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Daikin RZQG71~140L7V1B Service Manual

Skyair gqi-eco series heat pump r-410a 50hz
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Service Manual

GQI-Eco Series
Heat Pump R-410A 50Hz
Smart
Classic
RZQG71~140L7V1B
RZQG71~140L7Y1B
RZQSG71~140L7V1B
RZQSG71~140L7Y1B
ESIE12-06

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Summary of Contents for Daikin RZQG71~140L7V1B

  • Page 1: Service Manual

    ESIE12-06 Service Manual GQI-Eco Series Heat Pump R-410A 50Hz Smart RZQG71~140L7V1B RZQG71~140L7Y1B Classic RZQSG71~140L7V1B RZQSG71~140L7Y1B...

  • Page 3: Table Of Contents

    ESIE12-06 GQI-Eco Series Heat Pump R-410A 50Hz 1. Introduction .................... iv 1.1 Safety Cautions ..................iv 1.2 Used Icons .................... viii 1.3 Preface ....................ix Part 1 General Information............1 1. Model Names of Indoor / Outdoor Units..........2 2. Outlook Outdoor Units................3 Part 2 Functions ................5 1.
  • Page 4 ESIE12-06 3.1 Indoor Unit....................98 3.2 Outdoor Unit ..................102 Part 6 Field Setting ..............121 1. Test Operation ..................122 1.1 Pre-run Checks ..................122 1.2 Remote Controller Confirmation............122 1.3 Test Run....................123 1.4 Precautions Regarding Test Run ............123 1.5 Failure Diagnosis at the Moment of First Installation ......124 2.
  • Page 5 ESIE12-06 4.6 Indoor Unit Fan Motor Abnormality ............187 4.7 Capacity Setting Abnormality ...............188 4.8 Transmission Error (between Indoor Unit PCB and Adaptor PCB) ..189 4.9 Thermistor Abnormality ................191 4.10 Humidity Sensor System Abnormality ..........192 4.11 Remote Controller Thermistor Abnormality ..........193 4.12 Outdoor Unit PCB Abnormality.............194 4.13 High Pressure Abnormality (Detected by the High Pressure Switch)....................195...

  • Page 6: Introduction

    ESIE12-06 Introduction 1. Introduction Safety Cautions Cautions and  Be sure to read the following safety cautions before conducting repair work. Warnings  The caution items are classified into “ Warning” and “ Caution”. The “ Warning” items are especially important since they can lead to death or serious injury if they are not followed closely.
  • Page 7 Introduction ESIE12-06 Warning Be sure to wear a safety helmet, gloves, and a safety belt when working at a high place (more than 2 m). Insufficient safety measures may cause a fall accident. In case of R-410A refrigerant models, be sure to use pipes, flare nuts and tools for the exclusive use of the R-410A refrigerant.
  • Page 8 ESIE12-06 Introduction 1.1.2 Cautions Regarding Safety of Users Warning Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to conduct repair work. Never attempt to modify the equipment. The use of inappropriate parts or tools may cause an electrical shock, excessive heat generation or fire.
  • Page 9 Introduction ESIE12-06 Warning Check to make sure that the power cable plug is not dirty or loose, then insert the plug into a power outlet securely. If the plug has dust or loose connection, it may cause an electrical shock or fire. Be sure to install the product correctly by using the provided standard For unitary type installation frame.

  • Page 10: Used Icons

    ESIE12-06 Introduction Caution Be sure to measure the insulation resistance after the repair, and make sure that the resistance is 1 M or higher. Faulty insulation may cause an electrical shock. Be sure to check the drainage of the indoor unit after the repair. Faulty drainage may cause the water to enter the room and wet the furniture and floor.

  • Page 11: Preface

    Preface Thank you for your continued patronage of Daikin products. This is the new service manual for Daikin's Year 2012 RZQG-L & RZQSG-L series Heat Pump System. Daikin offers a wide range of models to respond to building and office air conditioning needs.

  • Page 12: Part 1 General Information

    ESIE12-06 Part 1 General Information 1. Model Names of Indoor / Outdoor Units..........2 2. Outlook Outdoor Units................3 General Information...

  • Page 13: Model Names Of Indoor / Outdoor Units

    Model Names of Indoor / Outdoor Units ESIE12-06 1. Model Names of Indoor / Outdoor Units For EDP applications Multi Combination Possibilities: • P = Pair • 2 = Twin • 3 = Triple • 4 = Double Twin Note: 1.

  • Page 14: Outlook Outdoor Units

    ESIE12-06 Outlook Outdoor Units 2. Outlook Outdoor Units General Information...
  • Page 15 Outlook Outdoor Units ESIE12-06 General Information...
  • Page 16 ESIE12-06 Part 2 Functions 1. Functions....................5 1.1 Indoor Unit....................5 1.2 Outdoor Unit .....................5 Functions...

  • Page 17: Part 2 Functions

    Functions ESIE12-06 1. Functions Indoor Unit FCQG-E FHQG-C Items Features Heat Pump Heat Pump Control Auto swing   Swing pattern selection   Switchable fan speed   Program “Dry”   High ceiling application  (*1) Two selectable Wired type ...

  • Page 18: Part 3 Specifications

    ESIE12-06 Part 3 Specifications 1. Specifications ..................8 2. Operation range ..................75 Specifications...

  • Page 19: Specifications

    Specifications ESIE12-06 1. Specifications RZQG71V FVQ71CVEB / RZQG71L7V1B Specifications...
  • Page 20 ESIE12-06 Specifications FUQ71BWV1B / RZQG71L7V1B FUQ71BVV1B / RZQG71L7V1B Specifications...
  • Page 21 Specifications ESIE12-06 FHQG71CVEB / RZQG71L7V1B FCQHG71FVEB / RZQG71L7V1B Specifications...
  • Page 22 ESIE12-06 Specifications FCQG71FVEB / RZQG71L7V1B FBQ71C8VEB / RZQG71L7V1B Specifications...
  • Page 23 Specifications ESIE12-06 FAQ71CVEB / RZQG71L7V1B Specifications...
  • Page 24 ESIE12-06 Specifications RZQG71L7V1B Specifications...
  • Page 25 Specifications ESIE12-06 RZQG71Y FVQ71CVEB / RZQG71L7Y1B Specifications...
  • Page 26 ESIE12-06 Specifications FUQ71BWV1B / RZQG71L7Y1B FHQG71CVEB / RZQG71L7Y1B Specifications...
  • Page 27 Specifications ESIE12-06 FCQHG71FVEB / RZQG71L7Y1B FCQG71FVEB / RZQG71L7Y1B Specifications...
  • Page 28 ESIE12-06 Specifications FBQ71C8VEB / RZQG71L7Y1B FAQ71CVEB / RZQG71L7Y1B Specifications...
  • Page 29 Specifications ESIE12-06 RZQG71L7Y1B Specifications...
  • Page 30 ESIE12-06 Specifications RZQG100V FVQ100CVEB / RZQG100L7V1B FUQ100BWV1B / RZQG100L7V1B Specifications...
  • Page 31 Specifications ESIE12-06 FUQ100BVV1B / RZQG100L7V1B FHQG100CVEB / RZQG100L7V1B Specifications...
  • Page 32 ESIE12-06 Specifications FCQHG100FVEB / RZQG100L7V1B FCQG100FVEB / RZQG100L7V1B Specifications...
  • Page 33 Specifications ESIE12-06 FBQ100C8VEB / RZQG100L7V1B FAQ100CVEB / RZQG100L7V1B Specifications...
  • Page 34 ESIE12-06 Specifications RZQG100L7V1B Specifications...
  • Page 35 Specifications ESIE12-06 RZQG100Y FVQ100CVEB / RZQG100L7Y1B FUQ100BWV1B / RZQG100L7Y1B Specifications...
  • Page 36 ESIE12-06 Specifications FHQG100CVEB / RZQG100L7Y1B FCQHG100FVEB / RZQG100L7Y1B Specifications...
  • Page 37 Specifications ESIE12-06 FCQG100FVEB / RZQG100L7Y1B FBQ100C8VEB / RZQG100L7Y1B Specifications...
  • Page 38 ESIE12-06 Specifications FAQ100CVEB / RZQG100L7Y1B Specifications...
  • Page 39 Specifications ESIE12-06 RZQG100L7Y1B Specifications...
  • Page 40 ESIE12-06 Specifications RZQG125V FVQ125CVEB / RZQG125L7V1B FUQ125BWV1B / RZQG125L7V1B Specifications...
  • Page 41 Specifications ESIE12-06 FUQ125BVV1B / RZQG125L7V1B FHQG125CVEB / RZQG125L7V1B Specifications...
  • Page 42 ESIE12-06 Specifications FDQ125C7VEB / RZQG125L7V1B FCQHG125FVEB / RZQG125L7V1B Specifications...
  • Page 43 Specifications ESIE12-06 FCQG125FVEB / RZQG125L7V1B FBQ125C8VEB / RZQG125L7V1B Specifications...
  • Page 44 ESIE12-06 Specifications RZQG125L7V1B Specifications...
  • Page 45 Specifications ESIE12-06 RZQG125Y FVQ125CVEB / RZQG125L7Y1B FUQ125BWV1B / RZQG125L7Y1B Specifications...
  • Page 46 ESIE12-06 Specifications FHQG125CVEB / RZQG125L7Y1B FDQ125C7VEB / RZQG125L7Y1B Specifications...
  • Page 47 Specifications ESIE12-06 FCQHG125FVEB / RZQG125L7Y1B FCQG125FVEB / RZQG125L7Y1B Specifications...
  • Page 48 ESIE12-06 Specifications FBQ125C8VEB / RZQG125L7Y1B Specifications...
  • Page 49 Specifications ESIE12-06 RZQG125L7Y1B Specifications...
  • Page 50 ESIE12-06 Specifications RZQG140V FVQ140CVEB / RZQG140L7V1B FHQG140CVEB / RZQG140L7V1B Specifications...
  • Page 51 Specifications ESIE12-06 FCQHG140FVEB / RZQG140L7V1B FCQG140FVEB / RZQG140L7V1B Specifications...
  • Page 52 ESIE12-06 Specifications FBQ140C8VEB / RZQG140L7V1B Specifications...
  • Page 53 Specifications ESIE12-06 RZQG140L7V1B Specifications...
  • Page 54 ESIE12-06 Specifications RZQG140Y FVQ140CVEB / RZQG140L7Y1B FHQG140CVEB / RZQG140L7Y1B Specifications...
  • Page 55 Specifications ESIE12-06 FCQHG140FVEB / RZQG140L7Y1B FCQG140FVEB / RZQG140L7Y1B Specifications...
  • Page 56 ESIE12-06 Specifications FBQ140C8VEB / RZQG140L7Y1B Specifications...
  • Page 57 Specifications ESIE12-06 RZQG140L7Y1B Specifications...
  • Page 58 ESIE12-06 Specifications RZQSG71V FVQ71CVEB / RZQSG71L2V1B FHQG71CVEB / RZQSG71L2V1B Specifications...
  • Page 59 Specifications ESIE12-06 FCQHG71FVEB / RZQSG71L2V1B FCQG71FVEB / RZQSG71L2V1B Specifications...
  • Page 60 ESIE12-06 Specifications FBQ71C8VEB / RZQSG71L2V1B FAQ71CVEB / RZQSG71L2V1B Specifications...
  • Page 61 Specifications ESIE12-06 RZQSG71L2V1B Specifications...
  • Page 62 ESIE12-06 Specifications RZQSG71V FVQ100CVEB / RZQSG100L7V1B FHQG100CVEB / RZQSG100L7V1B Specifications...
  • Page 63 Specifications ESIE12-06 FCQHG100FVEB / RZQSG100L7V1B FCQG100FVEB / RZQSG100L7V1B Specifications...
  • Page 64 ESIE12-06 Specifications FBQ100C8VEB / RZQSG100L7V1B FAQ100CVEB / RZQSG100L7V1B Specifications...
  • Page 65 Specifications ESIE12-06 RZQSG100L7V1B Specifications...
  • Page 66 ESIE12-06 Specifications RZQSG100Y FVQ100CVEB / RZQSG100L7Y1B FHQG100CVEB / RZQSG100L7Y1B Specifications...
  • Page 67 Specifications ESIE12-06 FCQHG100FVEB / RZQSG100L7Y1B FCQG100FVEB / RZQSG100L7Y1B Specifications...
  • Page 68 ESIE12-06 Specifications FBQ100C8VEB / RZQSG100L7Y1B FAQ100CVEB / RZQSG100L7Y1B Specifications...
  • Page 69 Specifications ESIE12-06 RZQSG100L7Y1B Specifications...
  • Page 70 ESIE12-06 Specifications RZQSG125V FVQ125CVEB / RZQSG125L7V1B FHQG125CVEB / RZQSG125L7V1B Specifications...
  • Page 71 Specifications ESIE12-06 FDQ125C7VEB / RZQSG125L7V1B FCQHG125FVEB / RZQSG125L7V1B Specifications...
  • Page 72 ESIE12-06 Specifications FCQG125FVEB / RZQSG125L7V1B FBQ125C8VEB / RZQSG125L7V1B Specifications...
  • Page 73 Specifications ESIE12-06 RZQSG125L7V1B Specifications...
  • Page 74 ESIE12-06 Specifications RZQSG125Y FVQ125CVEB / RZQSG125L7Y1B FHQG125CVEB / RZQSG125L7Y1B Specifications...
  • Page 75 Specifications ESIE12-06 FDQ125C7VEB / RZQSG125L7Y1B FCQHG125FVEB / RZQSG125L7Y1B Specifications...
  • Page 76 ESIE12-06 Specifications FCQG125FVEB / RZQSG125L7Y1B FBQ125C8VEB / RZQSG125L7Y1B Specifications...
  • Page 77 Specifications ESIE12-06 RZQSG125L7Y1B Specifications...
  • Page 78 ESIE12-06 Specifications RZQSG140V FVQ140CVEB / RZQSG140L7V1B FHQG140CVEB / RZQSG140L7V1B Specifications...
  • Page 79 Specifications ESIE12-06 FCQHG140FVEB / RZQSG140L7V1B FCQG140FVEB / RZQSG140L7V1B Specifications...
  • Page 80 ESIE12-06 Specifications FBQ140C8VEB / RZQSG140L7V1B Specifications...
  • Page 81 Specifications ESIE12-06 RZQSG140L7V1B Specifications...
  • Page 82 ESIE12-06 Specifications RZQSG140Y FVQ140CVEB / RZQSG140L7Y1B FHQG140CVEB / RZQSG140L7Y1B Specifications...
  • Page 83 Specifications ESIE12-06 FCQHG140FVEB / RZQSG140L7Y1B FCQG140FVEB / RZQSG140L7Y1B Specifications...
  • Page 84 ESIE12-06 Specifications FBQ140C8VEB / RZQSG140L7Y1B Specifications...
  • Page 85 Specifications ESIE12-06 RZQSG140L7Y1B Specifications...

  • Page 86: Operation Range

    ESIE12-06 Operation range 2. Operation range Smart Specifications...
  • Page 87 Operation range ESIE12-06 Specifications...
  • Page 88 ESIE12-06 Operation range Classic Specifications...
  • Page 89 Operation range ESIE12-06 Specifications...

  • Page 90: Part 4 Remote Controller

    ESIE12-06 Part 4 Remote Controller 1. Wired Remote Controller...............80 1.1 Applicable Models ..................80 1.2 Names and Functions ................80 1.3 MAIN/SUB Setting when Using 2 Remote Controllers ......84 1.4 Centralized Control Group No. Setting...........85 2. Wireless Remote Controller ..............87 2.1 Applicable Models ..................87 2.2 Names and Functions ................18 2.3 MAIN/SUB Setting..................89 3.

  • Page 91: Wired Remote Controller

    Wired Remote Controller ESIE12-06 1. Wired Remote Controller Applicable Models Model Series FCQG-E FHQG-C FCQG-F FCQHG-F FFQ-B9V FBQ-C8 FHQ-B8 FHQG-C FUQ-B8 FAQ-C FUQ-C BRC1D528 Remote Controller BRC1E51/52A7 Names and Functions 1.2.1 BRC1D528 23 7 1. ON/OFF BUTTON Press the ON/OFF button to start or stop the system. 2.
  • Page 92 ESIE12-06 Wired Remote Controller 10. DAY OF THE WEEK INDICATOR The day of the week indicator shows the current week day (or the set day when reading or programming the schedule timer). 11. CLOCK DISPLAY The clock display indicates the current time (or the action time when reading or programming the schedule timer).
  • Page 93 Wired Remote Controller ESIE12-06 35. FAN SPEED BUTTON This button toggles between L (Low), H (High), HH (very High), (Automatic). 36. AIRFLOW DIRECTION ADJUST BUTTON This button enables to adjust the airflow direction. 37. AIR FILTER CLEANING TIME ICON RESET BUTTON This button is used to reset the air filter cleaning time icon.
  • Page 94 ESIE12-06 Wired Remote Controller 6. Right button (Be sure to press the part with the symbol  Used to highlight the next items on the right-hand side.  Each screen is scrolled in the right-hand direction.  Home leave settings are enabled with this button kept pressed for at least four seconds. 7.

  • Page 95: Main/Sub Setting When Using 2 Remote Controllers

    Wired Remote Controller ESIE12-06 MAIN/SUB Setting when Using 2 Remote Controllers Situation The MAIN/SUB setting is necessary when 1 indoor unit is controlled by 2 remote controllers. When you use 2 remote controllers (control panel and separate remote controller), set one to MAIN and the other to SUB.

  • Page 96: Centralized Control Group No. Setting

    ESIE12-06 Wired Remote Controller Centralized Control Group No. Setting 1.4.1 BRC1D528 In order to conduct the central remote control using the central remote controller and the unified ON/OFF controller, Group No. settings should be made by group using the operating remote controller.
  • Page 97 Wired Remote Controller ESIE12-06 1.4.2 BRC1E51/52A7 In order to conduct the centralized remote control using the centralized remote controller and the unified ON/OFF controller, Group No. settings should be made by group using the operating remote controller. Make Group No. settings for centralized remote control using the operating remote controller. (1) <Basic screen>...

  • Page 98: Wireless Remote Controller

    ESIE12-06 Wireless Remote Controller 2. Wireless Remote Controller Applicable Models FCQHG-F Model Series FHQG-C FCQG-F Remote Controller — BRC7G63 Names and Functions ON OFF (10) DOWN ON OFF TEMP TIME (11) DOWN (13) RESERVE CANCEL (12) TIMER TEST (15) MODE (14) SWING (16)
  • Page 99 Wireless Remote Controller ESIE12-06 TIMER MODE START/STOP BUTTON DISPLAY “ ” (SIGNAL TRANSMISSION) Refer to page 10. This lights up when a signal is being TIMER RESERVE/CANCEL BUTTON transmitted. Refer to page 11. DISPLAY “ ” “ ” “ ” “ ”...

  • Page 100: Main/Sub Setting

    ESIE12-06 Wireless Remote Controller MAIN/SUB Setting Introduction To set the wireless remote controller, you have to set the address for:  The receiver of the wireless remote controller  The wireless remote controller. Setting the Address for the Receiver When using both a wired and a wireless remote controller for 1 indoor unit, the wired controller should be set to MAIN.

  • Page 101: Service Mode

    Service Mode ESIE12-06 3. Service Mode BRC1D528 3.1.1 Display Service Data Unit No. Mode No. Second Unit NO. Field Code No. Setting SETTING Mode First Code No. 1, 2, 7 TEST 1. Enter the field setting mode. Press the inspection / test operation button for 4 seconds or more. 2.
  • Page 102 ESIE12-06 Service Mode 3.1.2 Service Setting Mode No. Unit No. Mode No. Field Setting Mode Second Unit NO. Field Code No. Setting SETTING Mode First Code No. 1, 2, 6 Second Code No. TEST First Code No. 1,2,6 1. Enter the field setting mode. Press the inspection / test operation button for 4 seconds or more.

  • Page 103: Inspection Mode

    Inspection Mode ESIE12-06 4. Inspection Mode BRC1D528 Normal display (No display) Press the Inspection/test button once. Unit Error code Inspection (1) Inspection mode (1) Inspection mode Press the Inspection/test button once. Unit Error code Inspection Error code blinks when an error occurs. 0 7 1 F J J (2) Indoor unit model code...

  • Page 104: Part 5 Function And Control

    ESIE12-06 Part 5 Function and Control 1. Function of Main Components and Thermistors ........94 2. Operation Flow Chart ................96 2.1 Cooling / Dry Operation................96 2.2 Heating Operation ..................97 3. Function Details ..................98 3.1 Indoor Unit....................98 3.2 Outdoor Unit ..................102 Function and Control...

  • Page 105: Function Of Main Components And Thermistors

    Function of Main Components and Thermistors ESIE12-06 1. Function of Main Components and Thermistors RZQG71L (B) Electronic expansion valve Filter Filter Outdoor heat exchanger (C) Four way valve R2T R3T Check valve Indoor heat exchanger Pressure switch (high) S1PH Service port (5/16"...
  • Page 106 ESIE12-06 Function of Main Components and Thermistors  Outdoor Unit (A) Compressor (M1C) Inverter drive unit varies compressor operating frequency to control capacity and other factors. (B) Electronic Expansion Valve (Y1E) Provides control to maintain optimum operating condition for high efficiency. (C) Four Way Valve (Y1S) Changes operation of cooling / heating.

  • Page 107: Operation Flow Chart

    Operation Flow Chart ESIE12-06 2. Operation Flow Chart Cooling / Dry Operation Power supply ON Initialize electronic expansion valve Initialize micro-computer Preheating operation control Remote controller operation judgement Cooling/Dry Emergency Operation mode judgement Emergency Heating operation Heating Cooling/Dry Thermostat ON judgement Starting control four way valve changeover Normal control...

  • Page 108: Heating Operation

    ESIE12-06 Operation Flow Chart Heating Operation Power supply ON Initialize electronic expansion valve Initialize micro-computer Preheating operation control Remote controller ON operation judgement Cooling/Dry Emergency Operation mode judgement Emergency Heating operation Heating Cooling/Dry Thermostat ON judgement Starting control four way valve changeover Hot start control Normal control ·...

  • Page 109: Function Details

    Function Details ESIE12-06 3. Function Details Indoor Unit 3.1.1 Set Temperature and Control Temperature The relationship between "Set temperature by remote controller" and "Control target temperature" is as shown below. 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35˚C Set temperature by remote controller Control target temperature...
  • Page 110 ESIE12-06 Function Details  In dry operation ΔT < -2.5ºC Tro > 24ºC Dry operation Thermostat OFF Δ > -1ºC 24ºC ≥ Tro > 16ºC ΔT < -2ºC Dry operation Thermostat OFF Δ > -1ºC 16ºC ≥ Tro Tr < 13ºC Dry operation Thermostat OFF Tr >...

  • Page 111: Dew Condensation Prevention Control

    Function Details ESIE12-06  Heating When the following condition consists by mounting the adaptor for wiring PCB, the drain pump is turned on. Drain pump 5 min. 5 sec. Float switch 3.1.6 Control when the Operation Mode is Set to “Auto” Setting the operation mode to “Auto”...

  • Page 112: Defrost Control

    ESIE12-06 Function Details Dew condensation prevention control Dry operation with horizontal airflow is carried out for 1 hour. (P2) Note: 1. When there is any change to heating/fan modes, airflow direction and operation ON/OFF state during dew condensation prevention control, this control is reset. 3.1.8 Freeze-up Prevention Control The unit will perform the forced thermostat off function in following conditions: Thermostat off due to freeze-up prevention.

  • Page 113: Outdoor Unit

    Function Details ESIE12-06 Outdoor Unit 3.2.1 Abnormal Stop When the following items show abnormal values, the thermostat turns OFF and error is determined based on the number of retry in order to protect the compressor and other devices. Item Criteria Number of retry Low pressure 0.12 MPa or less continues for 5 minutes...
  • Page 114 ESIE12-06 Function Details 3.2.3 Preheating Operation Control After the compressor has been turned OFF, the preheating operation control will be activated in order to avoid refrigerant from dissolving in the compressor oil and quick increase of heating level during the heating operation. Starting Conditions •...
  • Page 115 Function Details ESIE12-06 3.2.6 Room Thermostat Control Based on the difference between the set temperature by remote controller and indoor unit suction air temperature, the thermo. is turned on and off. T = Indoor suction air temperature – temperature set by remote controller (Cooling) T = Temperature set by remote controller –...
  • Page 116 ESIE12-06 Function Details 3.2.7 Compressor Step The compressor operation frequency is controlled in order to keep a constant evaporation temperature in cooling and a constant condensing temperature in heating. t cool = Remote controller set temperature - Indoor return air temperature. Cooling Depending on t cool and the cooling load, the target evaporating temperature will be a value between 2°C and 20°C.
  • Page 117 Function Details ESIE12-06 3.2.8 General Electronic Expansion Valve Control When cooling/heating, PI control of electronic expansion valve is conducted to keep the heat exchanger outlet subcooling degree constant. • Target heat exchanger outlet subcooling degree > actual heat exchanger outlet subcooling degree ...

  • Page 118: Low Pressure Protection Control

    ESIE12-06 Function Details 3.2.10 Night-time Quiet Operation A. Setting by Remote Controller Night-time quiet operation can be set by field setting from the wired remote controller. By estimating current time based on the change of outdoor air temperature, the low noise operation is automatically performed at night (from 22:00 to 8:00) by limiting the number of revolutions of outdoor unit fan and the operation frequency of the compressor.

  • Page 119: High Pressure Protection Control

    Function Details ESIE12-06 3.2.12 High Pressure Protection Control In order to prevent abnormal high pressures in the system and hence avoiding activation of the high pressure safety device the below control function will be activated. (Cooling) (Heating) Normal operation Normal operation •...
  • Page 120 ESIE12-06 Function Details 3.2.14 Suction Pipe Superheat Protection Control (Only in Heating Operation) In case the suction superheat value in heating mode is too high, the oil return to the compressor will be insufficient. In order to avoid that the compressor oil will be accumulated in the outdoor unit heat exchanger, the upper limit frequency will be controlled.
  • Page 121 Function Details ESIE12-06 3.2.15 Discharge Pipe Temperature Protection Control Electronic expansion valve opening degree and the compressor operating frequency will be controlled in order to avoid abnormal high compressor temperatures. Td: Discharge pipe temperature Compressor Operating Frequency Control Normal operation •...
  • Page 122 ESIE12-06 Function Details 3.2.17 Thermostat OFF due to Outdoor Air Temperature (Only in Heating Operation) If outdoor air temperature is high, the unit conducts forced thermostat OFF at the following temperature to protect the system. Outdoor air temperature > 32°C 3.2.18 Inverter Current Protection Control Restricts compressor operation frequency to prevent compressor from tripping due to inverter overcurrent.
  • Page 123 Function Details ESIE12-06 3.2.19 Low Outdoor Air Temperature Control in Cooling Operation Controls compressor and outdoor unit fan under low outdoor air temperature condition to secure pressure difference between high and low pressure. Hp: High pressure Lp: Low pressure Ta: Outdoor air temperature Tfin: Inverter fin temperature Hp-Lp >...
  • Page 124 ESIE12-06 Function Details 3.2.20 Protection Control by Overall Current Monitors the overall current and restricts the upper limit compressor operating frequency to prevent circuit breakers from exceeding the rated capacity. Normal operation Outdoor unit current £ upper limit current value &...

  • Page 125: Defrost Operation

    Function Details ESIE12-06 3.2.25 Oil Recovery Operation When the compressor runs at low frequency for a long time, the failure of recovering oil may cause the shortage of oil level. Therefore, the oil recovery operation is performed by increasing the compressor operation frequency for five minutes. ...
  • Page 126 ESIE12-06 Function Details Defrost Control Defrosting start Defrosting complete previous control A Hz Compressor 0 Hz Four way valve 480 pls Electronic (wet protection control) expansion valve 0 pls (5~60 sec.) 0 pls (5 sec.) Outdoor unit fan Indoor unit fan Model RZQG71L Step 25...
  • Page 127 Function Details ESIE12-06 3.2.29 Simulated Operation Function In case of a thermistor error, simulated operation is performed in two different ways as shown below even while the error is detected. A. Operation continues while the error code is displayed on the remote controller. Applicable thermistors ·...
  • Page 128 ESIE12-06 Function Details 3.2.30 Test Operation Control When operating in cooling mode for the first time after installation or operating in cooling mode by pressing the indoor unit inspection button, the unit will perform a test operation for about 3 minutes.
  • Page 129 Function Details ESIE12-06 3.2.31 Improved Comfort in Cooling by Te Control You can increase the comfort feeling for the customer by limiting the lower Te value. With higher Te values, the latent capacity will drop (and eventually the sensible capacity). The EER should increase =>...
  • Page 130 ESIE12-06 Function Details Cooling: Heating: Note: If quick cooling/heating function is selected by the customer via remote controller, the unit will go into quick cooling/heating for 20 minutes, neglecting the selected Te/Tc. After 20 minutes, the selected Te/Tc setting will receive priority again. Example: The customer has to make a choice: Fix the Te Lower limit and/or the Tc upper limit on a certain value.
  • Page 131 Function Details ESIE12-06 limit and/or Tc Upper limit. Function and Control...

  • Page 132: Part 6 Field Setting

    ESIE12-06 Part 6 Field Setting 1. Test Operation ..................122 1.1 Pre-run Checks ..................122 1.2 Remote Controller Confirmation............122 1.3 Test Run....................123 1.4 Precautions Regarding Test Run ............123 1.5 Failure Diagnosis at the Moment of First Installation ......124 2. Field Setting from Remote Controller..........125 2.1 Wired Remote Controller..............125 2.2 Wireless Remote Controller ..............128 2.3 Settings Contents and Code No.

  • Page 133: Test Operation

    Test Operation ESIE12-06 1. Test Operation WARNING Live parts can be easily touched by accident. Never leave the unit unattended during installation or servicing when the service panel is removed. Never perform a test run with the discharge piping thermistor (R2T) and suction piping thermistor (R3T) removed, as this might break the compressor.

  • Page 134: Test Run

    ESIE12-06 Test Operation Test Run 1. Make sure the liquid and gas stop valves are open. Opening direction Liquid side Gas side Remove the cap and turn counterclockwise with a hex wrench until it stops 2. Be sure to close the front side panel before operation, as not doing so can cause electric shock.

  • Page 135: Failure Diagnosis At The Moment Of First Installation

    Test Operation ESIE12-06 Failure Diagnosis at the Moment of First Installation • In case nothing is displayed on the remote controller (the current set temperature does not display), check for any of the following abnormalities before you can diagnose possible malfunction codes.

  • Page 136: Field Setting From Remote Controller

    ESIE12-06 Field Setting from Remote Controller 2. Field Setting from Remote Controller Individual function of indoor unit can be changed from the remote controller. At the time of installation or after service inspection / repair, make the local setting in accordance with the following description.
  • Page 137 Field Setting from Remote Controller ESIE12-06 2.1.2 BRC1E51/52A7 <Basic screen> Press and hold Cancel button for 4 seconds or more. Field setting menu is displayed. Select Field setting list in the field setting menu, and press Menu/Enter button. Field setting list screen is displayed.
  • Page 138 ESIE12-06 Field Setting from Remote Controller Press Menu/Enter button. Setting <Setting confirmation screen> confirmation screen is displayed. Select and press Menu/Enter button. Setting details are determined and field setting list screen returns. In the case of multiple setting changes, repeat “(3)” to “(7)”. After all setting changes are completed, press Cancel button twice.

  • Page 139: Wireless Remote Controller

    Field Setting from Remote Controller ESIE12-06 Wireless Remote Controller UP button Mode No. Field setting mode DOWN button RESERVE button First code No. MODE button Second code No. INSPECTION/TEST button Setting To set the field settings, you have to change: ...

  • Page 140: Settings Contents And Code No. For Indoor Units

    ESIE12-06 Field Setting from Remote Controller Settings Contents and Code No. for Indoor Units First Second Code No. Mode Code Description of Setting Filter cleaning sign interval Long life filter 2,500 hrs. 1,250 hrs. — — 10 (20) Remote controller thermistor Enabled Disabled —...
  • Page 141 Field Setting from Remote Controller ESIE12-06 When using remote controller Set temperature (˚C) Cooling Room temperature thermistor Room temperature thermistor Suction air thermistor Suction air thermistor Suction air thermistor Suction air thermistor Suction air thermistor Suction air thermistor Suction air thermistor Suction air thermistor Suction temperature (˚C) Set temperature (˚C)
  • Page 142 ESIE12-06 Field Setting from Remote Controller Airflow Rate Set the airflow when thermostat OFF by the combination of "Fan OFF at Thermostat OFF" 11(21)-2," Fan speed heating thermostat OFF" 12(22)-3 and "Fan speed cooling thermostat OFF" 12(22)-6. A : 6 minutes OFF / 1 minute LL B : 6 minutes OFF / 1 minute setting airflow C : 6 minutes OFF / 1 minute L Set the airflow by the combination of 3 modes as below.
  • Page 143 Field Setting from Remote Controller ESIE12-06 Automatic Operation Mode Control When selecting “Automatic Operation Mode” with the remote controller, conducts the most comfortable operation in which you do not feel too cool or too hot. Outdoor air temperature Calculates and controls the optimum indoor Indoor air temperature temperature Temperature set by remote controller...
  • Page 144 ESIE12-06 Field Setting from Remote Controller Airflow Direction Setting Set the air flow direction of indoor units as below. (Set when optional air outlet blocking pad has been installed.) Mode No. First Code No. Second Code No. Setting F : 4-direction air flow 13 (23) T : 3-direction air flow Airflow Range Setting...

  • Page 145: Overview Of The Field Setting On The Outdoor Units

    Field Setting from Remote Controller ESIE12-06 Overview of the Field Setting on the Outdoor Units Remote The table below contains the remote controller settings. controller settings Mode First Description Second Code No. Details Code Night time low Disabled Automatic Capacity Automatic —...

  • Page 146: Quiet (Low Noise) Operation

    ESIE12-06 Field Setting from Remote Controller Quiet (Low Noise) Operation Purpose Lower the operation sound of the outdoor unit. Setting Silent Operation can be activated by: 1. Automatic control (By field setting from remote controller) 2. External activation (from optional PCB KRP58M) 2.5.1 Quiet (Low Noise) Operation by Automatic Control Table Silent operation can be set by field setting from the wired remote controller:...
  • Page 147 Field Setting from Remote Controller ESIE12-06 2.5.2 External Activation from Optional PCB Graph Quiet (low noise) operation can also be activated from the optional PCB. Transmission connector (on outdoor PCB X6A) Power supply connector (on outdoor PCB X77A) 1 2 3 4 X800M X801M 1 LNOP COM...

  • Page 148: I-Demand Function

    ESIE12-06 Field Setting from Remote Controller I-Demand Function Purpose Set a limitation towards the power consumption from the system.(e.g. budget control, limit power consumption during peak moments,..) Setting 3 different demand setting can be selected by using terminal X801M:  Demand 1  Close contact between COM and contact 1 ...

  • Page 149: Setting For Low Humidity Application

    Field Setting from Remote Controller ESIE12-06 Setting for Low Humidity Application Purpose Can be set when using the RZQG units for year round cooling in low humidity applications such as computer rooms (EDP rooms), technical rooms, etc...to increase the capacity of the unit. Definition of Low Humidity Area Relative...
  • Page 150 ESIE12-06 Field Setting from Remote Controller Graph 1 Target evaporating temperature control in case of factory setting 16(26)-2-01: Te target acceptable area Remote controller setting temp. Te target limited ≤ 20˚C (to protect the comp.) Te target limited ≤ Indoor temp. – 11˚ (not to rising wetbulb) Te (see note) target acceptable area...
  • Page 151 Field Setting from Remote Controller ESIE12-06 Graph 2 Target evaporating temperature control when "low humidity application" is selected. Field setting 16(26)-2-03: Te target acceptable area Remote controller setting temp. Te target Te target limited ≤ 20˚C (˚C) (to protect the comp.) Te (see note) target acceptable area Indoor temp.

  • Page 152: Thermostat Control

    ESIE12-06 Field Setting from Remote Controller Graph 3 Target evaporating temperature control when "low humidity application + freeze up operation prevention" is selected. Field setting 16(26)-2-04: Te target acceptable area Remote controller setting temp. Te target (˚C) Te target limited ≤ 20˚C (to protect the comp.) Te (see note) target acceptable area Indoor temp.

  • Page 153: Defrost Start Setting

    Field Setting from Remote Controller ESIE12-06 Capacity When "low humidity application" is selected. Field setting 16(26)-2-03: Indoor Temp. (°C-WB) Outdoor Temp. (°C-DB) Capacity (% of standard point) 0.62 0.76 0.86 0.95 1.00 1.02 1.07 1.11 0.62 0.76 0.86 0.95 1.00 1.02 1.07 1.11...

  • Page 154: Field Setting From Outdoor Unit Pcb

    ESIE12-06 Field Setting from Outdoor Unit PCB 3. Field Setting from Outdoor Unit PCB Location of DIP Switch and BS Button Various settings are available by using the DIP switches and the BS buttons on the PCB. Display Lamp MODE TEST L.N.O.P DEMAND...

  • Page 155: Field Setting For Outdoor Unit

    Field Setting from Outdoor Unit PCB ESIE12-06 Field Setting for Outdoor Unit 3.2.1 Setting by BS Buttons With "Setting mode 1," "Setting mode 2" and "Monitor mode," various settings and data can be checked. (1) Setting mode 1 The initial status (normal operation) is "Setting mode 1." This mode indicates operating status - "TEST (test operation),"...
  • Page 156 ESIE12-06 Field Setting from Outdoor Unit PCB 3.2.3 Setting Mode 2 In this mode, settings for the following items can be made. Press the MODE (BS1) button for 5 seconds and set to “Setting mode 2”. <Selection of setting conditions> Press the SET (BS2) button and set to the setting condition you want.
  • Page 157 Field Setting from Outdoor Unit PCB ESIE12-06  Setting of Demand 2 operation With this setting, compressor operation can be controlled to reduce power consumption. (60% - 80% demand is available when a demand adapter (optional accessory) is used.) Setting item Setting condition Description Operates with 30% of rated...

  • Page 158: Setting Of Refrigerant Recovery Mode

    ESIE12-06 Field Setting from Outdoor Unit PCB  Setting of Refrigerant Recovery Mode When a refrigerant recovery unit is connected onsite to recover refrigerant, fully open the expansion valve of the outdoor unit to help the recovery. (1) Stop operation. (2) Turn ON refrigerant recovery mode by performing the following steps.
  • Page 159 Field Setting from Outdoor Unit PCB ESIE12-06 3.2.4 Monitor Mode In this mode, the following items can be checked by using the BS buttons. Setting item LED display Data display To enter the monitor mode, press the MODE H1P H2P H3P H4P H5P H6P H7P (BS1) button when in “Setting mode 1”.
  • Page 160 ESIE12-06 Field Setting from Outdoor Unit PCB 3.2.5 List of Contents of Retry and Error Take the following steps to check contents of retry and error. To enter "Monitor mode," press the MODE (BS1) <Display of RETURN 2> button when in "Setting mode 1." When SET (BS2) button is pressed, the LED display for RETURN 2 turns ON.
  • Page 161 Field Setting from Outdoor Unit PCB ESIE12-06 Outdoor unit Field Setting...
  • Page 162 ESIE12-06 Field Setting from Outdoor Unit PCB 3.2.7 Troubleshooting Field Setting...

  • Page 163: Emergency Operation

    Emergency Operation ESIE12-06 4. Emergency Operation Forced Operation As emergency operational methods, there are three methods as shown below. Choose the best method that is suitable for each purpose of use. Operation Activation Name Application Setting method Thermistor Drain Remark detection protection Pump...
  • Page 164 ESIE12-06 Emergency Operation Operation by the Test Operation Mode As test run by the test operation mode, there are two methods as shown below. <Test Operation by Wireless Remote Controller> 1. Press the Inspection / Test Operation button 4 times. Press the Inspection / Test Operation button 4 times.
  • Page 165 Emergency Operation ESIE12-06 Field Setting...

  • Page 166: Part 7 Service Diagnosis

    ESIE12-06 Part 7 Service Diagnosis 1. Maintenance Inspection ..............1.1 Overview ....................2. Symptom-based Troubleshooting ............2.1 Overview ....................2.2 Equipment does not Operate ............... 2.3 Indoor Unit Fan Operates, but Compressor does not Operate .... 2.4 Cooling / Heating Operation Starts but Stops Immediately ....164 2.5 After Unit Shuts Down, It cannot be Restarted for a While ....165 2.6 Equipment Operates but does not Provide Cooling ......167 2.7 Equipment Operates but does not Provide Heating ......169...
  • Page 167 ESIE12-06 4.26 Transmission System Abnormality (between Control and Inverter PCB)..................220 4.27 Open Phase or Power Supply Voltage Imbalance .......222 4.28 Defective Capacity Setting ..............223 4.29 Refrigerant Shortage (Alert) ..............224 4.30 Refrigerant Shortage (Error)..............225 4.31 Power Supply Voltage Abnormality ............227 4.32 Transmission Error between Indoor and Outdoor Unit......229 4.33 Transmission Error Between Remote Controller and Indoor Unit ..232 4.34 Transmission Error between MAIN Remote Controller and SUB Remote Controller................233...

  • Page 168: Maintenance Inspection

    ESIE12-06 Maintenance Inspection 1. Maintenance Inspection Overview When performing maintenance, you should at least perform the following inspections: Indoor unit Transmission wiring between indoor and outdoor units Is the air filter dirty? What about switch capacity? What about cable thickness? To dedicated What about voltage and current? breaker...
  • Page 169 Maintenance Inspection ESIE12-06 Correlation of Air-Conditioner’s Operation Status and Pressure / Running Current What happens in comparison to normal values is summarized in the table below. (Measured for 15 ~ 20 minutes or more after operation starts.) Cooling Air-Conditioner Status Low Pressure High Pressure Running Current...

  • Page 170: Symptom-Based Troubleshooting

    ESIE12-06 Symptom-based Troubleshooting 2. Symptom-based Troubleshooting Overview Symptom Details of Measures Equipment does not operate. Refer to P.160 Indoor fan operates, but compressor does not Refer to P.162 operate. Cooling/heating operation starts but stops Refer to P.164 immediately. After unit shuts down, it cannot be restarted for a Refer to P.165 while.

  • Page 171: Equipment Does Not Operate

    Symptom-based Troubleshooting ESIE12-06 Equipment does not Operate Applicable Model All models of SkyAir series Supposed  Fuse blown or disorder of contact in operation circuit Causes  Defective operation switch or contact point  Defective high pressure switch  Defective magnetic switch for fan motor ...

  • Page 172: Troubleshooting

    ESIE12-06 Symptom-based Troubleshooting Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Is the power switch OFF or fuse for power Turn ON the power switch or switch blown? replace the fuse.

  • Page 173: Indoor Unit Fan Operates, But Compressor Does Not Operate

    Symptom-based Troubleshooting ESIE12-06 Indoor Unit Fan Operates, but Compressor does not Operate Applicable Model All models of SkyAir series Supposed  Fuse blown or disorder of contact in operation circuit Causes  Defective thermistor  Defective indoor/outdoor unit PCB  Defective magnetic switch ...
  • Page 174 ESIE12-06 Symptom-based Troubleshooting Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. · Indoor unit fan runs at set airflow rate. · (In cooling operation) When suction air thermistor temperature is higher than set temperature ·...

  • Page 175: Cooling / Heating Operation Starts But Stops Immediately

    Symptom-based Troubleshooting ESIE12-06 Cooling / Heating Operation Starts but Stops Immediately Applicable Model All models of SkyAir series Supposed  Overcharge of refrigerant Causes  Air mixed in refrigerant system  Defective pressure switch  Defective magnetic switch for outdoor unit fan motor ...

  • Page 176: After Unit Shuts Down, It Cannot Be Restarted For A While

    ESIE12-06 Symptom-based Troubleshooting After Unit Shuts Down, It cannot be Restarted for a While Applicable Model All models of SkyAir series Supposed  Overcurrent relay (for compressor) Causes Overcurrent relay may act due to the following reasons Lower voltage of power supply Excess level of high pressure Insufficient size of power cable Defective compressor...
  • Page 177 Symptom-based Troubleshooting ESIE12-06 Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Turn the operation switch ON and OFF, then wait at ON side. Does the unit start operation after Normal.

  • Page 178: Equipment Operates But Does Not Provide Cooling

    ESIE12-06 Symptom-based Troubleshooting Equipment Operates but does not Provide Cooling Applicable Model All models of SkyAir series Supposed  Overcurrent relay (for compressor) Causes Overcurrent relay may act due to the following reasons Lower voltage of power supply Excess level of high pressure Insufficient size of power cable Defective compressor ...
  • Page 179 Symptom-based Troubleshooting ESIE12-06 Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Measure the temperature of suction air and discharge air. Temperature difference = Suction air temp. – Discharge air temp. Temperature Does the heat difference for cooling should be...

  • Page 180: Equipment Operates But Does Not Provide Heating

    ESIE12-06 Symptom-based Troubleshooting Equipment Operates but does not Provide Heating Applicable Model All models of SkyAir series Supposed  Overcharge of refrigerant Causes  Air mixed in refrigerant system  Defective pressure switch  Defective magnetic switch for outdoor unit fan motor ...
  • Page 181 Symptom-based Troubleshooting ESIE12-06 Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Is this first starting This is normal. Heating after installation? operation will be conducted after 2 or 3 minutes (∗). Is the unit in defrost mode? Wait for a while.

  • Page 182: Equipment Discharges White Mist

    ESIE12-06 Symptom-based Troubleshooting Equipment Discharges White Mist Applicable Model All models of SkyAir series Supposed  Humid installation site Causes  Installation site is dirty and with dense oil mists.  Soiled heat exchanger  Clogged air filter  Defective fan motor Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.

  • Page 183: Equipment Produces Loud Noise Or Vibration

    Symptom-based Troubleshooting ESIE12-06 Equipment Produces Loud Noise or Vibration Applicable Model All models of SkyAir series Supposed  Defective installation Causes  Overcharge of refrigerant  Air mixed in refrigerant system  Flushing noise due to refrigerant shortage. (Sound of shoo...) Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.

  • Page 184: Equipment Discharges Dust

    ESIE12-06 Symptom-based Troubleshooting 2.10 Equipment Discharges Dust Applicable Model All models of SkyAir series Supposed  Carpet Causes  Animal hair  Application (cloth shop,...) Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Does the trouble generate at the time of operation start...

  • Page 185: Remote Controller Lcd Displays "88

    Symptom-based Troubleshooting ESIE12-06 2.11 Remote Controller LCD Displays " " Applicable Model All models of SkyAir series Supposed Causes Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Trouble generates just after power The unit is checking to confirm supply ON.

  • Page 186: Swing Flap Does Not Operate

    ESIE12-06 Symptom-based Troubleshooting 2.12 Swing Flap does not Operate Applicable All models of SkyAir series Models Method of Error Visual check Detection Error Decision When ON/OFF of the micro-switch for positioning cannot be reversed even through the swing Conditions flap motor for a specified amount of time (about 30 seconds). Remark Some functions can force the swing flap into a fixed position, although swing mode is selected on the remote controller.
  • Page 187 Symptom-based Troubleshooting ESIE12-06 Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Are the connectors (∗) Connect correctly. correctly connected? Is the limit switch’s transfer Connect correctly. connector correctly connected? Turn the power supply off once and back on, and check whether the...

  • Page 188: Troubleshooting By Led Indications

    ESIE12-06 Troubleshooting by LED Indications 3. Troubleshooting by LED Indications Troubleshooting by LED on the Indoor Unit Foreword Troubleshooting can be carried out by service monitor LED (green). (Blinks when normal) k : LED on / h : LED off / l : LED blinks Micro-computer Normal Monitor Contents/Processing...

  • Page 189: Troubleshooting By Remote Controller

    Troubleshooting by Remote Controller ESIE12-06 4. Troubleshooting by Remote Controller Procedure of Self-diagnosis by Remote Controller 4.1.1 Wired Remote Controller — BRC1D528 If operation stops due to error, the remote controller’s operation LED blinks, and error code is displayed. (Even if stop operation is carried out, error contents are displayed when the inspection mode is entered.) The error code enables you to tell what kind of error caused operation to stop.
  • Page 190 ESIE12-06 Troubleshooting by Remote Controller 4.1.2 Wired Remote Controller — BRC1E51/52A7 The following will be displayed on the screen when a malfunction (or a warning) occurs during operation. Check the malfunction code and take the corrective action specified for the particular model. Screen Operation lamp (1) Checking a malfunction or warning...
  • Page 191 Troubleshooting by Remote Controller ESIE12-06 4.1.3 Wireless Remote Controller If unit stops due to an error, the operation indicating LED on the signal receiving part of indoor unit flashes. The error code can be determined by following the procedure described below. (The error code is displayed when an operation error has occurred.
  • Page 192 ESIE12-06 Troubleshooting by Remote Controller Normal status Enters inspection mode from normal status when the INSPECTION/ TEST button is pressed. 1 Press INSPECTION/TEST button. If no button is pressed for 1 minute, equipment returns to normal status. 3 Press MODE selector button.

  • Page 193: Error Codes And Description

    Troubleshooting by Remote Controller ESIE12-06 Error Codes and Description Remote Controller Contents of Error Reference Page Display Indoor Unit Indoor unit PCB abnormality Drain water level system abnormality Indoor unit fan motor abnormality Capacity setting abnormality Transmission Error (between indoor unit PCB and adaptor PCB) Heat exchanger thermistor system abnormality Intermediate heat exchanger thermistor system abnormality Suction air thermistor system abnormality...

  • Page 194: Safety Devices

    ESIE12-06 Troubleshooting by Remote Controller Safety Devices 4.3.1 Outdoor Unit High pressure switch Model Fuse Open Close RZQG71L 4.0 MPa +0/– 0.15 3.0 MPa ± 0.15 6.3A/250V (F1U), 3.15A/250V (F6U) RZQG100L 6.3A/250V (F1U, F2U, F3U), RZQG125L 5A/250V (F6U) RZQG160L 4.3.2 Indoor Unit Thermal protector Model Fuse...

  • Page 195: Indoor Unit Pcb Abnormality

    Troubleshooting by Remote Controller ESIE12-06 Indoor Unit PCB Abnormality Remote Controller Display Applicable All models of indoor unit Models Method of Error Check data from E PROM. Detection Error Decision The error is generated when the data from the E PROM is not received correctly.

  • Page 196: Drain Water Level System Abnormality

    ESIE12-06 Troubleshooting by Remote Controller Drain Water Level System Abnormality Remote Controller Display Applicable All models of indoor unit Models Method of Error By float switch OFF detection Detection Error Decision The error is generated when the water level reaches its upper limit and when the float switch Conditions turns OFF.
  • Page 197 Troubleshooting by Remote Controller ESIE12-06 Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Is the unit a cassette type? Is the optional drain pump kit installed? Is the short circuit connector connected Connect the short circuit to X15A on the indoor...

  • Page 198: Indoor Unit Fan Motor Abnormality

    ESIE12-06 Troubleshooting by Remote Controller Indoor Unit Fan Motor Abnormality Remote Controller Display Applicable All models of indoor unit Models Method of Error Detection of abnormal rotation speed of fan motor by signal from the fan motor Detection Error Decision The error is generated when the rotation speed of the fan motor are not detected while the Conditions output voltage to the fan is at its maximum.

  • Page 199: Capacity Setting Abnormality

    Troubleshooting by Remote Controller ESIE12-06 Capacity Setting Abnormality Remote Controller Display Applicable All models of indoor unit Models Method of Error Capacity is determined according to resistance of the capacity setting adaptor and the memory Detection inside the IC memory on the indoor unit PCB, and whether the value is normal or abnormal is determined.

  • Page 200: Transmission Error (Between Indoor Unit Pcb And Adaptor Pcb)

    ESIE12-06 Troubleshooting by Remote Controller Transmission Error (between Indoor Unit PCB and Adaptor PCB) Remote Controller Display Applicable FCQG Models Method of Error Check the condition of transmission between indoor unit PCB (A1P) and adaptor PCB (A2P) Detection using micro-computer. Error Decision When normal transmission is not conducted for certain duration (15 seconds or more).
  • Page 201 Troubleshooting by Remote Controller ESIE12-06 Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Is the connection of connector X70A on indoor unit Connect the connector PCB (A1P) normal? accurately.

  • Page 202: Thermistor Abnormality

    ESIE12-06 Troubleshooting by Remote Controller Thermistor Abnormality C4, C5, C9 Remote Controller Display Applicable All models of indoor unit Models Method of Error The error is detected by temperature detected by thermistor. Detection Error Decision When the thermistor becomes disconnected or shorted while the unit is running. Conditions Supposed ...

  • Page 203: Humidity Sensor System Abnormality

    Troubleshooting by Remote Controller ESIE12-06 4.10 Humidity Sensor System Abnormality Remote Controller Display Applicable FCQG Models Method of Error Even if error occurs, operation still continue. Detection The error is detected by humidity (output voltage) detected by humidity sensor. Error Decision The error is generated when the humidity sensor becomes disconnected or shorted when the Conditions unit is running.

  • Page 204: Remote Controller Thermistor Abnormality

    ESIE12-06 Troubleshooting by Remote Controller 4.11 Remote Controller Thermistor Abnormality Remote Controller Display Applicable All models of indoor unit Models Method of Error Even if remote controller thermistor is faulty, system is possible to operate by indoor unit suction Detection air thermistor.

  • Page 205: Outdoor Unit Pcb Abnormality

    Troubleshooting by Remote Controller ESIE12-06 4.12 Outdoor Unit PCB Abnormality Remote Controller Display Applicable RZQG Models Method of Error Micro-computer checks whether E PROM is normal. Detection Error Decision When E PROM error when turning the power supply ON Conditions Supposed ...

  • Page 206: High Pressure Abnormality (Detected By The High Pressure Switch)

    ESIE12-06 Troubleshooting by Remote Controller 4.13 High Pressure Abnormality (Detected by the High Pressure Switch) 4.13.1 RZQG71, 100 Remote Controller Display Applicable RZQG71, 100 Models Method of Error [In cooling] Detection  The error is detected by the outdoor unit intermediate heat exchanger thermistor (R5T). [In heating] ...
  • Page 207 Troubleshooting by Remote Controller ESIE12-06 the operation Troubleshooting " " of electronic expansion valve normal? CHECK 2 CHECK 9 High pressure is too high. Replace the outdoor unit PCB (A2P) If error is displayed again, replace the inverter PCB (A1P). [In heating] Are the characteristics of the...
  • Page 208 ESIE12-06 Troubleshooting by Remote Controller 4.13.2 RZQG125, 140 Remote Controller Display Applicable RZQG125, 140 Models Method of Error [In cooling] Detection  Detect the continuity of high pressure switch (S1PH) with the protection device circuit.  The error is detected by the outdoor unit intermediate heat exchanger thermistor (R5T). [In heating] ...
  • Page 209 Troubleshooting by Remote Controller ESIE12-06 Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Is the stop valve open? Open the stop valve. Are the connection of the connector on PCB and the Correctly connect.

  • Page 210: Actuation Of Pressure Sensor

    ESIE12-06 Troubleshooting by Remote Controller 4.14 Actuation of Pressure Sensor Remote Controller Display Applicable RZQG Models Method of Error [In cooling] Detection  Detect error by the indoor unit intermediate thermistor (R3T). [In heating]  Detect error by the intermediate heat exchanger thermistor (R5T). Error Decision [In cooling] Conditions...
  • Page 211 Troubleshooting by Remote Controller ESIE12-06 Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Is the stop valve open? Open the stop valve. Is it in cooling operation? (In heating operation) the heat (In cooling...

  • Page 212: Compressor Motor Lock

    ESIE12-06 Troubleshooting by Remote Controller 4.15 Compressor Motor Lock Remote Controller Display Applicable RZQG Models Method of Error Detect the motor lock when the compressor is energized. Detection Error Decision If the motor rotor does not rotate when the compressor is energized. Conditions Supposed ...

  • Page 213: Outdoor Unit Fan Motor Abnormality

    Troubleshooting by Remote Controller ESIE12-06 4.16 Outdoor Unit Fan Motor Abnormality Remote Controller Display Applicable RZQG Models Method of Error Abnormality of fan motor system is detected according to the fan speed detected by hall IC Detection when the fan motor runs. Error Decision ...
  • Page 214 ESIE12-06 Troubleshooting by Remote Controller Is there any foreign matter around Remove the foreign matter. the fan? Remove the fan motor connector. Is the fan Replace the fan motor. rotatable easily by hand? CHECK 6 Check the resistance value for the fan motor.

  • Page 215: Electronic Expansion Valve Abnormality

    Troubleshooting by Remote Controller ESIE12-06 4.17 Electronic Expansion Valve Abnormality Remote Controller Display Applicable RZQG Models Method of Error  The error is detected whether the continuity of electronic expansion valve exist or not. Detection  The error is detected by the suction pipe superheat degree, discharge pipe superheat degree and electronic expansion valve opening degree.
  • Page 216 ESIE12-06 Troubleshooting by Remote Controller Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Turn OFF the power supply and turn the power ON again. Error is displayed again? Is the electronic expansion valve connector properly...
  • Page 217 Troubleshooting by Remote Controller ESIE12-06 the characteristics Replace the defective of each thermistor normal? thermistor. CHECK 1 the pressure sensor Replace the pressure sensor. characteristics normal? CHECK 5 Actually, it is in wet operation. Refer to CHECK 8 to eliminate the causes of wet operation.

  • Page 218: Discharge Pipe Temperature Control

    ESIE12-06 Troubleshooting by Remote Controller 4.18 Discharge Pipe Temperature Control Remote Controller Display Applicable RZQG Models Method of Error The error is detected according to the temperature detected by the discharge pipe temperature Detection sensor. Error Decision  When the discharge pipe temperature rises to an abnormally high level Conditions ...
  • Page 219 Troubleshooting by Remote Controller ESIE12-06 Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Is the discharge pipe temperature Abnormality in refrigerant above the criteria? system such as refrigerant ( ∗1) shortage, faulty compressor, etc.

  • Page 220: High Pressure Switch System Abnormality

    ESIE12-06 Troubleshooting by Remote Controller 4.19 High Pressure Switch System Abnormality Remote Controller Display Applicable RZQG125, 140 Models Method of Error The protection device circuit checks continuity in the high pressure switch (S1PH). Detection Error Decision When there is no continuity in the high pressure switch during compressor stops operating. Conditions Supposed ...

  • Page 221: Thermistor System Abnormality

    Troubleshooting by Remote Controller ESIE12-06 4.20 Thermistor System Abnormality H9, J3, J5, J6, J7, J8 Remote Controller Display Applicable RZQG Models Method of Error The error is detected according to the temperature detected by each individual thermistor. Detection Error Decision When thermistor is disconnected or short circuited during operation Conditions Supposed...

  • Page 222: Outdoor Unit Pcb Abnormality

    ESIE12-06 Troubleshooting by Remote Controller 4.21 Outdoor Unit PCB Abnormality Remote Controller Display Applicable RZQG Models Method of Error  Detect error by current value during waveform output before compressor startup. Detection  Detect error by current sensor value during synchronized operation at the time of startup. ...
  • Page 223 Troubleshooting by Remote Controller ESIE12-06 Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Is the power supply Request an improvement to voltage between 180 and 220 VAC? make the power supply voltage fall within the standard range.

  • Page 224: Radiation Fin Temperature Rise

    ESIE12-06 Troubleshooting by Remote Controller 4.22 Radiation Fin Temperature Rise Remote Controller Display Applicable RZQG Models Method of Error Radiation fin temperature is detected by the radiation fin thermistor. Detection Error Decision When the temperature of the inverter radiation fin rises abnormally due to faulty heat Conditions dissipation.
  • Page 225 Troubleshooting by Remote Controller ESIE12-06 Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Can it be considered Eliminate the cause. that the radiation fin temperature was high? (∗1) Is the connector of the radiation fin thermistor Connect correctly.

  • Page 226: Output Overcurrent Detection

    ESIE12-06 Troubleshooting by Remote Controller 4.23 Output Overcurrent Detection Remote Controller Display Applicable RZQG Models Method of Error The error is detected by converting the current flowing to power transistor into voltage with CT1 Detection (DC current sensor). Error Decision When overcurrent has run to power transistor.
  • Page 227 Troubleshooting by Remote Controller ESIE12-06 CHECK 4 Continuity check in the power Replace the outdoor unit PCB. transistor (IGBT). Is the continuity normal? Turn the power ON, and then operate the test operation. Continue the Go to the other troubleshooting. Error is displayed again? operation normally.

  • Page 228: Electronic Thermal (Time Lag)

    ESIE12-06 Troubleshooting by Remote Controller 4.24 Electronic Thermal (Time Lag) Remote Controller Display Applicable RZQG Models Method of Error The error is detected from the current flowing to power transistor into voltage with CT1 (DC Detection current sensor). Error Decision When compressor overload (except for when startup) is detected.
  • Page 229 Troubleshooting by Remote Controller ESIE12-06 Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Is the secondary current of the inverter higher Is the stop valve opened? Open the stop valve. than A (∗1) for each phase? CHECK 2...

  • Page 230: Stall Prevention (Time Lag)

    ESIE12-06 Troubleshooting by Remote Controller 4.25 Stall Prevention (Time Lag) Remote Controller Display Applicable RZQG Models Method of Error The error is detected by converting the current flowing to power transistor into voltage with CT1 Detection (DC current sensor). Inverter PCB detects the disorder of position signal. Error Decision When compressor overload and change of load are detected when startup Conditions...

  • Page 231: Transmission System Abnormality (Between Control And Inverter Pcb)

    Troubleshooting by Remote Controller ESIE12-06 Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Check the installation conditions. Is the stop valve open? Open the stop valve. Is the difference between high and low pressure Insufficient pressure before startup not more...

  • Page 232: Transmission System Abnormality (Between Control And Inverter Pcb)

    ESIE12-06 Troubleshooting by Remote Controller 4.26 Transmission System Abnormality (between Control and Inverter PCB) Remote Controller Display Applicable RZQG Models Method of Error Check whether transmission between control and inverter PCB is carried out normally. Detection Error Decision When the transmission is not carried out in a specified period of time or longer Conditions Supposed ...

  • Page 233: Open Phase Or Power Supply Voltage Imbalance

    Troubleshooting by Remote Controller ESIE12-06 4.27 Open Phase or Power Supply Voltage Imbalance Remote Controller Display Applicable RZQG Models Method of Error The error is detected according to the voltage waveform of main circuit capacitor built in Detection inverter. Error Decision When the aforementioned voltage waveform becomes identical with the waveform of the power Conditions supply open phase.

  • Page 234: Defective Capacity Setting

    ESIE12-06 Troubleshooting by Remote Controller 4.28 Defective Capacity Setting Remote Controller Display Applicable RZQG Models Method of Error Check whether set value written in E PROM (at factory) or set value of capacity setting adaptor Detection (for spare) is the same as outdoor unit capacity. Error Decision When the set value on E PROM differs from the outdoor unit capacity or a capacity setting...

  • Page 235: Refrigerant Shortage (Alert)

    Troubleshooting by Remote Controller ESIE12-06 4.29 Refrigerant Shortage (Alert) Remote Controller Display Applicable RZQG Models Method of Error Refrigerant shortage is detected according to the electronic expansion valve opening degree Detection and measured temperatures and pressures. Error Decision (In cooling operation) Conditions When the electronic expansion valve opens fully and low pressure is below 0.25 MPa continuously for 30 seconds.

  • Page 236: Refrigerant Shortage (Error)

    ESIE12-06 Troubleshooting by Remote Controller 4.30 Refrigerant Shortage (Error) Remote Controller Display Applicable RZQG Models Method of Error (In cooling) Detection Detection based on difference in temperature between temperature set by remote controller and indoor suction air temperature, electronic expansion valve opening degree, compressor frequency and low pressure.
  • Page 237 Troubleshooting by Remote Controller ESIE12-06 Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. CHECK 10 Check for refrigerant shortage. the refrigerant amount Collect refrigerant and recharge proper? a proper amount of refrigerant after vacuum drying.

  • Page 238: Power Supply Voltage Abnormality

    ESIE12-06 Troubleshooting by Remote Controller 4.31 Power Supply Voltage Abnormality Remote Controller Display Applicable RZQG Models Method of Error The error is detected according to the voltage of main circuit capacitor built in the inverter and Detection power supply voltage. Error Decision When the voltage of main circuit capacitor built in the inverter and power supply voltage drop or Conditions...
  • Page 239 Troubleshooting by Remote Controller ESIE12-06 Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Is the power Field factors supply voltage between 200±10% VAC? Remove the connector for fan motor on the PCB, and operate.

  • Page 240: Transmission Error Between Indoor And Outdoor Unit

    ESIE12-06 Troubleshooting by Remote Controller 4.32 Transmission Error between Indoor and Outdoor Unit Remote Controller Display Applicable RZQG Models Method of Error The error is generated when the micro-processor detects that the transmission between the Detection indoor and the outdoor unit is not normal over a certain amount of time. Error Decision When the transmission is not carried out normally over a certain amount of time.
  • Page 241 Troubleshooting by Remote Controller ESIE12-06 Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Is the power supply voltage Field factor between 180 and 220 VAC? Continue the condition that the blinking interval of HAP on Connect the connecting line of outdoor unit PCB is short (∗1)
  • Page 242 ESIE12-06 Troubleshooting by Remote Controller Check the resistance value of the outdoor fan motor. Is the resistance value of the Replace the outdoor fan motor. outdoor fan motor normal? Does the fuse (F6U) Make the fuse normal. have continuity? • In case of a fuse can be replaced, replace the fuse.

  • Page 243: Transmission Error Between Remote Controller And Indoor Unit

    Troubleshooting by Remote Controller ESIE12-06 4.33 Transmission Error Between Remote Controller and Indoor Unit Remote Controller Display Applicable All models of indoor unit Models Method of Error The error is generated when the micro-computer detects that the transmission between the Detection indoor and the outdoor unit is not normal over a certain amount of time.

  • Page 244: Transmission Error Between Main Remote Controller And Sub Remote Controller

    ESIE12-06 Troubleshooting by Remote Controller 4.34 Transmission Error between MAIN Remote Controller and SUB Remote Controller Remote Controller Display Applicable All models of indoor units Models Method of Error In case of controlling with 2- remote controller, check the system using micro-computer if signal Detection transmission between indoor unit and remote controller (main and sub) is normal.

  • Page 245: Field Setting Switch Abnormality

    Troubleshooting by Remote Controller ESIE12-06 4.35 Field Setting Switch Abnormality Remote Controller Display Applicable All models of indoor unit Models Method of Error Detection Error Decision Incorrect combination indoor unit and outdoor unit Conditions Improper field setting Supposed  Defective indoor unit PCB and wrong wiring Causes ...
  • Page 246 ESIE12-06 Troubleshooting by Remote Controller Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. the remote controllers connected to Adopt only one of the remote several indoor units? controllers. the remote controller wiring jumped Remove the jumper.

  • Page 247: Uc" Address Duplication Of Centralized Controller

    Troubleshooting by Remote Controller ESIE12-06 4.36 “ ” Address Duplication of Centralized Controller Remote Controller Display Applicable All models of indoor unit Models Centralized controller Method of Error The principal indoor unit detects the same address as that of its own on any other indoor unit. Detection Error Decision The error decision is made as soon as the abnormality aforementioned is detected.

  • Page 248: Transmission Error Between Centralized Controller And Indoor Unit

    ESIE12-06 Troubleshooting by Remote Controller 4.37 Transmission Error Between Centralized Controller and Indoor Unit Remote Controller Display Applicable All models of indoor units Models Centralized controller Schedule timer Method of Error Micro-computer checks if transmission between indoor unit and centralized controller is normal. Detection Error Decision When transmission is not carried out normally for a certain amount of time...
  • Page 249 Troubleshooting by Remote Controller ESIE12-06 Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. there any breaking and wrong wiring Make the wiring correct. of the connecting wires? the once- connected indoor unit Reset the all remote controllers equipment disconnected or the...

  • Page 250: Transmission Error Between Indoor And Outdoor Unit / Piping And Wiring Mismatch / Refrigerant Shortage

    ESIE12-06 Troubleshooting by Remote Controller 4.38 Transmission Error between Indoor and Outdoor Unit / Piping and Wiring Mismatch / Refrigerant Shortage Remote Controller Display Applicable RZQG Models Method of Error Check the transmission between the indoor and outdoor units with a micro-computer when the Detection power turned ON.
  • Page 251 Troubleshooting by Remote Controller ESIE12-06 Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Does " " appear when the power is turned ON? The phase of inter-unit wiring between Correctly connect inter-unit the indoor and outdoor units is incorrect.

  • Page 252: Check

    ESIE12-06 4.39 Check CHECK 1 Check the Thermistors Thermistors If the cause of the problem is related to the thermistors, then the thermistors should be checked prior to changing the PCB. For more information about these thermistors, see:  “Wiring Diagrams’’ on P.257 ...
  • Page 253 ESIE12-06 Thermistor Resistance / Temperature Characteristics Indoor unit FCQG, FHQG Thermistor Suction air thermistor Heat exchanger thermistor Intermediate heat exchanger thermistor Outdoor unit RZQG Thermistor Outdoor air thermistor Suction pipe thermistor Heat exchanger distributor pipe Intermediate heat exchanger thermistor Liquid pipe thermistor R10T Radiation fin thermistor TºC...
  • Page 254 ESIE12-06 Outdoor unit RZQG Thermistor Discharge pipe thermistor T°C k T°C k T°C k T°C k T°C k T°C k 640.44 624.65 72.32 50.5 70.96 13.35 100.5 13.15 609.31 594.43 69.64 51.5 68.34 12.95 101.5 12.76 579.96 565.78 67.06 52.5 65.82 12.57 102.5...
  • Page 255 ESIE12-06 CHECK 2 Evaluation of Abnormal High Pressure Abnormally high pressure level is mostly caused by the condenser side. The following contents are provided by service engineer based on their field checks. Further, the number is listed in the order of degree of influence.
  • Page 256 ESIE12-06 CHECK 3 Evaluation of Abnormal Low Pressure Abnormally low pressure level is mostly caused by the evaporator side. The following contents are provided based on field checking of service engineer. Further, the number is listed in the order of degree of influence. In Cooling Operation Check items (Possible causes) Judgement...
  • Page 257 ESIE12-06 CHECK 4 Check for Power Transistor Judgement according to the continuity check by using an analog tester: (1) Do not touch the charged area (high voltage) for 10 minutes after turning the power supply off. (2) If you must touch such an area, make sure that the power supply voltage of power transistor is 50 V or less.
  • Page 258 ESIE12-06 CHECK 5 Check Pressure Sensor Measure the voltage (DC) between pins 1 and 3 of the connector. Outdoor unit PCB (A1P) Connector Red Black White Micr-ocomputer A/D input Measure DC voltage here. Detected Pressure (Kg/cm²) MPa 51.0 45.9 40.8 35.7 30.6 25.5...
  • Page 259 ESIE12-06 CHECK 6 Fan Motor Signal Line (1) Turn the power supply off. (2) With the fan motor connector disconnected, measure the resistance between each pin, then make sure that the resistance is more than the value mentioned in the following table. 1 White Measurement point Judgement...
  • Page 260 ESIE12-06 CHECK 8 Check for Factors Causing Wet Operation Referring to the Fault Tree Analysis (FTA) shown below, identify the faulty points. Faulty crankcase heater Refrigerant dwelling Frequent starts and stops of the compressor ← Refer to Excessive refrigerant charging CHECK 9 ←...
  • Page 261 ESIE12-06 CHECK 9 Check for Excessive Refrigerant Charging As criteria for judging whether refrigerant is excessively charged or not, refer to the following operating conditions. <Diagnosis of excessive refrigerant charging> In cooling operation (1) Because high pressure rises due to excessive charging, overload control is carried out and capacity tends to run short.
  • Page 262 ESIE12-06 CHECK 10 Clogged Points Temperature differences must occur before or after the clogged points! COMP Indoor Unit Outdoor Unit Check points Check factor Causes Remedies Around Temperature  Dust Replace the electronic expansion difference  Choked moisture expansion valve. mechanism ...
  • Page 263 ESIE12-06 CHECK 11 Check for Inadequate Refrigerant As criteria for judging whether refrigerant is inadequate or not, refer to the following operating conditions. <Diagnosis of inadequate refrigerant> In cooling operation (1) As suction superheat degree increases due to refrigerant shortage, the electronic expansion valve tends to open (opens fully) in order to avoid overheat operation.
  • Page 264 ESIE12-06 <Diagnosis of inadequate refrigerant> In heating operation (1) As suction superheat degree increases due to refrigerant shortage, the electronic expansion valve tends to open (opens fully) to avoid overheat operation. (2) As suction superheat degree increases due to refrigerant shortage, compressor frequency decreases because suction superheat degree is controlled in order to prevent oil to the outdoor heat exchanger from being retained.
  • Page 265 ESIE12-06 Service Diagnosis...

  • Page 266: Part 8 Appendix

    ESIE12-06 Part 8 Appendix 1. Piping Diagrams..................256 1.1 RZQG71L .....................256 1.2 RZQG100-140L..................256 2. Wiring Diagrams..................257 2.1 Indoor Unit....................257 2.2 Outdoor Unit ..................258 3. Precautions for New Refrigerant (R-410A) .........259 3.1 Outline ....................259 3.2 Refrigerant Cylinders................261 3.3 Service Tools..................262 Appendix...

  • Page 267: Piping Diagrams

    Piping Diagrams ESIE12-06 1. Piping Diagrams RZQG71L Electronic expansion valve Filter Filter Outdoor heat exchanger 4 way valve Check valve Indoor heat exchanger Pressure switch (high) Service port (5/16" flare) Compressor Field piping φ 9.5 Accumulator C1220T-O Field piping φ 15.9 Accumulator Compressor C1220T-O...

  • Page 268: Wiring Diagrams

    ESIE12-06 Wiring Diagrams 2. Wiring Diagrams Indoor Unit 2.1.1 FCQG71-140 INDOOR UNIT PRINTED CIRCUIT BOARD PRINTED CIRCUIT BOARD R2T R3T S1L PRINTED CIRCUIT BOARD ( NOTE 2 ) INDOOR UNIT ( HUMIDITY SENSOR UNIT ) t˚ t˚ CENTRAL REMOTE CONTROLLER CAPACITOR V1R C105 TO OUTDOOR...

  • Page 269: Outdoor Unit

    Wiring Diagrams ESIE12-06 Outdoor Unit 2.2.1 RZQG71L PRINTED CIRCUIT BOARD PRINTED CIRCUIT BOARD TO INDOOR POWER SUPPLY BS1~BS4 PUSH BUTTON SWITCH UNIT ~220-240V 50Hz C1~C3 CAPACITOR X1M L DIP SWITCH FUSE ( T , 6.3A , 250V ) H2P H4P H6P FUSE BLK WHT FUSE ( T , 3.15A , 250V )

  • Page 270: Precautions For New Refrigerant (R-410A)

    ESIE12-06 Precautions for New Refrigerant (R-410A) 3. Precautions for New Refrigerant (R-410A) Outline 3.1.1 About Refrigerant R-410A  Characteristics of new refrigerant, R-410A 1. Performance Almost the same performance as R-22 and R-407C 2. Pressure Working pressure is approx. 1.4 times more than R-22 and R-407C. 3.
  • Page 271 Precautions for New Refrigerant (R-410A) ESIE12-06  Thermodynamic characteristic of R-410A DAIREP ver2.0 Temperature Specific entropy Steam pressure Density Specific heat at constant Specific enthalpy (˚C) (kg/m pressure (kJ/kgK) (kJ/kg) (kJ/KgK) (kPa) Liquid Vapor Liquid Vapor Liquid Vapor Liquid Vapor Liquid Vapor Appendix...

  • Page 272: Refrigerant Cylinders

    ESIE12-06 Precautions for New Refrigerant (R-410A) Refrigerant Cylinders  Cylinder specifications • The cylinder is painted refrigerant color (pink). • The cylinder valve is equipped with a siphon tube. Cylinder Refrigerant can be charged in liquid state with cylinder in upright position.

  • Page 273: Service Tools

    Precautions for New Refrigerant (R-410A) ESIE12-06 Service Tools R-410A is used under higher working pressure, compared to previous refrigerants (R-22, R-407C). Furthermore, the refrigerating machine oil has been changed from Suniso oil to Ether oil, and if oil mixing is occurred, sludge results in the refrigerants and causes other problems.
  • Page 274 ESIE12-06 Precautions for New Refrigerant (R-410A) 1. Flaring tool Flare gauge  Specifications • Dimension A Unit:mm Tube O.D. −0.4 Nominal size Class-2 (R-410A) Class-1 (Conventional) 6.35 9.52 13.2 13.0 12.70 16.6 16.2 15.88 19.7 19.4 19.05 24.0 23.3  Differences •...
  • Page 275 Precautions for New Refrigerant (R-410A) ESIE12-06 2. Torque wrench  Specifications • Dimension B Unit:mm Nominal size Class-1 Class-2 Previous No change in tightening torque No change in pipes of other sizes  Differences • Change of dimension B Only 1/2", 5/8" are extended For class-1: R-407C For class-2: R-410A Dimension B...
  • Page 276 ESIE12-06 Precautions for New Refrigerant (R-410A) 4. Leak tester  Specifications • Hydrogen detecting type, etc. • Applicable refrigerants R-410A, R-407C, R-404A, R-507A, R-134a, etc.  Differences • Previous testers detected chlorine. Since HFCs do not contain chlorine, new tester detects hydrogen.
  • Page 277 Precautions for New Refrigerant (R-410A) ESIE12-06 • Temperature scale indicates the relationship between pressure and temperature in gas saturated state.  Differences • Change in pressure • Change in service port diameter 7. Charge hose for R-410A (Hose with ball valve) ...
  • Page 278 ESIE12-06 Precautions for New Refrigerant (R-410A) 9. Weigher for refrigerant charge  Specifications • High accuracy TA101A (for 10-kg cylinder) = ± 2g TA101B (for 20-kg cylinder) = ± 5g • Equipped with pressure-resistant sight glass to check liquid refrigerant charging. •...
  • Page 279 Precautions for New Refrigerant (R-410A) ESIE12-06 Appendix...

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