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Daikin SkyAir GQI-Eco Series Service Manual

R-410a 50hz.
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SiBE281013
Service
Manual
GQI-Eco Series
Heat Pump R-410A 50Hz
RZQG71~140LV1B

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   Summary of Contents for Daikin SkyAir GQI-Eco Series

  • Page 1

    SiBE281013 Service Manual GQI-Eco Series Heat Pump R-410A 50Hz RZQG71~140LV1B...

  • Page 2: Table Of Contents

    SiBE281013 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. External Appearance................3 Part 2 Functions ................

  • Page 3: Table Of Contents

    SiBE281013 3.2 Outdoor Unit ...................33 Part 6 Field Setting ..............49 1. Test Operation ..................50 1.1 Pre-run Checks ..................50 1.2 Remote Controller Confirmation.............50 1.3 Test Run....................51 1.4 Precautions Regarding Test Run ............51 1.5 Failure Diagnosis at the Moment of First Installation ......52 2.

  • Page 4: Table Of Contents

    SiBE281013 4.7 Capacity Setting Abnormality ...............112 4.8 Transmission Error (between Indoor Unit PCB and Adaptor PCB) ..113 4.9 Thermistor Abnormality ................115 4.10 Humidity Sensor System Abnormality ..........116 4.11 Remote Controller Thermistor Abnormality ..........117 4.12 Outdoor Unit PCB Abnormality.............118 4.13 High Pressure Abnormality (Detected by the High Pressure Switch)...119 4.14 Actuation of Pressure Sensor...............123 4.15 Compressor Motor Lock ...............125 4.16 Outdoor Unit Fan Motor Abnormality............126...

  • Page 5: Safety Cautions

    SiBE281013 Introduction 1. Introduction Safety Cautions Cautions and Be sure to read the following safety cautions before conducting repair work. The caution items are classified into “ Warning” and “ Caution”. The “ Warning” Warnings items are especially important since they can lead to death or serious injury if they are not followed closely.

  • Page 6

    Introduction SiBE281013 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 7

    SiBE281013 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 8

    Introduction SiBE281013 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 9

    SiBE281013 Introduction Caution Be sure to measure the insulation resistance after the repair, and make sure that the resistance is 1 MΩ 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 10

    This is the new service manual for Daikin's Year 2010 RZQG-L series Heat Pump System. Daikin offers a wide range of models to respond to building and office air conditioning needs. We are confident that customers will be able to find the models that best suit their needs.

  • Page 11: General Information

    SiBE281013 Part 1 General Information 1. Model Names of Indoor / Outdoor Units..........2 2. External Appearance................3 General Information...

  • Page 12: Model Names Of Indoor / Outdoor Units

    Model Names of Indoor / Outdoor Units SiBE281013 1. Model Names of Indoor / Outdoor Units Model Series Indoor Unit Outdoor Unit Power Supply FCQG71EVEB RZQG71LV1B FCQG100EVEB RZQG100LV1B Ceiling Mounted Cassette Type FCQG125EVEB RZQG125LV1B FCQG140EVEB RZQG140LV1B 1 phase, 220-240V, 50Hz FHQG71CVEB RZQG71LV1B FHQG100CVEB...

  • Page 13: External Appearance

    SiBE281013 External Appearance 2. External Appearance Indoor Units FCQG-E FHQG-C Wired Remote Controller BRC1D528 BRC1E51A7 Wireless Remote Controller BRC7G63 Outdoor Units RZQG71LV1B RZQG100·125·140LV1B General Information...

  • Page 14: Part 2 Functions

    SiBE281013 Part 2 Functions 1. Functions....................5 1.1 Indoor Unit....................5 1.2 Outdoor Unit .....................5 Functions...

  • Page 15: Functions

    SiBE281013 Functions 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 thermo. sensors Wireless type — Hot start Timer selector Mould Mould resistant treatment for filter...

  • Page 16: Part 3 Specifications

    SiBE281013 Part 3 Specifications 1. Specifications ..................7 Specifications...

  • Page 17: Specifications

    SiBE281013 Specifications 1. Specifications FCQG (Ceiling Mounted Cassette Type - Round Flow -) Indoor unit FCQG71EVEB FCQG100EVEB FCQG125EVEB FCQG140EVEB Model Outdoor unit RZQG71LV1B RZQG100LV1B RZQG125LV1B RZQG140LV1B Power Supply 1 phase, 220-240V, 50Hz 10.0 12.5 14.0 ∗ Cooling capacity Btu/h 24,200 34,100 42,700 47,800...

  • Page 18

    Specifications SiBE281013 FHQG (Ceiling Suspended Type) Indoor unit FHQG71CVEB FHQG100CVEB FHQG125CVEB FHQG140CVEB Model Outdoor unit RZQG71LV1B RZQG100LV1B RZQG125LV1B RZQG140LV1B Power Supply 1 phase, 220-240V, 50Hz 10.0 12.5 14.0 ∗ Cooling capacity Btu/h 24,200 34,100 42,700 47,800 kcal/h 6,100 8,600 10,800 12,000 11.2 14.0...

  • Page 19

    SiBE281013 Part 4 Remote Controller 1. Wired Remote Controller...............10 1.1 Applicable Models ..................10 1.2 Names and Functions ................11 1.3 MAIN/SUB Setting when Using 2 Remote Controllers ......15 1.4 Centralized Control Group No. Setting...........16 2. Wireless Remote Controller ..............18 2.1 Applicable Models ..................18 2.2 Names and Functions ................18 2.3 MAIN/SUB Setting..................20 3.

  • Page 20: Wired Remote Controller

    Wired Remote Controller SiBE281013 1. Wired Remote Controller Applicable Models Model Series FCQG-E FHQG-C BRC1D528 Remote Controller BRC1E51A7 Remote Controller...

  • Page 21: Names And Functions

    SiBE281013 Wired Remote Controller 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. OPERATION LAMP The operation lamp lights up during operation or blinks if an error occurs. 3.

  • Page 22

    Wired Remote Controller SiBE281013 12.MAXIMUM SET TEMPERATURE The maximum set temperature indicates the maximum set temperature when in limit operation. 13.MINIMUM SET TEMPERATURE The minimum set temperature indicates the minimum set temperature when in limit operation. 14.SCHEDULE TIMER ICON This icon indicates that the schedule timer is enabled. 15.ACTION ICONS These icons indicate the actions for each day of the schedule timer.

  • Page 23

    SiBE281013 Wired Remote Controller 1.2.2 BRC1E51A7 1. Operation mode selector button 11. LCD (with backlight) 4. Up button 5. Down button 6. Right button 7. Left button 9. Operation lamp 8. On/Off button 3. Menu/Enter button 10. Cancel button 2. Fan speed control button 1.

  • Page 24

    Wired Remote Controller SiBE281013 8. On/Off button Press this button and system will start. Press this button again and system will stop. 9. Operation lamp (Green) This lamp lights up during operation. This lamp blinks if an error occurs. 10.Cancel button Used to return to the previous screen.

  • Page 25: Main/sub Setting When Using 2 Remote Controllers

    SiBE281013 Wired Remote Controller 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 26: Centralized Control Group No. Setting

    Wired Remote Controller SiBE281013 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 27

    SiBE281013 Wired Remote Controller 1.4.2 BRC1E51A7 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 28: Wireless Remote Controller

    Wireless Remote Controller SiBE281013 2. Wireless Remote Controller Applicable Models Model Series FCQG-E FHQG-C 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) TEST...

  • Page 29

    SiBE281013 Wireless Remote Controller 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 30: Main/sub Setting

    Wireless Remote Controller SiBE281013 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 31: Service Mode

    SiBE281013 Service Mode 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 32

    Service Mode SiBE281013 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 33: Inspection Mode

    SiBE281013 Inspection Mode 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 34: Part 5 Function And Control

    SiBE281013 Part 5 Function and Control 1. Function of Main Components and Thermistors ........25 2. Operation Flow Chart ................27 2.1 Cooling / Dry Operation................27 2.2 Heating Operation ..................28 3. Function Details ..................29 3.1 Indoor Unit....................29 3.2 Outdoor Unit ...................33 Function and Control...

  • Page 35: Function Of Main Components And Thermistors

    SiBE281013 Function of Main Components and Thermistors 1. Function of Main Components and Thermistors RZQG71L 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 36

    Function of Main Components and Thermistors SiBE281013 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 37: Operation Flow Chart, Cooling / Dry Operation

    SiBE281013 Operation Flow Chart 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 38: Heating Operation

    Operation Flow Chart SiBE281013 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 39: Function Details

    SiBE281013 Function Details 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 40

    Function Details SiBE281013 In dry operation ∆T < -2.5ºC Tro > 24ºC Dry operation Thermostat OFF ∆ > -1ºC 24ºC ≥ Tro > 16ºC ∆T < -2ºC Dry operation Thermostat OFF ∆ > -1ºC 16ºC ≥ Tro Tr < 13ºC Dry operation Thermostat OFF Tr >...

  • Page 41: Dew Condensation Prevention Control

    SiBE281013 Function Details 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 42: Defrost Control

    Function Details SiBE281013 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 43: Outdoor Unit

    SiBE281013 Function Details 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 44

    Function Details SiBE281013 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 45

    SiBE281013 Function Details 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) ∆...

  • Page 46

    Function Details SiBE281013 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. ∆ Cooling t cool = Remote controller set temperature - Indoor return air temperature. Depending on ∆...

  • Page 47

    SiBE281013 Function Details 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 48: Low Pressure Protection Control

    Function Details SiBE281013 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 49: High Pressure Protection Control

    SiBE281013 Function Details 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 50

    Function Details SiBE281013 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 51

    SiBE281013 Function Details 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 52

    Function Details SiBE281013 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 53

    SiBE281013 Function Details 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 54

    Function Details SiBE281013 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. Outdoor unit current ≤ upper limit Normal operation current value &...

  • Page 55: Defrost Operation

    SiBE281013 Function Details 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 56: Emergency Operation

    Function Details SiBE281013 Defrost Control Defrosting complete Defrosting start 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 RZQG71LV1B Step 25...

  • Page 57

    SiBE281013 Function Details 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 58

    Function Details SiBE281013 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 59

    SiBE281013 Part 6 Field Setting 1. Test Operation ..................50 1.1 Pre-run Checks ..................50 1.2 Remote Controller Confirmation.............50 1.3 Test Run....................51 1.4 Precautions Regarding Test Run ............51 1.5 Failure Diagnosis at the Moment of First Installation ......52 2. Field Setting from Remote Controller............53 2.1 Wired Remote Controller................53 2.2 Wireless Remote Controller ..............56 2.3 Overview of the Field Setting on the Outdoor Units .......57...

  • Page 60: Test Operation, Pre-run Checks, Remote Controller Confirmation

    Test Operation SiBE281013 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 61: Test Run, Precautions Regarding Test Run

    SiBE281013 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 62: Failure Diagnosis At The Moment Of First Installation

    Test Operation SiBE281013 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 63: Field Setting From Remote Controller

    SiBE281013 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 64

    Field Setting from Remote Controller SiBE281013 2.1.2 BRC1E51A7 <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 65

    SiBE281013 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 66

    Field Setting from Remote Controller SiBE281013 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: “Mode No.”...

  • Page 67: Settings Contents And Code No. For Indoor Units

    SiBE281013 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 68

    Field Setting from Remote Controller SiBE281013 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 69

    SiBE281013 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 70

    Field Setting from Remote Controller SiBE281013 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 71

    SiBE281013 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 72: Overview Of The Field Setting On The Outdoor Units

    Field Setting from Remote Controller SiBE281013 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 73: Quiet (low Noise) Operation

    SiBE281013 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 74

    Field Setting from Remote Controller SiBE281013 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 75: I-demand Function

    SiBE281013 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 Demand 2 →...

  • Page 76: Setting For Low Humidity Application

    Field Setting from Remote Controller SiBE281013 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 77

    SiBE281013 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 78

    Field Setting from Remote Controller SiBE281013 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 79

    SiBE281013 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 80: Defrost Start Setting

    Field Setting from Remote Controller SiBE281013 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 81: Field Setting From Outdoor Unit Pcb, Location Of Dip Switch And Bs Button

    SiBE281013 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 82: Field Setting For Outdoor Unit

    Field Setting from Outdoor Unit PCB SiBE281013 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 83

    SiBE281013 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 84

    Field Setting from Outdoor Unit PCB SiBE281013 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. h: OFF l: BLINK k: ON Operating procedure H1P H2P H3P H4P H5P H6P H7P...

  • Page 85

    SiBE281013 Field Setting from Outdoor Unit PCB 3.2.4 Monitor Mode In this mode, the following items can be checked by using the BS buttons. LED display To enter the monitor mode, press the MODE Setting item Data display (BS1) button when in “Setting mode 1”. H1P H2P H3P H4P H5P H6P H7P Indication of oil return See Data display (1).

  • Page 86

    Field Setting from Outdoor Unit PCB SiBE281013 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 87: Emergency Operation, Forced Operation

    SiBE281013 Emergency Operation 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 88

    Emergency Operation SiBE281013 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 89

    SiBE281013 Part 7 Service Diagnosis 1. Maintenance Inspection ................81 1.1 Overview ....................81 2. Symptom-based Troubleshooting ............83 2.1 Overview ....................83 2.2 Equipment does not Operate ..............84 2.3 Indoor Unit Fan Operates, but Compressor does not Operate ....86 2.4 Cooling / Heating Operation Starts but Stops Immediately ....88 2.5 After Unit Shuts Down, It cannot be Restarted for a While ....89 2.6 Equipment Operates but does not Provide Cooling .......91 2.7 Equipment Operates but does not Provide Heating .......93...

  • Page 90

    SiBE281013 4.26 Transmission System Abnormality (between Control and Inverter PCB) ............145 4.27 Open Phase or Power Supply Voltage Imbalance .......146 4.28 Defective Capacity Setting ..............147 4.29 Refrigerant Shortage (Alert) ..............148 4.30 Refrigerant Shortage (Error)..............149 4.31 Power Supply Voltage Abnormality ............151 4.32 Transmission Error between Indoor and Outdoor Unit......153 4.33 Transmission Error Between Remote Controller and Indoor Unit ..156 4.34 Transmission Error between MAIN Remote Controller and...

  • Page 91: Maintenance Inspection

    SiBE281013 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 92

    Maintenance Inspection SiBE281013 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 93: Symptom-based Troubleshooting

    SiBE281013 Symptom-based Troubleshooting 2. Symptom-based Troubleshooting Overview Symptom Details of Measures Equipment does not operate. Refer to P.84 Indoor fan operates, but compressor does not Refer to P.86 operate. Cooling/heating operation starts but stops Refer to P.88 immediately. After unit shuts down, it cannot be restarted for a Refer to P.89 while.

  • Page 94: Equipment Does Not Operate

    Symptom-based Troubleshooting SiBE281013 Equipment does not Operate Applicable Model All models of SkyAir series Supposed Fuse blown or disorder of contact in operation circuit Defective operation switch or contact point Causes Defective high pressure switch Defective magnetic switch for fan motor Activation or fault of overcurrent relay for fan motor Defective overcurrent relay for compressor Defective compressor protection thermostat...

  • Page 95

    SiBE281013 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 96: Indoor Unit Fan Operates, But Compressor Does Not Operate

    Symptom-based Troubleshooting SiBE281013 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 Defective thermistor Causes Defective indoor/outdoor unit PCB Defective magnetic switch Defective power transistor Defective compressor Service Diagnosis...

  • Page 97

    SiBE281013 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 98: Cooling / Heating Operation Starts But Stops Immediately

    Symptom-based Troubleshooting SiBE281013 Cooling / Heating Operation Starts but Stops Immediately Applicable Model All models of SkyAir series Supposed Overcharge of refrigerant Air mixed in refrigerant system Causes Defective pressure switch Defective magnetic switch for outdoor unit fan motor Defective aux. relay for outdoor unit fan motor Soiled heat exchanger of outdoor unit There is an interfering item in airflow of outdoor unit.

  • Page 99: After Unit Shuts Down, It Cannot Be Restarted For A While

    SiBE281013 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) Overcurrent relay may act due to the following reasons Causes Lower voltage of power supply Excess level of high pressure Insufficient size of power cable Defective compressor...

  • Page 100

    Symptom-based Troubleshooting SiBE281013 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 101: Equipment Operates But Does Not Provide Cooling

    SiBE281013 Symptom-based Troubleshooting Equipment Operates but does not Provide Cooling Applicable Model All models of SkyAir series Supposed Overcurrent relay (for compressor) Overcurrent relay may act due to the following reasons Causes Lower voltage of power supply Excess level of high pressure Insufficient size of power cable Defective compressor Compressor protection thermostat...

  • Page 102

    Symptom-based Troubleshooting SiBE281013 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 103: Equipment Operates But Does Not Provide Heating

    SiBE281013 Symptom-based Troubleshooting Equipment Operates but does not Provide Heating Applicable Model All models of SkyAir series Supposed Overcharge of refrigerant Air mixed in refrigerant system Causes Defective pressure switch Defective magnetic switch for outdoor unit fan motor Defective aux. relay for outdoor unit fan motor Soiled heat exchanger of outdoor unit There is an interfering item in airflow of outdoor unit.

  • Page 104

    Symptom-based Troubleshooting SiBE281013 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 105: Equipment Discharges White Mist

    SiBE281013 Symptom-based Troubleshooting Equipment Discharges White Mist Applicable Model All models of SkyAir series Supposed Humid installation site Installation site is dirty and with dense oil mists. Causes 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. Is the room temperature higher than set Continue the unit operation.

  • Page 106: Equipment Produces Loud Noise Or Vibration

    Symptom-based Troubleshooting SiBE281013 Equipment Produces Loud Noise or Vibration Applicable Model All models of SkyAir series Supposed Defective installation Overcharge of refrigerant Causes 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. [Installation work side] Does the noise generate with vibration...

  • Page 107: Equipment Discharges Dust

    SiBE281013 Symptom-based Troubleshooting 2.10 Equipment Discharges Dust Applicable Model All models of SkyAir series Supposed Carpet Animal hair Causes 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 108: Remote Controller Lcd Displays

    Symptom-based Troubleshooting SiBE281013 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 109: Swing Flap Does Not Operate

    SiBE281013 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 flap motor for a specified amount of time (about 30 seconds). Conditions Remark Some functions can force the swing flap into a fixed position, although swing mode is selected...

  • Page 110

    Symptom-based Troubleshooting SiBE281013 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 111: Troubleshooting By Led Indications, Troubleshooting By Led On The Indoor Unit

    SiBE281013 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) : LED on / h : LED off / l : LED blinks Micro-computer Normal Monitor Contents/Processing...

  • Page 112: Troubleshooting By Remote Controller, Procedure Of Self-diagnosis By Remote Controller

    Troubleshooting by Remote Controller SiBE281013 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 113

    SiBE281013 Troubleshooting by Remote Controller 4.1.2 Wired Remote Controller — BRC1E51A7 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 114

    Troubleshooting by Remote Controller SiBE281013 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 115

    SiBE281013 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 116: Error Codes And Description

    Troubleshooting by Remote Controller SiBE281013 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 117: Safety Devices

    SiBE281013 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 118: Indoor Unit Pcb Abnormality

    Troubleshooting by Remote Controller SiBE281013 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 119: Drain Water Level System Abnormality

    SiBE281013 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 turns OFF.

  • Page 120

    Troubleshooting by Remote Controller SiBE281013 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 121: Indoor Unit Fan Motor Abnormality

    SiBE281013 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 output voltage to the fan is at its maximum.

  • Page 122: Capacity Setting Abnormality

    Troubleshooting by Remote Controller SiBE281013 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 inside the IC memory on the indoor unit PCB, and whether the value is normal or abnormal is Detection determined.

  • Page 123: Transmission Error (between Indoor Unit Pcb And Adaptor Pcb)

    SiBE281013 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) using micro-computer. Detection Error Decision When normal transmission is not conducted for certain duration (15 seconds or more).

  • Page 124

    Troubleshooting by Remote Controller SiBE281013 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 125: Thermistor Abnormality

    SiBE281013 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 Defective connector connection...

  • Page 126: Humidity Sensor System Abnormality

    Troubleshooting by Remote Controller SiBE281013 4.10 Humidity Sensor System Abnormality Remote Controller Display Applicable FCQG Models Method of Error Even if error occurs, operation still continue. The error is detected by humidity (output voltage) detected by humidity sensor. Detection Error Decision The error is generated when the humidity sensor becomes disconnected or shorted when the unit is running.

  • Page 127: Remote Controller Thermistor Abnormality

    SiBE281013 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 air thermistor. Detection The error is detected by temperature of remote controller thermistor.

  • Page 128: Outdoor Unit Pcb Abnormality

    Troubleshooting by Remote Controller SiBE281013 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 Defective outdoor unit PCB (A1P) Defective fan motor...

  • Page 129: High Pressure Abnormality (detected By The High Pressure Switch)

    SiBE281013 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] The error is detected by the outdoor unit intermediate heat exchanger thermistor (R5T). Detection [In heating] The error is detected by the indoor unit intermediate heat exchanger thermistor (R3T).

  • Page 130

    Troubleshooting by Remote Controller SiBE281013 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 131

    SiBE281013 Troubleshooting by Remote Controller 4.13.2 RZQG125, 140 Remote Controller Display Applicable RZQG125, 140 Models Method of Error [In cooling] Detect the continuity of high pressure switch (S1PH) with the protection device circuit. Detection The error is detected by the outdoor unit intermediate heat exchanger thermistor (R5T). [In heating] Detect the continuity of high pressure switch (S1PH) with the protection device circuit.

  • Page 132

    Troubleshooting by Remote Controller SiBE281013 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 133: Actuation Of Pressure Sensor

    SiBE281013 Troubleshooting by Remote Controller 4.14 Actuation of Pressure Sensor Remote Controller Display Applicable RZQG Models Method of Error [In cooling] Detect error by the indoor unit intermediate thermistor (R3T). Detection [In heating] Detect error by the intermediate heat exchanger thermistor (R5T). Error Decision [In cooling] When the detection pressure is the following value...

  • Page 134

    Troubleshooting by Remote Controller SiBE281013 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 135: Compressor Motor Lock

    SiBE281013 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 Compressor lock...

  • Page 136: Outdoor Unit Fan Motor Abnormality

    Troubleshooting by Remote Controller SiBE281013 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 when the fan motor runs. Detection Error Decision When the fan runs with speed less than a specified one for 15 seconds or more when the fan...

  • Page 137

    SiBE281013 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 138: Electronic Expansion Valve Abnormality

    Troubleshooting by Remote Controller SiBE281013 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. The error is detected by the suction pipe superheat degree, discharge pipe superheat Detection degree and electronic expansion valve opening degree.

  • Page 139

    SiBE281013 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 140

    Troubleshooting by Remote Controller SiBE281013 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 141: Discharge Pipe Temperature Control

    SiBE281013 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 sensor. Detection Error Decision When the discharge pipe temperature rises to an abnormally high level When the discharge pipe temperature rises suddenly Conditions When the discharge pipe temperature does not rise after operation start...

  • Page 142

    Troubleshooting by Remote Controller SiBE281013 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 143: High Pressure Switch System Abnormality

    SiBE281013 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 Incomplete high pressure switch...

  • Page 144: Thermistor System Abnormality

    Troubleshooting by Remote Controller SiBE281013 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 145

    SiBE281013 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. Detect error by current sensor value during synchronized operation at the time of startup. Detection Detect error using an MP-PAM series capacitor overvoltage sensor.

  • Page 146

    Troubleshooting by Remote Controller SiBE281013 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 147: Radiation Fin Temperature Rise

    SiBE281013 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 dissipation.

  • Page 148

    Troubleshooting by Remote Controller SiBE281013 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 149: Output Overcurrent Detection

    SiBE281013 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 (DC current sensor). Detection Error Decision When overcurrent has run to power transistor.

  • Page 150

    Troubleshooting by Remote Controller SiBE281013 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 151: Electronic Thermal (time Lag), Electronic Thermal (time Lag)

    SiBE281013 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 current sensor). Detection Error Decision When compressor overload (except for when startup) is detected.

  • Page 152

    Troubleshooting by Remote Controller SiBE281013 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 153: Stall Prevention (time Lag), Stall Prevention (time Lag)

    SiBE281013 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 (DC current sensor). Detection Inverter PCB detects the disorder of position signal. Error Decision When compressor overload and change of load are detected when startup Conditions...

  • Page 154

    Troubleshooting by Remote Controller SiBE281013 Troubleshooting Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred. Check the installation conditions. Open the stop valve. Is the stop valve open? Is the difference between high and low pressure Insufficient pressure before startup not more...

  • Page 155: Inverter Pcb

    SiBE281013 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 Defective outdoor fan motor...

  • Page 156: Open Phase Or Power Supply Voltage Imbalance

    Troubleshooting by Remote Controller SiBE281013 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 inverter. Detection Error Decision When the aforementioned voltage waveform becomes identical with the waveform of the power supply open phase.

  • Page 157: Defective Capacity Setting

    SiBE281013 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 (for spare) is the same as outdoor unit capacity. Detection Error Decision When the set value on E...

  • Page 158: Refrigerant Shortage (alert), Refrigerant Shortage (alert)

    Troubleshooting by Remote Controller SiBE281013 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 and measured temperatures and pressures. Detection 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 159: Refrigerant Shortage (error), Refrigerant Shortage (error)

    SiBE281013 Troubleshooting by Remote Controller 4.30 Refrigerant Shortage (Error) Remote Controller Display Applicable RZQG Models Method of Error (In cooling) Detection based on difference in temperature between temperature set by remote controller and Detection indoor suction air temperature, electronic expansion valve opening degree, compressor frequency and low pressure.

  • Page 160

    Troubleshooting by Remote Controller SiBE281013 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 161: Power Supply Voltage Abnormality

    SiBE281013 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 power supply voltage. Detection Error Decision When the voltage of main circuit capacitor built in the inverter and power supply voltage drop or when the power failure of several tens of ms or more is generated.

  • Page 162

    Troubleshooting by Remote Controller SiBE281013 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 163: Transmission Error Between Indoor And Outdoor Unit

    SiBE281013 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 indoor and the outdoor unit is not normal over a certain amount of time. Detection Error Decision When the transmission is not carried out normally over a certain amount of time.

  • Page 164

    Troubleshooting by Remote Controller SiBE281013 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 165

    SiBE281013 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 166: Transmission Error Between Remote Controller And Indoor Unit

    Troubleshooting by Remote Controller SiBE281013 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 indoor and the outdoor unit is not normal over a certain amount of time.

  • Page 167: Transmission Error Between Main Remote Controller And Sub Remote Controller

    SiBE281013 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 transmission between indoor unit and remote controller (main and sub) is normal.

  • Page 168: Field Setting Switch Abnormality

    Troubleshooting by Remote Controller SiBE281013 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 Defective power supply PCB connection Causes Indoor-outdoor, indoor-indoor unit transmission wiring...

  • Page 169

    SiBE281013 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 170

    Troubleshooting by Remote Controller SiBE281013 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 171: Transmission Error Between Centralized Controller And Indoor Unit, Transmission Error Between Centralized Controller And

    SiBE281013 Troubleshooting by Remote Controller 4.37 Transmission Error Between Centralized Controller and Indoor Unit Remote Controller Display Applicable All models of indoor units Centralized controller Models 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 172

    Troubleshooting by Remote Controller SiBE281013 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 173: Transmission Error Between Indoor And Outdoor Unit Piping And Wiring Mismatch / Refrigerant Shortage

    SiBE281013 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 power turned ON.

  • Page 174

    Troubleshooting by Remote Controller SiBE281013 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 175: Check

    SiBE281013 Troubleshooting by Remote Controller 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’’...

  • Page 176

    Troubleshooting by Remote Controller SiBE281013 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...

  • Page 177

    SiBE281013 Troubleshooting by Remote Controller Outdoor unit RZQG Thermistor Discharge pipe thermistor k Ω k Ω k Ω k Ω k Ω k Ω T°C T°C T°C T°C T°C T°C 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...

  • Page 178

    Troubleshooting by Remote Controller SiBE281013 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 179

    SiBE281013 Troubleshooting by Remote Controller 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 180

    Troubleshooting by Remote Controller SiBE281013 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 181

    SiBE281013 Troubleshooting by Remote Controller 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...

  • Page 182

    Troubleshooting by Remote Controller SiBE281013 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 183

    SiBE281013 Troubleshooting by Remote Controller 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 184

    Troubleshooting by Remote Controller SiBE281013 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 185

    SiBE281013 Troubleshooting by Remote Controller 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.

  • Page 186

    Troubleshooting by Remote Controller SiBE281013 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 187

    SiBE281013 Troubleshooting by Remote Controller <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 188: Part 8 Appendix

    SiBE281013 Part 8 Appendix 1. Piping Diagrams..................179 1.1 RZQG71LV1B ..................179 1.2 RZQG100-140LV1B ................179 2. Wiring Diagrams..................180 2.1 Indoor Unit....................180 2.2 Outdoor Unit ..................181 3. Precautions for New Refrigerant (R-410A) .........182 3.1 Outline ....................182 3.2 Refrigerant Cylinders................184 3.3 Service Tools..................185 Appendix...

  • Page 189: Piping Diagrams

    SiBE281013 Piping Diagrams 1. Piping Diagrams RZQG71LV1B 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 190: Wiring Diagrams

    Wiring Diagrams SiBE281013 2. Wiring Diagrams Indoor Unit 2.1.1 FCQG71-140EVEB 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 191

    SiBE281013 Wiring Diagrams Outdoor Unit 2.2.1 RZQG71LV1B 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 192: Precautions For New Refrigerant (r-410a)

    Precautions for New Refrigerant (R-410A) SiBE281013 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 193

    SiBE281013 Precautions for New Refrigerant (R-410A) 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 194: Refrigerant Cylinders

    Precautions for New Refrigerant (R-410A) SiBE281013 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. Caution: Do not lay cylinder on its side during charging, since it cause refrigerant in gas state to enter the system.

  • Page 195: Service Tools

    SiBE281013 Precautions for New Refrigerant (R-410A) 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 196

    Precautions for New Refrigerant (R-410A) SiBE281013 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 • Change of dimension A Dimension A For class-1: R-407C...

  • Page 197

    SiBE281013 Precautions for New Refrigerant (R-410A) 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 198

    Precautions for New Refrigerant (R-410A) SiBE281013 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. 5.

  • Page 199

    SiBE281013 Precautions for New Refrigerant (R-410A) • 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) Specifications •...

  • Page 200

    Precautions for New Refrigerant (R-410A) SiBE281013 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 201

    Daikin Industries, Ltd.’s products are manufactured for export to numerous countries throughout the Warning world. Daikin Industries, Ltd. does not have control over which products are exported to and used in a particular country. Prior to purchase, please therefore confirm with your local authorised importer, distributor and/or retailer whether this product conforms to the applicable standards, and is suitable for use, in the region where the product will be used.

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