Page 1 SERVICE MANUAL HEAT PUMP AIR CONDITIONERS - SET FREE mini-HNRQ1 SERIES VRF CONDITIONERS SYSTEM - Service Manual < Outdoor Units > Power Supply Model RAS-3.0HNBRKQ1 RAS-3.5HNBRKQ1 RAS-4.0HNBRKQ1 220-240V/1Ph/50Hz RAS-4.5HNBRKQ1 RAS-5.0HNBRKQ1 RAS-6.0HNBRKQ1 RAS-6.5HNBRKQ1 RAS-7.0HNBRMQ1 RAS-8.0HNBRMQ1 380-415V/3Ph/50Hz RAS-10HNBRMQ1 RAS-11HNBRMQ1 RAS-12HNBRMQ1 HS2019266A...
Page 2: Table Of Contents
Contents Installation .................................1 1. Before Installation ............................2 1.1 Necessary Tools and Instrument List for the Installation ................. 2 1.2 Structure ..............................4 1.3 Refrigerant Cycle Diagram ........................7 1.4 Model of Outdoor Unit ..........................8 1.5 Transportation ............................9 1.6 Factory Supplied Accessories .......................
Page 3 1. Outdoor Unit ..............................122 1.1 Removing Service Cover ........................122 1.2 Removing Air Outlet Grille ........................123 1.3 Removing Upper Cover ........................124 1.4 Removing Lower Service Cover and Rear Cover ................125 1.5 Removing Outdoor Fan Motor ......................126 1.6 Removing Electrical Box ........................
Page 4 IMPORTANT NOTICE ● The company pursues a policy of continuous improvement in design and performance of products. The right is therefore reserved to vary specifications without notice. ● The company cannot anticipate every possible circumstance that might involve a potential hazard. ●...
Page 5 <Signal Words> ● Signal words are used to identify levels of hazard seriousness. Definitions for identifying hazard levels are provided below with their respective signal words. DANGER : DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.
Page 6 WARNING ● Please do not use sprays such as pesticide, oil paint, hair spray or other flammable gases within 1 meter of the unit. ● If the circuit breaker acts or fuse acts frequently, please stop the system operation immediately and contact your local dealer or customer service.
Page 7 NOTICE ● Do not tread on the product or place sundries on the product. ● Do not place or put any material on the product or inside the product. ● Provide a strong and correct foundation so that: A. The outdoor unit is not on an incline. B.
Page 8: Installation
Installation...
Page 9: Before Installation
INSTALLATION 1. Before Installation 1.1 Necessary Tools and Instrument List for the Installation Tool Tool Handsaw Wrench Phillips Screwdriver, Slotted Screwdriver Scale Vacuum pump Charging Cylinder Refrigerant Gas Hose Gauge Manifold Megohmmeter Wire Cutters Copper Pipe Bender Gas Leak Detector Manual Water Pump (for Indoor Unit) Leveller Pliers...
Page 10 INSTALLATION ● : Interchangeability is available with current R22 : Only for Refrigerant R410A (No Interchangeability with R22) ■ ◎: Prohibited : Only for Refrigerant R407C (No Interchangeability with R22) ★ Interchangeability with Reason of Non-Interchangeability and Attention Measuring Instrument and Tool ( ○...
Page 11: Structure
INSTALLATION 1.2 Structure Model: RAS-3.0~3.5HNBRKQ1 Part Name Part Name Part Name Part name Chassis Filter Solenoid Valve Accumulator Vibration Absorder High Pressure Sensor Low Pressure Sensor Air Outlet Crankcase Heater High Pressure Switch 4-Way Valve Propeller Fan Compressor Oil Separator Check Joint Fan Motor Electronic Expansion...
Page 12 INSTALLATION Model: RAS-4.0~6.5HNBRKQ1 Part Name Part Name Part Name Part name Chassis Filter Electrical Box Air Outlet Vibration Absorder High Pressure Sensor Check Joint Propeller Fan Crankcase Heater High Pressure Switch Low Pressure Sensor Fan Motor Compressor Filter 4-Way Valve Air Inlet Liquid Stop Valve Check Valve...
Page 13 INSTALLATION Model: RAS-7.0~12HNBRMQ1 Part Name Part Name Part Name Part name Chassis Filter Solenoid Valve Accumulator Vibration Low Pressure High Pressure Sensor Air Outlet Absorder Sensor Crankcase Heater High Pressure Switch 4-Way Valve Propeller Fan Compressor Oil Separator Check Joint Fan Motor Electronic Expansion Liquid Stop Valve...
Page 14: Refrigerant Cycle Diagram
INSTALLATION 1.3 Refrigerant Cycle Diagram Model:RAS-3.0~6.5HNBRKQ1 Model:RAS-7.0~12HNBRMQ1 Part Name Part Name Part Name Compressor Fan Motor Oil Capillary Tube Oil Separator Distributor Filter 4 High Pressure Switch Filter 1 Solenoid Valve High Pressure Sensor Electronic Expansion Valve Low Pressure Sensor Check Valve Filter 2 Crankcase Heater...
Page 15: Model Of Outdoor Unit
INSTALLATION 1.4 Model of Outdoor Unit The number of indoor units that can be connected to an outdoor unit is defined in the following table : Table 1.1 System Combination Min. Total Capacity of Max. Total Capacity of Numbers of the indoor Min.
Page 16: Transportation
INSTALLATION 1.5 Transportation Transport the product as near to the installation location before unwrapping the package. CAUTION ● Do not put any material or stand on the product. ● Apply two lifting wires onto the outdoor unit, when lifting it by crane. (1) The Method of Hanging When hanging the unit, ensure a balance of the unit, ensure the safety and lift up smoothly.
Page 17: Factory Supplied Accessories
INSTALLATION (2) The weight of outdoor unit. Model Net Weight (kg) Gross Weight (kg) RAS-3.0HNBRKQ1 RAS-3.5HNBRKQ1 RAS-4.0HNBRKQ1 RAS-4.5HNBRKQ1 RAS-5.0HNBRKQ1 RAS-6.0HNBRKQ1 RAS-6.5HNBRKQ1 RAS-7.0HNBRMQ1 RAS-8.0HNBRMQ1 RAS-10HNBRMQ1 RAS-11HNBRMQ1 RAS-12HNBRMQ1 WARNING Do not place or leave any other objects (cables, tools) inside the outdoor unit or control board and verify that nothing remains there prior to installation and test run.
Page 18: Outdoor Unit Installation
INSTALLATION 2. Outdoor Unit Installation 2.1 Installation Location and Precautions ● When installing the unit into: ● A wall: Make sure the wall is strong enough to hold the weight of the unit. It may be necessary to construct a strong wood or metal frame to provide added support. ●...
Page 19 INSTALLATION ● Select a direction where a strong wind does not blow to the air outlet surface or the air inlet surface. ● If a suitable location cannot be found, the windbreak wall or fence should be installation to prevent a strong wind blows to air inlet or outlet of the outdoor unit.
Page 20: Service Space
INSTALLATION 2.2 Service Space When the outdoor unit is installed, the allowed service space is as follows: ● If there is not enough service space for air inlets and outlets, it may result in a performance drop-off and mechanical issues due to insufficient air intake. ●...
Page 21 INSTALLATION (2) Obstacles on the outlet side and no obstacle in the upper side. Unit: mm Single Installation Multiple Installation...
Page 22 INSTALLATION (3) Obstacles on right and left side of single installation. (a) There is no obstacle in the upper side. Unit: mm (b) There are obstacles in the upper side. Unit: mm (4) Multi-row and multiple installations. Unit: mm Note: If L is larger than H, mount the units on a base so that H is greater or equal to L.
Page 23: Installation Work
FIELD WORK INSTRUCTIONS 2.3 Installation Work (1) Secure the outdoor unit with the anchor bolts. In order to avoid the vibration from transmitting to the indoor by the base of the unit, the 5 ～ 10mm thickness of rubber gaskets (field supplied) should be placed under the feet of the outdoor unit, which could decrease the vibration into the room.
Page 24 INSTALLATION Model: RAS-7.0~12HNBRMQ1 Unit: mm (3) The drain holes are working during the heating and defrosting operation. Choose a place where well drainage is available or provide a groove for draining. (4) The unit will condensate in heating mode, and the condensate will freeze in colder climates, which may cause the road slippery, if not properly managed.
Page 25: Refrigerant Piping Work
INSTALLATION 3. Refrigerant Piping Work WARNING ● The design pressure for this product is 4.15MPa. The pressure required for refrigerant R410A is 1.4 times higher than that of the refrigerant R22. That means that the refrigerant piping for R410A must be thicker than that for R22.
Page 26 INSTALLATION (7) Cautions for Brazing Work Pressure Reducing Valve (Stop Valve) Brazing Part Nitrogen Gas Pressure ≤2.9 psi (0.02 MPA) Nitrogen Gas Valve Pipe Piping Connection on-site Note: Cover the gap with Do not cover the outlet. if the inner Nitrogen tape or a rubber plug pressure exceeds atmospheric pressure,...
Page 27 INSTALLATION (B) Joint Selection The minimum thickness of joint and flare nut dimension are selected from the table below: Minimum Thickness of Joint Flare Nut Dimension B Unit: mm Unit: mm Diameter(Φd) R410A Diameter(Φd) R410A 6.35 6.35 9.52 9.52 12.7 12.7 Flare Nut 15.88...
Page 28: Model Of Branch Pipe
INSTALLATION 3.2 Model of Branch Pipe (1) E-102SN The model of E-102SN branch pipe is used for the model of RAS-3.0~6.5HNBRKQ1 and RAS- 7.0~12HNBRMQ1 outdoor unit. Unit: mm Model E-102SN for RAS-3.0~6.5HNBRKQ1 and RAS-7.0~12HNBRMQ1 Gas Pipe Liquid Pipe (2) Precaution for branch pipe connection Use the branch pipe to connect the outdoor/indoor units.
Page 29: Refrigerant Piping Size
INSTALLATION 3.3 Refrigerant Piping Size Example of connection: connection of 4 indoor units. Table 3.1 Piping Size of Main Pipe Pipe between the outdoor unit and the 1st branch pipe; Stop Valve The pipes between the branch pipes (mm) Model Liquid Liquid Marks...
Page 30 INSTALLATION Table 3.2 Piping Work Conditions Allowable Piping Length Item Marks RAS-3.0~3.5HNBRKQ1 ≤65 meters RAS-4.0~5.0HNBRKQ1 ≤70 meters Between the outdoor unit and the a+b+c+d farthest indoor unit RAS-6.0~6.5HNBRKQ1 ≤85 meters RAS-7.0~12HNBRMQ1 ≤100 meters RAS-3.0~3.5HNBRKQ1 ≤100 meters Maximum Piping RAS-4.0~5.0HNBRKQ1 ≤120 meters a+b+c+d+L1+ Length Total liquid pipe length...
Page 31: Refrigerant Piping Work For Outdoor Unit
INSTALLATION 3.4 Refrigerant Piping Work for Outdoor Unit (1) The refrigerant piping can be installed in four directions (front, right, bottom or rear side) as shown in the following figures. Model: RAS-3.0~3.5HNBRKQ1 Model: RAS-4.0~6.5HNBRKQ1; RAS-7.0~12HNBRMQ1...
Page 32 INSTALLATION Attention for Removing Service Cover – Procedures of Removing Cover – ● Remove the screws according to the figure above. Note: Remove the screws and hold the service cover with your hands. If not, the service cover may fall down. ●...
Page 33: Air Tight Test
INSTALLATION NOTICE ● Protect cables and refrigerant pipes from the edges of the holes with insulations and so on. (Field supplied). ● Prevent the cables from contacting the refrigerant piping and the hot components of the unit directly. ● For the right side and rear side piping work, secure enough space for the piping. (4) Be sure to attach the piping cover to prevent rain water entering the unit.
Page 34: Vacuuming
INSTALLATION 3.6 Vacuuming (1) Connect the pressure gauge and the charging hoses to the check joints of the stop valves with a vacuum pump. (2) Vacuum the refrigerant piping of the system with the vacuum pump until the pressure reaches -0.1MPa or lower.
Page 35: Additional Refrigerant Charge Calculation
INSTALLATION 3.7 Additional Refrigerant Charge Calculation Although this unit has been charged with refrigerant, additional refrigerant charge is required on the site. Determine additional quantity of refrigerant required according to the following table, and charge it into the system. (1) Calculating the method of Additional Refrigerant Charge Total Additional Model Item...
Page 36: Additional Refrigerant Charge Work
INSTALLATION (4) Record of Additional Charge The total refrigerant charge of the system should be calculated by the following formula: Total of Refrigerant Charge Total Additional Charge: W Total Ref. Charge: Date of Ref. Charge Work: The system 3.8 Additional Refrigerant Charge Work (1) The additional refrigerant charge is required according to the calculation.
Page 37: Pressure Measurement
INSTALLATION 3.9 Pressure Measurement When the pressure is measured, it can be applied by the check joints as the following figures. Connect the pressure gauge according to the table below, because of high pressure side and low pressure side change by operation mode.
Page 38: General Check
INSTALLATION 4.1 General Check (1) Make sure that the field-supplied electrical components (main power switches, circuit breakers, wires, conduit connectors and wire terminals) have been properly selected according to the electrical characteristics indicated in the table 4.1. Make sure that the components comply with the local national standards and rules.
Page 39: Electrical Wiring Connection
INSTALLATION 4.2 Electrical Wiring Connection Connect the electrical wiring according to the following figures: Figure 4.1 Electrical Wiring Connection for RAS-3.0~6.5HNBRKQ1 Figure 4.2 Electrical Wiring Connection for RAS-7.0~12HNBRMQ1...
Page 40 INSTALLATION Table 4.1 Recommended Electrical Characteristics Maximum Power Supply Transmission Running Rated Rated Sensitive Model Power Supply Wiring cable Ampacity Ampacity Ampacity (Cores×mm (Cores×mm (mA) RAS-3.0~3.5 220-240V/1Ph/50Hz 3×4.0 2×0.75 HNBRKQ1 RAS-4.0~6.5 220-240V/1Ph/50Hz 3×6.0 2×0.75 HNBRKQ1 RAS-7.0~8.0 380-415V/3Ph/50Hz 5×6.0 2×0.75 HNBRMQ1 RAS-10~12 380-415V/3Ph/50Hz 5×6.0...
Page 41: Electrical Wiring For Outdoor Unit
INSTALLATION WARNING ● The ELB (Earth leakage breaker), FUSE and S (Main switch) must be installed to each power source of outdoor unit and indoor units. If not, it may cause of an electrical shock or fire. ● Perform the electrical work according to the regulations of each region and this installation and maintenance manual.
Page 42 OPERATION Figure 4.4 Electrical Wiring for RAS-7.0~12HNBRMQ1 Notes: (1) Perform all the electrical work in accordance with this manual and in compliance with the local regulations and safety standards. The electrical wiring should be applied by the qualified person. (2) The recommended electrical characteristics are calculated by the related safety standards. The environment temperature is less than 40°C, the length of the power supply wire is no more than 15 meters.
Page 43: Dip Switch Setting Of Outdoor Unit
OPERATION 5. DIP Switch Setting of Outdoor Unit There are several DIP Switches in the front of the outdoor unit, which are designed for the test and diagnostic convenience. They have the advantages that they can monitor the real-time status of the outdoor unit, display the alarm codes, view the historical alarm codes, and so on.
Page 44 OPERATION (4) Setting Refrigerant Cycle No. In the same refrigerant cycle, set the same refrigerant cycle No. for the outdoor unit and the indoor units as shown below. The range of refrigerant cycle No. is between 0 and 63. Refrigerant Cycle No. = The value of the DSW4 (System Address Setting: Double Digit) + The value of the RSW1 (System Address Setting: Single Digit).
Page 45: Test Run
OPERATION 6. Test Run Test run of outdoor units and indoor units should be performed one by one sequentially. 6.1 Before Test Run (1) Do not operate the system until all the points have been examined and cleared. ● Check to ensure that the refrigerant piping and transmission between outdoor unit and indoor units are connected to the same refrigerant cycle.
Page 46: Test Run By Wired Controller
OPERATION 6.3 Test Run by Wired Controller (1) Turn on the power supply of the outdoor and indoor units for more than 12 hours. (2) The Liquid Crystal Display (LCD) of the wired controller is shown as below: (3) Press and hold the MODE “ ”...
Page 47: Safety And Control Device Setting
OPERATION (7) During the test run, if any malfunction happens, please examine and clear it by referring to the table of alarm codes. (8) If the indicated number of the wired controller is different with the actual connected indoor units, the auto-address function is not performed correctly due to incorrect wiring.
Page 48: Drain Adapter: Dc-01Q (Optional Parts)
OPERATION 8. Drain Adapter: DC-01Q (Optional Parts) This Drain Adaptor is for the drain pipe connection in order to use the outdoor unit bottom base as a drain pan. Install it as instructed in this manual. (1) Applicable Unit Model of Outdoor Unit 3~6.5HP 7~12HP Required Quantity for Drain Adapter...
Page 49 OPERATION CAUTION ● The drain cap is used exclusively for the drain hole of the outdoor unit bottom base (φ24mm). Do not use it for the hole of the drain adaptor. ● Use a rubber cap when securing the drain adaptor and drain cap. (No rubber cap should allow water leakage.) After securing, ensure that there is no water leakage from the drain cap by pouring water into the bottom base and then draining it from the drain adaptor.
Page 50: Troubleshooting
Troubleshooting...
Page 51: Initial Troubleshooting
TROUBLESHOOTING 1. Initial Troubleshooting 1.1 Checking Electrical Wiring and Power Source (1) Check the following items for any abnormality in activation of the system. Check Situation Check Method Is any power source breaker or fuse Check the voltage (Load side) of the breaker and also check the continuity of the fuse blown? with a tester.
Page 52 TROUBLESHOOTING (3) Wired Controller Connecting Diagram (a) Wired Controllers to each Unit for Individual Operation Setting. (b) One Wired Controller for Individual Operation Setting. The maximum quantity of the indoor units can be controlled by one wired controller is 16. (c) Connecting Wired Controller if Connecting between Individual Systems.
Page 53: Location Of Printed Circuit Boards
TROUBLESHOOTING 1.2 Location of Printed Circuit Boards (1) Model: RAS-3.0~6.5HNBRKQ1 Symbol Purpose 1. Communicating between Indoor Unit and Outdoor Unit; 2. Processing Sensor Input; Outdoor Unit Board 3. Operation Control for Above Items 1 to 2. Compressor Operation Control, Fan2 Control, PCB1 (Driver Board) Electrical Expansion Valve, 4-Way Valve, Solenoid Valve, and Overcurrent Control;...
Page 54 TROUBLESHOOTING b. Service Board (PCB2) Definition of DIP Switch: DIP Switch Code Definition DIP Switch Code Definition DSW1 Test Run PSW1 Manual Defrosting DSW2 Function Setting PSW2 Decrease ▼ DSW3 Model Setting PSW3 Increase ▲ DSW4 System Address Setting: Double Digit RSW1 System Address Setting: Single Digit DSW6...
Page 55 TROUBLESHOOTING c. Reactor Board (PCB3) d. Fan Motor Driver Board (PCB4) Part name Function Information LED2 (Red) It indicates: “Alarm”. LED3 (Yellow) It indicates: “Alarm”. LED4 (Green) It indicates: “Alarm”. Power source indicator for inverter control of the PCB1 (3.3V) LED7 (Green) Normal Condition: Activated /ON;...
Page 56 TROUBLESHOOTING (2) Model: RAS-7.0~12HNBRMQ1 Symbol Purpose 1. Communicating between Indoor Unit and Outdoor Unit; 2. Processing Sensor Input; 3. Processing DIP Switch Input; 4. Operation Control for Above Items 1 to 3. Compressor Operation Control, Fan Control, Outdoor Unit Board PCB1 Expansion Valve, 4-Way Valve, Solenoid Valve, and Overcurrent Control;...
Page 57 TROUBLESHOOTING a. Outdoor Unit Board (PCB1) Function Information Part Name Power Source Indicator for Main Board (Low Voltage) LED1 (Red) Normal Condition: Activated /ON Abnormal Condition: Deactivated /OFF It indicates the communication state between the Main Board and Driven Board. LED2 (Green) Normal Condition: Flashing Abnormal Condition: Deactivated /OFF...
Page 58 TROUBLESHOOTING b. Driver Board (PCB2) Part Name Function Information Communication Indicator LED1(Green) Normal Condition: Flashing Abnormal Condition: ON /OFF Power Source Indicator for Driver Board LED7(Red) Normal Condition: Activated /ON Abnormal Condition: Deactivated /OFF Power Source Indicator for Control Part LED5(Green) Normal Condition: Activated /ON Abnormal Condition: Deactivated /OFF...
Page 59 TROUBLESHOOTING c. Fan Motor Driver Board (PCB3) Part Name Function Information Communication Indicator LED1(Green) Normal Condition: Activated /ON Abnormal Condition: Deactivated /OFF Power Source Indicator for Fan Motor Driver Board LED8(Red) Normal Condition: Activated /ON Abnormal Condition: Deactivated /OFF Power Source Indicator for Control Part LED5(Green) Normal Condition: Activated /ON Abnormal Condition: Deactivated /OFF...
Page 60 TROUBLESHOOTING d. Noise Filter Board (NF1)
Page 61: Checking Rotary Switch And Dip Switch Settings
TROUBLESHOOTING 1.3 Checking Rotary Switch and DIP Switch Settings (1) Outdoor Unit (Factory setting) The following diagram indicates the factory settings of DSWs on PCBs in the outdoor units. Turn OFF all power sources before performing settings. DIP switch settings cannot be changed without first disconnecting from the power source.
Page 62 TROUBLESHOOTING DSW3 Capacity and Power Supply Setting Capacity(HP) Power Supply 220-240V 1N~ 50HZ 10.0 380-415V 3N~ 50HZ DSW5 Ref.Cycle No Setting Communication Setting DSW4 Setting is required Setting is required Setting Before Shipment Setting Position For End Terminal Resistance Cancellation Set No.1 pin of DSW5 correctly in the same H-LINK system DSW4 RSW1...
Page 63 TROUBLESHOOTING (2) Setting of Refrigerant System No. Setting outdoor unit refrigerant system No. is required. In the same refrigerant system, set the same refrigerant system No. for the outdoor unit and the indoor units as shown below. As for setting indoor unit refrigerant system No., set RSW2 and DSW5 on the indoor unit PCB. Setting Switch Item 10 digit...
Page 64: Checking Wired Controller
TROUBLESHOOTING 1.4 Checking Wired Controller Each “Check Menu” item and its function is explained in the following figure: Normal Mode Interface Press and hold “ ” and “ ” simultaneously for five seconds during the normal mode Check Menu Press and hold “ ”...
Page 65 TROUBLESHOOTING Check Menu Item Function Operation Press and hold “ ” and “ ” simultaneously for Sensor condition of air conditioner Check 1 five seconds during the normal mode, and select will be monitored and indicated. “Check 01”. Press and hold “ ”...
Page 66 TROUBLESHOOTING (2) Features of Check Mode 2 Item Data Name Item Data Name Inlet Air Temperature for I.U. Discharge Pressure Outlet Air Temperature for I.U. Suction Pressure Liquid Pipe Temp. for I.U. Target Frequency Outdoor Air Temp. Operating Frequency Gas Pipe Temp. for I.U. I.U.
Page 67 TROUBLESHOOTING (4) To Reset Alarm History Display Press and hold “ ” and “ ” simultaneously for five seconds during the alarm code history display, and all the alarm history would be deleted. Then the No. of error, the No. of indoor unit and the error code will display “00”...
Page 68 TROUBLESHOOTING 1.5 Checking Using 7-Segment Display WARNING ● Only an authorized person can check using this method. (1) Before Checking ● Turn ON the main power supply. Wait for more than 20 seconds to start checking. ● Checking Items * Expansion Valve Opening * Temperature Readings from Thermistors * Number of Indoor Units Connecting in the Same System ●...
Page 69 TROUBLESHOOTING (2) Details of 7-Segment Display Indication Data Item Check Item Index Information Contents Indicates only for the segments Input/Output State of Outdoor Micro-Computer corresponding to the equipment Total Capacity of Operation Indoor Unit 0 ～ 199 Control Software No. in use is No.
Page 70 TROUBLESHOOTING Fan 1 Motor Current 0~9.9(A) Fan 2 Motor Current 0~9.9(A) 0~63 Indoor Unit Address (Indoor Unit No.) Indoor Electronic Expansion Valve Opening 0 ～ 100(%) -19 ～ 127(°C) Liquid Pipe Temp. of Indoor Unit -19 ～ 127(°C) Gas Pipe Temp. of Indoor Unit -19 ～...
Page 71 TROUBLESHOOTING (3) Alarm Code Alarm Category Content of Abnormality Leading Cause Code Activation of Protection Activation of Float Switch (High Water Level in Drain Pan, Problem Indoor Unit Device (Float Switch) of Drain Piping, Float Switch, or Drain Pan) Activation of Protection Activation of PSH (Pipe Clogging, Excessive Refrigerant, Outdoor Unit Device (High Pressure Cut)
Page 72 TROUBLESHOOTING Abnormality of Discharge Gas Thermistor Abnormality of High Pressure Sensor Abnormality of Outdoor Air Thermistor Incorrect Wiring, Disconnected Wiring, Broken Wire Short Circuit Abnormality of Heat Exchanger Piping Thermistor Abnormality of Low Pressure Sensor Sensor on Incorrect Capacity Setting of Outdoor Incorrect Capacity Code Setting of Combination Excessive or Outdoor Unit Unit and Indoor Unit...
Page 73 TROUBLESHOOTING Abnormality of EEPROM Outdoor unit, indoor machine different Tier, brand exception Incorrect Outdoor Unit Combination combination Incorrect Indoor Unit Connection No. There are 19 or More Non-Corresponding to H-LINK II Units are Setting Connected to One System. Indoor Unit Indoor Fan Controller Communication No.
Page 74 TROUBLESHOOTING (4) Cause Code of Indoor Unit Stoppage ( Code Code Item Item (SEG1) (SEG1) Instantaneous Overcurrent of Inverter; Operation OFF, Power OFF Electronic Thermal Activation of Inverter Retry; Abnormal Current Sensor of Inverter Retry. Retry due to Inverter Voltage Decrease; Thermo-OFF Retry due to Inverter Overvoltage Electronic Valve Opening Difference...
Page 75 TROUBLESHOOTING (5) Cause Code of Comp. Inverter Stoppage ( Corresponding of Remark Code Cause Cause Code of I.D. (SEG1) Indication during Retry Alarm Code Stoppage IPM Error Instantaneous Overcurrent Inverter Fin Thermistor Protection Activation Electronic Thermal Protection Inverter Voltage Decrease Overvoltage Abnormal Communication Abnormal Current Detection...
Page 76 TROUBLESHOOTING Abnormal MCU RAM Abnormal MCU Register Abnormal MCU Timer Abnormal MCU Flash Abnormal Reference Voltage Abnormal Software Protection Module (6) Cause Code of Fan Controller Stoppage ( Remark Corresponding of Code Cause Cause Code of I.D. Alarm (SEG1) Indication during Retry Stoppage Code IPM Error...
Page 77 TROUBLESHOOTING (7) Indoor Unit Capacity Table Code Capacity Name Code Capacity Name (8) Abnormal Data Record "Abnormal Data Record" (n1 ~ n9) in checking item can record recent abnormal stoppages. (The maximum number of recordable is n9, n1 is the latest one.) In case of abnormal stoppage in following table, accumulated operation time when abnormality happened, alarm code/cause code of I.D.
Page 78 TROUBLESHOOTING Cause Code of Alarm Code or Inverter/Fan Stoppage Cause Code of I.D. Contents Stoppage Activation of protection device (High Pressure Cut) Abnormality communication between inverter PCB and outdoor unit PCB Abnormality of power supply phase Activation of inverter voltage increase/decrease protection d1-18 Activation of discharge gas superheat decrease protection d1-16...
Page 79: Checking Of Protection Control Information
TROUBLESHOOTING 1.6 Checking of Protection Control Information Protection control code is displayed on 7-segment display when a protection control is activated. It is turned OFF when the protection control is canceled. If several protection controls are activated, the code of the protection control with highest priority will be displayed.
Page 80: Troubleshooting Procedures
TROUBLESHOOTING Protection Control Code and Retry Control Code Indication Protection Control Remark (SEG1) To control the compressor frequency for prevention of operation with high/low Pressure Ratio Protection Control pressure ratio. High Pressure Increase Protection To control the compressor frequency for prevention of high pressure Control increase.
Page 81: Troubleshooting Using Alarm Codes
TROUBLESHOOTING 2.2 Troubleshooting Using Alarm Codes Alarm Activation of Protection Device (Float Switch) in Indoor Unit Code ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★...
Page 82 TROUBLESHOOTING Alarm Activation of Protection Device (High Pressure Switch) in Outdoor Unit Code ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. Action Event Cause...
Page 83 TROUBLESHOOTING Alarm Abnormal Communication between Indoor Unit and Outdoor Unit Code ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★ When fuses are blown, or the circuit breakers are activated, check the cause of overcurrent and take necessary action.
Page 84 TROUBLESHOOTING Alarm Abnormal Communication between Inverter PCB and Outdoor Unit PCB Code ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★...
Page 85 TROUBLESHOOTING Alarm Abnormal Inverter Voltage Code (Insufficient Inverter Voltage or Overvoltage) ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★ If either insufficient voltage or overvoltage is detected between the terminal R-S on the inverter PCB (Driver Board) three times in 30 minutes, the operation stops and this alarm code is displayed.
Page 86 TROUBLESHOOTING Alarm Decrease in Discharge Gas Superheat Code ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★ If the discharge temperature of the compressor is below the estimated condensing temperature for 30 minutes during operation, the compressor stops and then the operation is automatically retried after three minutes.If this occurs again twice in the next 120 minutes, this alarm code is displayed.
Page 87 TROUBLESHOOTING Alarm Excessively High Discharge Gas Temperature Code ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★ This alarm code is displayed when the discharge temperature is too high during cooling/heating operation.
Page 88 TROUBLESHOOTING Alarm Abnormality of Thermistor for Indoor Unit Inlet Air Temperature (Inlet Air Thermistor) Code ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★...
Page 89 TROUBLESHOOTING Alarm Abnormality of Thermistor for Indoor Unit Outlet Air Temperature Code (Outlet Air Thermistor) ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★...
Page 90 TROUBLESHOOTING Alarm Abnormality of Thermistor for Liquid Refrigerant Pipe Temperature at Indoor Unit Heat Code Exchanger (Freeze Protection Thermistor) ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★...
Page 91 TROUBLESHOOTING Alarm Abnormality of Thermistor for Gas Refrigerant Pipe Temperature at Indoor Unit Heat Code Exchanger (Gas Pipe Thermistor) ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★...
Page 92 TROUBLESHOOTING Alarm Abnormality of Thermistor for Outside Air Temperature (for Econo Fresh) Code ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★...
Page 93 TROUBLESHOOTING Alarm Abnormality of Discharge Gas Thermistor Code ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★ This alarm code is displayed when a short circuit (0.9kΩ or less) or disconnection (5946kΩ or more) of the thermistor is detected during a heating or cooling operation.
Page 94 TROUBLESHOOTING Alarm Abnormality of High Pressure Sensor Code ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★ This alarm code is displayed when output voltage of the high pressure sensor decreases to 0.1V or less, or increases to 4.9V or more during operation.
Page 95 TROUBLESHOOTING Alarm Abnormality of Outdoor Air Thermistor (Outdoor Unit Ambient Thermistor) Code ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★...
Page 96 TROUBLESHOOTING Alarm Abnormality of Thermistor for Evaporating Temperature Code during Heating Operation (Outdoor Unit Evaporating Thermistor) ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★...
Page 97 TROUBLESHOOTING Alarm Abnormality of Low Pressure Sensor Code ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★ This alarm code is displayed when output voltage of the low pressure sensor decreases to 0.1V or less, or increases to 4.9V or more during operation.
Page 98 TROUBLESHOOTING Alarm Incorrect Capacity Setting of Outdoor Unit and Indoor Unit Code ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★...
Page 99 TROUBLESHOOTING Alarm Incorrect Setting of Indoor Unit Number Code ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★ This alarm code is displayed in 3 to 5 minutes after power-on of outdoor unit, when the indoor unit No. set by DSW6 and RSW1 on I.U.
Page 100 TROUBLESHOOTING Alarm Problem with Picking up Circuit for Protection in Outdoor Unit Code ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★...
Page 101 TROUBLESHOOTING Alarm Activation of Pressure Ratio Decrease Protection Code ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★ If the pressure ratio ε*1) is less than 1.5 for a minute, the compressor stops. The operation automatically restarts after three minutes.
Page 102 TROUBLESHOOTING Alarm Activation of Low Pressure Increase Protection Code ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★ If the suction pressure (Ps) of the compressor is more than 1.4 MPa for a minute, the compressor stops. The operation automatically restarts after three minutes.
Page 103 TROUBLESHOOTING Alarm Activation of High Pressure Increase Protection Code ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★ If the high pressure (Pd) of the compressor is more than 3.8 MPa for a minute, the compressor stops. The operation automatically restarts after three minutes.
Page 104 TROUBLESHOOTING Alarm Activation of Low Pressure Decrease Protection Code ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★ If the low pressure (Ps) of the compressor is less than 0.09 MPa for 12 minutes, the compressor stops. The operation automatically restarts after three minutes.
Page 105 TROUBLESHOOTING Alarm Activation of Inverter Overcurrent Protection Code ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★ If instantaneous overcurrent or electronic thermal protection occurs on inverter as follows, the compressor stops.The operation automatically restarts after three minutes.
Page 106 TROUBLESHOOTING Restart Operation Check if compressor wirings are Driver board is damaged, connected reversely? Is electric reactor replace the driver board. wiring secure? Replace compressor, if faulty. Fasten the wiring. Is electric reactor wiring loose? Is the power supply voltage within the range of the rated voltage? Check the power supply voltage, Is the power supply voltage higher than...
Page 107 TROUBLESHOOTING Alarm Abnormality of Current Sensor for Inverter Code ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★ If abnormal current detection occurs, the compressor stops. The operation automatically restarts after three minutes.
Page 108 TROUBLESHOOTING Alarm Inverter Error Signal Detection Code ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★ If IPM (transistor module) error, ground fault detection or step-out detection occurs, the compressor stops. The operation automatically restarts after three minutes.
Page 109 TROUBLESHOOTING Alarm Abnormality of Inverter Fin Temperature Code ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★ When the following condition occurs three times in 30 minutes, the operation stops and this alarm code is displayed.
Page 110 TROUBLESHOOTING Alarm Inverter Failure Code ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★ When the following condition occurs three times in 30 minutes, the operation stops and this alarm code is displayed.
Page 111 TROUBLESHOOTING Alarm Abnormality of Fan Motor Code ● The alarm code is flashed on the 7-segment display of the outdoor unit. ● The alarm code is displayed on the wired controller of the indoor unit. ★ If the revolution of the fan motor is less than 10rpm in 10 seconds after the fan motor starts operation, the fan motor stops.
Page 112: Procedures For Checking
TROUBLESHOOTING 3. Procedures for Checking 3.1 Checking Method for Outdoor Unit PCB of 3~6.5HP (1) Checking Power Circuit of Outdoor Unit PCB Check the power circuit on O.U.PCB in following procedures. Refer to the figure on next page about the positions of LEDs, fuses, and check points.
Page 113 TROUBLESHOOTING (2) Control Part of Outdoor Unit PCB The position of LEDs, connectors on O.U.PCB are as follow Item Part Name LED1, LED2, LED*** Connector PCN***, CN*** Fuse FU1, FU2 Check Point 5V, 12V, GND LED1 12VD ● Checking Item for Fuse The purpose, capacity, and causes of fuse melted are shown as below.
Page 114 TROUBLESHOOTING (3) Inverter Part of Outdoor Unit PCB ● Detail of Check Points LED5 CN42 PCN30 AC-L1 PCN8 L-COM AC-N AC-L CAUTION ● Check whether the high voltage still exists in the inverter PCB after power is disconnected. When the unit is operated, LED5 is turned ON.
Page 115 TROUBLESHOOTING ● Checking Method for Inverter Module Rectifier and Inverter Circuit of Inverter Module. Remove all the terminals of the inverter module before check If all the items (below table) are performed and all items are satisfied, the inverter module is non-defective. Test Point Digital Tester Result Analog Tester Result...
Page 116: Checking Method For Pcba Of 7~12Hp
TROUBLESHOOTING 3.2 Checking Method for PCBA of 7~12HP (1) Checking Method of Outdoor Unit PCB Check the power circuit on O.U.PCB in following procedures. Refer to the figure on next page about the positions of LEDs, fuses, and check points. Refer check points by a circuit tester and judgment value as well. CAUTION ●...
Page 117 TROUBLESHOOTING ● Detail of Check Points The position of LEDs, connectors on O.U.PCB are as follow Item Part Name LED1, LED2, LED3, LED4, LED6 Connector PCN***, CN*** Fuse EFR1, EFS1 Check Point P1, GND, VCC05, VCC13, VDC-1 VDC1 LED6 VCC13 LED2 EFR1 LED3...
Page 118 TROUBLESHOOTING (2) Checking Method for Inverter PCB (Driver Board) ● Detail of Check Points CAUTION ● Check whether the high voltage still exists in the inverter PCB after power is disconnected. When the unit is operated, LED7 is turned ON. At the time of powering off the unit, LED7 is turned OFF. In this case, the residual voltage is less than DC50V.
Page 119 TROUBLESHOOTING ● IPM Circuit of Driver Board (In case of using Digital Tester) Test Point Analog Tester Result Digital Tester Result (+)DCL2, (-)R More than 100k Ohm Over Load (OL) (-)DCL2, (+)R More than 1k Ohm 0.5V or smaller (-)CN28(N), (+)R More than 100k Ohm Over Load (OL) (+)CN28(N), (-)R...
Page 120 TROUBLESHOOTING (3) Checking Method for Fan Motor Driver Board ● Detail of Check Points CAUTION ● Check whether the high voltage still exists in the fan motor driver board after power is disconnected. When the unit is operated, LED7 is turned ON. At the time of powering off the unit, LED7 is turned OFF. In this case, the residual voltage is less than DC50V.
Page 121 TROUBLESHOOTING Test Point Analog Tester Result Digital Tester Result (+)CN28(P), (-)CN801(U1) More than 100k Ohm Over Load (OL) (-)CN28(P), (+)CN801(U1) More than 1k Ohm 0.5V or smaller (-)CN28(N), (+)CN801(U1) More than 100k Ohm Over Load (OL) (+)CN28(N), (-)CN801(U1) More than 1k Ohm 0.5V or smaller (+)CN28(P), (-)CN801(V1) More than 100k Ohm...
Page 122: Checking Method Of Electronic Expansion Valve
TROUBLESHOOTING 3.3 Checking Method of Electronic Expansion Valve For Indoor Unit For Outdoor Unit Check for the liquid pipe temperature during the heating operation. It is abnormal if the liquid pipe pressure does not Locked with Fully Closed increase during the cooling operation. It is abnormal if the temperature does not increase.
Page 123: Maintenance
Maintenance...
Page 124: Outdoor Unit
MAINTENANCE 1. Outdoor Unit WARNING ● TURN OFF all power supply switches. NOTICE ● Removal of main parts should be performed according to the following procedures. ● To attach new parts after replacement, reverse the removal procedure. ● To prevent contamination of the refrigerant by water or foreign materials, do not expose the refrigerant parts open to atmosphere for long periods.
Page 125: Removing Air Outlet Grille
MAINTENANCE 1.2 Removing Air Outlet Grille Remove the securing screws for each air outlet grille (molded plastic). Tool Gloves, Phillips Screwdriver Model:3~3.5HP Model:4~6.5HP Model:7~12HP...
Page 126: Removing Upper Cover
MAINTENANCE 1.3 Removing Upper Cover After removing the securing screws for the upper cover, lift the upper cover up. Tool Gloves, Phillips Screwdriver Model: 3~3.5HP Model: 4~6.5HP Model: 7~12HP...
Page 127: Removing Lower Service Cover And Rear Cover
MAINTENANCE 1.4 Removing Lower Service Cover and Rear Cover (1) Remove the service cover. (2) Remove the securing screws for the side cover and remove the side cover pulling it downward. (3) Remove the securing screws for rear cover and remove the rear cover by pulling it downward. Tool Gloves, Phillips Screwdriver Model: 3~3.5HP...
Page 128: Removing Outdoor Fan Motor
MAINTENANCE 1.5 Removing Outdoor Fan Motor (1) Remove the air outlet grille. (2) Remove the upper cover. (3) Remove the closing nut and the washer securing the propeller fan to the motor shaft with a socket wrench. Then remove the propeller fan from the motor shaft. (If it is difficult to remove, a corrosion or puller may be needed.) (4) Removing Fan Motor.
Page 129 MAINTENANCE Connector Securing Screw for Fan Motor Model Motor Securing Positions of Motor Clamp and Wires Upper Fan Lower Fan Upper Fan Lower Fan Q’ty Motor Motor Motor Motor Motor Clamp Lead Wire For O.U. PCB M5 x 20 Fan Motor 3~3.5HP PCN30 (Screw with...
Page 130: Removing Electrical Box
MAINTENANCE 1.6 Removing Electrical Box (1) Remove the service cover. (2) Remove the upper cover. (3) Remove the securing screws for electrical box. Tool Phillips Screwdriver Model: 3~3.5HP Note: Remove the electrical box after disconnecting wires. (1) Remove the 4-Way valve coil, the expansion valve coil, and the solenoid valve coil. (2) Disconnect the fasten terminals from high pressure switch and pressure sensor.
Page 131 MAINTENANCE ● Remove the electrical box from the front of outdoor unit. Model: 4~6.5HP Note: Remove the electrical box after disconnecting wires. (1) Remove the 4-Way valve coil, the expansion valve coil and the solenoid valve coil. (2) Disconnect the fasten terminals from high pressure switch and pressure sensor. (3) Disconnect the fan motor connectors and thermistors from the outdoor unit PCB.
Page 132 MAINTENANCE ● Remove the electrical box from the top of outdoor unit. ● Remove the electrical box from the front of outdoor unit. Remove the securing screws for Front Plate Remove the securing screws for electrical box...
Page 133 MAINTENANCE Model: 7~12HP Note: Remove the electrical box after disconnecting wires. (1) Remove the 4-Way valve coil, the expansion valve coil, and the solenoid valve coil. (2) Disconnect the fasten terminals from high pressure switch and pressure sensor. (3) Disconnect the fan motor connectors and thermistors from the outdoor unit PCB. (4) Disconnect the compressor wires and loosen all cord clamps.
Page 134: Removing Compressor
MAINTENANCE 1.7 Removing Compressor (1) Remove the service cover, the side cover, and the rear cover. In case that the outdoor unit is located near the wall, remove refrigerant piping and move the outdoor unit away from the wall. (2) Recover the refrigerant from check joints. (3) Remove the valve stay.
Page 135 MAINTENANCE Model: 7~12HP Compressor Position Vibration Absorber 1 Vibration Absorber 2 Attached Not Attached Notes: ● The compressor and piping are connected by brazing. Before brazing work, ensure that there is no flammable material nearby, as remaining oil inside the piping may ignite. ●...
Page 136: Removing High Pressure Switch And Pressure Sensor
MAINTENANCE 1.8 Removing High Pressure Switch and Pressure Sensor (1) Remove the service cover. (2) Recover the refrigerant from check joints. (3) Disconnect the fasten terminals of the high pressure switch and pressure sensor. (4) Carefully unsolder the high pressure switch and the pressure sensors. Phillips Screwdriver, Charging Hose, Tool Torch...
Page 137: Removing 4-Way Valve Coil
MAINTENANCE 1.9 Removing 4-Way Valve Coil (1) Remove the service cover. (2) Disconnect the connector on the outdoor unit PCB in the electrical box. (3) Remove the 4-Way valve coil by removing one securing screw for 4-Way valve. Note: For model of 3~3.5HP, remove the front plate of the electrical box before removing the 4-Way valve coil. (4) To replace the 4-Way valve coil, reverse the removal procedure.
Page 138: Removing Electronic Expansion Valve Coil
MAINTENANCE 1.10 Removing Electronic Expansion Valve Coil (1) Remove the service cover, the side cover, and the rear cover. (2) Disconnect the connector on the outdoor unit PCB. (3) Pull the expansion valve coil upward until it slides off from valve body. (4) To attach the new expansion valve coil, reverse the removal procedure.
Page 139: Removing Solenoid Valve Coil (Sva)
MAINTENANCE 1.11 Removing Solenoid Valve Coil (SVA) (1) Remove the service cover. (2) Disconnect the connector on the outdoor unit PCB. (3) Remove one securing screw for solenoid valve coil (SVA) and slide the solenoid valve coil (SVA) upward. (4) To install a new solenoid valve coil, reverse the removal procedure. Tool Phillips Screwdriver Model: 3~3.5HP...
Page 140: Removing 4-Way Valve
MAINTENANCE 1.12 Removing 4-Way Valve (1) Remove the service cover, the upper cover, the side cover, and the rear cover. (2) Recover the refrigerant from check joints. (3) Remove the 4-Way valve coil. (4) Remove the 4-Way valve assemblies from the secured positions (four brazed parts). (a) Remove the 4-Way valve and the gas stop valve while cooling the valve bodies with a wet cloth.
Page 141: Removing Electronic Expansion Valve And Solenoid Valve
MAINTENANCE 1.13 Removing Electronic Expansion Valve and Solenoid Valve (1) Remove the service cover, Remove the front piping cover, and the rear cover. (2) Recover the refrigerant from check joints. (3) Remove the coils. (4) Remove the brazed parts as shown in the figures. Electronic Expansion Valve (EVO) Brazed Parts: 2 Solenoid Valve (SVA) Brazed Parts: 2 (a) Remove the electronic expansion valve and the solenoid valve after cooling the valve bodies with a...
Page 142: Main Parts
MAINTENANCE 2. Main Parts 2.1 Inverter (1) 3~6.5HP ● Specification Applicable Model 3HP~4.5HP 5HP~6.5HP Applicable Power Source 220-240V/1Ph/50Hz Output Voltage (Maximum) 220V Inverter PCB Output Current (Maximum) Fan Controller 1.2A Control Method Vector PWM Control Inverter 10Hz~120Hz ±1Hz Range Output Frequency 90rpm~850rpm ±10rpm Output Characteristics...
Page 143 MAINTENANCE ● Protective Function (i). Excessive High or Low Voltage for Inverter (a) Level of Detection When the voltage of direct current is greater than 450V, an abnormality is detected. When the voltage of direct current is smaller than 190V, an abnormality is detected. (b) Function When an abnormality is detected, the inverter compressor is stopped and the cause code of inverter stoppage is communicated to outdoor unit PCB.
Page 144 MAINTENANCE (a) Level of Detection When the output current exceeds the rated current continuously for 10 seconds, an abnormality is detected. (b) Function When output current exceeds the rated current, and the frequency decreases. An overload signal is issued when output current exceeds the rated current continuously for 10 seconds. When the output current decreases lower than 98% of the rated current, the frequency decrescence is canceled.
Page 145 MAINTENANCE (c) Cancellation of Protection Function When the wired controller is off or main power supply is cut off. (iv) Fin Temperature Increase (a) Level of Detection When the temperature of internal thermistor exceeds more than 100°C, an abnormality is detected. (b) Function When an abnormality is detected, the inverter compressor is stopped and the cause code of inverter stoppage is communicated to main control.
Page 146: Rotary Compressor
MAINTENANCE 2.2 Rotary Compressor The rotary compressor is adopted in the model of 3~6.5HP. It has the following advantages: (1) Low vibration and low noise design (i) The twin rotor crankshaft is arranged in a symmetrical type, which counteracts the centrifugal force produced by the rotation, and the vibration is smaller.
Page 147: Scroll Compressor
MAINTENANCE 2.3 Scroll Compressor A sort of scroll compressor is adopted in the model of 7~12HP. It has the following advantages: (1) Reliable Mechanism for Low Vibration and Low Sound (i) The rotating direction is definite. (ii) The pressure inside of the chamber is high pressure, and the surface temperature of the chamber is 60°C to 110°C.
Page 148: Thermistor
MAINTENANCE 2.4 Thermistor (1) Position of Thermistor Model: 3~3.5HP Model: 4~6.5HP (4-5HP) (6-6.5HP) Model: 7~12HP Thermistor for Outdoor Ambient Temperature Thermistor for Discharge Gas Tem- Thermistor for perature Evaporating Temperature...
Page 149: Electronic Expansion Valve For Outdoor Units
MAINTENANCE (2) Thermistor for Discharge Gas Temperature of Compressor (for Prevention of Discharge Gas Overheating) (a) A thermistor for discharge gas temperature of the compressor is installed to prevent discharge gas from overheating. If discharge gas temperature increases excessively, lubricating oil deterioration occurs and lubricating properties deteriorate, resulting in short compressor life.
Page 150: Pressure Sensor
MAINTENANCE 2.6 Pressure Sensor (1) Position of Pressure Sensor Model: 3HP~3.5HP Model: 4HP~6.5HP Model: 7HP~12HP (2) High Pressure Sensor The high pressure during operation is detected by a high pressure sensor, and compressor frequencies are controlled by the proportional controlling method with operating capacity of indoor units (or PID Control for Compressor Frequency) so that the high pressure is controlled in an appropriate range.
Page 151: High Pressure Switch
MAINTENANCE 2.7 High Pressure Switch When the high pressure reaches 601 psi (4.15MPa), compressor is stopped to protect the refrigerant cycle components. Model: 3HP~3.5HP Model: 4HP~6.5HP Brazing Part High Pressure Switch Model: 7HP~12HP Brazing Part High Pressure Switch 2.8 Noise Filter (NF1) The noise filter decreases the leakage of noise made by the outdoor unit to the power supply.
Page 152: Reader (Dcl)
MAINTENANCE 2.9 Reader (DCL) This part is used for changing the alternative current to the direct current for the inverter. Model: 3HP~6.5HP Reactor <400V/50Hz, 380-415V/50Hz, 380V/60Hz> Items Specifications Character 0.41mH (40KHz) (DC 16A) Rated Current Direct Current Resistance 50.0mΩ (Max) (25°C) Model: 7HP~12HP Items Specifications...
Page 153: External Input/Output And Function Setting
External Input/Output and Function Setting...
Page 154: External Input/Output Setting Method
EXTERNAL INPUT/OUTPUT AND FUNCTION SETTING 1. External Input/Output Setting Method The setting should be performed during the outdoor unit stoppage. This setting is not available during the operation, the check mode, and the function setting. Start DSW1-No.4 is “ON”. DSW2-No.6 is “ON”. NOTES: 1.
Page 155 EXTERNAL INPUT/OUTPUT AND FUNCTION SETTING ● Specifications of Relay ● Specifications of Relay Specifications Remarks Specifications Mini-Power Relay MY1F (or 2F) Mini-Power Relay LY1F DC12V 220V made by OMRON Co. made by OMRON Co. Arrangement of Push Switches on PCB1 For example: 7~12HP PSW1 PSW2 PSW3 SEG1 DSW1...
Page 156: Exteral Input And Output Settings
EXTERNAL INPUT/OUTPUT AND FUNCTION SETTING 2. Exteral Input and Output Settings On the outdoor unit Printed Circuit Board (PCB1), there are three input terminals (CN1, CN2 as shown below) to receive external signals and two output terminals (CN7 as shown below) to send signals out. Control functions shown in these tables are available when setting input and output terminals.
Page 157: External Input Function Setting
EXTERNAL INPUT/OUTPUT AND FUNCTION SETTING 2.2 External Input Function Setting The following signals can be received by the outdoor unit PCB. (1) Input Fixing Heating Operation Mode (Control Function No.1), Input Fixing Cooling Operation Mode (Control Function No.2) When the input terminals for the setting operation mode on the outdoor unit PCB are short-circuited, the operation mode can be set at the cooling or heating mode.
Page 158 EXTERNAL INPUT/OUTPUT AND FUNCTION SETTING (3) Input Outdoor Fan Motor Start/Stop (Control Function No.4) This is an auxiliary function to protect the outdoor unit from snow. When the input terminals for Outdoor Fan Motor Start/Stop on the outdoor unit PCB are short-circuited during the compressor stoppage. If outdoor ambient temperature is 10 °C or less, all the outdoor fan motors start operating.
Page 159 EXTERNAL INPUT/OUTPUT AND FUNCTION SETTING (4) Input Forced Stoppage (Control Function No.5) When the input terminals for Forced Stoppage on the outdoor unit PCB are short-circuited while running, the compressors and the indoor fan motors are stopped. The stoppage code No. “10” is given. In this case, if the input terminals are opened, operation is resumed.
Page 160 EXTERNAL INPUT/OUTPUT AND FUNCTION SETTING Notes: ● The Demand Current Control (%) is value criterion. The value used for this control is calculated from the current, and therefore it is different from the value indicated by a wattmeter. If it is required that the maximum power consumption is managed precisely, a field-supplied demand controller should be used.
Page 161: External Output Function Setting
EXTERNAL INPUT/OUTPUT AND FUNCTION SETTING 2.3 External Output Function Setting The following signals can be picked from the outdoor unit PCB. (1) Output Operation Signal (Control Function No.1) This function is utilized to receive the operation signal. Auxiliary relay contacting (RYa) is closed during the operation. The operation signal will be sent to output terminals when the indoor units are operating.
Page 162 EXTERNAL INPUT/OUTPUT AND FUNCTION SETTING (3) Output Compressor ON Signal (Control Function No.3) This function is utilized to receive the compressor operation signal. Auxiliary relay contacting (RYa) is closed during the compressor operation. (4) Output Defrosting Signal (Control Function No.4) This function is utilized to receive the defrosting signal.
Page 163: Function Setting
EXTERNAL INPUT/OUTPUT AND FUNCTION SETTING 3. Function Setting The function setting should be performed during the outdoor unit stoppage. This setting is not available during External Input/Output Setting. Start DSW1-No.4 is “ON”. DSW2-No.5 is “ON”. NOTES: 1. Record the function No. of each setting The menu indication is changed when setting the optional function.
Page 164 EXTERNAL INPUT/OUTPUT AND FUNCTION SETTING Contents 7-Segment Display Setting Item No setting IU Electronic Expansion Valve Opening during Expansion valve opening: pattern1 Heating Operation Expansion valve opening: pattern2 Stoppage No setting IU Electronic Expansion Valve Opening during Expansion valve opening: pattern1 Heating Thermo-OFF Expansion valve opening: pattern2 No setting...
Page 165 EXTERNAL INPUT/OUTPUT AND FUNCTION SETTING Contents 7-Segment Display Setting Item No Setting (valid) Invalid Electronic Expansion Valve Opening Difference Protection Invalid electronic expansion valve opening deference protection (Prepared 4) Prepared 5 Interaction defrosting (For store) Prepared 6 Voltage balance control for power supply Prepared 7 ESP for outdoor unit No setting (Preheating during outdoor unit stoppage)
Page 166: Service And Maintenance Record By 7-Segment Display
EXTERNAL INPUT/OUTPUT AND FUNCTION SETTING 4. Service and Maintenance Record by 7-Segment Display Customer’s Name DATE Outdoor Unit Model (Serial No. (Serial No. (Serial No. (1)Operation Mode (2)Test Run Start Time (3)Data Collect Start Time (4)Read Out Data from 7-Segment in Outdoor Unit Protection Control Code Y20A...
Page 167: Field Work Instructions
Field Work Instructions...
Page 168: Caution For Refrigerant Leakage
FIELD WORK INSTRUCTIONS 1. Caution for Refrigerant Leakage Make sure that the entire VRF system meets the local codes, regarding Safety. 2. Modifications of Charging Refrigerants The company’ air conditioners are designed and manufactured based on using specified refrigerants. The applicable refrigerants are specified for each unit’s models.
Page 169 FIELD WORK INSTRUCTIONS ● Line Condition - Pay attention to working voltage, amperage and phase balance. Inspect for faulty contact caused by loosened terminal connections, oxidized contacts, foreign matter, and other items. Inspect for electrical insulation resistance. (f) Control and Protective Devices ●...
Page 170: Service And Maintenance Record
FIELD WORK INSTRUCTIONS 4. Service and Maintenance Record Serial No. Compressor MFG No. Model: Date: User name and address: 1. Is the rotation direction of the indoor unit fan correct? 2. Is the rotation direction of the outdoor unit fans correct? 3.
Page 171: Saturation Curve For Refrigerant
FIELD WORK INSTRUCTIONS 5. Saturation Curve for Refrigerant R410A Saturation Temperature (Liquid)
Page 172: Service Parts List
Service Parts List...
Page 173 SERVICE PARTS LIST SERVICE PARTS LIST Voltage 3φ 380~415V 50Hz Replacement Part Q'ty Per Unit Part Name Remarks Part No. Draw. No. (Order No.) U001A PRESSURE SWITCH H7C00447B QU001004 U012A PRESSURE SENSOR H17B46257B QU012009 PD,CN100,0-5.0Mpa/DC0.5-4.5V U012A PRESSURE SENSOR H17B46257C QU012017 PD,CN100,0-5.0Mpa/DC0.5-4.5V U012B PRESSURE SENSOR...
Page 174 REVERSING VALVE COIL H7D09826A QU304003 U305C EXPANSION VALVE COIL 17C78180A QU021019 U311 COMPRESSOR H7B04846A QU311018 ATL232SDNC9AUY U311 COMPRESSOR H7B02183B QU311019 ATH356SDPC9FQ-HITACHI U311 COMPRESSOR H7B04848A QU311022 ATH420SDPC9EQ U318 STOP VALVE H7C00434B QU027009 U320 STOP VALVE H7C00436A QU027010 U405 MAIN PCBA H7C05653C...
Page 175 SERVICE PARTS LIST RAS-3.0HNBRKQ1 RAS-3.5HNBRKQ1...
Page 176 SERVICE PARTS LIST RAS-3.0HNBRKQ1 RAS-3.5HNBRKQ1...
Page 177 SERVICE PARTS LIST RAS-4.0HNBRKQ1 RAS-4.5HNBRKQ1 RAS-5.0HNBRKQ1...
Page 178 SERVICE PARTS LIST RAS-4.0HNBRKQ1 RAS-4.5HNBRKQ1 RAS-5.0HNBRKQ1...
Page 179 SERVICE PARTS LIST RAS-6.0HNBRKQ1 RAS-6.5HNBRKQ1...
Page 180 SERVICE PARTS LIST RAS-6.0HNBRKQ1 RAS-6.5HNBRKQ1...
Page 181 SERVICE PARTS LIST Voltage 3φ 380~415V 50Hz Replacement Part Q'ty Per Unit Part Name Remarks Part No. Draw. No. (Order No.) U001A PRESSURE SWITCH H7C00447B QU001004 U012A HIGH PRESSURE SENSOR H17B46257B QU012009 PD,CN100,0-5.0Mpa/DC0.5-4.5V U012B LOW PRESSURE SENSOR 17B47112B QU012010 U013A TERMINAL BOARD H7C00614A QU013012...
Page 182 SERVICE PARTS LIST Voltage 3φ 380~415V 50Hz Replacement Part Q'ty Per Unit Part Name Remarks Part No. Draw. No. (Order No.) U304 REVERSING VALVE COIL H7D09826A QU304003 U305C EXPANSION VALVE COIL 17C78180A QU021019 U311 COMPRESSOR H7C06209A QU311027 AA50PHDG-D1S2 U311 COMPRESSOR H7C06208A QU311028 DC65PHDG-D1S2...
Page 183 SERVICE PARTS LIST RAS-7.0HNBRMQ1 RAS-8.0HNBRMQ1...
Page 184 SERVICE PARTS LIST RAS-7.0HNBRMQ1 RAS-8.0HNBRMQ1...
Page 185 SERVICE PARTS LIST RAS-10HNBRMQ1 RAS-11HNBRMQ1 RAS-12HNBRMQ1...
Page 186 SERVICE PARTS LIST RAS-10HNBRMQ1 RAS-11HNBRMQ1 RAS-12HNBRMQ1...
Page 187 HS2019266A...

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Hitachi mini-HNRQ1 Series Service Manual

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