Toshiba VN-U00151SY-E Service Manual
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Toshiba VN-U00151SY-E Service Manual

Toshiba VN-U00151SY-E Service Manual

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HEAT RECOVERY VENTILATION UNIT
SERVICE MANUAL
Concealed microcomputer control type
Model name:
VN-U00151SY-E
VN-U00251SY-E
VN-U00351SY-E
VN-U00501SY-E
VN-U00651SY-E
VN-U00801SY-E
VN-U01001SY-E
VN-U00151SY-C
VN-U00251SY-C
VN-U00351SY-C
VN-U00501SY-C
VN-U00651SY-C
VN-U00801SY-C
VN-U01001SY-C
FILE No. A10-2303
VN-U00151SY-TR
VN-U00251SY-TR
VN-U00351SY-TR
VN-U00501SY-TR
VN-U00651SY-TR
VN-U00801SY-TR
VN-U01001SY-TR
Mar., 2023, TBEX

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Summary of Contents for Toshiba VN-U00151SY-E

  • Page 1 FILE No. A10-2303 HEAT RECOVERY VENTILATION UNIT SERVICE MANUAL Concealed microcomputer control type Model name: VN-U00151SY-E VN-U00151SY-TR VN-U00251SY-E VN-U00251SY-TR VN-U00351SY-E VN-U00351SY-TR VN-U00501SY-E VN-U00501SY-TR VN-U00651SY-E VN-U00651SY-TR VN-U00801SY-E VN-U00801SY-TR VN-U01001SY-E VN-U01001SY-TR VN-U00151SY-C VN-U00251SY-C VN-U00351SY-C VN-U00501SY-C VN-U00651SY-C VN-U00801SY-C VN-U01001SY-C Mar., 2023, TBEX...

  • Page 2: Table Of Contents

    Original instruction Contents 1 Features ............11 2 Specifications .
  • Page 3 • The qualified installer is a person who installs, maintains, relocates and removes the Heat recovery ventilation unit made by Toshiba Carrier Corporation. He or she has been trained to install, maintain, relocate and remove the Heat recovery ventilation unit made by Toshiba Carrier Corporation or, alternatively, he or she has been instructed in such operations by an individual or individuals who have been trained and is thus thoroughly acquainted with the knowledge related to these operations.
  • Page 4 Definition of Protective Gear When the Heat recovery ventilation unit is to be transported, installed, maintained, repaired or removed, wear protective gloves and ‘safety’ work clothing. In addition to such normal protective gear, wear the protective gear described below when undertaking the special work detailed in the table below.
  • Page 5 Warning indications on the Heat recovery ventilation unit [Confirmation of warning label on the main unit] Confirm that labels are indicated on the specified positions. If removing the label during parts replace, stick it as the original. Warning indication Description WARNING WARNING ELECTRICAL SHOCK HAZARD...
  • Page 6 Precautions for safety The manufacturer shall not assume any liability for the damage caused by not observing the description of this manual. DANGER Before carrying out the installation, maintenance, repair or removal work, be sure to set the circuit breaker for Heat recovery ventilation unit to the OFF position.
  • Page 7 WARNING Before starting to repair the Heat recovery ventilation unit, read carefully through the Service Manual, and repair the Heat recovery ventilation unit by following its instructions. Only qualified service person (*1) is allowed to repair the Heat recovery ventilation unit. Repair of the Heat recovery ventilation unit by unqualified person may give rise to a fire, electric shocks, injury, water leaks and/or other problems.
  • Page 8 If, in the course of carrying out repairs, it becomes absolutely necessary to check out the electrical parts with the electrical control cover of one or more of the Heat recovery ventilation unit removed in order to find out exactly where the trouble lies, put a sign in place so that no-one will approach the work location before proceeding with the Do not bring a work.
  • Page 9 Relocation • Only a qualified installer (*1) or qualified service person (*1) is allowed to relocate the Heat recovery ventilation unit. It is dangerous for the Heat recovery ventilation unit to be relocated by an unqualified individual since a fire, electric shocks, injury, water leakage, noise and/or vibration may result.
  • Page 10 Declaration of Conformity Manufacturer: Toshiba Carrier Air Conditioning (China) Co., Ltd. Building 1, No.60, 21st Avenue and 2nd Floor, Building 3, No.235, 23st Avenue, Baiyang Street, Hangzhou Economic and Technological Development Area, China. TCF holder: TOSHIBA CARRIER EUROPE S.A.S Route de Thil...
  • Page 11 Declaration of Conformity Manufacturer: Toshiba Carrier Air Conditioning (China) Co., Ltd. Building 1, No.60, 21st Avenue and 2nd Floor, Building 3, No.235, 23st Avenue, Baiyang Street, Hangzhou Economic and Technological Development Area, China. TCF holder: TOSHIBA CARRIER UK LTD. Porsham Close Belliver Industrial Estate Roborough Plymouth Devon...

  • Page 12: Features

    Features  Main features The ventilation balance of air supplying and air exhausting can be changed. The filter inspection display function calculates the total Power saving ventilation running time and prompts you through the remote controller to inspect the filter. The cost of cooling and heating is reduced thanks to The cold mode function automatically makes the air the unit efficiently retrieving thermal energy (outdoor...

  • Page 13: Specifications

    Specifications  Concealed microcomputer control type VN-U0***1SY-E/-TR Model Name Item Fan Speed Power Supply 220-240 V, 50 Hz / 208-230 V, 60 Hz Extra high Heat High Exchange Medium Mode Power consumption Extra high High Bypass Mode Medium Extra high 0.61 0.77 1.17...
  • Page 14 VN-U0***1SY-E/-TR Model Name Item Fan Speed Extra high 77.0 75.0 74.0 74.0 70.0 72.5 70.5 High 80.0 76.0 75.0 74.5 72.0 74.5 71.0 average Medium 81.0 78.5 79.5 76.0 74.5 80.5 76.0 81.5 80.5 83.5 77.0 76.0 88.5 84.0 Extra high 83.0 80.0 81.0...
  • Page 15 VN-U0***1SY-C Model Name Item Fan Speed Power Supply 220 V~, 50 Hz Extra high Heat High Exchange Medium Mode Power consumption Extra high High Bypass Mode Medium Extra high 0.64 0.80 1.22 1.38 2.26 2.37 3.63 Heat High 0.50 0.63 0.78 0.88 1.39...
  • Page 16 VN-U0***1SY-C Model Name Item Fan Speed Extra high 77.0 75.0 74.0 74.0 70.0 72.5 70.5 High 80.0 76.0 75.0 74.5 72.0 74.5 71.0 average Medium 81.0 78.5 79.5 76.0 74.5 80.5 76.0 81.5 80.5 83.5 77.0 76.0 88.5 84.0 Extra high 83.0 80.0 81.0...

  • Page 17: Construction Views

    Construction views VN-U00151SY* Unit: mm Heat exchange element (Exhaust (Return Air) Air) Indoor Outdoor side side (Outdoor (Supply Air) Air) 158.2 98.7 98.7 Filter (Two for each element) 23.2 301.5 Fixing bracket Inspection cover VN-U00251SY* Unit: mm Heat exchange element (Exhaust (Return Air)
  • Page 18 VN-U00351SY* Unit: mm Heat exchange element (Two) (Exhaust (Return Air) Air) Outdoor Indoor side side (Supply (Outdoor Air) Air) 152.5 109.2 109.2 Filter (Two for each element) 35.2 330.5 Inspection cover Fixing bracket VN-U00501SY*, U00651SY* Unit: mm Heat exchangeelement (Two) (Return (Exhaust Air)
  • Page 19 VN-U00801SY*, U01001SY* Unit: mm 1068 Heat exchangeelement (Two) (Exhaust Air) (Return Air) Outdoor Indoor side side (Supply Air) (Outdoor Air) 134.2 1130 134.2 Filter (Two for each element) 82.5 Inspection cover Fixing bracket...

  • Page 20: Wiring Diagrams

    Wiring diagrams DAM(RA) DAM(OA) CN760 CN761 (WHT) (BLK) CN104 BLU BLU F301 t° (YEL) 3.15A TB02 100 V〜 (U3) (U4) CN105 SW301 t° (RED) Wiring for CN40 Central F401 (BLU) Control 3.15A CN106 SW701 t° 100 V〜 (WHT) CN107 CN41 (WHT) SW702 (BLU)

  • Page 21: Parts Rating

    Parts rating VN-U0***1SY-E / -TR / -C Fan motor ICF-340-60-3(R) ICF-340-150-6(R) ICF-340-250-4(R) for supply air DC340 V, 60 W DC340 V, 150 W DC340 V, 250 W Fan motor ICF-340-60-4(R) ICF-340-150-7(R) ICF-340-250-5(R) for exhaust air DC340 V, 60 W DC340 V, 150 W DC340 V, 250 W Damper motor (RA) 24BYJ48A, 12 VDC...

  • Page 22: Control Outline

    Control outline Control specifications Item Specification outline Remarks When the power 1. If the power supply is reset during the occurrence of a trouble, the check code is is reset cleared. If an abnormal state continues even after the unit is restarted by pressing the [ON/ OFF] button on the remote controller, the check code is redisplayed on the remote controller.
  • Page 23 Item Specification outline Remarks Ventilation Automatic ventilation mode control in the Heat recovery mode control ventilation unit system (continued) Heat Exchange Cooling zone Bypass Fan zone Heat Exchange Bypass Undefined Heating zone zone Undefined Heat Exchange zone RA: Return Air (°C) Start operation Ventilation mode Automatic...
  • Page 24 Item Specification outline Remarks Ventilation 2. Heat recovery ventilation unit system linked with air conditioners mode control 1) Automatic ventilation mode control in the air-conditioning linkage (continued) • Determine the mode from the operation mode of the air conditioner. [Cooling zone]: The air conditioner operation mode is Automatic cooling, Cooling, or Drying mode.
  • Page 25 Item Specification outline Remarks Ventilation Heating zone mode control (continued) Maximum set Bypass temperature Undefined zone Heat Exchange RA: Return Air (°C) Start operation Automatic ventilation determination in air conditioning linkage Cooling or Drying mode Cooling zone Heating zone RA, OA RA, OA detection detection...
  • Page 26 Item Specification outline Remarks 24-hour 1. 24-hour ventilation operation and setting CODE No. (DN) ventilation • By operating the [ON/OFF] buttons during operation of Heat recovery ventilation [47][31][49] control units, they stop operation and the system moves to 24-hour ventilation Low. The ventilation mode is fixed to Heat Exchange.
  • Page 27 Item Specification outline Remarks Nighttime heat This function is valid only for the Heat recovery ventilation unit system linked with air CODE No. (DN) purge control conditioners (invalid for the Heat recovery ventilation unit system only). [4C][747] 1. If the [ON/OFF] button is pressed during operation, the Heat recovery ventilation units and the air conditioners stop, and the system enters the nighttime heat purge mode (standby mode).
  • Page 28 Item Specification outline Remarks Nighttime heat Nighttime heat purge control purge control (continued) Cooling zone Bypass Heat Exchange Minimum set Undefined temperature zone RA: Return Air (°C) Heat recovery ventilation units and air conditioners are stopped. 24-hour ventilation setting invalid Start 24-hour ventilation Heat recovery ventilation unit system linked with air conditioners...
  • Page 29 Item Specification outline Remarks Cold mode 1. Even in Bypass mode control, the system automatically enters Heat Exchange CODE No. (DN) control mode to prevent condensation if OA ≤ RA/10°C + 12.5°C. [4D] • The display on the remote controller remains “Bypass mode” regardless of the ventilation mode in actual operation.
  • Page 30 Item Specification outline Remarks Cold mode Operating control (continued) OA ≤ RA/10°C + 12.5°C Heat Exchange Present ventilation mode continues Zone A? Zone B? Zone C DN [4D] Exhausting fan runs: 0000 Heat Exchange Heat Exchange Supplying fan Heat Exchange Supplying fan Heat Exchange Supplying fan mode continues stops (OFF for 10 minutes and...
  • Page 31 Item Specification outline Remarks Operation 1. Operation output setting CODE No. (DN) output • The output setting can be changed by CODE No. (DN) [ED] [ED] (Connecting an 0000: Contact is on only during normal operation. auxiliary fan) * Contact is off during 24-hour ventilation or nighttime heat purge operation. •...
  • Page 32 Item Specification outline Remarks Start/Stop input Connect the Remote ON/OFF adapter to the connectors CN706 (2P) or CN705 (5P) CODE No. (DN) (Linked on the control circuit board of the Heat recovery ventilation unit. [4E] operation with The Remote ON/OFF adapter is sold separately. external •...
  • Page 33 Item Specification outline Remarks Cold air detection When the cold air is detected with TOA sensor, digital output is ON. TOA sensor output Temp. out air (Cold air detection) <Control outline> sensor 1. ON conditions for output Output is ON if all following conditions are satisfied. CODE No.
  • Page 34 Item Specification outline Remarks Cold air detection <How to install > output • Prepare the following parts to use this control. (Cold air detection) Name Q’ty Work item (continued) TCB-KBCN610V-E Wire (A) (Connection from CN610 to relay) Relay (DC12 V) Local procurement Local procurement Wire (B)

  • Page 35: Applied Control And Functions (Including Circuit Configuration)

    Applied control and functions (Including circuit configuration) 7-1. Block diagram Wird header remote controller Display LCD Real Time Clock EEPROM Key switch Temp. Sensor Buzzer Wireless Module Depends on models DC3.3 V Power Circuit Remote controller communication circuit T2UC Link: Up to 16 units can be connected TCC Link: Up to 8 units can be connected Heat recovery ventilation unit #8 ~ #16...
  • Page 36 7-2. Indoor printed circuit board MCC-1784...
  • Page 37 MCC-1778...
  • Page 38 7-3. Specifications of optional connectors on the Heat recovery ventilation unit board External input / output function List • Depending on the model, some DN codes may not be displayed on the remote controller. Also, the number of data that can be set may differ. •...
  • Page 39 Color Color* Adapter Connector (Con- (Lead Function Note (sold separately) Code Data nector) wire) Normal OPEN (Albeit contact) 0003 Fire alarm input (Factory default) 0005 Fire alarm input Normal CLOSE (Break contact) CN73 TCB- 0006 Notice code input Display code 202 (Demand KBCN73DEE control input)
  • Page 40 Color Color* Adapter Connector (Con- (Lead Function Note (sold separately) Code Data nector) wire) DC12 V (COM) Common for Pin. 2, 5 Input signal makes switching of permission / prohibition of individual remote controller Prohibition of operation (During prohibition, remote controller “Central controlling mark”...
  • Page 41 7-4. Configuring the function settings of the Heat recovery ventilation unit (When configuring the settings, use the wired remote controller.) <Procedure> Stop running the unit before configuring the settings. Push [ Menu] to open the “Menu” Push and hold [ Menu] and [ ] at the same time to open “Field setting menu”...
  • Page 42 Push [ ] to black highlight the code (DN), and then push [ ] and [ ] to set the code Push [ ] to black highlight the data, and then push ] and [ ] to set the data After finishing setting the data of the code (DN), push Set/Fix] ...
  • Page 43 Codes (DN codes) for changing settings (Necessary for local advanced control) The following DN codes are used in common for RBC-AW(M)SU5*. * In the case of RBC-ASCU1* and RBC-AMTU3*, the display position is different, but it can be set in the same way. (in case of system linked with air conditioners) Code Description...
  • Page 44 Code Description SET DATA and description Factory default Note Unbalanced 0000: Normal 0000: Normal Setting change is ventilation fan necessary for all the Heat 0001: SA (High) > EA (Medium) or speed recovery ventilation unit in SA (Medium) > EA (Low) the group.
  • Page 45 Code Description SET DATA and description Factory default Note Max fan speed 0000: High 0001: Extra High Setting change is selection necessary for all the Heat 0001: Extra High recovery ventilation unit in the group. Cold air detection Output is ON if Cold air temp. becomes 0000: Control Cold air detection output is Output ON temp...
  • Page 46 Code Description SET DATA and description Factory default Note Changing the 0000: ON during normal operation 0000: ON during Setting change is operation output normal necessary for a Heat 0001: ON during normal operation, 24- operation recovery ventilation unit hour ventilation, or nighttime heat which transfers the purge operation operation output.
  • Page 47 Code Description SET DATA and description Factory default Note “High” fan speed • If you want to use “High setting”, it must As shown in the • These setting are for power setting of be set to “DN code [5D] = 0000” table on the left “Constant input power supply air (SA)
  • Page 48 Code Description SET DATA and description Factory default Note “Low” fan speed • Percentages below is for “Extra-High As shown in the • These setting are for power setting of (100%)” table on the left “Constant input power supply air (SA) control”.
  • Page 49 Code Description SET DATA and description Factory default Note “Low” fan speed air • Percentages below is for “Extra-High As shown in the • These setting are for volume setting of (100%)” table on the left “Constant air volume supply air (SA) control”.
  • Page 50  Remote controller switch monitoring function This function is available to call the service monitor mode from the remote controller during a test run to acquire temperatures of sensors of indoor unit (Heat recovery ventilation unit). Push [ Menu] to open the “Menu” Push and hold [ Menu] and [ ] at the same time to...
  • Page 51 Heat recovery ventilation unit and (SMMS series) Air-conditioning system Heat recovery ventilation unit only System Central control Address Linked with air-conditioner (Not linked with air-conditioner) Outdoor Outdoor unit unit Uv (U1 U2) Uv (U1 U2) Uv (U1 U2) Uv (U1 U2) Uv (U1 U2) Uv (U1 U2) Indoor...
  • Page 52 Heat recovery ventilation unit and (DI, SDI series) Air-conditioning system Heat recovery ventilation unit only System Central control Address Linked with air-conditioner (Not linked with air-conditioner) Outdoor Outdoor unit unit 1 2 3 1 2 3 1 2 3 1 2 3 Indoor Indoor Heat recovery...

  • Page 53: Troubleshooting

    Troubleshooting 8-1. Troubleshooting method 8-1-1. Troubleshooting Symptom Cause • Is the circuit breaker turned off? • Has a power failure occurred? Operation does not start after pressing • Does the “ ” display? the button. (The ventilation delay setting is set to CODE No. [4B] “ON” and it is not malfunction.
  • Page 54 8-2. Check codes The remote controller (local remote controller or central control) is equipped with an LCD that displays the operation status. If a trouble has occurred, see the following table to check the trouble of the Heat recovery ventilation unit using the failure diagnosis function.
  • Page 55 (Central control device) Check code Typical cause of trouble Description Central controller Central control communication No central control signal can be sent. (transmission) trouble Central control communication No central control signal can be received. (reception) trouble Follower unit trouble Trouble occurred on the follower unit in the group. (“***” is displayed on the local remote controller) NOTE Even if the same trouble (e.g.
  • Page 56 8-3. Troubleshooting based on information displayed on remote controller  Confirmation and check  Confirmation of trouble history Check code When a trouble occurred on the Heat recovery Unit number ventilation unit, the trouble history can be confirmed with the following procedure. (The trouble history is stored in memory up to 10 troubles.) Push [ Menu] to open the “Menu”...
  • Page 57 8-4. Diagnostic procedure for each check code Check code Location Check code Trouble detection System status Items to check (locations) Remote name conditions detection controller Remote Indoor–remote Stop of Communication between • Check remote controller inter-unit tie cable controller controller corresponding indoor P.C.
  • Page 58 Check code Location Check code Trouble detection System status Items to check (locations) Remote name conditions detection controller Indoor Other indoor Stop of Indoor P.C. board is not • Check for failure in indoor P.C. board trouble corresponding operating normally. (faulty EEPROM).
  • Page 59 Troubles detected by central control device Check code Location Check code Trouble detection System status Items to check (locations) Remote name conditions detection controller Central Central control Continued Central device is unable • Check for failures in the central control control device operation...
  • Page 67 8-5. Sensor characteristics Heat recovery ventilation unit ▼Temperature sensor characteristics Characteristic 1 Characteristic 2 Return air temperature Outdoor air temperature sensor (TRA, TSA) sensor (TOA) Resistance Resistance (kΩ) (kΩ) (10°C or (10°C or less) more) -1 0 Temperature (°C) Temperature (°C)

  • Page 68: Detachments

    Detachments  Assembling and exchanging the fan components Components CAUTION WARNING Be sure to put on gloves during working time; Be sure to stop operation of the Heat recovery ventilation otherwise an injury will be caused by a part etc. unit before work and then turn off switch of the breaker.
  • Page 69 Part name Procedure Remarks Electrical control cover Detachment Screws (B) Screws (A) (COVER, E-PARTS) 1. Remove the screws (B) (M4 × 6), and remove the electrical control cover (COVER, E-PARTS). 2. Loosen the screws (A) (M4 × 6) and slide electrical cover.
  • Page 70 Part name Procedure Remarks P.C. board 1 Detachment (PC BOARD ASSY, 1. Remove the connector from P.C. board 1 MCC-1784) (PC BOARD ASSY, MCC-1784). 2. Remove the screws (M4 × 8) that fix the earth wire. Return air damper Damper motor Outdoor air damper CN760 white 6P TOA sensor...
  • Page 71 Part name Procedure Remarks P.C. board 2 Detachment (PC BOARD ASSY, 1. Remove the connector from P.C. board 2 MCC-1778) (PC BOARD ASSY, MCC-1778). P.C. board 1 P.C. board 1 (CN520 blue 5P) (CN10 red 2P) CN570 blue 5P CN150 red 2P P.C.
  • Page 72 Part name Procedure Remarks Electrical box side Detachment Screws (BOX, EP, SIDE) 1. Remove 3 screws. Electrical box under (BOX, EP, DOWN) (12) Electrical box side Element rail upper Detachment Element rail left (RAIL, UP) 1. Remove the screw (M4 × 12) holding each Element rail upper Element rail left element rail (RAIL).
  • Page 73 Part name Procedure Remarks TSA sensor Detachment CLAMP (SENSOR ASSY, TSA) sensor 1. Remove the foam cover on the SA side. (Refer to how to remove the foam cover (14) 2.) 2. Remove CN104 (TSA sensor) from P.C. board 1. (15) Fan unit Detachment...
  • Page 74 Part name Procedure Remarks Outdoor air damper Detachment Outdoor air (DAMPER ASSY, RA) damper 1. Remove the 2 element rail upper and left (RAIL, UP) and the firing cover on the EA side. 2. Disconnect each connector on P.C. board 1. CN761 black 6P: Damper motor Push...

  • Page 75: C. Board Exchange Procedures

    P.C. board exchange procedures 10-1.P.C. board for indoor unit servicing 10-1-1. Remove FAN-IPDU P.C. board 1. Stop power supply to Heat recovery ventilation unit. 2. Disconnect the following cables in Fig.1 from terminal blocks and screws: power supply cable (a), remote control cable (b), and central control cable (c).
  • Page 76 8. Remove screws (a) in Fig.3. 9. Unlock spacers (b) in Fig.3, and remove the FAN-IPDU P.C. board. Refer to Fig.4 for way of unlocking spacer. The spacer is unlocked by pressing (b) Spacer (a) Screw in the direction of the arrow. P.C.
  • Page 77 10-1-2. Mount P.C. board 1. Make sure that heat sink is clean of dirt or scratches. 2. Apply heat dissipation grease evenly to area shown in Fig.5 of substitute P.C. board. This area is contact surface of IPM (IC701, IC750) with the heat sink, and make sure that no impurities such as dust adhere to this area while applying.
  • Page 78 10-2.Replacement of P.C. board for Heat recovery ventilation unit servicing Models VN-U0***1SY-E/-TR NOTE When replacing the P.C. board for indoor unit servicing The nonvolatile memory (hereafter called EEPROM, IC503) on the Heat recovery ventilation unit P.C. board before replacement includes the model specific type information and capacity codes as the factory-set value and the important setting data which have been automatically or manually set when the Heat recovery ventilation unit is installed, such as system / indoor unit / group addresses, setting, etc.
  • Page 79 10-2-1. Setting data read out from EEPROM The setting data modified on the site, other than factory-set value, stored in the EEPROM shall be read out. (1)Field setting menu Press [ Menu] to open the “Menu” Press and hold [ Menu] and [ ] at the same time to open “Field setting menu”...
  • Page 80 (2)DN data reading In the “Field setting menu” screen, press [ ] and ] to select “DN setting”, and then press [ Set/ Fix] Press [ ] and [ ] to select “Indoor unit” or “Outdoor unit”, and the press [ Set/Fix] ...
  • Page 81 If you need to change the address manually from the remote control, push [ Set/Fix]  The screen for settings appears. * The priority of the DIP switch and the remote controller setting is the latter. Push [ ] and [ ] to move the black highlight, and then push [ ] and [...
  • Page 82 10-2-2. P.C. board for Heat recovery ventilation unit servicing replacement procedures Replace the P.C. board to the one for Heat recovery ventilation unit servicing. At this time, perform the same setting of the switch (SW301, SW701, SW702, SW703), short-circuit connector CN34 as the setting of the P.C. board before replacement. CN34 (Red) If the plug for short-circuit is attached on the P.C.
  • Page 83 (Case 2) (Case 1) Indoor unit or Indoor unit or Heat recovery ventilation unit Heat recovery ventilation unit Service P.C. board of the unit Service P.C. board of the P.C. board P.C. board to be changed. unit to be changed. Remove the group wire of the terminal blocks A and B of the changed Heat...
  • Page 84 Push [ ] to black highlight the code (DN), and then push [ ] and [ ] to set the code Push [ ] to black highlight the data, and then push ] and [ ] to set the data After finishing setting the data of the code (DN), push Set/Fix] ...
  • Page 85 Table 1. Setting data (CODE No. table (example)) Item Setting data Factory-set value Lighting-up hours of the Filter Sign 0002: 2500H Dirty state of filter 0000: Standard Central control address 0099: Unfixed 0050: Heat recovery ventilation unit Type code (Ceiling-embedded duct) Capacity code Depending on the capacity Indoor unit address...
  • Page 86 Table 2. Model: CODE No.10 Setting data Type Type name abb. Heat recovery ventilation unit 0050* VN-U0***1SY-E/-TR/-C series (Celling-embedded) * EEPROM initial value on the P.C. board for indoor unit servicing. Table 3. Capacity: CODE No.11 Setup data Model Setup data Model Setup data Model...
  • Page 87 Table 6. Heat recovery ventilation unit address switch (●: ON, ‒: OFF) Address switch number Address switch number Address switch number Address switch number 1 — — — — — — — 33 — — — — — —  65  — — — — — — 97 ...

  • Page 88: Exploded Views And Parts List

    Exploded views and parts list VN-U00151SY-E(-TR)(-C), U00251SY-E(-TR)(-C), U00351SY-E(-TR)(-C), U00501SY-E(-TR)(-C), U0651SY-E(-TR)(-C), U00801SY-E(-TR)(-C), U01001SY-E(-TR)(-C)
  • Page 89 Q'ty/Set VN-U Ref No. Part No. Description 00151SY 00251SY 00351SY 00501SY 00651SY 00801SY 01001SY -E(-TR) -E(-TR) -E(-TR) -E(-TR) -E(-TR) -E(-TR) -E(-TR) 43H22030 BASE, MOTOR 43H22031 BASE, MOTOR 43H22032 BASE, MOTOR 43H22033 BELL MOUTH 43H22034 BELL MOUTH 43H22035 BELL MOUTH 43H22036 DAMPER ASSY, RA 43H22037 DAMPER ASSY, RA...
  • Page 90 Q'ty/Set VN-U Ref No. Part No. Description 00151SY 00251SY 00351SY 00501SY 00651SY 00801SY 01001SY -E(-TR) -E(-TR) -E(-TR) -E(-TR) -E(-TR) -E(-TR) -E(-TR) 43H21038 MOTOR ASSY, SUPPLY 43H21039 MOTOR ASSY, SUPPLY 43H21040 MOTOR ASSY, SUPPLY 43H21041 MOTOR ASSY, EXHAST 43H21042 MOTOR ASSY, EXHAST 43H21043 MOTOR ASSY, EXHAST 43H50042...
  • Page 91 Q'ty/Set VN-U Ref No. Part No. Description 00151SY 00251SY 00351SY 00501SY 00651SY 00801SY 01001SY 43H22030 BASE, MOTOR 43H22031 BASE, MOTOR 43H22032 BASE, MOTOR 43H22033 BELL MOUTH 43H22034 BELL MOUTH 43H22035 BELL MOUTH 43H22036 DAMPER ASSY, RA 43H22037 DAMPER ASSY, RA 43H22038 DAMPER ASSY, RA 43H22039...
  • Page 92 Q'ty/Set VN-U Ref No. Part No. Description 00151SY 00251SY 00351SY 00501SY 00651SY 00801SY 01001SY 43H21038 MOTOR ASSY, SUPPLY 43H21039 MOTOR ASSY, SUPPLY 43H21040 MOTOR ASSY, SUPPLY 43H21041 MOTOR ASSY, EXHAST 43H21042 MOTOR ASSY, EXHAST 43H21043 MOTOR ASSY, EXHAST 43H50042 SENSOR ASSY, TSA 43H50043 SENSOR ASSY, TSA 43H19036...
  • Page 93 Electric parts Q'ty/Set VN-U Ref No. Part No. Description 00151 00251 00351 00501 00651 00801 01001 SY-E SY-E SY-E SY-E SY-E SY-E SY-E (-TR)(-C) (-TR)(-C) (-TR)(-C) (-TR)(-C) (-TR)(-C) (-TR)(-C) (-TR)(-C) 43H58023 REACTOR 43H58005 REACTOR 43H58024 REACTOR 43H69100 PC BOARD ASSY, MCC-1784 43H69101 PC BOARD ASSY, MCC-1778 43H60007...

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