Hitachi RAS-5HVRNM1E Service Manual
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Hitachi RAS-5HVRNM1E Service Manual

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UTOPIA DC-INVERTER IVX/ES SERIES
H(V)RN(1)(S)(1)(E)
H(V)RNM(1)(E)

Service Manual

RAS-(3-6)HVRNM(1)E
RAS-(4-12)HRNM(1)(E)
RAS-(2-3)HVRN(1)(E)(S)
RAS-(4-6)HVRNS1E
RAS-(8/10)HRNSE
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Summary of Contents for Hitachi RAS-5HVRNM1E

  • Page 1: Service Manual

    UTOPIA DC-INVERTER IVX/ES SERIES H(V)RN(1)(S)(1)(E) H(V)RNM(1)(E) Service Manual RAS-(3-6)HVRNM(1)E RAS-(4-12)HRNM(1)(E) RAS-(2-3)HVRN(1)(E)(S) RAS-(4-6)HVRNS1E RAS-(8/10)HRNSE niet in programma...
  • Page 3 Index I n d e x General information Unit Installation Piping work and refrigerant charge Electrical Wiring Control System Optional functions Test Run Troubleshooting Spare Parts Servicing Electrical checks of main parts Maintenace notes SMGB0060 rev. 1- 12/2010...
  • Page 4 Index SMGB0060 rev. 1- 12/2010...

  • Page 5: Table Of Contents

    Index Index General information..................General information........................1.1.1 Copyright............................. 1.1.2 Introduction..........................1.1.3 Environment-friendly units......................Safety............................1.2.1 Applied symbols.......................... Product guide ..........................1.3.1 Classification of IVX series outdoor unit models................. 1.3.2 Classification of ES series outdoor unit models................1.3.3 Product guide: Outdoor units...................... 1.3.4 Accessory code list........................
  • Page 6 Index 3.3.4 Twin and triple system installation....................3.3.5 Drain discharging boss....................... Outdoor Units ES Series......................3.4.1 Piping connection........................3.4.2 Refrigerant piping length......................3.4.3 Refrigerant piping selection......................3.4.4 Twin and triple system installation....................3.4.5 Connecting flare adapter (only for RAS-(2/2.5)HVRN1(E))............3.4.6 Drain discharging boss.......................
  • Page 7 Index 6.1.4 Description of optional output signals..................166 6.1.5 Optional functions........................167 Test Run......................173 Checking procedure before the test run..................174 Test run procedure using the remote control switch..............176 Test run procedure using the wireless remote control switch............ 178 Test run procedure from the outdoor unit side................
  • Page 8 Index 11.4 High pressure protection device....................448 11.5 Noise filter (NF).......................... 449 11.5.1 Noise filter for IVX Series......................449 11.5.2 Noise filter for ES Series......................450 11.6 Capacitor (CB1, CB2)......................... 452 11.7 Reactor (DCL)..........................453 11.7.1 Reactor (DCL) for IVX Series ..................... 453 11.7.2 Reactor (DCL) for ES Series ......................

  • Page 9: General Information

    1 General information . G e n e r a l i n f o r m a t i o n Index General information........................1.1.1 Copyright............................1.1.2 Introduction........................... 1.1.3 Environment-friendly units......................Safety............................1.2.1 Applied symbols..........................Product guide ..........................1.3.1 Classification of IVX series outdoor unit models................

  • Page 10: General Information

    No type of modification must be made to the equipment without prior, written authorisation from the manufacturer. 1.1.2 Introduction HITACHI offers the IVX and ES range of outdoor units, the main advantage of which is that they can be combined with UTOPIA series indoor units.

  • Page 11: Safety

    1 General information 1.2 Safety 1.2.1 Applied symbols During normal air conditioning system design work or unit installation, greater attention must be paid in certain situations requiring particular care in order to avoid damage to the unit, the installation or the building or property. Situations that jeopardise the safety of those in the surrounding area or that put the unit itself at risk will be clearly indicated in this manual.

  • Page 12: Product Guide

    1 General information 1.3 Product guide 1.3.1 Classification of IVX series outdoor unit models Unit type (Outdoor unit): RAS Position-separating hyphen (fixed) Capacity (HP): 3, 4, 5, 6, 8, 10, 12 H = Heat Pump V=Single fase(1~) R= Inverter system N=R410A refrigerant M=High Efficiency Series...

  • Page 13: Product Guide: Outdoor Units

    Unit Code Unit Code Unit Code RAS-3HVRNME 7E300005 RAS-4HVRNM1E 7E305007 RAS-4HRNM1E 7E305107 RAS-8HRNM 60278972 RAS-5HVRNM1E 7E305008 RAS-5HRNM1E 7E305108 RAS-10HRNM 60278973 RAS-6HVRNM1E 7E305009 RAS-6HRNM1E 7E305109 RAS-12HRNM 60278974 N O T E • Check the exact classification for each unit (model, type, power and series) in...

  • Page 14: Accessory Code List

    1 General information 1.3.4 Accessory code list HITACHI has a range of accessories and remote control systems that can be used with the UTOPIA outdoor units. Consult the Controls Technical Catalogue. Name Description Code Figure AG-335A Air outlet diffuser (one for each fan)

  • Page 15: Unit Installation

    2 Unit Installation . U n i t I n s t a l l a t i o n Index Safety summary......................... Transportation of outdoor unit....................Center of gravity......................... Factory-supplied accessories for RAS-(8-12)HRNM..............Installation space (Initial ckeck)....................2.5.1 RAS-(2-3)HVRN(1)(E)(S)......................2.5.2 RAS-(3-6)H(V)RNM(1)E / RAS-(4-10)HVRNS(1)E...............

  • Page 16: Safety Summary

    2 Unit Installation 2.1 Safety summary D A N G E R • Install the outdoor unit with sufficient clearance around it for operation and maintenance as shown in the next pages. • Install the outdoor unit where good ventilation is available. •...

  • Page 17: Transportation Of Outdoor Unit

    2 Unit Installation 2.2 Transportation of outdoor unit D A N G E R • Do not put any foreign material into the outdoor unit and check to ensure that none exists in the outdoor unit before the installation and test run. Otherwise, a fire or failure will occur. Hanging Method When hanging the unit, ensure the balance of the unit, check safety and lift it up smoothly.

  • Page 18: Center Of Gravity

    2 Unit Installation 2.3 Center of gravity Hanging Method When hanging the unit, ensure the balance of the unit, check safety and lift it up smoothly. Do not remove any packing materials and hang the unit under packing condition with two ropes, as shown below. At leat two persons are needed to move the unit.

  • Page 19: Factory-Supplied Accessories For Ras-(8-12)Hrnm

    2 Unit Installation 2.4 Factory-supplied accessories for RAS-(8-12)HRNM Make sure that the following accessories are packed with the unit. N O T E • If any of these accessories are not packed with the unit, please contact your dealer. Quantity Accessory Appearance RAS-8HRNM...

  • Page 20: Installation Space (Initial Ckeck)

    2 Unit Installation 2.5 Installation space (Initial ckeck) 2.5.1 RAS-(2-3)HVRN(1)(E)(S) Blocked in Inlet Side Upper Side Open Single Installation Multiple Installation (Two units or more) Pipe Cover Pipe Cover Ensure 250 mm or more of the side space on the pipe cover side. Allow 250 mm of space between units.

  • Page 21: Smgb0060 Rev. 1

    2 Unit Installation Blocked in Inlet Side The length A is as show in the following table: 0<L=1/2H 500 or greater 1/2H<L≤H 1000 or greater When L > H, use a base for outdoor unit to make L ≤ H. Close the base not to allow the outlet air bypassed.
  • Page 22 2 Unit Installation Lateral Side Blocked Upper Side Open Single Installation Pipe Cover Pipe Cover Ensure 250 mm or more of the side space on the pipe cover side. Ensure 250 mm or more of the side space on the pipe cover side. Upper Side Blocked Pipe Cover Pipe Cover...
  • Page 23 2 Unit Installation Single Installation Multiple Installation Blocked in Inlet Side Pipe Cover Pipe Cover Allow 250 mm of service space between units. Serial sideways installation allowed up to two units. Close the part A not to allow the outlet air bypassed. Install to avoid the Leave open both right and left sides.

  • Page 24: Ras-(3-6)H(V)Rnm(1)E / Ras-(4-10)Hvrns(1)E

    2 Unit Installation 2.5.2 RAS-(3-6)H(V)RNM(1)E / RAS-(4-10)HVRNS(1)E Blocked in Inlet Side Upper Side Open Single Installation Multiple Installation (Two units or more) 100 mm or more of the side space is acceptable on the service cover side. Allow 100 mm of space between units. Leave open both right and left sides. Dimensions in ( ) shows numbers especially for IVX 4-10 HP and ES Dimensions in ( ) shows numbers especially for IVX 4-10 HP and ES 8/10 HP.
  • Page 25 2 Unit Installation Blocked in Inlet Side The length A is as shown in the following table: 0 < L ≤ 1/2H 600 or greater 1/2H < L≤ H 1200 or greater Be sure to use the fan direction guide. Allow 100 mm of space between units. Leave open both right and left sides. Serial installation allowed up to two units.
  • Page 26 2 Unit Installation Lateral Side Blocked Upper Side Open Single Installation Upper Side Blocked Stack installation (allowed up to 2 Units) Upper Side Open Single Installation Multiple Installation Allow 100 mm of space between units. Serial sideways installation allowed Close the part A not to allow the outlet air bypassed. Install to avoid the up to two units.
  • Page 27 2 Unit Installation Multiple Installation in Multiple Rows Serial Installation in Multiple Rows (E.g. Rooftop) Allow approx. 100 mm of space from the side unit. Leave open both right and left sides. The length A is as shown in the following table: 0 <...

  • Page 28: Ras-(8-12)Hrnm

    2 Unit Installation 2.5.3 RAS-(8-12)HRNM Single installation Around sides are open Around sides are open with obstacles above Around sides are closed Around sides are open with obstacles above Multiple installation Around sides are open Multi-Row Around sides are open with obstacles above SMGB0060 rev.
  • Page 29 2 Unit Installation N O T E • All units are in mm. • Do not stack more than two units in the height. • If L is larger than H, mount the units on a base so that H is equal or greater than L. –...

  • Page 30: Place Provision

    2 Unit Installation 2.6 Place provision 2.6.1 Place provision for RAS-(3-12)H(V)RNM(1)(E) and RAS-(4-10)H(V)RNS(1)E ¿ Concrete foundation • Foundation could be on flat and it is recommended to be 100-300 mm higher than ground level. • Install a drainage around foundation for smooth drain. •...
  • Page 31 2 Unit Installation Recommended Metal Plate Size • (Field-Supplied) Material: Hot-Rolled Mild Steel. • Plate (SPHC) Plate Thickness: 4.5 T. ¿ Example of fixing outdoor unit by anchor bolts 1. Max. 21 mm (After cut “A”) 2. Concrete 3. Anchor bolt B.
  • Page 32 2 Unit Installation ¿ Suspended unit Suspend the unit as shown in the figures. Ensure that wall can withstand the weight of the outdoor unit indicated on the specifications plate. It is advisable that each foot support should bear the full weight of the unit (in order take account of applied stress fatigue when unit is operating).

  • Page 33: Place Provision Only For Ras-(2-3)Hvrn(1)(E)(S)

    2 Unit Installation ¿ Installing location where the unit will be exposed to strong wind Follow the instructions below to install on the roof or in a place which is not surrounded by buildings, and where the product may be buffeted by strong winds. Select a place where the input or outlet side of the product is exposed to strong winds.
  • Page 34 2 Unit Installation Example of fixing outdoor unit by anchor bolts. 1. Max. 17 mm (After cut “A”) 2. Concrete 3. Anchor bolt B: Cut this portion when this type of anchor bolt is used. If not done, it will be difficult to remove the service cover Provide an adequate drainage around the foundation.
  • Page 35 2 Unit Installation Installing location where the unit will be exposed to strong wind Follow the instructions below to install on the rooftop or a location without surrounding buildings, where strong wind is expected against the product. Choose a location where the outlet or inlet side of the product will not be exposed to strong wind.

  • Page 36: Optional Parts And Installation

    2 Unit Installation 2.7 Optional parts and installation 2.7.1 Optional parts and installation for RAS-(2-3)HVRN(1)(E)(S) ¿ Air flow guide, wind guard and snow protection hood Optional parts Model Air flow guide AG-264 Wind guard WSP-264 Air outlet ASG-NP80F Zinc Plate Air inlet of rear side ASG-NP56B Air inlet of side face...
  • Page 37 2 Unit Installation Locations of fixing holes The holes Location shall be made by using self-screws (M4x13) and later shall be used SUS screw (M5x12) for fixing air flow guide. Outdoor Unit Hole (4 locations) One flow guide installation Air discharge grille Air flow Outdoor unit M5 fixing screw x4 (Accessories)
  • Page 38 2 Unit Installation ¿ Wind guard Specifications Model WSP-264 Quantity 1 per unit Material Galvanized sheet metal + baked painting Color UTOPIA Beige Weight 4.0 kg Fixing screw x 4 [M5 (SUS) x 30]- Unit Accessories Fixing Screw x 10 [M5 (SUS) x 12]- Wind Ward Installation manual Installation “Guard net”, “Air flow guide”...
  • Page 39 2 Unit Installation ¿ Snow protection hood Air discharge hood Nº Part name Quantity Right side plate Left side plate Front panel Fixing screw (Accessories) Hole for safety wire rope to prevent overturning Rear suction hood Nº Part name Quantity Right side plate Left side plate Upper front panel (Upside)
  • Page 40 2 Unit Installation Attaching example of snow protection hood 1. Fixing screw (accessories) 2. Air inlet hood 3. Wire rope (optional for over turning protection) 4. Air discharge hood 5. Outdoor unit A. Rear side B. Left side C Front side N O T E •...

  • Page 41: Optional Parts And Installation Ras-3Hvrnme / Ras-(4-6)Hvrns1E

    2 Unit Installation 2.7.2 Optional parts and installation RAS-3HVRNME / RAS-(4-6)HVRNS1E ¿ Air flow guide, wind guard and snow protection hood Optional parts Model Air flow guide AG-335A Wind guard WSP-335A Air outlet ASG-NP335F Air inlet of rear side ASG-NP80B Zinc plate Air inlet of side face ASG-NP80L...
  • Page 42 2 Unit Installation One flow guide installation Air discharge grille Air flow Air flow guide Outdoor unit M5 fixing screw x4 (Accessories) Service space (In case of upward air discharge) • In case of right and left sides air discharge, enough space for air discharge is required.
  • Page 43 2 Unit Installation Attaching example of air wind guard • Attach the air flow guide to the air discharge grille with four (4) screws (supplied). • The fixing holes are located at 4 positions on the grille. (Screw tightening torque 2.4 ~ 3.1 N.m) •...
  • Page 44 2 Unit Installation Rear suction hood Nº Part name Quantity Right side plate Left side plate Upper front panel (Upside) Upper front panel (Downside) Fixing screw (Accessories) Hole for safety wire rope to prevent overturning Left suction hood Nº Part name Quantity Right side plate Left side plate...

  • Page 45: Optional Parts And Installation Ras-(4-6)H(V)Rnm1E / Ras-(8/10)Hrnse

    2 Unit Installation Specifications of snow protection hood Product name Air discharge hood Rear suction hood Left suction hood Model ASG-NP335F ASG-NP335FS2 ASG-NP80B ASG-NP160BS2 ASG-NP80L ASG-NP160LS2 Quantity 2 per unit 1 per unit Bonderized steel Bonderized steel Bonderized steel Stainless Stainless (NSSC Stainless (NSSC Material...
  • Page 46 2 Unit Installation ¿ Air flow guide Specifications Model AG-335A Image Quantity 2 per unit Air discharge Upward (downward), direction left & right Weather proof Material polypropylene resin Color Gray Weight 1.9 kg Fixing screw x 4 Accessories [M5 (SUS) x 20] Installation manual “Wind Guard”...
  • Page 47 2 Unit Installation Air flow guide Passage side ¿ Wind guard Specifications Model WSP-335A Quantity 2 per unit Galvanized sheet metal + Material baked painting Color Gray (1.0Y8.5/0.5) Weight 5.5 kg Fixing screw Accessories x 4 [M5 (SUS) x 12] Installation manual Installation “Guard net”, “Air flow guide”...
  • Page 48 2 Unit Installation Service space • Both sides of the outdoor unit should be open. • No obstacles should be placed in the air discharge side. Min. 200 mm Outdoor unit Wind guard ¿ Snow protection hood Air discharge hood Nº...
  • Page 49 2 Unit Installation Attaching example of snow protection hood 1. Left suction hood 2. Fixing screw (Accessories) 3. Rear suction hood Upper side 4. Wire rope (Optional. For overturning protection) 5. Rear suction hood Lower side 6. Air discharge hood 7.

  • Page 50: Optional Parts And Installation Ras-(8-12)Hrnm

    2 Unit Installation Specifications of snow protection hood Product name Air discharge hood Rear suction hood Left suction hood ASG- Model ASG-NP335F ASG-NP335FS2 ASG-NP280B ASG-NP280BS2 ASG-NP280L NP280LS2 Quantity 2 per unit 1 per unit Bonderized steel Bonderized steel Bonderized steel Stainless Stainless Stainless...
  • Page 51 2 Unit Installation ¿ Air flow guide Specifications Model AG-335A Quantity 2 per unit Air discharge Upward (downward), left & right direction Material Weather proof polypropylene resin Color Gray Weight 1.9 kg Fixing screw x 4 [M5 (SUS) x 20] Accessories Installation manual “Wind Guard”...
  • Page 52 2 Unit Installation Air flow guide Passage side ¿ Wind guard Specifications Model WSP-335A Quantity 2 per unit Galvanized sheet metal + Material baked painting Color Gray (1.0Y8.5/0.5) Weight 5.5 kg Fixing screw x 4 Accessories [M5 (SUS) x 12] Installation manual “Guard net”, “Air flow guide”...
  • Page 53 2 Unit Installation Service space • Both sides of the outdoor unit should be open. • No obstacles should be placed in the air discharge side. Min. 200 mm Outdoor unit Wind guard ¿ Snow protection hood Air discharge hood Nº...
  • Page 54 2 Unit Installation Left suction hood Nº Part name Quantity Right side plate Left side plate Front panel (upside) Front side (downside) Fixing hole x 2 Fixing screw (Accessories) Ø15 Attaching example of snow protection hood 1100 1. Left suction hood 2.
  • Page 55 2 Unit Installation B. Left side C. Rear side Specifications of snow protection hood Product name Air discharge hood Rear suction hood Left suction hood ASG- Model ASG-NP335F ASG-NP335FS2 ASG-NP335B ASG-NP335BS2 ASG-NP335L NP335LS2 Quantity 2 per unit 1 per unit Bonderized steel Bonderized steel Bonderized steel...
  • Page 56 2 Unit Installation SMGB0060 rev. 1- 12/2010...

  • Page 57: Piping Work And Refrigerant Charge

    3 Piping work and refrigerant charge . P i p i n g w o r k a n d r e f r i g e r a n t c h a r g e Index General notes..........................Piping work connection considerations..................

  • Page 58: General Notes

    3 Piping work and refrigerant charge 3.1 General notes C A U T I O N Do not install the drain-pipe in an up-slope position. Installing it like this, the drain water cannot be evacuated and will flow back to the unit, causing a possible leakage when the operation is stopped. Always install the unit higher than the exit of the pipe.
  • Page 59 3 Piping work and refrigerant charge Checking the unit without the drain-up mechanism Pour approximately 1.8 litres of water into the drain pan. Make sure that the water flows smoothly and that no water leakage occurs. If you cannot find water at the end of the drain pipe, once again pour approximately 1.8 litres of water into the drain pan.

  • Page 60: Piping Work Connection Considerations

    3 Piping work and refrigerant charge 3.2 Piping work connection considerations 3.2.1 Piping Materials In order to avoid supply problems in terms of local regulations and quality, prepare locally-supplied copper pipes. N O T E In case of using copper pipes for piping sections bigger than Ø19.05 mm (3/4 inches), flaring work cannot be performed.
  • Page 61 3 Piping work and refrigerant charge C A U T I O N • When inserting a pipe through any hole protect the end with a cap. • Do not put pipes on the ground directly without a cap or vinyl tape at the end of the pipe Correct Incorrect •...

  • Page 62: Three Principles On Refrigerant Piping Work

    3 Piping work and refrigerant charge 3.2.2 Three principles on refrigerant piping work In case of using refrigerant R410A in the refrigeration cycle, the refrigeration oil should be of a synthetic type one. In order to avoid oxidation, pay much careful attention to basic piping work control to avoid infiltration of moisture or dust during the refrigerant piping work.

  • Page 63: Brazing Work

    3 Piping work and refrigerant charge 3.2.4 Brazing work The most important work in the refrigerant piping installation work is the brazing of the pipes. If it accidentally occurs a leakage due to a careless brazing process, it will cause clogged capillary pipes or serious compressor failure. In order to guarantee a proper brazing neck between different pipes surfaces, accurate pipe dimensions after the expansion process (see the table below): It is important to control the clearance of the pipe fitting portion as shown below.

  • Page 64: Refrigerant Charge

    3 Piping work and refrigerant charge 3.2.5 Refrigerant charge C A U T I O N • Do not charge OXYGEN, ACETYLENE, or other flammable and poisonous gases into the refrigerant because an explosion will occur. It is recommended that oxygen free nitrogen be charged for these types of tests cycle when performing a leakage test or an airtight test.

  • Page 65: Refrigerant Charge Quantity

    3 Piping work and refrigerant charge 3.2.7 Refrigerant charge quantity ¿ Refrigerant charge quantity for IVX series Outdoor units has been charged with refrigerant for ℓ(m) of actual piping length. An additional refrigerant charged is required in systems with actual piping length longer than ℓ(m). Determine an additional refrigerant quantity according to the following procedure, and charge it into the system.
  • Page 66 3 Piping work and refrigerant charge ¿ Refrigerant charge quantity for ES series Outdoor units has been charged with refrigerant for ℓ(m) of actual piping length. An additional refrigerant charged is required in systems with actual piping length longer than ℓ(m). •...

  • Page 67: Pump Down Refrigerant

    3 Piping work and refrigerant charge 3.2.8 Pump down refrigerant When the refrigerant should be collected into the outdoor unit due to indoor/outdoor unit relocation, collect the refrigerant as follows: Attach the manifold gauge to the gas stop valve and the liquid stop valve. Turn ON the power source.

  • Page 68: Outdoor Units Ivx Series

    3 Piping work and refrigerant charge 3.3 Outdoor Units IVX Series 3.3.1 Piping connection For a list of factory-supplied accessories, please refer to Accessory code list, see on page 6. The pipes can be connected from any of the following four directions: front, rear, bottom or right side, when facing the outdoor unit.
  • Page 69 3 Piping work and refrigerant charge by cutting along the guideline at the rear of the cover or punching it with a driver. Remove the burr with a cutter. N O T E Hold the cover with a hand at the same time while removing the screws as the cover may fall down.
  • Page 70 3 Piping work and refrigerant charge To use racking or conduit tubes, check the size and remove the stiped parts, following the slit. N O T E Place insulation (field supplied) to protect cables and pipes from being damaged by plate edges. •...
  • Page 71 3 Piping work and refrigerant charge A. Insulation material. B. Field supplied. Operation of stop valve should be performed according to the figure. Description Remarks — Allen wrench Hex 4/5/10 mm Refrigerant Piping Field supplied — Refrigerant Pressure To outdoor unit Seat Surface Fully closed position Only the charging those can be...
  • Page 72 3 Piping work and refrigerant charge 1. Stop valve 2. Flare nut A. Do not apply two spanners at this position. If applied, leakage will occur C A U T I O N – At the test run, fully open the spindle. If not fully opened, the devices will be damaged.

  • Page 73: Refrigerant Piping Length

    3 Piping work and refrigerant charge 3.3.2 Refrigerant piping length The refrigerant piping between the indoor unit and the outdoor unit should be designed using the following table. • Piping length specification: Maximum piping length between Outdoor and each Maximum Height difference. Unit indoor unit (L) Outdoor unit is higher than indoor unit...

  • Page 74: Refrigerant Piping Selection

    3 Piping work and refrigerant charge N O T E • L & H are the length & height indicated in the above chart. • For twin, the length is the distance between the outdoor unit and the farthest indoor unit. •...

  • Page 75: Twin And Triple System Installation

    H(V)RNME Installing distributor Install the distributor supplied by HITACHI on request. A tee can not be installed instead of a branch pipe. Example: Twin system Installing the Distributor. Fix the branch pipe horizontally to the pillar, wall or celling. Piping must not be fixed rigidly to the wall as thermal expansion and contraction can cause pipe fracture.

  • Page 76: Drain Discharging Boss

    3 Piping work and refrigerant charge Correct position of twin distributor Correct position of twin branch pipe Wrong position of twin branch pipe A. Up. B. Greater than 0.5 m. C. Main pipe. A. Refrigerant direction D. Refrigerant direction. B. Main pipe E.
  • Page 77 3 Piping work and refrigerant charge Bottom base view 1. Drain pipe. 2. Extruded portion. 3. Drain boss. 4. Rubber cap. 5. Drain hole of base. SMGB0060 rev. 1- 12/2010...

  • Page 78: Outdoor Units Es Series

    3 Piping work and refrigerant charge 3.4 Outdoor Units ES Series 3.4.1 Piping connection For a list of factory-supplied accessories, please refer to Accessory code list, see on page 6. The pipes can be connected from any of the following four directions: front, rear, bottom or right side, when facing the outdoor unit.
  • Page 79 3 Piping work and refrigerant charge by cutting along the guideline at the rear of the cover or punching it with a driver. Remove the burr with a cutter. N O T E Hold the cover with a hand at the same time while removing the screws as the cover may fall down.
  • Page 80 3 Piping work and refrigerant charge • For the downward piping 1. Liquid piping. 2. Wiring. 3. Gas piping. 4. Knock-out hole. 5. Bottom base. N O T E The wiring must not be in contact directly with the pipes. •...
  • Page 81 3 Piping work and refrigerant charge B. Field supplied. Operation of stop valve should be performed according to the figure below. Closed before shipment Gas valve (RAS-(8/10)HRNSE) only — Allen wrench Hex 5 mm / 4 mm / 10 mm Refrigerant Piping Field supplied —...
  • Page 82 3 Piping work and refrigerant charge A. Do not apply two spanners at this position. If applied, leakage will occur. C A U T I O N – At the test run, fully open the spindle. If not fully opened, the devices will be damaged. –...

  • Page 83: Refrigerant Piping Length

    3 Piping work and refrigerant charge 3.4.2 Refrigerant piping length The refrigerant piping between the indoor unit and the outdoor unit should be designed using the following table. • Piping length specification: Maximum piping length between Outdoor Maximum Height difference. Outdoor unit is Unit and each indoor unit (L) higher than indoor unit/ Indoor unit is higher...

  • Page 84: Refrigerant Piping Selection

    3 Piping work and refrigerant charge The possible combination between Outdoor Unit and Indoor Unit are the following: Single System Twin System L= A + the longest of B & C Triple System Quad System L= A + (the longest of B + the longest of D & E) & (C + the L= A + the longest of B, C &...
  • Page 85 3 Piping work and refrigerant charge Piping connection size of outdoor unit, indoor unit and distributor Pipe Size Multikit & Distributor Outdoor Unit Liquid Piping Gas Piping Twin Triple Quad RAS-2HVRN1E — — — — — RAS-2.5HVRN1 — — — —...

  • Page 86: Twin And Triple System Installation

    HVRN(1)S(E) Installing distributor Install the distributor supplied by HITACHI on request. A tee can not be installed instead of a branch pipe. Example: Twin system Installing the distributor. Fix the branch pipe horizontally to the pillar, wall or ceiling. The piping must not be fixed rigidly to the wall as thermal expansion and contraction can cause pipe fracture.

  • Page 87: Connecting Flare Adapter (Only For Ras-(2/2.5)Hvrn1(E))

    3 Piping work and refrigerant charge Correct position of twin distributor Correct position of twin branch pipe Wrong position of twin branch pipe A. Up. B. Greater than 0.5 m. C. Main pipe. A. Refrigerant direction. D. Refrigerant direction. B. Main pipe. E.
  • Page 88 3 Piping work and refrigerant charge Connection procedure Insert the rubber cap into the drain boss up to the extruded portions. Insert the boss into the unit base and turn approximately 40 degree counterclockwise. The outer diameter section of the drain boss is 32 mm. A drain pipe should be field-supplied.

  • Page 89: Electrical Wiring

    4 Electrical Wiring . E l e c t r i c a l W i r i n g Index General check..........................Electrical wiring for the outdoor unit IVX Series................. 4.2.1 Electrical wiring connection for the outdoor unit................4.2.2 Setting the DIP switches for the outdoor unit................

  • Page 90: General Check

    4 Electrical Wiring 4.1 General check D A N G E R • Before installing the electrical wiring or before performing a periodical check, turn OFF the main switch to the indoor unit and the outdoor unit. For safety reasons, be sure that the indoor fan and the outdoor fan have stopped.

  • Page 91: Electrical Wiring For The Outdoor Unit Ivx Series

    4 Electrical Wiring 4.2 Electrical wiring for the outdoor unit IVX Series 4.2.1 Electrical wiring connection for the outdoor unit The correct electrical wiring connection for the outdoor unit is shown below. Insert the power source cables L1, L2, L3 and N (for 400V/50Hz) or L1 and N (for 230V/50Hz ) and the ground cable into the ring core, coiling them with two turns and fix the cables using the cable tie (accessory).

  • Page 92: Setting The Dip Switches For The Outdoor Unit

    4 Electrical Wiring Wiring System [Connection (Connection of Terminals)] [O.U.-O.U.(L1-L1, L2-L2, L3-L3, N-N)] Power Supply [I.U.-I.U.(L1-L1, N-N)] DC inverter Operating [O.U.-I.U., I.U.-I.U.(1-1, 2-2)] Remote Control [I.U.-I.U.(A-A, B-B)] N O T E • O.U.: Outdoor Unit • I.U.: Indoor Unit Connect the wires between the outdoor unit and the indoor unit to the terminals 1 and 2 on the terminal board. Do not run the wires in front of the fixing screw of the service access panel.
  • Page 93 4 Electrical Wiring Position of DIP switches (DSW) at the PCB1: RAS-(3-4)H(V)RNM(1)E RAS-(5-12)H(V)RNM(1)(E) N O T E • The mark “■” indicates the position of dips switches. • No mark “■” indicates pin position is not affecting. • The figures show the settings before shipment or after selection. D A N G E R •...
  • Page 94 Unit Setting position RAS-8HRNM RAS-3HVRNME RAS-4HRNM1E RAS-10HRNM RAS-4HVRNM1E RAS-5HRNM1E RAS-12HRNM RAS-5HVRNM1E RAS-6HRNM1E — — RAS-6HVRNM1E — — DSW4 / RSW1: Refrigerant cycle setting In case of using an H-Link II net it is required to set the refrigerant cycle number.
  • Page 95 4 Electrical Wiring DSW5: Transmission setting of end terminal resistance • Before shipment, No. 1 pin of DSW5 is set at ON. • In case of having 2 or more outdoor units connected to the same H-link, set for the second unit the pin number 1 of DSW5 at OFF.

  • Page 96: Electrical Wiring For The Outdoor Unit Es Series

    4 Electrical Wiring 4.3 Electrical wiring for the outdoor unit ES Series 4.3.1 Electrical wiring connection for the outdoor unit The correct electrical wiring connection for the outdoor unit is shown below. Insert the power source cables L1 and N (for 230V/50Hz ) and the ground cable into the ring core, coiling them with two turns and fix the cables using the cable tie (accessory).

  • Page 97: Setting The Dip Switches For The Outdoor Unit

    4 Electrical Wiring [Connection (Connection of Terminals)] for [Connection (Connection of Terminals)] for Wiring System RAS-(2-6)HVRN(1)(S)(E) RAS-(8/10)HRNSE Power Supply [O.U.-O.U.(L1-L1, N-N)] [O.U.-O.U.(L1-L1, L2-L2, L3-L3, N-N)] Operating DC inverter [O.U.-I.U., I.U.-I.U.(1-1, 2-2)] [O.U.-I.U., I.U.-I.U.(1-1, 2-2)] Remote Control [I.U.-I.U.(A-A, B-B)] [I.U.-I.U.(A-A, B-B)] N O T E •...
  • Page 98 4 Electrical Wiring Position of DIP switches (DSW) at the PCB1: RAS-(4-6)HVRNS1E RAS-(8/10)HRNSE N O T E • The mark “■” indicates the position of dips switches. • No mark “■” indicates pin position is not affecting. • The figures show the settings before shipment or after selection. A T T E N T I O N •...
  • Page 99 4 Electrical Wiring DSW2: Piping length/selection function Function Setting position Setting before shipment 5 m < Lt Piping length Lt > 30 m 5 m < Lt < 30 m Cancellation of outdoor hot start control. (Not recommended, only available for special testing cases ) RAS-(2/6)HVRN(1)(S)(E) Cancellation of outdoor air temperature control.
  • Page 100 4 Electrical Wiring DSW5: Transmission setting of end terminal resistance • Before shipment, No. 1 pin of DSW5 is set at ON. • In case of having 2 or more outdoor units connected to the same H-link, set for the second unit the pin number 1 of DSW5 at OFF.

  • Page 101: Electrical Wiring Between Indoor Unit And Outdoor Unit

    4 Electrical Wiring 4.4 Electrical wiring between indoor unit and outdoor unit Connect the electrical wires between the indoor unit and the outdoor unit, as shown in next figure. Double-check that the terminal for power source wiring (terminals “L1” to “L1”, “L2” to “L2”, “L3” to “L3” and “N” to “N” of each terminal board: AC380-415 V) and the intermediate wires (Operating line: terminals “1”...
  • Page 102 4 Electrical Wiring Power source from the outdoor unit Independent power source of outdoor unit to the indoor unit and indoor unit Outdoor unit Outdoor unit of system no. 0 of system no. 0 Operating line Operating line (shielded twisted pair cable (twisted shielded pair cable or shielded pair cable) or shielded pair cable)

  • Page 103: Wire Sizes

    EN60 335-1 (2*) All Indoor Units (1*) 0.75 mm 230V/1φ/50Hz RPI-8-10 1.5 mm RAS-3HVRNME 2.5 mm RAS-4HVRNM1E 18/24 4.0 mm 230V/1φ/50Hz RAS-5HVRNM1E 6.0 mm RAS-6HVRNM1E 6.0 mm 0.75 mm RAS-4HRNM1E 2.5 mm RAS-5HRNM1E 2.5 mm RAS-6HRNM1E 2.5 mm 400V/3φ/50Hz RAS-8HRNME 13.2...
  • Page 104 Select the main switches (current breaker) in according to the next table: Model Power Source Max. Current (A) CB (A) ELB (no. poles/A/Ma) All Indoor Units (1*) 230V/1φ/50Hz RPI-8-10 RAS-3HVRNME 2/40/30 RAS-4HVRNM1E 18/24 230V/1φ/50Hz RAS-5HVRNM1E RAS-6HVRNM1E RAS-4HRNM1E RAS-5HRNM1E RAS-6HRNM1E 400V/3φ/50Hz 4/40/30 RAS-8HRNM 13.2 RAS-10HRNM 17.1 RAS-12HRNM 21.2 N O T E •...

  • Page 105: Wire Sizes For Es Series

    4 Electrical Wiring 4.5.2 Wire sizes for ES Series Field minimum wire sizes for the power source Power Source Cable Size Transmitting Cable Size Model Power Source Max. Current (A) EN60 335-1 (2*) EN60 335-1 (2*) All Indoor Units (1*) 0.75 mm RAS-2HVRN1E 1.5 mm...

  • Page 106: H-Link System

    4 Electrical Wiring Wire size in relationship to the intensity In case that the power cables are connected in series, add each unit maximum current and select according to the next table. Selection according to Selection according to EN60 335-1 LFC (at cable Temp.
  • Page 107 4 Electrical Wiring It is possible to connect the new Hitachi outdoor units RAS-H(V)RNM(1)(E) for IVX and RAS-H(V)RN(1)(S)(E) with indoor units FSN1(E) and FSN2(E). Is is also possible to connect new indoor units FSN2(E) with outdoor units RAS-H(V)RNE/ H(V)NE and RAS-HVRN(1)(S)(E). The new H-Link II system operates with newer remote controlers, as PC-P2HTE.
  • Page 108 4 Electrical Wiring Examples with H-LINK Y H-LINK II systems System with indoor units, outdoor units, remote control and central control type H-LINK II Range number of refrigerant circuits 0-63 Range number of indoor units 0-63 Max. number of indoor units Max.
  • Page 109 4 Electrical Wiring System with indoor units, outdoor units, H-LINK remote controls and H-LINK II with H-LINK II central control. Range number of refrigerant 0-15 0-15 0-63 circuits Range number of indoor units 0-15 0-15 0-63 0-63 Max. number of indoor units Max.
  • Page 110 4 Electrical Wiring The following settings are not available: N O T E • It is not possible to connect diferent indoor units from diferent systems with the same remote control, once the remote control function wiring has been selected not to be used. •...
  • Page 111 4 Electrical Wiring H-LINK II specifications: • Transmission wire: 2-wire • Polarity of transmission wire: non-polar wire • Maximum outdoor units that can be connected: 64 units per H-LINK system. • Maximum indoor units that can be connected: 4 units per cycle and 160 units per H-LINK II system (in case of SET FREE series will be added).
  • Page 112 4 Electrical Wiring System example of H-LINK II There are two typical cases of using H-LINK system: Using H-LINK system with air conditioners only Using H-LINK system with air conditioners with a central control device. The system examples are shown below. Using H-LINK system for air conditioning systems without a central control device (CSNET WEB or PSC-5S).
  • Page 113 4 Electrical Wiring Using an H-LINK II system for air conditioning systems with a central control panel (CSNET WEB or PSC-64S). In case of using a central control panel, you must connect the H-Link II wiring to all the systems. The easiest way of connection to the H-LINK II system is usually to connect the available outdoor units.
  • Page 114 4 Electrical Wiring DIP Switch setting of indoor PCB and Outdoor PCB It is required to set DIP switches of every indoor unit and outdoor unit. SMGB0060 rev. 1- 12/2010...
  • Page 115 4 Electrical Wiring Connection example between H-LINK and H-LINK II units In case of mixed H-LINK and H-LINK II systems, set H-LINK units in the first 16 system positions, as shown in the following figure. There are 42 systems, 16 with FSN1E indoor units type and 26 with FSN2E indoor units type. N O T E •...

  • Page 116: Electrical Wiring Diagrams

    4 Electrical Wiring 4.6 Electrical wiring diagrams 4.6.1 Electrical wiring diagrams for IVX Series RAS-3HVRNME C110 Q203 Q204 CP21 CP22 C208 C105 C109 CP13 R112 CP19 C108 LED201 ê‘ C104 CP14 CP23 Lot No. C100 R113 R109 R114 CP18 CP15 LED202 CP27 R110...
  • Page 117 4 Electrical Wiring RAS-(4-6)HVRNM1E SMGB0060 rev. 1- 12/2010...
  • Page 118 4 Electrical Wiring RAS-(4-6)HRNM1E SMGB0060 rev. 1- 12/2010...
  • Page 119 4 Electrical Wiring RAS-(8-12)HRNM SMGB0060 rev. 1- 12/2010...

  • Page 120: Electrical Wiring Diagrams For Es Series

    4 Electrical Wiring 4.6.2 Electrical wiring diagrams for ES Series RAS-(2/2.5)HVRN1(E) SMGB0060 rev. 1- 12/2010...
  • Page 121 4 Electrical Wiring RAS-3HVRNS SMGB0060 rev. 1- 12/2010...
  • Page 122 4 Electrical Wiring RAS-(4-6)HVRNS1E SMGB0060 rev. 1- 12/2010...
  • Page 123 4 Electrical Wiring RAS-(8/10)HRNSE SMGB0060 rev. 1- 12/2010...
  • Page 124 4 Electrical Wiring SMGB0060 rev. 1- 12/2010...

  • Page 125: Control System

    5 Control System . C o n t r o l S y s t e m Index Device control system........................ 5.1.1 Device control system for IVX Series.................... 118 5.1.2 Device control system for ES Series..................... 120 Outdoor units PCB........................5.2.1 Outdoor units PCB for IVX Series....................

  • Page 126: Device Control System

    5 Control System 5.1 Device control system 5.1.1 Device control system for IVX Series Purpose Control subject Cooling operation Heating operation Defrost operation The frequency control is determined The frequency control is Fixed frequency (stop compressor with the next parameters: determined with the next during 30 sec.
  • Page 127 5 Control System • Cap: Capacity • Temp.: Temperature The figure below shows the outline of the control system Multiple signals Single signals Wireless remote control switch Thermistor for inlet air Suction gas pressure sensor Thermistor of discharge air Discharge gas pressure sensor Operation signals Thermistor for gas pipe Thermistor for outdoor temperature...

  • Page 128: Device Control System For Es Series

    5 Control System 5.1.2 Device control system for ES Series Purpose Control subject Cooling operation Heating operation Defrost operation The frequency control is determined The frequency control is with the next parameters: determined with the next • Temperature difference parameters: Fixed frequency (stop compressor between air inlet temperature •...
  • Page 129 5 Control System The figure below shows the outline of the control system Symbol Name Symbol Name Motor (for compressor) Current transformer Motor (for indoor fan) High pressure switch MOF1, 2 Motor (for outdoor fan) 4-Way valve Motor (for auto-louver) SVA,B,F Solenoid valve Electronic expansion valve...

  • Page 130: Outdoor Units Pcb

    5 Control System 5.2 Outdoor units PCB 5.2.1 Outdoor units PCB for IVX Series RAS-(3-12)H(V)RNM(1)(E) LED indication This LED indicates the transmission status between the LED1 indoor unit and the RCS This LED indicates the transmission status between the LED2 Yellow indoor unit and the outdoor unit LED3...

  • Page 131: Outdoor Units Pcb For Es Series

    5 Control System Switch indication DSW1 Test run (PCB1) DSW2 Piping length and selection function DSW3 Capacity code DSW4/RSW1 Ref. cycle number DSW5 End terminal resistor DSW6 Power source setting N O T E • The mark “■” indicates position of dips switches. Figures show setting before shipment or after selection. •...
  • Page 132 5 Control System Connector indication PCN5 Crankcase heater of compressor (oil) PCN6 Reversing valve relay PCN13 Pressure switch control PCN401 High pressure switch protection THM7 Outdoor air temperature thermistor THM8 PIPE Pipe temperature thermistor THM9 COMP Compressor temperature thermistor THM10 —...
  • Page 133 5 Control System Connector indication PCN1 Fuse PCN2 PCB1 connection for transformer PCN5 Crankcase heater of compressor (oil) PCN6 Output optional function PCN7 Output optional function PCN8 Pressure switch protection PCN9 Compressor contactor PCN13 Pressure switch control THM7 Outdoor air temperature thermistor THM8 Pipe temperature thermistor THM9...

  • Page 134: Protection And Safety Control

    5 Control System 5.3 Protection and safety control 5.3.1 Protection and safety control for IVX Series Compressor protection The following devices and their combinations protect the compressor High-pressure switch This switch cuts out the operation of the compressor when the discharge pressure exceeds 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 135: Protection And Safety Control For Es Series

    5 Control System 5.3.2 Protection and safety control for ES Series Compressor protection The following devices and their combinations protect the compressor High-pressure switch This switch cuts out the operation of the compressor when the discharge pressure exceeds 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 136: Standard Operation Sequence

    5 Control System 5.4 Standard operation sequence 5.4.1 Standard operation sequence for IVX Series Cooling operation I.U.: Indoor unit O.U.: Outdoor unit Temp. ≤ 55 ºC Power to Power to PCB in on the top Power to CH : ON O.U.: ON O.U.: ON of comp.
  • Page 137 5 Control System I.U.: Indoor unit O.U.: Outdoor unit from 1 Start of AUTO-LOUVER only for air panel Pressing Alternatively or indoor unit with AUTO-LOUVER switch auto-louver Stop of AUTO-LOUVER Stop of inverter Stop of MC Temp. ≤ 55 ºC on the top of Power to CH : ON comp.

  • Page 138: Dry Operation

    5 Control System Dry operation I.U.: Indoor unit O.U.: Outdoor unit Temp. ≤ 55 ºC Power to on the top of Power to CH : ON O.U.: ON comp. ≥ 60 ºC Power to CH : OFF Only for I.U. with Auto-louver 0 auto-louver Reset...
  • Page 139 5 Control System I.U.: Indoor unit O.U.: Outdoor unit from 1 Start of AUTO-LOUVER only for air panel Pressing Alternatively or indoor unit with AUTO-LOUVER switch auto-louver Stop of AUTO-LOUVER Stop of inverter Stop of MC Temp. ≤ 55 ºC on the top of Power to CH : ON comp.

  • Page 140: Heating Operation

    5 Control System Heating operation I.U.: Indoor unit O.U.: Outdoor unit Temp. ≤ 55 ºC Power to Power to PCB in on the top of Power to CH : ON O.U.: ON O.U.: ON comp. ≥ 60 ºC Power to CH : OFF Only for I.U.
  • Page 141 5 Control System I.U.: Indoor unit O.U.: Outdoor unit from 1 Start of AUTO-LOUVER air panel Pressing only for Alternatively or Indoor Unit AUTO-LOUVER switch with Auto-Louver Stop of AUTO-LOUVER Stop of inverter Stop of MC Temp. ≤ 55 ºC on the top of Power to CH : ON comp.
  • Page 142 5 Control System 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 Power to MOF : ON Frequency of Power to RVR: ON Comp.

  • Page 143: Standard Operation Sequence For Es Series

    5 Control System 5.4.2 Standard operation sequence for ES Series Cooling operation Continues in the next page. SMGB0060 rev. 1- 12/2010...
  • Page 144 5 Control System I.U.: Indoor unit O.U.: Outdoor unit from 1 Start of AUTO-LOUVER only for air panel Pressing Alternatively or indoor unit with AUTO-LOUVER switch auto-louver Stop of AUTO-LOUVER Stop of inverter Stop of MC Temp. ≤ 55 ºC on the top of Power to CH : ON comp.
  • Page 145 5 Control System Dry operation Continues in the next page. SMGB0060 rev. 1- 12/2010...
  • Page 146 5 Control System I.U.: Indoor unit O.U.: Outdoor unit from 1 Start of AUTO-LOUVER only for air panel Pressing Alternatively or indoor unit with AUTO-LOUVER switch auto-louver Stop of AUTO-LOUVER Stop of inverter Stop of MC Temp. ≤ 55 ºC on the top of Power to CH : ON comp.
  • Page 147 5 Control System Heating operation Continues in the next page. SMGB0060 rev. 1- 12/2010...
  • Page 148 5 Control System SMGB0060 rev. 1- 12/2010...
  • Page 149 5 Control System 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 Power to MOF : ON Frequency of Power to RVR: ON Comp.

  • Page 150: Standard Control Functions

    5 Control System 5.5 Standard control functions 5.5.1 Standard control functions for IVX Series Freezing protection during cooling process or dry operation SMGB0060 rev. 1- 12/2010...
  • Page 151 5 Control System Prevention control for excessively high discharge gas temperature Heating operation Lower than 65 ºC Outlet air temp. of I.U. Higher than 65 ºC CMC : OFF Compressor stop Is it continuous for more than 3 min? Higher than 60 ºC Discharge air temp.
  • Page 152 5 Control System Outdoor unit electrical expansion valve control After supplying power source, the electronic expansion valve is completely opened. When the compressor is stopped, the electronic expansion valve is completely closed to adjust its opening. At starting operation (compressor is operated), opening of the electronic expansion valve is set at a specified opening. Specified opening during heating operation: 1 minute During the cooling and the defrosting operations, the electronic expansion valve is set at the specified opening.
  • Page 153 5 Control System Activation for protection device control SMGB0060 rev. 1- 12/2010...
  • Page 154 5 Control System Outdoor fan control during cooling operation Operation 10 sec. *1) Fan step at start Pressure switch for control: ON Step up Is fan operated more than 3 min?. Pipe surface temp. of outdoor unit heat exchanger < 30 ºC. Pipe surface temp.
  • Page 155 5 Control System N O T E • This sequence is for the standard operation. *1) Fan step at start Outdoor temp. (Tao) Air flow ratio Tao ≤ 2 °C 2 °C < Tao ≤ 12 °C 12 °C < Tao ≤ 22 °C 22 °C <...
  • Page 156 5 Control System Outdoor fan control during heating operation Fan step: 30% area Operation Inlet air temp. of indoor unit (ºC) 30% area (1*) ≥ 100% Outdoor temperature (ºC) Pressure switch for control: TrL ≥ TrL1+2 OFF ON TrL: Indoor unit liquid pipe temp. TrL1: Indoor unit liquid pipe Is fan operated temp.
  • Page 157 5 Control System Fan steps 9 10 11 12 13 14 15 MOF2 ON speed 1 ON speed 2 Mof 1 MOF1 ON regulated Mof 2 SMGB0060 rev. 1- 12/2010...
  • Page 158 5 Control System 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 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 159: Standard Control Functions For Es Series

    5 Control System 5.5.2 Standard control functions for ES Series Freezing protection during cooling process or dry operation SMGB0060 rev. 1- 12/2010...
  • Page 160 5 Control System Prevention control for excessively high discharge gas temperature Heating operation Lower than 65 ºC Outlet air temp. of I.U. Higher than 65 ºC CMC : OFF Compressor stop Is it continuous for more than 3 min? Higher than 60 ºC Discharge air temp.
  • Page 161 5 Control System Outdoor unit electrical expansion valve control After supplying power source, the electronic expansion valve is completely opened. When the compressor is stopped, the electronic expansion valve is completely closed to adjust its opening. At starting operation (compressor is operated), opening of the electronic expansion valve is set at a specified opening. Specified opening during heating operation: 1 minute During the cooling and the defrosting operations, the electronic expansion valve is set at the specified opening.
  • Page 162 5 Control System Activation for protection device control SMGB0060 rev. 1- 12/2010...
  • Page 163 5 Control System Outdoor fan control during cooling operation Operation 10 sec. *1) Fan step at start Pressure switch for control: ON Step up Is fan operated more than 3 min?. Pipe surface temp. of outdoor unit heat exchanger < 30 ºC. Pipe surface temp.
  • Page 164 5 Control System N O T E • This sequence is for the standard operation. *1) Fan step at start Outdoor temp. (Tao) Air flow ratio Tao ≤ 2 °C 2 °C < Tao ≤ 12 °C 12 °C < Tao ≤ 22 °C 22 °C <...
  • Page 165 5 Control System Outdoor fan control during heating operation Fan step: 30% area Operation Inlet air temp. of indoor unit (ºC) 30% area (1*) ≥ 100% Outdoor temperature (ºC) Pressure switch for control: TrL ≥ TrL1+2 OFF ON TrL: Indoor unit liquid pipe temp. TrL1: Indoor unit liquid pipe Is fan operated temp.
  • Page 166 5 Control System Preheating control of compressor SMGB0060 rev. 1- 12/2010...
  • Page 167 5 Control System Control for auto cool/heat operation 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. When the CMC is ON during cooling operation, PSC is ON and Tc is higher than Tc1+4°C, forced thermo-off operation will be performed.
  • Page 168 5 Control System SMGB0060 rev. 1- 12/2010...

  • Page 169: Optional Functions

    6 Optional functions . O p t i o n a l f u n c t i o n s Index Outdoor units IVX and ES series....................6.1.1 Available ports..........................162 6.1.2 Configuration..........................163 6.1.3 Description of optional input signals....................165 6.1.4 Description of optional output signals...................

  • Page 170: Outdoor Units Ivx And Es Series

    6 Optional functions 6.1 Outdoor units IVX and ES series The system has eight input and five output signals that are programmed in the PCB of the outdoor unit using connectors CN1 and CN2 for the input signals and CN7 for the output signal. Connectors CN1 and CN2 have two and one ports respectively to configure three input options out of the eight options the system has.

  • Page 171: Configuration

    6 Optional functions Output connections Indication Connections Specification of the components for a correct installation Component Manufacturer or specifications Remarks OMRON mini power relay model: MY1F or Voltage between relay terminals 12 Vdc - 75 Auxiliary relay (X3) equivalent Voltage between terminals of the 230V - 5 (SS1) (x1), (x2) contact example Manual type mA contactor...

  • Page 172: Setting Of The Optional Signals

    6 Optional functions These signals are set up through the PCB of the outdoor unit. • Input signals Ind. Input signal Application Port N° setting application N° setting — This signal allows to pre-fix the operation mode, in this case the heating mode, independently of what the indoor unit requests.

  • Page 173: Description Of Optional Input Signals

    6 Optional functions • Selection of the input signal If the below setting change is required on-site, perform the following instructions: While the outdoor unit is ON, set the following DIP switches Input setting 1 Factory setting CN1, 1-2 on the printed circuit board of the outdoor unit as follows: set pin 6 of DSW2 to ON.

  • Page 174: Description Of Optional Output Signals

    6 Optional functions Example of wiring diagram of fixing the operation mode. Outdoor unit PCB Power supply • A: 3P connector cable. • X1: Cooling. • X2: Heating. • SS1: Fixing operation mode switch. • SS2: Change over switch Demand thermo OFF (3) This is an input function to control the maximum power that the compressor can consume.

  • Page 175: Optional Functions

    6 Optional functions Defrost operation signal (04) This optional signal is used to pick up when defrosting turns on. It is very useful to check if the indoor unit is in thermo-OFF. Connect the cabling and use the materials as shown in Available ports, see on page 162 Note that the contact of auxiliary relay X3 is closed when an operation signal is issued.
  • Page 176 6 Optional functions • Selecting the optional function     Night shift Not available Fixing of demand Not available function PSW1 SET* PSW2 PSW3 PSW1 Available SET* PSW2 PSW3 Available Defrost condition Not available Wave function Not available setting PSW1 SET*...
  • Page 177 6 Optional functions This function regulates the running current of the outdoor unit. If the demanded current is above the set current, the indoor unit capacity is reduced. The running current can be regulated both from internal signal. The capacity regulation is 50%, 75%, 100%.
  • Page 178 6 Optional functions A. Maximum rotation (rotating speed) B. Outdoor temp (ºC) N O T E • The maximum rotation (rotating speed) is always 100% for the standard unit. (No limitation of the outdoor temperature). • Change of defrost operation conditions This function allows to change the operation conditions in defrosting mode.
  • Page 179 6 Optional functions When this function is activated, the operation mode is fixed in cooling mode. Thermo ON is only available for COOL or DRY mode at indoor unit. The minimum temperature is -5 ºC. To activate this option the jumper JP4 of the outdoor unit PCB1 must be cut. –...
  • Page 180 6 Optional functions SMGB0060 rev. 1- 12/2010...

  • Page 181: Test Run

    7 Test Run . T e s t R u n Index Checking procedure before the test run..................Test run procedure using the remote control switch..............Test run procedure using the wireless remote control switch............ Test run procedure from the outdoor unit side................Check list............................

  • Page 182: Checking Procedure Before The Test Run

    7 Test Run 7.1 Checking procedure before the test run When you have finished the installation, perform the test run according to the following procedure. After performing the test run, hand over the system to the customer. Perform the test run of the indoor units one by one in order. Make sure that the electrical wiring and the refrigerant piping are correctly connected.
  • Page 183 7 Test Run • Check to ensure that the main source has been ON for more than 12 hours to warm the compressor oil by the oil heater. • Check to ensure the operating temperature: – Cooling operation: ♦ Indoor DB 21.5 ºC and above, ♦...

  • Page 184: Test Run Procedure Using The Remote Control Switch

    7 Test Run 7.2 Test run procedure using the remote control switch Turn ON the power source to the indoor and outdoor units. Select the TEST RUN mode by using the remote control switch: press MODE switch and the OK switch simultaneously for more than 3 seconds.
  • Page 185 7 Test Run Inspection points after switching Indication on the remote control Unit status Fault off the power supply The connection order of each terminal board. The fuse on the PCB may have blown out due to an incorrect wiring. (The fue can be recovered only The operation LED flickers (1 time/1 once by DSW on the PCB).

  • Page 186: Test Run Procedure Using The Wireless Remote Control Switch

    7 Test Run 7.3 Test run procedure using the wireless remote control switch N O T E 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 swirch. If that is the case, perform the test run by means of the wired remote control switch.
  • Page 187 7 Test Run In the TEST RUN mode, the red RUN LED of the receiver is turned ON and the green TIMER LED flickers (0.5 seconds ON ↔ 0.5 seconds OFF) (*2). Then, the timer switches off for two hours. N O T E •...

  • Page 188: Test Run Procedure From The Outdoor Unit Side

    7 Test Run 7.4 Test run procedure from the outdoor unit side The test run procedure from the outdoor unit side is shown below. You can set this DIP switch while the power source is ON. Setting of dip switch DSW1 Cooling: Pin 1 ON Heating: Pin 1, 2 ON...

  • Page 189: Check List

    7 Test Run 7.5 Check list 7.5.1 Check list for IVX Series Check list on test run MODEL: SERIAL No. COMPRESSOR MFG No. NAME AND ADDRESS OF CUSTOMER: 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 190 7 Test Run 20 Are the stop valves open? __________ 21 Does the drain water flow smoothly from the drain pipe? __________ Normal operation pressure You can check the excess or the deficiency of the refrigerant in comparision with the following charts and actual pressure measurement.
  • Page 191 7 Test Run N O T E • Nominal Pd and Ps Indoor unit combination: Nominal value (MPa) 2.76 2.74 2.76 2.77 2.77 Cooling 0.89 0.84 0.84 0.85 0.85 3 HP 2.56 2.54 2.56 2.57 2.57 Heating 0.74 0.70 0.70 0.70 0.70 2.58...
  • Page 192 7 Test Run Model RAS-8HRNM Cooling operation Heating operation Discharge pressure Pd (MPa) Discharge pressure Pd (MPa) Oudoor unit temp. (DBºC) Indoor unit temp. (DBºC) Indoor unit inlet temp. (WBºC) Outdoor unit inlet temp. (WBºC) Suction pressure Ps (MPa) Suction pressure Ps (MPa) Oudoor unit temp.
  • Page 193 7 Test Run Model RAS-10HRNM Cooling operation Heating operation Discharge pressure Pd (MPa) Discharge pressure Pd (MPa) Oudoor unit temp. (DBºC) Indoor unit temp. (DBºC) Outdoor unit inlet temp. (WBºC) Indoor unit inlet temp. (WBºC) Suction pressure Ps (MPa) Suction pressure Ps (MPa) Indoor unit temp.
  • Page 194 7 Test Run Model RAS-12HRNM Cooling operation Heating operation Discharge pressure Pd (MPa) Discharge pressure Pd (MPa) Oudoor unit temp. (DBºC) Indoor unit temp. (DBºC) Indoor unit inlet temp. (WBºC) Outdoor unit inlet temp. (WBºC) Suction pressure Ps (MPa) Suction pressure Ps (MPa) Oudoor unit temp.
  • Page 195 7 Test Run Check list on compressor CLIENT: MODEL: DATE: Serial N°: Production date: Checker: N° Check item Check method Result Remarks (1) Is wire of thermistor correctly connected by viewing? Is THM9 correctly connected? (2) Check to ensure the 7-segment indication of THM9: Discharge gas thermistor Td when comp.
  • Page 196 7 Test Run Additional information for “Check list on compressor” Check item Additional information (mechanism of compressor failure) 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 1 &...

  • Page 197: Check List For Es Series

    7 Test Run 7.5.2 Check list for ES Series Check list on test run MODEL: SERIAL No. COMPRESSOR MFG No.: NAME AND ADDRESS OF CUSTOMER: 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 running for at least twenty (20) minutes? __________ Check the temperature of the room:...
  • Page 198 7 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 measurement. The following checking procedure is useful during test run and maintenance work. MODEL RAS-(2-6)HVRN(1)(S)(E) Cooling operation Heating operation Discharge pressure Pd (MPa)
  • Page 199 7 Test Run MODEL RAS-(8/10)HRNSE Cooling operation Heating operation Discharge pressure Pd (MPa) Discharge pressure Pd (MPa) Outdoor unit temp. (DB ºC) Indoor unit temp. (DB ºC) Indoor unit inlet temp. (WBºC) Outdoor unit inlet temp. (WBºC) Suction pressure Ps (MPa) Suction pressure Ps (MPa) Outdoor unit temp.
  • Page 200 7 Test Run Nominal value (MPa) RPF(I) 2.73 2.88 2.85 2.89 2.84 2.78 Cooling 0.88 0.78 0.82 0.80 0.81 0.80 2 HP 2.37 2.83 2.51 2.65 2.68 2.54 Heating 0.66 0.67 0.67 0.67 0.67 0.67 2.79 2.91 2.90 2.93 2.95 2.88 Cooling 0.87...
  • Page 201 7 Test Run Check list on compressor CLIENT: MODEL: DATE: Serial No.: Production date: Checker: N° Check item Check method Result Remarks (1) Is wire of thermistor correctly connected by viewing? Is THM9 correctly connected? (2) Check to ensure the 7-segment indication of THM9: Discharge gas thermistor Td when comp.
  • Page 202 7 Test Run Additional information for “Check list on compressor” Check item Additional information (mechanism of compressor failure) 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 1 &...

  • Page 203: Troubleshooting

    8 Troubleshooting . T r o u b l e s h o o t i n g Index Initial troubleshooting for IVX an ES Series................8.1.1 Checking by means of the 7-segment display................196 8.1.2 Failure of the power supply to the indoor unit and the remote control switch....... 197 8.1.3 Abnormal transmission between the remote control switch and the indoor unit......

  • Page 204: Initial Troubleshooting For Ivx An Es Series

    8 Troubleshooting 8.1 Initial troubleshooting for IVX an ES Series 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 which are connected to the outdoor unit. Turn on the outdoor unit Auto-addressing starts.

  • Page 205: Failure Of The Power Supply To The Indoor Unit And The Remote Control Switch

    8 Troubleshooting 8.1.2 Failure of the power supply to the indoor unit and the remote control switch • The LED and the LCD are not indicated. • Not operated If the fuses are blown out or a breaker is activated, investigate the cause of the overcurrent and take the necessary action. Action Phenomenon Cause...

  • Page 206: Abnormal Transmission Between The Remote Control Switch And The Indoor Unit

    8 Troubleshooting 8.1.3 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) Check the cable and the Repair the cable or connect the Disconnection or insufficient contacting of the remote control cable connections...
  • Page 207 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF the main switch) Failure of thermistor Failure of air inlet Disconnection of Replace or correctly connect the thermistor thermistor Check it by self-checking *2) wires if Abnormal Operation exists Abnormal operation of the remote control switch cord Check PCB by means of the self- Failure of the indoor unit PCB...
  • Page 208 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF the main switch) Indoor cool load is greater than the cooling capacity Calculate the cool load Use a bigger unit Gas leakage or shortage Correctly charge the refrigerant Measure superheat of refrigerant after repairing the gas leakage Excessively small Measure and check the field-...
  • Page 209 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF the main switch) Clogging of the outdoor unit heat Remove the clogging exchanger? Obstacles at the inlet or the Insufficient air flow to the outlet of the outdoor unit heat Remove the obstacles outdoor unit heat exchanger exchanger...
  • Page 210 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF the main switch) Indoor heat load is greater than the heating capacity Calculate the heat load Replace the unit with a bigger unit Gas leakage or Correctly charge the refrigerant insufficient refrigerant Measure superheat after the gas leakage check and charge...
  • Page 211 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF the main switch) Foreign particles inside of the fan casing Visually inspect it Remove the foreign particles Adjust the position of the fan Indoor unit fan runner is hitting the casing Visually inspect it runner Outdoor unit propeller fan is hitting the shroud...

  • Page 212: Troubleshooting Procedure For Ivx An Es Series

    The screen also displays the indoor unit number -A-, the alarm code -B- and the model code -C-. If there are various indoor units connected, the above mentioned information is shown for each one of them -D-. Write down the indications and contact your HITACHI service supplier. • Power supply failure All displays disappear.
  • Page 213 8 Troubleshooting Alarm codes for IVX and ES Series Code Category Type of Abnormality Main cause Failure of fan motor, drain discharge, PCB, relay, float switch Indoor unit Activation of protection device activated. Activation of PSH, locked motor, abnormal operation in the Outdoor unit Activation of protection device power supply phase.
  • Page 214 8 Troubleshooting Code Category Type of Abnormality Main cause IU No. setting Incorrect unit No. setting Over 64 indoor units, setting by no. or indoor unit address. Room temperature thermistor Sensor on KPI Failure of thermistor, sensor, connection. Unit Outdoor temperature thermistor SMGB0060 rev.

  • Page 215: Troubleshooting By Alarm Code

    8 Troubleshooting ¿ 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 216 8 Troubleshooting Alarm code Activation of the safety device in the outdoor unit for IVX series • 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 217 8 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 Check for any obstacles at Insufficient Air Flow to the Heat Exchanger (Outdoor Heat the inlet or the outlet of the Remove the obstacles...
  • Page 218 8 Troubleshooting Alarm code Activation of the safety device in the outdoor unit for ES series • 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 219 8 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 Check for any obstacles at Insufficient Air Flow to the Heat Exchanger (Outdoor Heat the inlet or the outlet of the Remove the obstacles...
  • Page 220 8 Troubleshooting Alarm code Abnormal transmission between the indoor units and the outdoor unit for IVX series • 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 221 8 Troubleshooting Is DSW5-1P (terminal Set it correctly resistance on PCB1) ON? Is the voltage between the terminal "1" and "3" of PCB1 Check the fuses of the Is LED1 (red) on 220V or 240V? *2) outdoor unit power supply PCB1 ON? Remove CN8 of Is connector...
  • Page 222 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF the main switch) Power failure or no power supply Measure the voltage using the tester Supply the power Check the insulation material for Remove the short circuit and Short circuit between wires breaks replace the fuse Remove the short circuit to ground...
  • Page 223 8 Troubleshooting Alarm code Abnormal transmission between the indoor units and the outdoor unit for ES series • The RUN LED flickers and "ALARM" is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 224 8 Troubleshooting SMGB0060 rev. 1- 12/2010...
  • Page 225 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF the main switch) Measure the voltage by means of Power failure or power is not ON Supply the power the tester Check the insulation material for Remove the short-circuit and Short-circuit between the wires breaks replace the fuse Remove short-circuit to ground and...
  • Page 226 8 Troubleshooting Alarm code Abnormal transmission between Inverter PCB and Outdoor PCB1 for IVX Series • 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 227 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF the main switch) Between control PCB, inverter PCB Check the continuity of wires. Replacing wires, repairing, and FANM Disconnected wires, insufficient Check for looseness of the tightening screws and incorrect contacting or incorrect connection connection screws.
  • Page 228 8 Troubleshooting Alarm code Abnormal transmission between Inverter PCB2 and Outdoor PCB1 for ES Series • 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 8 Troubleshooting RAS-(4–6)HVRNS1E N O T E • Regarding the checking of DC fan motor, refer to section Procedure of checking other main parts for ES Series, see on page 312 SMGB0060 rev. 1- 12/2010...
  • Page 230 8 Troubleshooting RAS-(8/10)HRNSE RAS-(4–10)H(V)RNS(1)(E) Action Phenomenon Cause Check item (Turn OFF the main switch) Between control PCB, inverter Check the continuity of wires. Replacing wires, repairing, PCB2 Disconnected wires, insufficient Check for looseness of the tightening screws and incorrect contacting or incorrect connection connection screws.
  • Page 231 8 Troubleshooting Alarm code Code abnormal operation of picking up phase signal for IVX Series • 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 8 Troubleshooting Alarm code Excessively low voltage or excessively high voltage for the inverter for IVX Series • 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 8 Troubleshooting RAS-(4-6)HRNM1E Restart the operation Is the power supply Check the wiring and the voltage 400V ±10%? cable capacity Is the voltage over 340V during the operation? Does the voltage fall during the operation because of the operation of other apparatus? Frequency can increase higher than 60 Hz How is the...
  • Page 234 8 Troubleshooting RAS-(8-12)HRNM Restart the operation Is the power supply voltage Check the wiring and the 380V ±10% or 415V ±10% cable capacity Is the voltage over 323V during operation? Does the voltage fall during the operation because of the operation of other apparatus? Frequency can increase higher than 60 Hz...
  • Page 235 8 Troubleshooting Alarm code Excessively low voltage or excessively high voltage for the inverter for ES Series • 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 8 Troubleshooting RAS-(4-6)HVRNS1E N O T E • *1): Checking procedures of IPM is indicated in item Procedure of checking other main parts for ES Series, see on page 312 SMGB0060 rev. 1- 12/2010...
  • Page 237 8 Troubleshooting RAS-(8/10)HRNSE N O T E • *1): If capacitor has high voltage, perform the high voltage discharge work refer to the item Procedure of checking other main parts for ES Series, see on page 312. • *2): Regarding replacing or checking method for the inverter PCB, refer to the item Procedure of checking other main parts for ES Series, see on page 312.
  • Page 238 8 Troubleshooting Alarm code Decrease of Discharge Gas Superheat for IVX Series • 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 239 8 Troubleshooting Alarm code Decrease of Discharge Gas Superheat for ES Series • 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 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF the main switch) Check ref. cycle and the Ref. cycle is different from the electrical system Repair wiring electrical system Overcharged Refrigerant Measure pressure Correctly charge refrigerant Replace expansion valve if Faulty Expansion Valve Check expansion valve *1) faulty...
  • Page 241 8 Troubleshooting Alarm code Excessively High Discharge Gas Temperature at the Top of Compressor for IVX Series • 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 8 Troubleshooting Alarm code Excessively High Discharge Gas Temperature at the Top of Compressor for ES Series • 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 8 Troubleshooting Alarm code Abnormal operation of thermistor for the indoor unit air inlet temperature (air inlet thermistor) • The RUN LED flickers and "ALARM" is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 244 8 Troubleshooting Abnormal operation of the thermistor for the indoor discharge air temperature (air outlet Alarm code thermistor) • The RUN LED flickers and "ALARM" is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 245 8 Troubleshooting Abnormal operation of the thermistor for the indoor unit heat exchanger liquid pipe Alarm code temperature (freeze protection thermistor) • The RUN LED flickers and "ALARM" is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 246 8 Troubleshooting Abnormal operation of the thermistor for the indoor unit heat exchanger gas pipe temperature Alarm code (gas piping thermistor) • The RUN LED flickers and "ALARM" is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 247 8 Troubleshooting Alarm code Abnormal operation of thermistor for fresh outdoor air (Econofresh) • 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 8 Troubleshooting Alarm code Activation of the protection device for the indoor fan motor (except RCI, RCIM 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 249 8 Troubleshooting Alarm code Activation of the protection device for the indoor fan motor (RCI, RCIM) • The RUN LED flickers and "ALARM" is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
  • Page 250 8 Troubleshooting Alarm code Activation of the protection device for the indoor fan motor (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 PCB1.
  • Page 251 8 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 252 8 Troubleshooting Abnormal operation of the thermistor for the outdoor temperature (outdoor unit ambient Alarm code thermistor) for IVX Series • 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 8 Troubleshooting Abnormal operation of the thermistor for the outdoor temperature (outdoor unit ambient Alarm code thermistor) for ES Series • The RUN LED flickers and "ALARM" is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 254 8 Troubleshooting Abnormal operation of the thermistor for the evaporating temperature during the heating Alarm code process (outdoor unit) • The RUN LED flickers and "ALARM" is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 255 8 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 256 8 Troubleshooting Alarm code Incorrect Indoor number setting • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, alarm code and unit model code appear alternately on the Set Temperature display of the remote control switch.
  • Page 257 8 Troubleshooting Alarm code Abnormality of Protective Circuit for Protection (Outdoor Unit) for IVX Series • 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 258 8 Troubleshooting Alarm code Abnormality of Protective Circuit for Protection (Outdoor Unit) for ES Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 259 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF Main Switch) Faulty DIP-IPM Check DIP-IPM by seft-checking Replace DIP-IPM N O T E For PCB self diagnosis, see Page 420 of “Technical Catalogue/Service Manual”. This alarm (Alarm Code: 38) may appear when the operation is started, if the Faston terminal of the high pressure switch (63H1) is improperly connected or damaged (open-circuit fault).
  • Page 260 8 Troubleshooting Alarm code Cooling Overload (High pressure switch will be activated) for IVX Series • 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 261 8 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 Check the service space Secure service space of outdoor unit Check for speed: Outdoor fan: cooling Replace fan motor if faulty...
  • Page 262 8 Troubleshooting Alarm code Cooling Overload (High pressure switch will be activated) for ES Series • 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 263 8 Troubleshooting RAS-(4–6)HVRNS1E SMGB0060 rev. 1- 12/2010...
  • Page 264 8 Troubleshooting RAS-(8/10)HRNSE SMGB0060 rev. 1- 12/2010...
  • Page 265 8 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 Check the service space Secure service space Exchanger of Outdoor Unit Check for speed: Outdoor Fan: Cooling Replace fan motor if faulty...
  • Page 266 8 Troubleshooting Alarm code Heating Overload (High pressure switch will be activated) for IVX Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 267 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF main switch) Clogging of Heat exchanger Check for dust on air filter Remove it Check for any obstacle at inlet or Insufficient air flow to heat outlet of heat exchanger exchanger of indoor unit Check the service space Secure service space Check for fan speed.
  • Page 268 8 Troubleshooting Alarm code Heating Overload (High pressure switch will be activated) for ES Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 269 8 Troubleshooting RAS-(8/10)HRNSE SMGB0060 rev. 1- 12/2010...
  • Page 270 8 Troubleshooting Action Phenomenon Cause Check item (Turn OFF Main Switch) Clogging of Heat Exchanger Check for dust on air filter Remove it Check for any obstacle at inlet or Activation of High Pressure Switch Insufficient Air Flow to Heat outlet of heat exchanger due to Excessively High Discharge Exchanger of Indoor Unit...
  • Page 271 8 Troubleshooting Activation to Protect System from Excessively Low Suction Pressure (Protection from Alarm code Vacuum Operation) for ES Series • 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 272 8 Troubleshooting Alarm code Overcurrent protection activation for IVX series Turn OFF power and disconnect U, V, W from Is there any cause of compressor terminals. Check the Restart operation. instantaneous voltage Turn ON #1 of DSW1 on PCB2 compressor. Does it trip soon? decrease? (IPM or dipIPM) and restart.
  • Page 273 8 Troubleshooting Alarm code Activation Protection Against Instantaneous Overcurrent of Inverter for ES Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB.
  • Page 274 8 Troubleshooting Alarm code Abnormal operation of the current sensor • 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 275 8 Troubleshooting Protection activation of IPM or DipIPM and PCB2 ( RAS-(3-6)HVRNM(1)E) and RAS- Alarm code (8-12)HRNM) for IVX Series • 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 276 8 Troubleshooting Alarm code Activation for protecting the ISPM (RAS-(3-6)HRNM(1)E) for IVX Series • 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 277 8 Troubleshooting Alarm code Transistor module protection activation for ES Series • 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 278 8 Troubleshooting Alarm code Protection activation of IPM or PCB2 for ES Series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1.
  • Page 279 8 Troubleshooting Alarm code Increase in the inverter fin temperature IVX Series • 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 280 8 Troubleshooting Alarm code Increase in the inverter fin temperature for ES Series • 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 281 8 Troubleshooting Alarm code IPM or PCB2 abnormality for IVX Series • 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 282 8 Troubleshooting Alarm code Abnormality of Inverter Module for ES Series • 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 283 8 Troubleshooting Alarm Code Inverter Failure for ES series • The RUN LED flickers and “ALARM” is displayed on the remote control switch. • The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 –...
  • Page 284 8 Troubleshooting • *3): Turn ON the No.1 switch of the dip switch DSW1 on PCB2 when restarting with disconnecting the terminals of the compressor. After troubleshooting, turn OFF the No.1 switch of the dip switch DSW1 on PCB2. • *4): Use the silicon grease provided as accessory (Service Parts No.: P22760).
  • Page 285 8 Troubleshooting Alarm code Abnormality of fan motor protection (DC fan motor) for IVX series • 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 286 8 Troubleshooting Alarm code Abnormality of fan motor protection (DC fan motor) for ES Series • 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 287 8 Troubleshooting Alarm code Inverter Fin Temp. Thermistor Abnormality (Only for RAS-(8/10)HRNSE) for ES series • “RUN” light flashes and “ALARM” is indicated on the remote control switch. • The unit No, alarm code and the unit code is alternately indicated on the set temperature section, and the unit No. and alarm code are indicated on the display of the outdoor unit PCB1.
  • Page 288 8 Troubleshooting Alarm code Abnormal operation of Thermistor for the KPI (room Temperature Thermistor) for IVX series • 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 289 8 Troubleshooting Alarm code Abnormal operation of thermistor for the KPI (outdoor temperature thermistor) for IVX Series • 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 290 8 Troubleshooting Alarm code Compressor protection for IVX Series • This alarm code is displayed when one of the following alarms occurs three times within six hours. If the outdoor unit operates continuously without removing the cause of the alarm, the compressor may be seriously damaged Alarm code Content of abnormality Tripping of protection device in outdoor unit...

  • Page 291: Troubleshooting In Check Mode

    8 Troubleshooting 8.2.2 Troubleshooting in check mode Use the “OK” switch of the remote control in the following cases: When the RUN LED is flickering. To trace back the cause of the malfunction after restarting from the stoppage while the RUN LED is flickering. SMGB0060 rev.
  • Page 292 8 Troubleshooting To check during the normal operation or during the stoppage. To monitor the inlet air temperature and the discharge air temperature. SMGB0060 rev. 1- 12/2010...
  • Page 293 8 Troubleshooting Although the wireless controller is used for the wall type indoor unit with the built-in receiver part, you can check the alarm code by connecting the PC-ART. N O T E • The unit does not operate by pressing the operation switch.
  • Page 294 8 Troubleshooting Indication of micro-computer input/output Part name Relay Micro-computer input/  YH2: Relay for drain pump (MD) and/or dew heater (EHW). output in indoor unit 52H: Relay for electric heater (CEH) Y21: Relay for 4-way valve Y52C: Relay for compressor Micro-computer input/ ...
  • Page 295 8 Troubleshooting Operation OFF, Power OFF Thermo - OFF (Note 1) Alarm (Note 2) Freeze protection, overheating protection Instantaneous power failure at outdoor unit, reset (Note 3) Instantaneous power failure at indoor unit, reset (Note 4) Stoppage of Cooling operation due to Low Outdoor Air Temperature (<=-7 ºC), Stoppage of Heating Operation due to high Outdoor Air Temperature, and high indoor air temperature, stoppage of heating operation due to low Outdoor Air Temperature (<=-20 ºC) Demand, enforced stoppage Retry due to high pressure increase...
  • Page 296 8 Troubleshooting In this case, the stoppage cause is d1-06 and the alarm code “03” may be displayed. • In the system “20” will be indicated at the difference between indoor units. N O T E • If a transmission error continues for three minutes, one is added to the occurrence counter. •...
  • Page 297 8 Troubleshooting Contents for Check mode 2 When more than three indoor units are connected to remote control switch, the latest data of only the first three indoor units are connected serially are displayed. If you press the part "▲" of the TEMP switch, the next display appears. If you press the past "▼" of the TEMP switch, the previous display appears.

  • Page 298: Troubleshooting By Means Of The 7-Segment Display

    8 Troubleshooting 8.2.3 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 unit’s on-board 7-segment LED display: Disconnection of power supply to the indoor unit. Reverse connection of the operating line between the outdoor and indoor units.
  • Page 299 8 Troubleshooting Item Indication data Item Check Inidic. Indic Contents Total capacity of indoor unit 00~96 (00~80 in case of ≤6 HP) connected Input / output state of outdoor Indicates only for the segments corresponding to the equipment in the figure. (See micro-computer figure above) Alarm code for abnormal...
  • Page 300 8 Troubleshooting Cause of inverter stoppage (11) Indication Contents IPM, ISPM, DIP-IPM error Instantaneous Over Current Inverter Fin Thermistor Protection Activation Electronic Thermal Activation Inverter Voltage Decrease Over Voltage Abnormal Transmission Abnormal Current Detection Instantaneous Power Failure Detection Reset of Micro-Computer for Inverter Earth Fault Detection from Compressor Open Phase Detection Inverter Malfunction...
  • Page 301 8 Troubleshooting Cause of Indoor Unit stoppage (20) Indication Contents Operation OFF, Power OFF Thermo-OFF Alarm Freeze Protection Overheating Protection Instantaneous Power Failure at Outdoor Unit Instantaneous Power Failure at Indoor Unit Stoppage of Cooling Operation due to Low Outdoor Air Temperature Stoppage of Heating Operation due to High Outdoor Air Temperature Demand thermo OFF Retry for Pd Increase Prevention...

  • Page 302: Troubleshooting By Means Of The Flashing Alarm Leds For Rpk-Fsnm

    8 Troubleshooting 8.2.4 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 303: Cause Of Inverter Stoppage

    8 Troubleshooting 8.2.5 Cause of inverter stoppage Remark Cause of Stoppage Code Cause for Corresponding Indication Alarm Code Unit during Retry Automatic Stoppage of Transistor Module (DIP-IPM Error) (Overcurrent, Undercurrent, Temperature increase) Instantaneous Over Current Abnormal Inverter Fin Thermistor Electronic Thermal Activation (Inverter overcurrent) Inverter Voltage Decrease (Undervoltage) Over Voltage Abnormal Inverter Transmission...
  • Page 304 8 Troubleshooting Code Protection Control Inverter-Trip Retry Control Voltage Drop (or Overvoltage) Retry Control Protection Control for Power Source Voltage Unbalance Detection  Current Demand Control Suction Pressure Decrease Prevention Control • Retry indication continues for 30 minutes unless a protection control is indicated. •...
  • Page 305 8 Troubleshooting The activating conditions of protection control are shown in the table below Code Protection Control Activating Condition Remarks Low-Pressure Ratio Control at Cooling Compression Ratio ε < 2.2 ε = (Pd+0.1)/(Ps+0.1) Operation => Frequency Increase High-Pressure Ratio Control at Heating Compression Ratio ε...
  • Page 306 8 Troubleshooting (3*) 230V 400V Current (A) 10.5 16.0 24.0 24.0 17.5 20.0 (4*) 230V 400V Demand setting 100% 11.5 13.0 17.0 20.0 11.0 Current (A) 10.0 13.0 15.0 10.0 (5*) 230V 400V Current (A) 12.0 15.0 18.5 13.0 13.0 SMGB0060 rev.

  • Page 307: Procedure For Checking Each Main Part

    8 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 outdoor unit: 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: Turn OFF the power supply.
  • Page 308 8 Troubleshooting Connect the PC-P2HTE. Turn ON the power supply. After finishing the checking, turn OFF the power supply again and reconnect the connectors according to the previous situation before the checking. N O T E J1 is not displayed, this means that each one of indoor unit is •...

  • Page 309: Self-Checking Of The Remote Control Switch

    8 Troubleshooting 8.3.2 Self-checking of the remote control switch Cases where the CHECK switch is used: If the remote control switch displays a malfunction. For the regular maintenance check. Changing of LCD Indication Only for Indicating Turn ON the power source. LCD Indication Period cancellation...
  • Page 310 8 Troubleshooting The LCD indication changes as shown below. The detected temperature of remote control thermostat is indicated at the part (A) in the figure below. If the number "- -" or "FF" is indicated at the (A) part, the remote control thermostat is abnormal. In case of depressing the RESET switch or The LCD indication changes as leaving the switches for 15 seconds, the data...

  • Page 311: Self-Checking Procedure Of The Indoor Unit Pcb (Only For Rpk)

    8 Troubleshooting 8.3.3 Self-Checking procedure of the Indoor Unit PCB (only for RPK) Self-checking procedure by means of the relays on the indoor unit PCB • To check the abnormal operation on the indoor unit PCB due to a malfunction. •...
  • Page 312 8 Troubleshooting ¿ Procedure of checking other main parts Procedure of checking other main parts for IVX Series 1. High voltage discharge work for replacing parts D A N G E R • Perform this high voltage discharge work to avoid an electric shock •...
  • Page 313 8 Troubleshooting 2. Checking method of transistor module • Outer appearance and internal circuit of transistor module 1. Drive circuit. 2. Overheating protection circuit. 3. Sensor. • Procedure: 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.
  • Page 314 8 Troubleshooting 3. Checking method of diode module If items (a) to (d) are performing and the results are satisfactory, the diode module is normal. Measure it under 1kΩ range of a tester. Do NOT use a digital tester. a. By touching the + side of the tester to the + terminal of diode module and the - side of tester to the ~ terminals (3 NOs.) of the diode module, measure the resistance.
  • Page 315 8 Troubleshooting d. By touching the + side of the tester to the - terminal of diode module and the - side of tester to the ~ terminals (3 NOs.) of the diode module, measure the resistance. If all the resistances are greater than 500kΩ, it is normal. •...
  • Page 316 8 Troubleshooting Wire color for checking (normal value) Model Motor model Red-Black White-Black Yellow-Black Blue-Black RAS-4H(V)RNM1E (upper) SIC-65FV-D840-1 1 MΩ or greater 26~50kΩ 168~312kΩ 1 MΩ or greater RAS-(4-6)H(V)RNM1E (lower) RAS-3HVRNME RAS-(5-6)HVRNM1E (upper) SIC-68FV-D851-7 1 MΩ or greater 42-78kΩ 168~312Ω 1 MΩ...
  • Page 317 8 Troubleshooting a. By touching the + side of the tester to the P1 terminal of ISPM and the - side of the tester to R and S of ISPM, measure the resistance. If all the resistances are more than 1 kΩ, it is normal. b.
  • Page 318 8 Troubleshooting • Checking procedure for the electronic expansion valve Valve position Electronic expansion valve Outdoor unit electronic expansion valve Check the temperature of the piping in the It is abnormal if the liquid pipe pressure does not Locked fully closed heating process.
  • Page 319 8 Troubleshooting • Checking procedure for the compressor CHECK LIST ON COMPRESSOR Client: Model: Date: Serie 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 320 8 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 321 8 Troubleshooting 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. b.
  • Page 322 8 Troubleshooting 2. Inverter module checking procedure • Internal Circuit of Rectified Part of DIP-IPM Non-faulty if [1] – [8] are checked and satisfied. (Measure with 1 kΩ range of a tester.) N O T E DO NOT use a digital tester 1.
  • Page 323 8 Troubleshooting 5. Touch [+] of the tester to [P] of DIP-IPM (soldered part), and [-] to DIP-IPM U, V, W terminals to measure the resistance. Normal if all three terminals have 1 kΩ or greater. 6. Contrary to [5], touch [-] of the tester to [P] of DIP-IPM (soldered part), and [+] to DIP-IPM U, V, W terminals to measure the resistance .
  • Page 324 8 Troubleshooting • DIP-IPM 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. b.
  • Page 325 8 Troubleshooting the transistor module is normal. Measure it under 1kΩ range of a tester. Do NOT use a digital tester. a. By touching the + side of the tester to the P terminal of transistor module and the - side of tester to U, V and W of transistor module, measure the resistance.
  • Page 326 8 Troubleshooting b. By touching the - side of the tester to the + terminal of diode module and the + side of tester to the ~ terminals (3 NOs.) of the diode module, measure the resistance. If all the resistances are greater than 500kΩ, it is normal. c.
  • Page 327 8 Troubleshooting d. By touching the + side of the tester to the - terminal of diode module and the - side of tester to the ~ terminals (3 NOs.) of the diode module, measure the resistance. If all the resistances are greater than 500kΩ, it is normal. •...
  • Page 328 8 Troubleshooting a. By touching the + side of the tester to the P1 terminal of ISPM and the - side of the tester to R and S of ISPM, measure the resistance. If all the resistances are more than 1 kΩ, it is normal. b.
  • Page 329 8 Troubleshooting • Checking procedure for the electronic expansion valve Valve position Electronic expansion valve Outdoor unit electronic expansion valve Check the temperature of the piping in the It is abnormal if the liquid pipe pressure does not Locked fully closed heating process.
  • Page 330 8 Troubleshooting Wire color for checking (normal value) Model for ES Motor model Red-Black White-Black Yellow-Black Blue-Black RAS-(2/2.5)HVRN1(E) FPD10U4OS-902 or 13.5 ~ 14.4 1 MΩ or greater 225~226 kΩ 1 MΩ or greater RAS-3HVRNS DAJ12-55V71 RAS-4HVRNS1E SIC-68FV-D851-7 1 MΩ or greater 42 ~ 78 kΩ...
  • Page 331 8 Troubleshooting • Checking procedure for the compressor CHECK LIST ON COMPRESSOR Client: Model: Date: Serie 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 332 8 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 333: Spare Parts

    9 Spare Parts . S p a r e P a r t s Index Spare parts for IVX Series......................Spare parts for ES Series......................SMGB0060 rev. 1- 12/2010...

  • Page 334: Spare Parts For Ivx Series

    9 Spare Parts 9.1 Spare parts for IVX Series RAS-3HVRNME • Cycle and structural parts SMGB0060 rev. 1- 12/2010...
  • Page 335 9 Spare Parts Part name Remarks U00A Terminal board — U00B THM support D — U01A Pressure SW Protection U01B Pressure SW Control Fuse 40 A U15A Thermistor U15B Thermistor Piping U15C Thermistor Compressor Noise filter 30 A Inverter fin assy DIP-IPM (17 A) U21A Expansion valve...
  • Page 336 9 Spare Parts • Electrical parts Part name Remarks U71A Fan motor 74 W MG SW — Oil heater 30 W 4 way valve — Coil for 4 way valve — U82A Transformer — U98A Service cover S assy Assembly U98B Rear cover S assy Assembly...
  • Page 337 9 Spare Parts RAS-(4-6)HVRNM1E • Cycle and structural parts SMGB0060 rev. 1- 12/2010...
  • Page 338 9 Spare Parts Part name Remarks U00A Terminal board — U01A Pressure SW Protection U01B Pressure SW Control Fuse 40 A, 5/6 HP 50 A U15A Thermistor U15B Thermistor Piping U15C Thermistor Compressor Noise filter 30 A Inverter fin assy DIP-IPM (17 A) 576 (25 A) U21A Expansion valve...
  • Page 339 9 Spare Parts • Electrical parts Part name Remarks Compressor — U71A Fan motor 74 W U71B Fan motor 74 W MG SW — U77A Solenoid valve — U77B Coil for solenoid valve — Oil heater 40 W 4 way valve —...
  • Page 340 9 Spare Parts RAS-(4-6)HRNM1E • Cycle and structural parts SMGB0060 rev. 1- 12/2010...
  • Page 341 9 Spare Parts Part name Remarks U00A Terminal board — U01A Pressure SW Protection U01B Pressure SW Control Fuse 20 A 2700 μf Capacitor U15A Thermistor U15C Thermistor Compressor Noise filter 30 A Inverter module ISPM U21A Expansion valve — U21B EXPV coil —...
  • Page 342 9 Spare Parts • Electrical parts SMGB0060 rev. 1- 12/2010...
  • Page 343 9 Spare Parts Part name Remarks Compressor — U71A Fan motor 74 W U71B Fan motor 74 W MG SW — U74A Resistor — U74B Resistor — U77A Solenoid valve — U77B il for solenoid valve — Oil heater 40 W 4 way valve —...
  • Page 344 9 Spare Parts RAS-(8-12)HRNM • Cycle and structural parts U77B U77E U30D U01B U01A U40A U01C U77B U77A U30C U30B U27A U27B U77C U21A U21B U77D U30A U15A U71B U15B U40B U15C U71A U32B U32A U98A U98B SMGB0060 rev. 1- 12/2010...
  • Page 345 9 Spare Parts Part name Remarks U01A Pressure SW High pressure U01B Pressure SW For control U01C Pressure SW Low pressure Fuse 40 A - 60 A 4700 μF U14A Capacitor 7 μF U14B Capacitor U15A Thermistor — U15B Thermistor —...

  • Page 346: Electrical Parts

    9 Spare Parts • Electrical parts U74A U14A U65C U74B U65A U14A U65B U85C U85D U65D U82B U85B U14B U85A U15D View from P View from Q U65A U82A U65B U85E U16B U74C U16A U65C SMGB0060 rev. 1- 12/2010...
  • Page 347 9 Spare Parts • Electrical parts (cont) U82A U74C U14A U65D U85A U15D View from P U65A U65C U65B U85C U85D U65B U16A U82B U14B Drawing number: SPN200617 (RAS-8~12HRNM) SMGB0060 rev. 1- 12/2010...
  • Page 348 9 Spare Parts Part name Remarks L-tank assy — U65A Plastic material — U65B Plastic material — U65C Plastic material — U65D Plastic material — Compressor — U71A Motor — U71B Motor — Mag. contactor — U74A Resistor — U74B Resistor —...

  • Page 349: Spare Parts For Es Series

    9 Spare Parts 9.2 Spare parts for ES Series RAS-(2/2.5)HVRN1(E) • Cycle, structural and electrical parts U34B U15C U15A U32B U21B U21A U01A U01B U15B U32A U34A U27B U27A SMGB0060 rev. 1- 12/2010...
  • Page 350 9 Spare Parts Part name Remarks U01A Pressure SW High pressure U01B Pressure SW For control U15A Thermistor TA (Ambient) U15B Thermistor TE (Evaporation) U15C Thermistor TD (Discharge) U21A Expansion valve — U21B Coil for expansion valve — U27A Stop valve Gas line U27B Stop valve...
  • Page 351 9 Spare Parts RAS-3HVRNS • Cycle, structural and electrical parts U98A U34B U15C U15A U32B U98E U21B U21A U01A U01B U15B U98B U32A U98D U34A U27B U27A U98C SMGB0060 rev. 1- 12/2010...
  • Page 352 9 Spare Parts Part name Remarks U01A Pressure SW High pressure U01B Pressure SW Control Fuse U15A Thermistor TA (Ambient) U15B Thermistor TE (Evaporation) U15C Thermistor TD (Discharge) U21A Expansion valve — U21B Coil for expansion valve — U27A Stop valve U27B Stop valve Liquid...
  • Page 353 9 Spare Parts RAS-(4-6)HVRNS1E • Cycle, structural and electrical parts SMGB0060 rev. 1- 12/2010...
  • Page 354 9 Spare Parts • Electrical parts SMGB0060 rev. 1- 12/2010...
  • Page 355 9 Spare Parts Part name Remarks U00A Terminal Board — U01A Pressure SW Protection U01B Pressure SW Control Fuse 40 A for 4 HP, 50 A for 5/6 HP Electrical Wiring Diagram Assembly (Steel Plates + Components + Harness) U15A Thermistor U15B Thermistor...
  • Page 356 9 Spare Parts RAS-(8/10)HRNSE • Cycle and structural SMGB0060 rev. 1- 12/2010...
  • Page 357 9 Spare Parts Part name Remarks Rear Cover Assy Assembly H-Cover — Handle — Piping Cover B Rear Piping Cover Upper Cover Assy Assembly Service Cover Assy Assembly S Cover B Lower Service Cover Protection Net — Shroud Assy — Air Grille Air Outlet Shroud...
  • Page 358 9 Spare Parts Part name Remarks 27-7 Stop Valve 3/8 for Liquid Line 27-8 Stop Valve 3/4 for Gas Line Coil for SVA. Not included in 27-1 Coil for RVR. Not included in 27 Valve Stay — Valve Stay Not included in 27 Thermistor TA (Air) Thermistor...
  • Page 359 9 Spare Parts • Electrical parts SMGB0060 rev. 1- 12/2010...
  • Page 360 9 Spare Parts Part name Remarks Attaching P-Plate Assy Assembly (1-1~1-14) Attaching P-Plate — Printed Circuit Board PCB Main (PO 052) Printed Circuit Board PCB for AC Fan Motor (PO 083) Plastic Material Spacer Plastic Material Spacer Plastic Material Spacer Transformer Terminal Board Noise Filter...

  • Page 361: Servicing

    10 Servicing . S e r v i c i n g Index 10.1 Introduction..........................10.2 Servicing for IVX series......................10.2.1 Outdoor unit RAS-3HVRNME....................... 355 10.2.2 Outdoor units RAS-(4-6)H(V)RNM1E................... 366 10.2.3 Oudoor units RAS-(8-12)HRNM....................379 10.3 Servicing for ES Series......................10.3.1 Outdoor Units RAS-(2/2.5)HVRN1(E) and RAS-3HVRNS............

  • Page 362: Introduction

    10 Servicing 10.1 Introduction D A N G E R • Before performing any of the service operations described in this chapter, turn all the main switches off and the place security lockers or convenient warning indicators in order to prevent them from turning on accidentally.

  • Page 363: Servicing For Ivx Series

    10 Servicing 10.2 Servicing for IVX series 10.2.1 Outdoor unit RAS-3HVRNME ¿ Removing service cover N O T E • Remove the main parts according to the following procedures. – To reassemble perform the procedures in reverse. – To prevent contamination of the refrigerant with water or foreign particles, do not expose open to atmosphere for long periods.

  • Page 364: Removing Upper Cover

    10 Servicing ¿ Removing air outlet grille Remove the four (4) fixing screws. Lift the air outlet grille holding the lower parts. Release the extruded hook of the air outlet grille from the shroud. 1. Air outlet grille. 2. Shroud. ¿...
  • Page 365 10 Servicing Fix the motor wire with the cable tie or the cord clamp. If not, it may cause the disconnection of the fan motor’s lead wire. In order to avoid cutting edges, mount the rubber bush at the partition plate when inserting the motor wire through it. If not, it may cause the disconnection to the fan motor’s lead wire.
  • Page 366 10 Servicing 1. Upper cover. 2. Rear panel. 3. Check joint. 4. Rear pipe cover. 5. Crankcase heater. 6. Valve Stay. Remove the rubber cap and the thermistor on the top of the compressor. 1. Sound-proof cover. 2. Oil heater. 3.
  • Page 367 10 Servicing Remove the crankcase heater. (Oil heater on the lower case). 1. Thermistor holder. 2. Holder. 3. Td Thermistor. 4. Thermistor fixing plate. 5. Rubber cap Th Thermistor. 6. Indication of terminal number. 7. Terminal box cover. 8. Compressor. 9.
  • Page 368 10 Servicing A. Details for compressor terminals. N O T E • Do not expose the refrigerant cycle to the atmosphere for a long period in order to avoid water and foreign particles entering into the refrigerant cycle. After removing the compressor, replace it quickly. If it is exposed to the ambiance for a long period, seal both suction and discharge pipes.
  • Page 369 10 Servicing 7. Vibration-Proof rubber 1. Fixation of the compressor to the bottom plate Compressor position Vibration-proof rubber 1 Vibration-proof rubber 2 — — — — ¿ Opening electrical box (P-mounting plate) Remove the service cover according to the section Removing service cover, see on page 355 in this chapter.

  • Page 370: Removing Reversing Valve

    10 Servicing ¿ Removing expansion valve coil Remove the service cover according to the section Removing service cover, see on page 355 in this chapter. Open the P-mounting plate according to the section Opening electrical box (P-mounting plate), see on page 361 in this chapter .
  • Page 371 10 Servicing 1. Brazing. 2. Reversing valve. 3. Mounting plate. 4. Screw. 5. Compressor. 6. Cover by wet cloth. ¿ Removing expansion valve Remove the service cover and rear service panel according to the sections Removing service cover, see on page 355 and Removing bottom service cover and rear cover, see on page 355.
  • Page 372 10 Servicing ¿ Remove the electrical components D A N G E R • Do not touch the electrical components of the PCB directly. • When handling the PCB, take care of components. Do not apply excessive force to them, in order to avoid damaging the motherboard and failures.
  • Page 373 10 Servicing ¿ Removing "W" electrical componets surface Remove the service cover according to the section Removing service cover, see on page 355 in this chapter. Open the P-mounting plate by rotating 90 degrees to the left according to the section Opening electrical box (P-mounting plate), see on page 361 in this chapter.

  • Page 374: Outdoor Units Ras-(4-6)H(V)Rnm1E

    10 Servicing • Remove the noise filter by clamping the top of the holder (6 portions) with a pincher. • Identify the terminal numbers with mark band. When reassembling, the terminals have to be connected to the correct numbers . If incorrectly connected, malfunctions or damages will occur. 10.2.2 Outdoor units RAS-(4-6)H(V)RNM1E ¿...
  • Page 375 10 Servicing ¿ Removing upper cover Remove all the screws fixing the upper cover, both on the front and back of the machine. Lift the upper cover upwards. 1. Upper cover. ¿ Removing the lower part of service panel and rear panel Remove the five (5) fixing screws at the lower part of the service panel and remove the lower part of the service panel by pulling towards the front side.
  • Page 376 10 Servicing If the fan blade get stuck when trying to remove it, use a puller to disassembly the fan. 1. Fan motor lead wire. 2. Motor clamp. 1. Upper cover. 3. Fan Motor. 4. Screw with spacer. Fan components and technical features 230V/50Hz Power supply 400V/50Hz...
  • Page 377 10 Servicing 1. Partition plate. 2. Cord holder or cable tie. 3. Rubber bush. 4. Install DC motor to this position facing down the trap. Fix the motor wire with the cable tie or the cord clamp. If not, it may cause the disconnection of the fan motor’s lead wire.
  • Page 378 10 Servicing 1. Sound-proof cover. 2. Oil heater. 3. Cut part. 4. Direction to remove the cover. 1. Thermistor holder. 2. Holder. 3. Td Thermistor. 4. Thermistor fixing plate. SMGB0060 rev. 1- 12/2010...
  • Page 379 10 Servicing 5. Rubber cap Th Thermistor. 6. Indication of terminal number. 7. Terminal box cover. 8. Compressor. 9. Compressor wires. 10. Fix it with screw. 11. Compressor wires (3 wires). A. Details for compressor terminals. N O T E •...
  • Page 380 10 Servicing 1. Suction pipe. 2. Discharge pipe. 3. Cover pipes with wet cloth. 4. See compressor position table below. 5. Vibration-Proof rubber 2. 6. Nut and washer. 7. Vibration-Proof rubber 1. Fixation of the compressor to the bottom plate Compressor position Vibration-proof rubber 1 Vibration-proof rubber 2...
  • Page 381 10 Servicing ¿ Removing high pressure switch and control pressure switch Remove the service cover according to the section Removing service cover, see on page 366 in this chapter Collect the refrigerant from the check joint according to the section Removing the compressor, see on page 369 in this chapter.
  • Page 382 10 Servicing D A N G E R • Check that the LED201 (red) located on the “W” surface PCB is OFF when opening the P-mounting plate. • Do not touch the electrical components when LED201 (Red) located on the “W” surface PCB is ON in order to avoid an electrical shock.
  • Page 383 10 Servicing ¿ Removing expansion valve coil Remove the service cover according to the section Removing service cover, see on page 366 in this chapter. Open the P-mounting plate according to the section Opening electrical box (P-mounting plate), see on page 373 in this chapter .
  • Page 384 10 Servicing 1. Brazing. 2. Reversing valve. 3. Mounting plate. 4. Screw. 5. Compressor. 6. Cover by wet cloth. ¿ Removing expansion valve Remove the service cover and rear service panel according to the section Removing service cover, see on page 366 Removing the lower part of service panel and rear panel, see on page 367.
  • Page 385 10 Servicing ¿ Removing electrical components D A N G E R • Do not touch the electrical components of the PCB directly. • When handling the PCB, take care of components. Do not apply excessive force to them, in order to avoid damaging the motherboard and failures.
  • Page 386 10 Servicing ¿ Removing "W" electrical components surface Remove the service cover according to the section Removing service cover, see on page 366 in this chapter. Open the P-mounting plate by rotating 90 degrees to the left according to the section Opening electrical box (P-mounting plate), see on page 373 in this chapter.

  • Page 387: Oudoor Units Ras-(8-12)Hrnm

    10 Servicing Check to ensure the LED201 (Red) of the inverter PCB is off when opening P-mounting plate. Remove other electrical components according to the procedure below, and the figures on Chapter 10. D A N G E R • Check that the LED201 (red) located on the “W”...
  • Page 388 10 Servicing ¿ Removing air outlet grille Remove the eight (8) fixing screws. Lift the air outlet grille holding the lower parts. Release the extruded hook of the air outlet grille from the shroud. 1. Air outlet grille. 2. Shroud. ¿...
  • Page 389 10 Servicing ¿ Removing the lower part of service panel and rear panel Remove the five (5) fixing screws at the lower part of the service panel and remove the lower part of the service panel by pulling towards the front side. Remove the upper cover according to section Removing upper cover, see on page 380 in this chapter.
  • Page 390 10 Servicing Fan components and technical features Power supply 380-415V/50Hz Fan Motor Comp. DC Fan Motor PCB5 PCN203 (1, 3) CN201 (2, 3, 4) AC Fan Motor PCB3 PCN404 (White) Screw for motor DC Fan Motor 4 x M6 screw (with spacer) fixing.
  • Page 391 10 Servicing ¿ Removing the compressor Remove the service cover and the lower part of the service panel according to the sections Removing service cover, see on page 379 and the section Removing the lower part of service panel and rear panel, see on page 381.
  • Page 392 10 Servicing 1. Thermistor holder. 2. Holder. 3. Td Thermistor. 4. Thermistor fixing plate. 5. Rubber cap Th Thermistor. 6. Indication of terminal number. 7. Terminal box cover. 8. Compressor. 9. Compressor wires. 10. Fix it with screw. 11. Compressor wires (3 wires). SMGB0060 rev.
  • Page 393 10 Servicing A. Details for compressor terminals. N O T E • Do not expose the refrigerant cycle to the atmosphere for a long period in order to avoid water and foreign particles entering into the refrigerant cycle. After removing the compressor, replace it quickly. If it is exposed to the ambiance for a long period, seal both suction and discharge pipes.
  • Page 394 10 Servicing Fixation of the compressor to the bottom plate Compressor position Vibration-proof rubber 1 Vibration-proof rubber 2 — — — — ¿ Removing high pressure switch and control pressure switch Remove the service cover according to the section Removing service cover, see on page 379 in this chapter Collect the refrigerant from the check joint according to the...
  • Page 395 10 Servicing ¿ Opening electrical box (P-mounting plate) Remove the service cover according to the section Removing service cover, see on page 379 in this chapter. • Remove the six (6) screws fixing the electrical box. Open the P-mounting plate by rotating it 90 degrees to the left. 1.
  • Page 396 10 Servicing 380-415V/50Hz, 380V/60Hz 1: PCN7 (SVA2) 2: PCN6 (RVR) 3: PCN402 (SVA1, SVF) N O T E • Do not touch the electrical components when the LED201 (Red), located on surface “W” PCB is ON in order to avoid electrical shock. •...
  • Page 397 10 Servicing ¿ Removing reversing valve Remove the service cover and the rear service panel according to the section Removing service cover, see on page 379 and Removing the lower part of service panel and rear panel, see on page 381 in this chapter. Collect the refrigerant from the check joint according to the section Removing the compressor, see on page 383.
  • Page 398 10 Servicing • Electronic Expansion Valve (EV0): 2 brazing parts. • Perform the brazing to remove and reassemble the electronic expansion valve by cooling with wet cloth. • Protect the connecting wires and pipe insulation from brazing flame. 1. Expansion valve (EV0). 2.
  • Page 399 10 Servicing ¿ Removing electrical components D A N G E R • Check that the LED201 (red) located on the “W” surface PCB is OFF when opening the P-mounting plate. • Do not touch the electrical components when LED201 (red) located on “W” surface PCB is ON in order to avoid an electrical shock.
  • Page 400 10 Servicing ¿ Removing inverter components Remove the service cover according to the section Removing service cover, see on page 366 in this chapter. Open the P-mounting plate by rotating 90 degrees to the left according to the section Opening electrical box (P-mounting plate), see on page 387 in this chapter.
  • Page 401 10 Servicing N O T E • Identify the terminal numbers with mark band. When reassembling, the terminals have to be connected to the correct numbers . If incorrectly connected, malfunctions or damages will occur. • Check to ensure that the electrical wires will not be caught between the assembled electrical components and the mounting plates when the PCB2 is reassembled.
  • Page 402 10 Servicing ¿ Removing other electrical components Remove the service cover according to the section Removing service cover, see on page 379 in this chapter. Open the P-mounting plate by rotating it 90 degrees to the left according to the section Opening electrical box (P- mounting plate), see on page 387 in this chapter.

  • Page 403: Servicing For Es Series

    10 Servicing 10.3 Servicing for ES Series 10.3.1 Outdoor Units RAS-(2/2.5)HVRN1(E) and RAS-3HVRNS ¿ Removing pipe cover Follow the procedure below to remove main parts and components. For mounting, follow the reverse procedure of removal. Do not expose the refrigerant cycle to the atmosphere for a long period to avoid moisture or dust entering into the cycle. Be sure to replace parts immediately after removing.
  • Page 404 10 Servicing Remove the electrical box cover. Remove the fan motor connector (CN24) inserted into the PCB in the electrical box. Remove the fan motor lead wire fixed onto the motor clamp using a cord band. Remove four (4) screws which fixes the motor. 1.
  • Page 405 10 Servicing 1. Electrical box. 2. Heat exchanger. 3. Compressor-top thermistor. 4. Compressor wiring. 5. Terminal cover. 6. Side cover Soundproof cover. Open the soundproof cover wrapped around the compressor and remove the terminal box cover of the compressor body. Disconnect the compressor wires in the terminal box and remove the thermistor on top of the compressor. •...
  • Page 406 10 Servicing Remove push nuts A and B which fixes the compressor. Lift the compressor and remove from the unit body. (C in the figure does not have a push nut). Check if the Faston terminal has any abnormality when replacing the compressor. (Ensure the pull out force greater than 20 N) If the Faston terminal is identified faulty, replace to a new one.
  • Page 407 10 Servicing 1. High pressure switch. 2. Pressure switch for control. 3. Brazing. ¿ Removing four-way valve coil Remove the pipe cover following Removing pipe cover, see on page 395. Remove three (3) fixing screws and remove the upper cover. Remove the front cover following Removing front cover, see on page 395.
  • Page 408 10 Servicing Remove the CN5A connector on the control PCB of the electrical box. Hold and disconnect the coil of the expansion valve. The expansion valve coil is equipped with a lock mechanism. Ensure that the coil is locked when replacing. 1.
  • Page 409 10 Servicing 1. Electrical box cover. 2. Two screws. Removing Display PCB Remove the pipe cover following Removing pipe cover, see on page 395. Remove one (1) fixing screw and remove the terminal cover. Disconnect all the wiring connected to the display PCB. Hold the upper part of four (4) holders with long nose pliers and remove the display PCB.

  • Page 410: Outdoor Units Ras-(4-6)Hvrns1E

    10 Servicing Remove the electrical box cover. Removing Electrical Components. Remove the fixing screw and remove the reactor. • To mount components, be sure to match the wiring connection with the mark band codes. 1. Electrical box cover. 2. Partition plate. 3.
  • Page 411 10 Servicing Pull downward and remove the service cover after removing three (3) upper and lower fixing screws. • Pay attention not to drop the service cover. 1. Service cover. ¿ Remove outlet grille Remove four (4) screws which fix the outlet grille. 1.
  • Page 412 10 Servicing ¿ Removing bottom service cover and rear cover Remove five (5) screws which fix the bottom service cover. Pull and remove the bottom service cover. Remove the upper cover following Removing upper cover, see on page 403. Remove seven (7) screws which fix the rear cover (eight (8) screws for two-fan models; the inlet grill is fixed with four (4)).
  • Page 413 10 Servicing To remove the propeller fan, remove the cap nut and washer which fix the propeller fan onto the motor shaft. (Use a puller when the propeller fan and motor shaft are fixed too tightly). 1. Fan motor lead wire. 2.
  • Page 414 10 Servicing Remove four (4) screws which fix the electrical box. Pull up and remove the electrical box. 1. Electrical box. 2. Upper cover. 3. Compressor. N O T E • Wiring must be removed to dismount the electrical box. Remove the 4-way valve coil from the 4-way valve.
  • Page 415 10 Servicing ¿ Removing the compressor Remove the service cover, upper cover, bottom service cover and rear cover following Removing service cover, see on page 402, Removing upper cover, see on page 403 and Removing bottom service cover and rear cover, see on page 404.
  • Page 416 10 Servicing 1. Thermistor holder. 2. Holder. 3. Td Thermistor. 4. Thermistor fixing plate. 5. Rubber cap Th Thermistor. 6. Indication of terminal number. 7. Terminal box cover. 8. Compressor. 9. Compressor wires. 10. Fix it with screw. 11. Compressor wires (3 wires). A.
  • Page 417 10 Servicing Remove two (2) nuts which fix the compressor and remove the compressor. Lift the compressor and remove from the unit body. N O T E • To remove the compressor, the liquid stop valve pipe should be moved (bent) to the right side hand. PAY CLOSE ATTENTION not to crush to break the pipe.
  • Page 418 10 Servicing 1. Electrical box. 2. Upper cover. 3. Refrigerant amount controller. 4. Pressure switch for control. 5. High pressure switch. 6. Blazing. 7. Discharge pipe. ¿ Opening electrical box (P plate) Remove the service cover following Removing service cover, see on page 402 in this chapter. Remove six (5) screws which fix the electrical box, and open the P plate turning counter clockwise approximately 90°.
  • Page 419 10 Servicing 1. 4-way valve coil. 2. 4-way valve coil screw. ¿ Removing electronic expansion valve coil Remove the service cover following Removing service cover, see on page 402. Open the P plate following Opening electrical box (P plate), see on page 410. •...
  • Page 420 10 Servicing ¿ Removing solenoid valve coil (20A) Remove the service cover following Removing service cover, see on page 366. Remove one (1) screw and remove the solenoid valve upward. 1. Solenoid valve coil screw. 2. Solenoid valve coil. 3. Solenoid valve. ¿...
  • Page 421 10 Servicing Removing DIP-IPM Remove the service cover following Removing service cover, see on page 402. Open the P plate turning counter clockwise approximately 90°, following Opening electrical box (P plate), see on page 410. • Check that the LED201 (red) on DIP-IPM is OFF when the P plate is opened. D A N G E R •...

  • Page 422: Outdoor Units Ras-(8/10)Hrnse

    10 Servicing To mount components, be sure to match the wiring connection with the mark band codes. View from P 10.3.3 Outdoor Units RAS-(8/10)HRNSE ¿ Removing service cover N O T E Follow the procedure below to remove main parts and components. For mounting, follow the reverse procedure of removal.
  • Page 423 10 Servicing ¿ Removing air outlet grille Remove the eight (8) fixing screws of the shroud. 1. Air outlet grille. 2. Shroud. ¿ Removing upper cover Remove nine (9) screws fixing the upper cover and remove the upper cover upward. 1.
  • Page 424 10 Servicing 1. Air outlet grille. 2. Rear cover. 3. Lower part of service cover. 4. Fixing portion for outdoor temperature thermistor. 5. Air inlet grille (rear side). 6. Pull N O T E • DO NOT touch electrical components while the LED1 (Red) is ON to avoid electrical shock. Wait until the LED turns off.
  • Page 425 10 Servicing Remove four (4) screws which fix the motor. Reassemble the parts in the reverse order of removing procedures. Model RAS-8/10HRNSE PCB5 DC Fan Motor PCN203 (White) CN201 (White) Fan Motor Comp. Nº PCB3 AC Fan Motor PCN404 (White) DC Fan Motor 4 x M6 screw (with spacer) Screw for motor...
  • Page 426 10 Servicing 1. Motor clamp. 2. Fix the motor lead wires by the cord clamp. 3. Rubber Bush. 4. Pass the motor lead wires through the square hole of the electrical box. 5. Electrical Box. 6. Pass the motor lead wires through the harness lifter and connect them to the PCB3 (for MOF1) and PCB5 (for MOF2). 7.
  • Page 427 10 Servicing Remove the solenoid valve coil from the solenoid valve. : Removing Electronic expansion Valve and Solenoid Valve, see on page 426. Remove the Faston terminals of high pressure switch and the pressure switch for control from the switch body.
  • Page 428 10 Servicing Remove the crankcase heater. 1. Sound-proof cover. 2. Oil heater. 3. Cut part. A. Direction to remove the cover. 1. Thermistor holder 2. Holder 3. Td Thermistor 4. Thermistor fixing plate 5. Rubber cap Th Thermistor 6. Indication of terminal number SMGB0060 rev.
  • Page 429 10 Servicing 7. Terminal box cover 8. Compressor 9. Compressor wires 10. Fix it with screw 11. Compressor wires (3 wires) A. Details for compressor terminals N O T E • Compressor piping must be connected by brazing. MAKE SURE that any flammable material is not around before heating with burner, for the oil inside the piping may flame up.
  • Page 430 10 Servicing 7. Vibration-Proof rubber 1. N O T E • Fix the lead wire for the compressor firmly not to contact with metal sheet edge and high temperature piping. Fixation of the compressor to the bottom plate Compressor position Vibration-proof rubber 1 Vibration-proof rubber 2 —...
  • Page 431 10 Servicing ¿ Opening electrical box (P-Mounting Plate) Remove the service cover following Removing service cover, see on page 414. Remove six (6) screws which fix the electrical box, and open the P plate turning counter clockwise approximately 90°. • Check that the LED201 (red) on the inverter PCB (PCB2) is OFF when opening P-mounting plate.

  • Page 432: Removing Electronic Expansion Valve Coil

    10 Servicing Remove the connector (PCN6) on the control PCB (PCB1) of the electrical box. Remove the reversing valve coil by removing one (1) screw fixing the coil. 1. Upper cover. 2. Power Plate. 3. PCN6. 4. Fixing screw for reversing valve coil. 1.
  • Page 433 10 Servicing 1. CN5A. A. PCB1. N O T E • DO NOT touch electrical components while LED1 (Red) is ON to avoid electrical shock. Wait until the LED turns off. ¿ Removing solenoid valve coil (20A) Remove the service cover following Removing service cover, see on page 414.

  • Page 434: Removing Electronic Expansion Valve And Solenoid Valve

    10 Servicing Reassemble the parts in the reverse order of removing procedures. Details for Removing Band 1. Band (RAS-8HRNME Only) 2. Removing brazing part (Outdoor heat 1. Screw. exchange). 2. P. 3. Reversing Valve. 3. Silicon Plate. 4. Removing Brazing part (Gas stop valve).
  • Page 435 10 Servicing ¿ Removing electrical components Removing control PCB (PCB1) and Relay (PCB3, PCB5) Remove the service cover following Removing service cover, see on page 414. Remove all the wiring connected to the control PCB. Move the four (4) holders to the direction marked with the arrow and remove the PCB. Removing Relay PCB (PCB3, PCB5) Remove the service cover following the Removing service...
  • Page 436 10 Servicing Remove the four (4) M3 screws for the PCB2 and then remove the PCB2 from the transistor module. Remove the bushes and the collars from the PCB2. When remounting, attach those bushes and collars. Part Quantity P-Mounting Plate —...
  • Page 437 10 Servicing Check to ensure that the LED201 (Red) of the PCB2 is off. 1: 5 Screws (M5) 2: Fixing screw (M5) Removing Transistor Module (IPM) Disconnect all the wirings connected to the transistor module as shown below. Remove PCB2 from IPM according to the procedure of “Removing Inverter PCB (PCB2)”. Disconnect the wirings of P, N, U, V, W on the transistor module.
  • Page 438 10 Servicing Removing Capacitors (CB1, CB2) Disconnect all the wirings connected to the capacitors (CB1, CB2). The wire has the polar characters. Identify the wire mark band and the indication on the capacitor when wire connecting. Remove two (2) screws and two (2) saddles fixing the capacitor and remove each capacitor. Removing Magnetic Contactor (CMC1) Disconnect all the wirings connected to the magnetic contactor (CMC1).
  • Page 439 10 Servicing Part Quantity M4 Screw for CB1 — M4 Screw for DLC — M4 Screw for CMC1 CMC1 — M4 Screw for Resistor — — CB-Mounting Plate — — — — M4 Screw for Resistor — — M4 Screw for CB2 Saddle —...
  • Page 440 10 Servicing SMGB0060 rev. 1- 12/2010...

  • Page 441: Electrical Checks Of Main Parts

    11 Electrical checks of main parts . E l e c t r i c a l c h e c k s o f m a i n p a r t s Index 11.1 Inverter............................11.1.1 Inverter for IVX Series........................434 11.1.2 Inverter for ES Series........................

  • Page 442: Inverter

    11 Electrical checks of main parts 11.1 Inverter 11.1.1 Inverter for IVX Series ¿ Specifications of inverter Applicable model RAS-(4-12)HRNM(1)(E) RAS-(3-6)HVRNM(1)E 3 Phase 400V, 50 Hz RAS-(4-6)HRNM1E Applicable power source 1 Phase. 230V, 50 Hz 3 Phase 380-415V, 50 Hz RAS-(8-12)HRNM Input current RAS-(4-12)HRNM(1)(E) 6-25A RAS-(3-6)HVRNM(1)E 15-30A...
  • Page 443 11 Electrical checks of main parts Protection function Applicable model RAS-(4-12)HRNM(1)(E) RAS-(3-6)HVRNM(1)E Excessive low voltage at a voltage is lower than Excessive low voltage at a voltage is lower than 350 V DC 194 V DC Excessive high or low voltage for inverter Excessive high voltage at a voltage is higher than Excessive high voltage at a voltage is higher than 750 V DC...
  • Page 444 11 Electrical checks of main parts ¿ Inverter time chart 1. Main circuit power source. 2. Frequency instruction. 3. Output voltage. 4. Soft start-stop (frequency). 5. Failure signal. 6. Activation of protection device. 7. Overload signal. 8. Charged indication. A. Frequency HIGH. B.
  • Page 445 11 Electrical checks of main parts ¿ Protective function Excessive high or low voltage for inverter Level of detection • When the voltage of direct current is greater than (A) V, abnormalities are detected. • When the voltage of direct current is smaller than (B) V, abnormalities are detected. Power supply 400V, 50Hz / 380-415V, 50Hz 230V, 50Hz...
  • Page 446 11 Electrical checks of main parts Fin temperature increase Level of detection When the temperature of internal thermistor exceeds more than 100 ºC, an abnormality is detected. Function When abnormalities are detected, the inverter compressor is stopped and the signal code of stoppage cause is transmitted to PCB1.

  • Page 447: Inverter For Es Series

    11 Electrical checks of main parts 11.1.2 Inverter for ES Series ¿ Specifications of inverter Applicable model RAS-(2-3)HVRN1(E)(S) RAS-(4-6)HVRNS1E RAS-(8/10)HRNSE Applicable power source 1 Phase. 220-240V 50 Hz 1 Phase. 230V, 50 Hz 3 Phase 400V, 50 Hz Output current 10.5A 17A (4 HP), 25A(5/6HP) Control Method...
  • Page 448 11 Electrical checks of main parts Protection function Applicable model RAS-(2-3)HVRN1(E)(S) RAS-(4-6)HVRNS1E RAS-(8/10)HRNSE Excessive low voltage at a voltage is lower than Excessive low voltage at a voltage is 194 V DC lower than 350 V DC Excessive high or low voltage for inverter Excessive high voltage at a voltage is higher than Excessive high voltage at a voltage is...
  • Page 449 11 Electrical checks of main parts Protection function Applicable model RAS-(2-3)HVRN1(E)(S) RAS-(4-6)HVRNS1E RAS-(8/10)HRNSE IPM has four protection function for self-protection. Some of the output terminals between "U" and "V", "V" and "W", "W" and "U" has a short- circuit. Protection of IPM Running current reaches the maximum rated current.
  • Page 450 11 Electrical checks of main parts ¿ Inverter time chart 1. Main circuit power source. 2. Frequency instruction. 3. Output voltage. 4. Soft start-stop (frequency). 5. Failure signal. 6. Activation of protection device. 7. Overload signal. 8. Charged indication. A. Frequency HIGH. B.
  • Page 451 11 Electrical checks of main parts ¿ Protective function Excessive high or low voltage for inverter Level of detection • When the voltage of direct current is greater than (A) V, abnormalities are detected. • When the voltage of direct current is smaller than (B) V, abnormalities are detected. Power supply 230V, 50Hz 400V, 50Hz...
  • Page 452 11 Electrical checks of main parts Fin temperature increase Level of detection When the temperature of internal thermistor exceeds more than 100 ºC, an abnormality is detected. Function When abnormalities are detected, the inverter compressor is stopped and the signal code of stoppage cause is transmitted to PCB1.

  • Page 453: Thermistor

    11 Electrical checks of main parts 11.2 Thermistor Thermistors for the outdoor unit 1. Thermistor for discharge gas temperature (THM9). 2. Thermistor for outdoor ambient temperature (THM7). 3. Thermistor for evaporating temperature (THM8). Thermistor for upper part temperature of compressor (For prevention of discharge gas overheating) A thermistor for the upper part temperature of the compressor is installed to prevent discharge gas from overheating.
  • Page 454 11 Electrical checks of main parts Operation Upper part temperature of compressor Defecting period Over 132 ºC 10 minutes (continuously) Cooling Over 140 ºC 5 seconds (continuously) Over 132 ºC 10 minutes (continuously) Heating Over 140 ºC 5 seconds (continuously) Defrosting Over 132 ºC 5 seconds (continuously)

  • Page 455: Electronic Expansion Valve

    11 Electrical checks of main parts 11.3 Electronic expansion valve Micro-computer Pulse signal 2-Phase permanent magnetic pulse motor Control 0 to 500 pulse by 1 pulse Refrigerant flow control 1. Pulse motor. Precise control 2. Needle. Items Specifications Applicable to the models For the main cycle of: For IVX RAS-(4-12)H(V)RNM(1)(E) and ES RAS-(4-10)H(V)RNS(1)E Type UKV(10.0 USRT) series/UKV (5.0USRT) series for MVB...

  • Page 456: High Pressure Protection Device

    11 Electrical checks of main parts 11.4 High pressure protection device If the discharge pressure is excessively high, the compressor and the component parts of the refrigeration cycle can be damaged. Therefore, in case that the discharge pressure is higher than 4.15 MPa (R410A), the protection control is activated and the compressor is stopped.

  • Page 457: Noise Filter (Nf)

    11 Electrical checks of main parts 11.5 Noise filter (NF) 11.5.1 Noise filter for IVX Series The noise filter decreases the leakage of noise made by the inverter to the power supply side. Terminals indicated with “LOAD” are connected to the inverter side and terminals indicated with “LINE” to the power supply side. RAS-(4-6)HVRNM1E (230V/50Hz), RAS-(4-6)HRNM1E (400V/50Hz), RAS-(8-12)HRNM (380-415V/50Hz) Items Specifications...

  • Page 458: Noise Filter For Es Series

    11 Electrical checks of main parts 11.5.2 Noise filter for ES Series The noise filter decreases the leakage of noise made by the inverter to the power supply side. Terminals indicated with “LOAD” are connected to the inverter side and terminals indicated with “LINE” to the power supply side. RAS-(4-6)HVRNS1E (230V/50Hz) Items Specifications...
  • Page 459 11 Electrical checks of main parts RAS-(8/10)HRNSE (400V/50Hz) Items Specifications Model 4LFB-16830-2F Rated current AC400V 30 A Permissible temperature range -25 ºC to 85 ºC Circuit diagram SMGB0060 rev. 1- 12/2010...

  • Page 460: Capacitor (Cb1, Cb2)

    11 Electrical checks of main parts 11.6 Capacitor (CB1, CB2) This part is used for changing the alternative current to the direct current for the inverter. Connect two capacitor in line and used. Items Specifications Models LNX2G472MSEAHE 4700 μF Capacity of static electricity Rated voltage 400 VDC Permissible temperature range...

  • Page 461: Reactor (Dcl)

    11 Electrical checks of main parts 11.7 Reactor (DCL) 11.7.1 Reactor (DCL) for IVX Series This part is used for changing the alternative current to the direct current for the inverter. RAS-(4-6)HRNM1E (400V/50Hz), RAS-(8-12)HRNM (380-415V/50Hz) Items Specifications Character 1.0 mH+10% (at 1 kHz) Rated current 30 A Direct resistance...
  • Page 462 11 Electrical checks of main parts RAS-(8/10)HRNSE (400V/50Hz) Items Specifications Character 1.0 mH±10% (at 1 kHz) Rated current 30 A DC Resistance 22.8 mΩ (at 20 °C) Permissible temperature range -20 ºC to 60 ºC SMGB0060 rev. 1- 12/2010...

  • Page 463: Scroll Compressor

    11 Electrical checks of main parts 11.8 Scroll compressor 11.8.1 Reliable mechanism for low vibrating and low sound The rotating direction is definite. The pressure inside of the chamber is high pressure, and the surface temperature of the chamber is 60 °C to 110 °C. 11.8.2 Principle of compression 1.
  • Page 464 11 Electrical checks of main parts SMGB0060 rev. 1- 12/2010...

  • Page 465: Maintenace Notes

    12 Maintenace notes . M a i n t e n a c e n o t e s Index 12.1 Checking the power source and the wiring connection.............. 12.2 Burnt-out compressor due to an insufficient refrigerant charge..........12.3 Insufficient cooling performance when a long piping is applied..........12.4 Abnormally high operation sound (in the ceiling type indoor unit)..........

  • Page 466: Checking The Power Source And The Wiring Connection

    12 Maintenace notes 12.1 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 Check the secondary voltage of the breaker and the fuse by means of a tester. out? Disconnect the secondary side of the transformer and check the voltage by means of a tester.

  • Page 467: Burnt-Out Compressor Due To An Insufficient Refrigerant Charge

    12 Maintenace notes 12.2 Burnt-out compressor due to an insufficient refrigerant charge Question and answer for the field work Example 1: Burnt-out compressor due to an insufficient refrigerant charge After commissioning, the alarm code "08" sometimes occurred and the compressors were burnt out after operating for two Phenomenon months.

  • Page 468: Insufficient Cooling Performance When A Long Piping Is Applied

    12 Maintenace notes 12.3 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. If the location of an outdoor unit is 20 meters lower than the location of the indoor units, resetting of the DIP switch DSW3 is required.

  • Page 469: Abnormally High Operation Sound (In The Ceiling Type Indoor Unit)

    12 Maintenace notes 12.4 Abnormally high operation sound (in the ceiling type indoor unit). Question and answer for the field work Example 3: Abnormally high operation sound (in-the-ceiling type indoor unit) Phenomenon The operation sound at the "HIGH" speed was abnormally high. The indoor units were installed without the ducts.

  • Page 470: Alarm Code "31

    12 Maintenace notes 12.5 Alarm code "31" Question and answer for the field work 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. Power Source Cause...

  • Page 471: Not Cooling Well Due To Insufficient Installation Space For The Outdoor Unit

    12 Maintenace notes 12.6 Not cooling well due to insufficient installation space for the outdoor unit Question and answer for the field work Example 5: Not cooling well due to insufficient installation space for outdoor unit Cooling operation was well performed through the intermediate season. However, the cooling operation was not well available Phenomenon when the outdoor temperature was higher than 35 °C.

  • Page 472: Caution With The Refrigerant Leakage

    12 Maintenace notes 12.7 Caution with the refrigerant leakage The designers and the installers have the responsibility to follow the local codes and the local regulations that specify the safety requirement against the refrigerant leakage. 12.7.1 Maximum permissible concentration of the HCFC gas The refrigerant R410A, which is charged in the UTOPIA IVX/ES system, is an incombustible non-toxic gas.

  • Page 473: Maintenance Work

    12 Maintenace notes 12.8 Maintenance work For the indoor unit and the outdoor unit Fan and fan motor • Lubrication: All the fan motors are pre-lubricated and sealed at the factory. Therefore, no lubrication maintenance is required. • Sound and vibration: Check for abnormal sounds and vibrations. •...

  • Page 474: Service And Maintenance Record

    12 Maintenace notes 12.9 Service and maintenance record Check item Action Judgement Is the service area sufficient? — Is there a short circuit of the discharged air? — Any heat influence? — Is the ground wire connected? — Refrigerant piping. —...
  • Page 475 12 Maintenace notes Check item Action Judgement Instructions to the client about the cleaning — Done Not yet method. Instructions to the client about the operation. — Done Not yet SMGB0060 rev. 1- 12/2010...

  • Page 476: Service And Maintenance Record Using The 7-Segment Display

    12 Maintenace notes 12.10 Service and maintenance record using the 7-segment display Customer’s name:________________________________ Date:____________________ Outdoor unit model (serial No. ) RAS- (Serial No. ) RAS- (Serial No. ) 1. Operation mode 2. Test run start time 3. Data collect start time 4.
  • Page 477 12 Maintenace notes Customer’s name:________________________________ Date:____________________ Outdoor unit model (serial No. ) RAS- (Serial No. ) RAS- (Serial No. ) 8.1 I.U. expansion valve opening 8.2 Liquid pipe temp. of I.U. (Freeze protection) 8.3 I.U. intake air temp. 8.4 I.U. discharge air temp. 8.5 Cause of I.U.

  • Page 478: Service And Maintenance Record By Remote Control Switch

    12 Maintenace notes 12.11 Service and maintenance record by remote control switch Data sheet for checking by remote control switch Time I.U. modelo I.U. serial No. I.U. No. / alarm code Check Check 1·2 1·2 1·2 1·2 1·2 mode 1 mode 2 B Temp.
  • Page 479 12 Maintenace notes L Opening of ex. valve I.U. ex. valve O.U. ex. valve 1 O.U. ex. valve 2 O.U. ex. valve B P Running current indication (reference) Comp. current SMGB0060 rev. 1- 12/2010...

  • Page 480: Pump-Down Method For Replacing The Compressor

    12 Maintenace notes 12.12 Pump-down method for replacing the compressor Procedure Remarks Turn off the main switch of the outdoor unit. Remove the covers, the thermistor, the crankcase heater, the power Make sure that the terminal part of the detached power supply wires wirings, and other items according to the chapter 10.
  • Page 482 Hitachi Air Conditioning Products Europe, S.A. Ronda Shimizu, 1 - Polig. Ind. Can Torrella 08233 Vacarisses (Barcelona) Spain Hitachi certifies that our products have met EU consumer safety, health and environmental requirements. Hitachi Air Conditioning Products Europe, S.A. is certified with:...

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