Page 2 Safety Precautions Read and observe the safety precautions below and the instructions provided on the labels affixed to the unit. Retain this manual for future reference. Make sure that this manual is passed on to the end users. All refrigerant piping work, electrical work, air-tightness test, and brazing work must be performed by qualified personnel. Incorrect use may result in serious injury.
Page 3 To reduce the risk of electric shock, smoke, To reduce the risk of injury from units falling and fire due to infiltration of dust and water, or falling over, periodically check the instal- properly install all required covers. lation base for damage. To reduce the risk of electric shock, smoke, Consult an authorized agency for the proper and fire due to infiltration of dust and water,...
Page 4 Any additional parts must be installed by of leaking flammable gas. the dealer or qualified personnel. Only use the parts specified by Mitsubishi Electric. If flammable gas accumulates around the Installation by unauthorized personnel or unit, it may ignite and cause a fire or explo- use of unauthorized parts or accessories sion.
Page 5 Do not install the unit over things that are To reduce the risk of damage to the unit and vulnerable to water damage. Provide an ad- resultant electric leak and electric shock, equate collective drainage system for the keep small animals, snow, and rain water drain water from unit as necessary.
Page 6 To reduce the risk of pipe bursting and ex- To reduce the risk of water leakage and re- plosion due to abnormal pressure rise, do sultant damage to the furnishings, drain not allow any substances other than R410A piping work must be performed by your (such as air) to enter the refrigerant circuit.
Page 7 Relocation and Repairs To reduce the risk of refrigerant leakage, To reduce the risk of wire shorting, electric water leakage, injury, electric shock, and leak, electric shock, smoke, or fire, do not fire, units should only be moved or repaired perform maintenance work in the rain.
Page 8 Keep dust, dirt, and water off charging hose Charge the system with an appropriate and flare tool. Infiltration of dust, dirt, or wa- amount of refrigerant in the liquid phase. ter into the refrigerant circuit may cause the Refer to the relevant sections in the manu- refrigerant oil to deteriorate or damage the als to calculate the appropriate amount of compressor.
Page 9 viii...
Page 10: 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 ........................6 [5] Pipe Processing........................6 [6] Brazing............................7 [7] Air Tightness Test (Refrigerant Circuit) ..................8 [8] Vacuum Drying (Evacuation) (Refrigerant Circuit)..............
Page 11 HWE2206A...
Page 12 I Read Before Servicing [1] Read Before Servicing ....................... 3 [2] Necessary Tools and Materials..................4 [3] Piping Materials ......................... 5 [4] Storage of Piping ....................... 6 [5] Pipe Processing ......................... 6 [6] Brazing..........................7 [7] Air Tightness Test (Refrigerant Circuit)................8 [8] Vacuum Drying (Evacuation) (Refrigerant Circuit).............
Page 13 HWE2206A - 2 -...
Page 14: 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 (E)P-YNU/TNU series: R410A CITY MULTI R2 P-ZKMU series: R410A CITY MULTI WR2 P-YLMU/TLMU/ZLMU series: R410A ...
Page 15: 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 (Adaptability of tools that are for use with R22 or R407C) 1.
Page 16: Piping Materials
[ I Read Before Servicing ] [3] Piping Materials Do not use the existing piping! 1. Copper pipe materials Annealed Soft copper pipes (annealed copper pipes). They can easily be bent with hands. Drawn Hard copper pipes (straight pipes). They are stronger than the Annealed at the same radial thickness.
Page 17: 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 18: 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 19: Air Tightness Test (Refrigerant Circuit)
[ I Read Before Servicing ] [7] Air Tightness Test (Refrigerant Circuit) Note that a refrigerant leak detector for R22 will not detect an R410A leak. Halide torch R22 leakage detector 1. Items to be strictly observed Pressurize the equipment with nitrogen up to the design pressure (4.15MPa[601psi]), and then judge the equipment's air tight- ness, taking temperature variations into account.
Page 20: 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 21 [ I Read Before Servicing ] 6. Special vacuum drying When 5 Torr (650 Pa) or lower degree of vacuum cannot be attained after 3 hours of evacuation, it is likely that water has penetrated the system or that there is a leak. If water infiltrates the system, break the vacuum with nitrogen.
Page 22: 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 Valve Valve liquid liquid 1. Reasons R410A is a pseudo-azeotropic HFC blend (boiling point R32=-52°C[-62°F], R125=-49°C[-52°F]) and can almost be handled the same way as a single refrigerant, such as R22.
Page 23: 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, 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 24: Notes On Refrigerating Machine Oil
[ I Read Before Servicing ] [12] 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 25: Water Piping
[ I Read Before Servicing ] [13] 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.
Page 26 [ 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 27 [ 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 28: Restrictions
II Restrictions [1] System configuration ....................... 19 [2] Switch Settings and Address Settings ................21 [3] An Example of a System to which an MA Remote Controller is connected..... 23 [4] An Example of a System to which an ME Remote Controller is connected..... 29 [5] An Example of a System to which both MA Remote Controller and ME Remote Controller are connected................
Page 29 HWE2206A - 18 -...
Page 30: System Configuration
Maximum number HBC controller Types of connectable Outdoor units of connectable indoor of connectable Sub-HBC controller indoor units units indoor units P72T/YNU-A CMB-WP108NU-AA, 36-108 W06-W48 models CMB-WP1016NU-AA Indoor units for use with P96T/YNU-A 48-144 CMB-WP108NU-AB, HBC controller CMB-WP1016NU-AB P120T/YNU-A 60-180...
Page 31 Maximum number HBC controller Types of connectable Outdoor units of connectable indoor of connectable Sub-HBC controller indoor units units indoor units P72T/Y/ZLMU-A1 CMB-WP108NU-AA, 36-108 W06-W48 models CMB-WP1016NU-AA Indoor units for use with P96T/Y/ZLMU-A1 48-144 CMB-WP108NU-AB, HBC controller CMB-WP1016NU-AB P120T/Y/ZLMU-A1 60-180...
Page 32: Switch Settings And Address Settings
[ II Restrictions ] [2] Switch Settings and Address Settings 1. Switch setting Refer to section "[3] An Example of a System to which an MA Remote Controller is connected - [5] An Example of a System to which both MA Remote Controller and ME Remote Controller are connected" before performing wiring work. Set the switches while the power is turned off.
Page 33 [ II Restrictions ] 2. 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 Setting method Factory setting address range setting CITY MULTI...
Page 34: An Example Of A System To Which An Ma Remote Controller Is Connected
[ II Restrictions ] [3] An Example of a System to which an MA Remote Controller is connected 1. System with one outdoor unit (Heat source unit) (automatic address setup for both indoor and outdoor units) (1) Sample control wiring Interlock operation with the ventilation unit Leave the male...
Page 35 [ II Restrictions ] (4) Wiring method 3) MA remote controller wiring Connect terminals 1 and 2 on the terminal block for MA 1) Indoor/outdoor transmission line remote controller line (TB15) on the indoor unit (IC) to the Daisy-chain terminals M1 and M2 of the terminal block terminal block on the MA remote controller (MA).
Page 36 [ II Restrictions ] 2. A system in which a system controller is connected to the transmission line for centralized control and which is pow- ered from an outdoor unit (1) Sample control wiring Interlock operation with the ventilation unit Move the male connector from CN41 to CN40.
Page 37 [ II Restrictions ] (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 the system controller, OC with the shield of the shielded cable. for indoor-outdoor transmission line (TB3) on the outdoor Short-circuit the earth terminal ( ) and the S terminal on the...
Page 38 [ II Restrictions ] 3. An example of a system in which a system controller is connected to the indoor-outdoor transmission line (except LM adapter) (1) Sample control wiring Interlock operation with the ventilation unit CN41 CN40 Replace SW5-1 OFF ON Group Group Group...
Page 39 [ II Restrictions ] Only use shielded cables. (4) Wiring method Shielded cable connection 1) Indoor/outdoor transmission line Daisy-chain the S terminal on the terminal block (TB7) on the out- door unit (OC) with the shield wire of the shielded cable. Short-circuit Daisy-chain terminals M1 and M2 of the terminal block for indoor- the earth terminal ( ) and the S terminal on the terminal block...
Page 40: An Example Of A System To Which An Me Remote Controller Is Connected
[ II Restrictions ] [4] An Example of a System to which an ME Remote Controller is connected (1) Sample control wiring Interlock operation with the ventilation unit Move the male connector from CN41 to CN40. SW5-1 OFF ON Group Group Group TB02...
Page 41 [ II Restrictions ] door-outdoor transmission line. (4) Wiring method When 2 remote controllers are connected to the sys- 1) Indoor/outdoor transmission line Same as [3] 2. Refer to the section on Switch Setting. Shielded cable connection Performing a group operation (including the group operation of units in different refrigerant circuits).
Page 42: An Example Of A System To Which Both Ma Remote Controller And Me Remote Controller Are Connected
[ II Restrictions ] [5] An Example of a System to which both MA Remote Controller and ME Remote Controller are connected (1) Sample control wiring Move the male connector from CN41 to CN40. Group Group SW5-1 OFF ON TB15 TB15 TB15 TB02...
Page 43 [ II Restrictions ] (3) Maximum allowable length (4) Wiring method 1) Indoor/outdoor transmission line 1) Indoor/outdoor transmission line Same as [3] 2. Same as [3] 2. 2) Transmission line for centralized control Shielded cable connection Same as [3] 2. Same as [3] 2.
Page 44 [ II Restrictions ] (5) Address setting method Pro- dress Facto- Unit or controller set- Setting method Notes ry set- dure ting ting range Assign the smallest address to Assign an address smaller than that of Opera- Main 01 to the main unit in the group.
Page 45: Restrictions On Pipe Length
[ II Restrictions ] [6] Restrictions on Pipe Length CMB-WP108NU-AA + CMB-WP108NU-AB (CMB-WP1016NU-AA) (CMB-WP1016NU-AB) (~(E)P120) HBC controller (Main HBC) HBC controller (Sub HBC) Branch joint (field supply) (WL06~WL30) Max. 3 sets for 1 port. Total capacity < = WL30 Junction pipe (field supply)
Page 46 [ II Restrictions ] CMB-WP108NU-AA + CMB-WP108NU-AB (CMB-WP1016NU-AA) (CMB-WP1016NU-AB) HBC controller (Main HBC) HBC controller (Sub HBC) Branch joint (field supply) (WL06-WL30) Max. 3 sets for 1 port. Total capacity < = WL30 Junction pipe (field supply) HU: Heat source unit, IU: Indoor unit...
Page 47 [ II Restrictions ] Pump 2 circuit Pump 1 circuit Pump 2 circuit Pump 1 circuit 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: WL30 Maximum number of connectable indoor units: 3 units Branch joints are field-supplied.
Page 48 ø15.88 [5/8] ø19.05 [3/4] PURY-(E)P72T/YNU (Brazing) (Brazing) (HBC controller) Outdoor ø19.05 [3/4] ø22.2 [7/8] PURY-(E)P96T/YNU CMB-WP108NU-AA Unit side (Brazing) (Brazing) CMB-WP1016NU-AA ø19.05 [3/4] ø28.58 [1-1/8] PURY-(E)P120T/YNU (Brazing) (Brazing) *1. PURY-(E)P-144T/YNU model or larger requires a connection of two main-HBC controllers in parallel.
Page 49 ø15.88 [5/8] ø19.05 [3/4] PURY-P72ZKMU (Brazing) (Brazing) (HBC controller) Outdoor ø19.05 [3/4] ø22.2 [7/8] CMB-WP108NU-AA PURY-P96ZKMU (Brazing) (Brazing) Unit side CMB-WP1016NU-AA ø19.05 [3/4] ø28.58 [1-1/8] PURY-P120ZKMU (Brazing) (Brazing) *1. PURY-P-144ZKMU model or larger requires a connection of two main-HBC controllers in parallel.
Page 50 ø15.88 [5/8] ø19.05 [3/4] PQRY-P72T/Y/ZLMU (Brazing) (Brazing) Heat (HBC controller) ø19.05 [3/4] ø22.2 [7/8] source CMB-WP108NU-AA PQRY-P96T/Y/ZLMU (Brazing) (Brazing) unit side CMB-WP1016NU-AA ø19.05 [3/4] ø22.2 [7/8] PQRY-P120T/Y/ZLMU (Brazing) (Brazing) 6) Use of two HBC controllers (Unit: mm [in])
Page 51 [ II Restrictions ] (4) Refrigerant pipe between HBC controller and HBC controller Unit: mm [inch] ø15.88 [5/8"] (Brazed connection) 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...
Page 52: Hbc Controller Components
III HBC Controller Components [1] HBC Controller Components ................... 43 [2] Sub-HBC Controller Components..................46 [3] Control Box of the HBC Controller and Sub-HBC Controller ........... 48 [4] HBC Controller and Sub-HBC Controller Circuit Board ........... 49 [5] Maintenance Equipment ....................51 HWE2206A - 41 -...
Page 53 HWE2206A - 42 -...
Page 54: Hbc Controller Components
From Sub-HBC controller (Hot water) Drain From Sub-HBC controller (Cold water) Expansion Vessel Water inlet To Sub-HBC controller (Cold water) (2) CMB-WP108NU-AA To Sub-HBC controller (Hot water) From Main HBC High pressure pipe controller Low pressure pipe From Sub-HBC controller (Hot water)
Page 55 [ 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 56 [ III HBC Controller Components ] 4. Top side (1) CMB-WP1016NU-AA VB3f (2) CMB-WP108NU-AA VB3e HWE2206A - 45 -...
Page 57: Sub-Hbc Controller Components
[ III HBC Controller Components ] [2] Sub-HBC Controller Components 1. Front (1) CMB-WP1016NU-AB To Main_HBC controller (Hot water) From Main_HBC controller (Hot water) To Main_HBC controller (Cold water) From Main_HBC controller (Cold water) (2) CMB-WP108NU-AB To Main_HBC controller (Hot water) From Main_HBC controller (Hot water) To Main_HBC controller (Cold water) From Main_HBC controller (Cold water)
Page 58 [ III HBC Controller Components ] 2. Top side (1) CMB-WP1016NU-AB VB3f (2) CMB-WP108NU-AB VB3e HWE2206A - 47 -...
Page 59: Control Box Of The Hbc Controller And Sub-Hbc Controller
[ III HBC Controller Components ] [3] Control Box of the HBC Controller and Sub-HBC Controller 1. CMB-WP108, WP1016NU-AA, CMB-WP108, WP1016NU-AB Terminal block for transmission line Terminal block for power supply AC reactor (ACL) Power supply circuit board HBC controller board HWE2206A - 48 -...
Page 60: Hbc Controller And Sub-Hbc Controller Circuit Board
[ III HBC Controller Components ] [4] HBC Controller and Sub-HBC Controller Circuit Board 1. HBC controller and Sub-HBC controller circuit board HWE2206A - 49 -...
Page 61 [ III HBC Controller Components ] 2. Power supply circuit board HWE2206A - 50 -...
Page 62: Maintenance Equipment
[ III HBC Controller Components ] [5] Maintenance Equipment Maintenance cycle [Note that maintenance cycle does not mean guarantee period.] The following tables are applicable when using equipment under the conditions below. Normal use without frequent START/STOPs (The number of START/STOPs is assumed to be less than 6 times per hour in normal use.) Operating hours are assumed to be 10 hours per day/2500 hours per year.
Page 63 [ III HBC Controller Components ] HWE2206A - 52 -...
Page 64: Electrical Wiring Diagram
IV Electrical Wiring Diagram [1] Electrical Wiring Diagram of the HBC Controller and Sub-HBC Controller...... 55 [2] Electrical Wiring Diagram of Transmission Booster............63 HWE2206A - 53 -...
Page 65 HWE2206A - 54 -...
Page 66: Electrical Wiring Diagram Of The Hbc Controller And Sub-Hbc Controller
[ IV Electrical Wiring Diagram ] IV Electrical Wiring Diagram [1] Electrical Wiring Diagram of the HBC Controller and Sub-HBC Controller (1) CMB-WP108NU-AA HWE2206A - 55 -...
Page 67 [ IV Electrical Wiring Diagram ] (2) CMB-WP108NU-AA (Detail of X section) HWE2206A - 56 -...
Page 68 [ IV Electrical Wiring Diagram ] (3) CMB-WP1016NU-AA HWE2206A - 57 -...
Page 69 [ IV Electrical Wiring Diagram ] (4) CMB-WP1016NU-AA (Detail of X section) HWE2206A - 58 -...
Page 70 [ IV Electrical Wiring Diagram ] (5) CMB-WP108NU-AB HWE2206A - 59 -...
Page 71 [ IV Electrical Wiring Diagram ] (6) CMB-WP108NU-AB (Detail of X section) HWE2206A - 60 -...
Page 72 [ IV Electrical Wiring Diagram ] (7) CMB-WP1016NU-AB HWE2206A - 61 -...
Page 73 [ IV Electrical Wiring Diagram ] (8) CMB-WP1016NU-AB (Detail of X section) HWE2206A - 62 -...
Page 74: 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 208/230VAC Varistor Noise filter Black White White White White Varistor Green Black Stabilized power supply Blue Black...
Page 75 [ IV Electrical Wiring Diagram ] HWE2206A - 64 -...
Page 76: Refrigerant Circuit
V Refrigerant Circuit [1] Refrigerant Circuit Diagram ..................... 67 [2] Principal Parts and Functions ..................70 HWE2206A - 65 -...
Page 77 HWE2206A - 66 -...
Page 78: Refrigerant Circuit Diagram
[ V Refrigerant Circuit ] V Refrigerant Circuit [1] Refrigerant Circuit Diagram 1. HBC controller (1) CMB-WP108NU-AA HWE2206A - 67 -...
Page 79 [ V Refrigerant Circuit ] (2) CMB-WP1016NU-AA HWE2206A - 68 -...
Page 80 [ V Refrigerant Circuit ] 2. Sub-HBC controller (1) CMB-WP108NU-AB Sub-HBC controller water system Air purge valves VB3a T31a TH33 VB3b No.1 No.4 TH32 Port T31b VB3d purge T31d valves VB3e T31e VB3f No.5 No.8 Port T31f VB3h T31h To HBC controller (2) CMB-WP1016NU-AB Sub-HBC controller water system Air purge...
Page 81: 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 AC208-230V Continuity check valve ant side and defrost cycle Open when energized/ with a tester closed when de-energized 4-way...
Page 82 [ V Refrigerant Circuit ] 2. Sub-HBC controller Part name Symbols Notes Usage Specifications Check method Thermistor TH31a~p Water Indoor unit circulating water con- Same as the table above side trol TH32,33 Indoor unit circulating water con- trol Valve VB3a~p Water 1) Switches the water flow DC12V...
Page 83 [ V Refrigerant Circuit ] HWE2206A - 72 -...
Page 84: Control
VI Control [1] Functions and Factory Settings of the Dipswitches ............75 [2] Controlling HBC Controller....................76 HWE2206A - 73 -...
Page 85 HWE2206A - 74 -...
Page 86: 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 Model setting Preset before shipment SV1 ON fixed Any time after be- Not available Available control...
Page 87: Controlling Hbc Controller
[ VI Control ] [2] Controlling HBC Controller Water pump control -1- Water pump (pump1, 2) 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 88 [ 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 89 [ 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 or 900 and 1600 pulses.
Page 90 [ VI Control ] Bypass Control -5- Solenoid valve (SV1) Control Operation mode ON (open) OFF (close) Cooling-only Thermo-ON Always ON Cooling-main Thermo-ON Always OFF Heating-only Thermo-ON Always OFF Heating-main Thermo-ON Always OFF Defrost Always ON during heat recovery OFF except to perform heat recovery defrost (SW3-10: ON) defrost (SW3-10: OFF) Stop...
Page 91 [ 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 and heat recovery defrost.
Page 92 [ VI Control ] (3) Defrost cycle Heat recovery defrost Bypass defrost Outdoor Unit Dip switch setting SW3-10 OFF SW3-10 ON Operation mode Heating-only Heating-main Heating-only Heating-main Outdoor unit fre- quency Outdoor unit fan SV1a Refer to the outdoor unit service handbook. SV5b 21S4a, 21S4b HBC controller...
Page 93 [ 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 94 [ 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 95 [ VI Control ] Backup control -9- Backup control The following backup control is started on the HBC controller 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 96: Test Run Mode
VII Test Run Mode [1] Read before Test Run...................... 87 [2] Operating Characteristic and Refrigerant Amount ............88 [3] Evaluating and Adjusting Refrigerant Charge..............88 [4] Refrigerant Amount Adjust Mode..................90 [5] The following symptoms are normal................90 HWE2206A - 85 -...
Page 97 HWE2206A - 86 -...
Page 98: Read Before Test Run
[ VII Test Run Mode ] VII Test Run Mode [1] Read before 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 99: 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 100 [ VII Test Run Mode ] 3. Maximum refrigerant charge There is a limit to the amount of refrigerant that can be charged into a unit. Observe the maximum refrigerant charge in the table below. PURY-P72-168T/YNU-A Total index of the outdoor units P120 P144 P168...
Page 101: 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 102: Troubleshooting
VIII Troubleshooting [1] Error Code Lists ....................... 93 [2] Responding to Error Display on the Remote Controller........... 97 [3] Investigation of Transmission Wave Shape/Noise............141 [4] Troubleshooting Principal Parts ..................144 [5] Refrigerant Leak ......................175 [6] Servicing the HBC controller..................177 [7] Instructions for debris removal operation...............
Page 103 HWE2206A - 92 -...
Page 104: 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 105 [ 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 − −...
Page 106 [ 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 107 [ VIII Troubleshooting ] Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code Backup operation [115] ACCT sensor fault [116] DCCT sensor fault [117] ACCT sensor circuit fault 5301 4300 [118] DCCT sensor circuit fault [119] Open-circuited IPM/Loose ACCT connector [120]...
Page 108: 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 109 [ 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 110 [ VIII Troubleshooting ] 2501 1. Error Code 2501 Water pump (pump1, 2) 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.
Page 111 [ 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 112 [ 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 113 [ 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 114 [ 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 115 [ VIII Troubleshooting ] 4102 1. Error Code 4102 Open phase 2. Error definition and error detection method Refer to 4102 in outdoor unit service handbook. 4106 1. Error Code 4106 <Transmission power supply fault Error detail code FF (Outdoor unit)> 2.
Page 116 [ 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 controller) (TH31a~TH31p) 5177 5178 Temperature sensor fault (Sub-HBC controller) (TH32~TH33)
Page 117 [ VIII Troubleshooting ] 5201 1. Error Code 5201 High-pressure sensor fault (Outdoor unit 63HS1) 2. Error definition and error detection method Refer to 5201 in outdoor unit service handbook. 1. Error Code 5201 High-pressure sensor fault (HBC PS1) 5203 Intermediate pressure sensor fault (HBC PS3) 2.
Page 118 [ VIII Troubleshooting ] 1. Error Code 5301 DCCT sensor fault (Detail code 116) 2. Error definition and error detection method When the bus current less than 18 Apeak is detected at startup (6Hz) 3. Cause, check method and remedy Cause Check method and remedy Contact failure...
Page 119 [ VIII Troubleshooting ] 1. Error Code 5301 DCCT sensor circuit fault (Detail code 118) 2. Error definition and error detection method When an error value is detected with the DCCT detection circuit just before the inverter starts. 3. Cause, check method and remedy Cause Check method and remedy Contact failure...
Page 120 [ VIII Troubleshooting ] 1. Error Code 5301 Faulty ACCT wiring (Detail code 120) 2. Error definition and error detection method Presence of target current cannot be detected during the self-diagnostic operation immediately before startup. (Detection of improperly mounted ACCT sensor) 3.
Page 121 [ 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/CN518 disconnection or contact failure Check for disconnection of the connector (CN4F/CN518) on the indoor unit/ HBC controller control board.
Page 122 [ 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 123 [ 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 Detail code 001: Transmission Bus-Busy error in centralized control system Detail code 002: Transmission Bus-Busy error in indoor unit system The address/attribute appeared on the display on the remote controller indicates the controller where an error oc-...
Page 124 [ 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 125 [ 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 126 [ 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 127 [ 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 128 [ 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 129 [ 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 130 [ 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 131 [ 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 132 [ 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 133 [ 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 134 [ VIII Troubleshooting ] 7100 1. Error Code 7100 Total capacity error 2. Error source, cause, check method and remedy Refer to 7100 in outdoor unit service handbook. 7101 1. Error Code 7101 Capacity code setting error 2. Error source, cause, check method and remedy Refer to 7101 in outdoor unit service handbook.
Page 135 [ 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 136 [ VIII Troubleshooting ] Error source Cause Check method and remedy controller For the address of the HBC controller (Main 2 and Sub), is 50 added to Change the HBC Is there a HBC the smallest indoor unit address, controller controller (Sub)? which is connected to the (Main 2 and Sub) address.
Page 137 [ 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 138 [ VIII Troubleshooting ] 7113 1. Error Code 7113 Function setting error (incorrect resistor connection) 2. Error source, cause, check method and remedy Refer to 7113 in outdoor unit service handbook. 7117 1. Error Code 7117 Model setting error 2. Error source, cause, check method and remedy Refer to 7117 in outdoor unit service handbook.
Page 139 [ 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 140 [ 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 141 [ 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 142 [ 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. HWE2206A - 131 -...
Page 143 [ 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 144 [ 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 (208/230 VAC) is not on.
Page 145 [ VIII Troubleshooting ] In case of ME remote controller 3. Phenomena "HO" or "Waiting for ···" 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"...
Page 146 [ 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 147 [ 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 148 [ 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 149 [ 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 150 [ 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 144) troller due to HBC controller LEV1, 2, and 3 actuation failure.
Page 151 [ 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 152: 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 153 [ 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 154 [ 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 155: Troubleshooting Principal Parts
[ VIII Troubleshooting ] [4] Troubleshooting Principal Parts -1- LEV LEV operation HBC controller LEV1, 2, and 3 (linear expansion valves) are driven by the pulse signal from the control board and are con- trolled by a stepping motor. (1) HBC controller LEV The valve opening changes according to the number of pulses.
Page 156 [ 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 157 [ VIII Troubleshooting ] Pressure sensor -2- Pressure sensor Pressure Sensor Configuration (PS1, PS3) The pressure sensor consists of the circuit shown in the figure below. If DC 5V is applied between the red and the black wires, voltage corresponding to the pressure between the white and the black wires will be output, and the value of this voltage will be converted by the microcomputer.
Page 158 [ VIII Troubleshooting ] Troubleshooting Principal Parts of HBC Controller -3- Troubleshooting Principal Parts of HBC Controller 1. Pressure sensor Troubleshooting flow chart for pressure sensor START Check the connectors on pressure sensor PS1 or PS3 for proper connections. Repair the fault. Operating at the moment? Note 1 On the self-diagnosis monitor, measure...
Page 159 [ 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 CN512 or CN513 connector on the HBC controller control board for proper connections.
Page 160 [ 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 161 [ VIII Troubleshooting ] 3. Troubleshooting flow chart for LEV, Solenoid valve (SV1), and Valve block 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. Repair the fault.
Page 162 [ 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. Control board When LEV is fully closed : tick sound When LEV is fully open : no sound Check the above.
Page 163 [ VIII Troubleshooting ] Control Circuit -4- Control Circuit (1) Control power source function block 1) PURY-(E)P72YNU-A AC power source (YNU: 460 VAC) Control system (5-30 VDC) Noise filter board Inverter board Noise filter Smoothing capacitor Compressor Rectifier Inverter Fuse AC Power source Fuse Inverter...
Page 164 [ VIII Troubleshooting ] 2) PURY-(E)P96 - (E)P144, P168YNU-A AC power source (YNU: 460 VAC) Control system (5-30 VDC) Inverter board Noise filter board Noise filter Rectifier Smoothing capacitor Inverter Compressor AC Power source Fuse YNU: 460 VAC Fuse Power-supply Inverter terminal block drive circuit...
Page 165 [ VIII Troubleshooting ] 3) PURY-EP168YNU-A AC power source (YNU: 460 VAC) Control system (5-30 VDC) Inverter board Noise filter board Noise filter Rectifier Smoothing capacitor Inverter Compressor AC Power source Fuse YNU: 460 VAC Fuse 15 V power supply Converter Converter Power-supply...
Page 166 [ VIII Troubleshooting ] 4) PURY-(E)P72TNU-A AC power source (TNU: 208-230 VAC) Control system (5-30 VDC) Noise filter board Inverter board Capacitor board Noise filter Smoothing capacitor Compressor Rectifier Inverter AC Power source Fuse Inverter Fuse TNU: 208-230 VAC drive circuit Power-supply terminal block Surge protector...
Page 167 [ VIII Troubleshooting ] PURY-(E)P96 - (E)P144, P168TNU-A AC power source (TNU: 208-230 VAC) Control system (5-30 VDC) Inverter board Noise filter board Capacitor board Noise filter Rectifier Smoothing capacitor Inverter Compressor AC Power source TNU: 208-230 VAC Fuse Fuse Power-supply terminal Inverter block...
Page 168 [ VIII Troubleshooting ] 6) PURY-EP168TNU-A AC power source (TNU: 208-230 VAC) Control system (5-30 VDC) Inverter board Noise filter board Noise filter Rectifier Smoothing capacitor Inverter Compressor AC Power source TNU: 208-230 VAC Fuse 15 V power supply Converter Fuse Converter Power-supply terminal...
Page 169 [ VIII Troubleshooting ] 7) PURY-P72ZKMU-A Power source system (AC 230 / 575 V) Control system (DC 5 ~ 30 V) INV board Noise filter Noise filter Rectifier Smoothing capacitor Inverter Compressor AC 575V Terminal block for Inverter drive Fuse 15V Power supply power source circuit...
Page 170 [ VIII Troubleshooting ] 8) PURY-P96ZKMU-A Power source system (AC 230 / 575 V) Control system (DC 5 ~ 30 V) INV board Noise filter Noise filter Rectifier Smoothing capacitor Inverter Compressor AC 575V Terminal block for Inverter drive Fuse 15V Power supply power source circuit...
Page 171 [ VIII Troubleshooting ] 9) PURY-P120, P144ZKMU-A Power source system (AC 230 / 575 V) Control system (DC 5 ~ 30 V) Noise filter INV board Noise filter Rectifier Smoothing capacitor Compressor Inverter AC 575V Inverter drive Terminal block for Fuse 15V Power supply circuit...
Page 172 [ VIII Troubleshooting ] 10) PQRY-P72 - P168YLMU-A1 Power source system (AC 230 / 460 V) Control system (DC 5 ~ 30 V) INV board Noise filter Compressor Noise filter Rectifier Smoothing capacitor Inverter AC 460V Fuse Terminal block for Inverter drive 17V Power supply power source...
Page 173 [ VIII Troubleshooting ] 11) PQRY-P72 - P120TLMU-A1 Power source system (AC 208 / 230 V) Control system (DC 5 ~ 30 V) Noise filter INV board Compressor Noise filter Rectifier Smoothing capacitor Inverter AC 208 / 230 V Terminal block for Inverter drive Fuse 17V Power supply...
Page 174 [ VIII Troubleshooting ] 12) PQRY-P144, P168TLMU-A1 Power source system (AC 208 / 230 V) Control system (DC 5 ~ 30 V) Noise filter Compressor Smoothing capacitor Inverter Noise filter Rectifier AC 208 / 230 V INV board Inverter drive Fuse Terminal block for 15V Power supply...
Page 175 [ VIII Troubleshooting ] 13) PQRY-P72 - P168ZLMU-A1 Power source system (AC 230 / 575 V) Control system (DC 5 ~ 30 V) INV board Noise filter Compressor Noise filter Rectifier Smoothing capacitor Inverter AC 575V Fuse Terminal block for Inverter drive 15V Power supply power source...
Page 176 [ VIII Troubleshooting ] (2) Troubleshooting transmission power circuit of outdoor unit 1) PURY-(E)P72 - P144, P168YNU-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 177 [ VIII Troubleshooting ] Check for conductivity between TB11 and TB21 and between TB12 and TB22. Check TB11, TB12, TB21, TB22 on the noise Is there conductivity between them? filter for loose screws. Any loose Replace the noise filter screws? Check the wiring between the noise filter board and TB1 of power supply terminal block for proper connections.
Page 178 [ VIII Troubleshooting ] 2) PURY-EP168YNU-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 179 [ VIII Troubleshooting ] Check for conductivity between TB11 and TB21 and between TB12 and TB22. Check TB11, TB31, TB21, TB12, TB32, TB22 Is there conductivity between them? on the noise filter for loose screws. Any loose Replace the noise filter screws? Check the wiring between the noise filter board and TB1 of power supply terminal block for proper...
Page 180 [ VIII Troubleshooting ] 3) PURY-(E)P72 - (E)P168TNU-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 181 [ VIII Troubleshooting ] Check for conductivity between TB12 and pin 3 of CN12 and between TB11 and pin 1 of CN12. Check TB11-TB23 on the noise filter for loose Is there conductivity between them? screws. Any loose Replace the noise filter screws? Check the wiring between the noise filter board and TB1 of power supply terminal block for proper...
Page 182 [ VIII Troubleshooting ] 4) PQRY- P72 - P168YLMU-A1 Check the voltage at the indoor/heat source transmission terminal block (TB3) of heat source unit. Check whether the transmission line is disconnected, DC 24 ~ 30 V check for contact failure, and repair the problem. Check the voltage at TB3 after removing transmission line from TB3.
Page 183 [ VIII Troubleshooting ] 5) PQRY-P72, P96, P120TLMU-A1 Check the voltage at the indoor/heat source transmission terminal block (TB3) of heat source 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 184 [ VIII Troubleshooting ] 6) PQRY-P144, P168TLMU-A1 Check the voltage at the indoor/heat source transmission terminal block (TB3) of outdoor unit. Check whether the transmission line is disconnected, DC 24 ~ 30 V check for contact failure, and repair the problem. Check the voltage at TB3 after removing transmission line from TB3.
Page 185 [ VIII Troubleshooting ] 7) PURY-P72 - P144ZKMU-A, PQRY-P72 - P168ZLMU-A1 Check the voltage at the indoor/outdoor transmission terminal block (TB3) of outdoor unit. Check whether the transmission line is disconnected, DC 24 ~ 30 V check for contact failure, and repair the problem. Check the voltage at TB3 after removing transmission line from TB3.
Page 186: 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) Connect the service port on the high-pressure gas service valve (BV2) to that on the low-pressure gas service valve (BV1) using a charge hose.
Page 187 [ 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 188: 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 189 [ 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 (pump1, 2) 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 190: 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 191: 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 192: 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 193 [ VIII Troubleshooting ] Replacement procedures for each service part 1. Solenoid valve coil (SV1) Operation Operation procedures Illustrations location In ceiling (1) Remove the four fixing screws from the space service panel (right) and then remove the service panel (right). Service panel (top right) (2) Remove the two fixing screws from the...
Page 194 [ 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 195 [ VIII Troubleshooting ] 5. Valve block (VB3) 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 196 [ VIII Troubleshooting ] Operation Operation procedures Illustrations location (11) Remove the 8 fixing screws of the Below ceiling plates supporting the valve block shown Remove the fixing in the figure. screws of the valve block supporting plate (12) Remove the 8 screws securing the Remove the valve block fixing screws valve block and then replace the valve...
Page 197 [ VIII Troubleshooting ] 6. Solenoid valve (SV1) 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 (SV1) service panel (right) and then remove the service panel (right).
Page 198 (Applicable to CMB- WP108NU-AA only) (4) Slide the control box to the left until the strainer is visible (Approx. 150 mm). (Applicable to CMB-WP108NU-AA only) Strainer body Slide the control box. Control box (5) Using the supplied spanner plate, open Supplied spanner plate the cover at the bottom of the strainer.
Page 199 [ VIII Troubleshooting ] 8. Pump2 (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 the service panel (top left).
Page 200 [ VIII Troubleshooting ] 9. Pump1 (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 201 [ 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 202 [ 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 203 [ 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 204 [ 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 205 [ 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 206 [ VIII Troubleshooting ] 20. Water pressure protection valve Operation Operation procedures Illustrations location (1) Remove the two fixing screws from the In ceiling Service panel (top leftt) space service panel (top left) and then remove the service panel (top left). Service panel (left) (2) Remove the cover above the water pressure protection valve (...
Page 207 [ 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 Air purge valve (left) space service panel (right) and then remove Air purge valve (right) the service panel (right).
Page 208: Led Monitor Display On The Outdoor Unit Board
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Page 210: 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 211 [ 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 212 [ 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 213 [ IX LED Monitor Display on the Outdoor Unit Board ] -2- HBC controller/Sub-HBC controller 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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Mitsubishi Electric CMB-WP108NU-AA Service Handbook

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