a refrigerant leak detector for R22 will not detect R410A and R32 leak. Halide torch R22 leakage detector 1.

  • Page 19: Vacuum Drying (Evacuation) (Refrigerant Circuit)

    [ I Read Before Servicing ] [8] Vacuum Drying (Evacuation) (Refrigerant Circuit) (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 20 [ I Read Before Servicing ] 7. Notes To evacuate air from the entire system Applying a vacuum through the check joints at the refrigerant service valve on the high and low pressure sides (BV1 and 2) is not enough to attain the desired vacuum pressure. Be sure to apply a vacuum through the check joints at the refrigerant service valve on the high and low pressure sides (BV1 and 2) and also through the check joints on the high and low pressure sides (CJ1 and 2).

  • Page 21: Refrigerant Charging

    [ I Read Before Servicing ] [9] Refrigerant Charging Cylinder with a siphon Cylinder without a siphon Cylin- Cylin- Cylinder color R410A is pink. Refrigerant charging in the liquid state Cylinder color R32 is light blue. Valve Valve liquid liquid 1.

  • Page 22: Characteristics Of The Conventional And The New Refrigerants

    [ I Read Before Servicing ] [11] 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. The new refrigerant R32 is low in toxicity and slightly flammable 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 23: Precautions For Handling Equipment Using R32

    [ I Read Before Servicing ] [12] Precautions for handling equipment using R32 When handling the units that use R32 refrigerant, observe the following notes. (The notes are based on the precautions re- garding R32 refrigerant contained in IEC 60335-2-40.) 1.
  • Page 24 Where electrical components are being changed, they shall be fit for the purpose and to the correct specification. At all times the MITSUBISHI ELECTRIC's Installation Manual and Service Handbook shall be followed. If in doubt, consult the dealer's technical department for assistance.
  • Page 25 5) Pump down refrigerant system, if possible. 6) Make sure that cylinder is situated on the scales before recovery takes place. 7) Start the recovery machine and operate in accordance with MITSUBISHI ELECTRIC's instructions. 8) Do not overfill cylinders. (No more than 80% volume liquid charge) 9) Do not exceed the maximum working pressure of the cylinder, even temporarily.
  • Page 26 [ I Read Before Servicing ] 10. Appropriate refrigerant recovery method 1) When removing refrigerant from a system, either for repairing or decommissioning, it is recommended good practice that all refrigerants are removed safely. 2) When transferring refrigerant into cylinders, ensure that only appropriate refrigerant recovery cylinders are employed. Ensure that the correct number of cylinders for holding the total system charge are available.
  • Page 27 [ I Read Before Servicing ] Repair 1) Portable equipment shall be repaired outside or in a workshop specially equipped for servicing units with slightly flammable refrigerants. 2) Ensure sufficient ventilation at the repair place. 3) Be aware that malfunction of the equipment may be caused by refrigerant loss and a refrigerant leak is possible. 4) Discharge capacitors in a way that won't cause any spark.
  • Page 28 [ I Read Before Servicing ] 12. Installation restrictions for outdoor units • R32 is heavier than air—as well as other refrigerants—so tends to accumulate at the base (in the vicinity of the floor). If R32 accumulates around the base, it may reach a flammable concentration in case the room is small. To avoid ignition, maintain a safe work environment by ensuring appropriate ventilation.
  • Page 29 [ I Read Before Servicing ] Figure 2 Minimum floor area requirement (height from floor to HBC controller = 1.8 m) Installation "Good" Installation "NG" System refrigerant amount [kg] Table 1 Examples of floor area calculation Installation type Calculation of floor areas Installation in the ceiling space in Room B (Ceiling made of low-breathable material) Floor area of Room A + Floor area of Room B Installation in the ceiling space in Room B (Ceiling made of highly breathable material)

  • Page 30: Notes On Refrigerating Machine Oil

    [ I Read Before Servicing ] [13] 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. Different types of oil are used for R407C/R410A and for R32.

  • Page 31: Water Piping

    [ I Read Before Servicing ] [14] Water piping 1. Precautions for water piping Consider the following when installing a water piping system. (1) Design pressure of the water piping Use a water pipe that can withstand pressure of at least 1.0 MPa. (2) Water pipe type Use of plastic pipe is recommended.Do not use chloride plastic pipes.
  • Page 32 [ I Read Before Servicing ] 2. Notes on corrosion (1) Water quality It is important to check the water quality beforehand. See table below (Circulating water/Makeup Water Quality Standards). Lower mid-range Tendency temperature water system Recirculating Items water Make-up Scale- Corrosive [20<T<60°C]...
  • Page 33 [ I Read Before Servicing ] 3. Correction by antifreeze-liquid concentration In HYBRID CITY MULTI system, antifreeze-liquid should be used to prevent the system from freezing. Refer to the following graphs for the capacity correction by antifreeze-liquid. Refer to (1) for antifreeze-liquid concentration, (2) and (3) for capacity correction by antifreeze-liquid concentration.
  • Page 34 [ I Read Before Servicing ] (3) Capacity correction by antifreeze-liquid concentration (heating) PURY-(E)P200~500YLM-A1, PQRY-P200~500YLM-A, PURY-(E)P200~500YNW-A 0.99 1.18 0.98 1.16 0.97 1.14 0.96 1.12 0.95 0.94 1.08 0.93 1.06 0.92 1.04 0.91 1.02 Antifreeze-liquid concentration [wt%] Antifreeze-liquid concentration [wt%] PURY-(E)M200~300YNW-A 0.99 1.18 0.98...
  • Page 35 [ I Read Before Servicing ] - 26 - HWE1708A...

  • Page 36: Restrictions

    II Restrictions [1] System configuration ....................... 29 [2] Types and Maximum Allowable Length of Cables ............30 [3] Switch Settings ........................ 31 [4] M-NET Address Settings ....................32 [5] Demand Control Overview....................37 [6] System Connection Example................... 38 [7] Example System with an MA Remote Controller ............. 39 [8] Example System with an ME Remote Controller .............
  • Page 37 - 28 - HWE1708A...

  • Page 38: System Configuration

    Types of connectable (Heat source units) Sub-HBC of connectable indoor of connectable in- indoor units units door units (E)P200 CMB-WM108V-AA, 100 - 300 W/WP/WL10- W/WP/ CMB-WM1016V-AA WL125 models (E)P250 125 - 375 Indoor units for use with CMB-WM108V-AB, HBC controller...

  • Page 39: 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 outdoor unit as required.

  • Page 40: Switch Settings

    [ II Restrictions ] 2) Remote controller wiring ME remote controller MA remote controller 10 m or less Over 10 m VCTF, VCTFK, CVV, VVR, Shielded cables CVVS, CPEVS, and MVVS Type VVF, VCT Cable Number of 2-core cable 2-core cable (one pair (P) for a single wire) type cores 2 *3 *5...

  • Page 41: M-Net Address Settings

    [ II Restrictions ] [4] M-NET Address Settings Address Settings List -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 Sym- Address...
  • Page 42 [ II Restrictions ] Unit or controller Sym- Address Setting method Factory setting address range setting System con- Group remote control- 201 to 250 Assign an address that equals the sum of the smallest group troller number of the group to be controlled and 200. System remote con- Assign an arbitrary but unique address within the range listed troller...
  • Page 43 [ II Restrictions ] Room Temperature Detection Position Selection -4- Room Temperature Detection Position Selection To stop the fan during heating Thermo-OFF (SW1-7 and 1-8 on the indoor units to be set to ON), use the built-in thermistor on the remote controller or an optional thermistor. 1) To use the built-in sensor on the remote controller, set the SW1-1 to ON.
  • Page 44 [ II Restrictions ] Various Control Methods Using the Signal Input/Output Connector on Outdoor Unit -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...
  • Page 45 [ II Restrictions ] (2) Example of wiring connection CAUTION 1) Wiring should be covered by insulation tube with supplementary insulation. 2) Use relays or switches with IEC or equivalent standard. 3) The electric strength between accessible parts and control circuit should have 2750V or more. (1) CN51 (2) CN3S External input...

  • Page 46: Demand Control Overview

    [ II Restrictions ] [5] 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 unit (OC). Between 2 and 4 steps of demand control is possible by setting Dip SW6-8 on the outdoor unit (OC). Dip SW6-8 Demand control switch Input to CN3D*...

  • Page 47: System Connection Example

    [ II Restrictions ] [6] 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 48: Example System With An Ma Remote Controller

    [ II Restrictions ] [7] Example System with an MA Remote Controller Single Refrigerant System (Automatic Indoor/Outdoor Address Startup) -1- Single Refrigerant System (Automatic Indoor/Outdoor Address Startup) (1) Sample control wiring Interlock operation with the ventilation unit Leave the male Group Group connector on...
  • Page 49 [ II Restrictions ] (4) Wiring method Set one of the MA remote controllers as a sub controller. (Refer to the Instruction Manual for the MA remote con- 1) Indoor/outdoor transmission line troller for the setting method.) Daisy-chain terminals M1 and M2 of the terminal block Group operation of indoor units for indoor-outdoor transmission line (TB3) on the outdoor unit (OC), of the terminal block for indoor-outdoor trans-...
  • Page 50 [ II Restrictions ] Single Refrigerant System with Two or More LOSSNAY Units -2- Single Refrigerant System with Two or More LOSSNAY Units (1) Sample control wiring Interlock operation with the ventilation unit Leave the male Group Group connector on CN41 as it is.
  • Page 51 [ II Restrictions ] Same as [7] -1- (4) Wiring method When 2 remote controllers are connected to the sys- 1) Indoor/outdoor transmission line Daisy-chain terminals M1 and M2 of the terminal block Same as [7] -1- for indoor-outdoor transmission line (TB3) on the outdoor Group operation of indoor units unit (OC), of the terminal block for indoor-outdoor trans- Same as [7] -1-...
  • Page 52 [ II Restrictions ] Grouped Operation of Units in Separate Refrigerant Circuits -3- Grouped Operation of Units in Separate Refrigerant Circuits (1) Sample control wiring Interlock operation with the ventilation unit Move the male connector from CN41 to CN40. Group Group Group SW5-1 OFF...
  • Page 53 [ II Restrictions ] Shielded cable connection (4) Wiring method Daisy-chain the S terminal on the terminal block (TB7) on 1) Indoor/outdoor transmission line the outdoor unit (OC) with the shield wire of the shielded ca- ble. Short-circuit the earth terminal ( ) and the S terminal Same as [7] -2- on the terminal block (TB7) on the outdoor unit whose power...
  • Page 54 [ II Restrictions ] System with a Connection of System Controller to Centralized Control Transmission Line -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 55 [ II Restrictions ] Shielded cable connection (4) Wiring method Daisy-chain the S terminal of the terminal block (TB7) on the 1) Indoor/outdoor transmission line system controller, OC with the shield of the shielded cable. Short-circuit the earth terminal ( ) and the S terminal on Same as [7] -2- the terminal block (TB7) on the outdoor unit whose power...
  • Page 56 [ II Restrictions ] System with a Connection of System Controller to Indoor-Outdoor Transmission Line -5- System with a Connection of System Controller to Indoor-Outdoor Transmission Line (1) Sample control wiring Interlock operation with the ventilation unit CN41 CN40 Replace SW5-1 OFF ON Group Group...
  • Page 57 [ II Restrictions ] age is below 20 VDC. (4) Wiring method Only use shielded cables. 1) Indoor/outdoor transmission line Shielded cable connection Daisy-chain terminals M1 and M2 of the terminal block for indoor- Daisy-chain the S terminal on the terminal block (TB7) on the out- outdoor transmission line (TB3) on the outdoor unit (OC), of the ter- door units (OC, OS) with the shield wire of the shielded cable.
  • Page 58 [ II Restrictions ] System with Multiple HBC Controllers -6- System with Multiple HBC Controllers (1) Sample control wiring Move the male connector from CN41 to CN40 Group Group Group Group SW5-1 OFF ON TB02 TB15 TB15 TB15 TB02 TB15 TB15 TB02 TB15...
  • Page 59 [ II Restrictions ] that the voltage is below 20 VDC. (4) Wiring method Only use shielded cables. 1) Indoor/outdoor transmission line Shielded cable connection Daisy-chain terminals M1 and M2 of the terminal block Daisy-chain the S terminal of the terminal block (TB7) on for indoor-outdoor transmission line (TB3) on the outdoor the system controller, OC with the shield of the shielded unit (OC), of the terminal block for indoor-outdoor trans-...
  • Page 60 [ II Restrictions ] (5) Address setting method Pro- Fac- Address tory Unit or controller setting Setting method Notes set- range ting Indoor Main unit IC 01 to 50 Assign the smallest address to the main unit in the Port number setting is re- group.

  • Page 61: Example System With An Me Remote Controller

    [ II Restrictions ] [8] Example System with an ME Remote Controller System with a Connection of System Controller to Centralized Control Transmission Line -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 from CN41 to CN40.
  • Page 62 [ II Restrictions ] 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 [7] -2- Performing a group operation (including the group Shielded cable connection operation of units in different refrigerant circuits).

  • Page 63: Example System With An Ma And An Me Remote Controller

    [ II Restrictions ] [9] Example System with an MA and an ME Remote Controller System with a Connection of System Controller to Centralized Control Transmission Line -1- System with a Connection of System Controller to Centralized Control Transmission Line (1) Sample control wiring Move the male connector from CN41 to CN40.
  • Page 64 [ II Restrictions ] Shielded cable connection (3) Maximum allowable length Same as [7] -2- 1) Indoor/outdoor transmission line 2) Transmission line for centralized control Same as [7] -3- Same as [7] -2- 2) Transmission line for centralized control Shielded cable connection Same as [7] -4- Same as [7] -4- 3) MA remote controller wiring...
  • Page 65 [ II Restrictions ] (5) Address setting method Fac- Pro- dress tory Unit or controller Setting method Notes setting set- dures range ting Opera- Main 01 to Assign the smallest address to Assign an address smaller than that of the main unit in the group. the indoor unit that is connected to the tion with door...

  • Page 66: Restrictions On Pipe Length

    [ II Restrictions ] [10] Restrictions on Pipe Length CMB-WM108V-AA + CMB-WM108V-AB/BB (CMB-WM1016V-AA) (CMB-WM1016V-AB/BB) (~(E)P350) (~(E)M350) HBC (Main-HBC) HBC (Sub-HBC) Branch joint (field supply) (W/WP/WL10-W/WP/WL80) Max. 3 sets for 1 port. Total capacity < = W/WP/WL80 Junction pipe (field supply)
  • Page 67 [ II Restrictions ] CMB-WM108V-AA + CMB-WM108V-AB/BB (CMB-WM1016V-AA) (CMB-WM1016V-AB/BB) (~P350) HBC controller (Main-HBC) HBC controller (Sub-HBC) Branch joint (field supply) (W/WP/WL10-W/WP/WL80) Max. 3 sets for 1 port. Total capacity < =W/WP/WL80 Junction pipe (field supply) HU: Heat source unit, IU: Indoor unit...
  • Page 68 [ II Restrictions ] Pump 2 circuit Pump 1 circuit Pump 2 circuit Pump 1 circuit 10 11 13 14 15 16 Fig. B Pump 2 circuit Pump 1 circuit Fig. C 1) To connect multiple indoor units to a port Maximum total capacity of connected indoor units: W/WP/WL80 Maximum number of connectable indoor units: 3 units Branch joints are field-supplied.
  • Page 69 (Brazing) ø19.05 ø22.2 PURY-(E)P250 (Brazing) (Brazing) ø19.05 ø22.2 PURY-(E)P300 (Brazing) (Brazing) ø19.05 ø28.58 PURY-(E)P350 Outdoor (HBC CONTROLLER) (Brazing) (Brazing) Unit CMB-WM108V-AA ø15.88 ø19.05 side CMB-WM1016V-AA PURY-(E)M200 (Brazing) (Brazing) ø15.88 ø22.2 PURY-(E)M250 (Brazing) (Brazing) ø15.88 ø22.2 PURY-(E)M300 (Brazing) (Brazing) ø15.88 ø28.58...
  • Page 70 Model name side side ø15.88 ø19.05 PQRY-P200 (Brazing) (Brazing) Heat ø19.05 ø22.2 PQRY-P250 (HBC CONTROLLER) (Brazing) (Brazing) source CMB-WM108V-AA Unit ø19.05 ø22.2 CMB-WM1016V-AA PQRY-P300 side (Brazing) (Brazing) ø22.2 ø28.58 PQRY-P350 (Brazing) (Brazing) 4) Use of two HBC controllers HBC CONTROLLER...
  • Page 71 [ II Restrictions ] 2. Connecting the HBC controller (1) Size of the pipe that fits the standard HBC controller ports (A) To outdoor unit (B) End connection (brazing) (C) Main-HBC controller (D) Sub-HBC controller (E) Indoor unit (F) Branch joint (field supply) (G) Up to three units for 1 branch hole;...
  • Page 72 III HBC Controller Components [1] HBC Controller Components ................... 65 [2] Sub-HBC Components ....................68 [3] Control Box of the HBC Controller and Sub-HBC............72 [4] HBC Controller and Sub-HBC Circuit Board..............73 - 63 - HWE1708A...
  • Page 73 - 64 - HWE1708A...

  • Page 74: Hbc Controller Components

    From Sub-HBC (Hot water) Low pressure pipe Drain From Sub-HBC (Cold water) Expansion Vessel Water inlet To Sub-HBC (Cold water) (2) CMB-WM108V-AA To Sub-HBC (Hot water) From Main-HBC High pressure pipe Low pressure pipe From Sub-HBC (Hot water) Drain From Sub-HBC (Cold water)
  • Page 75 [ III HBC Controller Components ] 2. Rear right side (cooling) Cooling plate heat exchnger LEV2 21S4Ma Strainer 21S4Mb Pump 2 Water purge valve Air purge valve LEV1 LEV3 3. Rear left side (heating) Heating plate heat exchnger Water pressure protection valve Air purge valve Pump1...
  • Page 76 [ III HBC Controller Components ] 4. Top side (1) CMB-WM1016V-AA VB3f (2) CMB-WM108V-AA VB3e - 67 - HWE1708A...

  • Page 77: Sub-Hbc Components

    [ III HBC Controller Components ] [2] Sub-HBC Components 1. Front (1) CMB-WM1016V-AB To Main-HBC (Hot water) From Main-HBC (Hot water) To Main-HBC (Cold water) From Main-HBC (Cold water) (2) CMB-WM108V-AB To Main-HBC (Hot water) From Main-HBC (Hot water) To Main-HBC (Cold water) From Main-HBC (Cold water) - 68 - HWE1708A...
  • Page 78 [ III HBC Controller Components ] 2. Top side (1) CMB-WM1016V-AB VB3f (2) CMB-WM108V-AB VB3e - 69 - HWE1708A...
  • Page 79 [ III HBC Controller Components ] 3. Front (1) CMB-WM1016V-BB To Main-HBC (Hot water) From Main-HBC (Hot water) To Main-HBC (Cold water) From Main-HBC (Cold water) Drain (2) CMB-WM108V-BB To Main-HBC (Hot water) From Main-HBC (Hot water) To Main-HBC (Cold water) From Main-HBC (Cold water) Drain 4.
  • Page 80 [ III HBC Controller Components ] 5. Top side (1) CMB-WM1016V-BB Valve block (VB3f) (2) CMB-WM108V-BB Valve block (VB3e) - 71 - HWE1708A...

  • Page 81: Control Box Of The Hbc Controller And Sub-Hbc

    [ III HBC Controller Components ] [3] Control Box of the HBC Controller and Sub-HBC 1. CMB-WM108, WM1016V-AA, CMB-WM108, WM1016V-AB Terminal block for transmission line Terminal block for power supply AC reactor (ACL) Power supply circuit board Control board 2. CMB-WM108V, 1016V-BB Terminal block for power supply VB (valve block) board...

  • Page 82: Hbc Controller And Sub-Hbc Circuit Board

    [ III HBC Controller Components ] [4] HBC Controller and Sub-HBC Circuit Board 1. CMB-WM108V-AA, CMB-WM1016V-AA, CMB-WM108V-AB, CMB-WM1016V-AB (1) Control board - 73 - HWE1708A...
  • Page 83 [ III HBC Controller Components ] (2) Power supply circuit board - 74 - HWE1708A...
  • Page 84 [ III HBC Controller Components ] 2. CMB-WM108V-BB, CMB-WM1016V-BB (1) Control board SW 001, 002, 011 CN703 Dip switch Portable charger SWP 01-03 SWU 01, 02 LD 001 CN991 Push switch Address Maintenance LED Battery box CNUSB USB memory connector Indoor-Outdoor transmission terminal block - 75 -...
  • Page 85 [ III HBC Controller Components ] (2) VB board CN991 Battery box - 76 - HWE1708A...
  • Page 86 [ III HBC Controller Components ] (3) SUB PS board CNAC L-N Voltage input 6.3A T FT01, 02 Bus voltage measurement point CNFG Ground - 77 - HWE1708A...
  • Page 87 [ III HBC Controller Components ] - 78 - HWE1708A...

  • Page 88: Electrical Wiring Diagram

    IV Electrical Wiring Diagram [1] Electrical Wiring Diagram of the HBC Controller and Sub-HBC ........81 [2] Electrical Wiring Diagram of Transmission Booster............93 - 79 - HWE1708A...
  • Page 89 - 80 - HWE1708A...

  • Page 90: Electrical Wiring Diagram Of The Hbc Controller And Sub-Hbc

    [ IV Electrical Wiring Diagram ] IV Electrical Wiring Diagram [1] Electrical Wiring Diagram of the HBC Controller and Sub-HBC (1) CMB-WM108V-AA - 81 - HWE1708A...
  • Page 91 [ IV Electrical Wiring Diagram ] (2) CMB-WM108V-AA (Detail of X section) - 82 - HWE1708A...
  • Page 92 [ IV Electrical Wiring Diagram ] (3) CMB-WM1016V-AA - 83 - HWE1708A...
  • Page 93 [ IV Electrical Wiring Diagram ] (4) CMB-WM1016V-AA (Detail of X section) - 84 - HWE1708A...
  • Page 94 [ IV Electrical Wiring Diagram ] (5) CMB-WM108V-AB - 85 - HWE1708A...
  • Page 95 [ IV Electrical Wiring Diagram ] (6) CMB-WM108V-AB (Detail of X section) - 86 - HWE1708A...
  • Page 96 [ IV Electrical Wiring Diagram ] (7) CMB-WM1016V-AB - 87 - HWE1708A...
  • Page 97 [ IV Electrical Wiring Diagram ] (8) CMB-WM1016V-AB (Detail of X section) - 88 - HWE1708A...
  • Page 98 [ IV Electrical Wiring Diagram ] (9) CMB-WM108V-BB - 89 - HWE1708A...
  • Page 99 [ IV Electrical Wiring Diagram ] (10) CMB-WM108V-BB (Detail of X section) - 90 - HWE1708A...
  • Page 100 [ IV Electrical Wiring Diagram ] (11) CMB-WM1016V-BB - 91 - HWE1708A...
  • Page 101 [ IV Electrical Wiring Diagram ] (12) CMB-WM1016V-BB (Detail of X, Y section) - 92 - HWE1708A...

  • Page 102: Electrical Wiring Diagram Of Transmission Booster

    [ IV Electrical Wiring Diagram ] [2] Electrical Wiring Diagram of Transmission Booster 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 Blue...
  • Page 103 [ IV Electrical Wiring Diagram ] - 94 - HWE1708A...

  • Page 104: Refrigerant Circuit

    V Refrigerant Circuit [1] Refrigerant Circuit Diagram ..................... 97 [2] Principal Parts and Functions ..................101 - 95 - HWE1708A...
  • Page 105 - 96 - HWE1708A...

  • Page 106: Refrigerant Circuit Diagram

    [ V Refrigerant Circuit ] V Refrigerant Circuit [1] Refrigerant Circuit Diagram 1. HBC controller (1) CMB-WM108V-AA - 97 - HWE1708A...
  • Page 107 [ V Refrigerant Circuit ] (2) CMB-WM1016V-AA - 98 - HWE1708A...
  • Page 108 [ V Refrigerant Circuit ] 2. Sub-HBC (1) CMB-WM108V-AB Sub-HBC water system Air purge valves VB3a TH31a TH33 VB3b No.1 No.4 TH32 Port TH31b VB3d purge TH31d valves VB3e TH31e VB3f No.5 No.8 Port TH31f VB3h TH31h To HBC (2) CMB-WM1016V-AB Sub-HBC water system Air purge valves...
  • Page 109 [ V Refrigerant Circuit ] (3) CMB-WM108V-BB Sub-HBC water system Valve block Air purge valve VB3a TH31a TH33 VB3b Port TH32 No.1~No.4 TH31b VB3d purge TH31d valve VB3e TH31e VB3f Port No.5~No.8 TH31f VB3h TH31h To Main-HBC (4) CMB-WM1016V-BB Sub-HBC water system Valve block Air purge valve...

  • Page 110: Principal Parts And Functions

    [ V Refrigerant Circuit ] [2] Principal Parts and Functions 1. HBC controller Part name Symbols Notes Usage Specifications Check method Solenoid Refriger- Opens during the cooling mode AC220-240V Continuity check valve ant side and defrost cycle Open when energized/ with a tester closed when de-energized 4-way...
  • Page 111 [ V Refrigerant Circuit ] 2. Sub-HBC Part name Symbols Notes Usage Specifications Check method Thermistor TH31a~p Water Indoor unit circulating water con- Same as the table above TH32, 33 side trol Valve VB3a~p Water 1) Switches the water flow DC12V block side...

  • Page 112: Control

    VI Control [1] Functions and Factory Settings of the Dipswitches ............105 [2] Controlling HBC Controller..................... 106 [3] Operation Flow Chart..................... 115 - 103 - HWE1708A...
  • Page 113 - 104 - HWE1708A...

  • Page 114: Functions And Factory Settings Of The Dipswitches

    [ VI Control ] VI Control [1] Functions and Factory Settings of the Dipswitches 1. Switch functions <HBC controller> (Control board) Function according to switch setting Switch setting tim- Switch Function 1 - 3 Model setting Preset before shipment SV1 ON fixed con- Any time after be- Not available Available...

  • Page 115: Controlling Hbc Controller

    [ VI Control ] [2] Controlling HBC Controller Water pump control -1- Water pump control Depending on the capacity required, temperature difference on the indoor units is controlled so as to be within a certain range. During normal operation, the changes in specified voltage of the water pump corresponding to the capacity of connectable indoor units are shown in the graph below.
  • Page 116 [ VI Control ] 4-way valve control -2- 4-way valve control 4-way valves (21S4M (a, b)) turn on or off according to the operation mode. For 21S4Ma, ON indicates switching to the cooling side and OFF indicates switching to the heating side. For 21S4Mb, ON indicates switching to the heating side and OFF indicates switching to the cooling side.
  • Page 117 [ VI Control ] Water rate valve control -3- Valve block (VB3) water flow rate adjustment Depending on the capacity required, periodic control is performed every one minute to keep the temperature difference be- tween the heat exchanger outlet pipe temperature and indoor unit port pipe temperature within 4.0ºC for cooling and 4.5ºC for heating, and the opening is controlled in the range between 85 and 700 (cooling) or 900 and 1600 (Heating) pulses.
  • Page 118 [ VI Control ] Bypass Control -5- Bypass Control Solenoid valves have two types: (SV1) that bypass the high- and low- pressure sides; LEV (LEV3). They perform the following functions. (1) Bypass solenoid valve (SV1) (ON: open) Operation mode Cooling-only Thermo-ON Always ON Cooling-main Thermo-ON Always OFF...
  • Page 119 [ VI Control ] Defrost Operation Control -7- Defrost Operation Control (1) Defrost cycle type The defrost cycle has following two types: Bypass defrost that is the same method as that used in a CITY MULTI series sys- tem and heat recovery defrost (default) that the heat is collected from the water circuit and the defrost cycle ends early. The following figure shows the refrigerant flow for the bypass defrost.
  • Page 120 [ VI Control ] (3) Defrost cycle Bypass defrost Heat recovery defrost Outdoor Unit Dip switch setting SW3-10 ON SW3-10 OFF Operation mode Heating-only Heating-main Heating-only Heating-main Outdoor unit fre- 103Hz quency Outdoor unit fan Stop SV1a ON (open) SV5b ON (open) 21S4a, 21S4b OFF (closed)
  • Page 121 [ VI Control ] (4) Recovering from Defrost The setting of the dip switch 3-10 determines the defrost method (bypass defrost or heat recovery defrost). As shown in the following flow chart, the bypass defrost may be performed during the heat recovery defrost depending on the operation status.
  • Page 122 [ VI Control ] Refrigerant Recovery Control -8- Refrigerant Recovery Control The refrigerant recovery control function controls the refrigerant flow at the HBC controller during heating operation to keep the refrigerant from collecting inside the HBC controller. It is also performed during cooling operation to prevent an excessive amount of refrigerant from accumulating in the outdoor heat exchanger.
  • Page 123 [ VI Control ] Backup control -9- Backup control The following backup control is started on the HBC as necessary. (1) Backup mode for plate heat exchanger protection The following control is performed depending on the outlet pipe temperature of the plate heat exchanger for freeze-up pro- tection.

  • Page 124: Operation Flow Chart

    [ VI Control ] [3] Operation Flow Chart 1. Mode determination flowchart (1) Indoor unit (cooling, heating, dry, fan mode) Start Normal operation Error Breaker Stop turned on Operation SW turned on *Note 1 1. Protection function self-holding cancelled. 2. HBC controller VB3 fully closed. *Note 2 Remote controller Error mode...
  • Page 125 [ VI Control ] (2) Outdoor unit (cooling only, heating only, cooling main and heating main modes) (Heat source unit) Start Normal operation Error Breaker turned on Unit in the stopped state "HO" / "PLEASE WAIT" blinks *Note 1 on the remote controller Indoor units registered to the remote controller...
  • Page 126 [ VI Control ] (3) HBC controller (cooling only, heating only, cooling main and heating main modes) Start Normal operation Error Breaker turned on Unit in the stopped state Operation command 1. Determination of operation mode Protection function (Cooling only, Heating only, Mixture self-holding cancelled.
  • Page 127 [ VI Control ] 2. Operations in each mode (1) Cooling operation Cooling operation Normal operation During test run mode 4-way valve OFF Unit in the stopped state Indoor unit fan *Note 1 operation Test run mode Thermostat 3-minute restart prevention 1.
  • Page 128 [ VI Control ] (2) Heating operation Normal operation Heating operation Defrost operation *Note 1,2 Unit in the stopped state Defrost operation During test run mode 4-way valve ON 4-way valve OFF Test run mode 1. Indoor unit fan stop 2.
  • Page 129 [ VI Control ] (3) Dry operation Dry operation Normal operation Thermostat ON 4-way valve OFF Unit in the stopped state Test run mode *Note 2 Thermostat ON Suction temperature 18 C[64 F] *Note 1 1. Indoor unit fan stop 1.

  • Page 130: Test Run Mode

    VII Test Run Mode [1] Items to be checked before a Test Run ................. 123 [2] Operating Characteristic and Refrigerant Amount ............124 [3] Adjusting the Refrigerant Amount .................. 124 [4] Refrigerant Amount Adjust Mode................... 128 [5] The following symptoms are normal................128 - 121 - HWE1708A...
  • Page 131 - 122 - HWE1708A...

  • Page 132: Items To Be Checked Before A Test Run

    [ VII Test Run Mode ] VII 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 133: Operating Characteristic And Refrigerant Amount

    [ VII Test Run Mode ] [2] Operating Characteristic and Refrigerant Amount 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. 1.
  • Page 134 [ VII Test Run Mode ] 3. Amount of refrigerant to be added The amount of refrigerant that is shown in the table below is factory-charged to the outdoor units. The amount necessary for extended pipe (field piping) is not included and must be added on site. Outdoor unit model Amount of pre-charged refrigerant Outdoor unit model Amount of pre-charged refrigerant in the outdoor unit (kg)
  • Page 135 [ VII Test Run Mode ] Outdoor unit index Diameter of (Heat source unit model) high-pressure pipe (E)P200 ø15.88 (E)P250 ø19.05 (E)P300 ø19.05 (E)P350 ø19.05 (E)P400 ø15.88 (E)P450 ø19.05 (E)P500 ø19.05 Amount for the HBC controller α (kg) Round up the calculation result to the nearest 0.1kg. (Example: 18.04kg to 18.1kg) (2) Example (3) Sample calculation Outdoor unit...
  • Page 136 [ VII Test Run Mode ] (1) Calculation formula (PURY-(E)M) The amount of refrigerant to be added depends on the size and the length of field piping. (unit in m[ft]) 1) When the distance between HBC and outdoor unit is longer than 10m: Amount of added refrigerant (kg) = (0.09xL )+α...

  • Page 137: Refrigerant Amount Adjust Mode

    [ VII Test Run Mode ] [4] Refrigerant Amount Adjust Mode On the model of unit described in this document, the refrigerant charge cannot be adjusted. [5] The following symptoms are normal. Remote controller Symptoms Cause display The auto vane adjusts its posi- After an hour of cooling operation with the auto vane in the vertical posi- tion by itself.

  • Page 138: Troubleshooting

    VIII Troubleshooting [1] Error Code Lists ......................131 [2] Responding to Error Display on the Remote Controller..........135 [3] Investigation of Transmission Wave Shape/Noise............183 [4] Troubleshooting Principal Parts ..................186 [5] Refrigerant Leak ......................198 [6] Servicing the HBC controller..................200 [7] Instructions for debris removal operation...............
  • Page 139 - 130 - HWE1708A...

  • Page 140: Error Code Lists

    [ VIII Troubleshooting ] VIII Troubleshooting [1] Error Code Lists Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code 2500 Drain sensor submergence 2501 Water pump error Drain pump fault (float switch) 2502 Untightened manual air vent valve 2503...
  • Page 141 [ VIII Troubleshooting ] Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code Temperature sensor 1st port returned water 5141 − − fault temp. (TH31a) (HBC controller) 2nd port returned water 5142 −...
  • Page 142 [ VIII Troubleshooting ] Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code Temperature sensor 1st port returned water 5161 fault temp. (TH31a) (Sub-HBC) 2nd port returned water 5162 temp. (TH31b) 3rd port returned water 5163 temp.
  • Page 143 [ VIII Troubleshooting ] Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code 6601 Polarity setting error 6602 Transmission processor hardware error 6603 Transmission line bus busy error Communication error between device and trans- 6606 mission processors 6607...

  • Page 144: Responding To Error Display On The Remote Controller

    [ VIII Troubleshooting ] [2] Responding to Error Display on the Remote Controller 2500 1. Error Code 2500 Drain sensor submergence (Models with a drain sensor) 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 145 [ VIII Troubleshooting ] 1. Error Code 2500 Drain sensor submergence (Models with a float switch) 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 146 [ VIII Troubleshooting ] 2501 1. Error Code 2501 Water pump fault 2. Error definition and error detection method When clogged water circuit or water leaks from the water circuit is detected, the water pump is stopped for protection. When the following statuses are detected, the pump will be stopped. The revolutions of the water pump exceeds the specific range.
  • Page 147 [ VIII Troubleshooting ] 2502 1. Error Code 2502 Drain pump fault (Models with a drain sensor) 2. Error definition and error detection method 1) Make the drain sensor thermistor self-heat. If the temperature rise is small, it is interpreted that the sensor is immersed in water.
  • Page 148 [ VIII Troubleshooting ] 1. Error Code 2502 Drain pump fault (Models with a float switch) 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 149 [ VIII Troubleshooting ] 2503 1. Error Code 2503 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 150 [ VIII Troubleshooting ] 2512 1. Error Code 2512 Valve block fault 2. Error definition and error detection method Limit signal that is output from valve block is not detected or is not reset after it is detected. 3. Cause, check method and remedy Cause Check method and remedy Loose connectors, wiring fault...
  • Page 151 [ VIII Troubleshooting ] 4102 1. Error Code 4102 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. The open phase of the power supply may not always be detected if a power voltage from another circuit is applied.
  • Page 152 [ VIII Troubleshooting ] 4106 1. Error Code 4106 <Transmission power supply fault Error detail code FF (Outdoor unit)> 2. Error definition and error detection method Transmission power output failure 3. Cause 1) Wiring failure 2) Transmission power supply cannot output voltage because overcurrent was detected. 3) Voltage cannot be output due to transmission power supply problem.
  • Page 153 [ VIII Troubleshooting ] 4115 1. Error Code 4115 Power supply signal sync error 2. Error definition and error detection method The frequency cannot be determined when the power is switched on. 3. Cause, check method and remedy Cause Check method and remedy Power supply error Check the voltage of the power supply terminal block (TB1).
  • Page 154 [ VIII Troubleshooting ] 5111,5112,5115,5116 1. Error Code 5111 5116 Temperature sensor fault (HBC controller) (TH11~TH16) 5132 5135 Temperature sensor fault (HBC controller) (TH32~TH35) 5141 5156 Temperature sensor fault (HBC controller) (TH31a~TH31p) 5161 5176 Temperature sensor fault (Sub-HBC) (TH31a~TH31p) 5177 5178 Temperature sensor fault (Sub-HBC) (TH32~TH33) 2.
  • Page 155 [ VIII Troubleshooting ] 5201 1. Error Code 5201 High-pressure sensor fault (Outdoor unit 63HS1/HBC controller PS) 2. Error definition and error detection method When a pressure sensor reading of 4.06 MPa [589 psi] or above is detected, error codes "5201" and "5203" will appear. The unit will continue its operation by using other sensors as a backup.
  • Page 156 [ VIII Troubleshooting ] 5301 1. Error Code 5301 ACCT sensor fault (Detail code 115) 2. Error definition and error detection method When the formula "output current < 1.5 Arms" remains satisfied for 10 seconds while the inverter is in operation. 3.
  • Page 157 [ VIII Troubleshooting ] 1. Error Code 5301 Open-circuited IPM/Loose ACCT connector (Detail code 119) 2. Error definition and error detection method Presence of enough current cannot be detected during the self-diagnostic operation immediately before inverter startup. 3. Cause, check method and remedy Cause Check method and remedy Inverter output wiring problem...
  • Page 158 [ VIII Troubleshooting ] 5701 1. Error Code 5701 Loose float switch connector 2. Error definition and error detection method Detection of the disconnected float switch (open-phase condition) during operation 3. Cause, check method and remedy (1) CN4F disconnection or contact failure Check for disconnection of the connector (CN4F) on the indoor unit control board.
  • Page 159 [ VIII Troubleshooting ] 6602 1. Error Code 6602 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. The address/attribute appeared on the display on the remote controller indicates the controller where an error oc- curred.
  • Page 160 [ VIII Troubleshooting ] 6603 1. Error Code 6603 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 The address/attribute appeared on the display on the remote controller indicates the controller where an error oc- curred.
  • Page 161 [ VIII Troubleshooting ] 6607 1. Error Code 6607 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 [ VIII Troubleshooting ] 1. Error Code 6607 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 163 [ VIII Troubleshooting ] 1. Error Code 6607 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 [ VIII Troubleshooting ] 1. Error Code 6607 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 [ VIII Troubleshooting ] 1. Error Code 6607 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 [ VIII Troubleshooting ] 1. Error Code 6607 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 [ VIII Troubleshooting ] 1. Error Code 6607 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 [ VIII Troubleshooting ] 1. Error Code 6607 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 169 [ VIII Troubleshooting ] 1. Error Code 6607 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 170 [ VIII Troubleshooting ] 6608 1. Error Code 6608 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. The address/attribute appeared on the display on the remote controller indicates the controller where an error oc- curred.
  • Page 171 [ VIII Troubleshooting ] 7100 1. Error Code 7100 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. Error source, cause, check method and remedy, Error source Cause Check method and remedy...
  • Page 172 [ VIII Troubleshooting ] 7101 1. Error Code 7101 Capacity code setting error 2. Error definition and error detection method Connection of incompatible (wrong capacity code) indoor unit or outdoor unit 3. Error source, cause, check method and remedy Error source Cause Check method and remedy Outdoor unit...
  • Page 173 [ VIII Troubleshooting ] 7102 1. Error Code 7102 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. Error source, cause, check method and remedy Error source Cause Check method and remedy...
  • Page 174 [ VIII Troubleshooting ] 7105 1. Error Code 7105 Address setting error 2. Error definition and error detection method Erroneous setting of OC unit address Erroneous setting of BC controller address 3. Cause, check method and remedy Error source Cause Check method and remedy Outdoor unit Erroneous setting of OC unit address...
  • Page 175 [ VIII Troubleshooting ] 7107 1. Error Code 7107 Port setting error 2. Error definition and error detection method The port with wrong number is connected to the indoor unit.The model total connected to the port is greater than the specifi- cation.
  • Page 176 [ VIII Troubleshooting ] 7110 1. Error Code 7110 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 177 [ VIII Troubleshooting ] 7113 1. Error Code 7113 Function setting error (incorrect resistor connection) 2. Error source, cause, check method and remedy Error source Cause Check method and remedy Outdoor unit Wiring fault (Detail code 15) Loose connectors, short-circuit, con- Check the connector CNTYP5 on the control board for tact failure proper connection.
  • Page 178 [ VIII Troubleshooting ] 7117 1. Error Code 7117 Model setting error 2. Error source, cause, check method and remedy Error source Cause Check method and remedy Outdoor unit Wiring fault (Detail code 15) Loose connectors, short-circuit, con- Check the connector CNTYP5 on the control board for tact failure proper connection.
  • Page 179 [ VIII Troubleshooting ] Troubleshooting according to the remote controller malfunction or the external input error In the case of MA remote controller -1- Troubleshooting according to the remote controller malfunction or the external input error In the case of MA remote controller 1.
  • Page 180 [ VIII Troubleshooting ] In the case of MA remote controller 2. 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. (1) Cause 1) The power for the M-NET transmission line is not supplied from the outdoor unit.
  • Page 181 [ VIII Troubleshooting ] In the case of MA remote controller 3. Phenomena "HO" or "PLEASE WAIT" display on the remote controller does not disappear, and no operation is performed even if the button is pressed. ("HO" or "PLEASE WAIT" display will normally turn off 5 minutes later after the power on.) (1) Cause 1) The power for the M-NET transmission line is not supplied from the outdoor unit.
  • Page 182 [ VIII Troubleshooting ] Flow chart Even if the operation button on the remote controller is pressed, the indoor and the outdoor units do not start running. - 173 - HWE1708A...
  • Page 183 [ VIII Troubleshooting ] Troubleshooting according to the remote controller malfunction or the external input error In case of ME remote controller In case of ME remote controller 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 does not appear on the screen.) (1) Cause...
  • Page 184 [ VIII Troubleshooting ] In case of ME remote controller 2. Phenomena When the remote controller operation SW is turned on, a temporary operation display is indicated, and the display lights out immediately. (1) Cause 1) The power is not supplied to the indoor unit. The main power of the indoor unit (AC220V) is not on.
  • Page 185 [ VIII Troubleshooting ] In case of ME remote controller 3. Phenomena "HO" display on the remote controller does not disappear, and no operation is performed even if the button is pressed. (1) Cause Without using MELANS 1) Outdoor unit address is set to "00" 2) A wrong address is set.
  • Page 186 [ VIII Troubleshooting ] In case of ME remote controller 4. Phenomena "88" appears on the remote controller when the address is registered or confirmed. (1) Cause, check method and remedy Cause Check method and remedy An error occurs when the address is registered or con- firmed.
  • Page 187 [ VIII Troubleshooting ] Troubleshooting according to the remote controller malfunction or the external input error Both for MA remote controller and ME remote controller Both for MA remote controller and ME remote controller 1. Phenomena Although cooling operation starts with the normal remote controller display, the capacity is not enough (1) Cause, check method and remedy Cause Check method and remedy...
  • Page 188 [ VIII Troubleshooting ] Cause Check method and remedy RPM error of the outdoor unit FAN Refer to the page on troubleshooting of the outdoor unit fan in outdoor unit service handbook Motor failure or board failure, or airflow rate de- Refer to 5106 in outdoor unit service handbook crease due to clogging of the heat exchanger Refer to 1302 in outdoor unit service handbook...
  • Page 189 [ VIII Troubleshooting ] 2. Phenomena Although heating operation starts with the normal remote controller display, the capacity is not enough. (1) Cause, check method and remedy Cause Check method and remedy Compressor frequency does not rise sufficiently. Check pressure difference between the detected pressure by the pressure sensor and the actual Faulty detection of pressure sensor.
  • Page 190 [ VIII Troubleshooting ] Cause Check method and remedy HBC controller LEV1 and 2 actuation failure Refer to the page of LEV troubleshooting ([4] -1-). Sufficient hot water is not supplied on the HBC con- (page 186) troller due to HBC controller LEVI, 2, and 3 actuation failure.
  • Page 191 [ VIII Troubleshooting ] 3. Phenomena Outdoor unit stops at times during operation. (1) 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 192: Investigation Of Transmission Wave Shape/Noise

    [ VIII Troubleshooting ] [3] Investigation of Transmission Wave Shape/Noise 1. M-NET transmission 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 193 [ VIII Troubleshooting ] (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. The transmission line and Isolate the transmission line from the power line (5cm [1-31/32"] or work is performed ac- the power line are not...
  • Page 194 [ VIII Troubleshooting ] 2. MA remote controller transmission 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 195: Troubleshooting Principal Parts

    [ VIII Troubleshooting ] [4] Troubleshooting Principal Parts -1- LEV LEV operation HBC controller LEVI, 2, and 3 (linear expansion valves) are driven by the pulse signal from the control board and are controlled by a stepping motor. (1) HBC controller LEV The valve opening changes according to the number of pulses.
  • Page 196 [ VIII Troubleshooting ] (2) 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 197 [ VIII Troubleshooting ] Troubleshooting Principal Parts of HBC Controller -2- Troubleshooting Principal Parts of HBC Controller 1. Pressure sensor Troubleshooting flow chart for pressure sensor START Check the connectors on pressure sensor P1 for proper connections. Repair the fault. Operating at the moment? Note 1 On the self-diagnosis monitor, measure...
  • Page 198 [ VIII Troubleshooting ] 1) Check the self-diagnosis switch (Outdoor control board SW4 (SW6-10:OFF)). Measurement data Symbol SW4 setting value Outdoor high pressure 63HS1 9 10 Outdoor low pressure 63LS 9 10 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 2) Check CNP1 connector on the HBC controller control board for proper connections.
  • Page 199 [ VIII Troubleshooting ] 2. Temperature sensor Troubleshooting instructions for thermistor START Note 1 Pull out the thermistor connector in trouble from the board. Note 2 Measure the temperature of the thermistor in trouble. (actual measurement value) Note 2 Check the thermistor resistor. Compare the temperature corresponding to the resistance measured by the thermistor and the temperature measured by a commercially...
  • Page 200 [ VIII Troubleshooting ] 3. Troubleshooting flow chart for LEV, Solenoid valve, and Valve block (1) LEV No cooling capacity No heating capacity Check whether the electric expansion valve and the solenoid valve connector are not disconnected or not loose. Fault is found.
  • Page 201 [ VIII Troubleshooting ] Troubleshooting flow chart for solenoid valve body Start Check for pins not fully inserted on the connector and check the colors of the lead wires visually. Intermediate connector Control board When LEV is fully closed : tick sound When LEV is fully open : no sound Brown Brown...
  • Page 202 [ VIII Troubleshooting ] Control Circuit -3- Control Circuit (1) Control power source function block 1) PURY-(E)M***YNW-A/PURY-(E)P***YNW-A Power supply system (380-415 VAC) Control system (5-30 VDC) Noise filter board Inverter board Noise filter Smoothing capacitor Compressor Rectifier Inverter AC Power source Fuse Inverter Fuse...
  • Page 203 [ VIII Troubleshooting ] 2) PURY-(E)P***YLM-A Power source system (AC 380 / 415 V) Control system (DC 5 ~ 30 V) INV board Noise filter Compressor Rectifier Smoothing capacitor Inverter Noise filter AC 380/ 415V Fuse Terminal block for Inverter drive Fuse 17V Power supply power source...
  • Page 204 [ VIII Troubleshooting ] (2) Troubleshooting transmission power circuit of outdoor unit 1) PURY-(E)M***YNW-A/PURY-(E)P***YLM-A 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 205 [ VIII Troubleshooting ] 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 206 [ VIII Troubleshooting ] 2) PURY-(E)P***YLM-A Check the voltage at the indoor/outdoor transmission terminal block (TB3) of outdoor 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. DC 24 ~ 30 V Check if the indoor/outdoor transmission line is not short-circuited, and repair the problem.

  • Page 207: Refrigerant Leak

    [ VIII Troubleshooting ] [5] Refrigerant Leak 1. Leak spot: In the case of extension pipes and HBC controller (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 high-pressure side refrigerant service valve (BV2) on the outdoor unit while the com- pressor is being stopped.
  • Page 208 [ VIII Troubleshooting ] 3. Leak spot: In the case of extension pipe and HBC controller (Heating season) (1) Run all the indoor units in heating test run mode. 1) To run the indoor unit in test run mode, set SW4 (769) on the outdoor unit control board to ON. 2) Change the setting of the remote controller for all the indoor units to the heating mode.

  • Page 209: Servicing The Hbc Controller

    [ VIII Troubleshooting ] [6] Servicing the HBC controller 3-way valve 1. Valve block VB3 (valve block) is driven by the pulse signal from the HBC controller control board and are controlled by a stepping motor. 1) HBC controller control board and valve block (VB3) Circuit board Microcomputer Limit signal...
  • Page 210 [ VIII Troubleshooting ] 3) Opening and closing of the valve Cooling Heating Closing Opening the valve the valve Opening Closing the valve the valve 1600 Number of pulses Water pump 2. Water pump Check the connector and make sure that it is connected properly. Check the driving power supply, control power supply for the pumps internal board, and check the control signal voltage by connecting each voltage to ground.

  • Page 211: Instructions For Debris Removal Operation

    [ VIII Troubleshooting ] [7] Instructions for debris removal operation This operation removes the debris that may have been introduced during installation from the water circuit. Perform this operation after completion of water- and refrigerant-piping work, air tightness test, evacuation of refrigerant circuits, refrigerant charging, and electrical work.

  • Page 212: Instructions For The Air Vent Operation

    [ VIII Troubleshooting ] [8] Instructions for the air vent operation This operation removes the air that remains after water is supplied to the water circuit. Perform this operation after completion of water- and refrigerant-piping work, air tightness test, evacuation of refrigerant circuits, and refrigerant charging (and debris removal, if performed).

  • Page 213: Instructions For The Water Pump Replacement

    [ VIII Troubleshooting ] [9] Instructions for the water pump replacement 1.After turning off the power to the HBC controller, replace the water pump. To stop the water flow from the indoor unit, perform the following DIPSW operations. When replacing the water pump near the water supply port, set DIPSW4-6 to ON (DIPSW4-7 to OFF). When replacing the other water pump, set DIPSW4-6 and DIPSW4-7 to ON.
  • Page 214 [ VIII Troubleshooting ] Replacement procedures for each service part 1. Solenoid valve coil (SV1) Operation Operation procedures Illustrations location (1) Remove the four fixing screws from the In ceiling space service panel (right) and then remove the service panel (right). Service panel (top right) (2) Remove the two fixing screws from the...
  • Page 215 [ VIII Troubleshooting ] 3. LEV coils (LEV1, LEV2, LEV3) Operation Operation procedures Illustrations location (1) Remove four fixing screws from the ser- In ceiling space vice panel (right) and then remove the service panel (right). (2) Disconnect the corresponding LEV coil connectors from the control board.
  • Page 216 [ VIII Troubleshooting ] 5. Valve block Operation Operation procedures Illustrations location (1) Collect the refrigerant and water and Below ceiling then carry out the unit from the ceiling T pipe space. Branch pipes (2) Remove all of the service panels (top, front, and back).
  • Page 217 [ VIII Troubleshooting ] Operation Operation procedures Illustrations location (11) Remove the 8 fixing screws of the Below ceiling plates supporting the valve block shown in the figure. Remove the fixing screws of the valve block supporting plate (12) Remove the 8 screws securing the Remove the valve valve block and then replace the valve block fixing screws...
  • Page 218 [ VIII Troubleshooting ] 6. Solenoid valve and LEV body Operation Operation procedures Illustrations location (1) Collect the refrigerant and water and Below ceiling then carry out the unit from the ceiling Service panel (top right) space. (2) Remove the four fixing screws from the Solenoid valve service panel (right) and then remove the service panel (right).
  • Page 219 (Applicable to CMB- WM108V-AA only) (4) Slide the control box to the left until the strainer is visible (Approx. 150 mm). (Applicable to CMB-WM108V-AA only) Strainer body Control box Slide the control box. (5) Using the supplied spanner plate, open Supplied spanner plate the cover at the bottom of the strainer.
  • Page 220 [ VIII Troubleshooting ] 8. Pump (right side of control box) Operation Operation procedures Illustrations location (1) Remove the four fixing screws from the In ceiling Service panel (top left) space service panel (right) and then remove the service panel (right). (2) Remove the two fixing screws from the service panel (top left) and then remove Pump...
  • Page 221 [ VIII Troubleshooting ] 9. Pump (left side of control box) Operation Operation procedures Illustrations location (1) Remove the four fixing screws from the In ceiling Service panel (top left) space service panel (left) and then remove the service panel (left). Pump (2) Remove the two fixing screws from the service panel (top left) and then remove...
  • Page 222 [ VIII Troubleshooting ] 10. Thermistor (TH31) Operation Operation procedures Illustrations location (1) Remove the two fixing screws from the In ceiling Service panel (top left) Service panel (top right) space service panel (top right) and then re- move the service panel (top right). (2) Remove the two fixing screws from the service panel (top left) and then remove the service panel (top left).
  • Page 223 [ VIII Troubleshooting ] 12. Thermistors (TH11, TH13, TH32, and TH35) Operation Operation procedures Illustrations location (1) Disconnect the connectors of the therm- In ceiling space istor to be replaced from the control board. TH35 (2) Remove the four fixing screws from the service panel (left) and then remove the service panel (left).
  • Page 224 [ VIII Troubleshooting ] 14. 4-way valve body (21S4) Operation Operation procedures Illustrations location (1) 1.Perform the operation as described in Below ceiling (1) to (8) of 5. (2) Debraze the three places indicated in the figure and then replace the 4-way valve with a service part.
  • Page 225 [ VIII Troubleshooting ] 16. Plate heat exchanger (heating-main side) Operation Operation procedures Illustrations location (1) Perform the work as described in (1) to Below Branch pipes ceiling (8) of 5. (2) Remove the clips connecting the pipes in the two places shown in the figure and then remove the branch pipes in the up- ward direction.
  • Page 226 [ VIII Troubleshooting ] 18. Pressure sensor (PS3) Operation Operation procedures Illustrations location (1) Perform the work as described in (1) to Below ceiling (8) of 5. Heat insulation material (2) Cut the cable ties securing the heat in- sulation material indicated in the figure and then remove the heat insulation ma- terial.
  • Page 227 [ VIII Troubleshooting ] 20. Water pressure protection valve Operation Operation procedures Illustrations location (1) Remove the two fixing screws from the In ceiling space service panel (top left) and then remove Service panel (top leftt) the service panel (top left). Service panel (left) (2) Remove the cover above the water pressure protection valve (...
  • Page 228 [ VIII Troubleshooting ] 21. Water purge valve and air purge valve Operation Operation procedures Illustrations location (1) Remove the four fixing screws from the In ceiling space service panel (right) and then remove Air purge valve (left) Air purge valve (right) the service panel (right).

  • Page 229: Sub-Hbc Maintenance Instructions (Cmb-Wm108,1016V-Bb)

    [ VIII Troubleshooting ] [10] Sub-HBC Maintenance Instructions (CMB-WM108,1016V-BB) 1. Valve Block Assembly Replacement Procedure Operation Operation procedures Illustrations location 1) Drain water from the system, and move Under the ceiling the unit out of the ceiling space. 2) Unscrew all screws from the service Service panel (top left) panels (top, front, back, left), and re- Service panel (top right)
  • Page 230 [ VIII Troubleshooting ] Operation Operation procedures Illustrations location 6) Unscrew the fixing screws (x3) on each Under the Hanging brackets ceiling hanging bracket (x4), and remove the hanging brackets. 7) Unscrew the fixing screws each (x4) on the right and left panels, and remove the right and left panels.
  • Page 231 [ VIII Troubleshooting ] 2. Thermistor (TH31) Replacement Procedure Operation Operation procedures Illustrations location 1) Unscrew the fixing screws (x4) on the Above the Service panel (top left) ceiling service panel (right), and remove the service panel (right). 2) Unscrew the fixing screws (x2) on the service panel (top left), and remove the service panel (top left).
  • Page 232 [ VIII Troubleshooting ] 3. Thermistor (TH32, TH33) Replacement Procedure Operation Operation procedures Illustrations location 1) Unscrew the fixing screws (x4) on the Above the Service panel (top right) Service panel (top left) ceiling service panel (right), and remove the service panel (right).
  • Page 233 [ VIII Troubleshooting ] 4. Air Vent Valve Replacement Procedure Operation Operation procedures Illustrations location 1) Unscrew the fixing screws (x4) on the Above the Air vent valve ceiling service panel (right), and remove the service panel (right). 2) Cut the cable tie that is holding the PVC tube.

  • Page 234: Led Monitor Display On The Outdoor Unit Board

    IX LED Monitor Display on the Outdoor Unit Board [1] How to Read the LED on the Service Monitor ............... 227 - 225 - HWE1708A...
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  • Page 236: How To Read The Led On The Service Monitor

    [ IX LED Monitor Display on the Outdoor Unit Board ] IX LED Monitor Display on the Outdoor Unit Board [1] How to Read the LED on the Service Monitor -1- Outdoor unit board 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 237 [ IX LED Monitor Display on the Outdoor Unit Board ] 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...
  • Page 238 [ IX LED Monitor Display on the Outdoor Unit Board ] 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 239 [ IX LED Monitor Display on the Outdoor Unit Board ] -2- HBC controller/Sub-HBC board 1. How to read the LED The operation status of the unit can be monitored on the service monitor. The service monitor uses 4-digit 7-segment LED to display flags. There are no check items using dipswitch settings.
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  • Page 297 Related Links Model Number: CMB-WM108V-AA City Multi Hybrid Branch Controllers Product Information Sheet CMB-WM108-1016-AA(B)_InstallationManual_WT08892X03 CMB-WM108-1016V-A(A)(B) Data Book (MEES18K069) CMB-WM108-1016V-AA Declaration of Conformity CMB-WM108-1016V-AA(BB) Service Manual (HWE1708A) CMB-WM108-1016V-AA_PartsList_BWE021520 Durham University, R32 Hybrid VRF Horizontal HBC Controllers (HVRF) Product Information Sheet HVRF_Information_Pack_Ver2.0_...

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