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Hitachi UTOPIA IVX Series Service Manual

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UTOPIA IVX

SERIES

Service Manual

Outdoor Units: 8 ~ 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 IVX Series

Page 1 UTOPIA IVX SERIES Service Manual Outdoor Units: 8 ~ 12 HP Indoor Units Type: • 4-Way Cassette • 2-Way Cassette • Ceiling • In-the-Ceiling • Wall • Floor • Floor Concealed...
Page 3 Contents Contents Units installation Piping installation Electrical wiring Remote control switch installation Control system Available optional functions Test run Troubleshooting Spare parts Servicing Main parts Field work instruction Page iii SMGB0046 rev.0 - 03/2007...
Page 4 Contents Page iv SMGB0046 rev.0 - 03/2007...
Page 5 Contents UNITS CODE LIST  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 service manual. INDOOR UNITS FSN(1)(E/M) – System Free 4-Way-Cassette 4-Way-Cassette Mini 2-Way-Cassette Ceiling...
Page 6 Contents OUTDOOR UNITS HRNM Series Unit Code RAS–8HRNM 60278972 RAS–10HRNM 60278973 RAS–12HRNM 6028974 Meaning of model codiﬁcation: Unit Type (Outdoor Unit) Compressor power (HP) 8 ~ 12 System: Utopia Heat & Cool Compressor type: DC- Inverter R410A Refrigerant M: Multifunction Page vi SMGB0046 rev.0 - 03/2007...
Page 7 Contents COMPLEMENTARY SYSTEMS Accessory Name Code Figure KPI-2521 Total Heat Exchanger 60277481 KPI-5021 Total Heat Exchanger 60277482 KPI-8021 Total Heat Exchanger 60277483 KPI-10021 Total Heat Exchanger 60277484 EF-5GE Econofresh Kit 7E774148 CODE LIST ACCESSORIES Accessory Name Code Figure PC-P2HTE Remote control switch with Timer 7E899954 PC-P1HE Remote control switch...
Page 8 Contents Accessory Name Code Figure PC-RLH8 Receiver kit 60291106 for RCI-FSN1E on the panel PC-RLH9 Receiver kit 60291107 for RCI-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 60291294 (Figure not available) for RCIM-FSN on the panel...
Page 9 Contents Accessory Name Code Figure P-G23WA2 Air panel for RCI 60290534 P-N23WAM Air panel for RCIM 60197160 P-G23DWA1 Air panel for RCD 60299570 P-G46DWA1 Air panel for RCD 60299571 B-32H4 Adapter for deodorant ﬁlter 60199790 F-23L4-K Anti bacteria ﬁlter 60199791 F-23L4-D Deodorant ﬁlter 60199793...
Page 10 Contents Accessory Name Code Figure TE-08N Branch pipe 70800003 TE-10N Branch pipe 70800004 TRE-810N Branch pipe 70800010 QE-810N Branch pipe 70800006 AG-335A Air ﬂow guide 60291431 WSP-335A Wind guard 60291432 ASG-NP335F Snow protection hood 60291433 (Figure not available) ASG-NP335B Snow protection hood 60291434 ASG-NP335L Snow protection hood...
Page 11 Units installation Units installation This chapter provides information about the procedures you must follow to install the UTOPIA IVX HRNM Series outdoor units and the complete range of Hitachi indoor units. CONTENTS UNITS INSTALLATION ___________________________________________________ 1-1 1.1. Transportation of Outdoor Unit ______________________________________________ 1-4 1.2.
Page 12 Units installation 1.12 Optional accessories ____________________________________________________ 1-36 1.12.1. Fresh air intake for 4-way type Indoor Units ___________________________________1-36 1.12.2. T-Tube connecting kit for 4-way cassette type Indoor Units _______________________1-37 1.12.3. Branch discharge for 4-way cassette Indoor type Units __________________________1-37 1.12.4. Directional air ﬂow for 4-way cassette type Indor Units ___________________________1-38 1.12.5.
Page 13 Units installation UNITS INSTALLATION � 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 14 Units installation 1.1. TRANSPORTATION OF OUTDOOR UNIT Transport the product as close to installation location as practical before unpacking.   Caution: Warning: - Lift the outdoor unit in its factory packaging with 2 wire Do not put any foreign material into the outdoor unit ropes.
Page 15 Units installation 1.2. RCI 1.2.1. FACTORY-SUPPLIED ACCESSORIES 1.2.2. INITIAL CHECK Make sure that the following accessories are packed with – Install the indoor unit with a proper clearance around it the unit. paying careful attention to the installation direction for the piping, wiring and maintenance working space, as shown below.
Page 16 Units installation 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 –...
Page 17 Units installation UNITS INSTALLATION � Ceiling not completed with panels yet. Removing the air intake grille from the air � 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 18 Units installation 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 19 Units installation UNITS INSTALLATION � Wiring connection for the air panel � CAUTION: 2. Connect the connectors as shown below (view of the Before connecting connectors, firstly turn OFF power UNITS INSTALLATION electrical box) source. If the connectors are connected without turning OFF the power source, the auto-swing louver cannot function.
Page 20 Units installation 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 ~ 50 Suspension Bracket Approx.
Page 21 Units installation 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.
Page 22 Units installation 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 23 Units installation 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 24 Units installation 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 25 UNITS INSTALLATION Units installation Removing the air intake grille from the air panel: � � 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.
Page 26 Units installation 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 27 Units installation UNITS INSTALLATION � For semi-concealed installation. Mounting the indoor unit � – 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 28 Units installation 1.6. RPI RPI-8.0~10.0 1.6.1. FACTORY-SUPPLIED ACCESSORIES (Models: RPI-2.0~6.0FSN1E) Service space of (Models: RPI-8/10FSNE) false ceiling Make sure that the following accessories are packed with the unit. From top  NOTE: - If any of these accessories are not packed with the unit, please contact your dealer.
Page 29 Units installation 1.6.4. CONNECTING FIELD SUPPLY DUCT AND  Mounting the indoor unit SUCTION AIR FILTER SERVICING - Hook suspension bracket to the nut and washer of each suspension bolt, as shown, starting from one side.  Field Supply Duct installation - After checking that the nut and washer are correctly ﬁxed Fix the Flexible Air Duct to External Faces of unit ﬂanges by the retainers of the suspension bracket, hook the...
Page 30 Units installation RPI-8.0~10.0  ATTENTION: (RPI-8.0-10.0 only). – Optionally, if applying Suction Duct and keeping The Air Filter (3 panels) is ﬁxed by frames. Pull up the Air the standard Air Filter in its original location (not Filter and removed them as shown in the ﬁgure. recommended), be aware to make a servicing gate onto the Suction Air Duct, as shown in the ﬁgure.
Page 31 Units installation UNITS INSTALLATION UNITS INSTALLATION 1.7. RPK 1.7. RPK 1.7.1. 1.7.1. FACTORY-SUPPLIED ACCESSORIES FACTORY-SUPPLIED ACCESSORIES 1.7.2. 1.7.2. INITIAL CHECK INITIAL CHECK – Install the indoor unit with a proper clearance around – Install the indoor unit with a proper clearance around Make sure that the following accessories are packed with Make sure that the following accessories are packed with it for operation and maintenance working space as...
Page 32 sure that there is no gap between the front panel, the unit body. – Open the front panel and remove two screws (three parts) of upper side of the front panel. drain pan and the unit body. Units installation Front Panel Removing the right side cover �...
Page 33 Contour of Units installation the unit 1.7.3. DIMENSIONS OF THE MOUNTING BRACKET  RPK-2.0FSNM � RPK-1.5~2.0FSNM Mounting bracket Contour of the unit  RPK-2.5~4.0FSNM RPK-2.5~4.0FSNM � Mounting bracket Contour of the unit Page 1-23 SMGB0046 rev.0 - 03/2007...
Page 34 Units installation UNITS INSTALLATION 1.8. RPF (FLOOR TYPE) / RPFI (FLOOR-CONCEALED TYPE) – Service access panel 1.8.1. FACTORY-SUPPLIED ACCESSORIES Provide a service access door or panel as shown below. Make sure that the following accessories are packed with the unit. �...
Page 35 Units installation 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 36 Units installation 1.9 COMPLEMENTARY SYSTEMS 1.8. COMPLEMENTARY SYSTEMS Installation 1.9.1 KPI - TOTAL HEAT EXCHANGER 1.8.1. KPI (TOTAL HEAT EXCHANGER) � � Mounting the suspension bolts Factory-supplied accessories � - Mark the positions of the sling bolts, refrigerant piping Make sure that the following accessories are packed with connections and drain connection.
Page 37 Units installation UNITS INSTALLATION � Attaching the duct connecting flanges � NOTE: - Use the screws supplied to secure the duct connecting In case of that the sling bolts are too short, re-attach flanges to the unit. the suspension bracket in an alternative position. Remove the screws at the top mounting position.
Page 38 Units installation UNITS INSTALLATION � CAUTION: 1.9.2 ECONOFRESH KIT 1.8.2. ECONOFRESH KIT Before connecting the ducts, check that no sawdust Factory-supplied accessories � or any other foreign matter (scraps of paper, vinyl, etc.) has found its way inside the ducts. Make sure that the following accessories are packed with the unit.
Page 39 Units installation UNITS INSTALLATION 1.10 RAS-HRNM 1.9. RAS FSVNE � � WARNING: CAUTION: – Install the Outdoor Unit with sufﬁcient clearance around – Install the outdoor unit with sufficient clearance around it – Check to ensure that the foundation is flat, level and it for operation and maintenance as shown in the next for operation and maintenance as shown in the next sufficiently strong.
Page 40 Units installation UNITS INSTALLATION 1.10.1 INSTALLATION SPACE 11.2. SERVICE SPACE Single Installation Around sides are open Around sides are open with obstacles above Around sides are closed Around sides are closed with obstacles above Multiple Installation Around sides are open Around sides are open with obstacles above Multi-Row �...
Page 41 UNITS INSTALLATION Units installation 11.3. INSTALLATION PLACE PROVISION 1.10.2 INSTALLATION PLACE PROVISION 11.3.1. INSTALLATION WORK 5. When installing the unit on a roof or a veranda, drain 1. Secure the outdoor unit with the anchor water sometimes turns to ice in a cold morning. Therefore, avoid draining in an area where people Flow direction often use because it is slippery.
Page 42 Units installation 1.11. INSTALLATION OF WIND WARD AND SNOW PROTECTION HOOD 1.11.1. Air ﬂow guide, wind guard and snow protection hood Optional parts Model Air flow guide 8 to AG-335A X 2 Wind guard WSP-335A X 2 Snow Stainless Air outlet ASG-NP335F X 2 protection plate...
Page 43 Units installation  Wind guard Speciﬁcations Model WSP-335A Quantity 2 per unit Material Galvanized sheet metal + baked painting Color Gray (1.oY8.5/0.5) Weight 5.5 kg Accessories Fixing screw x 4 [M5 (SUS) x 20] Installation manual Installation restriction “Guard net”, “Air flow guide” or “Snow protection hood”...
Page 44 Units installation  Snow protection hood Air discharge hood No. Part name Q’ty Right side plate Left side plate Front panel Stay Rear suction hood No. Part name Q’ty Upper right side plate Upper left side plate Upper front panel (Upside) Upper front panel...
Page 45 Units installation Attaching exaple of snow protection hood Speciﬁcations of snow protection hood Product name Air discharge hood Rear suction hood Left suction hood Model ASG-NP335F ASG-NP335FS ASG-NP335B ASG-NP335BS ASG-NP335L ASG-NP335LS Quantity 2 per unit 1 per unit Material Bonderized Stainless Bonderized Stainless...
Page 46 Units installation UNITS INSTALLATION 1.12. OPTIONAL ACCESSORIES 1.11. OPTIONAL ACCESSORIES – The maximum amount of fresh air intake is the 20% of 1.12.1. Indoor Unit Air Flow Rate. In the case that fresh air that 1.11.1. FRESH AIR INTAKE FOR 4-WAY CASSETTE 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 UNITS INSTALLATION 1.12.2. 1.12.3. 1.11.2. T-TUBE CONNECTING KIT FOR 4-WAY 1.11.3. BRANCH DISCHARGE FOR 4-WAY CASSETTE INDOOR UNITS (PDF-23C3; CASSETTE INDOOR UNITS (TKCI-232) 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 UNITS INSTALLATION 1.12.4. 2. Perform sufficient insulation treatment for the attachment 1.11.4. DIRECTION AIR FLOW FOR 4-WAY 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 UNITS INSTALLATION Specifications: The total height of the unit is increased by approximately 85 mm with the filter box installed. Therefore, pay attention Item For 4-way Cassette type to the installation space. For 4 Way Cassette Type RCI-1.0~6.0 Item Note that the packing dimension before compression is RCI-1.5~6.0...
Page 50 Units installation UNITS INSTALLATION To mount the filter, you need to use the Filter Box. Specifications: Item RCI-1.0~2.5 RCI-3.0~6.0 RCI-1.5~2.5 RCI-3.0~6.0 F-23L4-D F46-L4D 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...
Page 51 Piping installation Piping installation CONTENTS Piping installation ________________________________________________________ 2-1 2.1. General notes __________________________________________________________ 2-2 2.2. Piping work connection considerations _______________________________________ 2-3 2.2.1. Piping materials _________________________________________________________2-3 2.2.2. Three principles on refrigerant work __________________________________________2-4 2.2.3. Suspension of refrigerant piping _____________________________________________2-5 2.2.4. Tightening torque _________________________________________________________2-5 2.2.5 Brazing work ____________________________________________________________2-7 2.3.
Page 52 Piping installation DRAIN PIPING 2.1 GENERAL NOTES 2.1. GENERAL � � 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.
Page 53 Piping installation REFRIGERANT PIPING AND REFRIGERANT CHARGE 2.2 PIPING WORK CONNECTION CONSIDERATIONS 10.3. PIPING WORK CONNECTION CONSIDERATIONS 2.2.1 PIPING MATERIALS 10.3.1. PIPING MATERIALS - Refrigerant Pipes thickness are indicated in subchapter 10.3.4 1. Prepare locally-supplied copper pipes. Piping Connection Select the piping size with the correct thickness and �...
Page 54 Piping installation REFRIGERANT PIPING AND REFRIGERANT CHARGE Insulation � � NOTE: Attach insulation packet with Multi-Kit to each branch When polyethylene foam is applied, a thickness of utilizing vinyl tape. Also attach insulation to field supplied 10 mm for the liquid piping and 15 mm to 20 mm for piping for prevention of the capacity decrease according to the gas piping is recommended.
Page 55 Piping installation REFRIGERANT PIPING AND REFRIGERANT CHARGE REFRIGERANT PIPING AND REFRIGERANT CHARGE FSN Allen key Size (mm) 2.2.3. SUSPENSION OF REFRIGERANT PIPING 10.3.5. BRAZING WORK 2.2.4 BRAZING WORK The required tightening torque is as follows: 10.3.3. SUSPENSION OF REFRIGERANT PIPING Model Liquid Valve Gas Valve...
Page 56 Piping installation PIPING AND REFRIGERANT CHARGE 2.2.5. TIGHTENING TORQUE 12.1.4. TIGHTENING Tightening work on the flare nut Do not apply two spanners at this position Use two spanners here to squeeze flare nut Stop Valve Operation of stop valve should be performed according to the figure below. Size Tightening torque Valve...
Page 57 Piping installation REFRIGERANT PIPING AND REFRIGERANT CHARGE 2.3. INDOOR UNITS AND COMPLEMENTARY SYSTEMS 2.3.1 2.2. INDOOR UNITS 10.4. INDOOR UNIT PIPING WORK CONNECTION   Refrigerant piping Drain piping 10.4.1. RCI – 4 WAY CASSETTE TYPE 10.4.3. RPC – CEILING TYPE 2.2.1.
Page 58 Insulation for Connection Parts: The connection part must be insulated by the field supplied insulation materials. Piping installation Nitrogen: For Leakage Test and Brazing DRAIN PIPING CTION 2.3.2 RCIM 2.2. INDOOR UNITS   Refrigerant piping Drain piping 9.4.2. RCIM-4WAY CASSETTE TYPE 2.2.1.
Page 59 Piping size Piping installation mm (in) � Gas Piping � Liquid Piping Drain Piping RCI-1.0/1.5 Ø 12.70 (1/2) ∅ 6.35 (1/4) RCI-2.0 Piping size DRAIN PIPING ∅ 15.88 (5/8) ∅ 9.53 (3/8) RCI-2.5 2.3.3 mm (in) Gas Piping Liquid Piping ...
Page 60 Piping installation EFRIGERANT PIPING AND REFRIGERANT CHARGE REFRIGERANT PIPING AND REFRIGERANT CHARGE 2.3.4 CTION  Refrigerant piping After select the piping direction proceeded to knockout 10.4 10.4.3. RPC – CEILING TYPE selected hole, install pipes and seal the piping with the Piping position factory supplied insulation as indicated below: Posit...
Page 61 Piping installation  Drain piping – Insert the drain plug into the drain boss on the right – 2.2.4. side by using a driver as shown below. – The standard direction of drain pipe connection is to the Drain plug Drain connection right side looking at the unit from the discharge grilles.
Page 62 factory supplied insulation as indicated below: Position of piping connection is the following: Upper Side RPI (0.8~1.5) Piping installation � � 1. Knockout hole DRAIN PIPING Liquid Piping Drain Pipe Open the Knockout hole Gas Piping – Do not connect the drain pipe with the sanitary piping, the sewage piping or any other drainage piping.
Page 63 Drain piping position � Piping installation – The position of the drain pipe connection is shown in the next figures. DRAIN PIPING RPI-1.5  – Prepare a PVC pipe with an outer diameter of 32 mm Drain piping (RPI-0.8-6.0) or 25 mm (RPI 8/10). –...
Page 64 Piping installation REFRIGERANT PIPING AND REFRIGERANT CHARGE 2.3.6  Refrigerant piping When bending the tubes, firmly fix the tube at the heat 10.4.5. RPK – WALL TYPE exchanger side. Piping Direction for the Indoor Unit: � RPK-0.8 ~ 4.0 Three directions of piping connection to the Indoor Unit Contour of the Unit can be performed;...
Page 65 Piping installation  Drain piping 2.2.6. Right side connection Right side connection � – The standard direction of drain piping connection is to the right side when the unit is viewed from the discharge grilles. However, the connection can be performed from the left side or the rear side. Contour of the unit Ø...
Page 66 Gas Piping 1.0/1.5 Make a hole by removing the knock-out plate at the Liquid Piping 1.0/1.5 rear side. Piping installation Piping size mm (in) Gas Piping Liquid Piping RPK-0.8 ∅ 12.70 (1/2) � 2.3.6 RPF(I) ∅ 6.35 (1/4) CAUTION: RPK2.0 Do not twist the pipe when bending the tube.
Page 67 Piping installation PIPING AND REFRIGERANT CHARGE 2.4 OUTDOOR UNITS 2.4.1. FACTORY SUPPLIED PIPE ACCESSORIES Insulate Pipes 12.1.3. PIPING CONNECTION � 2.4.2. PIPING CONNECTION Insulate the refrigerant pipes as shown below Pipes can be connected from 4 directions. Make holes in Accessory Quantity the piping cover or cabinet for taking out pipes.
Page 68 Piping installation PIPING AND REFRIGERANT CHARGE � NOTE: (b) Bottom Side Piping Work After removing bottom of the piping cover, perform For connecting Ø25.4 pipe to RAS-8~12HRNM unit, use piping and wiring works. the pipe flange (factory-supplied) Liquid Piping Conduit Gas Piping Bottom Side Piping Hole Bottom Base...
Page 69 Piping installation 2.4.3. VACUUM AND REFRIGERANT CHARGE After ﬁnish the sumarized evacuation procedure, refrigerant charging procedure should be performed according to the next instructions: Insulation for piping 1. The stop valves have been closed before shipment, however, ensure that the stop valves are closed Insulate the gas piping and the liquid piping separately and wrap Gas piping...
Page 70 DRAIN PIPING Piping installation 14. DRAIN PIPING 2.4.4. DRAIN DISCHARGING BOSS 14.1. DRAIN DISCHARGING BOSS When the base of the outdoor unit is temporarily utilized as This drain boss is not sufficient to collect all the drain water. a drain receiver and the drain water in it is discharged, this If collecting drain water is completely required, provide a drain boss is utilized to connect the drain piping.
Page 71 Electrical wiring Electrical wiring This chapter describes the procedures that you must follow to create the electrical wiring connections for the Utopia IVX HRNM outdoor units and for the full range of Hitachi indoor units. CONTENTS ELECTRICAL WIRING ____________________________________________________ 3-1 3.1.
Page 72 Electrical wiring 3.1. GENERAL CHECK   ATTENTION: CAUTION: – Before installing the electrical wiring or before Tightly secure the wires with the cord clamp inside the performing a periodical check, turn OFF the main indoor unit. switch to the indoor unit and the outdoor unit. ...
Page 73 Electrical wiring 3.2.2. SETTING THE DIP SWITCHES FOR THE  NOTES OUTDOOR UNIT Continuous operation during 2 hours is performed without Thermo-OFF  Quantity and Position of Dip Switches The 3-minutes guard for compressor protection is The PCB in the outdoor unit is operated with 6 types of dip effective during the test run operation.
Page 74 Electrical wiring   DSW5: Transmission Setting of End Terminal DSW6: Power source setting / indvidual operation Resistance Voltage Setting position Before shipment, No. 1 pin of DSW5 is set at the 380~415V ON side. In the case that the outdoor units quantity in the same H-link is 2 or more, set No.
Page 75 1 and 2 of the TB1, the fuse on the PCB Setting before the shipment (400V) is blown out. Electrical wiring If that is the case, first connect the wiring to the TB1. Then, turn on #2. 3.3. ELECTRICAL WIRING FOR THE INDOOR UNIT 3.5.
Page 76 Earth Screw Electrical wiring Remote Control Switch Cable Transmission Wiring ELECTRICAL WIRING Power Source Wiring 3.3.1. ELECTRICAL WIRING CONNECTION 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.
Page 77 Electrical wiring ELECTRICAL WIRING RCIM (cont.) RCD units � 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 1.4.
Page 78 Electrical wiring 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...
Page 79 Electrical wiring ELECTRICAL WIRING  RPK Units The following picture provides further details of the wiring RPK units The following figure provides further details of the wiring � connection for RPK-2.0~4.0FSNM units: connection for RPK-1.5~4.0FSNM units: The electrical wiring connection for the indoor unit is shown in the following figures.
Page 80 Electrical wiring ELECTRICAL WIRING RPF\RPFI units � 3.3.2 3.5.2. SETTING THE DIP SWITCHES FOR THE INDOOR UNIT Remove the front panel and the side panel. – The wiring from the left-rear side to the RPF is shown � Quantity and position of the DIP switches below.
Page 81 Self-inspection function 1 2 3 4 5 6 7 8 Electrical wiring Room thermostat is used ELECTRICAL WIRING DSW7 1 2 3 4 5 6 7 8 Automatic operation when power ELECTRICAL WIRING supply is ON 1 2 3 4 5 6 7 8 RPK-FSN1M DSW2: optional functions setting (only RPK FSNM) �...
Page 82 DSW5: setting the refrigerant cycle number DSW7: Fuse Recover (RPK-FSN1M only) ELECTRICAL WIRING Setting the refrigerant cycle number is required. Electrical wiring No setting is required. Before the Before the shipment, all the setting positions are OFF. shipment, all the setting positions are (The refrigerant cycle number is 0).
Page 83 Electrical wiring ELECTRICAL WIRING KPI units (Total Heat Exchanger) The electrical wiring connection for the KPI unit is shown in the following figures. Through the wiring connection hole in the cabinet, connect the cable of the remote control switch or an optional extension cable to the connectors on the printed circuit board inside the electrical box.
Page 84 Electrical wiring ELECTRICAL WIRING Simultaneous operation (Set-Free + Total Heat Exchanger) Simultaneous operation (Set-Free + Total Heat Exchanger) POWER SUPPLY INDOOR UNIT INDOOR UNIT TOTAL HEAT EXCHANGER Simultaneous operation (Set-Free + Total Heat Exchanger) Example for PC-2H2 POWER SUPPLY INDOOR UNIT TOTAL HEAT EXCHANGER INDOOR UNIT PC-2H2...
Page 85 Electrical wiring ELECTRICAL WIRING 3.4. ELECTRICAL WIRING BETWEEN INDOOR UNIT AND OUTDOOR UNIT 15.4. ELECTRICAL WIRING BETWEEN INDOOR UNIT AND OUTDOOR UNIT Connect the electrical wires between the indoor unit and It can be also used Shielded pair wiring. the outdoor unit, as shown below. Shield shall be connected to earth only in one cable side.
Page 86 Electrical wiring  ATTENTION: - Pay attention to the connection of the operating line. Incorrect connection may cause the failure of PCB. Models: RAS-8HRNM RAS-10HRNM RAS-12HRNM No.0 System Outdoor Units No.1 System Outdoor Units Operating Line (Twisted Shielded Pair Cable or Shielded Cable) DC5V (Non-Pole Transmission, H-LINK System) Indoor unit...
Page 87 3. 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. 4. In the case that the power cables are connected in series, add each unit maximum current and select wires below.
Page 88 Electrical wiring 3.5.1. H_LINK SYSTEM  System Example of H-LINK There are two typical cases of using H-LINK system;  NOTE 1 Using H-LINK System with Air Conditioners only, and The H-LINK system cannot be applied to the cycle 2 Using H-LINK System with Air Conditioners with Central with the old unit models or with the units that have Control Device, and the system examples are as shown an old transmission.
Page 89 Electrical wiring (2) Using H-LINK System for air conditioning systems with DIP Switch setting of indoor PCB and Outdoor PCB. (CSNET WEB or PSC-5S). It is required to set DIP switches of every indoor unit and a central control device outdoor unit.
Page 90 Electrical wiring ELECTRICAL WIRING Internal layout � 3.5.2. PSC-5HR 3.4.3. PSC-5HR Terminal board Installation of PSC-5HR � for transmission Ring core Refer to "Installation & Operation Manual of PSC-5HR H-LINK DSW1 to the unit to (PMML 0094A)" for details concerning the safety Power source be connected summary and the installation work.
Page 91 Electrical wiring ELECTRICAL WIRING Fuse recovery setting Test run � � If the fuse is blown out, you can recover by setting the No. 2 pin of DSW1 (at CN1 side) at the ON side or by After completing the installation of the H-LINK, you need setting the No.
Page 92 Electrical wiring 3.5 ELECTRICAL WIRING DIAGRAMS This sub-chapter shows the Electrical Wiring Diagram for each unit of the new Hitachi HRNM Series. Unit model Page number RCI-1.0~6.0FSN1E RCIM-1.0~2.0FSN RCD-1.0~3.0FSN RCD-4.0~6.0FSN RPC-2.0~6.0FSNE RPI-2.0~6.0FSN1E 3-28 RPI-8.0/10.0FSNE 3-29 RPK-0.8/2.0FSNM 3-30 RPK-2.5/4.0FSNM 3-31 RPF(I)-1.0~2.5FSNE...
Page 93 Electrical wiring ELECTRICAL WIRING DIAGRAMS Page 3-23 SMGB0046 rev.0 - 03/2007...
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Page 105 Remote control switch installation This chapter describes the procedures that you must follow to install the optional remote control switches that work with the Set-Free FSN(E)/FXN(E)/FSVNE outdoor units and the full range of Hitachi indoor units. CONTENTS INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH ________________ 4-1 4.1.
Page 106 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 – DO NOT run any transmission cable and any distributor or your HITACHI dealer.
Page 107 Remote control switch installation 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:...
Page 108 Remote control switch installation 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 109 Remote control switch installation 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 110 Remote control switch installation 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...
Page 111 Remote control switch installation 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 If you are using the switch box: �...
Page 112 Remote control switch installation INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH There are optional cables of 0.75 mm² wire. The cables � 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 113 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 �...
Page 114 Remote control switch installation 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...
Page 115 Remote control switch installation INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH Otherwise, the display is the following: System layout � 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 116 Remote control switch installation INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH � � 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 117 Remote control switch installation INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH � 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 118 Remote control switch installation INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH 2. Simultaneous operation, pulse signal; simultaneous 4.3.5. INPUT/OUTPUT FUNCTION 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.
Page 119 Remote control switch installation 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 120 Remote control switch installation 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 121 Remote control switch installation INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH 2. Initialization 4.3.7. INITIALIZATION OF THE CENTRAL 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 122 Remote control switch installation 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 123 Remote control switch installation 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...
Page 124 Remote control switch installation 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 125 Remote control switch installation 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 126 Remote control switch installation 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 127 Remote control switch installation 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 128 Remote control switch installation 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 129 Remote control switch installation 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 130 Remote control switch installation 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 131 Remote control switch installation 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.
Page 132 Remote control switch installation 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.
Page 133 (*) 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 134 Remote control switch installation INSTALLATION OF THE OPTIONAL REMOTE CONTROL SWITCH 4.9.5. TEST RUN 4.9.6. MAINTENANCE AND SERVICE � Self-Inspection of the HARC-BX E � Setting the DIP switch In order to identify the abnormal operation of the HARC-BX E, 1.
Page 135 CSNET-WEB Remote control switch Installation & Operation Manual installation 4.10. CSNET WEB INTERFACE CONNECTION 1. Safety Summary   Caution Attention Do not connect voltage input to the control system before Install CSNET WEB away from possible sources of preparation for test run has been correctly completed. electromagnetic waves.
Page 136 Remote control switch CSNET-WEB installation Installation & Operation Manual 4.10.2. SPECIFICATIONS 3. Speciﬁcations Hardware Speciﬁcations Components Speciﬁcations Power supply AC 230 V 1~ ±10% (50Hz) Consumption 10W (maximum) Outer dimensions Width: 240 mm, Depth: 204 mm, Height: 74.5 mm Weight 1.94 kg Assembling conditions Indoors (in a control panel or desktop)
Page 137 Remote control switch CSNET-WEB installation Installation & Operation Manual    Caution: Danger: Attention: - The signals’ cables should be as - Always disconnect the power - Before applying power and turning short as possible. Keep a distance supply for CSNET-WEB when on CSNET-WEB you must ensure of more than 150 mm from other handling the machine, in order to...
Page 139 Control system Control system This chapter presents the control system ﬂowcharts for the RAS-HRNM series operations. CONTENTS CONTROL SYSTEM _____________________________________________________ 5-1 5.1. Device Control System ___________________________________________________ 5-2 5.2. Indoor Unit PCB ________________________________________________________ 5-4 5.2.1. Layout of the Printed Circuit Board for RCI ___________________________________ 5.2.2.
Page 140 Control system 5.1. DEVICE CONTROL SYSTEM Control subject Purpose Cooling operation Heating operation Defrost operation Control Frequency of The frequency Control is determined The frequency Control is determined Fixed frequency Inverter Compressor with the next parameters: with the next parameters: - Ratio (I.U.
Page 141 Control system The ﬁgure below shows the outline of the control system Thermistor for inlet Air Suction Gas Pressure Sensor Wireless remote Multiple signals Thermistor of Discharge Air Discharge Gas Pressure Sensor control switch Thermistor for Gas Pipe Thermistor for Ambient Temperature Single signals Thermistor for Liquid Pipe Discharge Gas Thermistor...
Page 142 Control system CONTROL SYSTEM CONTROL SYSTEM 5.2. INDOOR UNIT PCB 5.2. INDOOR UNIT PCB 5.2.1. LAYOUT OF THE PRINTED CIRCUIT BOARD FOR RCI 5.2.1. LAYOUT OF THE PRINTED CIRCUIT BOARD FOR RCI PCB drawing � PCB drawing � The PCB in the indoor unit operates with three types of The PCB in the indoor unit operates with three types of DIP switches, and one rotary switch.
Page 143 Control system CONTROL SYSTEM 5.2.2. LAYOUT OF THE PRINTED CIRCUIT BOARD FOR RCD CONTROL SYSTEM PCB drawing � The PCB in the indoor unit operates with four types of DIP switches, one sliding switch and one rotary switch. 5.2. INDOOR UNIT PCB The location is as follows: LED INDICATION 5.2.1.
Page 144 Control system 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 145 Control system 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...
Page 146 Control system 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 147 Control system CONTROL SYSTEM 5.3. COMPLEMENTARY SYSTEM 5.3.1. PCB drawing � LED INDICATION LED1 Green Power source for the PCB This LED indicates the transmission status LED2 Yellow between the indoor unit and the RCS This LED indicates the transmission status LED4 between the indoor unit and the outdoor unit...
Page 148 Control system 5.4. OUTDOOR UNITS PCB Led indication LED1 Power source for PCB1 SEG1 Normal condition: activated Abnormal condicion: deactivated DSW6 DSW1 LED2 Green This LED2 indicates the transmission LED2 PSW2 status between PCB1 and PCB3 Normal condition: flickering PSW1 PSW3 Abnormal condition: activated or DSW4...
Page 149 Control system CONTROL SYSTEM 5.5. 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 150 Control system Control system 5.6. STANDARD OPERATION SEQUENCE I.U.: Indoor Unit 5.6.1. COOLING OPERATION O.U.: Outdoor unit Temp. ≤ 55 ºC Power to Power to PCB in Power to CH : ON on the Top of O.U.: ON O.U.: ON Comp.
Page 151 Control system Control system 5.6.1. COOLING OPERATION (cont.) I.U.: Indoor Unit O.U.: Outdoor unit from 1 Stop of Inverter Stop of MC Temp. ≤ 55 ºC on the Top of Power to CH : ON Comp. > 60 ºC Power to CH : OFF Stop of MOF Power to Y52C: OFF Power to CMC: OFF...
Page 152 Control system Control system 5.6.2. DRY OPERATION I.U.: Indoor Unit O.U.: Outdoor unit Temp. ≤ 55 ºC Power to Power to CH : ON on the Top of O.U.: ON Comp. > 60 ºC Power to CH : OFF Auto-louver 0 Reset Start of Transmission between Power to...
Page 153 Control system Control system 5.6.2. DRY OPERATION (cont.) I.U.: Indoor Unit O.U.: Outdoor unit from 1 Stop of Inverter Stop of MC Temp. ≤ 55 ºC on the Top of Power to CH : ON Comp. > 60 ºC Power to CH : OFF Stop of MOF Power to Y52C: OFF Power to CMC: OFF...
Page 154 Control system Control system 5.6.3. HEATING OPERATION I.U.: Indoor Unit O.U.: Outdoor unit Temp. ≤ 55 ºC Power to Power to PCB in Power to CH : ON on the Top of O.U.: ON O.U.: ON Comp. > 60 ºC Power to CH : OFF Only for I.U.
Page 155 Control system Control system 5.6.3. HEATING OPERATION (cont.) I.U.: Indoor Unit O.U.: Outdoor unit from 1 Stop of Inverter Stop of MC Temp. ≤ 55 ºC on the Top of Power to CH : ON Comp. > 60 ºC Power to CH : OFF Stop of MOF Power to Y52C: OFF Power to CMC: OFF...
Page 156 Control system Control system 5.6.4. DEFROST OPERATION CONTROL Heating Operation Power to RVR: OFF Defrosting DEFROST Indication Start Condition Power to MIF: OFF Power to MOF: OFF Defrosting Operation Defrosting DEFROST Disappears Stop Condition Inverter Frequency of Power to MOF : ON Power to RVR: ON Comp.
Page 157 Control system Control system 5.7. STANDARD CONTROL FUNCTIONS 5.7.1. FREEZING PROTECTION CONTROL DURING COOLING PROCESS OR DRY OPERATION Power Supply Cooling or Dry Operation Is compressor operated for more than *30 min.? *) The judging time varies under the condition Cooling or Dry Operation Gas pipe surface...
Page 158 Control system Control system 5.7.2. PREVENTION CONTROL FOR EXCESSIVELY HIGH DISCHARGE GAS TEMPERATURE. CONTRO 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?
Page 159 Control system Control system 5.7.3. INDOOR UNIT ELECTRICAL EXPANSION VALVE CONTROL 1. After supplying power source, the electronic expansion Time Chart valve is completely closed in order to initialize its opening. Defrost 2. When the compressor is stopped, the electronic Heating expansion valve is completely closed to adjust its opening.
Page 160 Control system Control system 5.7.4. OUTDOOR UNIT ELECTRICAL EXPANSION VALVE CONTROL 1. After supplying power source, the electronic expansion valve is completely opened. 2. When the compressor is stopped, the electronic expansion valve is completely closed to adjust its opening. 3.
Page 161 Control system Control system 5.7.5. ACTUATION FOR PROTECTION DEVICE CONTROL Operation Excessively High Drain MD : ON FS : OFF Power to H2: OFF YH2 : Close Water Level “RUN” Light Flickers Alarm of I.U. PCB Excessively High Temp. MIF : Stop ITI : Open of I.U.
Page 162 Control system Control system 5.7.6. OUTDOOR FAN CONTROL DURING COOLING OPERATION  Operation NOTE: This sequence is for the standard operation 10 sec. 100% Air Flow Volume *1) Fan Step at Start Outdoor Temp. (Tao) Air Flow Ratio *1) Fan Step at Start Tao ≤...
Page 163 Control system Control system 5.7.7. OUTDOOR FAN CONTROL DURING HEATING OPERATION Inlet Air Temp. of Fan step: Indoor Unit (ºC) 30% area Operation 10 Sec. 100% Air Flow Volume Air Flow Ratio Air Flow Ratio: ≥ 100% 30% Area (1*) Outdoor Temperature (ºC) Air Flow Ratio 100% Air Flow Ratio 30%...
Page 164 Control system Control system 5.7.8. PREHEATING CONTROL OF COMPRESSOR Operation > 55ºC Temp. on the Top of Comp. ≤ 55ºC CH : ON < 60ºC Temp. on the Top of Comp. ≥ 60ºC CH : OFF 5.7.9. PREVENTION CONTROL FOR HIGH PRESSURE INCREASE 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.
Page 165 Available optional functions Available optional functions Contents 6.1. Indoor Units ____________________________________________________________ 6-2 6.1.1. Available ports ___________________________________________________________6-2 6.1.2. Conﬁguration ____________________________________________________________6-3 6.1.3. Description of optional input signals __________________________________________6-6 6.1.4. Description of optional output signals _________________________________________6-8 6.2. RPK(0.8~4.0)FSNM unit __________________________________________________ 6-9 6.2.1. Description of optional input signals _________________________________________6-10 6.2.2.
Page 166 Available optional functions Available optional functions 6.1. INDOOR UNITS The system has eight input and eight output optional  Output connections signals. Both signals are programmed in the PCB of the indoor unit: with the CN3 connector for the input signals and Indication Connections the CN7 and CN8 connectors for the output signals.
Page 167 Available optional functions Available optional functions 6.1.2. CONFIGURATION Available optional signals Indoor units have optional signals that are described in the following table. The conﬁguration of the signals is performed via remote control, except for RPK-(0.8~4.0)FSNM units where the conﬁguration is performed via DIP switches. ...
Page 168 Available optional functions  Optional output signals Indic. Output signal Application Remote Control Display Port (Output signal) Not Set Not Set CN7 or    Operation Signal This signal allows to control the status of the ma- CN7 or ...
Page 169 Available optional functions Available optional functions Programming with the PC-P1HE c. After selecting the indoor unit, leave the condition for 7 seconds or press the “CHECK” switch, the remote The optional signals are programmed using the remote control switch is changed to the optional setting mode. control switch.
Page 170 Available optional functions Available optional functions   Selection of other Indoor Unit Note: When in optional settings mode, press the “TEMP ” – When you use a ﬁeld-supplied room thermostat, select switch or the “TEMP ” switch, the condition of the the speciﬁed thermostat as explained below: remote control switch is changed so that the Indoor Unit Contactor Load: DC 12V...
Page 171 Available optional functions Available optional functions  Function 2 - Remote OFF of the unit () (pulse Time chart signal input) CN3 signal This is a remote OFF optional signal that uses the pulse signal. Connect the cabling and use the materials as shown in Control by means section 6.1.1.
Page 172 Available optional functions Available optional functions   Thermo-ON signal during the cooling process () Notes: You use this optional signal to pick up the Thermo-ON – The remote control thermistor cannot be used if a signal of the running compressor during the cooling remote temperature sensor is being used process.
Page 173 Available optional functions Available optional functions 6.2. RPK(0.8~4.0)FSNM UNIT The following table shows the optional input and output signals available for the RPK-(0.8~4.0FSNM) units. These Signals are set up using DIP switches Setting option Connector No. Wireless PC-P1HE optional Pin Nº DSW2 function Function 1 - remote ON/OFF of...
Page 174 Available optional functions Available optional functions 6.2.1. DESCRIPTION OF OPTIONAL INPUT  Function 2: Remote OFF of the unit () (pulse signal SIGNALS input) This is a remote OFF optional signal that uses the pulse  Function 1: Remote ON/OFF of the unit signal.
Page 175 Available optional functions Available optional functions   Setting of the cooling mode or the heating mode Control by means of the ﬁeld-supplied room thermostat By utilizing this function, the cooling or heating operation mode can be changed by giving a contact signal from the When operating with a ﬁeld supplied room thermostat outside to the unit.
Page 176 Available optional functions Available optional functions 6.2.2. DESCRIPTION OF OPTIONAL OUTPUT SIGNALS   Operation Signal Alarm Signal This optional signal is utilized to pick up the operation This optional signal is used to pick up the activation of signal. By means of this function, you can check the safety devices.
Page 177 Available optional functions Available optional functions 6.3. ECONOFRESH KIT The signal has the following control logic. The system has three optional input signals that are programmed in the PCB of the indoor unit by means of Connector Pin No. Sluice valve connector CN3 of the RPI unit.
Page 178 Available optional functions 6.4. HRNM OUTDOOR UNITS  Output connections The system has eight input and ﬁve output signals that are programmed in the PCB of the outdoor unit by means of Indication Connections connectors CN1 and CN2 for the input signals and CN7 for the output signal.
Page 179 Available optional functions 6.4.2. CONFIGURATION. Available optional signals HRNM units have the following signals that are described in the following table. These signals are set up through the PCB of the outdoor unit.  Input signals Ind. Input signal Application Port Nº...
Page 180 Available optional functions Programming The optional signals are programmed through the PCB of the outdoor unit. Setting of the optional signals Input setting 1 Factory setting   CN1, 1-2 The optional signals of the outdoor unit are set up from the PCB of the outdoor unit and push switches PSW1, PSW2 PSW1 and PSW3...
Page 181 Available optional functions  6.4.3. DESCRIPTION OF OPTIONAL INPUT Demand Thermo OFF () SIGNALS. This is an input function to control the maximum power that the compressor can consume. When this option is  Fixing Operation Mode (Heating / Cooling) turned on, the outdoor units are stopped completely, and This input function is ﬁxed in terminals CN1 or CN2 of the the indoor units go into THERMO-OFF.
Page 182 Available optional functions 6.4.4. DESCRIPTION OF OPTIONAL OUTPUT 6.4.5. OPTIONAL FUNCTIONS SIGNALS Programming The optional signals are programmed through the PCB of  Operation signal () the outdoor unit. This optional signal is utilized to pick up the operation sig- Setting of the optional signals nal.
Page 183 Available optional functions     Night shift Not Available   Fixing of demand Not Available   function PSW1 PSW1 SET* PSW2 PSW3 SET* PSW2 PSW3 Available  Available  Defrost condition Not Available   Wave function Not Available ...
Page 184 Available optional functions   Fixing of Demand Functionth Setting defrosting at low-speed This function regulates the running current of the outdoor By means of this option, you can select the speed of the unit. If the demanded current is above the set current, the indoor unit fan during the defrost period.
Page 185 Available optional functions   Change of defrost operation conditions Fixing of frequency This function allows to change the operation conditions in No setting for this function is available. defrosting mode. The change is shown in the following illustrations:  Cool Draft protection 1 This function can be activated, when the minimum discharge Normal Defrosting Condition...
Page 186 Available optional functions 6.5. OPTIONAL FUNCTIONS AVAILABLE THROUGH THE REMOTE CONTROL SWITCH 6.5.1. OPTIONAL FUNCTION SETTING  Note: The remote control switch is changed to the optional setting – The indoor unit can be selected among the indoor mode by the following procedures. units connected to the remote control switch.
Page 187 Available optional functions Setting items of the optional functions Item. Optional functions Setting Contents of parts Content Removal of Heating temperature Ca- Not Available This function is used to eliminate the  libration 4 °C shift. Available Circulator Function at Heating Ther- Not Available This function is to avoid the stratifica- ...
Page 188 Available optional functions Item. Optional functions Setting Contents of parts Content ON/OFF 1 unit Power supply Not Available This function retains the settings of  the unit if power supply is interrup- Available ted. The unit will start when power is restored.
Page 189 Available optional functions 6.5.2. OPTIONAL FUNCTIONS OF THE REMOTE (Indicated Setting Temperature = Suction Air Temperature –4 °C → Return to 0 °C) CONTROL SWITCH This is useful when the thermistor at the suction side 1. Removal of Heating Temperature Calibration () of an Indoor Unit is removed and installed into another This function is utilized when the temperature settings of place.
Page 190 Available optional functions This function is utilized to control the unit by the built-in 5. Fixing the operation mode () thermistor of the remote control switch (remote control This function is utilized when changes in operation thermistor) instead of the thermistor for suction air. modes are not required.
Page 191 Available optional functions Ventilation mode (KPI) ()  Note: This function is used to set the ventilation mode of the In case that the setting airﬂow mode by the remote total heat exchanger. control switch is “HIGH”, the airﬂow of the total heat exchanger is “HIGH”...
Page 192 Available optional functions Mode Lock () Heating temperature range limit () This function is utilized to lock the operation mode. This function is utilized to set the the temperature Range in heating mode. This function allows reducing the The setting condition is showing below Heating range, to conﬁgurate trough the remote control switch.
Page 193 Available optional functions 6.6. OPTIONAL FUNCTIONS AVAILABLE THROUGH THE REMOTE CONTROL SWITCH AVAILABLE OPTIONAL FUNCTIONS (PC-P5H) 6.7. OPTIONAL FUNCTIONS AVAILABLE THROUGH THE REMOTE CONTROL SWITCH (PC-P5H) Normal mode (when unit is not operating) Press the � ( ) � ( ) and �...
Page 194 Available optional functions AVAILABLE OPTIONAL FUNCTIONS 6.7. OPTIONAL FUNCTIONS AVAILABLE THROUGH WIRELESS REMOTE CONTROL SWITCH (PC-LH3A + RECEIVER) 6.8. OPTIONAL FUNCTIONS AVAILABLE THROUGH WIRELESS REMOTE CONTROL SWITCH (PC-LH3A + RECEIVER) You can adjust the following optional functions with the DIP PC-RLH9 �...
Page 195 Test run Test run CONTENTS TEST RUN _____________________________________________________________ 7-1 7.1. Checking Procedure before the Test Run _____________________________________ 7-2 7.2. Test Run Procedure by Means of the Remote Control Switch _____________________ 7-3 7.3. Test Run Procedure by Means of the Wireless Remote Control (PC-LH3A) ___________ 7-4 7.4.
Page 196 Test run When you have ﬁnished the installation, perform the test b. Make sure that the stop valves of the outdoor unit run according to the following procedure. After performing are fully open. Then, start the system. the test run, hand over the system to the customer. c.
Page 197 Test run 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 Set the TEST RUN mode by means of the remote control �...
Page 198 Test run TEST RUN 7.3. TEST RUN PROCEDURE BY MEANS OF THE WIRELESS REMOTE CONTROL (PC-LH3A) � 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 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 TEST RUNNING 7.4. TEST RUN PROCEDURE FROM THE OUTDOOR UNIT SIDE 17.2. TEST RUN FROM OUTDOOR UNIT SIDE The procedure of test run from outdoor unit side is � WARNING: indicated below. Setting of this DIP switch is TEST RUNNING available with the power source ON.
Page 201 Test run TEST RUN 7.5. CHECK LIST 7.6. TEST RUN AND MAINTENANCE RECORD  Check list on test run 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?
Page 202 Test run  Normal operation pressure You can check the excess or the deﬁciency of the refrigerant in comparision with the following charts and actual pressure Model: RAS-8HRNM measurement. Cooling Operation The following checking procedure is useful during test run and maintenance work. Discharge Pressure (MPa) Suction Pressure (MPa) ...
Page 203 Test run Model: RAS-10HRNM Cooling Operation Discharge Pressure (MPa) Suction Pressure (MPa)  Model RAS-10HRNM Cooling Operation Discharge Pressure Pd (MPa) Suction Pressure Ps (MPa) Outdoor Unit Temp. (DBºC) Outdoor Unit Temp. (DB Outdoor Unit Temp. (DBºC) Outdoor Unit Temp. (DB Heating Operation Indoor Unit Inlet Temp.
Page 204 Test run Model: RAS-12HRNM Cooling Operation Discharge Pressure (MPa) Suction Pressure (MPa)  Model RAS-12HRNM Cooling Operation Suction Pressure Ps (MPa) Discharge Pressure Pd (MPa) Outdoor Unit Temp. (DB Outdoor Unit Temp. (DBºC) Outdoor Unit Temp. (DB Outdoor Unit Temp. (DBºC) Indoor Unit Inlet Temp.
Page 205 Test run  CHECK LIST ON COMPRESSOR CLIENT: MODEL: DATE Serial No.: Production date: Checker: No. Check Item Check Method Result Remarks Is THM9 correctly connected? (1) Is wire of thermistor correctly connected by THM9: Discharge Gas viewing? Thermistor (2) Check to ensure the 7-segment indication of Td when comp.
Page 206 Test run  ADDITIONAL INFORMATION FOR “CHECK LIST ON COMPRESSOR” Check Item Additional Information (Mechanism of Compressor Failure) 1 & 2 the liquid refrigerant return volume to the compressor is controlled by the discharge gas temperature Td when compressor is operating. If Td thermistor is disconnected, the liquid refrigerant return volume will become small by detecting the temperature even if the actual discharge gas temperature is high.
Page 207 Troubleshooting Troubleshooting CONTENTS TROUBLESHOOTING ____________________________________________________ 8-1 8.1. Initial Troubleshooting ____________________________________________________ 8-2 8.1.1. Checking by Means of the 7-Segment Display _________________________________ 8.1.2. Failure of the Power Supply to the Indoor Unit and the Remote Control Switch ________ 8.1.3. Abnormal Transmission between the Remote Control Switch and the Indoor Unit ______ 8.1.4.
Page 208 Troubleshooting 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...
Page 209 Troubleshooting TROUBLESHOOTING 8.1.2. FAILURE OF THE POWER SUPPLY TO THE INDOOR UNIT AND THE REMOTE CONTROL SWITCH 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. �...
Page 210 Troubleshooting TROUBLESHOOTING 8.1.3. ABNORMAL TRANSMISSION BETWEEN THE REMOTE CONTROL SWITCH AND THE INDOOR UNIT 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)
Page 211 Troubleshooting TROUBLESHOOTING 8.1.4. ABNORMAL OPERATION OF THE DEVICES 8.1.5. ABNORMAL OPERATIONS 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...
Page 212 Troubleshooting 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 The Comp.
Page 213 Troubleshooting 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...
Page 214 Troubleshooting 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...
Page 215 Troubleshooting 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...
Page 216 Troubleshooting 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...
Page 217 Troubleshooting 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 218 Troubleshooting 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 219 Troubleshooting 8.2. TROUBLESHOOTING PROCEDURE Abnormal Refrigerant Abnormal Indoor Cycle No. Unit No. If the RUN LED ﬂickers for 2 seconds, there is a failure in the transmission between the Indoor Unit and the Remote Control Switch. Possible causes are: Indicated for a –...
Page 220 Troubleshooting Code Category Content of Abnormality Leading Cause Abnormality of Current Sensor for Inverter Failure of Control PCB, IPM or PCB2 Thermistor of Onverter Fin abnormality (For Loose connector, disconnected wire, short circuit Inverter Fin temp.) IPM or PCB2 Abnormality Protection Activation of IPM or PCB2 Inverter Failure of Compressor, clogging of Heat Exchanger.
Page 221 Troubleshooting 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 222 Troubleshooting Alarm code Activation of Safety Device in Outdoor Unit  (Except Alarm Code 41 and 42)  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 223 Troubleshooting 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 224 Troubleshooting 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...
Page 225 Troubleshooting 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 226 Troubleshooting TROUBLESHOOTING FSN(E)/FXN(E) Is DSW10-1P (terminal Is DSW5-1P (terminal Resistance on resistance) on PCB1 ON? Set it correctly PCB1) ON? FSVNE Is DSW5-1P (terminal resistance) on PCB1 ON? Is the voltage between Is the voltage between Is LED1 (red) on the fasten terminal "R1"...
Page 227 Troubleshooting 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...
Page 228 Troubleshooting Alarm code Abnormal transmission between Inverter PCB2 and Outdoor PCB1   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 229 Troubleshooting TROUBLESHOOTING Action Phenomenon Cause Check item (Turn OFF the main switch) Between control PCB and Between control PCB, ISPM Disconnected Inverter Check the continuity of and FANM wires, insufficient Replacing wires, repairing, wires. Check for looseness contacting or tightening screws and of the connection screws.
Page 230 Troubleshooting 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 231 Troubleshooting Alarm code Decrease of Discharge Gas Superheat   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 232 Troubleshooting Alarm code Excessively High Discharge Gas Temperature at 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 233 Troubleshooting 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 234 Troubleshooting 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 235 Troubleshooting 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 236 Troubleshooting 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 237 Troubleshooting 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 238 Troubleshooting 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 239 Troubleshooting 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 240 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 displayed on the display of the outdoor unit PCB.
Page 241 Troubleshooting 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 242 Troubleshooting 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 243 Troubleshooting Alarm code Incorrect Capacity Setting or Combined Capacity between Indoor Units and 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 244 Troubleshooting Alarm code Incorrect Indoor 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.
Page 245 Troubleshooting Alarm code Cooling Overload  (High Pressure Switch will be Activate)  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 Action Phenomenon Cause Check item (Turn OFF Main Switch) Clogging of Heat Exchanger? Remover clogging Check for dust on air filter Remove dust Insufficient Air Flow to Heat Exchanger of Outdoor Unit Check the service space Secure service space Check for speed: Outdoor Fan: Cooling...
Page 247 Troubleshooting Alarm code Heating Overload  (High Pressure Switch will be Activate)  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 Action Phenomenon Cause Check item (Turn OFF Main Switch) Reduce heat load or use a Calculate heat load. bigger unit. Check for hot air near the Make good circulation. ceiling. Excessively High Temp. Air to Indoor Unit Heat Exchanger Check for short circuited air.
Page 249 Troubleshooting Alarm code Activation to Protect System from Excessively Low Suction Pressure  (Protection from Vacuum Operation)  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 Action Phenomenon Cause Check item (Turn OFF Main Switch)  Faulty Freeze Protection Fault Check resistance. Replace thermistor if faulty.  Thermistor of Indoor Unit  Evaporating Repair wiring and connec- Thermistor of Incorrect Connection Check wiring to PCB. tions.
Page 251 Troubleshooting Alarm code Overcurrent Protection Activation  Turn OFF power and dis- connect U, V, W from com- Is there any cause of pressor terminals. Check the compres- Restart operation. instantaneous voltage Turn ON #1 of DSW1 on PCB2 sor. Does it trip soon? decrease? and restart.
Page 252 Troubleshooting 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 253 Troubleshooting Alarm code Protection Activation of IPM or PCB2   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.
Page 254 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.
Page 255 Troubleshooting Alarm code Abnormality of Fan Motor Protection (DC Fan Motor)   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.
Page 256 Troubleshooting 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.
Page 257 Troubleshooting TROUBLESHOOTING 8.2.3. TROUBLESHOOTING IN CHECK MODE Use the OK switch of the remote control in the following cases: 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 258 Troubleshooting 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.
Page 259 Troubleshooting TROUBLESHOOTING Heating Thermo-ON Alarm Thermo temp. of the Coding Thermo-ON Operation �� remote control switch Part name Relay PCB relay ↓ YH2: Relay for drain pump (MD) and/or Part name Dark RAS-8~12 RAS-3~6 dew heater (EHW). HRNE H(V)RNE Indication on micro-computer input /output 52H: Relay for electric heater (CEH)
Page 260 Troubleshooting 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 ��...
Page 261 Troubleshooting 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 262 Troubleshooting TROUBLESHOOTING Compressor pressure/frequency indication Corresponds to check mode 1 “” (1) For HN(V)E series: Discharge pressure �� for "��" to "��" , "��" is displayed (high) (x 0.1 MPa) Corresponds to check mode 1 “” ↓ Suction pressure (low) ��...
Page 263 Troubleshooting 8.2.4. TROUBLESHOOTING BY MEANS OF THE 7-SEGMENT DISPLAY  Simple checking by 7-segment display During auto-addressing, the following items can be checked using the outdoor Turn ON all Indoor Inits connected unit’s on-board 7-segment LED display. to the Outdoor Unit 1.
Page 264 Troubleshooting Cause of inverter stoppage (11) Cause of Indoor Unit stoppage (20) Indication Contents Indication Contents IPM error Operation OFF, Power OFF   Instantaneous Over Current Thermo-OFF   Inverter Fin Thermistor Protection Alarm   Activation Freeze Protection Overheating Protection Electronic Thermal Activation ...
Page 265 Troubleshooting 8.2.5 TROUBLESHOOTING BY MEANS OF THE FLASHING ALARM LEDS FOR RPK-FSNM The red LED located on the panel indicates the following alarms: Code Cause Indication Alarm 02 Unit protection This alarm is activated when the blinks sequence is two times ON/two seconds OFF Alarm 03 Transmission error This alarm is activated when the blinks sequence is three times ON/two seconds OFF...
Page 266 Troubleshooting  Protection Control Code on 7-Segment Display (1) Protection control code is displayed on 7-segment when a protection control is activated. (2) Protection control code is displayed while function is working, and goes out when released. (3) When several protection control are activated, code number with higher priority will be indicated (see below for the priority order).
Page 267 Troubleshooting  Activating Condition of Protection Control Code For following the conditions as the temperature change, etc., the control of frequency, etc. is performed to prevent the abnormal conditions by the protection control. The activating conditions of protection control are shown in the table below. Code Protection Control Activating Condition...
Page 268 Troubleshooting 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...
Page 269 Troubleshooting 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) for RPK-0.8~2.0FSNM or (CN25 and CN12) for RPK-2.5~4.0FSNM 2.
Page 270 Troubleshooting 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 271 Troubleshooting 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 272 Troubleshooting 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. � To check the abnormal operation on the indoor unit PCB �...
Page 273 Troubleshooting 8.3.4 Procedure of Checking Other Main Parts 1. High Voltage Discharge Work for Replacing Parts  WARNING Perform this high voltage discharge work to avoid an electric shock Procedure: a. Turn OFF the main switches and wait for three minutes. Check to ensure that no high voltage exists. If LED201 is ON after start-up and LED201 is OFF after turning OFF power source, the voltage will decrease lower than DC50V.
Page 274 TROUBLESHOOTING Troubleshooting Remove all the terminals of the transistor module before check. If items (a) to (d) are performing and the results are satisfactory, the transistor module is normal. Measure it under 1k� range of a tester. Do NOT use a digital tester. Remove all the terminals of the transistor module before check.
Page 275 TROUBLESHOOTING TROUBLESHOOTING (3) Checking Method of Diode Module (3) Checking Method of Diode Module Outer Appearance and Internal Circuit of Diode Module Outer Appearance and Internal Circuit of Diode Module Troubleshooting 3. Checking Method of Diode Module Outer appearance and internal circuit of diode module If items (a) to (d) are performing and the results are satisfactory, the diode module is normal.
Page 276 l. By touching the + side of the tester to the RB terminal of ISPM and the - side of the tester to N terminal of ISPM. If the resistance is more than 10 kΩ, it isnormal. Troubleshooting m. By touching the - side of the tester to the RB terminal of ISPM and the + side of the tester to N terminal of ISPM.
Page 277 Troubleshooting  Checking procedure for the electrical coil parts Abbreviations used for colors: Black Brown Yellow Green Blue Grey Orange White Silver Violet Fan motor for the Indoor Units: Indoor units Power con- Electrical wiring diagram Wiring No. Resistance (Ω) sumption RCI-1.0FSN1E 56 W...
Page 278 Troubleshooting Indoor units Power con- Electrical wiring diagram Wiring No. Resistance (Ω) sumption RPC-4.0FSNE 180 W 32.10 BLK - RED RPC-5.0FSNE 24.50 RED - YEL RPC-6.0FSNE 24.50 YEL - GRY 44.70 RED - WHT at 25 ºC RPI-2.0FSN1E 75.60 BLK - RED RPI-2.5FSN1E 12.80 RED -...
Page 279 Troubleshooting Indoor units Power con- Electrical wiring diagram Wiring No. Resistance (Ω) sumption RPK-0.8FSNM 20 W DC Motor — — RPK-1.0FSNM RPK-1.0FSN1M RPK-1.5FSNM RPK-1.5FSN1M RPK-2.0FSNM RPK-2.5FSNM 40 W RPK-3.0FSNM RPK-3.5FSNM 41 W RPK-4.0FSNM RPF(I)-1.0FSNE 28 W 231.70 BLK - RED RPF(I)-1.5FSNE 198.70 RED -...
Page 280 Troubleshooting Other parts Part name Unit models Model code Resistance (Ω) Drain up motor RCI-2.0~5FSN ADP-1403 256.00 at 20 ºC RCD2.0~56.0FSN KJV-1004 347.00 at 20 ºC Solenoid gas for gas bypass (3/8) RAS-8HRNM to 105-52-52 (50Hz) 1540.00 RAS-12HRNM at 20 ºC 105-52-51 (60Hz) 1250.00 at 20 ºC...
Page 281 Troubleshooting Checking procedure for the compressor CHECK LIST ON COMPRESSOR Client: Model: Date: Serial No. Production date: Checker: Check item Check method Result Remarks Is THM9 correctly connected? 1. Is wire of thermistor correctly connected by THM9: Discharge Gas viewing? Thermistor 2.
Page 282 Troubleshooting Additional Information for “CHECK LIST ON COMPRESSOR” Check item Additional information (mechanism of the compressor failure) 1 & 2 The liquid refrigerant return volume to the compressor is controlled by the discharge gas temperature Td when compressor is operating. If Td thermistor is disconnected, the liquid refrigerant return volume will become small by detecting the temperature even if the actual discharge gas temperature is high.
Page 283 Spare parts Spare parts Contents 9.1. Indoor Units ____________________________________________________________ 9-2 RCI-2.0~6.0FSN1E ______________________________________________________________ RCIM-2.0FSN ___________________________________________________________________ RCD-2.0~3.0FSN ________________________________________________________________ RCD-4.0~5.0FSN ________________________________________________________________ RPC-2.0~6.0FSNE _______________________________________________________________ RPI-2.0~6.0FSN1E _______________________________________________________________ RPI-8.0~10.0FSNE _______________________________________________________________ RPK-2.0FSNM __________________________________________________________________ RPK-2.5~4.0FSNM _____________________________________________________________ RPF-2.0~2.5FSNE _____________________________________________________________ RPFI-2.0~2.5FSNE _____________________________________________________________ 9.2. Outdoor Units __________________________________________________________ 9-13 RAS-8/10/12HRNM ______________________________________________________________9-13  WARNING This Spare part list can be updated without previous notiﬁcation.
Page 284 Spare parts 9.1. Indoor Units System Free - FSN(1)(E/M) RCI-2.0~6.0FSN1E PART NAME REMARKS (*) Electrical Parts U00A Terminal Board U00B Terminal Board U00C P-Spring Condenser Assy U15A Thermistor Air inlet U15B Thermistor Air outlet U15C Thermistor Gas pipe U15D Thermistor LIquid pipe Expansion Valve Air Filter...
Page 285 Spare parts RCIM-2.0FSN PART NAME REMARKS U04A Fuse 0.5A For Control Circuit U04B Fuse 5A For Power Source (*) Electrical Parts U15A Thermistor THM1 Air Inlet U15B Thermistor THM2 Air Outlet U15C Thermistor THM3 Freeze Protection U15D Thermistor THM5 Gas Expansion Valve Air Filter For Air Panel P-N23WAM...
Page 286 Spare parts RCD-2.0~3.0FSN Drawing Number: SPN200506 PART NAME REMAKS Fuse 5A for control circuit Capacitor 4/5 mF 440vac U15A Thermistor Thm1 air inlet U15B Thermistor Thm2 air outlet U15C Thermistor Thm3 freeze protection U15D Thermistor Thm5 gas Exp. valve Air ﬁlter For P-G23DWA1 Air grille (With air ﬁlter)
Page 287 Spare parts RCD-4.0~5.0FSN (*) Electrical Parts Drawing Number: SPN2005 PART NAME REMARKS Fuse 5A for control circuit U14A Capacitor 4mF 440vac U14B Capacitor 5mF 440vac U15A Thermistor Thm1 air inlet U15B Thermistor Thm2 air outlet U15C Thermistor Thm3 freeze protection U15D Thermistor Thm5 gas Exp.
Page 288 Spare parts RPC-2.0~6.0FSNE (*) Electrical Parts Drawing Number: EPN0454B PART NAME REMARKS PART NAME REMARKS Terminal Board Heat Exchanger Assembly Remote Control SW PC-P1HE (OPTIONAL) Coupling Capacitor 3µF/ 4µF/ 5µF/ 6µF/ U65A Spacer U15A Thermistor Liquid pipe (Freeze Protection) U65B Push Spacer U15B Thermistor...
Page 289 Spare parts RPI-2.0~6.0FSN1E Drawing Number: EPN0605A-1B PART NAME REMARKS PART NAME REMARKS Terminal Board Heat Exchanger Assembly Remote Control PC-P1HE (Optional) U65A Spacer For PCB Fixing U65B Push Spacer For PCB Fixing Capacitor 2.5µF, 8.0µF, 5.0µF, 3.15µF, U71A Drain Pump 6.3µF U71B Fan Motor...
Page 290 Spare parts RPI-8.0~10.0FSNE (*) Electrical Parts Drawing Number: EPN0523A PART NAME REMARKS PART NAME REMARKS Right Side Runner & Casing Terminal Board U37B Fan Casing Assy R (only) Fuse Heat Exchanger Assembly Exp. Valve Cord U65A Spacer For ﬁxing the PCB Capacitor 18µF / 25µF U71A...
Page 291 Spare parts RPK-2.0FSNM (*) Electrical Parts Drawing Number: SPN200312 PART NAME REMARKS Fuse 5A (For Control Circuit) U15A Thermistor Air Inlet U15B Thermistor Air Outlet U15C Thermistor Freeze Protection U15D Thermistor Exp.Valve Air Filter Fan Runner Heat Exchanger Assembly U71A Fan Motor DC30V, 20W U71B...
Page 292 Spare parts RPK-2.5~4.0FSNM (*) Electrical Parts Details (U85A) Drawing Number: SPN20051 PART NAME REMARKS U04A Fuse 5A (For Control Circuit) U04B Fuse 6A (For Fan Motor) U04C Fuse 0,5A (For Control Circuit) U15A Thermistor Air Inlet U15B Thermistor Air Outlet U15C Thermistor Freeze Protection U15D Thermistor...
Page 293 Spare parts RPF-2.0~2.5FSNE (*) Electrical Parts Drawing Number: EPN0457B-1B PART NAME REMARKS PART NAME REMARKS Terminal board Fan Casing Exp. Valve Cord Heat Exchanger Assembly Exp. Valve Cord U65A Spacer For ﬁxing PCB Capacitor 2µF / 4µF U65B Push Spacer For ﬁxing PCB U15A Thermistor...
Page 294 Spare parts RPFI-2.0~2.5FSNE (*) Electrical Parts PART NAME REMARKS Terminal board Drawing Number: EPN0457B-2B Exp. Valve Cord Exp. Valve Cord Capacitor 2µF / 4µF U15A Thermistor Inlet U15B Thermistor U15C Thermistor Liquid U15D Thermistor Outlet Expansion Valve Air Filter Runner Fan Casing Heat Exchanger Assembly...
Page 295 Spare parts LOCATION OF S LOCATION OF SPARE PARTS IN THE UNIT 9.2. Outdoor Units MODEL: RAS-8HRNM RAS-10HRNM RAS-12HRNM RAS-8/10/12HRNM Cycle and Structural parts  U77B U77E U30D U01B U40A U01A U40A U01C U77B U77A U30C U30B U27A U27B U77C U21A U21B U77D U30A...
Page 296 U14A ELECTRICAL EQU Spare parts <3� 380-415V/50Hz, ELECTRICAL EQUIPMENT Electrical parts U65D  ELECTRICAL EQUIPMENT MODEL: RAS-8HRNM RAS-10HRNM MODEL: RAS-8HRNM RAS-12HRNM RAS-10HRNM <3� 380-415V/50Hz, 3�� 380V/60Hz> RAS-12HRNM <3� 380-415V/50Hz, 3�� 380V/60Hz> U15D U74A U74A View from View from P U14A View from P U65C U14A...
Page 297 ELECTRICAL EQUIPMENT MODEL: RAS-8HRNM ELECTRICAL EQUIPMENT Spare parts ELECTRICAL EQUIPMENT RAS-10HRNM MODEL: RAS-8HRNM RAS-12HRNM MODEL: RAS-8HRNM RAS-10HRNM <3� 220V/60Hz> RAS-10HRNM RAS-12HRNM RAS-12HRNM <3� 220V/60Hz> Electrical parts (cont) ELECTRICAL EQUIPM  <3� 220V/60Hz> U82A <3� 380-415V/50Hz, 3�� 38 U82A U82A U74C U74C U74C U14A...
Page 298 Spare parts Parts list  Part Name Remarks Part Name Remarks U01A Pressure Sw High Pressure U65A Plastic Material U01B Pressure Sw For Control U65B Plastic Material U01C Pressure Sw Low Pressure U65C Plastic Material Fuse 40A - 60A U65D Plastic Material U14A Capacitor...
Page 299 Servicing Servicing CONTENTS SERVICING __________________________________________________________ 10-1 10.1. OUTDOOR UNIT RAS-FSVNE ____________________________________________ 10-3 10.2. RCI ________________________________________________________________ 10-19 10.2.1. Removing the long life ﬁlter ______________________________________________ 10-19 10.2.2. Removing the air intake grille ____________________________________________ 10-19 10.2.3. Removing the electrical box cover _________________________________________ 10-19 10.2.4.
Page 300 Servicing 10.7. RPK-1.5/2 ___________________________________________________________ 10-50 10.7.1. Removing the Air ﬁlter __________________________________________________ 10-50 10.7.2. Removing the front panel _______________________________________________ 10-50 10.7.3. Removing the motor for the automatic louver ________________________________ 10-51 10.7.4. Removing the thermistor for liquid pipe, gas pipe, discharged air and suction air ____ 10-51 10.7.5.
Page 301 atmosphere for long periods. If necessary, seal pipe ends using caps or tape. 2.1.1 Removing Service Cover Remove the main parts according to the following procedures. Remove the five fixing screws, slide the service To reassemble perform the procedures in reverse. cover downward and remove.
Page 302 TURN OFF all power source switches. 2.1.3 Removing Upper Cover (1) Remove eleven (11) screws fixing the upper cover and remove the upper cover upw Tool Phillips Screw Servicing Upper Cover  WARNING: TURN OFF all the main switches ■ REMOVING UPPER COVER 1.
Page 303 SERVICING Servicing SERVICING TURN OFF all power source switches.  WARNING: TURN OFF all the main switches 1.5 Removing Outdoor Fan Motor 1) Remove the service cover according to the item 2.1.1 “Removing Service Cover”. TURN OFF all power source switches. ■...
Page 304 (6) Fix the motor wire with the plastic tie or the cord clamp. If not, it may cause the discon fan. (7) Mount the rubber bush at the partition plate when inserting the motor wire through the If not, it may cause the disconnection to the fan motor lead wire. Servicing TURN OFF all power source s 2.1.6 Removing Compressor...
Page 305 SERVICING onnection to the e partition plate. TURN OFF all power source switches. Servicing  WARNING: TURN OFF all the main switches Thermistor Thermistor Holder Holder Holder Holder Thermistor Thermistor Thermistor Thermistor ﬁxing plate Fixing Plate Holder for Th Holder for on tube edge Thermistor Td Thermistor...
Page 306 Servicing SERVICING  WARNING: TURN OFF all the main switches 6. Remove the suction pipe and discharge pipe from the compressor. TURN OFF all power source switches. Isolate the wires and electrical components to protect from the burner ﬂame at brazing. (6) Remove the suction pipe and discharge pipe from the compressor.
Page 307 SERVICING Servicing TURN OFF all power source switches. 2.1.7 Removing High Pressure Switch and Pressure Switch for Control (1) Remove the service cover according to the item 2.1.1 “Removing Service Cover”.  (2) Collect the refrigerant from the check joint according to the item 2.1.6 “Removing Compressor”. WARNING: TURN OFF all the main switches (3) (a) Disconnect the fasten terminals.
Page 308 Servicing SERVICING  WARNING: TURN OFF all the main switches ■ OPENING ELECTRICAL BOX (P-MOUNTING TURN OFF all power source switches. PLATE) 1 Remove the service cover according to the item → 2.1.8 Opening Electrical Box (P-Mounting Plate) “Removing Service Cover”. (1) Remove the service cover according to the item 2.1.1 “Removing Service Cover”.
Page 309 SERVICING Servicing TURN OFF all power source switches.  WARNING: TURN OFF all the main switches 2.1.9 Removing Coils for Reversing Valve and Solenoid Valve (SVA1, SVA2 and SVF) (1) Remove the service cover according to the item 2.1.1 “Removing Service Cover”. ■...
Page 310 SERVICING Servicing  WARNING: TURN OFF all the main switches TURN OFF all power source switches. ■ REMOVING EXPANSION VALVE COIL 2.1.10 Removing Expansion Valve Coil 1. Remove the service cover according to the item → (1) Remove the service cover according to the item 2.1.1 “Removing Service Cover”. “Removing Service Cover”.
Page 311 (1) Remove the service cover and rear service panel according to the item 2.1.1 “Removing Service (8) Reassemble the parts in the reverse order of removing procedures. Cover” and the item 2.1.4 “Removing Lower Part of Service Panel and Rear Service Panel”. according to the item 2.1.9 “Removing Reversing Valve and Soleno (2) Collect the refrigerant from the check joint according to the item 2.1.6 “Removing Compressor”.
Page 312 Servicing SERVICING  WARNING: TURN OFF all the main switches ■ REMOVING SOLENOID VALVE 1. Remove the service cover and rear service panel according to the item → “Removing Service Cover” and TURN OFF all power source switches. the item → “Removing Lower Part of Service Panel and Rear Panel”.
Page 313 SERVICING TURN OFF all power source switches. 2.1.14 Removing Electrical Components Servicing Do not touch the electrical components.  When handling the PCB1, take care of not to use excessive force as this will cause damage. WARNING: TURN OFF all the main switches (1) Remove the service cover according to item 2.1.1 “Removing Service Cover”.
Page 314 Servicing  WARNING: TURN OFF all the main switches ■ REMOVING INVERTER COMPONENTS  DANGER: 1. Remove the service cover according to the item → Do not touch the electrical parts when LED201 (Red) “Removing Service Cover”. on the PCB2 is lit to prevent from an electrical shock. SERVICING 2.
Page 315 SERVICING Do not touch the any electrical parts during LED201 (Red) on PCB2 is ON. If touched, electric shock will occur. Servicing � Removing Diode Module and Transistor Module Check to ensure that LED201 (Red) of the PCB2 is off. (1) Disconnect all the wirings connected to the diode module as shown below.
Page 316 Servicing  WARNING: TURN OFF all the main switches ■ REMOVING OTHER ELECTRICAL COMPONENTS 1. Remove the service cover according to the item → “Removing Service Cover”. 2. Open the P-mounting plate by rotating 90 degrees to the left according to the item → “Opening Electrical Box (P- Mounting Plate).
Page 317 Servicing 10.2. RCI 4-Way Cassette 10.2.1. 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 318 Servicing 10.2.4. REMOVING THE OPTIONAL AIR PANEL (Electrical Box) 1. Remove the electrical box cover according to the item "Removing the Electrical Box Cover". Disconnect the connector CN17 for louver motor on the indoor PCB. 2. Remove the air intake grille from the optional air panel. Main PCB 3.
Page 319 Servicing 10.2.6. 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. 3. Remove the earth wire for the fan motor. (Only for 4, 5 and 6 HP). 4.
Page 320 Servicing 10.2.8. 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 321 Servicing  WARNING: TURN OFF all the main switches and disconnect the power supply from the unit. 10.2.11. REMOVING THE THERMISTOR FOR LIQUID (Up-close view of Thermistor Installation) PIPE AND GAS PIPE 1. Remove the optional air panel according to the item Fixing Plate of thermistor "Removing the Optional Air Panel".
Page 322 Servicing 6. Turn the lock nut by a few turn, and the drive part is separated Fig. 1 Expansion Valve from the screw and can be removed. 7. Prepare the new drive part for replacement (service part) with the position of the driver (drive screw) already adjusted. Pulse Motor ...
Page 323 Servicing SERVICING � WARNING: TURN OFF all the main switches 10.3. RCIM – FSN 10.5. RCIM – FSN 4-Way Cassette 10.3.1. 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.
Page 324 Servicing SERVICING � WARNING: TURN OFF all the main switches 10.3.4. 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...
Page 325 Servicing SERVICING � WARNING: TURN OFF all the main switches 10.3.5. 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 326 Servicing SERVICING � WARNING: TURN OFF all the main switches 10.3.7. 10.5.7. REMOVING THE PRINTED CIRCUIT BOARD (PCB) 1. Remove the air intake grille according to the "Removing the Power Air Intake Grille". transformer Holder 2. Remove the electrical box cover according to the item "Removing the Electrical Box Cover".
Page 327 Servicing SERVICING � WARNING: TURN OFF all the main switches 10.3.9. 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 328 Servicing SERVICING � WARNING: TURN OFF all the main switches 10.3.10. 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 329 Servicing SERVICING � WARNING: TURN OFF all the main switches 10.3.11. 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 330 Servicing SERVICING � 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 331 Servicing SERVICING � WARNING: TURN OFF all the main switches 10.3.12. 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 332 Servicing SERVICING � WARNING: TURN OFF all the main switches 10.4. RCD 10.6. RCD 2-way cassette 10.4.1. 10.6.1. REMOVING THE LONG-LIFE FILTER AND THE AIR INLET GRILLE Upper Part of Filter 1. The long-life filter is located inside of the air inlet grille. You Upper Part of Filter can open the air inlet grille by pushing the knob as shown Hinges...
Page 333 Servicing SERVICING � WARNING: TURN OFF all the main switches 10.4.4. 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.
Page 334 Servicing SERVICING � 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 335 Servicing SERVICING � WARNING: TURN OFF all the main switches 10.4.6. 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 336 Servicing SERVICING � WARNING: TURN OFF all the main switches 10.4.8. 10.6.8. REMOVING THE DRAIN PAN 1. Remove the air inlet grille according to the section RCD-2.0 to 3.0FSN RCD-1.0 to 3.0 FSN "Removing the Long-Life Filter and the Air Inlet Grille". RCD-1.5 to 3.0 FSN 2.
Page 337 Servicing SERVICING � WARNING: TURN OFF all the main switches 10.4.9. 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 Liquid Side Thermistor for 2.
Page 338 Servicing SERVICING � 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 Moto r Pulse Motor �...
Page 339 Servicing  WARNING: TURN OFF all the main switches 10.7. RPI - IN-THE-CEILING TYPE 10.5. RPI - IN-THE-CEILING TYPE RPI-2.0~6.0 FSN1E 10.5.1. REMOVING THE ELECTRICAL BOX AND ELECTRICAL PARTS 1. Remove Electrical Box cover, for accessing the electrical components. Electrical box cover location Electrical Box Electrical Box cover...
Page 340 Servicing  WARNING: TURN OFF all the main switches 10.5.3. REMOVING THE OUTLET AIR THERMISTOR  NOTE: To disconnect this component properly from the PCB, see the Electrical Wiring Diagram chapter of this Manual. Outlet Termistor 1. The thermistor is located on the outlet side as shown in the detail.
Page 341 Servicing  WARNING: TURN OFF all the main switches 10.5.5. REMOVING THE FAN PARTS  Parts list: (Fan Motor / Fan Casing / Runner). 1. Perform step 1 from point 10.7.2 of this chapter. 2. Remove the Tape located on the center of the Casing, push clousing lockers and remove the half part of the Casing.
Page 342 Servicing  WARNING: TURN OFF all the main switches 10.5.7. REMOVING THE FLOAT SWITCH   NOTE: To disconnect this component properly from the PCB, see the Electrical Wiring Diagram chapter of this Manual 1. Perform steps 1 and 2 from point 10.7.4 of this chapter. Float Switch location 2.
Page 343 Servicing SERVICING � WARNING: TURN OFF all the main switches 10.6. RPC 10.8. RPC Ceiling type 10.6.1. 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 344 Servicing SERVICING � 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 10.6.4. 10.8.4. REMOVING THE FAN MOTOR 1.
Page 345 Servicing SERVICING � 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 346 Servicing SERVICING � WARNING: TURN OFF all the main switches 10.6.7. 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.
Page 347 Servicing SERVICING � WARNING: TURN OFF all the main switches 10.6.9. 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.
Page 348 part of holder Servicing 10.7. RPK-2.0 10.9. RPK-1.5/2 10.7.1. 10.9.1. REMOVING THE AIR FILTER 1. Pull up the right side and the left side of the air inlet grille as shown in the figure. 2. Pull down the air filter after lifting the grille and remove the air filter from the hinge.
Page 349 Servicing SERVICING � WARNING: TURN OFF all the main switches 10.7.3. 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 350 Servicing SERVICING � WARNING: TURN OFF all the main switches 5. Removing the thermistor for the discharge air Vertical louver 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 351 Servicing SERVICING � WARNING: TURN OFF all the main switches 10.7.6. 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 352 Servicing SERVICING � 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 part of the heat exchanger forward, and then remove the Square hole heat exchanger.
Page 353 Servicing SERVICING � 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.
Page 354 Servicing SERVICING � 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 355 Servicing SERVICING � WARNING: TURN OFF all the main switches 10.8. RPK-2.5-4-0 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. SET TEMP.
Page 356 Servicing SERVICING � WARNING: TURN OFF all the main switches 10.8.1. 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 357 Servicing SERVICING � WARNING: TURN OFF all the main switches 10.8.2. 10.10.2. REMOVING THE THERMISTORS FOR LIQUID PIPE, GAS PIPE, DISCHARGE AIR AND SUCTION AIR Expansion 1. Remove the right side cover according to the section Expansion Valve “Removing right side cover”, and remove the suction air Valve grille.
Page 358 Servicing SERVICING � WARNING: TURN OFF all the main switches 10.8.3. 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 359 Servicing SERVICING � WARNING: TURN OFF all the main switches 10.8.4. 10.10.4. REMOVING THE ELECTRICAL BOX PANEL Connector for 1. Remove the right side cover according to the section Connector for Connector for Gas Fan Motor (CN29) Connector for Gas “Removing right side cover”, and remove the suction air and Freeze Protection Fan Motor (CN29)
Page 360 Servicing SERVICING � WARNING: TURN OFF all the main switches 10.8.5. 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 Pipe grille. Pipe Holder Holder 2.
Page 361 Servicing SERVICING � WARNING: TURN OFF all the main switches 10.8.6. 10.10.6. REMOVING THE FAN AND THE FAN MOTOR 1. Remove the heat exchanger according to the section “Removing the heat exchanger”. Screw Screw 2. Remove one screw and two catches at the cover of the Cover Cover upper side fan motor and remove the cover.
Page 362 Servicing SERVICING � WARNING: TURN OFF all the main switches 10.8.7. 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...
Page 363 Servicing SERVICING � WARNING: TURN OFF all the main switches 10.8.8. 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".
Page 364 Servicing SERVICING � 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 Moto r Pulse Motor Although the direction of the eccentric part of the motor is...
Page 365 Servicing SERVICING /100 � WARNING: TURN OFF all the main switches 10.9. RPF 10.12. RPF Floor Type Floor Type 10.9.1. REMOVING THE AIR INLET GRILLE 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.
Page 366 Servicing SERVICING /101 � WARNING: TURN OFF all the main switches 10.9.4. REMOVING THE FRONT PANEL 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 367 Servicing SERVICING /102 � 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 10.9.6. REMOVING THE PRINTED CIRCUIT BOARD 10.12.6.
Page 368 Servicing SERVICING /103 � WARNING: TURN OFF all the main switches 10.9.7. REMOVING THE THERMISTORS FOR 10.12.7. REMOVING THE THERMISTORS FOR LIQUID PIPE AND GAS PIPE LIQUID PIPE AND GAS PIPE 1. Remove the air inlet grille according to the section "Removing the Air Inlet Grille".
Page 369 Servicing SERVICING /104 � WARNING: TURN OFF all the main switches 3. Remove the front upper panel after removing the eleven fixing screws. Screw Front upper panel 10.10.3. REMOVING THE FAN MOTOR 10.13.3. REMOVING THE FAN MOTOR 1. Remove the air filter according to the section "Removing the Air Filter".
Page 370 TURN OFF all power source switches. OPTIONAL FUNCTION 2.8.1 Structure (2.8 Total Heat Exchanger) The structure of the total heat exchanger is as shown in the figure. Total Heat Exchanger When maintaining, use service access door of ceiling. Servicing TURN OFF all power source switches. ...
Page 371 OPTIONAL FUNCTION (2.8 Total Heat Exchanger) TURN OFF all power source switches. Servicing 2.8.3 Removing Air Filter and Total Heat Exchanger Element (1) Open the service cover by pulling the hinge. (2) Remove the air filter or total heat exchanger element. ...
Page 372 Servicing  WARNING: TURN OFF all the main switches Total heat exchanger element holder 10.11.4. REMOVING FAN MOTOR 1. Open the service cover by pulling the handle according to the item → “Removing Air Filter and Total Heat Exchager Element”. 2.
Page 373 Servicing SERVICING /105 � WARNING: TURN OFF all the main switches 10.12. CLEANING THE INDOOR HEAT EXCHANGER 10.14. CLEANING THE INDOOR HEAT EXCHANGER 10.12.1. REQUIRED TOOLS FOR CLEANING (FOR ALL INDOOR UNITS) 10.14.1. REQUIRED TOOLS FOR CLEANING (FOR ALL INDOOR UNITS) Tool Remarks Cleaning water pump...
Page 374 Servicing SERVICING /106 � 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 375 Servicing SERVICING /107 � WARNING: TURN OFF all the main switches 10.14.2. CLEANING THE 4-WAY CASSETTE 10.14.2. CLEANING THE 4-WAY CASSETTE INDOOR UNIT INDOOR UNIT Spread a vinyl sheet over the floor in order to protect � furniture and others from the cleaning water before doing this work.
Page 376 Servicing SERVICING /108 � 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 377 Servicing SERVICING /109 � 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 378 Servicing SERVICING /110 � 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 379 Servicing SERVICING /111 � 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. –...
Page 380 Servicing SERVICING /112 � WARNING: TURN OFF all the main switches 10.12.4. CLEANING THE WALL TYPE INDOOR UNIT 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.
Page 381 Servicing SERVICING /113 � 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 382 Servicing SERVICING /114 � 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 383 Servicing SERVICING /115 � 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 385 Main parts Main parts CONTENTS MAIN PARTS ___________________________________________________________11-1 11.1. Inverter _______________________________________________________________11-2 11.1.1. Speciﬁcations of Inverter _________________________________________________11-2 11.1.2. Inverter Time Chart ______________________________________________________11-4 11.1.3. Protective Function ______________________________________________________11-5 11.1.4. Overload Control _______________________________________________________11-6 11.2. AC Chopper ____________________________________________________________11-6 11.3. Thermistor _____________________________________________________________11-8 11.4. Electronic Expansion Valve _______________________________________________11-10 11.4.1 Electronic Expansion Valve for the Outdoor Unit _______________________________11-10 11.4.2.
Page 386 Main parts MAIN PARTS 10.1. INVERTER 11.1. INVERTER 10.1.1. SPECIFICATIONS OF INVERTER FSN(E)/FXN(E) 11.1.1. SPECIFICATIONS OF INVERTER Aplicable model RAS5~30FSN(E)/FXN(E) Aplicable model RAS-8~12HRNM Applicable Power Source 3 Phase, 380V, 415V 50/HZ Aplicable power source 3 Phase. 380V, 415V 50 Hz Input Voltage RAS5~30 FSN(E) 8~64A Input voltage...
Page 387 Main parts 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 Internal Protection IPM Transistor Module or ISPM (2) Instantaneous Overcurrent Trip (3) Instantaneous Overcurrent Trip...
Page 388 Main parts MAIN PARTS 11.1.2. INVERTER TIME CHART 10.1.3. 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.
Page 389 Main parts MAIN PARTS 11.1.3. PROTECTIVE FUNCTION 10.1.4. PROTECTIVE FUNCTION 4. Protection of IPM 1. Excessive High or Low Voltage for Inverter 4. Protection of Transistor Module and ISPM a) Level of Detection a) Level of Detection a) Level of Detection When some of the output terminals between “U”...
Page 390 Main parts MAIN PARTS MAIN PARTS 11.1.4. OVERLOAD CONTROL AC Chopper AC Chopper a) Level of Detection frequency when the output current decreases lower than When the output current exceeds 105% of the maximum Reduction of Electromagnetic Sound Reduction of Electromagnetic Sound 88% of the rated one.
Page 391 MAIN PARTS Main parts CAUTION (2) Structure b. 5.6A (For Indoor Units: RPI (3.0 to 5.0HP) Models) a. 2.1A (For Indoor Units: RCD, RPC and RPI (2.0 to 2.5HP) Models) 2. Structure CN201 a. 2.1A (For Indoor Units: RCD (2.0 to 2.5HP) Models) CAUTION b.
Page 392 MAIN PARTS Main parts MAIN PARTS 3.5.2 Thermistor for Outdoor Unit (1) Position of Thermistor 11.3. THERMISTOR 10.2. THERMISTOR Thermistors for the outdoor unit Thermistor for the discharge gas temperature Thermistor for Outdoor (THM8 for inverter compressors; THM9, THM12, Ambient Temperature THM13, THM14 and THM16 for constant speed compressors) Thermistor for...
Page 393 Main parts Thermistor for Evaporating (2) Thermistor for Upper Part Temperature of Compressor Temperature (For Prevention of Discharge Gas Overheating) a. A thermistor for the upper part temperature of Thermistor for upper part temperature of  the compressor is installed to prevent discharge compressor gas from overheating.
Page 394 Main parts MAIN PARTS 11.4. ELECTRONIC EXPANSION VALVE 10.3. ELECTRONIC EXPANSION VALVE 11.4.1. ELECTRONIC EXPANSION VALVE FOR THE OUTDOOR UNIT 10.3.1. 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...
Page 395 MAIN PARTS Main parts 11.4.2. ELECTRONIC EXPANSION VALVE FOR THE INDOOR UNIT 10.3.2. ELECTRONIC EXPANSION VALVE FOR THE INDOOR UNIT Micro-computer Pulse signal Pulse Motor 2-Phase permanent magnetic pulse motor Gear Control 0 to 2,000 pulse by 1 pulse Output Shaft Refrigerant flow control Lock Nut Bellows...
Page 396 MAIN PARTS MAIN PARTS High Pressure Protection Device If the discharge pressure is excessively high, the compressor and the component parts of the Main parts High Pressure Protection Device refrigeration cycle can be damaged. Therefore, in case that the discharge pressure is higher than 4.15MPa (R410A), the protection control is activated and the compressor is stopped.
Page 397 Main parts MAIN PARTS 11.6. NOISE FILTER (NF) Noise Filter (NF) The noise ﬁlter decreases the leakage of noise made by the MAIN PARTS inverter to the power supply side. Terminals indicated with “LOAD” are connected to the inverter side and terminals The noise filter decreases the leakage of noise made by the inverter to the power supply side.
Page 398 MAIN PARTS Capacitor (CB1, CB2) Main parts This part is used for changing the alternative current to the direct current for the inverter. Connect two capacitor in line and used. 11.7. CAPACITOR (CB1, CB2) RAS-8HRNM to RAS-12HRNM (380-415V/50Hz, 380V/60Hz) This part is used for changing the alternative current to the direct current for the inverter.
Page 399 Main parts MAIN PARTS 11.9. AUTO LOUVER MECHANISM 10.5. AUTO LOUVER MECHANISM 11.9.1. RCI (4-WAY CASSETTE TYPE) 10.5.1. RCI (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.
Page 400 Main parts MAIN PARTS 11.9.2. RCD (2-WAY CASSETTE TYPE) 10.5.2. 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...
Page 401 Main parts MAIN PARTS 11.9.3. RPC (CEILING TYPE) 10.5.3. RPC (CEILING TYPE) 1. Auto-Louver Operation (1) AS Motor 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 402 Main parts MAIN PARTS 11.10. SCROLL COMPRESSOR 10.6. SCROLL COMPRESSOR 11.10.1. RELIABLE MECHANISM FOR LOW VIBRATION AND LOW SOUND 10.6.1. 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. 11.10.2.
Page 403 Field work instruction Field work instruction CONTENTS FIELD WORK INSTRUCTION _____________________________________________ 12-1 12.1. Checking the Power Source and the Wiring Connection ________________________ 12-2 12.2. Burnt-Out Compressor Due to an Insufﬁcient Refrigerant Charge __________________ 12-2 12.3. Insufﬁcient Cooling Performance when a Long Piping Is Applied __________________ 12-3 12.4.
Page 404 Field work instruction FIELD WORK INSTRUCTION WARNING: TURN OFF all the main switches. 12.1. CHECKING THE POWER SOURCE AND THE WIRING CONNECTION 11.1. CHECKING THE POWER SOURCE AND THE WIRING CONNECTION Check the following items in the case of abnormal operation: Check item Procedure Is the breaker of the fuse cut out?
Page 405 Field work instruction FIELD WORK INSTRUCTION 12.3. INSUFFICIENT COOLING PERFORMANCE WHEN A LONG PIPING IS APPLIED 11.3. INSUFFICIENT COOLING PERFORMANCE WHEN A LONG PIPING IS APPLIED Question and answer for the field work � Example 2: Insufficient cooling performance when a long piping is applied Phenomenon Sufficient cooling was not available for an indoor unit that was located at the farthest position.
Page 406 Field work instruction FIELD WORK INSTRUCTION 12.5 ALARM CODE “31” 11.5. ALARM CODE "31" Question and answer for the field work � FIELD WORK INSTRUCTION Example 4: Alarm code "31" Phenomenon Alarm code "31" sometimes occurred and the system stopped. The combination of the indoor units and the outdoor unit was the following.
Page 407 Field work instruction FIELD WORK INSTRUCTION 12.7 GUIDELINE FOR SELECTING THE DRAIN PIPE FOR THE INDOOR UNIT 11.8. 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...
Page 408 Field work instruction FIELD WORK INSTRUCTION System A Outdoor unit System B Outdoor unit 12.8.3. COUNTERMEASURE FOR THE System A System B 11.9.3. COUNTERMEASURE FOR THE Refrigerant: 30kg Refrigerant: 35kg REFRIGERANT LEAKAGE ACCORDING REFRIGERANT LEAKAGE ACCORDING TO THE KHK STANDARD TO THE KHK STANDARD According to the KHK standards, you should arrange the facility as follows so that the refrigerant concentration will...
Page 409 Field work instruction FIELD WORK INSTRUCTION 12.10 SERVICE AND MAINTENANCE RECORD 11.11. 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.
Page 410 Field work instruction 12.11 SERVICE AND MAINTENANCE RECORD BY MEANS OF THE 7-SEGMENT DISPLAY Data Sheet for Checking by 7-Segment Display Customer’s Name: ____________________________ Date: ________________________ Outdoor Unit Model (Serial No. RAS- (Serial No. RAS- (Serial No. Operation Mode Test Run Start Time Data Collect Start Time Read Out Data from 7-Segment in Outdoor Unit Protection Control Code...
Page 411 Field work instruction 12.12. SERVICE AND MAINTENANCE RECORD BY REMOTE CONTROL SWITCH Data Sheet for Checking by Remote Control Switch Time I.U. Model I.U. Serial No. I.U. No. / Alarm Code Check Check 1 · 2 1 · 2 1 · 2 1 ·...
Page 413 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 ISO 14001 Certified by AENOR, Spain Hitachi Appliances, Inc.

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