Page 1 SiBE28 - 804 SkyAir RZQ71C7V1B, RZQ100~140C7V1B, RZQS71·100C7V1B, RZQS125·140C7V1B R-410A Heat Pump 50Hz...
Page 2: Table Of Contents
GQI III C Series 50Hz 1. Introduction .................... vi 1.1 Safety Cautions ..................vi 1.2 PREFACE ....................x SkyAir Inverter GQI III Series ............1 Part 1 General Information ............3 1. Combination ....................4 1.1 Combination Overview ................4 1.2 Combination Matrix ..................5 2.
Page 3 SiBE28-804 1.10 4-way Valve Control ................45 1.11 Pump Down Operation ................46 1.12 Defrost Operation ...................47 1.13 Freeze Prevention Function ..............49 1.14 PMV Control ...................50 1.15 Preheating Operation Control..............51 1.16 Crankcase Heater Control..............52 2. Indoor Unit Functional Concept.............53 2.1 Thermostat Control.................53 2.2 Drain Pump Control................54 2.3 Condensation Avoidance Control............55 2.4 Draft Avoidance Control 1 ..............56...
Page 4 SiBE28-804 2.7 The Field Setting Levels.................96 2.8 Overview of the Field Settings on the Outdoor Units ......99 2.9 Overview of the Factory Settings on the Outdoor Units ......99 2.10 Existence of DIP Switch and BS Button ..........100 2.11 Quiet (Low Noise) Operation..............106 2.12 I-Demand Function................108 2.13 Setting for Low Humidity Application............110 2.14 Defrost Start Setting ................115...
Page 5 SiBE28-804 5.14 “C4”, “C9” Thermistor Abnormality ............173 5.15 “C6” Failure of combination (between indoor unit PC board and fan PC board) ......175 5.16 “CJ” Malfunctioning Remote Controller Air Thermistor......176 5.17 “CC” Humidity Sensor System Malfunction ..........177 5.18 “E1” Failure of Outdoor Unit PC Board...........178 5.19 “E3”...
Page 6 SiBE28-804 3.4 Triple System ..................251 3.5 Double Twin System ................252 3.6 Pipe Connection Diameters..............253 3.7 Re-using Existing Field Piping..............254 4. Wiring Diagrams..................260 4.1 Outdoor Unit ..................260 5. Switch Box Layout................262 5.1 RZQ71C7, RZQS71·100C7V1B............262 5.2 RZQ100~140C7, RZQS125·140C7V1B..........263 6. PCB Layout ..................264 6.1 RZQ71C7, RZQS71·100C7V1B............264 6.2 RZQ100~140C7, RZQS125·140C7V1B..........265 Part 8 Removal Procedure ............
Page 7: Introduction
Introduction SiBE28-804 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 8 SiBE28-804 Introduction Caution Do not repair the electrical components with wet hands. Working on the equipment with wet hands can cause an electrical shock. Do not clean the air conditioner by splashing water. Washing the unit with water can cause an electrical shock. Be sure to provide the grounding when repairing the equipment in a humid or wet place, to avoid electrical shocks.
Page 9 Introduction SiBE28-804 Warning Be sure to use the specified cable to connect between the indoor and outdoor units. Make the connections securely and route the cable properly so that there is no force pulling the cable at the connection terminals. Improper connections can cause excessive heat generation or fire.
Page 10 SiBE28-804 Introduction Caution Check to see if the parts and wires are mounted and connected properly, and if the connections at the soldered or crimped terminals are secure. Improper installation and connections can cause excessive heat generation, fire or an electrical shock. If the installation platform or frame has corroded, replace it.
Page 11: Preface
This is the new service manual for Daikin's Year 2008 RZQ(S)-C 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 12: Skyair Inverter Gqi Iii Series
SiBE28-804 SkyAir Inverter GQI III Series Model Series Class FCQH — — — 71C7 100C7 125C7 140C7 35C7 50C7 60C7 71C7 100C7 125C7 140C7 — — — — 100B 125B — Indoor 35BU 50BU 60BU 71BU 100BU 125BU — Unit —...
Page 13 SiBE28-804...
Page 14: Part 1 General Information
SiBE28-804 Part 1 General Information 1. Combination ....................4 1.1 Combination Overview ................4 1.2 Combination Matrix ..................5 2. External Appearance................6 3. Model Name and Power Supply..............7 General Information...
Page 15: Combination
Combination SiBE28-804 1. Combination Combination Overview The table below contains the possible combinations between indoor units and outdoor units of the Sky Air RZQ(S)-series. MODEL NAME RZQ71C7V1B RZQ100C7V1B RZQ125C7V1B RZQ140C7V1B RZQS71C7V1B RZQS100C7V1B RZQS125C7V1B RZQS140C7V1B MODEL NAME RZQ71C7V1B RZQ100C7V1B RZQ125C7V1B RZQ140C7V1B RZQS71C7V1B RZQS100C7V1B RZQS125C7V1B...
Page 16: Combination Matrix
SiBE28-804 Combination Combination Matrix Possible indoor combination Simultaneous operation Outdoor models Twin Triple Double Twin RZQ71C7V1B 35-35 — — RZQS71C7V1B (KHRQ22M20TA7) RZQ100C7V1B 50-50 35-35-35 — RZQS100C7V1B (KHRQ22M20TA7) (KHRQ127H7) RZQ125C7V1B 60-60 50-50-50 35-35-35-35 RZQS125C7V1B (KHRQ22M20TA7) (KHRQ127H7) (3×KHRQ22M20TA7) RZQ140C7V1B 71-71 50-50-50 35-35-35-35 RZQS140C7V1B (KHRQ22M20TA7) (KHRQ127H7)
Page 17: External Appearance
External Appearance SiBE28-804 2. External Appearance Indoor Units FCQ(H) Remote Controller Wireless Type Wired Type BRC1D52 Type BRC7 Type Outdoor Units RZQ71C7V1B RZQS71·100C7V1B RZQ100·125·140C7V1B RZQS125·140C7V1B General Information...
Page 18: Model Name And Power Supply
SiBE28-804 Model Name and Power Supply 3. Model Name and Power Supply Indoor Unit Outdoor Unit Power Supply FCQ35C7V3B FCQ71C7V3B FCQH71C7V3B FFQ35BV1B FBQ35B7V1 RZQ71C7V1B 1 phase 220~240V 50Hz FBQ71B7V3B RZQS71C7V1B 1 phase 220~240V 50Hz FHQ35BUV1B FHQ71BUV1B FUQ71BUV1B FAQ71BUV1B FVQ71BV1B FCQ35C7V3B FCQ50C7V3B FCQ100C7V3B FCQH100C7V3B...
Page 19 Model Name and Power Supply SiBE28-804 General Information...
Page 20: Part 2 Specifications
SiBE28-804 Part 2 Specifications 1. Specifications ..................10 1.1 RZQ71C7, 100C7, 125C7 and 140C7 (Single phase) ......10 1.2 RZQS71C7, 100C7, 125C7 and 140C7 (Single phase)......14 Specifications...
Page 21: Specifications
Specifications SiBE28-804 1. Specifications RZQ71C7, 100C7, 125C7 and 140C7 (Single phase) 1.1.1 Technical Specifications The table below contains the technical specifications. Specification RZQ71C7V1B RZQ100C7V1B RZQ125C7V1B RZQ140C7V1B Colour Ivory white Casing Material Painted galvanized steel plate Packing Height 900 mm 1349 mm Packing Width 980 mm Packing Depth...
Page 22 SiBE28-804 Specifications Specification RZQ71C7V1B RZQ100C7V1B RZQ125C7V1B RZQ140C7V1B Liquid quantity Liquid type Flare connection Liquid diameter (OD) 9.52 mm Gas quantity Gas type Flare connection Gas diameter (OD) 15.9 mm Drain quantity Drain type Hole Piping Drain diameter (OD) 26.0 mm connections Piping length min.
Page 23 Specifications SiBE28-804 1.1.2 Electrical Specifications The table below contains the electrical specifications. Specification RZQ71C7V1B RZQ100C7V1B RZQ125C7V1B RZQ140C7V1B Name Phase Power supply Frequency 50 Hz Voltage 230 V Zmax. List Complies to EN61000-3-11 Current Recommended fuses 20 A 32 A Mininum 198 V 207 V Voltage range...
Page 24 SiBE28-804 Specifications Unit combination Power supply Compressor Indoor unit Outdoor unit Hz-Volts Voltage range TOCA FCQH140C7V3B RZQ140C7V1B 25.4 25.4 23.4 23.4 0.07+0.07 0.3+0.3 0.120 FCQ140C7V3B RZQ140C7V1B 25.0 25.0 23.4 23.4 0.07+0.07 0.3+0.3 0.120 FCQ71C7V3B×2 RZQ140C7V1B 25.0 25.0 23.4 23.4 0.07+0.07 0.3+0.3 0.056×2 0.5×2 FCQ50V7V3B×3...
Page 25: Rzqs71C7, 100C7, 125C7 And 140C7 (Single Phase)
Specifications SiBE28-804 RZQS71C7, 100C7, 125C7 and 140C7 (Single phase) 1.2.1 Technical Specifications The table below contains the technical specifications. Specification RZQS71C7V1B RZQS100C7V1B RZQS125C7V1B RZQS140C7V1B Colour Ivory white Casing Material Painted galvanized steel plate Packing Height 900 mm 1349 mm Packing Width 980 mm Packing Depth 420 mm...
Page 26 SiBE28-804 Specifications Specification RZQS71C7V1B RZQS100C7V1B RZQS125C7V1B RZQS140C7V1B Liquid quantity Liquid type Flare connection Liquid diameter (OD) 9.52 mm Gas quantity Gas type Flare connection Gas diameter (OD) 15.9 mm Drain quantity Drain type Hole Piping Drain diameter (OD) 26.0 mm connections Piping length min.
Page 27 Specifications SiBE28-804 1.2.2 Electrical Specifications The table below contains the electrical specifications. Specification RZQS71C7V1B RZQS100C7V1B RZQS125C7V1B RZQS140C7V1B Name Phase Power supply Frequency 50 Hz Voltage 220-240 V Zmax. List Complies to EN61000-3-11 Current Recommended fuses 20 A 32 A Mininum 198 V 207 V Voltage range...
Page 28 SiBE28-804 Specifications Unit combination Power supply Compressor Indoor unit Outdoor unit Hz-Volts Voltage range TOCA FCQH140C7V3B RZQS140C7V1B 25.4 25.4 23.4 23.4 0.07+0.07 0.3+0.3 0.120 FCQ140C7V3B RZQS140C7V1B 25.0 25.0 23.4 23.4 0.07+0.07 0.3+0.3 0.120 FCQ71C7V3B×2 RZQS140C7V1B 25.0 25.0 23.4 23.4 0.07+0.07 0.3+0.3 0.056×2 0.5×2 FCQ50C7V3B×3 RZQS140C7V1B...
Page 29 Specifications SiBE28-804 Specifications...
Page 30: Part 3 Remote Controller
SiBE28-804 Part 3 Remote Controller Wired Remote Controller...............20 1.1 Features ....................20 1.2 Installation ....................22 Wireless Remote Controller ..............24 2.1 Features ....................24 3. Method of Operating Remote Controller ..........26 3.1 The INSPECTION / TEST Button............26 Maintenance Mode Setting..............27 3.3 Operation of the Remote Controller’s Inspection / Test Operation Button ................29 3.4 Remote Controller Service Mode ............30 Remote Controller...
Page 31: Wired Remote Controller
Wired Remote Controller SiBE28-804 1. Wired Remote Controller Features BRC1D52 Type 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 a malfunction occurs. 3.
Page 32 SiBE28-804 Wired Remote Controller 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 33: Installation
Wired Remote Controller SiBE28-804 Installation Remote Controller...
Page 34 SiBE28-804 Wired Remote Controller Remote Controller...
Page 35: Wireless Remote Controller
Wireless Remote Controller SiBE28-804 2. Wireless Remote Controller Features Names and Function Model Series Name of Option FCQ-C FFQ-B FHQ-BU FAQ71B FAQ100B H / P BRC7F532F BRC7E530W BRC7E63W BRC7E618 BRC7C510W Remote Controller ON OFF DOWN ON OFF TEMP TIME DOWN RESERVE CANCEL TIMER TEST...
Page 36 SiBE28-804 Wireless Remote Controller TIMER RESERVE/CANCEL BUTTON DISPLAY “ ” (SIGNAL TRANSMISSION) This lights up when a signal is being AIR FLOW DIRECTION ADJUST transmitted. BUTTON DISPLAY “ ” “ ” “ ” “ ” OPERATION MODE SELECTOR “ ” (OPERATION MODE) BUTTON This display shows the current OPER- Press this button to select OPERATION...
Page 37: Method Of Operating Remote Controller
Method of Operating Remote Controller SiBE28-804 3. Method of Operating Remote Controller The INSPECTION / TEST Button The following modes can be selected by using the [Inspection/Test Operation] button on the remote control. Depress Inspection/Test Operation button for more than 4 seconds. Indoor unit settings can be made Service data can be obtained.
Page 38: Maintenance Mode Setting
SiBE28-804 Method of Operating Remote Controller Maintenance Mode Setting 3.2.1 Service Data Confirmation Procedure 1, 2, 7 1. Enter the field set mode. Continue to push the inspection / test operation button for a minimum of 4 seconds. 2. Enter the service mode. After having entered the field set mode, continue to push the inspection / test operation button for a minimum of 4 seconds.
Page 39 Method of Operating Remote Controller SiBE28-804 3.2.2 Service Mode Setting Procedure 1, 2, 6 1. Enter the field set mode. Continue to push the inspection / test operation button for a minimum of 4 seconds. 2. Enter the maintenance mode. After having entered the field set mode, continue to push the inspection / test operation button for a minimum of 4 seconds.
Page 40: Operation Of The Remote Controller's Inspection / Test Operation Button
SiBE28-804 Method of Operating Remote Controller Operation of the Remote Controller’s Inspection / Test Operation Button Unit Malfunction code Inspection Normal display (No display) Malfunction code blinks when a malfunction occurs. Inspection/test Push the button. operation Unit 0 7 1... Capacity code Malfunction code F...
Page 41: Remote Controller Service Mode
Method of Operating Remote Controller SiBE28-804 Remote Controller Service Mode How to Enter the The operation of the Inspection/Test Operation button on the remote controller allows the unit to enter the Test Operation mode. Service Mode When the Start/Stop button is pushed after the Test Operation mode is set, test operation starts. ("Test Operation"...
Page 42: Part 4 Functional Description
SiBE28-804 Part 4 Functional Description 1. General Functionality ................33 1.1 Functions of Thermistors................33 1.2 Forced Operating Mode (Emergency Operation) ........35 1.3 Outdoor Unit Identification Function ............37 1.4 Simulated Operation Function..............38 1.5 Restart Standby..................39 1.6 Automatic Restart...................40 1.7 Using Conditions for Remote Controller Thermostat......41 1.8 Forced Thermostat OFF.................43 1.9 Test Run Control ..................44 1.10 4-way Valve Control ................45...
Page 43 SiBE28-804 6. Outdoor Unit Fan Speed Control............81 6.1 Outdoor Unit Fan Speed Control............81 Functional Description...
Page 44: General Functionality
SiBE28-804 General Functionality 1. General Functionality Functions of Thermistors Locating the RZQ71C7, RZQS71·100C7V1B (Single phase) thermistors RZQ100~140C7, RZQS125·140C7V1B (Single phase) Note: Sensor R3T on indoor coil of FCQ35~60, FFQ35~60, FBQ35~60 & FHQ35~60 is not used when the indoor units are connected to RZQ outdoor units. Functional Description...
Page 45 General Functionality SiBE28-804 Functions of the thermistors Wiring Thermistor Location Mode Function symbol Indoor Cooling Compressor frequency control (target Te) heat Inverter current protection control exchanger Freeze-up control Heating Compressor frequency control (target Tc) Inverter current protection control Hot start control Peak cut-off Indoor air Cooling...
Page 46: Forced Operating Mode (Emergency Operation)
SiBE28-804 General Functionality Forced Operating Mode (Emergency Operation) Purpose The table below describes the purpose of the forced operating mode. If... Then... R/C is defective Forced operating mode can be used to go to cooling or heating. In Indoor PC board is forced operating mode, the compressor is forced to operate until the defective defective indoor or outdoor PC board is back online.
Page 47 General Functionality SiBE28-804 Step Action Set the emergency switch on the outdoor PCB to the forced mode you prefer (Cooling or Heating). EMERGENCY COOL HEAT Turn ON the power supply. Active components Component Forced cooling Forced heating Forced defrosting Compressor 4-way valve Outdoor unit fan H fan speed...
Page 48: Outdoor Unit Identification Function
SiBE28-804 General Functionality Outdoor Unit Identification Function Purpose The purpose of the outdoor unit identification function is to enable the indoor unit to automatically determine which operating mode has to be set in function of the type of connected outdoor unit (C/O or H/P). Operating modes The possible operating modes are: Outdoor unit...
Page 49: Simulated Operation Function
General Functionality SiBE28-804 Simulated Operation Function RZQ71C7, RZQS71·100C7 When a malfunction on one of the below thermistors occurs, operation will continue while displaying the applicable alarm on the remote-controller. Fin thermistor malfunction is only displayed when pressing the "Inspection" button on the remote controller. ·...
Page 50: Restart Standby
SiBE28-804 General Functionality Restart Standby To prevent compressor from frequent ON/OFF and equalize pressure in refrigerant line, conducts forced thermostat OFF for 3 minutes after compressor stopping. Moreover, outdoor unit fan conducts residual operation for a period of time to expedite equalization and prevent refrigerant from entering in evaporator.
Page 51: Automatic Restart
General Functionality SiBE28-804 Automatic Restart Purpose The purpose of the auto-restart function is to automatically resume the same operating mode as when the unit was operating when the power supply is restored after a power failure. Do not use the "Automatic Restart" function to daily start/stop the unit. Precautions When you have to turn OFF the power supply in order to carry out maintenance, make sure to turn the remote control's ON/OFF switch OFF firstly.
Page 52: Using Conditions For Remote Controller Thermostat
SiBE28-804 General Functionality Using Conditions for Remote Controller Thermostat Applicable The remote control thermostat is only available in wired remote controls. Method The remote control sensor is standard disabled for sky-air units. The use of the remote control sensor can be enabled by changing field setting 10(20)-2-02 to 10(20)-2-01. Conditions The table below contains the condition in which the remote control thermostat is not used: Condition...
Page 53 General Functionality SiBE28-804 Heating The diagram below shows the operation range of the set temperature / air suction temperature combination in heating operation: Preset temperature (Ts) TH1 = Ts – 1 TH1 = Ts + 1 ≤ 31˚C TH1 = Ts + 12 ≤ 33˚C TH1 = Ts + 10 ≤...
Page 54: Forced Thermostat Off
SiBE28-804 General Functionality Forced Thermostat OFF The unit will perform the forced thermostat off function in following conditions: Condition 1 (cooling) Thermostat off due to freeze-up prevention. Based on the judgment to prevent the indoor heat exchanger from freezing, the thermostat is forcedly turned OFF.
Page 55: Test Run Control
General Functionality SiBE28-804 Test Run Control Purpose When operating the RZQ(S) units for the first time after installation, the unit will - depending on the selected operation mode - perform a test run operation first. Situation 1 Cooling - first operation after installation in "Cooling mode" Cooling thermostat ON Cooling operation in Normal cooling...
Page 56: 4-Way Valve Control
SiBE28-804 General Functionality 1.10 4-way Valve Control Purpose The purpose of the 4-way valve control is to control how the superheated refrigerant passes through the 4-way valve. The 4-way valve control carries out the changeover switching of the 4- way valve. This changeover switching is only carried out during operation, because a certain pressure difference is required to move the internal cylinder.
Page 57: Pump Down Operation
General Functionality SiBE28-804 1.11 Pump Down Operation Outline Whenever the units need to be moved or removed, perform a pump-down operation before disconnecting the field piping. By performing a pump-down operation, all of the refrigerant will be collected in the outdoor unit. Procedure Procedure Precautions...
Page 58: Defrost Operation
SiBE28-804 General Functionality 1.12 Defrost Operation Outline When the unit is operating in heating mode, a defrost operation will be conducted in order to avoid ice formation on the outdoor unit heat exchanger. Defrost starting Defrost will start when the following conditions have been realized: conditions •...
Page 59 General Functionality SiBE28-804 Defrost control RZQ71~140C7, RZQS71~140C7V1B Defrosting complete Defrosting start previous control 155Hz Compressor 4-way value A pls Electronic (wet protection control) expansion valve 0 pls (5~60 sec.) 0 pls (5 sec.) Outdoor unit fan Indoor unit fan A pls RZQ71C7, RZQS71·100C7 480 pls RZQ100~140C7, RZQ125·140C7...
Page 60: Freeze Prevention Function
SiBE28-804 General Functionality 1.13 Freeze Prevention Function Purpose In order to avoid formation of ice on the indoor unit heat exchanger in cooling and dry mode, the system automatically starts up a freeze prevention cycle when a number of specific conditions are fulfilled.
Page 61: Pmv Control
General Functionality SiBE28-804 1.14 PMV Control Outline When the automatic mode is selected on the remote-controller, the unit will automatically activate the PMV control. The PMV index is a calculated average comfort level. Refer to ISO 7730 for details. Function An optimized indoor temperature will be calculated using the following inputs: Outdoor air temperature Indoor air temperature...
Page 62: Preheating Operation Control
SiBE28-804 General Functionality 1.15 Preheating Operation Control RZQ71C7, RZQS71·100C7V1B Outline After the compressor has been turned off, the preheating operation will be activated in order to avoid refrigerant from dissolving in the compressor oil. Trigger conditions Starting conditions • Compressor stopping •...
Page 63: Crankcase Heater Control
General Functionality SiBE28-804 1.16 Crankcase Heater Control RZQ100~140C7, RZQS125·140C7V1B Outline After the compressor has been turned off, the crankcase heater control will be activated in order to avoid refrigerant from dissolving in the compressor oil. Trigger conditions 70°C 75°C Discharge pipe temperature Functional Description...
Page 64: Indoor Unit Functional Concept
SiBE28-804 Indoor Unit Functional Concept 2. Indoor Unit Functional Concept Thermostat Control According to a difference between the temperature set by the remote controller and the actually detected room temperature (*1), the thermostat is turned ON or OFF. In normal operation In cooling ·...
Page 65: Drain Pump Control
Indoor Unit Functional Concept SiBE28-804 Drain Pump Control 2.2.1 Cooling Operation, Dry Operation Normally drain pump ON (Thermostat ON/OFF) Excluding FCQ · Cooling or Dry Operation & · Thermostat ON Drain pump OFF Drain pump ON Excluding the below-mentioned (*1) *1: When changing over from ON to OFF, the residual operation is done for 5 minutes.
Page 66: Condensation Avoidance Control
SiBE28-804 Indoor Unit Functional Concept Condensation Avoidance Control FHQ71~125, FAQ71·100 In cooling and dry operation, the following control is carried out in order to prevent dew condensation when the horizontal blade blows air downward. [Start condition] • Horizontal blade is set to downward flow &...
Page 67: Draft Avoidance Control 1
Indoor Unit Functional Concept SiBE28-804 Draft Avoidance Control 1 Purpose Avoid draft for the customer by delaying transfer of the flap to the Po0 (horizontal) position for a certain amount of time when defrosting and in heating thermostat OFF. Heating The time chart below illustrates the draft avoidance control 1 in heating thermostat OFF.
Page 68: Draft Avoidance Control 2
SiBE28-804 Indoor Unit Functional Concept Draft Avoidance Control 2 Purpose The purpose of the draft avoidance control 2 is to avoid draft when the flap is moving. Starting The draft avoidance control 2 is activated when: Hot start is finished, or conditions Cold air prevention control is finished.
Page 69: Fan And Flap Operation
Indoor Unit Functional Concept SiBE28-804 Fan and Flap Operation Cooling The table below contains the fan and flap operations. operation Function In… Flap (FCQ(H) Flap (FAQ) Flap (FVQ) Remote and FHQ) control indication Thermostat ON Swing operation Swing Swing Swing Swing in Dry Keep Airflow direction setting...
Page 70: Indoor Unit Fan Control
SiBE28-804 Indoor Unit Functional Concept Indoor Unit Fan Control Outline During compressor start and stop control, the indoor fan will receive instruction from the outdoor unit in order to protect the compressor from receiving liquid and to assure a smooth compressor start up: Indoor fan control during compressor stop Indoor fan control before compressor startup...
Page 71 Indoor Unit Functional Concept SiBE28-804 At compressor In heating: Hot startup control when performing a startup, or after the defrosting cycle has been completed, the indoor fan will be controlled as to prevent cold air draft and secure the startup starting performance (quick pressure build-up).
Page 72: Outdoor Unit Functional Concept
SiBE28-804 Outdoor Unit Functional Concept 3. Outdoor Unit Functional Concept Function Outline in Cooling Mode Flow chart Cooling/Dry operation Power supply ON Initialize motorized valve Initialize microcomputer Crank case heater control *1 Turn on the power to crankcase heater *1 Preheating operation control Remote controller operation judgement...
Page 73: Function Outline In Heating Mode
Outdoor Unit Functional Concept SiBE28-804 Function Outline in Heating Mode Flow chart Heating operation Power supply ON Initialize motorized valve Initialize microcomputer Crank case heater control *1 Turn on the power to crankcase heater *1 Preheating operation control Remote controller ON operation judgement Cooling/Dry Emergency...
Page 74: Frequency Regulating Functions
SiBE28-804 Frequency Regulating Functions 4. Frequency Regulating Functions Starting Frequency Control Outline The inverter compressor will start up with a limited fixed frequency value for a specified period of time in order to prevent liquid back to the compressor, and to limit the starting current. General The normal starting control time is 2~3 minutes.
Page 75: Starting Control
Frequency Regulating Functions SiBE28-804 Starting Control Starting control When compressor start up, the starting frequency is fixed for specified period of time at low frequency to prevent returning of refrigerant. RZQ71~140C7, RZQS71~140C7 Pressure Starting Pressure control equalizing equalizing complete complete start Pressure equalizing control before...
Page 76: General Frequency Control
SiBE28-804 Frequency Regulating Functions General Frequency Control Outline After the "Starting frequency control" function has been terminated, the ideal compressor frequency will be determined by the "General frequency control". General The compressor operation frequency is controlled in order to keep a constant evaporation temperature in cooling and a constant condensing temperature in heating.
Page 77 Frequency Regulating Functions SiBE28-804 Frequency steps The operating frequency for the sky-air RZQ(S) inverter units will be a value chosen from a list with fixed frequency settings that is programmed in the unit's memory: Compressor operation frequency Step No. RZQ71C7, RZQ100~140C7 RZQS71·100C7 RZQS125·140C7...
Page 78: Low Pressure Protection Control
SiBE28-804 Frequency Regulating Functions Low Pressure Protection Control In order to prevent abnormal low pressures in the system, the below control function will be activated. Low pressure is detected by the low pressure sensor. RZQ71C7, RZQS71·100C7V1B (When cooling operation) (When heating operation) Normal operation Normal operation •...
Page 79 Frequency Regulating Functions SiBE28-804 RZQ100~140C7V1B (When cooling operation) (When heating operation) • Within 10 minutes after defrosting & • Lp < 0.1 MPa continuous for 5 minutes • Lp < 0.05 MPa Normal operation Normal operation • Within 5 minutes after Lp >...
Page 80: High Pressure Protection Control
SiBE28-804 Frequency Regulating Functions High Pressure Protection Control Outline 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. Details The high pressure value will be calculated from the low pressure, power input and compressor frequency.
Page 81: Discharge Pipe Temperature Control
Frequency Regulating Functions SiBE28-804 Discharge Pipe Temperature Control Outline The compressor operating frequency will be controlled in order to avoid abnormal high compressor temperatures (see also expansion valve control). Flow chart Normal operation • Td < A°C • Upper limit frequency Td >...
Page 82: Suction Pipe Superheat Protection Control (Heating Mode)
SiBE28-804 Frequency Regulating Functions Suction Pipe Superheat Protection Control (Heating Mode) Outline 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 decreased.
Page 83: Inverter Current Protection Control
Frequency Regulating Functions SiBE28-804 Inverter Current Protection Control 4.8.1 Control by inverter fin temperature Restricts compressor operation upper limit frequency to prevent compressor from tripping due to inverter fin temperature. Inverter fin temperature ≥ A˚C Normal operation Compressor frequency –1 step/6 sec Compressor frequency +1 step/2 min Fin temperature ≤...
Page 84: Protection Control By Overall Current
SiBE28-804 Frequency Regulating Functions 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 85: Inverter Cooling Fin Temperature Control
Frequency Regulating Functions SiBE28-804 4.10 Inverter Cooling Fin Temperature Control Outline This control will restrict the compressor upper limit frequency in order to protect the electronic components in the switch box from overheating (L4-error activation). By lowering the compressor frequency, the current drawn by the compressor will be reduced and as a result the temperature inside the switch box will drop.
Page 86: Pressure Difference Control
SiBE28-804 Frequency Regulating Functions 4.11 Pressure Difference Control Outline To ensure the compression ratio (pressure difference between high and low pressure) at low outdoor temperature conditions in cooling mode and high outdoor temperature conditions in heating mode, the outdoor fan and target compressor frequency may be varied. Cooling In cooling low ambient conditions, the outdoor fan speed and compressor frequency will be adapted to secure the differential pressure between high and low pressure.
Page 87 Frequency Regulating Functions SiBE28-804 Frequency RZQ71C7, RZQS71·100C7V1B restriction in cooling Normal control Used indoor unit 163.5Hz 222Hz Wall mounted indoor Upper limit Other than wall mounted frequency 232.5Hz 265.5Hz indoor Lower limit 57Hz 57Hz — frequency ≤ ≥ 20°C 21°C Upper limit 232.5Hz 265.5Hz...
Page 88: Oil Recovery Operation
SiBE28-804 Frequency Regulating Functions Heating High outdoor ambient (overload conditions): In heating overload conditions, the outdoor fan speed will be adapted to secure the differential pressure between high and low pressure. RZQ100~140C7, RZQS125·140C7V1B •Hp-Lp > 0.69MPa •HP < 3.24 MPa •&...
Page 89: Expansion Valve Regulating Functions
Expansion Valve Regulating Functions SiBE28-804 5. Expansion Valve Regulating Functions Expansion Valve Control at Startup Outline Before going to the general expansion valve control, the expansion valve opening will be limited in order to avoid the risk of liquid back and allow quick build up of pressure difference. Details During startup, the opening degree is determined by both the compressor frequency &...
Page 90: General Expansion Valve Control
SiBE28-804 Expansion Valve Regulating Functions General Expansion Valve Control Outline After the start up control function has been terminated the general expansion valve control function will regulate the expansion valve opening in function of the target suction SH value. The discharge SH value will be used to set the target SH value. The measured suction SH value will be used to control the opening of the expansion to the target SH value.
Page 91: Discharge Pipe Temperature Protection Control
Expansion Valve Regulating Functions SiBE28-804 Discharge Pipe Temperature Protection Control Outline The expansion valve opening will be controlled in order to avoid abnormal high compressor discharge temperatures (see also compressor operating frequency control). Details RZQ71~140C7, RZQS71~140C7V1B Normal control Td>95˚C Td<80˚C Td<90˚C Electronic expansion valve opening Electronic expansion valve opening...
Page 92: Outdoor Unit Fan Speed Control
SiBE28-804 Outdoor Unit Fan Speed Control 6. Outdoor Unit Fan Speed Control Outdoor Unit Fan Speed Control Fan speed The outdoor fan speed will be controlled in function of the actual outdoor ambient temperature, the condensation pressure, pressure difference between low and high pressure and control compression ratio.
Page 93 Outdoor Unit Fan Speed Control SiBE28-804 Functional Description...
Page 94: Part 5 Test Operation
SiBE28-804 Part 5 Test Operation 1. Test Operation ..................84 1.1 Test Run Checks..................84 1.2 Setting the Wireless Remote Controller ..........85 2. Field Settings ..................89 2.1 How to Change the Field Settings with the Wired Remote Controller..............89 2.2 How to Change the Field Settings with the Wireless Remote Controller .............91 2.3 Overview of the Field Settings on the Indoor Units ........92 2.4 Overview of the Factory Settings on the Indoor Units ......93...
Page 95: Test Operation
Test Operation SiBE28-804 1. Test Operation Test Run Checks 1.1.1 Checks before Test Run Before carrying out a test run, proceed as follows: Step Action Make sure the voltage at the primary side of the safety breaker is: 230 V ± 10% for 1-phase units 400 V ±...
Page 96: Setting The Wireless Remote Controller
SiBE28-804 Test Operation Setting the Wireless Remote Controller 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 The address for the receiver of the wireless remote controller is factory set to 1. To change this address for the setting, proceed as follows: receiver...
Page 97 Test Operation SiBE28-804 Setting the The address for the wireless remote controller is factory set to 1. To change this setting, proceed as follows: address for the wireless remote Step Action controller Hold down the FILTER RESET button and the TEST button for at least 4 s, to go to field set mode.
Page 98 SiBE28-804 Test Operation Step Action Press the UP and DOWN buttons to set the address. Set the same address as the receiver (1, 2 or 3). The receiver does not work with addresses 4, 5 and 6. DOWN Press the RESERVE button to confirm the setting. RESERVE Test Operation...
Page 99 Test Operation SiBE28-804 Step Action Press the TEST button to quit the field set mode and return to the normal display. ON / OFF TEMP TIME ˚C DOWN RESERVE CANCEL TIMER MODE SWING /TEST TEST Multiple settings When an outside control (central remote controller...) controls an indoor unit, sometimes the indoor unit does not respond to ON/OFF and temperature settings commands from this controller.
Page 100: Field Settings
SiBE28-804 Field Settings 2. Field Settings How to Change the Field Settings with the Wired Remote Controller Installation The field settings have to be changed with the remote controller according to the installation conditions. conditions Wired remote The illustration below shows the wired remote controller. controller 23 7 (BRC1D527)
Page 101 Field Settings SiBE28-804 Setting To set the field settings, you have to change: “Mode No.” “First code No.” “Second code No.”. To change the field settings, proceed as follows: Step Action Hold down the INSPECTION/TEST button for at least 4 s during normal mode to enter the “Field setting mode”.
Page 102: How To Change The Field Settings With The Wireless Remote Controller
SiBE28-804 Field Settings How to Change the Field Settings with the Wireless Remote Controller Optional If optional accessories are mounted on the indoor unit, the indoor unit setting may have to be changed. accessories Refer to OH08-1 or the installation manual (optional handbook) for each optional accessory. Wireless remote The illustration below shows the wireless remote controller.
Page 103: Overview Of The Field Settings On The Indoor Units
Field Settings SiBE28-804 Overview of the Field Settings on the Indoor Units Field settings The table below contains the possible field settings of all indoor units. Second code No. Mode First Description of the setting code No. 10 (20) Filter counter Light heavy —...
Page 104: Overview Of The Factory Settings On The Indoor Units
SiBE28-804 Field Settings Overview of the Factory Settings on the Indoor Units Factory settings The table below contains the factory settings of all indoor units Mode First Second code No. code No. FCQ(H) 10 (20) — — 11 (21) — —...
Page 105: Main/Sub Setting When Using Two Remote Controllers
Field Settings SiBE28-804 MAIN/SUB Setting when Using Two Remote Controllers Situation The MAIN/SUB setting is necessary when one indoor unit is controlled by two remote controllers. When you use two remote controllers (control panel and separate remote controller), set one to MAIN and the other to SUB. You can do this by setting the switch on the remote controller’s PCB.
Page 106: Setting The Centralized Group No
SiBE28-804 Field Settings Setting the Centralized Group No. When? If you want to carry out centralized control with a central remote controller and a unified ON/OFF controller, you have to set the group No. for each group with the remote controller. Wired remote The illustration below shows the wired remote controller.
Page 107: The Field Setting Levels
Field Settings SiBE28-804 The Field Setting Levels Introduction The three field setting levels are: Inspection level Monitoring level Maintenance mode settings. The inspection The inspection level is the highest level of the three field setting levels. You can change the views in the inspection level by pressing the INSPECTION/TEST button.
Page 108 SiBE28-804 Field Settings Possible system The table below contains the possible system settings, which are displayed on the remote controller if the TEST button is pushed twice shortly. settings Size Type Settings Display Settings Display FCQ-C – – Changing the To enter the monitoring level and to change the maintenance mode settings, proceed as follows: mode settings...
Page 109 Field Settings SiBE28-804 Maintenance The table below describes the maintenance mode settings. Mode Settings Example of the remote Mode No. Function Content and operation method controller display Display malfunction history Past error code Unit No. History error The history No. can be changed CODE codes SETTING...
Page 110: Overview Of The Field Settings On The Outdoor Units
SiBE28-804 Field Settings Overview of the Field Settings on the Outdoor Units Remote The table below contains the remote controller settings. controller settings Mode N° First Description Second n° Details code 16 (26) Night time low Disabled Automatic Capacity Automatic —...
Page 111: Existence Of Dip Switch And Bs Button
Field Settings SiBE28-804 2.10 Existence of DIP Switch and BS Button 2.10.1 RZQ71~140C7V1B, RZQS71~140C7V1B Various settings are available by using the DIP switches and the BS buttons on the Printed- Circuit Board (Display PC board: A2P). Display Lamp Display PC board (A2P) MODE TEST...
Page 112 SiBE28-804 Field Settings Setting by BS buttons With "Setting mode 1," "Setting mode 2" and "Monitor mode," various settings and data can be checked. Setting mode 1 The initial status (normal operation) is "Setting mode 1." This mode indicates operating status - "TEST (test operation),"...
Page 113 Field Settings SiBE28-804 b. “Setting mode 2” In this mode, settings for the following items can be made by using BS buttons. Push and hold the MODE (BS1) button for 5 seconds and set to “Setting mode <Selection of setting conditions> 2”.
Page 114 SiBE28-804 Field Settings Setting of refrigerant recovery mode When a refrigerant recovery unit is connected on site to recover refrigerant, fully open the expansion valve of the outdoor unit to help the recovery. [Work procedure] (1) Stop operation. (2) Turn ON refrigerant recovery mode by performing the following steps. 1: OFF 9: BLINK 8: ON Operating procedure H1P H2P H3P H4P H5P H6P H7P...
Page 115 Field Settings SiBE28-804 c. “Monitor mode” In this mode, the following items can be checked by using the BS buttons. LED display To enter the monitor mode, push the MODE Setting item Data display (BS1) button when in “Setting mode 1”. H1P H2P H3P H4P H5P H6P H7P Indication of oil return operation See Data display .
Page 116 SiBE28-804 Field Settings d. “List of contents of retry and malfunction” Take the following steps to check contents of retry and malfunction. To enter "Monitor mode," push the MODE (BS1) <Display of RETURN 2> button when in "Setting mode 1." When SET (BS2) button is pushed, the LED display for RETURN 2 turns ON.
Page 117: Quiet (Low Noise) Operation
Field Settings SiBE28-804 2.11 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 PC board KRP58M) 2.11.1 Quiet (Low Noise) Operation by Automatic Control Table Silent operation can be set by field setting from the wired remote controller:...
Page 118 SiBE28-804 Field Settings 2.11.2 External Activation from Optional PC board Graph Quiet (low noise) operation can also be activated from the optional PC board. Transmission connector (on outdoor PC board X6A) Power supply connector (on outdoor PCB X77A) 1 2 3 4 X800M X801M 1 LNOP COM...
Page 119: I-Demand Function
Field Settings SiBE28-804 2.12 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 120 SiBE28-804 Field Settings Demand 1 Power consumption limitation in function of setting on DS1: DS1 SETTING Maximum Power Consumption 100% Demand 2 Power consumption limitation set to 40%. Demand 3 Forced thermostat OFF. Test Operation...
Page 121: Setting For Low Humidity Application
Field Settings SiBE28-804 2.13 Setting for Low Humidity Application Purpose Can be set when using the RZQ units for year round cooling in low humidity applications such as computerrooms (EDP rooms), technical rooms, etc...to increase the capacity of the unit. Definition of Low Humidity Area Relative...
Page 122 SiBE28-804 Field Settings Function details Factory setting Low humidity application Low humidity application + setting freeze up operation prevention Field Setting 16(26)-2-01 16(26)-2-03 16(26)-2-04 Compressor control The compressor frequency is controlled in function of the target evaporating temperature. The target evaporating temperature is controlled in function of the cooling load. Minimum target Te = 2°C Minimum target Te = 0°C Initial minimum target Te =...
Page 123 Field Settings SiBE28-804 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 limitted ≤ 20˚C (to protect the comp.) Te target limitted ≤ Indoor temp. – 11˚ (not to rising wetbulb) Te (see note) target acceptable area...
Page 124 SiBE28-804 Field Settings 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 limitted ≤ 20˚C (˚C) (to protect the comp.) Te (see note) target acceptable area Indoor temp.
Page 125 Field Settings SiBE28-804 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 limitted ≤ 20˚C (to protect the comp.) Te (see note) target acceptable area Indoor temp.
Page 126: Defrost Start Setting
SiBE28-804 Field Settings 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 0.62 0.81 0.91...
Page 127: Test Run And Operation Data
Test Run and Operation Data SiBE28-804 3. Test Run and Operation Data General Operation Data Guide Lines for The operation value guide lines when operating under standard conditions (at Rated frequency) by pushing the test run button on the remote controller are as given in the table Optimal below.
Page 128 SiBE28-804 Test Run and Operation Data Standard Conditions Indoor Unit Conditions Outdoor Unit Conditions Cooling Operation 27°C DB/19°C WB 35°C DB Heating Operation 20°C DB 7°C DB/6°C WB During or after maintenance, when the power supply is turned back on, operation restarts automatically by the “auto restart function.”...
Page 129 Test Run and Operation Data SiBE28-804 Correlation of Air- What happens in comparison to normal values is summarized in the table below. (Measured from 15 ~ 20 minutes or more after operation starts.) Conditioner’s Operation Status and Pressure / When Cooling Running Current Air-Conditioner Status Low Pressure...
Page 130: Operation Range
SiBE28-804 Test Run and Operation Data Operation Range Conditions The illustrations in this section are based on the following conditions: Equivalent piping length: 7.5 m Level difference: 0 m Air flow rate: High. Operation range: The illustration below shows the operation range. Cooling RZQ Series RZQS Series...
Page 131 Test Run and Operation Data SiBE28-804 Test Operation...
Page 132: Part 6 Troubleshooting
SiBE28-804 Part 6 Troubleshooting 1. How to Handle Request for Maintenance ...........123 1.1 General Troubleshooting Flowchart .............123 2. Troubleshooting Based on Equipment Condition........124 2.1 Overview of General Problems ............124 2.2 Equipment does not Operate ...............125 2.3 Indoor Fan Operates, but Compressor does not........127 2.4 Cooling/Heating Operation Starts but Stops Immediately ....129 2.5 After Unit Shuts Down, It cannot be Restarted for a While ....131 2.6 Equipment Operates but does not Provide Cooling ......133...
Page 133 SiBE28-804 5.20 “E4” Actuation of Low Pressure Sensor: Single phase C Series...181 5.21 “E5” Compressor Motor Lock ..............183 5.22 “E7” Malfunction of Outdoor Unit Fan Motor..........185 5.23 “E9” Malfunction of Electronic Expansion Valve........188 5.24 “F3” Malfunctioning in Discharge Pipe Temperature ......191 5.25 “H3”...
Page 134: How To Handle Request For Maintenance
SiBE28-804 How to Handle Request for Maintenance 1. How to Handle Request for Maintenance General Troubleshooting Flowchart Find out the situation according to the following procedure when there is a request for service from the customer. Troubleshooting by remote Turn the power supply Refer to "Remote controller display Wait until controller malfunction...
Page 135: Troubleshooting Based On Equipment Condition
Troubleshooting Based on Equipment Condition SiBE28-804 2. Troubleshooting Based on Equipment Condition Overview of General Problems Overview Equipment Condition Remedy Equipment does not operate. See page 125 Fan operates, but compressor does not. See page 127 Cooling/heating operation starts but stops See page 129 immediately.
Page 136: Equipment Does Not Operate
SiBE28-804 Troubleshooting Based on Equipment Condition Equipment does not Operate Applicable Model All models of SkyAir series Error Detection Method Error Generating Condition Supposed Fuse blown or disorder of contact in operation circuit Faulty operation switch or contact point Causes...
Page 137 Troubleshooting Based on Equipment Condition SiBE28-804 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. power switch OFF or Turn on power switch or replace fuse for power switch fuse.
Page 138: Indoor Fan Operates, But Compressor Does Not
SiBE28-804 Troubleshooting Based on Equipment Condition Indoor Fan Operates, but Compressor does not Applicable Model All models of SkyAir series Method of Malfunction Detection Malfunction Decision Conditions Supposed Faulty thermistor Faulty indoor/outdoor unit PC board Causes Faulty magnetic switch Faulty power transistor...
Page 139 Troubleshooting Based on Equipment Condition SiBE28-804 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. · Indoor unit fan runs at set airflow rate. · (In cooling operation) When air thermistor ambient temperature is higher than set temperature ·...
Page 140: Cooling/Heating Operation Starts But Stops Immediately
SiBE28-804 Troubleshooting Based on Equipment Condition Cooling/Heating Operation Starts but Stops Immediately Applicable Model All models of SkyAir series Error Detection Method Error Generating Condition Supposed Excess charge of refrigerant Air intrudes into refrigerant system Causes Faulty pressure switch Faulty magnetic switch for outdoor unit fan motor Faulty aux.
Page 141 Troubleshooting Based on Equipment Condition SiBE28-804 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is the Is the operation wired type of remote controller Diagnose based on the lamp of remote controller wired or wireless? error code on remote...
Page 142: After Unit Shuts Down, It Cannot Be Restarted For A While
SiBE28-804 Troubleshooting Based on Equipment Condition After Unit Shuts Down, It cannot be Restarted for a While Applicable Model All models of SkyAir series Error Detection Method Error Generating Condition Supposed Overcurrent relay (for compressor) Compressor protection thermostat Causes Overcurrent relay may act due to the following reasons...
Page 143 Troubleshooting Based on Equipment Condition SiBE28-804 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Turn the operation switch ON and OFF, then wait at ON side. Does the unit Normal.
Page 144: Equipment Operates But Does Not Provide Cooling
SiBE28-804 Troubleshooting Based on Equipment Condition Equipment Operates but does not Provide Cooling Applicable Model All models of SkyAir series Error Detection Method Error Generating Condition Supposed Wrong selection of model Out of gas Causes Insufficient airflow in the indoor unit Increase of high pressure ∗...
Page 145 Troubleshooting Based on Equipment Condition SiBE28-804 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Measure the temperature of suction air and supply air. Temperature difference = Suction air temp. – Supply air temp.
Page 146: Equipment Operates But Does Not Provide Heating
SiBE28-804 Troubleshooting Based on Equipment Condition Equipment Operates but does not Provide Heating Applicable Model All models of SkyAir series Error Detection Method Error Generating Condition Supposed Wrong selection of model Out of gas in refrigerant Causes Insufficient airflow in the indoor unit Decrease of low pressure ∗...
Page 147 Troubleshooting Based on Equipment Condition SiBE28-804 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is this first starting after This is normal. Heating installation? operation will be conducted after 2 or 3 minutes.
Page 148: Equipment Discharges White Mist
SiBE28-804 Troubleshooting Based on Equipment Condition Equipment Discharges White Mist Applicable Model All models of SkyAir series Error Detection Method Error Generating Condition Supposed Humid installation site Installation site is dirty and with dense oil mists. Causes Soiled heat exchanger...
Page 149: Equipment Produces Loud Noise Or Shakes
Troubleshooting Based on Equipment Condition SiBE28-804 Equipment Produces Loud Noise or Shakes Applicable Model All models of SkyAir series Error Detection Method Error Generating Condition Supposed Improper installation Contacts of fan, piping, casing, etc. Causes Noise of refrigerant flow Operating noise of drain discharge equipment Noise of resin components contracting ∗...
Page 150 SiBE28-804 Troubleshooting Based on Equipment Condition Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. [Installation work side] Does the noise generate Correction of installation with vibration of whole ceilings and Reinforcement for ceilings or walls...
Page 151: Equipment Discharges Dust
Troubleshooting Based on Equipment Condition SiBE28-804 2.10 Equipment Discharges Dust Applicable Model All models of SkyAir series Error Detection Method Error Generating Condition Supposed Carpet Animal's hair Causes Application (cloth shop,...) Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred.
Page 152: Remote Controller Lcd Displays "88
SiBE28-804 Troubleshooting Based on Equipment Condition 2.11 Remote Controller LCD Displays "88" Applicable Model All models of SkyAir series Error Detection Method Error Generating Condition Supposed Causes Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred.
Page 153: Swing Flap Does Not Operate
Troubleshooting Based on Equipment Condition SiBE28-804 2.12 Swing Flap does not Operate Applicable FBQ, FHQ, FAQ, FUQ, FVQ Models Method of Utilizes ON/OFF of the limit switch when the motor turns. Malfunction Detection Malfunction 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).
Page 154 SiBE28-804 Troubleshooting Based on Equipment Condition Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Are the connectors correctly connected to X29A and Connect correctly. X14A on the PC board? Is the limit switch’s transfer connector...
Page 155: Procedure Of Self-Diagnosis By Remote Controller
Procedure of Self-Diagnosis by Remote Controller SiBE28-804 3. Procedure of Self-Diagnosis by Remote Controller The Inspection/Test Button The following modes can be selected by using the [Inspection/Test Operation] button on the remote control. Depress Inspection/Test Operation button for more than 4 seconds. Service data can be obtained.
Page 156: Fault-Diagnosis By Wired Remote Controller
SiBE28-804 Procedure of Self-Diagnosis by Remote Controller Fault-diagnosis by Wired Remote Controller Explanation If operation stops due to malfunction, the remote controller’s operation LED blinks, and malfunction code is displayed. (Even if stop operation is carried out, malfunction contents are displayed when inspection mode is entered.) The malfunction code enables you to tell what kind of malfunction caused operation to stop.
Page 157: Fault-Diagnosis By Wireless Remote Controller
Procedure of Self-Diagnosis by Remote Controller SiBE28-804 Fault-diagnosis by Wireless Remote Controller Introduction Contrary to the wired remote controller, the wireless remote controller does not display the error code. Instead, the operation LED on the light reception section flashes. Checking To find the error code, proceed as follows: Step Action...
Page 158 SiBE28-804 Procedure of Self-Diagnosis by Remote Controller Step Action Press the UP or DOWN button and change the UNIT No. until the receiver of the remote controller starts to beep. DOWN If you hear... Then... 3 short beeps Follow all steps below. 1 short beep Follow steps 3 and 4.
Page 159 Procedure of Self-Diagnosis by Remote Controller SiBE28-804 Step Action Press the UP or DOWN button to change the error code upper digit until the receiver of the remote controller starts to beep. DOWN DOWN If you hear... Then... 2 short beeps The upper digit matches.
Page 160 SiBE28-804 Procedure of Self-Diagnosis by Remote Controller Step Action Press the UP or DOWN button and change the error code lower digit until the receiver of the remote controller generates a continuous beep. DOWN DOWN Press the MODE button to return to normal status. If you do not press any button for at least 1 min, the remote controller returns automatically to normal status.
Page 161: Remote Controller Display Malfunction Code And Contents
Procedure of Self-Diagnosis by Remote Controller SiBE28-804 Remote Controller Display Malfunction Code and Contents Malfunction Code Contents/Processing Remarks Failure of PC board ass’y for indoor unit Malfunction of drain water level system Indoor unit fan motor overload / overcurrent / lock (Note 1) Swing flap motor lock Abnormal power supply voltage Abnormal drain water level...
Page 162 SiBE28-804 Procedure of Self-Diagnosis by Remote Controller Malfunction Code Contents/Processing Remarks Open phase or voltage unbalance Abnormal radiation fin temperature sensor (outdoor unit) Failure of capacity setting (outdoor unit) Either capacity data is set incorrectly, or capacity has not been set for the data IC Lack of gas malfunction Abnormal suction pipe temperature Applicable Models : (Note 3)
Page 163: Troubleshooting By Led Indications
Troubleshooting by LED Indications SiBE28-804 4. Troubleshooting by LED Indications Troubleshooting by LED on the Indoor Units Foreword Troubleshooting can be carried out by service monitor LED (green). (Blinks when normal) 4 : LED on / 7 : LED off / 5 : LED blinks / — : No connection with troubleshooting Microcomputer Transmission Normal Monitor...
Page 164: Troubleshooting By Led On Outdoor Unit Pc Board
SiBE28-804 Troubleshooting by LED Indications Troubleshooting by LED on Outdoor Unit PC Board The following diagnosis can be conducted by turning on the power switch and checking the LED indication on the printed circuit board of the outdoor unit. 4 : LED on / 7 : LED off / 5 : LED blinks / — : No connection with troubleshooting LED detection Microcomputer in Error detection...
Page 165: Troubleshooting By Remote Controller Display / Led Display
Troubleshooting by Remote Controller Display / LED Display SiBE28-804 5. Troubleshooting by Remote Controller Display / LED Display Explanation for 5 : LED blinks / 4 : LED on / 7 : LED off / — : No connection with troubleshooting Symbols : High probability of malfunction : Possibility of malfunction...
Page 166: Outdoor Malfunctions
SiBE28-804 Troubleshooting by Remote Controller Display / LED Display Outdoor Malfunctions Outdoor Unit Remote Location of Malfunction Contents of Malfunction Details of Malfunction Controller Malfunction Other PC Board Display (Reference than PC Outdoor Indoor Remote Page) Board Unit Unit Controller —...
Page 167: System Malfunctions
Troubleshooting by Remote Controller Display / LED Display SiBE28-804 System Malfunctions System Remote Location of Malfunction Contents of Malfunction Details of Malfunction Controller Malfunction Other PC Board Display (Reference than PC Outdoor Indoor Remote Page) Board Unit Unit Controller — Transmission error (between indoor and outdoor unit) —...
Page 168: Overview Of The Outdoor Safety Devices
SiBE28-804 Troubleshooting by Remote Controller Display / LED Display Overview of the Outdoor Safety Devices High pressure switch Fuse Open Close RZQ(S)71 4.0 Mpa +0/-0.15 3.0 +/-0.15 6.3A/250V RZQ(S)100 RZQ(S)125 RZQ(S)140 Troubleshooting...
Page 169: Overview Of The Indoor Safety Devices
Troubleshooting by Remote Controller Display / LED Display SiBE28-804 Overview of the Indoor Safety Devices Thermal protector Thermal fuse fan motor Abnormal Reset (automatic) FFQ35~60 >130°C +/-5°C <83°C +/-20°C N.A. FCQ35~71 >130°C +/-5°C <83°C +/-20°C N.A. FCQ100~140 >140°C +/-5°C <45°C +/-15°C N.A.
Page 170: A1" Malfunctioning Indoor Pc Board
SiBE28-804 Troubleshooting by Remote Controller Display / LED Display “A1” Malfunctioning Indoor PC Board Remote Controller Display LED indications The table below shows the LED indications. Operation HAP (green) HBP (green) Normal Malfunctioning — — Error generation The error is generated when the data from the EEPROM is not received correctly. EEPROM (Electrically Erasable Programmable Read Only Memory): A memory chip that holds its content without power.
Page 171: A3" Malfunction Of Drain Water Level System
Troubleshooting by Remote Controller Display / LED Display SiBE28-804 “A3” Malfunction of Drain Water Level System Remote Controller Display LED indications The table below shows the LED indications. Operation HAP (green) HBP (green) Normal Malfunctioning Error generation The error is generated when the water level reaches its upper limit and when the float switch turns OFF.
Page 172 SiBE28-804 Troubleshooting by Remote Controller Display / LED Display Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Begin Is the the short Is the Connect the optional circuit connector unit a drain raising Short-circuit...
Page 173: A6" Indoor Unit Fan Motor Lock
Troubleshooting by Remote Controller Display / LED Display SiBE28-804 “A6” Indoor Unit Fan Motor Lock Remote Controller Display LED indications The table below shows the LED indications. Operation HAP (green) HBP (green) Normal Malfunctioning Error generation The error is generated when the fan rotations are not detected while the output voltage to the fan is at its maximum.
Page 174 SiBE28-804 Troubleshooting by Remote Controller Display / LED Display Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check the connections of X20A and X26A. Connect X20A and X20A and X26A X26A correctly.
Page 175: A7" Swing Flap Motor Malfunction / Lock
Troubleshooting by Remote Controller Display / LED Display SiBE28-804 “A7” Swing Flap Motor Malfunction / Lock Remote Controller Display LED indications The table below shows the LED indications. Operation HAP (green) HBP (green) Normal Malfunctioning Error generation The error is detected by the limit switch when the motor turns. When ON/OFF of the microswitch for position detection cannot be reversed eventhough the swing flap motor is energized for a specified amount of time (about 30 seconds).
Page 176 SiBE28-804 Troubleshooting by Remote Controller Display / LED Display Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. the connectors correctly connected Connect correctly. to X29A and X14A on the PC board? Is the limit switch's transfer...
Page 177: A8" Abnormal Power Supply Voltage
Troubleshooting by Remote Controller Display / LED Display SiBE28-804 5.10 “A8” Abnormal Power Supply Voltage Remote Controller Display LED indications The table below shows the LED indications. Operation HAP (green) HBP (green) Normal Malfunctioning Method of Detect malfunction checking the input voltage of fan motor. Malfunction Detection Malfunction...
Page 178: Af" Malfunctioning Drain System
SiBE28-804 Troubleshooting by Remote Controller Display / LED Display 5.11 “AF” Malfunctioning Drain System Remote Controller Display LED indications The table below shows the LED indications. Operation HAP (green) HBP (green) Normal Malfunctioning Error generation The error is generated when the float switch changes from ON to OFF while the compressor is OFF.
Page 179 Troubleshooting by Remote Controller Display / LED Display SiBE28-804 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Possible failure of float Are float switch. Check to see if drain- switch and drain up height and horizontal pipe pipe normal?
Page 180: Aj" Malfunctioning Capacity Setting
SiBE28-804 Troubleshooting by Remote Controller Display / LED Display 5.12 “AJ” Malfunctioning Capacity Setting Remote Controller Display LED indications The table below shows the LED indications. Operation HAP (green) HBP (green) Normal Malfunctioning Error generation The error is generated when the following conditions are fulfilled: Condition Description The unit is in operation.
Page 181 Troubleshooting by Remote Controller Display / LED Display SiBE28-804 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check if the capacity setting adapter is plugged into X23A of the indoor PC board.
Page 182: C1" Failure Of Transmission (Between Indoor Unit Pc Board And Fan Pc Board)
SiBE28-804 Troubleshooting by Remote Controller Display / LED Display 5.13 “C1” Failure of transmission (between indoor unit PC board and fan PC board) Remote Controller Display LED indications The table below shows the LED indications. Operation HAP (green) HBP (green) Normal Malfunctioning Method of...
Page 183 Troubleshooting by Remote Controller Display / LED Display SiBE28-804 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is the connector between indoor PC board (A1P) and Connect the connector accurately. PC board for fan (A2P) accurately connected? (*1) Confirm the condition...
Page 184: C4", "C9" Thermistor Abnormality
SiBE28-804 Troubleshooting by Remote Controller Display / LED Display 5.14 “C4”, “C9” Thermistor Abnormality Remote The table below describes the two thermistor abnormalities. Controller Error Description Display Malfunctioning heat exchanger thermistor system. Malfunctioning suction air thermistor system. LED indications The table below shows the LED indications. Operation HAP (green) HBP (green)
Page 185 Troubleshooting by Remote Controller Display / LED Display SiBE28-804 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check the connector connection. Correct the Is it connected connection. properly? Check the thermistor resistance.
Page 186: C6" Failure Of Combination (Between Indoor Unit Pc Board And Fan Pc Board)
SiBE28-804 Troubleshooting by Remote Controller Display / LED Display 5.15 “C6” Failure of combination (between indoor unit PC board and fan PC board) Remote Controller Display LED indications The table below shows the LED indications. Operation HAP (green) HBP (green) Normal Malfunctioning Method of...
Page 187: Cj" Malfunctioning Remote Controller Air Thermistor
Troubleshooting by Remote Controller Display / LED Display SiBE28-804 5.16 “CJ” Malfunctioning Remote Controller Air Thermistor Remote Controller Display LED indications The table below shows the LED indications. Operation HAP (green) HBP (green) Normal Malfunctioning Error generation The error is generated when the remote controller thermistor becomes disconnected or shorted while the unit is running.
Page 188: Cc" Humidity Sensor System Malfunction
SiBE28-804 Troubleshooting by Remote Controller Display / LED Display 5.17 “CC” Humidity Sensor System Malfunction Remote Controller Display LED indications The table below shows the LED indications. Operation HAP (green) HBP (green) Normal Malfunctioning Error generation The error is generated when the humidity sensor becomes disconnected or shorted while the unit is running.
Page 189: E1" Failure Of Outdoor Unit Pc Board
Troubleshooting by Remote Controller Display / LED Display SiBE28-804 5.18 “E1” Failure of Outdoor Unit PC Board Remote Controller Display Method of Microcomputer checks whether E PROM is normal. Malfunction Detection Malfunction PROM: When E PROM malfunctions when turning the power supply on Decision Conditions Supposed...
Page 190: E3" Abnormal High Pressure (Detected By The Hps)
SiBE28-804 Troubleshooting by Remote Controller Display / LED Display 5.19 “E3” Abnormal High Pressure (Detected by the HPS) Remote Controller Display Method of The protection device circuit checks continuity in the high pressure switch. Malfunction Detection Malfunction When the high pressure switch is actuated Actuating pressure: Decision RZQ(S)71~140...
Page 191 Troubleshooting by Remote Controller Display / LED Display SiBE28-804 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check the installation conditions. Is the Open the stop valve. stop valve open? control and protection HPS Connect correctly.
Page 192: E4" Actuation Of Low Pressure Sensor: Single Phase C Series
SiBE28-804 Troubleshooting by Remote Controller Display / LED Display 5.20 “E4” Actuation of Low Pressure Sensor: Single phase C Series Remote Controller Display Applicable RZQ71~140C7V1B, RZQS71~140C7V1B Models Method of [In cooling] Detect malfunctions by the pressure sensor (S1NPH). Malfunction [In heating] Detection Detect malfunctions by the heat exchanger distribution pipe thermistor (R4T).
Page 193 Troubleshooting by Remote Controller Display / LED Display SiBE28-804 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution 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...
Page 194: E5" Compressor Motor Lock
SiBE28-804 Troubleshooting by Remote Controller Display / LED Display 5.21 “E5” Compressor Motor Lock Remote Controller Display Applicable RZQ(S)71~140 Models Method of Inverter PC board takes the position signal from UVWN line connected between the inverter and compressor, and detects the position signal pattern. Malfunction Detection Malfunction...
Page 195 Troubleshooting by Remote Controller Display / LED Display SiBE28-804 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check the installation conditions. Is the stop valve Open the stop valve. open? Is the UVWN wiring...
Page 196: E7" Malfunction Of Outdoor Unit Fan Motor
SiBE28-804 Troubleshooting by Remote Controller Display / LED Display 5.22 “E7” Malfunction of Outdoor Unit Fan Motor Remote Controller Display Applicable RZQ(S)71~140 Models Method of Abnormality of fan motor system is detected according to the fan speed detected by hall IC when the fan motor runs.
Page 197 Troubleshooting by Remote Controller Display / LED Display SiBE28-804 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is the supply Ask repair so that the voltage within the range 180 to supply voltage will be 220 VAC ? within the normal range.
Page 198 SiBE28-804 Troubleshooting by Remote Controller Display / LED Display Is the resistance value of the fan Replace the fan motor. motor normal? Is the fuse Replace the fuse. conductive? (*1) Properly plug the fan motor connector and then turn ON the power again. Replace the outdoor PC Dose "...
Page 199: E9" Malfunction Of Electronic Expansion Valve
Troubleshooting by Remote Controller Display / LED Display SiBE28-804 5.23 “E9” Malfunction of Electronic Expansion Valve Remote Controller Display Applicable RZQ(S)71~140 Models Method of Method is determined according to the suction pipe superheat degree and electronic expansion valve opening degree calculated by values of low pressure sensor and suction pipe temperature Malfunction thermistor.
Page 200 SiBE28-804 Troubleshooting by Remote Controller Display / LED Display Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Turn OFF the power supply once and then turn it ON again. Does the malfunction code "E9"...
Page 201 Troubleshooting by Remote Controller Display / LED Display SiBE28-804 Actually, it is in wet operation. Refer to Check 13,14,15 (P236~239) to eliminate the causes of wet operation. Restart operation. Does the malfunction Replace the outdoor PC code "E9" board (A1P). recur? It is believed that factors (noise, etc.,) other than failure...
Page 202: F3" Malfunctioning In Discharge Pipe Temperature
SiBE28-804 Troubleshooting by Remote Controller Display / LED Display 5.24 “F3” Malfunctioning in Discharge Pipe Temperature Remote Controller Display Applicable RZQ(S)71~140 Models Method of Abnormality is detected according to the temperature detected by the discharge pipe temperature sensor. Malfunction Detection Malfunction When the discharge pipe temperature rises to an abnormally high level When the discharge pipe temperature rises suddenly...
Page 203 Troubleshooting by Remote Controller Display / LED Display SiBE28-804 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is the discharge pipe Abnormality in refrigerant system temperature high? such as gas shortage, faulty (See *1.) compressor, etc.
Page 204: H3" Malfunctioning Hps System
SiBE28-804 Troubleshooting by Remote Controller Display / LED Display 5.25 “H3” Malfunctioning HPS System Remote Controller Display Applicable RZQ(S)71~140 Models Method of The protection device circuit checks continuity in the high pressure switch. Malfunction Detection Malfunction When there is no continuity in the high pressure switch during compressor stops operating. Decision Conditions Supposed...
Page 205: H9", "J3", "J5", "J6", "J7", "J8" Malfunction Of Thermistor System
Troubleshooting by Remote Controller Display / LED Display SiBE28-804 5.26 “H9”, “J3”, “J5”, “J6”, “J7”, “J8” Malfunction of Thermistor System H9, J3, J5, J6, J7, J8 Remote Controller Display Applicable RZQ(S)71~140 Models Method of Abnormality is detected according to the temperature detected by each individual thermistor. Malfunction Detection Malfunction...
Page 206: J1" Malfunction Of Pressure Sensor
SiBE28-804 Troubleshooting by Remote Controller Display / LED Display 5.27 “J1” Malfunction of Pressure Sensor Remote Controller Display Applicable RZQ71~140C7V1B RZQS71~140C7V1B Models Method of The malfunction is detected by the pressure measured with pressure sensor (S1NPH) Malfunction Detection Malfunction When the detect pressure becomes following; •...
Page 207 Troubleshooting by Remote Controller Display / LED Display SiBE28-804 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check if the connector for the pressure sensor (X17A) is correctly connected to the outdoor unit PC board (A1P) Is it connected Connect correctly.
Page 208: L1" Faulty Outdoor Pc Board
SiBE28-804 Troubleshooting by Remote Controller Display / LED Display 5.28 “L1” Faulty Outdoor PC Board Remote Controller Display Applicable RZQ71~140C7V1B, RZQS71~140C7V1B Models Method of Detect malfunctions by current value during waveform output before compressor startup. Detect malfunctions by current sensor value during synchronized operation at the time of Malfunction startup.
Page 209 Troubleshooting by Remote Controller Display / LED Display SiBE28-804 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is the power supply voltage Request an between 180 and improvement to make 220 VAC? the power supply voltage fall within the...
Page 210: L4" Radiation Fin Temperature Increased
SiBE28-804 Troubleshooting by Remote Controller Display / LED Display 5.29 “L4” Radiation Fin Temperature Increased Remote Controller Display Applicable RZQ(S)71~140 Models Method of Fin temperature is detected by the thermistor of the radiation fin. Malfunction Detection Malfunction When the temperature of the inverter radiation fin increases abnormally due to faulty heat dissipation.
Page 211 Troubleshooting by Remote Controller Display / LED Display SiBE28-804 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Can it be considered that the fin Eliminate the cause. temperature was high? (*1) Is the connector of the fin thermistor...
Page 212: L5" Dc Output Overcurrent (Instantaneous)
SiBE28-804 Troubleshooting by Remote Controller Display / LED Display 5.30 “L5” DC Output Overcurrent (Instantaneous) Remote Controller Display Applicable RZQ(S)71~140 Models Method of Malfunction is detected by converting the current flowing to power transistor into voltage with CT1 (DC current sensor). Malfunction Detection Malfunction...
Page 213 Troubleshooting by Remote Controller Display / LED Display SiBE28-804 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check the installation conditions. Open the stop valve. Is the stop valve open? Is the compressor coil Replace the compressor.
Page 214: L8" Electronic Thermal (Time Lag)
SiBE28-804 Troubleshooting by Remote Controller Display / LED Display 5.31 “L8” Electronic Thermal (Time Lag) Remote Controller Display Applicable RZQ(S)71~140 Models Method of Malfunction is detected by converting the current flowing to power transistor into voltage with CT1 (DC current sensor). Malfunction Inverter PC board detects the disorder of position signal.
Page 215 Troubleshooting by Remote Controller Display / LED Display SiBE28-804 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is the secondary current of the inverter higher than ∗A (see Compressor overload Inspection of the compressor below) for each...
Page 216: L9" Stall Prevention (Time Lag)
SiBE28-804 Troubleshooting by Remote Controller Display / LED Display 5.32 “L9” Stall Prevention (Time Lag) Remote Controller Display Applicable RZQ(S)71~140 Models Method of Malfunction is detected by converting the current flowing to power transistor into voltage with CT1 (DC current sensor). Malfunction Inverter PC board detects the disorder of position signal.
Page 217 Troubleshooting by Remote Controller Display / LED Display SiBE28-804 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution 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...
Page 218: Lc" Malfunction Of Transmission System (Between Control And Inverter Pc Board)
SiBE28-804 Troubleshooting by Remote Controller Display / LED Display 5.33 “LC” Malfunction of Transmission System (between Control and Inverter PC Board) Remote Controller Display Applicable RZQ(S)71~140 Models Method of Checks and sees whether transmission between control and inverter PC board is carried out normally.
Page 219 Troubleshooting by Remote Controller Display / LED Display SiBE28-804 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is the fan motor connector Connect the connector, and connected? turn on again. connectors connecting the Connect the transmission...
Page 220: P1" Open Phase Or Power Supply Voltage Imbalance
SiBE28-804 Troubleshooting by Remote Controller Display / LED Display 5.34 “P1” Open Phase or Power Supply Voltage Imbalance Remote Controller Display Applicable RZQ(S)71~140 Models Method of Malfunction is detected according to the voltage waveform of main circuit capacitor built in inverter.
Page 221: P4" Malfunction Of Radiator Fin Temperature Thermistor
Troubleshooting by Remote Controller Display / LED Display SiBE28-804 5.35 “P4” Malfunction of Radiator Fin Temperature Thermistor Remote Controller Display Applicable RZQ(S)71~140 Models Method of Detection by open or short circuit of the radiator fin temperature thermistor during the compressor stops operating. Malfunction Detection Malfunction...
Page 222: Pj" Failure Of Capacity Setting
SiBE28-804 Troubleshooting by Remote Controller Display / LED Display 5.36 “PJ” Failure of Capacity Setting Remote Controller Display Applicable RZQ(S)71~140 Models Method of Check whether set value written in E PROM (at factory) or set value of capacity setting adaptor (for replacement) is the same as outdoor unit capacity.
Page 223: U0" Gas Shortage (Malfunction)
Troubleshooting by Remote Controller Display / LED Display SiBE28-804 5.37 “U0” Gas Shortage (Malfunction) Remote Controller Display Applicable RZQ71~140C7V1B, RZQS71~140C7V1B Models Method of (In cooling operation) Detection based on difference in temperature between temperature preset by remote controller Malfunction and indoor suction air temperature, motorized valve opening degree, compressor frequency and Detection low pressure.
Page 224 SiBE28-804 Troubleshooting by Remote Controller Display / LED Display Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check 13 (P236) Check for refrigerant shortage. the refrigerant level Collect refrigerant and proper? recharge a proper amount of refrigerant...
Page 225: U2" Abnormal Power Supply Voltage
Troubleshooting by Remote Controller Display / LED Display SiBE28-804 5.38 “U2” Abnormal Power Supply Voltage Remote Controller Display Applicable RZQ(S)71~140 Models Method of Malfunction is detected according to the voltage of main circuit capacitor built in the inverter and power supply voltage. Malfunction Detection Malfunction...
Page 226 SiBE28-804 Troubleshooting by Remote Controller Display / LED Display Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check LED on outdoor unit PC board. (Is the Other factors voltage insufficient?) the power supply voltage between...
Page 227: U4", "Uf" Malfunction Of Transmission Between Indoor And Outdoor Unit
Troubleshooting by Remote Controller Display / LED Display SiBE28-804 5.39 “U4”, “UF” Malfunction of Transmission between Indoor and Outdoor Unit Remote Controller Display Applicable RZQ(S)71~140 Models Error generation The error is generated when the microprocessor detects that the transmission between the indoor and the outdoor unit is not normal over a certain amount of time.
Page 228 SiBE28-804 Troubleshooting by Remote Controller Display / LED Display Troubleshooting Diagnosis of incorrect or broken/disconnected wiring. If the LEDs on the indoor unit PC board are off, it indicates that the transmission wiring between indoor and outdoor units may be incorrect or broken/disconnected.
Page 229 Troubleshooting by Remote Controller Display / LED Display SiBE28-804 Check the resistance value of the outdoor fan motor. Is the resistance value of the Replace the outdoor fan outdoor fan motor motor. normal? Does the fuse Replace the fuse. (*2) have continuity? Check 10 Check the fan output voltage.
Page 230: Uf" Malfunction Of Transmission Between Indoor And Outdoor Unit / Piping And Wiring Mismatch / Gas Shortage
SiBE28-804 Troubleshooting by Remote Controller Display / LED Display 5.40 “UF” Malfunction of Transmission between Indoor and Outdoor Unit / Piping and Wiring Mismatch / Gas Shortage Remote Controller Display Applicable RZQ(S)71~140 Models Method of Check the transmission between the indoor and outdoor units with a microcomputer when the power turned ON.
Page 231: U5" Malfunction Of Transmission Between Indoor Unit And Remote Controller
Troubleshooting by Remote Controller Display / LED Display SiBE28-804 5.41 “U5” Malfunction of Transmission between Indoor Unit and Remote Controller Remote Controller Display Applicable All models of indoor units Models Error generation The error is generated when the microprocessor detects that the transmission between the indoor unit and the remote controller is not normal over a certain amount of time.
Page 232: U8" Malfunction Of Transmission Between Main Remote Controller And Sub Remote Controller
SiBE28-804 Troubleshooting by Remote Controller Display / LED Display 5.42 “U8” Malfunction of Transmission between MAIN Remote Controller and SUB Remote Controller Remote Controller Display Applicable All models of indoor units Models Error generation The error is generated when, in case of controlling with two remote controllers, the microprocessor detects that the transmission between the indoor unit and the remote controllers (MAIN and SUB) is not normal over a certain amount of time.
Page 233: Ua" Malfunctioning Field Setting Switch
Troubleshooting by Remote Controller Display / LED Display SiBE28-804 5.43 “UA” Malfunctioning Field Setting Switch Remote Controller Display Applicable All models of indoor units Models Error generation The error is generated when incorrect field settings have been set for pair/twin/triple/double twin.
Page 234 SiBE28-804 Troubleshooting by Remote Controller Display / LED Display Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Is the remote controller connected to more than Connect the remote controller one indoor correctly.
Page 235: Uc" Centralized Address Setting Error
Troubleshooting by Remote Controller Display / LED Display SiBE28-804 5.44 “UC” Centralized Address Setting Error Remote Controller Display Applicable All models of indoor units Models Method of Indoor unit microcomputer detects and judges the centralized address signal according to the transmission between indoor units.
Page 236 SiBE28-804 Troubleshooting by Remote Controller Display / LED Display Check No.1 Outdoor Unit: Checking the Installation Condition Checking To check the installation condition, proceed as follows: Check the spaces for all air passage around the suction and discharge areas. Is the minimum space Change the rescpected?
Page 237 Troubleshooting by Remote Controller Display / LED Display SiBE28-804 Check No.2 Outdoor Unit: Checking the Expansion Valve Checking To check the electronic expansion valve, proceed as follows: Step Action Check if the expansion valve connector is correctly inserted in the X12A of A1P. Compare the expansion valve unit with the number of the connector to make sure it is correctly connected.
Page 238 SiBE28-804 Troubleshooting by Remote Controller Display / LED Display Check No.3 Checking the Thermistors Thermistors If the cause of the problem is related to the thermistors, then the thermistors should be checked prior to changing the PC board. For more information about these thermistors, see: “Wiring Diagrams’’...
Page 239 Troubleshooting by Remote Controller Display / LED Display SiBE28-804 Check No.4 Resistance Conversion Table (Ambient, Coil, Fin) Temperature – The table below is the thermistor (Indoor : Suction air, Coil / Outdoor : Ambient, Coil, Pipe without discharge, Fin) temperature – resistance conversion table. resistance Temp.
Page 240 SiBE28-804 Troubleshooting by Remote Controller Display / LED Display Check No.5 Resistance Conversion Table (Discharge Pipe Sensor) Temperature – The table below is the discharge pipe thermistor temperature – resistance conversion table. resistance Temp. Resist. Temp. Resist. Temp. Resist. (°C) (kΩ) (°C) (kΩ)
Page 241 Troubleshooting by Remote Controller Display / LED Display SiBE28-804 Check No.6 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 242 SiBE28-804 Troubleshooting by Remote Controller Display / LED Display Check No.7 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.
Page 243 Troubleshooting by Remote Controller Display / LED Display SiBE28-804 Check No.8 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 expansion difference Choked moisture expansion valve.
Page 244 SiBE28-804 Troubleshooting by Remote Controller Display / LED Display Check No.9 Outdoor Unit: Fan Motor Signal Line For RZQ(S)71~140 models (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.
Page 245 Troubleshooting by Remote Controller Display / LED Display SiBE28-804 Check No.10 Outdoor Unit: Fan Speed Pulse For 1 Fan & 2 Fan models (1) Disconnect the connector X2A with the power supply OFF and Operation OFF. (2) Is the voltage between pins 4 and 3 of X2A about 15 VDC after turning the power supply on? (3) Is the voltage between pins 4 and 1 of X2A about 5 VDC? (4) Connect the connector A* with the power supply OFF and Operation OFF.
Page 246 SiBE28-804 Troubleshooting by Remote Controller Display / LED Display Check No.11 Outdoor Unit: Check for Power Transistor Judgment 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.
Page 247 Troubleshooting by Remote Controller Display / LED Display SiBE28-804 Check No.13 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 gas shortage, the electronic expansion valve tends to open (opens fully) in order to avoid overheat operation.
Page 248 SiBE28-804 Troubleshooting by Remote Controller Display / LED Display <Diagnosis of inadequate refrigerant> In heating operation (1) As suction superheat degree increases due to gas shortage, the electronic expansion valve tends to open (opens fully) to avoid overheat operation. (2) As suction superheat degree increases due to gas shortage, compressor frequency decreases because suction superheat degree is controlled in order to prevent oil to the outdoor heat exchanger from being retained.
Page 249 Troubleshooting by Remote Controller Display / LED Display SiBE28-804 Check No.14 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 250 SiBE28-804 Troubleshooting by Remote Controller Display / LED Display Check No.15 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 ←...
Page 251 Troubleshooting by Remote Controller Display / LED Display SiBE28-804 Troubleshooting...
Page 252: Part 7 Appendix
SiBE28-804 Part 7 Appendix 1. Dimensions ..................242 1.1 RZQ71C7, RZQS71·100C7V1B............242 1.2 RZQ100~140C, RZQS125·140C7V1B..........243 2. Installation and Service Space (RZQ100~140C7, RZQS125~140C7)..........244 2.1 Non Stacked..................244 2.2 Stacked ....................245 2.3 Multiple Rows ..................245 3. Piping Diagrams..................246 3.1 Piping Symbol ..................246 3.2 Pair System ..................247 3.3 Twin System..................249 3.4 Triple System ..................251 3.5 Double Twin System ................252...
Page 253: Dimensions
Dimensions SiBE28-804 1. Dimensions RZQ71C7, RZQS71·100C7V1B 1.1.1 Outlook and Dimensions The illustration below shows the outlook and the dimensions of the unit (mm). 1.1.2 Components The table below contains the different components of the unit. Component Gas pipe connection φ 15.9 flare Liquid pipe connection φ...
Page 254: Rzq100~140C, Rzqs125·140C7V1B
SiBE28-804 Dimensions RZQ100~140C, RZQS125·140C7V1B 1.2.1 Outlook and Dimensions The illustration below shows the outlook and the dimensions of the unit (mm). 1.2.2 Components The table below contains the different components of the unit. Component Gas pipe connection φ15.9 flare Liquid pipe connection φ9.5 flare Service port (inside the unit) Grounding terminal M5 (inside the switch box) Refrigerant piping intake...
Page 255: Installation And Service Space (Rzq100~140C7, Rzqs125~140C7)
Installation and Service Space (RZQ100~140C7, RZQS125~140C7) SiBE28-804 2. Installation and Service Space (RZQ100~140C7, RZQS125~140C7) Non Stacked The illustrations and table below show the required installation and service space (mm). The values between brackets are for RZQ100~140C7, RZQS125~140C7 class. Suction side obstacle In these cases, close the bottom of the installation frame to prevent discharged air from being...
Page 256: Stacked
SiBE28-804 Installation and Service Space (RZQ100~140C7, RZQS125~140C7) Stacked The illustration below shows the required installation and service space (mm). The values in brackets are for RZQ100~140, RZQS125~140 class. Do not stack more than one unit. ± 100 mm is required as the dimension for laying the upper outdoor unit’s drain pipe. Get the portion A sealed so that air from the outlet does not bypass.
Page 257: Piping Diagrams
Piping Diagrams SiBE28-804 3. Piping Diagrams Piping Symbol Components The table below contains the different components of the piping diagrams. Component Function / remark Flare connection See pipe connection diameter. Liquid stop valve The liquid stop valve is used as shut-off valve in case of a pump-down. Gas stop valve with The gas stop valve is used as shut-off valve in case of a pump-down.
Page 258: Pair System
SiBE28-804 Piping Diagrams Pair System 3.2.1 RZQ71C7, RZQS71·100C7V1B Note: Piping Symbol Number : Refer to P246. Appendix...
Page 259 Piping Diagrams SiBE28-804 3.2.2 RZQ100~140C7, RZQS125·140C7V1B Liquid piping Gas piping Indoor unit Heating Outdoor unit Cooling 2 & 3 Note: Piping Symbol Number : Refer to P246. Appendix...
Page 260: Twin System
SiBE28-804 Piping Diagrams Twin System 3.3.1 RZQ71C7, RZQS71·100C7V1B Note: Piping Symbol Number : Refer to P246. Appendix...
Page 261 Piping Diagrams SiBE28-804 3.3.2 RZQ100~140C7, RZQS125·140C7V1B Indoor unit Liquid piping Gas piping Outdoor unit Heating Cooling 2 & 3 Indoor unit NOTE: The pipes between the branch and the indoor units should have the same size as the indoor connections. Note: Piping Symbol Number : Refer to P246.
Page 262: Triple System
SiBE28-804 Piping Diagrams Triple System 3.4.1 RZQ100~140C7, RZQS125·140C7V1B 2 & 3 Indoor unit Liquid piping Gas piping Indoor unit Outdoor unit Heating Cooling NOTE: The pipes between the branch and the indoor units should have the same size as the indoor connections. Indoor unit Note: Piping Symbol Number : Refer to P246.
Page 263: Double Twin System
Piping Diagrams SiBE28-804 Double Twin System 3.5.1 RZQ100~140C7, RZQS125·140C7V1B Indoor unit Indoor unit Liquid piping Gas piping Indoor unit Outdoor unit Heating Cooling 2 & 3 Indoor unit NOTE: The pipes between the branch and the indoor units should have the same size as the indoor connections. Note: Piping Symbol Number : Refer to P246.
Page 264: Pipe Connection Diameters
SiBE28-804 Piping Diagrams Pipe Connection Diameters Outdoor units The table below contains the refrigerant pipe connection diameters. φ Gas pipe (flare) φ Liquid pipe (flare) Model RZQ71C7V1B RZQ100C7V1B RZQ125C7V1B RZQ140C7V1B 15.9 mm 9.52 mm RZQS71C7V1B RZQS100C7V1B RZQS125C7V1B RZQS140C7V1B Appendix...
Page 265: Re-Using Existing Field Piping
Use the supplied flare nut. Existing piping work for new air conditioner Notes: Oil contamination can be checked using the Daikin “Oil Checker Card”. Caution: If copper piping is corroded, existing piping re-use is not allowed. Single side thermal insulation is not allowed for re-use.
Page 266 SiBE28-804 Piping Diagrams 3.7.3 Precautions on Refrigerant Piping Do not allow anything other than the designated refrigerant to get mixed into the freezing cycle (air, moisture,... ). If any refrigerant gas leaks while working on the unit, ventilate the room thoroughly immediately. Use R-410A only when adding refrigerant.
Page 267 Piping Diagrams SiBE28-804 3.7.6 Refrigerant Pipe Size Pipe size down and pipe size up is available for main piping (L1) only. Refrigerant pipe size Gas pipe Model Size-down Standard size Size-up φ 12.7 RZQ(S)71 –– φ 15.9 φ 19.1 RZQ(S)100~140 ––...
Page 268 SiBE28-804 Piping Diagrams 3.7.7 Allowable Pipe Length and Heigth Difference When re-using existing piping, refer to below table for allowable piping length and heigth difference (figures in brackets are equivalent lengths). Liquid pipe RZQ125 RZQ71 RZQ100 size & 140 Maximum allowable piping length (*) size-down 10 m (15 m) Pair: L1...
Page 269 Piping Diagrams SiBE28-804 RZQS Liquid pipe RZQS125 RZQS71 RZQS100 size & 140 Maximum total one-way piping length Pair: L1 standard 30 m (40 m) 50 m (70 m) Twin and triple: L1 + L2 standard Double twin: L1 + L2 + L4 Maximum allowable piping length Twin: L1 + L2 + L3 30 m...
Page 270 SiBE28-804 Piping Diagrams Caution for flare Refer to below table for correct flare dimensions and tightening torques. Too high tightening force may cause refrigerant leak because of flare cracking: connections Flare nut A dimensions for Piping size Flare shape tightening torque processing flares (mm) 14.2~17.2 N·m φ...
Page 271: Wiring Diagrams
Wiring Diagrams SiBE28-804 4. Wiring Diagrams Outdoor Unit 4.1.1 RZQ71C7, RZQS71·100C7V1B The illustration below shows the wiring diagram of the unit. Indoor Outdoor (Note4) El. comp. Assy Position of elements Position of compressor terminal (Front) (Back) Notes: 1. This wiring diagram only applies to the outdoor unit 2.
Page 272 SiBE28-804 Wiring Diagrams 4.1.2 RZQ100~140C7, RZQS125·140C7V1B The illustration below shows the wiring diagram of the unit. Printed circuit board Power supply Printed circuit board Resistor Printed circuit board Resistor Printed circuit board Thermistor (Air) Thermistor (M1C discharge) BS1~4 Push button switch Thermistor (Suction) C1~4 Capacitor...
Page 273: Switch Box Layout
Switch Box Layout SiBE28-804 5. Switch Box Layout RZQ71C7, RZQS71·100C7V1B The illustration below shows the switch box layout: IPM501 X106A X11A DB501 Q501 D532 X21A D531 X13A DB502 X11A X41A X12A X17A X25A X77A X803A Appendix...
Page 274: Rzq100~140C7, Rzqs125·140C7V1B
SiBE28-804 Switch Box Layout RZQ100~140C7, RZQS125·140C7V1B The illustration below shows the switch box layout: Item Description Printed circuit board (control) Printed circuit board (inverter) Printed circuit board Printed circuit board Terminal strip Appendix...
Page 275: Pcb Layout
PCB Layout SiBE28-804 6. PCB Layout RZQ71C7, RZQS71·100C7V1B Control PC board The illustration below shows the PC board connectors. (A1P) IPM501 X106A X11A DB501 Q501 D532 X21A D531 X13A DB502 X11A X41A X12A X17A X25A X77A X803A Connectors The table below describes the PC board connectors. Connector Connected to Description...
Page 276: Rzq100~140C7, Rzqs125·140C7V1B
SiBE28-804 PCB Layout RZQ100~140C7, RZQS125·140C7V1B Control & Inverter The illustration below shows the PC board connectors. PC board (A1P) X106A X107A X111A X21A X13A X11A X12A X41A X17A X32A X25A X51A X28A X77A Connectors The table below describes the PC board connectors. Connector Connected to Description...
Page 277 PCB Layout SiBE28-804 Appendix...
Page 278: Part 8 Removal Procedure
SiBE28-804 Part 8 Removal Procedure 1. RZQ71C7, RZQS71·100C7V1B............268 1.1 Removal of Outside Panels and Related Parts ........268 1.2 Removal of Propeller Fan and Fan Motor ..........269 1.3 Removal of Switch Box ................270 1.4 Removal of PC Board Assy (1) ............271 1.5 Removal of PC Board Assy (2) ............272 1.6 Removal of PC Board Assy (3) ............273 1.7 Removal of Low Pressure Sensor, Electronic Expansion Valve,...
Page 279: Rzq71C7, Rzqs71·100C7V1B
RZQ71C7, RZQS71·100C7V1B SiBE28-804 1. RZQ71C7, RZQS71·100C7V1B Removal of Outside Panels and Related Parts Procedure Warning Be sure to commence the disassembling work after 10 minutes or more elapsed from all power supplies have been turned off. Step Procedure Points Remove the front panel 2 (the front panel of the Top panel side panel), after...
Page 280: Removal Of Propeller Fan And Fan Motor
SiBE28-804 RZQ71C7, RZQS71·100C7V1B Removal of Propeller Fan and Fan Motor Procedure Warning Be sure to commence the disassembling work after 10 minutes or more elapsed from all power supplies have been turned off. Step Procedure Points Remove the front panel 2, following the procedure indicated at "Removal of Outside Panels and...
Page 281: Removal Of Switch Box
RZQ71C7, RZQS71·100C7V1B SiBE28-804 Removal of Switch Box Procedure Warning Be sure to commence the disassembling work after 10 minutes or more elapsed from all power supplies have been turned off. Step Procedure Points Remove the front panel, the suction grille, the top Fan motor (X106A) panel, the side panel, and the piping cover, following...
Page 282: Removal Of Pc Board Assy (1)
SiBE28-804 RZQ71C7, RZQS71·100C7V1B Removal of PC Board Assy (1) Procedure Warning Be sure to commence the disassembling work after 10 minutes or more elapsed from all power supplies have been turned off. Step Procedure Points Remove the top panel, the front panel 2, the side PC board for the display panel, and the piping Outdoor...
Page 283: Removal Of Pc Board Assy (2)
RZQ71C7, RZQS71·100C7V1B SiBE28-804 Removal of PC Board Assy (2) Procedure Warning Be sure to commence the disassembling work after 10 minutes or more elapsed from all power supplies have been turned off. Step Procedure Points 2. Remove the mounting Mounting plate for plate for the electric Fixing screws the electric component...
Page 284: Removal Of Pc Board Assy (3)
SiBE28-804 RZQ71C7, RZQS71·100C7V1B Removal of PC Board Assy (3) Procedure Warning Be sure to commence the disassembling work after 10 minutes or more elapsed from all power supplies have been turned off. Step Procedure Points 3. Remove the assembly of Fixing screw the PC board (AIP) Remove the connectors...
Page 285: Removal Of Low Pressure Sensor, Electronic Expansion Valve, And Others
RZQ71C7, RZQS71·100C7V1B SiBE28-804 Removal of Low Pressure Sensor, Electronic Expansion Valve, and Others Procedure Warning Be sure to commence the disassembling work after 10 minutes or more elapsed from all power supplies have been turned off. Step Procedure Points Remove the outside panels, their parts, and Pressure sensor the switch box, following...
Page 286: Removal Of Thermistor
SiBE28-804 RZQ71C7, RZQS71·100C7V1B Removal of Thermistor Procedure Warning Be sure to commence the disassembling work after 10 minutes or more elapsed from all power supplies have been turned off. Step Procedure Points Remove the front panel 2, the right side panel, and the piping cover, following Thermister the procedure indicated at...
Page 287: Removal Of Four Way Valve
RZQ71C7, RZQS71·100C7V1B SiBE28-804 Removal of Four Way Valve Procedure Warning Be sure to commence the disassembling work after 10 minutes or more elapsed from all power supplies have been turned off. Step Procedure Points Collect the refrigerant. Be sure to confirm that the Remove the outside Coil for the four way refrigerant is completely...
Page 288: Removal Of Compressor
SiBE28-804 RZQ71C7, RZQS71·100C7V1B 1.10 Removal of Compressor Procedure Warning Be sure to commence the disassembling work after 10 minutes or more elapsed from all power supplies have been turned off. Step Procedure Points Collect the refrigerant. Be sure to confirm that the Remove the outside Fixing plate for the stop valve refrigerant is completely...
Page 289: Rzq100~140C7, Rzqs125·140C7V1B
RZQ100~140C7, RZQS125·140C7V1B SiBE28-804 2. RZQ100~140C7, RZQS125·140C7V1B Removal of Outside Panels Procedure Warning Be sure to commence the disassembling work after 10 minutes or more elapsed from all power supplies have been turned off. Step Procedure Points For the suction grille, pull the lower parts (in 7 places) frontward, disengage the hooks at...
Page 290: Removal Of Propeller Fan And Fan Motor
SiBE28-804 RZQ100~140C7, RZQS125·140C7V1B Removal of Propeller Fan and Fan Motor Procedure Warning Be sure to commence the disassembling work after 10 minutes or more elapsed from all power supplies have been turned off. Step Procedure Points Remove the front panel (2) accordance with the Removal Procedure for Outside Panels.
Page 291: Removal Of Switch Box
RZQ100~140C7, RZQS125·140C7V1B SiBE28-804 Removal of Switch Box Procedure Warning Be sure to commence the disassembling work after 10 minutes or more elapsed from all power supplies have been turned off. Step Procedure Points Remove the front panel (2) accordance with the If the top panel cannot be Removal Procedure for removed...
Page 292: Removal Of Pc Board
SiBE28-804 RZQ100~140C7, RZQS125·140C7V1B Removal of PC Board Procedure Warning Be sure to commence the disassembling work after 10 minutes or more elapsed from all power supplies have been turned off. Step Procedure Points Remove the top panel and the front panel (2) Hooks accordance with the Removal Procedure for...
Page 293: Removal Of Pressure Sensor, Electronic Expansion Valve, And Others
RZQ100~140C7, RZQS125·140C7V1B SiBE28-804 Removal of Pressure Sensor, Electronic Expansion Valve, and Others Procedure Warning Be sure to commence the disassembling work after 10 minutes or more elapsed from all power supplies have been turned off. Step Procedure Points Remove the top panel and the front panel (2) accordance with the Removal Procedure for...
Page 294: Removal Of Thermistor
SiBE28-804 RZQ100~140C7, RZQS125·140C7V1B Removal of Thermistor Procedure Warning Be sure to commence the disassembling work after 10 minutes or more elapsed from all power supplies have been turned off. Step Procedure Points Remove the top panel and the front panel (2) and side panel accordance with the Thermistor...
Page 295: Removal Of Four Way Valve
RZQ100~140C7, RZQS125·140C7V1B SiBE28-804 Removal of Four Way Valve Procedure Warning Be sure to commence the disassembling work after 10 minutes or more elapsed from all power supplies have been turned off. Step Procedure Points Recover the refrigerant. Be sure to remove the four According to the way valve only after the procedure for the removal...
Page 296: Removal Of Compressor
SiBE28-804 RZQ100~140C7, RZQS125·140C7V1B Removal of Compressor Procedure Warning Be sure to commence the disassembling work after 10 minutes or more elapsed from all power supplies have been turned off. Step Procedure Points Recover the refrigerant. Be sure to remove the (Refer to point column.) compressor only after the Remove the front panel...
Page 297 RZQ100~140C7, RZQS125·140C7V1B SiBE28-804 Removal Procedure...
Page 298: Part 9 Precautions For New Refrigerant (R-410A)
SiBE28-804 Part 9 Precautions for New Refrigerant (R-410A) 1. Precautions for New Refrigerant (R-410A) .........288 1.1 Outline ....................288 1.2 Refrigerant Cylinders................290 1.3 Service Tools..................291 Precautions for New Refrigerant (R-410A)
Page 299: Precautions For New Refrigerant (R-410A)
Precautions for New Refrigerant (R-410A) SiBE28-804 1. Precautions for New Refrigerant (R-410A) Outline 1.1.1 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 300 SiBE28-804 Precautions for New Refrigerant (R-410A) Thermodynamic characteristic of R-410A Temperature Steam pressure Density Specific heat at constant Specific enthalpy Specific entropy (kPa) (kg/m pressure (kJ/kgK) (kJ/kg) (kJ/KgK) Liquid Vapor Liquid Vapor Liquid Vapor Liquid Vapor Liquid Vapor Precautions for New Refrigerant (R-410A)
Page 301: Refrigerant Cylinders
Precautions for New Refrigerant (R-410A) SiBE28-804 Refrigerant Cylinders Cylinder specifications 2 The cylinder is painted refrigerant color (pink). 2 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 302: Service Tools
SiBE28-804 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 303 Precautions for New Refrigerant (R-410A) SiBE28-804 1. Flaring tool Flare gauge Specifications 2 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 2 Change of dimension A Dimension A For class-1: R-407C For class-2: R-410A...
Page 304 SiBE28-804 Precautions for New Refrigerant (R-410A) 2. Torque wrench Specifications 2 Dimension B Unit:mm Nominal size Class-1 Class-2 Previous No change in tightening torque No change in pipes of other sizes Differences 2 Change of dimension B Only 1/2", 5/8" are extended For class-1: R-407C For class-2: R-410A Dimension B...
Page 305 Precautions for New Refrigerant (R-410A) SiBE28-804 4. Leak tester Specifications 2 Hydrogen detecting type, etc. 2 Applicable refrigerants R-410A, R-407C, R-404A, R-507A, R-134a, etc. Differences 2 Previous testers detected chlorine. Since HFCs do not contain chlorine, new tester detects hydrogen. 5.
Page 306 SiBE28-804 Precautions for New Refrigerant (R-410A) 2 Temperature scale indicates the relationship between pressure and temperature in gas saturated state. Differences 2 Change in pressure 2 Change in service port diameter 7. Charge hose for R-410A (Hose with ball valve) Specifications 2 Working pressure 5.08 MPa (51.8 kg/cm 2 Rupture pressure 25.4 MPa (259 kg/cm...
Page 307 Precautions for New Refrigerant (R-410A) SiBE28-804 9. Weigher for refrigerant charge Specifications 2 High accuracy TA101A (for 10-kg cylinder) = ± 2g TA101B (for 20-kg cylinder) = ± 5g 2 Equipped with pressure-resistant sight glass to check liquid refrigerant charging. 2 A manifold with separate ports for HFCs and previous refrigerants is equipped as standard accessories.
Page 308: Index
SiBE28-804 Index Numerics 4-way Valve Control ..........45 DC Output Overcurrent (Instantaneous) ..... 201 Defrost Operation ..........47 Defrost Start Setting ..........115 A1 .................159 Discharge Pipe Temperature Control ....70 A3 .................160 Discharge Pipe Temperature A6 .................162 Protection Control .......... 80 A7 .................164 Draft Avoidance Control 1 ........
Page 309 SiBE28-804 Malfunctioning Indoor PC Board ......159 Malfunctioning Remote Controller Gas Shortage (Malfunction) .........212 Air Thermistor ..........176 General Expansion Valve Control ......79 Method of Operating Remote Controller ....26 General Frequency Control ........65 Model Name and Power Supply ......7 Model Series ............
Page 310 SiBE28-804 Test Run Checks ............84 Test Run Control ............44 The INSPECTION / TEST Button ......26 Thermistor Abnormality ........173 Thermostat Control ..........53 Troubleshooting Based on Equipment Condition ........124 Troubleshooting by LED Indications ....152 Troubleshooting by Remote Controller Display / LED Display ........154 U0 .................212 U2 .................214 U4 or UF ...............216...
Page 311 SiBE28-804 Index...
Page 312: Drawings & Flow Charts
SiBE28-804 Drawings & Flow Charts Indoor Unit Fan Motor Lock ......... 162 Inspection/Test Button ........144 Abnormal High Pressure Installation and Service Space (Detected by the HPS) ........179 Multiple Rows ..........245 Abnormal Power Supply Voltage ....166 Non Stacked ..........244 Actuation of Low Pressure Sensor Stacked ............
Page 313 SiBE28-804 Piping Diagrams Double Twin System ........252 Pair System ...........247 Pipe Connection Diameters ......253 Piping Symbol ..........246 Triple System ..........251 Twin System ..........249 Pressure-Enthalpy curves of HFC-32/125 (50/50wt%) ............288 Radiation Fin Temperature Increased ....199 Remote Controller Display Malfunction Code and Contents ............150 Remote Controller LCD Displays "88"...
Page 314 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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