Hitachi air365 Max Series Installation & Maintenance Manual
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Hitachi air365 Max Series Installation & Maintenance Manual

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INSTALLATION
& MAINTENANCE
MANUAL
–
INVERTER-DRIVEN
AIR CONDITIONERS
SET FREE
OUTDOOR UNITS
MODELS
<BASE UNITS>
COOLING ONLY
(Standard Type)
RAS-080CNCCLW TO RAS-300CNCCLW
EN INSTALLATION & MAINTENANCE MANUAL
Original Instructions
A1638IN3TL
Max SERIES
Scan the code to get the electronic manual.

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Summary of Contents for Hitachi air365 Max Series

  • Page 1 – INSTALLATION & MAINTENANCE MANUAL – INVERTER-DRIVEN AIR CONDITIONERS SET FREE Max SERIES OUTDOOR UNITS MODELS <BASE UNITS> COOLING ONLY (Standard Type) RAS-080CNCCLW TO RAS-300CNCCLW EN INSTALLATION & MAINTENANCE MANUAL Original Instructions Scan the code to get the electronic manual. A1638IN3TL...
  • Page 2 Models Models *1. The maximum operating temperature for cooling operation of the Cooling Only type is 48 °C (52 °C). Applicable Models The temperatures in parenthesis indicate the temporary maximum operating temperatures. Cooling Only Cooling Only • Temporary high ambient operation is allowed RAS-080CNCCLW 20HP RAS-200CNCCLW...

  • Page 3: Important Notice

    Installation and Maintenance Manual and the European Standard, EN 378). No part of this Operation Manual. manual may be reproduced in any way without the expressed written consent of Hitachi- Product Inspection upon Arrival Johnson Controls Air Conditioning. • This air conditioner is designed for standard air 1.

  • Page 4: Table Of Contents

    TABLE OF CONTENTS Models .............................. i IMPORTANT NOTICE ........................ii 1. Safety Summary ......................... 1 2. Before Installation ........................8 2.1 About This Product ........................ 8 2.2 Line-Up of Outdoor Units ..................... 10 2.3 Combination of Indoor Unit and Outdoor Unit ..............12 2.4 Piping Connection Kit (Optional) between Outdoor Units..........

  • Page 5: Safety Summary

    • Use only recommended/standardized or described in this manual. Unauthorized replacement parts provided by Hitachi- modifications to Hitachi-Johnson Controls Air Johnson Controls Air Conditioning. Conditioning products are prohibited as they: •...
  • Page 6 1. Safety Summary air filter is attached (removed), hold them numbers within a system must have the same firmly. If not, it may cause falling or injury. (only version of software. for wall mounted type) Follow these steps to verify that your product •...
  • Page 7 1. Safety Summary even the specialized units cannot be used. above a kitchen stove. ○ Where oil (including machinery oil) may be These products should not be installed in such locations. present. • ○ Where corrosive gases such as chlorine, Do NOT install this unit in any place where silicon gases can coalesce.
  • Page 8 1. Safety Summary • toxic on contact and can cause suffocation in Air circulation should be optimized to achieve the immediate area. the best distribution pattern and not settled • Do NOT install this system in close proximity to into isolated pockets that can make people septic sewer lines where flammable and toxic uncomfortable.
  • Page 9 When installing the unit, and connecting that have been approved for use in the unit’s refrigerant piping, keep all piping runs as short intended home country or market. Hitachi- as possible, and make sure to securely connect Johnson Controls Air Conditioning distributors...
  • Page 10 1. Safety Summary Electrical Precautions installation should meet the requirements in each regional regulation. If refrigerant gas leaks during the installation work, ventilate the room WARNING immediately. • The refrigerant system may be damaged if To reduce the risk of serious injury or death, the slope of the piping connection kit exceeds the following refrigerant precautions must be +15˚.
  • Page 11 1. Safety Summary • • Insulate all electrical components and The installation of a residual current device connections from exposure to moisture. Failure (RCD) having a rated residual operating current to do so can result in an electrical short circuit not exceeding 30 mA is advisable.

  • Page 12: Before Installation

    2. Before Installation applied, proper bonding and termination of the allows the interconnection of the same indoor cable shield is required as per Hitachi-Johnson units for all the HITACHI systems. Controls Air Conditioning guidelines. Plenum This system provides the end user with greater...
  • Page 13 2. Before Installation • Necessary Tools and Instruments List for Installation Tool Tool Tool Handsaw Plier Cutter for Wires Phillips Screwdriver Pipe Cutter Gas Leak Detector Vacuum Pump Brazing Kit Leveller Refrigerant Gas Hose Hexagon Wrench Clamper for Solderless Terminals Megohmmeter Spanner Hoist (for Indoor Unit)

  • Page 14: Line-Up Of Outdoor Units

    2. Before Installation Interchangeability Reason of Non-Interchangeability and Attention with R22 Measuring Instrument and Tool (ʘ: Strictly Required) R410A R407C • Check refrigerant cylinder color. Refrigerant ʘ Liquid refrigerant charging is required Refrigerant Charging Cylinder regarding zeotropic refrigerant. ʘ The current ones are applicable. However, Vacuum Pump it is required to mount a vacuum pump Vacuum Pumping...
  • Page 15 2. Before Installation Model RAS-560CNCCLW RAS-580CNCCLW RAS-600CNCCLW RAS-620CNCCLW RAS-640CNCCLW RAS-660CNCCLW RAS-280CNCCLW RAS-300CNCCLW RAS-300CNCCLW RAS-220CNCCLW RAS-240CNCCLW RAS-240CNCCLW Combination RAS-280CNCCLW RAS-280CNCCLW RAS-300CNCCLW RAS-220CNCCLW RAS-220CNCCLW RAS-240CNCCLW RAS-180CNCCLW RAS-180CNCCLW RAS-180CNCCLW Model RAS-680CNCCLW RAS-700CNCCLW RAS-720CNCCLW RAS-740CNCCLW RAS-760CNCCLW RAS-780CNCCLW RAS-240CNCCLW RAS-240CNCCLW RAS-240CNCCLW RAS-260CNCCLW RAS-260CNCCLW RAS-260CNCCLW Combination RAS-220CNCCLW RAS-240CNCCLW RAS-240CNCCLW RAS-240CNCCLW RAS-260CNCCLW RAS-260CNCCLW RAS-220CNCCLW RAS-220CNCCLW RAS-240CNCCLW RAS-240CNCCLW RAS-240CNCCLW RAS-260CNCCLW Model...

  • Page 16: Combination Of Indoor Unit And Outdoor Unit

    2. Before Installation 2.3 Combination of Indoor Unit and Outdoor Unit The following indoor units can be combined with the HITACHI SET FREE "air365 Max" series outdoor unit. Table 2.1 Indoor Unit Type List Nominal Capacity Indoor Unit Type 0.4 0.6 0.7 0.8 0.9 1 1.1 1.3 1.5 1.6 1.8 2 2.3 2.5 3 3.3 3.6 4 4.5 5...

  • Page 17: Piping Connection Kit (Optional) Between Outdoor Units

    2. Before Installation NOTES: • The connectable indoor unit capacity ratio can be calculated as follows. Connectable Indoor Unit Capacity Ratio = Total Indoor Unit Capacity / Total Outdoor Unit Capacity • For the system under which all the indoor units are supposed to operate simultaneously, the total indoor unit capacity should be less than outdoor unit capacity.

  • Page 18: Multi-Kit (Optional) Between Indoor Unit And Outdoor Unit

    2. Before Installation 2.5 Multi-Kit (Optional) between Indoor Unit and Outdoor Unit MW - NP 282 A 3 1. Line Branch 2. Multi-Kit after First Branch First Branch Type of Generation (Standard Type) (Standard Type) Applicable System Outdoor Unit Total Indoor Unit A: for Heat Pump and Model Model...
  • Page 19 2. Before Installation Accessory 20HP 22HP 24HP 26HP 28HP 30HP Remarks Connection for ID ɸ25.6 → ID ɸ28.8 → ID ɸ28.8 → ID ɸ28.8 → Refrigerant Gas Pipe OD ɸ28.58 OD ɸ31.75 OD ɸ31.75 OD ɸ31.75 Accessory Pipe Connection for Refrigerant OD ɸ12.7 →...

  • Page 20: Selection Of Installation Location

    3. Selection of Installation Location 3. Selection of Installation Location NOTES: • Do not install the outdoor unit where there is a high level of oil mist, flammable gases, salty air WARNING or harmful gases such as sulfur and an acid or •...
  • Page 21 3. Selection of Installation Location • • In the case of no walls on the front side and Multiple / Serial Installation the rear side, the service space is required as (Unit: mm) follows. No limit for side wall height. ○...
  • Page 22 3. Selection of Installation Location • • Multiple / Serial Installation Multiple / Serial Installation (Unit: mm) (Unit: mm) < Installation in the Same Direction > <Installation in the Same Direction> Min. 300 + h1/2 Min. 300 + h1/2 Min.10 Min.

  • Page 23: Installation Work

    4. Installation Work 4. Installation Work Plastic Bands 4.1 Transportation and Handling Corrugated Paper Frame Attach four 15mm thick 4.1.1 Transportation corrugated corner pads Do not remove as shown. corrugated paper Transport the product as close to the installation frame and plastic bands.
  • Page 24 4. Installation Work 4.1.2 Handling of Outdoor Unit When using forklift, do not insert forks into the holes on the unit side. The unit may be damaged. • Hanging Method ○ Hang the unit under packing condition with 2 sling belts as shown in Fig. 4.1. ○...

  • Page 25: Outdoor Unit Installation

    4. Installation Work NOTE: Provide concrete foundation as shown in the figure. • In case of transportation after unpacking, Front Side Front Side of Unit of Unit protect the unit with corrugated paper boards or cloths. Correct Correct Foot Keep distance more than Foundation 50mm between the outdoor Outdoor Unit...
  • Page 26 4. Installation Work 4.2.2 Drain Water Treatment 5. When installing the outdoor unit, fix the unit with anchor bolts and vibration proof mat (field- Rain water is discharged during raining. supplied). Comply with the following conditions. Refer to Fig. 4.4 regarding the location of fixing holes.
  • Page 27 4. Installation Work • Standard Type (22 to 30 HP) (Unit: mm) Hole for Drain ( 26 x 2 Positions) Power Source Wiring Outlet Positions of Drain Cap ( 65 Knockout Hole) (Optional) Comm. Wiring Outlet ( 55 Knockout Hole) Comm.

  • Page 28: Refrigerant Piping Work

    5. Refrigerant Piping Work 5. Refrigerant Piping Work depending on its materials, so use the specified piping. If the specified materials are not used, it WARNING may cause explosion, injury, leakage, or fire. • Use the specified non-flammable refrigerant CAUTION R410A to the outdoor unit in the refrigerant cycle.
  • Page 29 5. Refrigerant Piping Work moisture from entering the pipe interior during 3. Use a quality brazing filler metal specified in JIS. the piping work. Select a flux whose chlorine concentration is low. 6. Avoid performing the piping connection work 4. Remove the flux completely after the brazing for outdoor unit in the rain.

  • Page 30: Flaring And Joint

    5. Refrigerant Piping Work • When tightening the flare nut, use two *1. When the liquid piping length is longer than 15m, spanners. use ɸ9.52 pipe and a reducer (field-supplied). *2. As for some of the indoor unit types, if ɸ12.7 pipe Required Tightening Torque (JIS B8607) is not available, ɸ15.88 pipe should be used.

  • Page 31: Caution About Outdoor Unit Installation

    5. Refrigerant Piping Work • 5.3 Caution about Outdoor Unit Joint Selection If 1/2H material is used, the flaring work cannot Installation be performed. In this case, use a joint selected When the installation and piping work for the from the table below. multiple outdoor units are performed, it is required <...

  • Page 32: Piping Connection Work

    5. Refrigerant Piping Work 5.4.1 Removing of Closing Pipes <Restrictions for 4 Unit Combination> 1. For 4 outdoor unit combination, align the Step1. Make sure that all the valve stems are outdoor units from largest capacity to smallest closed completely. as A >...
  • Page 33 5. Refrigerant Piping Work • <Liquid Valve> The details of stop valves is as follows. Tighten the flare nut for liquid stop valve according <Gas Valve> to the following torque. If an excessive force is applied to the flare nut, the refrigerant leakage (Check the shape) may occur from the spindle part.
  • Page 34 5. Refrigerant Piping Work 5.4.2 Piping Connection Method Perform the piping connection work for each outdoor unit. NOTE: • Ensure that the refrigerant pipe should be connected to the same refrigerant cycle unit. Prepare the refrigerant pipe in the field for the piping work. Refer to Fig.
  • Page 35 5. Refrigerant Piping Work • Piping Direction NOTICE Fix the pipes adequately in order to avoid vibration and excessive force to the valve. • After removing the pipes and completing Step1. The pipes can be installed in four insulation work, cover the gap between the pipe directions (front, rear, right or bottom side).
  • Page 36 5. Refrigerant Piping Work • When connecting the indoor unit and outdoor CAUTION unit refrigerant pipes, the refrigerant pipes must be supported appropriately. Do not let • Do not apply excessive force to the flare nut them come into contact with the weak strength when tightening it.
  • Page 37 5. Refrigerant Piping Work • Construction Example The following figures show the examples of 3 unit combination. Regarding the piping work for Combination Unit, refer to Installation and Maintenance Manual attached to the piping connection kit. Perform the piping connection between outdoor Front Side Piping Connection units according to this figure.

  • Page 38: Piping Work Between Outdoor Units

    5. Refrigerant Piping Work 5.5 Piping Work between Outdoor Units Outdoor Outdoor Outdoor Outdoor Unit Unit Unit Unit The optional piping connection kit is required to combine base units. It is NOT required for the base units. Indoor Unit Side <...
  • Page 39 5. Refrigerant Piping Work • Less than 2m CORRECT CORRECT Indoor Unit Indoor Unit Side Side Less than 2m Less than 2m INCORRECT Less than 2m Less than 2m • 2m or more Indoor Unit Side CORRECT Oil Trap Indoor Unit Oil Trap Oil Trap Min.
  • Page 40 5. Refrigerant Piping Work 5. For servicing, in case that the pipe is placed INCORRECT frontward of the outdoor unit, secure min. 500mm between the outdoor unit and piping connection kits. (When the compressor is Outdoor replaced, a space of min. 500mm is required.) Unit Outdoor Unit...
  • Page 41 5. Refrigerant Piping Work 5.5.1 Piping Size between Outdoor Units (Base Unit) • Standard Type: RAS-080 to 300CNCCLW Outdoor Unit Refrigerant Piping To Indoor Units Standard Type: RAS-080 to 300CNCCLW (ɸmm) RAS- RAS- RAS- RAS- RAS- RAS- RAS- Model 080CNCCLW 100CNCCLW 120CNCCLW 140CNCCLW...
  • Page 42 5. Refrigerant Piping Work Standard Type: RAS-320 to 600CNCCLW (ɸmm) RAS- RAS- RAS- RAS- RAS- RAS- RAS- Model 320CNCCLW 340CNCCLW 360CNCCLW 380CNCCLW 400CNCCLW 420CNCCLW 440CNCCLW RAS- RAS- RAS- RAS- RAS- RAS- RAS- Outdoor Unit A 180CNCCLW 180CNCCLW 180CNCCLW 220CNCCLW 220CNCCLW 240CNCCLW 220CNCCLW Comb.
  • Page 43 5. Refrigerant Piping Work Standard Type: RAS-620 to 900CNCCLW (φmm) RAS- RAS- RAS- RAS- RAS- RAS- RAS- Model 620CNCCLW 640CNCCLW 660CNCCLW 680CNCCLW 700CNCCLW 720CNCCLW 740CNCCLW RAS- RAS- RAS- RAS- RAS- RAS- RAS- Outdoor Unit A 220CNCCLW 240CNCCLW 240CNCCLW 240CNCCLW 240CNCCLW 240CNCCLW 260CNCCLW Combination...
  • Page 44 5. Refrigerant Piping Work 5.5.4 Piping Size between Outdoor Units (4 Unit Combination) • Standard Type: RAS-920 to H20CNCCLW (Indoor Unit on Left Side) Outdoor Unit A Outdoor Unit B Outdoor Unit C Outdoor Unit D Piping Connection Kit 1 Piping Connection Kit 2 Piping Connection Kit 3 To Indoor Units...
  • Page 45 5. Refrigerant Piping Work Standard Type: RAS-920 to H20CNCCLW (φmm) RAS- RAS- RAS- RAS- RAS- RAS- RAS- Model 920CNCCLW 940CNCCLW 960CNCCLW 980CNCCLW H00CNCCLW H02CNCCLW H04CNCCLW RAS- RAS- RAS- RAS- RAS- RAS- RAS- Outdoor Unit A 240CNCCLW 240CNCCLW 240CNCCLW 260CNCCLW 260CNCCLW 260CNCCLW 260CNCCLW RAS-...

  • Page 46: Piping Size, Piping Connection And Multi-Kit Selection

    5. Refrigerant Piping Work 5.6 Piping Size, Piping Connection and Multi-Kit Selection For selecting the pipe sizes between the outdoor unit and the piping connection kit , between the piping connection kits and for piping connection kit , refer to items from 5.5.1 to 5.5.4 “Piping Size between Outdoor Units”.
  • Page 47 5. Refrigerant Piping Work Piping Size (ɸmm) < Example 1 > Line Branch (Including Main Pipe Branch) Main Pipe Diameter (Base Unit or Piping Connection Kit 1 to First Branch) [Multi-Kit of First Branch] Outdoor Unit A < 2 Pipes System > (Standard Type) (φmm) Outdoor Unit HP...
  • Page 48 5. Refrigerant Piping Work 5.6.2 Connection between Outdoor Units, 36 - 55.99 38.1 19.05 Multi-Kits and Indoor Units 56 - 67.99 44.45 19.05 68 - 73.99 44.45 22.2 Piping Work Conditions 74 - 89.99 50.8 22.2 Allowable Item Mark Piping 90 - 97.99 50.8 25.4...

  • Page 49: Piping Branch Restrictions

    5. Refrigerant Piping Work • • The minimum outdoor temperature during The piping connection kit is counted from the cooling operation is 10°C. indoor unit side (as Piping Connection Kit 1). • • The connectable indoor unit capacity ratio Check the gas pipe and liquid pipe are ≤...

  • Page 50: Restrictions On Height Difference Between Indoor Units

    5. Refrigerant Piping Work 5.8 Restrictions on Height by one size with reducers (field-supplied). If (a) is smaller than (b) after increasing the size, Difference between Indoor increase the size of (a) to the same size as (b). Units 2. The difference between the piping length from the first branch to the farthest indoor unit and If all of the following conditions apply, increase the the piping length from the first branch to the...

  • Page 51: Electrical Wiring

    6. Electrical Wiring 6. Electrical Wiring will occur at the terminal connections. • Tightly clamp the wires with a cord clamp after the wiring to the terminal block has WARNING been completed. In addition, run securely the wires through the wiring hole. If not, •...

  • Page 52: Electrical Wiring For Outdoor Unit

    6. Electrical Wiring due to a rapid change in electricity (1) Detail of Electrical Box Terminal consumption of the device and activation < 380-415V/50Hz, 380V/60Hz > Terminal Block for of switch. Therefore, check the field Power Source (TB1) regulations and standards before performing electrical work in order to Screw (M8) protect the power supply wiring for the...

  • Page 53: Electrical Wiring Connection

    6. Electrical Wiring entering the conduit tube. (5) Details of Wiring Outlets inside the Electrical Box (Rubber Bush Section) • Make a drain hole at the lowest part of the Rubber Bush (Wiring Outlet) conduit tube. Correct Incorrect CAUTION • Tightly secure the power source wiring using a cord clamp inside the unit.
  • Page 54 6. Electrical Wiring 1. Power Source Wiring Supply the power sources to each outdoor unit and indoor unit group respectively. Power source wiring is fundamentally according to this method. ELB (Earth Leakage Breaker) Comm. Wiring (O.U. ~ I.U.) 2 FUSE Comm.
  • Page 55 6. Electrical Wiring 3. The recommended wiring, ELB and breaker sizes are shown in Table 6.1. • Standard Type Table 6.1 Electrical Data and Recommended Wiring, Breaker Size/1 Outdoor Unit 1 ELB Main Switch Maximum Power Running 2 Fuse Supply Line Model Power Supply Nominal...

  • Page 56: Electrical Wiring Connection Of Indoor Unit And Outdoor Unit

    1.25 mm (manufactured by Hitachi Cable Co. Ltd.)) or 2-core twist pair cable (equivalent to following cables: KPEV or KPEV-S (manufactured by HITACHI Cable Co. Ltd.)) for the control cable between the outdoor unit and the indoor unit. The total communication wiring length between the indoor unit and the outdoor unit should be less than 1000 m and the total communication wiring length between outdoor units should be less than 30m.
  • Page 57 6. Electrical Wiring 6. Use the same kind of cables in the same H-LINK system. 7. The communication wiring is required to be separated from the power supply wiring when installed parallel to the power supply wiring. Keep at least 5cm between the communication wiring and the power supply wiring, and also min. 1.5m between the communication wiring and power supply wiring for other electrical device.

  • Page 58: Psw And Dip Switch Setting For Outdoor Unit

    6. Electrical Wiring < 380-415V/50Hz, 380V/60Hz > Outdoor Unit A (Main) Outdoor Unit B (Sub) 1 2 3 4 1 2 3 4 Earth Earth : Terminal Block Main Switch : Printed Circuit Board : Field Wiring FUSE : Communication Wire (Shielded Twist Pair Cable) DC5V (Non-Pole Communication H-LINK System)
  • Page 59 6. Electrical Wiring Step3. Press the push switch (PSW1) while in installation setting mode. Step3-1 The 7-segment LED will display the following and the number will change by pressing PSW3 or PSW5. Step3-2 The change between refrigerant cycle number and outdoor unit number can be made by pressing PSW2 and PSW4.
  • Page 60 6. Electrical Wiring ○ In the case of one refrigerant cycle in the same H-LINK or H-LINK II, set all No. 1 pins of DSW10 in the “OFF” position except the main outdoor unit A. SET FREE Series Set the end terminal. Outdoor Unit (Unit Combination) DSW10...
  • Page 61 6. Electrical Wiring • Function Setting External Input/Output and Function Setting Make sure to perform external input/output and function setting while the outdoor unit is stopped. It cannot be set while the outdoor unit is operating or check mode. [ External Input/Output Setting ] [ Function Setting ] Start of Setting Start of Setting...

  • Page 62: Air-Tight Test And Additional Refrigerant Charge

    7. Air-Tight Test and Additional Refrigerant Charge 7. Air-Tight Test and Additional Refrigerant Charge 7.1 Air-Tight Test 1. Check to ensure that spindles of the stop valves for gas and liquid pipes are closed completely before air-tight test. Check the cap shape and tighten according to the torque specification as shown in the table below. 2.

  • Page 63: Vacuuming

    7. Air-Tight Test and Additional Refrigerant Charge < Basic Method > WARNING If the penetration of moisture is suspected, perform “Triple Evacuation Method” that is • Be sure to use Nitrogen Gas for air-tight test. described in the next paragraph. If other gases such as oxygen gas, acetylene Step1.

  • Page 64: Additional Refrigerant Charge Calculation

    7. Air-Tight Test and Additional Refrigerant Charge 7.3 Additional Refrigerant Charge Calculation Table 7.1 Additional Refrigerant Charge Calculation Additional Refrigerant Charge Calculation Although refrigerant has been charged into this unit in advance, additional refrigerant charge is required according to piping length. Determine the additional refrigerant quantity according to the following procedure, and charge the system with it.

  • Page 65: Charging Work

    7. Air-Tight Test and Additional Refrigerant Charge NOTE: NOTE: • • When the refrigerant is recovered or charged The gas staying at O-ring or screw part may because of repairing, operating or adjusting the make sound when removing the cap of the unit, record the refrigerant quantity again.
  • Page 66 7. Air-Tight Test and Additional Refrigerant Charge cause compressor failure. The additional countermeasures even if the gas leakage is occurred. refrigerant must be charged in a liquid < Calculation of Refrigerant Concentration > condition. 1. Calculate the total quantity of refrigerant R (kg) e.

  • Page 67: Test Run

    8. Test Run 8.1 Before Test Run concentration. *1. It is opening without door or opening at the top or 1. Check to ensure that the refrigerant piping bottom of door with floor space more than 0.15%. and communication between outdoor unit NOTES: and indoor units are connected to the same refrigerant cycle.

  • Page 68: Test Run

    8. Test Run • As for other remote controllers, refer to data shown in Table 6.1, and ensure that the Installation and Maintenance Manual components comply with national and local attached to each wired controller. codes. • Use shielded wires (≥0.75mm ) for field wiring 5.
  • Page 69 8. Test Run units”, and the triple combination (one If the system will not perform a test run, check the (1) set with three (3) indoor units) is indoor and outdoor temperatures and humidity. indicated as “3 units”. (The system cannot run in cooling mode at an outdoor temperature of 10°C DB or less.) Test Run Setting: 2 units Step4.
  • Page 70 8. Test Run WARNING • Do NOT operate the air conditioner to check the electrical wiring, etc. until the preparation of the test run is completed. Table 8.1 Test Run and Maintenance Record MODEL: SERIAL No. COMPRESSOR MFG. No. CUSTOMER'S NAME AND ADDRESS: DATE: 1.  Is the rotation direction of the indoor fan correct? 2.
  • Page 71 8. Test Run Table 8.2 Alarm Code Code Category Content of Abnormality Leading Cause Activation of Float Switch (High Water Level Indoor Unit Activation of Protection Device (Float Switch) in Drain Pan, Abnormality of Drain Pipe, Float Switch, or Drain Pan) Activation of Protection Device Activation of PSH (Pipe Clogging, Excessive Outdoor Unit...
  • Page 72 8. Test Run Code Category Content of Abnormality Leading Cause Abnormality of High Pressure Sensor Abnormality of Outdoor Air Thermistor Abnormality of Discharge Gas Thermistor on Sensor on Incorrect Wiring, Disconnecting Wiring, Top of Compressor Outdoor Unit Breaking Wire, Short Circuit Abnormality of Heat Exchanger Liquid Pipe Thermistor Abnormality of Low Pressure Sensor...
  • Page 73 8. Test Run Code Category Content of Abnormality Leading Cause Incorrect Setting of Unit Model Code Incorrect Setting of Indoor Unit Model Incorrect Setting of Unit and Refrigerant Cycle 64 or More Number is Set for Address or Number Refrigerant Cycle Abnormality of EEPROM EEPROM failure, Incorrect Data of EEPROM Indoor Unit...

  • Page 74: Safety And Control Device Setting

    9. Safety and Control Device Setting 9. Safety and Control Device Setting Compressor Protection The compressor is protected by the following devices and their combinations. 1. High Pressure Switch: This switch cuts out the operation of the compressor when the discharge pressure exceeds the setting.
  • Page 75 Memo...
  • Page 76 © 2023 Hitachi-Johnson Controls Air Conditioning, Inc. A16381N3TL 2023.1 Printed in China...

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