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Hitachi UTOPIA HRNE Series Service Manual

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UTOPIA H(V)RNE/HN(V)E

SERIES

Service Manual

Outdoor Units: 2 ~ 12 HP

Indoor Units Type:

• 4-Way Cassette

• 2-Way Cassette

• Ceiling

• In-the-Ceiling

• Wall

• Floor

• Floor Concealed

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Summary of Contents for Hitachi UTOPIA HRNE Series

Page 1 UTOPIA H(V)RNE/HN(V)E SERIES Service Manual Outdoor Units: 2 ~ 12 HP Indoor Units Type: • 4-Way Cassette • 2-Way Cassette • Ceiling • In-the-Ceiling • Wall • Floor • Floor Concealed...
Page 3 HITACHI may bring the latest innovations to their customers Whilst every effort is made to ensure that all dimensions and specifications are correct, any printers' errors not rectified are outside the control of HITACHI, who cannot be held responsible for same...
Page 5 CONTENTS 0 CONTENTS UNITS INSTALLATION________________ 1 AVAILABLE OPTIONAL FUNCTIONS __ 6/1 1.1. Transportation of Outdoor Unit _________ 1/3 6.1. Indoor Unit (Except RPK) _____________ 6/2 1.2. RCI_______________________________ 1/4 6.2. Indoor Unit (RPK only) _______________ 6/8 1.3. RCIM-FSN _________________________ 1/8 6.3. Outdoor Units RAS-2.5~5HN(V)E______ 6/12 1.4.
Page 6 CONTENTS FIELD WORK INSTRUCTION_________ 12/1 12.1. Guideline for selecting the drain pipe for the Indoor Unit __________________ 12/2 12.2. Caution with the refrigerant leakage ____ 12/2 12.3. Maintenance work __________________ 12/3 12.4. Service and maintenance record _______ 12/4 12.5. Service and maintenance record by means of the 7-segment display _______ 12/5...
Page 7 CONTENTS Code List Units NOTE: Please check, according to the model name, which is your air conditioner type and how it is MODELS CODIFICATION abbreviated and referred to in this technical catalogue. INDOOR UNITS FSN(1)(E/M) – System Free 4-Way-Cassette 4-Way-Cassette Mini 2-Way-Cassette Ceiling In-The-Ceiling...
Page 8 CONTENTS OUTDOOR UNITS H(V)RNE – Utopia DC-Inverter Single Phase Three Phases Unit Code Unit Code Unit Code RAS-2HVRNE 7E878648 RAS-2.5HVRNE 7E878649 RAS-3HVRNE 7E878651 RAS-4HVRNE 7E878652 RAS-4HRNE 7E878657 RAS-5HVRNE 7E878653 RAS-5HRNE 7E878658 RAS-6HRNE 7E878659 RAS-8HRNE 7E878663 RAS-10HRNE 7E878664 RAS-12HRNE 7E878665 OUTDOOR UNITS HN(V)E – Utopia N Single Phase Three Phases Unit...
Page 9 CONTENTS CODE LIST ACCESSORIES Accessory Name Code Figure PC-P1HE Remote Control Switch 7E799954 PSC-5S Central Station 60291050 PSC-5T 7 Day Timer 60291052 PC-P5H Optional Remote Controller 60290879 PC-LH3A Wireless Control Switch 60291056...
Page 10 CONTENTS Accessory Name Code Figure PC-RLH8 Receiver kit 60291106 for RCI-FSN1E on the panel PC-RLH9 Receiver Kit 60291107 for RCD-FSN on the panel PC-RLH11 Receiver Kit 60291109 for RCI, RCD, RPC, RPI, RPK and RPF(I) on the wall PC-RLH13 Receiver Kit for RCIM-FSN on the panel (Figure not available) PSC-5HR...
Page 11 CONTENTS Accessory Name Code Figure CS-NET CS-Net + Interface 6E191922 (HARC-40E) DBS-26 Drain Discharging Boss 60299192 P-G23WA2 Air Panel 60290534 for RCI P-N23WAM Air Panel 60197160 for RCIM P-G23DWA1 Air Panel 60299570 for RCD P-G46DWA1 Air Panel 60299571 for RCD B-23H4 Adapter for deodorant filter 60199790...
Page 12 CONTENTS Accessory Name Code Figure TKCI-232 T duct connecting kit 60199801 TE-03N Branch Pipe 70800007 TE-04N Branch Pipe 70800008 TE-56N Branch Pipe 70800009 TE-08N Branch Pipe 70800003 TE-10N Branch Pipe 70800004 TRE-06N Distributor 70800005 TRE-810N Distributor 70800010 QE-810N Distributor 70800006...
Page 13 UNITS INSTALLATION 1 UNITS INSTALLATION This chapter provides information about the procedures you must follow to install the H(V)RNE /H(V)NE outdoor units and the complete range of Hitachi indoor units. CONTENTS UNITS INSTALLATION _____________________________________________________ 1 1.1. Transportation of Outdoor Unit ________________________________________________ 3 1.2.
Page 14 UNITS INSTALLATION Ó WARNING: – Mount suspension bolts using M10 (W3/8) as size, as – Check to ensure that the accessories are packed with shown below: the indoor unit. – Do not install the indoor units outdoors. If installed outdoors, an electric hazard or electric leakage will occur.
Page 15 UNITS INSTALLATION 1.1. TRANSPORTATION OF OUTDOOR UNIT Transport the product as close to installation location as For installation (8~12 HP) practical before unpacking. – Remove the wooden base. – Apply two (2) ropes on the splints or corrugated Ò paper to protect the unit, and hang the unit as shown CAUTION: below.
Page 16 UNITS INSTALLATION 2. Before installation Before installation work, check the availability of the following parts that are packed inside the outdoor unit: RAS-8~12 HP 8HRNE 10HRNE 12HRNE Accessory Q'ty Compressed Sheet Pipe Flange of Refrigerant Gas Piping For Connection Hole of Operation Wiring Rubber Bush For Connection Hole of Power Source Wiring Screw...
Page 17 UNITS INSTALLATION – Check space between ceiling and false ceiling is enough – Consider piping connection side before lift indoor unit. as indicated below. – Lift the indoor unit by hoist, and do not put any force on – Check the ceiling surface is flat for the air panel the drain pain.
Page 18 UNITS INSTALLATION Removing the air intake grille from the air Ceiling not completed with panels yet. panel 1. Open the air intake grille to an angle of approximately Pattern Paper for Installation 45° from the surface of the air panel as shown below. Dimension for Opening Dimension for Opening Take up the grille keeping it inclined...
Page 19 UNITS INSTALLATION 7. Check to ensure that there is no gap around the – When the panel is installed, you can adjust the indoor contacting surface between the indoor unit and the unit height by using the wrench from the corner air panel.
Page 20 UNITS INSTALLATION Wiring connection for the air panel Ò CAUTION: 2. Connect the connectors as shown below (view of the Before connecting connectors, firstly turn OFF power electrical box) source. If the connectors are connected without turning OFF the power source, the auto-swing louver cannot function.
Page 21 UNITS INSTALLATION Suspension Bolts (Field-Supplied) – Check space between ceiling and false ceiling is enough Nut (Field-Supplied) as indicated below. Washer with Insulation (Accessory) – Check the ceiling surface is flat for the air panel Suspension Bracket Approx. 50 installation work. (Attached Indoor Unit) Washer (Accessory) Nut (Field-Supplied)
Page 22 UNITS INSTALLATION Ceiling not completed with panels yet. Removing Cover for Corner Pocekt (Positions) 1. Remove the screw at mark “a”. – Tighten the nuts of the suspension brackets after the adjustment is completed. Apply LOCK-TIGHT paint to the bolts and nuts in order to prevent them from loosening. If not done, abnormal noises or sounds may occur and the indoor unit may come loose.
Page 23 UNITS INSTALLATION 5. Check to ensure that there is no gap around the contacting surface between the indoor unit and the air – If there is a gap, even if tighten long screws sufficient, panel. Any gap may cause air leakage or dewing. readjust the height of indoor unit.
Page 24 UNITS INSTALLATION 1.4. RCD 1.4.2. INITIAL CHECK 1.4.1. FACTORY-SUPPLIED ACCESSORIES – Install the indoor unit with a proper clearance around it paying careful attention to the installation direction for Make sure that the following accessories are packed with the piping, wiring and maintenance working space, as the unit.
Page 25 UNITS INSTALLATION A (Opening) Mounting the indoor unit Drain Piping B (Suspension) Connection – Mount the suspension brackets to the suspension bolts and fix them with nuts (factory -supplied), as shown below. – Put the washer so that the surface with insulation can face downwards as shown below: (mm) Suspension bolts (field-suppl.)
Page 26 UNITS INSTALLATION – Adjust the indoor unit to the correct position while Adjusting space between indoor unit checking with the checking scales (factory-supplied). and false ceiling opening – Adjust the indoor unit to the correct position while Drain pipe checking with the installation pattern and gauge (factory-supplied) as shown below.
Page 27 UNITS INSTALLATION Removing the air intake grille from the air panel: Ò CAUTION: 1. Open the air intake grille to an angle of approx. 40° Do not turn the air louver by hand. If moved, the louver from the surface of the air panel. mechanism will be damaged.
Page 28 UNITS INSTALLATION 1.5. RPC 1.5.1. FACTORY-SUPPLIED ACCESSORIES Make sure that the following accessories are packed with – Suspension bracket has the following two (2) possible the unit. positions: NOTE: Case (a) Case (b) If any of these accessories are not packed with the unit, please contact your dealer.
Page 29 UNITS INSTALLATION Mounting the indoor unit For semi-concealed installation. – Open a hole in the false ceiling. Remove side covers of the unit. To avoid damage to the resin side covers, before lifting (mm) or moving the indoor unit, remove the resin side ≥...
Page 30 UNITS INSTALLATION – The unit should be installed so that the rear side of the unit is slightly (approximately 3 mm) lower than the front side, in order to avoid the incorrect position of the drain discharge. – Tighten the nuts of the suspension bolts with the suspension brackets after adjustment is completed.
Page 31 UNITS INSTALLATION 1.6.3. INSTALLATION Drain pan level Make sure that the foundation is flat, taking into account Mounting the suspension bolts the maximum foundation gradient. – Using the aforementioned dimension select the final Front view location and installation direction of the indoor unit paying careful attention to the space for the piping, wiring and maintenance.
Page 32 UNITS INSTALLATION – For RPI 8~10, the filter is divided in three parts. 1.6.6. AIR SUCTION DIRECTION CHANGE – When the unit is installed, the filter should be fixed, installed and uninstalled through the fan cover – Air suction direction could be modified changing back access.
Page 33 UNITS INSTALLATION 1.7. RPK 1.7.1. FACTORY-SUPPLIED ACCESSORIES 1.7.2. INITIAL CHECK – Install the indoor unit with a proper clearance around Make sure that the following accessories are packed with it for operation and maintenance working space as the unit. shown below. NOTE: Wall (mm)
Page 34 UNITS INSTALLATION RPK-2.5~4.0 1.7.3. INSTALLATION Screws marked with * should be tightened utilizing upper holes Mounting the suspension bracket Pillar Mounting bracket Although the illustrations used for some examples belong to RPK-2.5~4.0 models, the information supplied applies to all the wall type models. –...
Page 35 UNITS INSTALLATION Removing the front panel Putting back the front panel – In order to connect the refrigerant piping, the wiring RPK-1.5FSN1M and to check the drain water flow, it is necessary to – Firstly put back the upper side of the front panel remove the front panel.
Page 36 UNITS INSTALLATION 1.7.4. DIMENSIONS OF THE MOUNTING BRACKET RPK-1.5FSN1M Mounting bracket Contour of the unit RPK-1.5~2.0FSNM Mounting bracket Contour of the unit RPK-2.5~4.0FSNM Mounting bracket Contour of the unit...
Page 37 UNITS INSTALLATION 1.8. RPF (FLOOR TYPE) / RPFI (FLOOR-CONCEALED TYPE) 1.8.1. FACTORY-SUPPLIED ACCESSORIES – Service access panel Provide a service access door or panel as shown below. Make sure that the following accessories are packed with the unit. NOTE: If any of these accessories are not packed with the Unit unit, please contact your dealer.
Page 38 UNITS INSTALLATION Air outlet direction change (RPFI) – Fix the base plate and back plate of the unit with field-supplied fixing bolts and screws. When attaching In case of changing the RPFI units air outlet direction from the adjusting bolts for installation, remove the upward to front, follow the procedures below: electrical wiring box.
Page 39 UNITS INSTALLATION 1.9. RAS 2~6H(V)RNE / RAS-2.5~5HN(V)E Ó Ò WARNING: CAUTION:: – Install the outdoor unit with sufficient clearance around it – Check to ensure that the foundation is flat, level and for operation and maintenance as shown in the next sufficiently strong.
Page 40 UNITS INSTALLATION (mm) e) In case of front side and either of the sides are open f) In case that surrounding wall exist (serial units) (serial units) *4/5/6HP *4/5/6HP 0 < L ≤ 1/2H → A ≥ 200 1/2H < L ≤ H → A ≥ 350 (mm) g) Horizontal (multiple units) h) Vertical (multiple units)
Page 41 UNITS INSTALLATION 1.9.3. REMOVE SHIPPING WASHER Compressor Remove the two shipping washer (yellow-painted) Securely tighten the nuts again Frame Shipping Washer (yellow painted) Rubber isolator 1 Rubber isolator 2 1.10. RAS 8~12 HRNE Ó WARNING: – Install the outdoor unit with sufficient clearance around it for operation and maintenance as shown in the next figures.
Page 42 UNITS INSTALLATION Ò CAUTION: NOTE: Aluminum fins have very sharp edges. Pay attention In certain cases, a fuse may be blown and the system to the fins in order to avoid any injury. may stop in high electro-magnetic turbulence environment. Basic space In certain cases, the system can get an alarm in high Air outlet...
Page 43 UNITS INSTALLATION 1.10.3. MULTIPLE INSTALLATION SPACE Keep the upper side open to prevent air short-circuiting. In case that the front and either of the sides are open. – Installation in the same direction No limit to wall height (mm) (Front) (Front) (Max.
Page 44 UNITS INSTALLATION – Rear to rear installation (case 1) (mm) No limit to wall height (Front) (Front) (Top view) * A space of 900 mm is recommended for easier service work – Rear to rear installation (case 2) (mm) No limit to wall height (Front) (Front) * A space of 900 mm is recommended for easier service work...
Page 45 UNITS INSTALLATION Min. 300 Fence Min. In case that the rear space is less than 1600 mm and the side space is less than 400 mm, apply a field- supplied fence for each unit. 1.10.4. FOUNDATION PROVISION Concrete foundations Foundations –...
Page 46 UNITS INSTALLATION 1.11. OPTIONAL ACCESSORIES – The maximum amount of fresh air intake is the 20% of 1.11.1. FRESH AIR INTAKE FOR 4-WAY CASSETTE Indoor Unit Air Flow Rate. In the case that fresh air that exceeds this amount is taken in, there is risk of water INDOOR UNITS (OACI-232) OR (PD-75) condensing on the lower surface of the drain-pan (Air –...
Page 47 UNITS INSTALLATION 1.11.2. T-TUBE CONNECTING KIT FOR 4-WAY 1.11.3. BRANCH DISCHARGE FOR 4-WAY CASSETTE INDOOR UNITS (TKCI-232) CASSETTE INDOOR UNITS (PDF-23C3; PDF-46C3) The T-Tube Connecting Kit is intended to make easy the connections between the Fresh Air intake and the If there are obstacles, such as partitions, inside a room connection duct.
Page 48 UNITS INSTALLATION 1.11.4. DIRECTION AIR FLOW FOR 4-WAY 2. Perform sufficient insulation treatment for the attachment portion between the connection flange and the indoor unit CASSETTE TYPE INDOOR UNITS main body as well as the attachment portion between the In the event that only three outlets are required, utilize the duct and the connection flange.
Page 49 UNITS INSTALLATION The total height of the unit is increased by approximately Specifications: 85 mm with the filter box installed. Therefore, pay attention to the installation space. For 4 Way Cassette Type Item Note that the packing dimension before compression is RCI-1.5~6.0 10 mm but, after compression is reduced to 5 mm.
Page 50 UNITS INSTALLATION To mount the filter, you need to use the Filter Box. Specifications: RCI-1.5~2.5 RCI-3.0~6.0 Item F-23L4-D F-46-L4D Dust Collection 50 (Gravimetric Method) Efficiency Air Flow /min. 20.0 37.0 Initial Pressure Pa (mmAq) 15.7 (1.6) 16.7 (1.7) Loss End Pressure Pa (mmAq) 42.2 (4.3) 33.3 (3.4)
Page 51 DRAIN PIPING 2 DRAIN PIPING This chapter describes the procedures that you must follow to install the drain piping elements for the H(V)RNE HN(V)E outdoor units and for the full range of Hitachi indoor units. CONTENTS DRAIN PIPING ____________________________________________________________ 1 2.1.
Page 52 DRAIN PIPING 2.1. GENERAL Ò CAUTION: NOTE: – Do not create an up-slope for the drain pipe. If you do Install the drainage in accordance with national so, the drain water will flow back to the unit. Then, codes and local codes. leakage to the room will occur when the unit operation is stopped.
Page 53 DRAIN PIPING 2.2. INDOOR UNITS 2.2.1. 2.2.2. RCIM – The position of the drain piping connection is shown – The position of the drain pipe connection is shown below. below. Drain Pipe Connection View from A Drain piping – Prepare a polyvinyl chloride pipe with a 32 mm outer diameter (VP25).
Page 54 DRAIN PIPING 2.2.3. 2.2.4. – The position of the drain piping connection is shown The standard direction of drain pipe connection is to the below. right side looking at the unit from the discharge grilles. However, the pipe connection can be performed from the left side if this is required due to the building construction.
Page 55 DRAIN PIPING – Insert the drain plug into the drain boss on the right – Do not connect the drain pipe with the sanitary piping, side by using a driver as shown below. the sewage piping or any other drainage piping. –...
Page 56 DRAIN PIPING Connecting a drain pipe 2.2.6. – Prepare a PVC pipe with an outer diameter of 32 mm Right side connection (RPI 1.5-6.0) or 25 mm (RPI 8/10). – Fasten the pipe to the drain hose with an adhesive –...
Page 57 DRAIN PIPING 2.2.7. RPF AND RPFI – The position of the drain pipe connection is shown in the figure. – Prepare a PVC pipe with an outer diameter of 18.5 – Fasten the pipe to the drain hose with an adhesive. Drain hose –...
Page 59 ELECTRICAL WIRING 3 ELECTRICAL WIRING This chapter describes the procedures that you must follow to create the electrical wiring connections for the H(V)RNE / HN(V)E outdoor units and for the full range of Hitachi indoor units. CONTENTS ELECTRICAL WIRING ______________________________________________________ 1 3.1.
Page 60 ELECTRICAL WIRING 3.1. GENERAL CHECK Ó 2. Following the Council Directive 89/336/EEC and its ATTENTION: amendments 92/31/EEC and 93/68/EEC, relating to – Before installing the electrical wiring or before electromagnetic compatibility, next table indicates performing a periodical check, turn OFF the main maximum permissible system impedance Z at the switch to the indoor unit and the outdoor unit.
Page 61 ELECTRICAL WIRING 3.2.2. SETTING THE DIP SWITCHES FOR DSW3: Capacity (Unit type) RAS-2~6H(V)RNE RAS-2HVRNE RAS-2.5HVRNE RAS-3HVRNE Quantity and position of DIP switches Model The PCB in the Outdoor Unit is operating with eight types of DIP switches, and three types of push switches. 1 2 3 4 1 2 3 4 1 2 3 4...
Page 62 ELECTRICAL WIRING 3.3. ELECTRICAL WIRING FOR RAS-2.5~5HN(V)E 3.3.1. ELECTRICAL WIRING CONNECTION FOR 3.3.2. SETTING THE DIP SWITCHES FOR RAS-2.5~5HN(V)E RAS-2~5HN(V)E The PCB in the Outdoor Unit is operating with 4 types of The electrical wiring connection for the outdoor units is DIP Switches, 1 Single Switch and 1 Push Switch.
Page 63 ELECTRICAL WIRING DSW4: Refrigerant cycle no. Settings DSW1: Test operation and option functions settings In the same refrigerant cycle, set the same refrigerant cycle No. For the outdoor unit and the indoor unit as shown below. Setting before the shipment 1 2 3 4 5 6 Cycle No.
Page 64 ELECTRICAL WIRING 3.4.2. SETTING THE DIP SWITCHES FOR DSW2: Capacity set RAS-8~12HRNE Model Setting Position Quantity and position of DIP switches RAS-8HRNE The PCB in the Outdoor Unit is operating with eight 1 2 3 4 types of DIP switches, and three types of push switches. RAS-10HRNE 1 2 3 4 Position of DIP switches...
Page 65 ELECTRICAL WIRING DSW6: Piping length setting DSW10: Setting for transmitting The setting for transmitting is required for the cancellation Setting before the shipment and total of end terminal resistance. length < 25m 25m ≤ Total length < 50m Before the shipment, the No.1 pin of DSW10 is set at the ON side.
Page 66 ELECTRICAL WIRING 3.5.1. ELECTRICAL WIRING CONNECTION RCI units – The electrical wiring connection for the indoor unit is shown in the following figures. For the intermediate Power Source connection between the indoor unit and the air panel, refer to chapter 1.2. RCIM Units –...
Page 67 ELECTRICAL WIRING RCD units RCIM (cont.) Connector for Auto Swing Motor The electrical wiring connection for the indoor unit is shown in the following figures. For the intermediate connection between the indoor unit and the air panel, refer to chapter 1.3. Terminal Board (TB2 Terminal Board (TB1) Cord Clamp...
Page 68 ELECTRICAL WIRING RPC units RPI-1.5 The electrical wiring connection for the indoor unit is shown in the following figures. RCS PC-P1HE Optional Transmission Knockout hole wires Connector for the wirings Grille Power wires RCS PC-2H2 Optional Electrical box Cord Clamp Electrical Box Service cover RCS-PC-P1HE...
Page 69 ELECTRICAL WIRING RPK units The following figure provides further details of the wiring connection for RPK-1.5~4.0FSNM units: The electrical wiring connection for the indoor unit is shown in the following figures. PCB1 for CN13 indoor unit Through the wiring connection hole in the cabinet, Caulking work connect the cable of an optional remote control Remote control...
Page 70 ELECTRICAL WIRING RPF\RPFI units 3.5.2. SETTING THE DIP SWITCHES FOR THE INDOOR UNIT Remove the front panel and the side panel. Quantity and position of the DIP switches – The wiring from the left-rear side to the RPF is shown below.
Page 71 ELECTRICAL WIRING RPK-FSN1M DSW2: optional functions setting (only RPK FSNM) No setting is required. Use this switch for setting DSW5 the optional functions as shown below. DSW2 DSW3 Factory setting 1 2 3 4 5 6 7 8 Self-inspection function 1 2 3 4 5 6 7 8 Room thermostat is used DSW7...
Page 72 ELECTRICAL WIRING DSW6: setting the unit model code DSW8: Not used (RCI only) (Not available for RCI and RPK) Setting before shipment. No setting is required. Use this switch for setting the model code that corresponds to the indoor unit type. Indoor unit model code DSW6 setting SSW: remote control system...
Page 73 ELECTRICAL WIRING 3.6. COMMON WIRING – If there are multiple outdoor units that are connected 3.6.1. ELECTRICAL WIRING BETWEEN THE to one power supply wire, open a hole near the INDOOR UNIT AND THE OUTDOOR UNIT connection hole for the power supply wiring. The recommended breaker sizes are shown in the table Ò...
Page 74 ELECTRICAL WIRING RAS-4~12HRNE / RAS-2.5~5HNE Models: RAS-4HRNE RAS-5HRNE RAS-6HRNE RAS-8HRNE RAS-10RHNE RAS-12RHNE No.0 system No.1 system No.2 system RAS-2.5HNE outdoor unit outdoor unit outdoor unit RAS-3HNE RAS-4HNE RAS-5HNE Earth leakage breaker Operating line (shielded twisted pair cable or twisted cable) Main switch DC5V (non-pole transmission, H-LINK system)
Page 75 The above wire sizes marked with – are selected at the maximum current of the unit according to the European Standard, EN60 335-1. The above wire sizes marked with — are selected at the maximum current of the unit according to the wire, MLFC (Flame Retardant Polyflex Wire) manufactured by HITACHI Cable Ltd. Japan.
Page 76 ELECTRICAL WIRING If the power cables are connected in series, add each unit maximum current and select according to the next table. Selection according to Selection according to MLFC EN60 335-1 (at cable Temp. Of 60 °C) Wire Size Current i Wire Size Current i (A) (mm²)
Page 77 ELECTRICAL WIRING Specifications: 3.6.2. H-LINK SYSTEM – Transmission Wire: 2-Wire – Polarity of Transmission Wire: Non-Polar Wire NOTE: – Maximum Outdoor Units To Be Connected: 16 Units The H-LINK system can not be applied to the cycle per H-LINK system. with the old model unit or the unit with old transmission.
Page 78 ELECTRICAL WIRING Using H-Link connection for conditioning with Electrical wiring central control device SYSTEM – In case that H-LINK is not applied when you are installing the electrical wiring. Outdoor unit Control station Outdoor Units H-LINK 1 Indoor unit H-LINK H-LINK 2 H-LINK 3 relay...
Page 79 ELECTRICAL WIRING Test run – If there are only indoor units, set the end terminal resistance at the H-LINK relay. If the H-LINK relay is After completing the installation of the H-LINK, you need to connected to CN1, set the No.1 pin of DSW1 at the perform the test run of the PSC-5HR.
Page 81 4 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH This chapter describes the procedures that you must follow to install the optional remote control switches that work with the H(V)(R)NE outdoor units and the full range of Hitachi indoor units. CONTENTS INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH__________________ 1 4.1.
Page 82 Also, if you operation switches do not function well, turn OFF use long cables, transmission errors may occur. the main power source. Then, contact your HITACHI distributor or your HITACHI dealer. – DO NOT run any transmission cable and any signal cable along the power supply wire –...
Page 83 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH Standard capable distance for receiving the air panel Standard efficient distance for receiving the air panel signal for the wireless control. signal for the wireless control. (Example with the 4-way cassette) (View from above) (Example with the 4-way cassette) Conditions: Typical office room.
Page 84 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH 4.1.3. INSTALLATION PROCEDURE Band (field-supplied) Cable – Insert the edge of the flat-headed screwdriver into the dent parts at the bottom of the holding bracket. Next, push and turn the screwdriver. Then, remove the remote control switch from the holding bracket as shown in the figure below.
Page 85 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH – Mounting procedures. Max. 16 indoor units 1. Insert the hooks of the remote control switch into the holes at the top of the holding bracket. Remote control Electrical box Electrical box Remote control 2.
Page 86 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH If multiple indoor units are controlled simultaneously, set the refrigerant cycle number and the address of the indoor units as shown below. Address of the indoor units: Master unit unit unit unit unit unit unit unit...
Page 87 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH 4.2.4. ELECTRICAL WIRING Standard wiring Band Ring core Lead the cable through the groove Insert the connector Remote control switch cable Ó If you are using the switch box: ATTENTION: Prepare the field-supplied JIS Box (JIS C8336-1988). –...
Page 88 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH There are optional cables of 0.75 mm² wire. The cables Ò have different lengths. The cables are also fitted with CAUTION: connectors. If multiple indoor units are controlled simultaneously, set the refrigerant cycle number and the address of Remote control cable (optional) the indoor units as shown below.
Page 89 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH 4.3. INSTALLATION OF THE CENTRAL STATION <PSC-5S> 4.3.1. ACCESSORIES Holding bracket Check the contents and the number of accessories in the packing. HITACHI GROUP Two screws M4x16L. for fixing Central station the holding bracket onto the wall NOTE:...
Page 90 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH 4.3.4. ELECTRICAL WIRING Wiring connection You can connect up to eight central stations to the H-LINK. To be connected to the terminal boards 1 and 2 of the indoor unit or the Outdoor unit outdoor unit H-LINK Power supply...
Page 91 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH System layout Otherwise, the display is the following: Each central station can control up to 16 indoor units or 16 groups of indoor units. (One group of indoor units is all the units that are controlled by the same remote control switch).
Page 92 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH Ò The condition of the master unit setting for each CAUTION: group: (× is ON: The master unit is set; × is OFF: - You can set only one indoor unit as the master unit in The master unit is not set).
Page 93 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH Ò CAUTION: Instructions for setting the slave unit – You can set up to 15 slave units in one group. Set the slave unit for each group as follows. (The maximum in one group is 16 units, including the master unit).
Page 94 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH 4.3.5. INPUT/OUTPUT FUNCTION 2. Simultaneous operation, pulse signal; simultaneous stoppage, pulse signal The central station has two input functions and two output This is a remote ON/OFF function that uses the pulse functions as shown below. signal.
Page 95 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH 4. Demand The group that is already set with the demand This is a remote thermostat signal for the selected units. control is displayed: (× is ON: the demand is set; × Only the units with the DEMAND indication will follow this is OFF: the demand is not set).
Page 96 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH 6. Simultaneous alarm output 2. Display of the option setting mode You use this function in order to check the alarm When the central station changes to the option setting status of the units that are controlled by the central mode, the LCD of the central station is the following.
Page 97 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH 4.3.7. INITIALIZATION OF THE CENTRAL 2. Initialization STATION When the central station changes to the initialization mode, the LCD of the central station is as shown The instructions for initializing the group setting and the below.
Page 98 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH 4.4. INSTALLATION OF THE 7-DAY TIMER <PSC-5T> 4.4.1. ACCESSORIES The packing contains the following items: HITACHI GROUP Holding bracket Two screws M4x16L. Cable (1m) Control timer for fixing the holding bracket onto the wall.
Page 99 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH 3. Lead the cable through the groove. 4. Attach the timer onto the holding bracket. Attach the stopper to the cable at the inside of the draw-out hole Twisted pair cable Cable Step 1: Insert the hooks of the timer to the holes at the top side of the holding Band...
Page 100 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH 3. Attach the holding bracket onto the switch box. 2. If you are using a timer with PC-2H2: Transmission cable between outdoor unit and CN13 indoor unit (H-LINK) ↑ Fix the holding bracket with the mark "UP"...
Page 101 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH 4.4.5. SETTING THE DIP SWITCHES Set the two DIP switches on the PCB as follows. (The factory settings of the DSW1 and the DSW2 are all OFF). Setting of the DSW1 (For the address setting) Address Setting of the DSW1...
Page 102 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH 4.5. INSTALLATION OF THE RECEIVER KIT <PC-RLH8> (for RCI-FSN1E Units) 5) Draw out the connecting cable from the wiring The packing contains the following parts. Check the hole of the indoor unit, and lead the cable over the contents and the number of the parts.
Page 103 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH 8) Hook the other fixing nails (3 positions) at the square holes of air panel. NOTE: When removing the receiver kit after installing the air panel: – The corner position of the receiver kit can be lifted when a coin or a "-"...
Page 104 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH 4.6. INSTALLATION OF THE RECEIVER KIT <PC-RLH9> (for RCD-FSN Units) 5. Remove the panel of the electrical box of the indoor unit. Then, connect the cable to the terminals A and B of the The packing contains the following items.
Page 105 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH 4.7. INSTALLATION OF THE EXTERNAL RECEIVER KIT <PC-RLH11> The packing contains the following items. Check the contents and the number of items in the packing. 2) Cut one of the knockout holes (*) at the panel. Mod.
Page 106 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH 2) Insert the cable into the rigid metal conduit tube. 6. Remove the panel of the electrical box of the indoor unit. Then, connect the cable to the terminals A and B of the white terminal board.
Page 107 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH 5 Draw out the connecting cable from the wiring hole of NOTE: the indoor unit, and lead the cable over the to the When removing the receiver kit after installing the air installing position of the receiver kit. panel: 6 Install the air panel (option) onto the indoor unit.
Page 108 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH 4.9. HARC-BX(A/B) 4.9.1. PART NAMES 4.9.2. INSTALLATION PROCEDURE Each part name of the HARC-BX E is shown in the next 1. Install the HARC-BX E by keeping the screw terminal figure. board at the lower side. Power source terminal Upward to be connected to the...
Page 109 (*) Make sure that you apply the twisted cables. respectively. In order that PCB would be able to communicate with unit it must be connected to same H-LINK than unit. Recommended types of cables: Japan Cable Integral Hitachi Cable Japan Cable Industrial power Co., Ltd. Co., Ltd. Associations...
Page 110 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH 4.9.5. TEST RUN 4.9.6. MAINTENANCE AND SERVICE Setting the DIP switch Self-Inspection of the HARC-BX E In order to identify the abnormal operation of the HARC-BX E, 1. Set the DIP switch before turning on the power supply. perform the self-inspection according to the following 2.
Page 111 INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH 4.10. CS-NET INTERFACE (HARC40) CONNECTION HARC40 with the USB connection Layout of the HARC40 interface Since the ISA Board connections have been phased out On the opposite side you can see the layout of the printed in the computer design, an external interface with a USB circuit board of the HARC40 interface.
Page 113 CONTROL SYSTEM 5 CONTROL SYSTEM This chapter presents the control system flowcharts for the H(V)RNE / HN(V)E Outdoor Units series and the complete range of the Hitachi Indoor Units. CONTENTS CONTROL SYSTEM _______________________________________________________ 1 5.1. Device Control System ______________________________________________________ 2 5.1.1.
Page 114 CONTROL SYSTEM 5.1. DEVICE CONTROL SYSTEM 5.1.1. RAS-2~6H(V)RNE Purpose Control Subject Cooling Operation Heating Operation Defrost Operation Control Frequency of Inverter Adjust the capacity of the indoor unit Adjust the capacity of the indoor unit Fixed frequency Compressor depending on difference between air depending on differences between air inlet temperature and setting inlet temperature and setting...
Page 115 CONTROL SYSTEM 5.1.2. RAS-2~5H(V)NE Purpose Control Subject Cooling Operation Heating Operation Defrost Operation Opening Degree Expansion Valve For controlling temperature of discharge open Fully of Outdoor Unit gas superheat: TdSH=20K Opening Degree Expansion Valve For controlling temperature of discharge For controlling temperature of Discharge Opening fixed of Indoor Unit...
Page 116 CONTROL SYSTEM 5.1.3. RAS-8~12HRNE Cooling process Heating process Defrost operation Control subject Purpose Contents Purpose Contents Contents Inverter frequency 1. Total operation 1. 15 Hz/HP 1. Total operation 1. 15 Hz/HP All compressors of the compressor capacity of the capacity of the while they indoor unit indoor unit...
Page 117 CONTROL SYSTEM Cooling process Heating process Defrost operation Control subject Purpose Contents Purpose Contents Contents Outdoor fan 1. 2.3 ≤ Pd ≤2.7 1. Fix according 1. PWM control Stoppage (MPa) to the outdoor by DC motor PWM control temperature and outdoor Temp.
Page 118 CONTROL SYSTEM 5.2. INDOOR UNIT PCB 5.2.1. LAYOUT OF THE PRINTED CIRCUIT BOARD FOR RCI PCB drawing The PCB in the indoor unit operates with three types of DIP switches, and one rotary switch. The location is as follows: LED INDICATION This LED indicates the LED1 transmission status between...
Page 119 CONTROL SYSTEM 5.2.2. LAYOUT OF THE PRINTED CIRCUIT BOARD FOR RCD PCB drawing The PCB in the indoor unit operates with four types of DIP switches, one sliding switch and one rotary switch. The location is as follows: LED INDICATION This LED indicates the LED1 transmission status between...
Page 120 CONTROL SYSTEM 5.2.3. LAYOUT OF THE PRINTED CIRCUIT BOARD FOR RPI 1.5~6.0, RPC, RPF(I) PCB drawing The PCB in the indoor unit operates with four types of DIP switches, one sliding switch, and one rotary switch. The location is as follows: LED INDICATION LED1 Green...
Page 121 CONTROL SYSTEM 5.2.4. LAYOUT OF THE PRINTED CIRCUIT BOARD FOR RPI 8/10 PCB drawing The PCB in the indoor unit operates with four types of DIP switches and one rotary switch. The location is as follows: LED INDICATION LED1 Green Power source for the PCB This LED indicates the transmission status between...
Page 122 CONTROL SYSTEM 5.2.5. LAYOUT OF THE PRINTED CIRCUIT BOARD FOR RPK FSNM PCB drawing The PCB in the indoor unit operates with four types of DIP switches, one sliding switch, one rotary switch and one push switch. The location is as follows: LED INDICATION This LED indicates the LED1...
Page 123 CONTROL SYSTEM 5.2.6. LAYOUT OF THE PRINTED CIRCUIT BOARD (ONLY RPK-1.5FSN1M) PCB drawing The PCB in the indoor unit operates with four types of DIP switches, one sliding switch, one rotary switch and one push switch. The location is as follows: LED INDICATION LED1 Green...
Page 124 CONTROL SYSTEM 5.3. OUTDOOR UNITS PCB 5.3.1. RAS-(2~6)H(V)RNE PCB drawing LED INDICATION This LED indicates the transmission status LED1 between the indoor unit and the RCS This LED indicates the transmission status LED2 Yellow between the indoor unit and the outdoor unit LED3 Green Power source for the PCB...
Page 125 CONTROL SYSTEM 5.3.2. RAS-(8~12)HRNE PCB drawing LED INDICATION Power source for PCB1 LED1 Normal condition: activated Abnormal condition: deactivated This LED2 indicates the transmission status between PCB1 and PCB3 LED2 Green Normal condition: flickering Abnormal condition: activated or deactivated This LED3 indicates the transmission status between the indoor unit and the outdoor unit LED3 Yellow Normal condition:...
Page 126 CONTROL SYSTEM 5.3.3. RAS-(2.5~5)HN(V)E PCB drawing LED INDICATION LED1 Power source for the PCB This LED indicates the transmission status LED2 Yellow between the indoor unit and the outdoor unit CONNECTOR INDICATION SWITCH INDICATION PCN1 Fuse DSW1 Test Run PCN2 PCB1 connection from Outdoor to Indoor unit DSW3 Capacity...
Page 127 CONTROL SYSTEM 5.4. PROTECTION AND SAFETY CONTROL Compressor protection The following devices and their combinations protect the compressor: This switch cuts out the operation of the compressor when the discharge pressure exceeds High-Pressure switch the setting. This band heater protects against the oil carry-over during the cold starting, as the band heater is Oil heater energized while the compressor is stopped.
Page 128 CONTROL SYSTEM RAS-(2.5~5)HN(V)E Model RAS-2.5 RAS-3 RAS-4 RAS-5 -0.05 -0.05 -0.05 -0.05 4.15 4.15 4.15 4.15 Cut-Out High Pressure Switch For -0.15 -0.15 -0.15 -0.15 Compressor ± 0.15 ± 0.15 ± 0.15 ± 0.15 Cut-In 3.20 3.20 3.20 3.20 Oil Heater For Capacity Compressor CCP Timer (1)
Page 129 CONTROL SYSTEM 5.6. STANDARD OPERATION SEQUENCE 5.6.1. COOLING PROCESS Cooling process RAS-(2~6)H(V)RNE 2/4 HVRNE, 4/5/6 HRNE only < > £ -5 ºC £ 65 ºC Power to Power to PCB in Outdoor Compressor Power to CH : ON O.U.: ON O.U.: ON Temp.
Page 130 CONTROL SYSTEM Cooling process RAS-(2~6)H(V)RNE (cont.) Start of Auto-Louver only for Air Panel Pressing Alternatively or Indoor Unit with AUTO-LOUVER Auto-Louver Switch Stop of Auto-Louver Power to CMC1 , CMC2 : OFF Stop of Inverter Power to Y52C : OFF Pressing RUN/STOP Switch...
Page 131 CONTROL SYSTEM Cooling process RAS-(2.5~5)HN(V)E £ 65 ºC Power to Power to PCB in Compressor Power to CH : ON O.U.: ON O.U.: ON Temp. ³ 80 ºC Power to CH : OFF Auto - louver only for indoor unit Start of Transmission between 0 Reset with auto - louver...
Page 132 CONTROL SYSTEM Cooling process RAS-(2.5~5)HN(V)E (cont) Start of Auto-Louver only for Air Panel Pressing Alternatively or Indoor Unit with AUTO-LOUVER Auto-Louver Switch Stop of Auto-Louver Power to Y52C : OFF Power Outdoor 52C : OFF Stop of compressor Pressing RUN/STOP Switch Stopping of Outdoor Fan MOF1 MOF2 : OFF...
Page 133 CONTROL SYSTEM Cooling process RAS-(8~12)HRNE Power to CH2 : ON Power to CH1 Power to Reverse Phase O.U.: ON (Alarm Code 05) Power to PCB in Power to O.U.: Is phase Correct phase O.U.: ON correct? Auto - louver only for indoor unit 0 Reset Start of Transmission with auto - louver...
Page 134 CONTROL SYSTEM Cooling process RAS-(8~12)HRNE (cont) Start of Auto-Louver only for Air Panel Pressing Alternatively or Indoor Unit with AUTO-LOUVER Auto-Louver Switch Stop of Auto-Louver Power to Y52C : OFF Stop of MC1 , MC2 Power to CMC1 , CMC2 : OFF Pressing RUN/STOP Switch...
Page 135 CONTROL SYSTEM 5.6.2. DRY OPERATION Dry operation RAS-(2~6)H(V)RNE 2/4 HVRNE,4/5/6 HRNE only < > £ £ -5 ºC 65 ºC Power to Power to PCB in Outdoor Compressor Power to CH : ON O.U.: ON O.U.: ON Temp. Temp. > -5 ºC ³...
Page 136 CONTROL SYSTEM Dry operation RAS-(2~6)H(V)RNE (cont.) Start of Auto-Louver only for Air Panel Pressing Alternatively or Indoor Unit with AUTO-LOUVER Auto-Louver Switch Stop of Auto-Louver Power to CMC : OFF Stop of Inverter Power to Y52C : OFF Pressing RUN/STOP Switch Stop of MC After...
Page 137 CONTROL SYSTEM Dry operation RAS-(2.5~5)HN(V)E £ 65 ºC Power to Power to PCB in Compressor Power to CH : ON O.U.: ON O.U.: ON Temp. ³ 80 ºC Power to CH : OFF Auto - louver only for indoor unit 0 Reset Start of Transmission between with auto - louver...
Page 138 CONTROL SYSTEM Dry operation RAS-(2-5~5)HN(V)E (cont) Start of Auto-Louver Pressing Alternatively only for Units with AUTO-LOUVER Auto-Louver Switch Stop of Auto-Louver Stop of Compressor Power Off to Outdoor Power to Y52C : OFF Pressing MC : OFF 52C : OFF RUN/STOP Switch Stopping of Outdoor Fan...
Page 139 CONTROL SYSTEM Dry operation RAS-(8~12)HRNE Power to CH2 : ON Power to CH1 Power to Reverse Phase O.U.: ON (Alarm Code 05) Power to PCB in Power to O.U.: Is phase Correct phase O.U.: ON correct? Auto - louver only for indoor unit 0 Reset Start of Transmission with auto - louver...
Page 140 CONTROL SYSTEM Dry operation RAS-(8~12)HRNE (cont) Start of Auto-Louver only for Air Panel or Pressing Alternatively AUTO-LOUVER Indoor Unit Switch with Auto- Louver Stop of Auto-Louver Power to Y52C : OFF Stop of MC1 , MC2 Power to CMC1 , CMC2 : OFF Pressing RUN/STOP Switch...
Page 141 CONTROL SYSTEM 5.6.3. HEATING PROCESS Heating process RAS-(2~6)H(V)RNE < 2/4 HVRNE,4/5/6 HRNE only > £ -5 ºC £ 65 ºC Power to Power to PCB in Outdoor Compressor Power to CH : ON O.U.: ON O.U.: ON Temp. Temp. > -5 ºC ³...
Page 142 CONTROL SYSTEM Heating process RAS-(2~6)H(V)RNE (cont.) Start of Auto-Louver only for Air Alternatively Panel or Pressing Indoor Unit AUTO-LOUVER with Auto- Switch Louver Stop of Auto-Louver Power to Y52C: OFF Power to CMC : OFF Stop of MC Pressing RUN/STOP Switch Stop of MOF Power to 52H : OFF...
Page 143 CONTROL SYSTEM Heating process RAS-(2.5~5)HN(V)E £ 65 ºC Power to Power to PCB in Compressor Power to CH : ON O.U.: ON O.U.: ON Temp. ³ 80 ºC Power to CH : OFF Start of Transmission between Power to PCB in Power to I.U.
Page 144 CONTROL SYSTEM Heating process RAS-(2.5~5)HN(V)E (cont) Start of Auto-Louver only for Air Alternatively Panel or Pressing Indoor Unit AUTO-LOUVER with Auto- Switch Louver Stop of Auto-Louver Power to 21 OFF Pressing Power to Y52C: OFF Power to 52C : OFF RUN/STOP Switch Stop of compressor MC OFF...
Page 145 CONTROL SYSTEM Heating process RAS-(8~12)HRNE Power to CH2 : ON Power to CH1 Power to Reverse Phase O.U.: ON (Alarm Code 05) Power to PCB in Power to O.U.: Is phase Correct phase O.U.: ON correct? Auto - louver only for indoor unit 0 Reset Start of Transmission with auto - louver...
Page 146 CONTROL SYSTEM Heating process RAS-(8~12)HRNE (cont.) Start of Auto-Louver only for Air Panel or Pressing Alternatively Indoor Unit AUTO-LOUVER with Auto- Switch Louver Stop of Auto-Louver Stop of MC1 , MC2 Power to Y52C: OFF Power to CMC1 , CMC2 : OFF Pressing RUN/STOP Switch...
Page 147 CONTROL SYSTEM 5.6.4. DEFROST OPERATION CONTROL Defrost operation control RAS-(2~6)H(V)RNE Heating Operation Power to RVR : OFF Defrosting DEFROST Indication Start Condition Power to MIF : OFF Power to Y52F : OFF Power to MOF : OFF Comp. Defrosting (4~6 HP only) Power to RVR : ON MOF Run Frequency...
Page 148 CONTROL SYSTEM Defrost operation control RAS-(2.5~5)HN(V)E Heating Operation Power to RVR : OFF Defrosting DEFROST Indication Start Condition Power to MIF : OFF Power to Y52F : OFF Power to MOF : OFF Defrosting Power to RVR : ON MOF Run After 15 sec.
Page 149 CONTROL SYSTEM Defrost operation control RAS-(8~12)HRNE Heating Temperature Difference between Heating Operation Time Outdoor Temperature (Ta) and 40 Minutes or Above Evaporating Temperature (Te) at Heat Exchanger Small Defrosting DEFROST on LCD appears according to indoor heat load RVR1 : ON Outdoor FAN MOF : OFF Indoor FAN MIF :OFF 1 Minute Later...
Page 150 CONTROL SYSTEM 5.7. STANDARD CONTROL FUNCTION 5.7.1. FREEZING PROTECTION CONTROL DURING THE COOLING PROCESS OR DRY OPERATION Power Supply Cooling Operation or Dry Operation * sensing period will Is compressor operated for change depending on the more than 30 min.? conditions Cooling Operation or Dry Operation...
Page 151 CONTROL SYSTEM 5.7.2. OVER HEATING PROTECTION CONTROL OF THE OUTLET TEMPERATURE Heating Operation Lower than 65 C Outlet Air Temp. Of Higher than 65 C CMC : OFF Compressor Stop Is it continuous more than 3 min? Higher than 60 Discharge Air Temp.
Page 152 CONTROL SYSTEM 5.7.3. CONTROL FOR AUTOMATIC COOLING AND HEATING PROCESS Auto Cool/Heat Operation Lower than Setting Temp. Outlet Air Temp. Of Higher than Setting Temp. Cooling Operation Heating Operation Higher than Lower than Setting Temp. +3 ºC Setting Temp. -3 ºC Inlet Air Temp.
Page 153 CONTROL SYSTEM 5.7.4. CONTROL OF EXPANSION VALVE FOR THE PLATE HEAT EXCHANGER RAS-(8~12)HRNE Cooling Operation Protection Control for Td > 100 ºC Compressor Frequency Higher Temp. Area Compressor Frequency Fully Close of Exp. Valve PID Control for Plate Heat Exchanger Suitable (Liquid injection) Temp.
Page 154 CONTROL SYSTEM 5.7.5. INDOOR UNIT ELECTRICAL EXPANSION Td1: Influence of indoor inlet temperature (Ti) Td1 = 0.25 x (Ti – 27) VALVE CONTROL Td2: Influence of outdoor inlet temperature (Ta) 1. After supplying power source, the electronic expansion – In case of 29°C<Ta; Td2=Ta – 35 valve is completely closed in order to initialize its opening –...
Page 155 CONTROL SYSTEM 5.7.7. COMPRESSOR OPERATION CONTROL RAS-(8~12)HRNE RAS-8HRNE RAS-10HRNE Constant Speed Constant Speed Compressor Compressor Inverter Compressor Inverter Compressor Frequency (Hz Frequency (Hz Target Frequency (Hz) Target Frequency (Hz) RAS-12HRNE Constant Speed Compressor Inverter Compressor Frequency (Hz Target Frequency (Hz)
Page 156 CONTROL SYSTEM 5.7.8. ACTIVATION FOR PROTECTION DEVICE CONTROL RAS-(2~6)H(V)RNE Excessively High FS : OFF Power to H2 : YH2 : Close MD : ON Drain Water Level Alarm of “RUN” Light I.U. PCB Flickers Excessively High ITI : Open MIF : Stop Temp.
Page 157 CONTROL SYSTEM RAS-(2.5~5)HN(V)E OPERATION Excessively High Contact Opening Power to MD : ON Drain Water Level YH2 : OFF Detection of “RUN/STOP” LED Protection Device in Flickers PCB in Indoor Unit Excessively High b Contact closing Stopping of Indoor Temp. of I.U. Fan 49FE Fan MFE OFF Motor...
Page 158 CONTROL SYSTEM 5.7.9. OUTDOOR FAN CONTROL DURING HEATING OPERATION RAS-(2~6)H(V)RNE Inlet Air Temp. Of Operation Indoor Unit Fan step (ºC) 30% Area 10 sec. 100% Air Flow Volume Air Flow Ratio: 30% Area Outdoor Temp. (ºC) Air Flow Ratio: 30% Air Flow Ratio: 100% Is fan operated more than...
Page 159 CONTROL SYSTEM RAS-(2.5~5)HN(V)E Inlet Air Temp. Of Operation Indoor Unit Fan step (ºC) 30% Area 10 sec. 100% Air Flow Volume Fan Step Area Outdoor Temp. (ºC) Fan step Air Flow Rate: 100% Is fan operated more than 30 sec? Pressure Switch Outdoor Fan 60% for control: ON...
Page 160 CONTROL SYSTEM 5.7.10. OUTDOOR FAN CONTROL DURING COOLING OPERATION RAS-(2~6)H(V)RNE 1* Fan step at start Operation Outdoor Temperature OTAir Flow Rate £ 3 ºC 10 sec. < OT £ 100% Air Flow Volume 3 ºC 3 ºC 9 ºC < £...
Page 161 CONTROL SYSTEM 5.7.11. PREHEATING CONTROL OF COMPRESSOR RAS-(2~6)H(V)RNE Operation (Only 4HVRNE) Temp. on Stop Comp. the top of Comp.: by pressing RUN/STOP Switch £ 65 ºC Temp. on Ambient Temp.: the top of Comp. £ -5 ºC £ 20 ºC CH : ON Temp.
Page 162 CONTROL SYSTEM 5.7.12. PREVENTION CONTROL FOR HIGH PRESSURE INCREASE RAS-(2~6)H(V)RNE This function is performed to prevent the abnormal condition (Alarm: 02) when the outdoor air flow is decreased by a seasonal wind against air outlet. When the CMC is ON during cooling operation, PSC is ON and Tc is ≥ than Tc1+4 °C (4/5HP) or Tc ≥ Tc1+ 3 °C and Compressor Top Temperature >...
Page 163 AVAILABLE OPTIONAL FUNCTIONS 6 AVAILABLE OPTIONAL FUNCTIONS This chapter provides information about the optional functions available for the H(V)RNE / HN(V)E Outdoor Units and the complete range of Hitachi indoor units. CONTENTS AVAILABLE OPTIONAL FUNCTIONS __________________________________________ 1 6.1. Indoor Unit (Except RPK) ____________________________________________________ 2 6.1.1.
Page 164 AVAILABLE OPTIONAL FUNCTIONS 6.1. INDOOR UNIT (EXCEPT RPK) At the condition of the above item (a), press the TEMP = switch or the TEMP < switch of the remote 6.1.1. INPUT SETTING AND OUTPUT SETTING control switch. Then, you can change the indoor unit OF THE CONNECTOR OF THE INDOOR for the input setting and the output setting.
Page 165 AVAILABLE OPTIONAL FUNCTIONS Selection of other indoor unit Indications, the input signals and the output signals At the optional setting mode, press the TEMP = switch Indication Input signal Output signal or the TEMP < switch. Then, the condition of the Not set Not set remote control switch changes and you can select the...
Page 166 AVAILABLE OPTIONAL FUNCTIONS ON/OFF function 2 of the remote control 6.1.2. ON/OFF FUNCTION OF THE REMOTE operation / stop (pulse signal input) CONTROL This is a remote ON/OFF function that uses the pulse This function provides a control to stop the system and to signal.
Page 167 AVAILABLE OPTIONAL FUNCTIONS 6.1.3. CANCELLATION OF THE COMMANDS 6.1.4. SETTING THE COOLING MODE OR THE FROM THE REMOTE CONTROL SWITCH HEATING MODE AFTER THE ENFORCED STOPPAGE By means of this function, you can change the cooling mode or the heating mode by giving a contact signal from You can stop the air conditioning systems by means of the the outside to the unit.
Page 168 AVAILABLE OPTIONAL FUNCTIONS 6.1.5. CONTROL BY MEANS OF A FIELD- 6.1.6. CONTROL BY MEANS OF A REMOTE TEMPERATURE SENSOR SUPPLIED ROOM THERMOSTAT ( / ) By using an optional remote temperature sensor, the If you use a field-supplied room thermostat instead of the following functionalities are available: air inlet thermistor of the indoor unit, connect the wires as shown below.
Page 169 AVAILABLE OPTIONAL FUNCTIONS 6.1.7. PICKING UP THE SIGNALS 3. Picking up the cooling process signal ( ) You use this function in order to pick up the cooling By means of this function, you can pick up the signals that process signal. The contact of the auxiliary relay X1 is are displayed.
Page 170 AVAILABLE OPTIONAL FUNCTIONS 6. Picking up the Thermo-ON signal during the heating 5. Picking up the heating process signal ( ) process ( ) You use this function in order to pick up the heating process signal. The contact of the auxiliary relay X1 is You use this function in order to pick up the Thermo-ON closed when the heating process signal is ON despite signal of the running compressor during the heating...
Page 171 AVAILABLE OPTIONAL FUNCTIONS Remote control 2 (pulse signal input) () The specifications of the required components are the following: This is a remote ON/OFF function that uses the pulse signal. The basic wiring and the time chart are shown Manufacturer or Component Remarks below.
Page 172 AVAILABLE OPTIONAL FUNCTIONS 6.2.2. CANCELLATION OF THE COMMANDS 6.2.3. REMOTE COOLING / HEATING MODE FROM THE REMOTE CONTROL SWITCH CHANGEOVER () AFTER THE ENFORCED STOPPAGE ( ) By means of a remote position, you can change the This function, which uses the level signal, provides a operation mode of the unit from the heating mode to the control to stop the system and to lock the remote control cooling mode and vice versa.
Page 173 AVAILABLE OPTIONAL FUNCTIONS Indoor unit PCB 6.2.4. AUTOMATIC OPERATION WHEN POWER SUPPLY IS ON () If the power supply is interrupted for short periods of time (up 1 2 3 4 5 6 7 8 to two seconds), the remote control switch will retain the DSW2 settings.
Page 174 AVAILABLE OPTIONAL FUNCTIONS 6.3. OUTDOOR UNITS RAS-2.5~5HN(V)E 6.3.1. RELEASE AMBIENT TEMPERATURE Standard Specifications LIMIT DSW1 Dip Switch By setting the dip switch, the heating and cooling operation Setting through the year is available. 1 2 3 4 5 6 The heating operation is continued under a high outdoor temperature and the cooling operation is continued under low outdoor temperature.
Page 175 AVAILABLE OPTIONAL FUNCTIONS 6.3.3. DEMAND THERMO OFF 6.3.4. DEFROST INDOOR UNIT FAN SPEED In the case that the demand input terminals on the outdoor By using this option the Indoor Unit fan speed during PCB are short-circuited, compressor is stopped. In this defrosting period can be selected.
Page 176 AVAILABLE OPTIONAL FUNCTIONS 6.4. OUTDOOR UNITS RAS-2.5~6H(V)RNE 6.4.1. DEMAND 6.4.2. RELEASE AMBIENT TEMPERATURE LIMIT In the case that the demand input terminals on the outdoor unit printed circuit board are short-circuited, compressor is By setting the dip switch, the heating and cooling operation stopped.
Page 177 AVAILABLE OPTIONAL FUNCTIONS 6.4.3. DEFROSTING CONDITION CHANGEOVER 6.4.4. NIGHT SHIFT (LOW SOUND) OPERATION DSW1 is set at OFF before shipment. The night shift (low sound) operation can be set by Turn OFF the main switch and set the dip switch. switching No.
Page 178 AVAILABLE OPTIONAL FUNCTIONS This option gives: Indoor Unit fan speed at slow during defrosting (same situation than G5) Discharge Air Discharge Air Temperature Temperature (°C) (°C) Setting Air Flow SLOW STOP Heat Heat Heat Defrost Comp. Stop by Thermostat To select the option, the jumper JP8 of the Outdoor Unit PCB must be cut.
Page 179 AVAILABLE OPTIONAL FUNCTIONS 6.5. OUTDOOR UNITS RAS-8~12HRNE Indications of the input signal and the output signal 6.5.1. INPUT SETTING AND OUTPUT SETTING Function OF THE OUTDOOR UNIT CONNECTOR Input signal Output signal On the printed circuit board of the outdoor unit, there are Fixing heating mode Operation signal three input ports (CN17, CN18), which receive the external...
Page 180 AVAILABLE OPTIONAL FUNCTIONS Selection of the input signal If the below setting change is required on-site, perform the 3. After selecting the input/output terminal name, select following instructions: your required function by pushing the PSW1. 1. While the outdoor unit is ON, set the following DIP *) This number is increased by 1 SEG2 SEG1*...
Page 181 AVAILABLE OPTIONAL FUNCTIONS 6.5.3. DEMAND ( ) 6.5.5. ENFORCED STOPPAGE () If the demand input terminals on the printed circuit board of If the enforced stoppage input terminals (#1 and #2 of the outdoor unit are short-circuited, the compressor(s) will CN18) on the outdoor unit PCB are short-circuited during stop.
Page 182 AVAILABLE OPTIONAL FUNCTIONS 6.5.7. AVAILABLE OPTIONAL FUNCTIONS BY PRESSURE SWITCHES SEG2 SEG1 Í Function setting Not available Cancellation of outdoor If the above setting change is required on-site, perform the hot-start limit PSW1 following instructions. 1. While the outdoor unit is ON, set the following DIP switches on the printed circuit board of the outdoor unit Available as follows: set the No.4 pin of DSW4 to ON;...
Page 183 AVAILABLE OPTIONAL FUNCTIONS Frequency range 6.5.8. INDOOR FAN CONTROL DURING THERMO OFF AT HEATING Outdoor unit Minimum Maximum Conditions The indoor fan operates for two minutes and stops for capacity (HP) frequency frequency six minutes as a cycle when the activation conditions 132Hz When are satisfied.
Page 184 AVAILABLE OPTIONAL FUNCTIONS 6.5.11. CANCELLATION OF OUTDOOR 6.5.13. SLOW DEFROST SETTING TEMPERATURE LIMIT OF COOLING By means of this option, you can select the speed of the The cooling process will continue at a low outdoor indoor unit fan during the defrost period. temperature.
Page 185 AVAILABLE OPTIONAL FUNCTIONS Picking Up Operation Signal () 6.5.17. FIXING THE DEMAND FUNCTION With this procedure the operation signal of cooling or heating can be picked up. The method for picking up the This function regulates the running current of the outdoor signal is explained in the figure below.
Page 186 AVAILABLE OPTIONAL FUNCTIONS Picking Up Compressor ON Signal ( ) Picking Up Defrosting Signal () With this procedure the compressor signal can be With this procedure the Defrosting signal can be picked picked up. The method is explained in the figure below. up.
Page 187 AVAILABLE OPTIONAL FUNCTIONS b. Press the "TIME ∇" switch or the "TIME ∆" switch; the b. At the condition of the above item (a), press the "TEMP =" switch or the "TEMP <" switch of the optional function item is changed as shown below. remote control switch and the indoor unit for which the optional function is to be set, can be changed.
Page 188 AVAILABLE OPTIONAL FUNCTIONS Setting items of optional functions Items Optional functions Setting condition Contents Description Removal of heating Not available This function is used to eliminate the 4- temperature calibration Available ºC shift. Circulation function at Not available This function is to avoid the stratification heating Thermo-OFF Available of air.
Page 189 AVAILABLE OPTIONAL FUNCTIONS Items Optional functions Setting condition Contents Description This function retains the settings of the Not available Power supply ON/OFF 1 unit if power supply is interrupted. The Available unit will start when power is restored. Not prepared This function retains the settings of the Not available unit if power supply is interrupted.
Page 190 AVAILABLE OPTIONAL FUNCTIONS 3. Enforced 3 minutes minimum operation time of 6.6.2. OPTIONAL FUNCTIONS OF REMOTE compressor () ) CONTROL SWITCH When a compressor frequently starts and stops in short intervals, this function should be used to guard the compressor. By setting this function, the mode of a 1.
Page 191 AVAILABLE OPTIONAL FUNCTIONS 18. Not prepared 8. Automatic COOL/HEAT operation ()) This function is utilized to operate the unit with changing 19. Not prepared cooling and heating operation automatically. 20. Selection of forced stoppage logic ()) This function is invalid when the outdoor unit is cooling This function is utilized to select the logic of the contact only model or the function of "Fixing Operation as for forced stoppage signal input.
Page 192 AVAILABLE OPTIONAL FUNCTIONS 6.7. OPTIONAL FUNCTIONS AVAILABLE THROUGH THE REMOTE CONTROL SWITCH (PC-P5H) Normal mode (when unit is not operating) Press the › ( ) œ ( ) and ( ) switch Change to the function setting mode simultaneously Press the ›...
Page 193 AVAILABLE OPTIONAL FUNCTIONS 6.8. OPTIONAL FUNCTIONS AVAILABLE THROUGH WIRELESS REMOTE CONTROL SWITCH (PC-LH3A + RECEIVER) PC-RLH9 6.8.1. OPTIONAL FUNCTIONS – Remove two screws Switch (COOL) The following optional functions can be set by the DIP and open the case switches of the receiver part. Switch (HEAT) DIP switch (SW3) PC-RLH8/9/11/13...
Page 195 TEST RUN 7 TEST RUN CONTENTS TEST RUN _______________________________________________________________ 1 7.1. Checking Procedure before the Test Run _______________________________________ 2 7.2. Test Run Procedure by Means of the Remote Control Switch ________________________ 3 7.3. Test Run Procedure by Means of the Wireless Remote Control (PC-LH3A) _____________ 4 7.4.
Page 196 TEST RUN When you have finished the installation, perform the test Ó WARNING: run according to the following procedure. After performing the test run, hand over the system to the customer. – Do not operate the system until all the check points Perform the test run of the indoor units one by one in order.
Page 197 TEST RUN 7.2. TEST RUN PROCEDURE BY MEANS OF THE REMOTE CONTROL SWITCH Turn ON the power source of the indoor units and the outdoor units. — Set the TEST RUN mode by means of the remote control switch. Operation LED Press the MODE switch and the CHECK switch simultaneously for more than three seconds.
Page 198 TEST RUN 7.3. TEST RUN PROCEDURE BY MEANS OF THE WIRELESS REMOTE CONTROL (PC-LH3A) Ó ATTENTION: If the wired remote control switch is used or if multiple units (SET-FREE, DC INVERTER and Utopia Series) are operating simultaneously, you cannot perform the test run by means of the remote control switch.
Page 199 TEST RUN 7) Stop the test run (abnormal) for the PC-RLH 9/11. Example: If you cannot use the PC-LH3A because of battery shortage or any other reason, perform the emergency Alarm operation as follows. code: (1) COOL switch: Press the COOL switch in order to start the cooling process.
Page 200 TEST RUN 7.4. TEST RUN PROCEDURE FROM THE OUTDOOR UNIT SIDE RAS-2~6H(V)RNE Ó WARNING: The procedure of test run from outdoor unit side is Do not touch any other electrical parts when operating indicated below. Setting of this DIP switch is available with switches on the PCB.
Page 201 TEST RUN RAS-2~5HN(V)E Ó WARNING: The procedure of test run from outdoor unit side is – Do not touch any other electrical parts when operating indicated below. Setting of this DIP switch is available with switches on the PCB. the power source ON –...
Page 202 TEST RUN RAS-8~12HRNE Ó WARNING: The test run procedure from the outdoor unit side is shown – Do not touch any other electrical components while below. You can set this DIP switch while the power source you are setting the switches on the PCB. is ON.
Page 203 TEST RUN 7.5. CHECK LIST 7.5.1. RAS-2~6H(V)RNE Heating process You can check the excess or the deficiency of the refrigerant in comparison with the following chart and actual pressure measurement The following checking procedure is useful during test run and maintenance work. Checking procedures Cooling process (MPa)
Page 204 TEST RUN 7.5.2. RAS-2.5~5HNE Check list on test run Client: Installer: Date: Outdoor unit model: Outdoor unit serial No.: Checker: Indoor unit model Indoor unit serial No. Piping length (m) Additional refrigerant charge (kg) 1. General Check item Result Are the power supply wires of the transmission cable making contacts on the piping? Was a ground wire connected? Is there any short circuit? Is there any voltage malfunction among the different phases (L1-L2, L2-L3, L3-L1, L1-N)?
Page 205 TEST RUN 7.6. TEST RUN AND MAINTENANCE RECORD MODEL: SERIAL NO. COMPRESSOR MFG. No. CUSTOMER'S NAME AND ADDRESS: DATE: Is the rotating direction of the indoor coil fan correct? Is the rotating direction of the outdoor coil fan correct? Is there any abnormal compressor sound? Has the unit been operating for at least twenty (20) minutes? Check the room temperature: Inlet:...
Page 207 TROUBLESHOOTING 8 TROUBLESHOOTING CONTENTS TROUBLESHOOTING______________________________________________________ 1 8.1. Initial troubleshooting_______________________________________________________ 2 8.1.1. Checking by means of the 7-segment display ___________________________________ 2 8.1.2. Emergency operation when the inverter compressor is damaged ____________________ 3 8.1.3. Failure of the power supply to the indoor unit and the remote control switch ____________ 4 8.1.4.
Page 208 TROUBLESHOOTING 8.1. INITIAL TROUBLESHOOTING 8.1.1. CHECKING BY MEANS OF THE 7-SEGMENT DISPLAY Simple checking procedure by means of the 7-segment display Turn on all the indoor units All the indoor units which are connected to the outdoor unit. Turn on the outdoor unit Turn auto-addressing starts During the auto-addressing, you can check the following items by means of the 7-segment display of the outdoor unit.
Page 209 TROUBLESHOOTING 8.1.2. EMERGENCY OPERATION WHEN THE INVERTER COMPRESSOR IS DAMAGED Failure of the inverter compressor d. Emergency operation a. Contents of the operation (applicable to the models 1. Turn OFF all the main switches. RAS-8~12HRNE) 2. Disconnect the wiring from the inverter compressor. 1.
Page 210 TROUBLESHOOTING 8.1.3. FAILURE OF THE POWER SUPPLY TO THE INDOOR UNIT AND THE REMOTE CONTROL SWITCH The LED and the LCD are not indicated. Not operated If the fuses are blown out or a breaker is activated, investigate the cause of the overcurrent and take the necessary action.
Page 211 TROUBLESHOOTING 8.1.4. ABNORMAL TRANSMISSION BETWEEN THE REMOTE CONTROL SWITCH AND THE INDOOR UNIT RUN LED on the remote control switch: Flickering every 2 seconds. Action Phenomenon Cause Check item (Turn OFF the main switch) Disconnection or insufficient contacting Check the cable and the Repair the cable or connect of the remote control cable connections...
Page 212 TROUBLESHOOTING 8.1.5. ABNORMAL OPERATION OF THE DEVICES Action Phenomenon Cause Check item (Turn OFF the main switch) Disconnected Measure the coil resistance Failure of coil by means of the tester the indoor Replace the Indoor unit fan unit fan motor motor Measure the insulation Burnt-out coil...
Page 213 TROUBLESHOOTING ABNORMAL OPERATIONS OF THE DEVICES (Cont.) Action Phenomenon Cause Check item (Turn OFF the main switch) Check the setting condition of "remote control thermostat" by means of the optional setting Setting and control: "00": Control by means of the indoor thermistor for the suction air The Comp.
Page 214 TROUBLESHOOTING ABNORMAL OPERATIONS OF DEVICES (Cont.) Action Phenomenon Cause Check item (Turn OFF the main switch) Failure of the Failure of Thermistor Check the Thermistor by Replace or Correctly Discharge means of the connect the wiring when Air Temp. Disconnected self-check mode *2) it is abnormal Thermistor...
Page 215 TROUBLESHOOTING ABNORMAL OPERATIONS OF THE DEVICES (Cont.) Action Phenomenon Cause Check item (Turn OFF the main switch) Indoor cool load is greater than Calculate the cool load Use a bigger unit the cooling capacity Gas leakage Correctly charge the or shortage of Measure superheat refrigerant after repairing refrigerant...
Page 216 TROUBLESHOOTING ABNORMAL OPERATIONS OF THE DEVICES (Cont.) Action Phenomenon Cause Check item (Turn OFF the main switch) Clogging of the outdoor unit Remove the clogging heat exchanger? Obstacles at the inlet or the Insufficient outlet of the outdoor unit Remove the obstacles air flow to the heat exchanger outdoor unit...
Page 217 TROUBLESHOOTING ABNORMAL OPERATIONS OF THE DEVICES (Cont.) Action Phenomenon Cause Check item (Turn OFF the main switch) Indoor heat load is greater than Replace the unit with Calculate the heat load the heating capacity a bigger unit Gas leakage Correctly charge the or insufficient Measure superheat refrigerant after the gas...
Page 218 TROUBLESHOOTING ABNORMAL OPERATIONS OF THE DEVICES (Cont.) Action Phenomenon Cause Check item (Turn OFF the main switch) Check the filter for a Remove the clogging clogging Insufficient air flow to Check for any obstacles at the indoor the inlet or the outlet of the Remove the obstacles unit heat indoor unit...
Page 219 TROUBLESHOOTING ABNORMAL OPERATIONS OF THE DEVICES (Cont.) Action Phenomenon Cause Check item (Turn OFF the main switch) Foreign particles inside of the Remove the foreign Visually inspect it fan casing particles Indoor unit fan runner is hitting Adjust the position of the fan Visually inspect it the casing runner...
Page 220 TROUBLESHOOTING 8.2. TROUBLESHOOTING PROCEDURE 8.2.1. ALARM CODE TABLE If the RUN LED flickers for 2 seconds, there is a failure in If the RUN LED flickers 5 times (5 seconds) with the unit number the transmission between the Indoor Unit and the Remote and the alarm code displayed, make a note of the alarm code Control Switch.
Page 221 TROUBLESHOOTING Availability Code Category Content of Abnormality Leading Cause O O O Incorrect Setting of Outdoor and Indoor Unit Incorrect Setting of Capacity Code. Failure of Power Supply, PCB in other O O X Abnormal Transmission of Other Indoor Unit Indoor Unit.
Page 222 TROUBLESHOOTING Only for RAS-2.5~5HN(V)E series At the same time than alarm code is indicated and RUN lamp flashes, the LEDs 1 to 4 of the outdoor unit shown in chapter 5, are flickering 0.5 seconds ON / 0.5 seconds OFF, depending of the alarm code indicated below. Alarm Code Normal ,...
Page 223 TROUBLESHOOTING 8.2.2. TROUBLESHOOTING BY ALARM CODE Alarm code Activation of the safety device in the indoor unit The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 224 TROUBLESHOOTING Alarm code Activation of the safety device in the outdoor unit The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 225 TROUBLESHOOTING Action Phenomenon Cause Check item (Turn OFF the main switch) Check the heat exchanger Remove the dust or the for dust or for clogging clogging Check the air filter for dust Remove the dust Insufficient Air Flow to the Heat Exchanger (Outdoor Heat Check for any obstacles at Exchanger during the Cooling...
Page 226 TROUBLESHOOTING Action Phenomenon Cause Check item (Turn OFF the main switch) Check for clogging Remove the clogging Check the connect wiring Replace the connector and the connectors Faulty or malfunction of the Check the operation sound Replace the coil expansion valve from the coil Check the discharge gas Replace the thermistor...
Page 227 TROUBLESHOOTING Alarm code Abnormal transmission between the indoor units and the outdoor unit The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 228 TROUBLESHOOTING H(V)RNE / HN(V)E: Is DSW5-1P (terminal resistance) on PCB1 ON? Set it correctly HRNE: Is DSW10-1P (terminal resistance) on PCB1 ON? Is the voltage between Is LED1 (red) on the fasten terminal "R1" Check the fuses of the PCB1 ON? and "N"...
Page 229 TROUBLESHOOTING Action Phenomenon Cause Check item (Turn OFF the main switch) Measure the voltage by Power failure or no power supply Supply the power means of the tester Check the insulation Remove the short circuit Short circuit between wires material for breaks and replace the fuse Blown out fuse Measure the insulation...
Page 230 TROUBLESHOOTING Alarm code Abnormal transmission between the inverter and the outdoor PCB1 and ISPM The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
Page 231 TROUBLESHOOTING Action Phenomenon Cause Check item (Turn OFF the main switch) Between control PCB, ISPM Disconnected Check the continuity of and FANM wires, insufficient Replacing wires, repairing, wires. Check for looseness contacting or tightening screws and of the connection screws. incorrect incorrect wiring Power source wiring for the...
Page 232 TROUBLESHOOTING Alarm code Code abnormal operation of picking up phase signal The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 233 TROUBLESHOOTING Alarm code Excessively low voltage or excessively high voltage for the inverter The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 234 TROUBLESHOOTING Alarm code Excessively low or excessively high voltage for inverter fan module The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 235 TROUBLESHOOTING Alarm code Decrease of the discharge gas superheat - RAS-2~6H(V)RNE The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 236 TROUBLESHOOTING Action Phenomenon Cause Check item (Turn OFF the main switch) Ref. cycle is different from the Check the ref. cycle and the Repair the wiring electrical system electrical system Measure the pressure. Correctly charge the Overcharged refrigerant (Refer to 7.5) refrigerant Replace the ex.
Page 237 TROUBLESHOOTING Alarm code Decrease of the discharge gas superheat - RAS-8~12HRNE The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 238 TROUBLESHOOTING Action Phenomenon Cause Check item (Turn OFF the main switch) Ref. cycle is different from the Check the ref. cycle and the Repair the wiring electrical system electrical system Measure the pressure. Correctly charge the Overcharged refrigerant (Refer to Figure refrigerant in "Test Run of SM".) Replace the ex.
Page 239 TROUBLESHOOTING Alarm code Decrease in discharge gas superheat - (HN(V)E only) The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section and LED flashes on the display of the Outdoor Unit PCB.
Page 240 TROUBLESHOOTING Alarm code Excessively high discharge gas temperature at the top of the compressor chamber The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 241 TROUBLESHOOTING Action (Turn OFF the main Phenomenon Cause Check item switch) Ref. cycle is different from Check the ref. cycle and the Repair the wiring the electrical system electrical system Shortage of refrigerant Check the pressures Correctly charge refrigerant Replace the ex. valve if Faulty Ex.
Page 242 TROUBLESHOOTING Alarm code Activation of the protection device for the outdoor fan motor for HRNE The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 243 TROUBLESHOOTING Alarm code Abnormal operation of thermistor for the indoor unit air inlet temperature (air inlet thermistor) The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 244 TROUBLESHOOTING Alarm code Abnormal operation of the thermistor for the indoor discharge air temperature (air outlet thermistor) The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 245 TROUBLESHOOTING Alarm code Abnormal operation of the thermistor for the indoor unit heat exchanger liquid pipe temperature (freeze protection thermistor) The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 246 TROUBLESHOOTING Alarm code Abnormal operation of the thermistor for the indoor unit heat exchanger gas pipe temperature (gas piping thermistor) The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 247 TROUBLESHOOTING Alarm code Activation of the protection device for the indoor fan motor (except RCI and RPK) The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 248 TROUBLESHOOTING Alarm code Activation of protection device for indoor fan motor (RCI-Model) The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. and the alarm code is indicated on the display of the outdoor unit PCB.
Page 249 TROUBLESHOOTING Alarm code Activation of protection device for indoor fan motor (RPK-Model) The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 250 TROUBLESHOOTING Alarm code Abnormality of Thermistor for Discharge Gas Temperature (Compressor Thermistor) The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are indicated on the display of the outdoor unit PCB.
Page 251 TROUBLESHOOTING Alarm code Abnormal operation of the high-pressure sensor for the outdoor unit The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 252 TROUBLESHOOTING Alarm code Abnormal operation of the thermistor for the outdoor temperature (outdoor unit ambient thermistor) The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 253 TROUBLESHOOTING Alarm code Abnormal operation of thermistor for discharge gas temperature on the top of compressor chamber The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 254 TROUBLESHOOTING Alarm code Abnormal operation of the thermistor for the evaporating temperature during the heating process (outdoor unit) The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 255 TROUBLESHOOTING Alarm code Incorrect capacity setting or combined capacity between the indoor units and the outdoor unit The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 256 TROUBLESHOOTING Alarm code Abnormal operation in the transmission of other indoor units The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 257 TROUBLESHOOTING Alarm code Incorrect indoor unit number setting The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB. This alarm code is displayed five minutes after the power is supplied to the outdoor unit when the indoor unit number which is connected to the outdoor unit is duplicated by the setting of the RSW.
Page 258 TROUBLESHOOTING Alarm code Abnormal operation of picking up the circuit for the protection (outdoor unit) The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 259 TROUBLESHOOTING Alarm code Abnormal operation of the running current at the constant speed compressor The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 260 TROUBLESHOOTING Action Phenomenon Cause Check item (Turn OFF the main switch) Operate within Excessively high voltage or 380V±10%(50Hz) or low voltage of the power 415V±10%(50Hz), source 240V±10%(50Hz) or 220V±10%(50Hz), Excessively large running current of the compressor motor Imbalance among phases at Adjust the voltage between the power source each phase...
Page 261 TROUBLESHOOTING Alarm code Cooling overload (High pressure switch will be activated) The RUN LED flickers and "ALARM" code displayed flickers (1 time / 1 second). This alarm code is indicated when outdoor pipe temperature (THM8) is higher than 55 °C and top compressor temperature (THM9) is higher than 95 °C.
Page 262 TROUBLESHOOTING Alarm code Heating overload (High pressure switch will be activated) The RUN LED flickers and "ALARM" code displayed flickers (1 time / 1 second). This alarm code is indicated when indoor pipe temperature (THM5) is higher than 55 °C and top compressor temperature (THM9) is higher than 95 °C.
Page 263 TROUBLESHOOTING Alarm code Activation for protecting the system from the low compression ratio The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section, The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 264 TROUBLESHOOTING Alarm code Activation for protecting the system from excessively high suction pressure The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 265 TROUBLESHOOTING Alarm code Activation for protecting the system from excessively high discharge pressure The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 266 TROUBLESHOOTING Alarm code Activation for protecting the system from excessively low suction pressure (protection from the vacuum operation for RAS-2~6H(V)RNE / RAS-2.5~5HN(V)E) The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 267 TROUBLESHOOTING Alarm code Activation for protecting the system from excessively low suction pressure (protection from the vacuum operation for RAS-8~12HRNE) The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 268 TROUBLESHOOTING Alarm code Abnormal operation of the current transformer (0A detection) The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 269 TROUBLESHOOTING Alarm code Activation for protecting the inverter against the instantaneous overcurrent (1) The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 270 TROUBLESHOOTING Alarm code Activation for protecting the inverter against the instantaneous overcurrent (2) The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 271 TROUBLESHOOTING Alarm code Activation for protecting the ISPM The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB. ISPM has a detection function of the abnormal operation.
Page 272 TROUBLESHOOTING Alarm code Increase in the inverter fan temperature The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 273 TROUBLESHOOTING Alarm code Abnormal operation of fan motor protection The RUN LED flickers and "ALARM" is displayed on the remote control switch. The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
Page 274 TROUBLESHOOTING Alarm code Compressor protection This alarm code is displayed when one of the following alarms occurs three times within six hours. If the outdoor unit operates continuously without removing the cause of the alarm, the compressor may be seriously damaged. Alarm code: Content of abnormal operation Tripping of the protection device in the outdoor unit...
Page 275 TROUBLESHOOTING 8.2.3. TROUBLESHOOTING IN CHECK MODE Use the CHECK switch of the remote control in the following cases: 1. When the RUN LED is flickering. 2. To trace back the cause of the malfunction after restarting from the stoppage while the RUN LED is flickering.
Page 276 TROUBLESHOOTING Although the wireless controller is used for the wall type NOTE: indoor unit with the built-in receiver part, you can check the 1. The unit does not operate by pressing the operation alarm code by connecting the PC-P1HE. switch. Suction grille 2.
Page 277 TROUBLESHOOTING Heating Thermo-ON Alarm )) Thermo temp. of the Coding Thermo-ON Operation remote control switch PCB relay ↓ Part name Dark RAS-8~12 RAS-3~6 HRNE H(V)RNE Indication on micro-computer input /output Relay for drain pump (MD) and/or Y52H dew heater (EHW) Y52H Relay for electric heater (CEH) Y211...
Page 278 TROUBLESHOOTING Compressor pressure/frequency indication (1) For HN(V)E series, not used " " Discharge pressure (3) For 2~6HRN(V)E series, not used () (high) (x 0.1 MPa) ↓ Suction pressure (low) (x 0.01 MPa) ↓ This is an indication for internal information for the remote Control information control switch.
Page 279 TROUBLESHOOTING Contents of the Check mode 2 When more than three indoor units are connected to one remote control switch, the latest data of only the first three indoor units that are connected serially are displayed. < If you press the part " "...
Page 280 TROUBLESHOOTING Compressor pressure/frequency indication (1) For HN(V)E series: Discharge pressure for "" to "" , " " is displayed (high) (x 0.1 MPa) ↓ Suction pressure (low) (x 0.01 MPa) ↓ ) This is an indication for the internal information for the remote Control information control switch.
Page 281 TROUBLESHOOTING 8.2.4. TROUBLESHOOTING BY MEANS OF THE 7-SEGMENT DISPLAY For RAS-2~6H(V)RNE Simple checking by 7-segment display Turn on All Indoor Units All the Indoor Units Connected to the Outdoor Unit ↓ Turn on All Outdoor Units ↓ Auto--addressing starts During auto-addressing, the following items can be checked using the outdoor unit's on-board 7-segment LED display.
Page 282 TROUBLESHOOTING from previous page ↓ Checking item PSW3 PSW2 Checking contents Request Frequency from Indoor Unit PSW2 PSW3 25 to 115 (Hz) (In case that frequency is higher than 100Hz, two digits flicker.) PSW3 PSW2 Outdoor Air Flow Ratio 00 to 100 (%) PSW2 PSW3 (In case that air flow ratio is higher...
Page 283 TROUBLESHOOTING From previous page ↓ Checking item PSW3 PSW2 Indoor Unit Discharge Air Temperature PSW2 PSW3 -19 to 127 (ºC) PSW3 PSW2 19 Indoor unit Cause of Stoppage PSW2 PSW3 Refer to the Table on page 8/70 Return to START "$" NOTE: The protection control code being indicated on 7-segment display is changed to an alarm code when...
Page 284 TROUBLESHOOTING For RAS-8~12HRNE Checking method by means of the 7-segment display By means of the 7-segment display and the check switch (PSW) on the PCB1 in the outdoor unit, you can check the total quantity of the combined indoor units, the 7-segment display operation conditions and each part of the refrigerant cycle. To start checking, press the PSW2 switch for more than three seconds.
Page 285 TROUBLESHOOTING from previous page ↓ Checking item Checking contents PSW3 PSW2 PSW2 PSW3 PSW3 PSW2 3 ) Outdoor expansion valve MVB opening PSW2 PSW3 PSW3 PSW2 Discharge pressure (high) PSW2 PSW3 (MPa) PSW3 PSW2 11 Suction pressure (low) ...
Page 286 TROUBLESHOOTING from previous page ↓ Checking item Checking contents PSW3 PSW2 = Open Circuited , = Short - circuited Í 3 21 Air temperature (TO) PSW2 PSW3 (°C) PSW3 PSW2 Í 22 RESERVE PSW2 PSW3 PSW3 PSW2 Indicates running current of primary side of inverter Estimated running...
Page 287 TROUBLESHOOTING from previous page ↓ Checking item Checking contents PSW3 PSW2 Í (No, 0 Unit) No. 0 Unit) PSW2 PSW3 (°C) Indoor unit ∼ heat exchanger gas pipe temp. PSW3 PSW2 Í (No. F Unit) No. F Unit) Note 1 PSW2 PSW3 (°C)
Page 288 TROUBLESHOOTING from previous page ↓ Checking item Checking contents PSW3 PSW2 High-pressure increase * protection restricted : Restricted control is not in operation PSW2 PSW3 control : Restricted control is in operation PSW3 PSW2 Inverter final temperature * increase protection : Restricted control is not in operation PSW2...
Page 289 TROUBLESHOOTING from previous page ↓ Checking item Checking contents PSW3 PSW2 Refer to page 17/14 for code indication Ö Í Cause code of stoppage at inverter PSW2 PSW3 PSW3 PSW2 Í Cause code of stoppage at fan motor controller PSW2 PSW3 PSW3...
Page 290 TROUBLESHOOTING 8.2.5. RUNNING CURRENT OF THE COMPRESSOR Inverter primary current The inverter primary current is estimated from the running current of the compressor displayed on the 7-segment display, as shown on the right chart. Upper limit Displayed running current of the compressor MC2 is detected by the current sensor CT2.
Page 291 TROUBLESHOOTING 8.2.6. PROTECTION CONTROL CODE ON THE 7-SEGMENT DISPLAY RAS-2~6H(V)RNE 1. The protection control indication can be seen on 7- segment when a protection control is activated. Code Protection Control 2. The 7-segment continues ON while function is working, Low Pressure Ratio Control and goes out when released.
Page 292 TROUBLESHOOTING RAS-8~12HRNE 1. When a protection control is activated, you can see the Code Protection control protection control indication on the 7-segment display. Pressure ratio control (*) 2. The 7-segment display remains ON while the function is working. The 7-segment display turns off when the High-pressure rise protection (*) function is disabled.
Page 293 TROUBLESHOOTING 8.2.7. ACTIVATING CONDITION OF THE PROTECTION CONTROL CODE To monitor the conditions such as the temperature change The activating conditions of the protection control are shown and others, the control of the frequency and other controls in the table below. are performed by the protection control in order to prevent the abnormal operations.
Page 294 TROUBLESHOOTING Code Protection control Activating condition Remarks Demand setting value: Upper limit of the Compressor run current ≥ Demand setting value → compressor total current can be set by Demand current control external input (80%, 70%, 60% at normal Frequency decrease situation) When it activates three times in 30 Pressure ratio falling retry...
Page 295 TROUBLESHOOTING 8.3. PROCEDURE FOR CHECKING EACH MAIN PART 8.3.1. SELF-CHECKING PROCEDURE OF PCB BY MEANS OF THE REMOTE CONTROL SWITCH Use the following troubleshooting procedure for testing the PCB in the indoor unit and the outdoor unit RUN/STOP Stop operation Press TEMP Press both switches...
Page 296 TROUBLESHOOTING If you are using a wireless remote control switch with the built-in receiver part of the wall-type indoor unit and you need to perform the above checking, perform the following procedure: 1. Turn OFF the power supply. 2. Disconnect the connector (CN25) on PWB(M). 3.
Page 297 TROUBLESHOOTING 8.3.2. SELF-CHECKING PROCEDURE OF THE REMOTE CONTROL SWITCH Cases where the CHECK switch is used. 1. If the remote control switch displays a malfunction. Indicating 2. For the regular maintenance check. LCD indication period (sec.) Turn ON the power source Only for the For one ↓...
Page 298 TROUBLESHOOTING ↓ The LCD changes as shown below. The detected temperature of the remote control thermostat is displayed at the (A) part in the figure below. → If the indicators " " or "" are displayed at the "A" part, the remote control thermostat is abnormal.
Page 299 TROUBLESHOOTING 8.3.3. SELF-CHECKING PROCEDURE OF THE INDOOR UNIT PCB (ONLY FOR RPK) Self-checking procedure by means of the relays Procedure on the indoor unit PCB Turn OFF the main power switch. Disconnect the connectors CN7 and CN8. Set the To check the abnormal operation on the indoor unit PCB DIP switch DSW2 as shown below.
Page 300 TROUBLESHOOTING 8.3.4. PROCEDURE FOR CHECKING OTHER MAIN PARTS High-voltage discharge procedure for replacing the parts Ô DANGER: Perform this high-voltage discharge procedure in order to avoid an electrical shock. Procedure: a. Turn OFF the main switches and wait for three minutes. Connect the wires to terminals, P and N on ISPM.
Page 301 TROUBLESHOOTING Checking procedure ISPM for RAS-2~6HVRNE Rectification Parts of Internal Circuit of ISPM (Common) Remove all the terminals of the ISPM before check. If items (a) to (h) are performed and the results are satisfactory, ISPM is normal. Measure it under 1 kΩ range of a tester.
Page 302 TROUBLESHOOTING Active Parts of Internal Circuit of ISPM If item (i) to (m) are performed and the results are satisfactory, ISPM is normal. Measure it under 1 kΩ range of a tester. Do not use a digital tester. i. Perform the item (a) to (h). j.
Page 303 TROUBLESHOOTING Checking procedure ISPM for RAS-4~12HRNE Rectification Parts of Internal Circuit of ISPM (Common) Remove all the terminals of the ISPM before check. If items (a) to (h) are performed and the results are satisfactory, ISPM is normal. Measure it under 1 kΩ range of a tester.
Page 304 TROUBLESHOOTING Active Parts of Internal Circuit of ISPM If item (i) to (m) are performed and the results are satisfactory, ISPM is normal. Measure it under 1 kΩ range of a tester. Do not use a digital tester. i. Perform the item (a) to (h). j.
Page 305 TROUBLESHOOTING Checking procedure for the fan controller failure 1) Turn OFF the main switches and make sure that LED201 (Red) on Fan Controller is OFF. Otherwise, an electrical shock may occur because the voltage may have changed more than DC50V in Fan Controller. 2) Remove all the wirings in Fan Controller and measure the resistance between the terminals by means of an analog tester, according to the table below.
Page 306 TROUBLESHOOTING /100 Checking procedure for the electrical coil parts Abbreviations used for colors Black Brown Yellow Green Blue Grey Orange White Part names Model Electrical wiring diagram Wiring No. Resistance (Ω) Fan motor for the indoor unit for: RCI-1.5FSN1E DC Motor RCI-2.0FSN1E RCI-2.5FSN1E RCI-3.0FSN1E...
Page 307 TROUBLESHOOTING /101 Part names Model Electrical wiring diagram Wiring No. Resistance (Ω) - RED 32.10 - YEL 24.50 - GRY 24.50 - WHT 44.70 Fan motor for the indoor unit for: at 25 °C RPC-4.0FSNE 180W RPC-5.0FSNE RPC-6.0FSNE - RED 119.70 - BLU 87.98...
Page 308 TROUBLESHOOTING /102 Part names Model Electrical wiring diagram Wiring No. Resistance (Ω) Fan motor for the indoor unit for: RPK-1.5FSNM RPK-1.5FSN1M RPK-2.0FSNM Fan motor for the indoor DC Motor unit for: RPK-2.5FSNM RPK-3.0FSNM Fan motor for the indoor unit for: RPK-3.5FSNM RPK-4.0FSNM - RED...
Page 309 TROUBLESHOOTING /103 Part names Model Electrical wiring diagram Wiring No. Resistance (Ω) Fan motor for the outdoor - BLU 3,25 unit for: DC Motor - ORN 3,25 RAS-8HRNE 810W - YEL 3,25 RAS-10/12HRNE Fan motor for the outdoor DC Motor unit for: DC Motor RAS-2~5HVRNE...
Page 310 TROUBLESHOOTING /104 Checking procedure for the compressor CHECK LIST ON THE COMPRESSOR Client: Model: Date: Serial No: Production date: Checker: Check item Check method Result Remarks Are THM8 and THM9, correctly Are the wires of each thermistor correctly connected? connected in a visual inspection? THM8, THM9: Make sure that 7-segment display of Td1 is Discharge gas thermistor...
Page 311 TROUBLESHOOTING /105 Additional information for "CHECK LIST ON THE COMPRESSOR" Check item Additional information (mechanism of the compressor failure) 1 & 2 The discharge gas temperature (Td1) controls the liquid refrigerant return volume to the compressor when only the compressor No.1 is operating. If THM8 and THM9 are connected in the reverse order, the liquid refrigerant return volume will decrease even if the actual discharge gas temperature is high, because PCB1 is checking the wrong compressor temperature.
Page 313 ELECTRICAL WIRING DIAGRAMS 9 ELECTRICAL WIRING DIAGRAMS This chapter shows the Electrical Wiring Diagram for each unit of the new Hitachi H(V)RNE/HNE Series. CONTENTS ELECTRICAL WIRING DIAGRAMS ____________________________________________ 1 Electrical Wiring Diagram For Models: RCI-1.5~6.0FSN1E __________________________________2 Electrical Wiring Diagram For Models: RCIM-1.5/2FSN1E ___________________________________3 Electrical Wiring Diagram For Models: RCD-1.5~3.0FSN ____________________________________4...
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Page 335 SERVICING 10 SERVICING CONTENTS SERVICING ______________________________________________________________ 1 10.1. Outdoor Unit RAS-2~6H(V)RNE_______________________________________________ 4 10.1.1. Removing service cover _____________________________________________________4 10.1.2. Removing air outlet grille ____________________________________________________4 10.1.3. Removing outdoor fan ______________________________________________________4 10.1.4. Removing outdoor fan motor _________________________________________________5 10.1.5. Removing the compressor ___________________________________________________5 10.1.6. Removing high pressure switch and pressure switch for control ______________________8 10.1.7.
Page 336 SERVICING 10.5. RCIM – FSN _____________________________________________________________ 48 10.5.1. Removing the air filter______________________________________________________48 10.5.2. Removing the air intake grille ________________________________________________48 10.5.3. Removing the electrical box cover ____________________________________________48 10.5.4. Removing the optional air panel ______________________________________________49 10.5.5. Removing the fan runner and fan motor________________________________________50 10.5.6.
Page 337 SERVICING 10.11. RPK 1.5FSN1M __________________________________________________________ 90 10.11.1. Removing the Air Filter _____________________________________________________90 10.11.2. Removing front panel ______________________________________________________91 10.11.3. Removing the Electrical Box Panel ___________________________________________92 10.11.4. Removing the Motor for the Automatic Louver ___________________________________92 10.11.5. Removing the Thermistors for Liquid Pipe, Gas Pipe, Discharge air and Suction Air _____93 10.11.6.
Page 338 SERVICING Ó WARNING: TURN OFF all the main switches 10.1. OUTDOOR UNIT RAS-2~6H(V)RNE 10.1.1. REMOVING SERVICE COVER 1. Remove the main parts according to the following procedures. To reassemble perform the procedures in reverse order. 2. To prevent contamination of the refrigerant with water or foreign particles, do not expose open to atmosphere for long periods.
Page 339 SERVICING Ó WARNING: TURN OFF all the main switches 10.1.4. REMOVING OUTDOOR FAN MOTOR 1. Disconnect the connectors for the motors in the electrical box. (2) Cut the plastic tie of the motor clamp by using nipper. (3) Remove the four (4) fixing screws for the motor. NOTES: 1.
Page 340 SERVICING Ó WARNING: TURN OFF all the main switches For RAS-3~6H(V)RNE Terminal Box Cover 5. Remove the terminal panel for the compressor and disconnect the wiring to the compressor terminals. Make sure that the terminal numbers and the mark band are correct.
Page 341 SERVICING Ó WARNING: TURN OFF all the main switches For RAS-2~3HVRNE Foot Position 11. Remove the nut that fix the compressor and remove the compressor. There is no nut at the rear side. When you are removing the compressor, pay special attention 0 = Exits not to touch or deform the surrounding pipes.
Page 342 SERVICING Ó WARNING: TURN OFF all the main switches 10.1.6. REMOVING HIGH PRESSURE SWITCH AND PRESSURE SWITCH FOR CONTROL Upper Cover 1. Remove the service cover according to the item “Removing Service Cover”. Screw 2. Remove the nine (9) M5 screws fixing the rear cover and (M5, Qty.9) the five (5) M5 screws fixing the pipe rear cover.
Page 343 SERVICING Ó WARNING: TURN OFF all the main switches RAS-2~3HVRNE 10.1.7. REMOVING COIL FOR REVERSING VALVE Ô DANGER: Do not touch the electrical parts when LED201 (Red) on Reversing Valve the ISPM is lit to prevent from an electrical shock. 1.
Page 344 SERVICING Ó WARNING: TURN OFF all the main switches 10.1.8. REMOVING COIL FOR EXPANSION VALVE Ô DANGER: Pull out the Do not touch the electrical parts when LED201 (Red) on expansion valve coil upwards the ISPM is lit to prevent from an electrical shock. Expansion valve coil 1.
Page 345 SERVICING Ó WARNING: TURN OFF all the main switches 10.1.10. REMOVING ISPM RAS-2~3HVRNE Ô DANGER: Do not touch the electrical parts when LED201 (Red) on the ISPM is lit to prevent from an electrical shock. 1. Remove the service cover according to the item “Removing Service Cover”.
Page 346 SERVICING Ó WARNING: TURN OFF all the main switches RAS-4~6HVRNE Ô DANGER: Do not touch the electrical parts when LED201 (Red) on the ISPM is lit to prevent from an electrical shock. 1. Remove the service cover according to the item “Removing Service Cover”.
Page 347 SERVICING Ó WARNING: TURN OFF all the main switches 10.1.11. REMOVING ELECTRICAL COMPONENTS Ô RAS-2~3HVRNE DANGER: ISPM Do not touch the electrical parts when LED201 (Red) on the ISPM is lit to prevent from an electrical shock. LED201 (Red) 1. Remove the service cover according to the item “Removing Service Cover”.
Page 348 SERVICING Ó WARNING: TURN OFF all the main switches RAS-4~6HRNE Magnetic contactor Side A Side B ISPM LED201 (red) Magnetic contactor Capacitor Reactor 10.2. OUTDOOR UNIT RAS-8/10/12HRNE 10.2.1. REMOVING THE AIR INLET GRILLE 1. Remove the two/the four screws at the bottom of the air inlet grille (rear side of the unit).
Page 349 SERVICING Ó WARNING: TURN OFF all the main switches 10.2.2. REMOVING THE FRONT SERVICE PANEL 1. Remove the 8 screws. Slightly lift the panels upwards and remove the panels. Side Cover Side Cover NOTES: Service Panel 1) When you are removing screws for the front service Service Panel access panel, remove the screw at the lower part of Square Hole...
Page 350 SERVICING Ó WARNING: TURN OFF all the main switches 10.2.4. REMOVING THE OUTDOOR FAN 1. Remove the fan guard nets according to the section "Removing the Fan Guard Nets". NOTE: Flat Washer Flat Washer Do not apply load on the upper panel (plastic part). Propeller Fan Otherwise, you may deform or break the upper panel.
Page 351 SERVICING Ó WARNING: TURN OFF all the main switches 10.2.5. POSITION FOR ATTACHING THE AC MOTOR When you are attaching the AC motor (*), attach the motor by positioning the motor toward front side. Otherwise, the gap between the propeller fan and the bell mouth will not be enough.
Page 352 SERVICING Ó WARNING: TURN OFF all the main switches 4. Release the lace for the waterproof panel. Open the Direction to remove the cover Direction to remove the cover waterproof panel from the front side. NOTE: Water-Proof Cover Water-Proof Cover Remove the waterproof panel in the arrow mark direction as shown.
Page 353 SERVICING Ó WARNING: TURN OFF all the main switches 7. Disconnect the discharge and suction pipes of the compressor. Make sure that there is no positive pressure inside the pipes. Cut the pipe at the compressor side of the brazing part. Remove the cut pipe of the compressor. Remove it by using Remove it by using burner after cutting...
Page 354 SERVICING Ó WARNING: TURN OFF all the main switches 9. Remove the three nuts that fix the compressor and Plane View Plane View remove the compressor. There is no nut at the rear side. Foot of Foot of When you are removing the compressor, pay special Without nut Without nut Compressor...
Page 355 SERVICING Ó WARNING: TURN OFF all the main switches 11. Attach the new compressor. Perform the brazing according to the following order: 1) Oil Evacuating Pipe (in the case of the constant speed compressor). 2) Discharge Pipe. 3) Suction Pipe. Pay special attention to the oil pipe: do not to deform the oil pipe when you are attaching the nuts on the front side.
Page 356 SERVICING Ó WARNING: TURN OFF all the main switches 10.2.7. REMOVING THE HIGH PRESSURE SWITCH, THE HIGH PRESSURE SENSOR AND THE LOW PRESSURE SENSOR 1. Remove the front service access panel according to the RAS - 8 ~ 10 FSN RAS - 8 ~ 12 HRNE section "Removing the Front Service Panel".
Page 357 SERVICING Ó WARNING: TURN OFF all the main switches 10.2.9. REMOVING THE HIGH PRESSURE SENSOR AND THE LOW PRESSURE SENSOR (DETAILED PROCEDURE) Tension of wire after attaching shall be 1. Remove the connector for the pressure sensor wiring at the .Tension of wire within 3 winds after attaching shall be...
Page 358 SERVICING Ó WARNING: TURN OFF all the main switches 10.2.11. REMOVING THE SOLENOID VALVE COIL 1. Remove the front service access panel according to the Screw section "Removing the Front Service Panel". Solenoid Screw Solenoid 2. Remove the fixing screw (1 piece) for the solenoid valve coil.
Page 359 SERVICING Ó WARNING: TURN OFF all the main switches 10.2.12. REMOVING THE EXPANSION VALVE COIL Coil Coil Coil 1. Before this work, remove the service access panel Coil according to the section 10.2.2, "Removing the Front Turn the coil and Turn the coil and Service Panel".
Page 360 SERVICING Ó WARNING: TURN OFF all the main switches 10.2.13. REMOVING THE THERMISTOR FOR THE LIQUID PIPE Thermistor Thermistor Thermistor Thermistor NOTE: Holder Holder When you are removing the thermistor for the liquid pipe, make sure that you do not remove the valve when you are pulling the cable.
Page 361 SERVICING Ó WARNING: TURN OFF all the main switches 10.2.14. REMOVING THE OUTDOOR THERMISTOR RAS - 10 FSN 1. Remove the front service access panel according to the RAS-8~12HRNE section "Removing the Front Service Panel" 2. Remove the two screws for the electrical box panel and Screw (Upper) Screw (Upper) remove the electrical box panel.
Page 362 SERVICING Ó WARNING: TURN OFF all the main switches NOTES: Check to ensure that Check to ensure that the bottom edge of the bottom edge of Refer to the diagram and pay special attention to the bellmonth is on the bellmonth is on the front cover upper 2 front cover upper 2...
Page 363 SERVICING Ó WARNING: TURN OFF all the main switches 10.2.15. REMOVING THE 4- WAY VALVE Terminal Board Power Source Before starting the work, collect the refrigerant into a cylinder Terminal Board Power Source for control circuit Terminal Board for control circuit Terminal Board from the cycle and turn off all the main switches.
Page 364 SERVICING Ó WARNING: TURN OFF all the main switches 10.2.16. REMOVING THE STOP VALVE HRNE This procedure is an example for the RAS-10HRNE. A similar procedure can be applied to other models. Before starting the work, collect the refrigerant into a cylinder from the cycle and turn off all the main switches.
Page 365 SERVICING Ó WARNING: TURN OFF all the main switches Removing the electrical components 10.2.17. REMOVING THE ELECTRICAL BOX Before this work, remove the service access panel according to the section "Removing the Front Service Panel". Electrical Box Electrical Box a) Loosen the two screws that fix the electrical box cover. Make sure that the electrical box cover does not fall off.
Page 366 SERVICING Ó WARNING: TURN OFF all the main switches 10.2.18. REMOVING THE PCB (ELECTRICAL BOX FOR CONTROL) PCB Mounting plate Before this work, remove the right-side front panel according to the section "Removing the Front Service Panel". – Disconnect the connectors that are connected to the PCB and clamp the middle portion of the holder A by means of pinchers and pull out the PCB.
Page 367 SERVICING Ó WARNING: TURN OFF all the main switches 10.2.20. REMOVING THE NOISE FILTER 1) Remove the field wiring on the terminal board for the transmission (TB2) and the terminal board for the power source (TB1). 2) Remove the clamp for the field wiring by pinching and pulling the hook of the clamp by means of pinchers.
Page 368 SERVICING Ó WARNING: TURN OFF all the main switches 10.2.21. REMOVING THE ISPM 1. Disconnect all the wires that are connected to the ISPM: – Disconnect CN206, CN207. – Disconnect N, P, P1, RB and R, S, T, U, V, W on ISPM.
Page 369 SERVICING Ó WARNING: TURN OFF all the main switches 10.3. OUTDOOR UNIT RAS-2.5~5HN(V)E 10.3.1. REMOVING SERVICE COVER 1. Remove the main parts according to the following procedures. To reassemble perform the procedures in reverse. 2. To prevent contamination of the refrigerant with water or foreign particles, do not expose open to atmosphere for long periods.
Page 370 SERVICING Ó WARNING: TURN OFF all the main switches 10.3.4. REMOVING OUTDOOR FAN MOTOR 1. Disconnect the connectors for the motors in the electrical box, cut the plastic tie of the motor clamp by using nipper and remove the four fixing screws for the motor. NOTES: Fan Motor Lead Wires –...
Page 371 SERVICING Ó WARNING: TURN OFF all the main switches For RAS-2.5~5HN(V)E Terminal Box Cover 5. Remove the terminal panel for the compressor and disconnect the wiring to the compressor terminals. Make sure that the terminal numbers and the mark band are correct.
Page 372 SERVICING Ó WARNING: TURN OFF all the main switches For RAS-2.5~3HN(V)E Foot Position 10. Remove the nut that fix the compressor and remove the compressor. There is no nut at the rear side. When you are removing the compressor, pay special attention 0 = Exits not to touch or deform the surrounding pipes.
Page 373 SERVICING Ó WARNING: TURN OFF all the main switches 10.3.6. REMOVING HIGH PRESSURE SWITCH AND PRESSURE SWITCH FOR CONTROL 1. Remove the service cover according to the item “Removing Upper Cover Service Cover”. 2. Remove the nine (9) M5 screws fixing the rear cover and Screw the five (5) M5 screws fixing the pipe rear cover.
Page 374 SERVICING Ó WARNING: TURN OFF all the main switches RAS-2.5~3HN(V)E 10.3.7. REMOVING COIL FOR REVERSING VALVE Ô DANGER: Do not touch the electrical parts when LED 1 (Red) on the PCB is lit to prevent from an electrical shock. Reversing Valve 1.
Page 375 SERVICING Ó WARNING: TURN OFF all the main switches 10.3.8. REMOVING COIL FOR EXPANSION VALVE Ô DANGER: Pull out the expansion valve coil Do not touch the electrical parts when LED 1 (Red) on upwards the PCB is lit to prevent from an electrical shock. Expansion valve coil 1.
Page 376 SERVICING Ó WARNING: TURN OFF all the main switches 10.4. RCI 4-Way Cassette 10.4.1. REMOVING THE LONG LIFE FILTER Knob 1. The long life filter is located inside of the air intake grille. Detach the filter after opening the air intake grille. By pushing the knob in the arrow mark direction, the air intake grille can be opened.
Page 377 SERVICING Ó WARNING: TURN OFF all the main switches 10.4.4. REMOVING THE OPTIONAL AIR PANEL 1. Remove the electrical box cover according to the item "Removing the Electrical Box Cover". Disconnect the connector CN17 for louver motor on the Electrical indoor PCB.
Page 378 SERVICING Ó WARNING: TURN OFF all the main switches 10.4.6. REMOVING THE BELL-MOUTH 1. Remove three (3) screws fixing the bell-mouth onto the drain pan and remove the bell-mouth. 2. Remove nut and washer fixing the runner and remove the runner.
Page 379 SERVICING Ó WARNING: TURN OFF all the main switches 10.4.8. REMOVING THE DRAIN PAN 1. Remove the optional air panel according to the item "Removing the Optional Air Panel". 2. Remove the electrical box cover according to the item "Removing the Electrical Box Cover". Disconnect the connectors of the air outlet thermistor, piping thermistors (2), electronic expansion valve, drain pump, float switch and fan motor.
Page 380 SERVICING Ó WARNING: TURN OFF all the main switches Ó WARNING: TURN OFF all the main switches and disconnect the power supply from the unit. 10.4.11. REMOVING THE THERMISTOR FOR LIQUID PIPE AND GAS PIPE 1. Remove the optional air panel according to the item Thermistor for Fixing Plate "Removing the Optional Air Panel".
Page 381 SERVICING Ó WARNING: TURN OFF all the main switches 6. Turn the lock nut by a few turn, and the drive part is separated from the screw and can be removed. 7. Prepare the new drive part for replacement (service part) Pulse Motor with the position of the driver (drive screw) already adjusted.
Page 382 SERVICING Ó WARNING: TURN OFF all the main switches 10.5. RCIM – FSN 4-Way Cassette 10.5.1. REMOVING THE AIR FILTER 1. The air filter is located inside of the air intake grille. Detach Knob the filter after opening the air intake grille. By pushing the knob in the arrow mark direction, the air intake grille can be opened.
Page 383 SERVICING Ó WARNING: TURN OFF all the main switches 10.5.4. REMOVING THE OPTIONAL AIR PANEL Enlarged View 1. Open the intake air grille and disconnect the connector for Connector for Auto Swing Motor the auto louver (Air Panel Side) Connector for Auto Swing Motor (Indoor Unit Side) Without Air Inlet Grille Electrical Box...
Page 384 SERVICING Ó WARNING: TURN OFF all the main switches 10.5.5. REMOVING THE FAN RUNNER AND FAN MOTOR 1. Remove the intake air grille according to “1. Removing Air Filter and Intake Air Grille.” Float Switch Connector (CN14) 2. Drawing Electrical Box Electrical Box –...
Page 385 SERVICING Ó WARNING: TURN OFF all the main switches 10.5.7. REMOVING THE PRINTED CIRCUIT BOARD (PCB) 1. Remove the air intake grille according to the "Removing the Air Intake Grille". Power transformer 2. Remove the electrical box cover according to the item Holder "Removing the Electrical Box Cover".
Page 386 SERVICING Ó WARNING: TURN OFF all the main switches 10.5.9. REMOVING THE DRAIN-UP MECHANISM 1. Remove the drain pan according to the item "Removing the Drain Pan". Fixing Plate Drain-Up Mechanism Screws 2. Remove the hose band and remove the drain hose. 3.
Page 387 SERVICING Ó WARNING: TURN OFF all the main switches 10.5.10. REMOVING THE FLOAT SWITCH 1. Remove the drain pan according to “Removing Drain Pan”. Screw Resin Nut 2. Removing Float Switch: Fixing Plate for Float – The float switch is located at the rear side of the drain pan.
Page 388 SERVICING Ó WARNING: TURN OFF all the main switches 10.5.11. REMOVING THE THERMISTOR FOR LIQUID PIPE AND GAS PIPE 1. Remove the optional air panel according to the item Heat Exchanger "Removing the Optional Air Panel". Motor 2. Remove the bell-mouth according to No.3 of the item "Removing the Fan Runner and Fan Motor".
Page 389 SERVICING Ó WARNING: TURN OFF all the main switches NOTE: Do not apply strong forces such as the rotating torque Pulse Motor and the bending load to the motor by holding the motor by hand when tightening the lock nut. The direction of the eccentric part of the motor is Drive Part assembled as the eccentric part of the valve body, the...
Page 390 SERVICING Ó WARNING: TURN OFF all the main switches 10.5.12. REMOVING THE AUTOMATIC LOUVER MOTOR 1. Remove the optional air panel according to the item "Removing the Optional Air Panel". Louver Setscrew (1) 2. Disconnect the connecter connected to the AS motor. 3.
Page 391 SERVICING Ó WARNING: TURN OFF all the main switches 10.6. RCD 2-way cassette 10.6.1. REMOVING THE LONG-LIFE FILTER AND THE AIR INLET GRILLE 1. The long-life filter is located inside of the air inlet grille. You Upper Part of Filter Upper Part of Filter can open the air inlet grille by pushing the knob as shown Hinges...
Page 392 SERVICING Ó WARNING: TURN OFF all the main switches 10.6.4. REMOVING THE FAN RUNNER AND THE FAN MOTOR 1. Remove the optional air panel according to the section "Removing the Optional Air Panel". 2. Removing the Electrical Box. a. Disconnect the connectors for each wire. b.
Page 393 SERVICING Ó WARNING: TURN OFF all the main switches 4. Remove the fan runner and the fan motor Remove the fan runner after removing the cap nut and the washer that fixes the fan runner. – Disconnect the ground wire for the fan motor. –...
Page 394 SERVICING Ó WARNING: TURN OFF all the main switches 10.6.6. REMOVING THE FLOAT SWITCH 1. Remove the air inlet grille according to the section Removing the Long-Life Filter and the Air Inlet Grille". 2. Remove the bell mouth according to the section "Removing the Fan Runner and the Fan Motor".
Page 395 SERVICING Ó WARNING: TURN OFF all the main switches 10.6.8. REMOVING THE DRAIN PAN 1. Remove the air inlet grille according to the section "Removing the Long-Life Filter and the Air Inlet Grille". RCD-1.0 to 3.0 FSN RCD-1.5 to 3.0 FSN 2.
Page 396 SERVICING Ó WARNING: TURN OFF all the main switches 10.6.9. REMOVING THE THERMISTOR FOR LIQUID PIPE AND GAS PIPE 1. Remove the optional air panel according to the section "Removing the Optional Air Panel". Liquid Side Thermistor for 2. Remove the bell mouth according to the section "Removing Liquid Side Thermistor for Gas Pipe...
Page 397 SERVICING Ó WARNING: TURN OFF all the main switches 9. Tighten the lock nut with a spanner after tightening lightly by hand. The tightening torque should be within the range of 12Nm (120kg-cm) to 15Nm (150kg-cm). Pulse Motor Pulse Motor NOTE: Drive Part Drive Part...
Page 398 SERVICING Ó WARNING: TURN OFF all the main switches 10.7. RPI In-the-ceiling type RPI-2.0~5.0 FSNE 10.7.1. REMOVING THE AIR INLET THERMISTOR 1. Remove the screws that fix the fan panel. 2. The thermistor is located on the left side. 10.7.2. REMOVING THE THERMISTORS FOR LIQUID PIPE AND GAS PIPE 1.
Page 399 SERVICING Ó WARNING: TURN OFF all the main switches 10.7.4. REMOVING THE FAN UNIT 1. Remove the screws that fix the fan panel. 2. Remove the screws that fix the back panel. 3. Remove the fan motor. 4. Loosen the screw that fixes each fan runner. 5.
Page 400 SERVICING Ó WARNING: TURN OFF all the main switches RPI-8/10 FSNE 10.7.8. REMOVING THE INLET AIR THERMISTOR 1. Remove the screws that fix the electrical box panel. Inlet air thermistor 2. The thermistor is located on the heat exchanger border. 3.
Page 401 SERVICING Ó WARNING: TURN OFF all the main switches 2 upper fixing screws Electrical box panel Side panel 2 nuts Capacitor Fan casing Fan motor 2 suspension bolts Upper view Side view 10.7.12. REMOVING THE FLOAT SWITCH 1. Remove the screws that fix the electrical box panel 2.
Page 402 SERVICING Ó WARNING: TURN OFF all the main switches 10.7.14. REMOVING OTHER ELECTRICAL BOX COMPONENTS 1. Remove the screws that fix the electrical box panel 2. Disconnect all the wires that are connected to each electrical component. 4. Remove the terminal board for power source 5.
Page 403 SERVICING Ó WARNING: TURN OFF all the main switches 10.8. RPC Ceiling type 10.8.1. REMOVING THE AIR FILTER 1, The air filter is located inside of the air inlet grille. Remove the air filter after opening the air inlet grilles. 2.
Page 404 SERVICING Ó WARNING: TURN OFF all the main switches Fixing screw 3. Pull out the deflector including the bearing after removing the four fixing screws at the right and the left. Air deflection Air deflection Bearing 10.8.4. REMOVING THE FAN MOTOR 1.
Page 405 SERVICING Ó WARNING: TURN OFF all the main switches 6. Loosen the screws by means of a hexagon wrench. Motor loosen Allen key Coupling 7. After removing the fixing band, remove the fan motor by sliding the fan motor backwards. Pay attention not to drop Fixing band the fan motor.
Page 406 SERVICING Ó WARNING: TURN OFF all the main switches 10.8.7. REMOVING THE AUTOMATIC LOUVER MOTOR 1. Remove the right-side panel according to the section "Removing the Side Panel". 2. Remove the M4 screws and remove the AS motor assembly from the right shaft of the discharge air grille. Pay attention not to damage the AS Motor assembly.
Page 407 SERVICING Ó WARNING: TURN OFF all the main switches 10.8.9. REMOVING THE PRINTED CIRCUIT BOARD (PCB) 1. Open the air inlet panel according to the section "Removing the Air Filter". 2. Disconnect the wiring connector for the fan motor. 3. Turn the electrical box according to item 4 of the section "Removing the Fan Motor"...
Page 408 SERVICING Ó WARNING: TURN OFF all the main switches 10.9.2. REMOVING THE FRONT PANEL Bush SCREW FRONT PANEL 1. Press the "PUSH" marks at both ends of the front panel and open the suction grille by pulling toward the front side. 2.
Page 409 SERVICING Ó WARNING: TURN OFF all the main switches 10.9.3. REMOVING THE MOTOR FOR THE AUTOMATIC LOUVER Connector (White) Connector (Black) 1. Remove the front panel according to the section "Removing the Front Panel". Screws (4 pcs.) 2. Remove the electrical box according to the section "Removing the Electrical Box Panel".
Page 410 SERVICING Ó WARNING: TURN OFF all the main switches Vertical louver 5. Removing the thermistor for the discharge air Remove the thermistor for the discharge air from the holder of the vertical louver and the hook at the right side of the air outlet.
Page 411 SERVICING Ó WARNING: TURN OFF all the main switches 10.9.6. REMOVING THE DRAIN PAN 1. Remove the front panel according to the section "Removing Heat Heat exchanger the Front Panel". exchanger 2. Remove the electrical box according to the section Detach "Removing the Electrical Box Panel".
Page 412 SERVICING Ó WARNING: TURN OFF all the main switches 7. Lift up the heat exchanger. Draw out the rear piping of the Unit body heat exchanger from the square hole by pulling the upper Square hole part of the heat exchanger forward, and then remove the heat exchanger.
Page 413 SERVICING Ó WARNING: TURN OFF all the main switches Partition 6. For attaching the fan motor and the fan, perform in reverse Partition plate plate order the procedure for removing the fan motor and the fan. Fan motor Bearing 7. Fix the fan at the position with a 8mm clearance between the left end (bearing side) of the fan and the partition plate.
Page 414 SERVICING Ó WARNING: TURN OFF all the main switches NOTE: Do not apply great forces, such as the rotating torque and the bending load, to the motor by holding the motor by hand when you are tightening the lock nut. Although the direction of the eccentric part of the motor is Pulse Motor Pulse Motor...
Page 415 SERVICING Ó WARNING: TURN OFF all the main switches 10.10. RPK-2.5~4.0 NOTE: In order to remove the filter, you need to change the louver position using one of the following remote control switches: PC-P1HE and PC-RLH3A. SWING SET TEMP. HIGH ON/OFF TIMER LOUVER 1.
Page 416 SERVICING Ó WARNING: TURN OFF all the main switches 10.10.1. REMOVING THE RIGHT SIDE COVER 1. Remove one screw fixing the right side cover. Release Catch Remove Screw. Remove Screw Release Catch 2. Release the lower left side catch of the right side cover. Pull the right cover slighty and release the catch.
Page 417 SERVICING Ó WARNING: TURN OFF all the main switches 10.10.2. REMOVING THE THERMISTORS FOR LIQUID PIPE, GAS PIPE, DISCHARGE AIR AND SUCTION AIR 1. Remove the right side cover according to the section Expansion Expansion “Removing right side cover”, and remove the suction air Valve Valve grille.
Page 418 SERVICING Ó WARNING: TURN OFF all the main switches 10.10.3. REMOVING THE DRAIN PAN 1. Remove the right side cover according to the section “Removing right side cover”, and remove the suction air grille. 2. Pull the cover of the discharge air lower side toward the front side, and remove it.
Page 419 SERVICING Ó WARNING: TURN OFF all the main switches 10.10.4. REMOVING THE ELECTRICAL BOX PANEL 1. Remove the right side cover according to the section Connector for Connector for Connector for Gas Connector for Gas Fan Motor (CN29) “Removing right side cover”, and remove the suction air Fan Motor (CN29) and Freeze Protection and Freeze Protection...
Page 420 SERVICING Ó WARNING: TURN OFF all the main switches 10.10.5. REMOVING THE HEAT EXCHANGER 1. Remove the right side cover according to the section “Removing right side cover”, and remove the suction air grille. Pipe Pipe Holder Holder 2. Remove the drain pan according to the section “Removing the drain pan”.
Page 421 SERVICING Ó WARNING: TURN OFF all the main switches 10.10.6. REMOVING THE FAN AND THE FAN MOTOR 1. Remove the heat exchanger according to the section “Removing the heat exchanger”. Screw 2. Remove one screw and two catches at the cover of the Screw Cover Cover...
Page 422 SERVICING Ó WARNING: TURN OFF all the main switches 10.10.7. REMOVING THE SUCTION AIR GRILLE 1. Remove the right side cover according to the section “Removing right side cover”. 2. Remove one screw of the left side cover. Left Side Left Side Cover Cover...
Page 423 SERVICING Ó WARNING: TURN OFF all the main switches 10.10.8. REMOVING THE ELECTRONIC EXPANSION VALVE COIL 1. Remove the front panel according to the section "Removing the Front Panel". 2. Remove the electrical box according to the section "Removing the Electrical Box Panel". 3.
Page 424 SERVICING Ó WARNING: TURN OFF all the main switches NOTE: Do not apply great forces, such as the rotating torque and the bending load, to the motor by holding the motor by hand when you are tightening the lock nut. Pulse Motor Although the direction of the eccentric part of the motor is Pulse Motor...
Page 425 SERVICING Ó WARNING: TURN OFF all the main switches 10.11.2. REMOVING FRONT PANEL 1. Open the left panel completely. After removing the back of right arm pushing towars inside, Flat Panel remove the flat panel slowly pulling and closing. 2. Remove the air filter. Front Panel 3.
Page 426 SERVICING Ó WARNING: TURN OFF all the main switches 10.11.3. REMOVING THE ELECTRICAL BOX PANEL 1. Remove the front panel according to the section "Removing Fixed screw for electrical box Fixed screw for front panel". earth wiring 2. Remove the cover of the electrical Box Panel 3.
Page 427 SERVICING Ó WARNING: TURN OFF all the main switches 10.11.5. REMOVING THE THERMISTORS FOR LIQUID PIPE, GAS PIPE, DISCHARGE AIR AND SUCTION AIR 1. Remove the front panel according to the section "Removing Thermistor for discharge air Thermistor for defrosting front panel".
Page 428 SERVICING Ó WARNING: TURN OFF all the main switches 10.11.6. REMOVING THE DRAIN PAN 1. Remove the front panel according to the section "Removing front panel". 2. Remove the electrical box panel panel according to the section "Removing electrical box panel" 3.
Page 429 SERVICING Ó WARNING: TURN OFF all the main switches 10.11.7. REMOVING THE HEAT EXCHANGER 1. Remove the front panel according to the section "Removing Unit back side Piping cover front panel". 2. Remove the electrical box panel panel according to the section "Removing electrical box panel".
Page 430 SERVICING Ó WARNING: TURN OFF all the main switches 10.11.8. REMOVING THE FAN AND THE FAN MOTOR 1. Remove the heat exchanger according to the section Motor holder "Removing the heat exchanger". 2. Remove the motor holder 3. Loose the screw that fixes fan motor bearing and the fan. Motor holder fixed screw Fan Motor...
Page 431 SERVICING Ó WARNING: TURN OFF all the main switches 10.11.9. REMOVING THE ELECTRONIC EXPANSION VALVE COIL 1. Remove the front panel according to the section "Removing front panel". 2. Remove the electrical box panel panel according to the section "Removing electrical box panel" 3.
Page 432 SERVICING Ó WARNING: TURN OFF all the main switches 10.11.10. REMOVING THE PRINTED CIRCUIT BOARD 1. Remove the electrical box panel panel according to the section "Removing electrical box panel" Receiver wiring connector 2. Remove service board wiring connector of control PCB, sensor wiring connector and earth line.
Page 433 SERVICING Ó WARNING: TURN OFF all the main switches 7. Leave power source printed board unresolved after removing space lock of power source printed board (Removing the spacer totally is not required). Spacer 8. Remove the side cover of electricl box after removing the 3 locks of side cover.
Page 434 SERVICING /100 Ó WARNING: TURN OFF all the main switches 10.12. RPF Floor Type 10.12.1. REMOVING THE AIR INLET GRILLE 1. Loosen the screws for the fixing plate at the right side of each air inlet grille. Then, move the fixing plates. 2.
Page 435 SERVICING /101 Ó WARNING: TURN OFF all the main switches 10.12.4. REMOVING THE FRONT PANEL 1. Remove the air filter according to the section "Removing the Air Filter". 2. Remove the front panel from the slit after removing the four Front fixing screws at the lower part and pulling out the front panel panel...
Page 436 SERVICING /102 Ó WARNING: TURN OFF all the main switches 8. After removing the fixing plate, remove the fan motor by sliding the fan motor backwards. Pay attention not to drop the fan motor. Band Fixing screw 10.12.6. REMOVING THE PRINTED CIRCUIT BOARD (PCB) 1.
Page 437 SERVICING /103 Ó WARNING: TURN OFF all the main switches 10.12.7. REMOVING THE THERMISTORS FOR LIQUID PIPE AND GAS PIPE 1. Remove the air inlet grille according to the section "Removing the Air Inlet Grille". Side panel 2. Remove the air filter according to the section "Removing the Air Filter".
Page 438 SERVICING /104 Ó WARNING: TURN OFF all the main switches 3. Remove the front upper panel after removing the eleven fixing screws. Screw Front upper panel 10.13.3. REMOVING THE FAN MOTOR 1. Remove the air filter according to the section "Removing the Air Filter".
Page 439 SERVICING /105 Ó WARNING: TURN OFF all the main switches 10.14. CLEANING THE INDOOR HEAT EXCHANGER 10.14.1. REQUIRED TOOLS FOR CLEANING (FOR ALL INDOOR UNITS) Tool Remarks Cleaning water pump A water pump that is equipped with a tank is recommended Water tank clean water Approx.
Page 440 SERVICING /106 Ó WARNING: TURN OFF all the main switches Remarks Cleaning water collector − In-the-ceiling type − 2-way cassette − Wall type − Ceiling type Insert the Insert the bar Transparent vinyl sheet Boss Hose Inner side of Ø120 hole should be covered with felt sheet in order to insert the spray nozzle. Cleaning water collector kit −...
Page 441 SERVICING /107 Ó WARNING: TURN OFF all the main switches 10.14.2. CLEANING THE 4-WAY CASSETTE INDOOR UNIT Spread a vinyl sheet over the floor in order to protect furniture and others from the cleaning water before doing this work. Procedure: NOTES: –...
Page 442 SERVICING /108 Ó WARNING: TURN OFF all the main switches 2. Scratch off the dust on the inner surface of the heat exchanger downwards by means of a brush. Collect all the dust in a bucket or a carton box. 3.
Page 443 SERVICING /109 Ó WARNING: TURN OFF all the main switches 5. Insert the spray nozzle through the hole of the cleaning water collector. Operate the water pump and clean the dust on the heat exchanger. After cleaning, spray the clean water in order to remove the cleaning water.
Page 444 SERVICING /110 Ó WARNING: TURN OFF all the main switches 7. Check the insulation of the drain pump with a megohm- meter. Make sure that the insulation is greater than 1 MΩ when 500V is applied. 8. Connect the wiring as the wiring was connected before. 9.
Page 445 SERVICING /111 Ó WARNING: TURN OFF all the main switches 6. Suspend the cleaning water collector from the indoor unit. Indoor unit – Connect a rope to the suspension bracket of the indoor unit and put the rope downwards. – Insert the support bar into the hole of the cleaning water collector.
Page 446 SERVICING /112 Ó WARNING: TURN OFF all the main switches 10.14.4. CLEANING THE WALL TYPE INDOOR UNIT Spread a vinyl sheet over the floor in order to protect furniture and others from the cleaning water before doing this work. 1. Remove each part according to the section "Wall Type". 2.
Page 447 SERVICING /113 Ó WARNING: TURN OFF all the main switches 4. By lifting the drain hose, put the end of the hose in a bucket. Bucket Drain hose 5. Removing the Dust on the Heat Exchanger Remove the dust on the heat exchanger with a brush by scratching the dust downwards.
Page 448 SERVICING /114 Ó WARNING: TURN OFF all the main switches 8. After checking that no power is supplied, connect the drain pipe and remove the insulation tape for the wiring connectors. Then, mount the front panel correctly. 9. Check the insulation of the terminal board in the electrical box.
Page 449 SERVICING /115 Ó WARNING: TURN OFF all the main switches 9. Cover all the components (except the drain pan) with a vinyl sheet in order to avoid the splashed cleaning water. 10. Spray the cleaning water over the fins from the rear side of the heat exchanger.
Page 451 MAIN PARTS 11 MAIN PARTS CONTENTS MAIN PARTS _____________________________________________________________ 1 11.1. Inverter __________________________________________________________________ 2 11.1.1. Specification of inverter (single phase)__________________________________________2 11.1.2. Specifications of inverter (Three phase)_________________________________________3 11.1.3. Inverter time chart__________________________________________________________5 11.1.4. Protective Function_________________________________________________________6 11.2. Thermistor________________________________________________________________ 7 11.2.1. Resistance value of the thermistor _____________________________________________8 11.3.
Page 452 MAIN PARTS 11.1. INVERTER 11.1.1. SPECIFICATION OF INVERTER (SINGLE PHASE) Applicable Model RAS-2~6HVRNE Applicable Power Source 1 Phase, 220V, 240V 50Hz/220V 60 Hz Input Voltage 180 ~ 264 VAC Input Current RAS-2/3HVRNE: 24A; RAS-4/5HVRNE:30A (at Rated current 220/240V 50Hz) Control Method Vector Control Range Output Frequency 20 to 115Hz...
Page 453 MAIN PARTS 11.1.2. SPECIFICATIONS OF INVERTER (THREE PHASE) Aplicable model RAS-4~12HRNE Applicable Power Source 3 Phase, 380V, 415V 50/HZ Input Voltage RAS-4~12HRNE 8~64A Control Method Vector Control Range Output Frequency 20~115HZ Accuracy of Frequency 0,01 Controlled Frequency 0,01 Hz at Applicable frequency range Output / Characteristics Conditions: 1.
Page 454 MAIN PARTS Protection Function Overcurrent Protection for Inverter Detecting current is more than 150% of the rated current. Rated Current x 150% Rated Current x 105% 20µs 20ms Time Internal Protection (1) Short-Circuit Trip of Arm Transistor Module or ISPM (2) Instantaneous Overcurrent Trip (3) Instantaneous Overcurrent Trip (4) Electronic Thermal Trip...
Page 455 MAIN PARTS 11.1.3. INVERTER TIME CHART Main Circuit Frequency LOW Power Source Frequency All bit 1 All bit 1 Operation HIGH Frequency Instruction Output Voltage Soft Start-Stop (Frequency) The changing speed depends on the outer setting. Failure Signal Output Activation of Protection Device Transmit Protection...
Page 456 MAIN PARTS 11.1.4. PROTECTIVE FUNCTION 1. Excessive High or Low Voltage for Inverter 4. Protection of Transistor Module and ISPM a) Level of Detection a) Level of Detection - When the voltage of direct current is greater than When some of the output terminals between “U” and (A) V, abnormalities are detected.
Page 457 MAIN PARTS 11.2. THERMISTOR Thermistors for the outdoor unit Thermistor for the discharge gas temperature (THM8 for inverter compressors; THM9 for constant speed compressors) Thermistor for the evaporating temperature (THM10, THM11 Thermistor for the and THM15) outdoor ambient temperature (THM7) Thermistors for the indoor unit Thermistor for the gas pipe temperature in...
Page 458 MAIN PARTS 11.2.1. RESISTANCE VALUE OF THE THERMISTOR Overheating prevention of the discharge gas (Thermistor for checking the upper part of compressor: THM8 and THM9) a. There is a thermistor that checks the temperature of the upper part of the compressor in order to prevent the discharge gas from overheating.
Page 459 MAIN PARTS Thermistor for the room temperature control Thermistor for the control of the discharge air (thermistor for the inlet air temperature of the temperature (Thermistor for the discharge air indoor unit, THM1) temperature of the indoor unit, THM2) The thermistor for the inlet air temperature (THM1) controls The thermistor for the discharge air temperature (THM2) the room temperature.
Page 460 MAIN PARTS 11.3. ELECTRONIC EXPANSION VALVE 11.3.1. ELECTRONIC EXPANSION VALVE FOR THE OUTDOOR UNIT Micro-computer Pulse signal Pulse motor 2-Phase permanent magnetic pulse motor Control 0 to 500 pulse by 1 pulse Refrigerant flow control Precise control Needle Items Specifications Applicable to the models For the main cycle of H(V)RNE / HN(V)E series EKV (10.0USRT) series for RAS-8~12HRNE...
Page 461 MAIN PARTS 11.3.2. ELECTRONIC EXPANSION VALVE FOR THE INDOOR UNIT Micro-computer Pulse signal Pulse Motor Pulse Motor 2-Phase permanent magnetic pulse motor Gear Gear Control 0 to 2,000 pulse by 1 pulse Output Shaft Output Shaft Refrigerant flow control Lock Nut Lock Nut Bellows Bellows...
Page 462 MAIN PARTS 11.4. PRESSURE SENSOR For RAS-2~6H(V)RNE / HN(V)E 1. High Pressure Switch (for Protection) When the discharge pressure reaches 4.15MPa, compressor is stopped to protect the refrigerant cycle components. 2. Pressure Switch for Control When the discharge pressure reaches 3.2MPa during heating operation, gas by-pass control or fan control are performed. Example: RAS-3HVRNE Example: RAS-4~6HVRNE Upper Cover...
Page 463 MAIN PARTS 11.5. AUTO LOUVER MECHANISM 11.5.1. RCI / RCIM (4-WAY CASSETTE TYPE) 1. Auto-Louver Operation The louvers of the optional air panel with auto-louver swing simultaneously by four drive motor. The parts of the auto-louver mechanism are shown below. The motor (1) is installed to the louver directly.
Page 464 MAIN PARTS 11.5.2. RCD (2-WAY CASSETTE TYPE) 1. Auto-Louver Operation The louvers of the optional air panel with auto-louver swing simultaneously by a drive motor. The parts of the auto-louver mechanism are shown below. Sttoper Louver Bearing Bearing Shaft B Sttoper Sttoper AS Motor Assembly...
Page 465 MAIN PARTS 11.5.3. RPC (CEILING TYPE) (1) AS Motor 1. Auto-Louver Operation The louvers of the optional air panel with autolouver swing simultaneously by a drive motor. (2) Pinion The parts and the principle of the auto-louver mechanism are (5) Cover shown in the right figure.
Page 466 MAIN PARTS 11.6. SCROLL COMPRESSOR 11.6.1. RELIABLE MECHANISM FOR LOW VIBRATION AND LOW SOUND 1. The rotating direction is definite. 2. The pressure inside of the chamber is high pressure, and the surface temperature of the chamber is 60 °C to 110 °C. 11.6.2.
Page 467 FIELD WORK INSTRUCTION 12 FIELD WORK INSTRUCTION CONTENTS FIELD WORK INSTRUCTION________________________________________________ 1 12.1. Guideline for selecting the drain pipe for the Indoor Unit ___________________________ 2 12.2. Caution with the refrigerant leakage ___________________________________________ 2 12.2.1. Maximum Permissible Concentration of the HCFC Gas ____________________________ 2 12.2.2.
Page 468 FIELD WORK INSTRUCTION WARNING: TURN OFF all the main switches. 12.1. GUIDELINE FOR SELECTING THE DRAIN PIPE FOR THE INDOOR UNIT Method for selecting the drain pipe diameter NOTE: 1. Calculation of the Drain Flow Volume VP20 and VP25: Not Applicable to the Common Pipe Calculate that the drain flow volume is approximately VP30, VP40 and VP50: Applicable to the Common Pipe 3 (I/hr) per 1HP of the nominal capacity of the indoor unit.
Page 469 FIELD WORK INSTRUCTION 4. Pay a special attention to the place, such as a basement 12.2.3. COUNTERMEASURE FOR THE and others, where the refrigerant may stay, because the REFRIGERANT LEAKAGE ACCORDING refrigerant is heavier than the air. TO THE KHK STANDARD System A Outdoor unit System B Outdoor unit According to the KHK standards, you should arrange the...
Page 470 FIELD WORK INSTRUCTION 12.4. SERVICE AND MAINTENANCE RECORD Check item Action Judgement Check item Action Judgement Is the service area Check for a leakage in sufficient? the electronic expansion ditto Good Not good valve. Is there a short circuit of the discharged air? Check for a leakage in ditto...
Page 471 FIELD WORK INSTRUCTION 12.5. SERVICE AND MAINTENANCE RECORD BY MEANS OF THE 7-SEGMENT DISPLAY 12.5.1. SERVICE AND MAINTENANCE RECORD BY MEANS OF THE 7-SEGMENT DISPLAY...
Page 472 FIELD WORK INSTRUCTION 12.5.2. PUMP-DOWN METHOD FOR REPLACING THE COMPRESSOR Procedure Remarks Turn off the main switch of the outdoor unit. Remove the covers, the thermistor, the crankcase Make sure that the terminal part of the detached power heater, the power wirings, and other items according supply wires is not exposed by the winding insulation to the chapter "Removing the Parts of the Oudoor tape and other items.
Page 473 FIELD WORK INSTRUCTION Procedure Remarks – When you stop the compressor for replacing: Check for a leakage of the check valve on the discharge gas side: – You can check the leakage of the check valve – DSW4-4 (Enforced stoppage of the compressor) by means of the Ps variation because the SVA →...
Page 474 FIELD WORK INSTRUCTION 12.5.3. CHECK DATA SHEET OF THE OUTDOOR UNITS RAS-8~12HRNE Client: Date: Remote control switch of the indoor unit Operation mode Test run is started at: Data is collected at: Data item Example ) Setting temperature of the indoor unit ) Air inlet temperature ) ...
Page 475 FIELD WORK INSTRUCTION . Air inlet temperature . Discharge air temperature Liquid pipe temperature of the heat exchanger . of the indoor unit . Outdoor temperature Gas pipe temperature of the heat exchanger . of the indoor unit. . Evaporating temperature at heating Control information...
Page 478 HITACHI is participating in the EUROVENT Certification Programme. Products are as specified in the EUROVENT Directory of Certified Products. Hitachi Air Conditioning Products Europe, S.A. Ronda Shimizu,1 - Políg. Ind. Can Torrella 08233 Vacarisses (Barcelona) España ISO 9001 Certified by AENOR, Spain...

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