Daikin VRVIII-S- Manuals

Safety Considerations SiUS34-907 v 1. Safety Considerations Read these SAFETY CONSIDERATIONS carefully before performing any repair work. Comply with these safety symbols without fail. Meanings of DANGER , WARNING , CAUTION , and NOTE Symbols: DANGER .............. Indicates an imminently hazardous ...

SiUS34-907 Safety Considerations vi may generate toxic gases if it comes into contact with flames. • Do not repair the electrical components with wet hands. Working on the equipment with wet hands may cause an electrical shock. • Do not clean the air conditioner or heat pump by splashing water on it...

Safety Considerations SiUS34-907 vii 1.3 PREFACE Thank you for your continued patronage of Daikin products. This is the new service manual for Daikin's Year 2010 VRVIII-S series Heat Pump System.Daikin offers a wide range of models to respond to building and office air conditioning needs. We are con...

SiUS34-907 General Information 1 Part 1 General Information 1. Model Names of Indoor/Outdoor Units........................................................ 22. External Appearance................................................................................... 3 2.1 Indoor Units ......................

Model Names of Indoor/Outdoor Units SiUS34-907 2 General Information 1. Model Names of Indoor/Outdoor Units Indoor Units Outdoor Units (Inverter Series) Type Model Name Power Supply Ceiling Mounted Cassette Type (Multi Flow) FXFQ — — 12M 18M 24M 30M 36M — VJ 4-Way Ceiling Mounted Cassette Type Unit ...

SiUS34-907 External Appearance General Information 3 2. External Appearance 2.1 Indoor Units 2.2 Outdoor Units Ceiling-mounted cassette type (Multi flow) FXFQ12MVJUFXFQ18MVJUFXFQ24MVJUFXFQ30MVJUFXFQ36MVJU Ceiling suspended type FXHQ12MVJUFXHQ24MVJUFXHQ36MVJU 4-way ceiling mounted cassette unit (2’×2...

Capacity Range SiUS34-907 4 General Information 3. Capacity Range Outdoor Units Indoor Units Model RXYMQ Capacity Range 3 ton 4 ton Capacity Index 36P 48P No of Indoor Units to be Connected 6 8 Total Capacity Index of Indoor Units to be Connected 18~46.8 24~62.4 Capacity Range 0.6ton 0.8ton 1ton 1.5...

SiUS34-907 Specifications 5 Part 2 Specifications 1. Specifications .............................................................................................. 6 1.1 Outdoor Units ............................................................................................... 6 1.2 Indoor Units .....

SiUS34-907 Specifications Specifications 9 4 Way Ceiling Mounted Cassette Unit (2’×2’) Notes:  1 Nominal cooling capacities are based on the following conditions: Return air temperature: 80°FDB (27°CDB), 67°FWB (19.4°CWB)Outdoor temperature: 95°FDB (35°CDB) Equivalent ref. piping length: 25ft (7.5 ...

Specifications SiUS34-907 10 Specifications Slim Ceiling Mounted Duct Type Notes:  1 Nominal cooling capacities are based on the following conditions: Return air temperature: 80°FDB (27°CDB), 67°FWB (19.4°CWB)Outdoor temperature: 95°FDB (35°CDB) Equivalent ref. piping length: 25ft (7.5 m), (Horizon...

Specifications SiUS34-907 12 Specifications Ceiling Mounted Duct Type Notes:  1 Nominal cooling capacities are based on the following conditions: Return air temperature: 80°FDB (27°CDB), 67°FWB (19.4°CWB)Standard external static pressureOutdoor temperature: 95°FDB (35°CDB) Equivalent ref. piping le...

SiUS34-907 Specifications Specifications 15 Ceiling Suspended Type Notes:  1 Nominal cooling capacities are based on the following conditions: Return air temperature: 80°FDB (27°CDB), 67°FWB (19.4°CWB)Outdoor temperature: 95°FDB (35°CDB) Equivalent ref. piping length: 25ft (7.5 m), (Horizontal)  2...

Specifications SiUS34-907 18 Specifications Floor Standing Type Notes:  1 Nominal cooling capacities are based on the following conditions: Return air temperature: 80°FDB (27°CDB), 67°FWB (19.4°CWB)Outdoor temperature: 95°FDB (35°CDB) Equivalent ref. piping length: 25ft (7.5 m), (Horizontal)  2 No...

SiUS34-907 Specifications Specifications 19 Concealed Floor Standing Type Notes:  1 Nominal cooling capacities are based on the following conditions: Return air temperature: 80°FDB (27°CDB), 67°FWB (19.4°CWB)Outdoor temperature: 95°FDB (35°CDB) Equivalent ref. piping length: 25ft (7.5 m), (Horizont...

SiUS34-907 20 List of Electrical and Functional Parts Part 3 List of Electrical and Functional Parts 1. List of Electrical and Functional Parts ....................................................... 21 1.1 Outdoor Unit ...................................................................................

SiUS34-907 List of Electrical and Functional Parts List of Electrical and Functional Parts 21 1. List of Electrical and Functional Parts 1.1 Outdoor Unit Item Name Symbol Model Remark (PCB terminal) RXYMQ-PVJU Compressor Inverter Type M1C JT100G-VDL@T Relay Output 2.2kW A1P X102A Crankcase heater (I...

List of Electrical and Functional Parts SiUS34-907 22 List of Electrical and Functional Parts 1.2 Indoor Unit Parts Name Symbol Model Remark FXFQ 12MVJU FXFQ 18MVJU FXFQ 24MVJU FXFQ 30MVJU FXFQ 36MVJU RemoteController Wired Remote Controller BRC1C71 Option Wireless Remote Controller BRC7C812 Motors ...

SiUS34-907 26 Refrigerant Circuit Part 4 Refrigerant Circuit 1. Refrigerant Circuit ..................................................................................... 27 1.1 RXYMQ36 · 48P ......................................................................................... 27 2. Functional Pa...

SiUS34-907 Refrigerant Circuit Refrigerant Circuit 27 1. Refrigerant Circuit 1.1 RXYMQ36 · 48P No. in refrigerant system diagram Symbol Name Major Function A M1C Inverter compressor (INV.) Inverter compressor is operated on frequencies between 36Hz and 195Hz by using the inverter.31 steps D M1FM2F I...

SiUS34-907 Functional Parts Layout Refrigerant Circuit 29 2. Functional Parts Layout 2.1 RXYMQ36 · 48P THERMISTOR (SUCTION 2) R5T (MARKING COLOR:GREEN) S1PH PRESSURE SWITCH FOUR WAY VALVE FOUR WAY VALVE LEAD WIRE

SiUS34-907 30 Function Part 5 Function 1. Operation Mode ........................................................................................ 312. Basic Control ............................................................................................. 32 2.1 Normal Operation ....................

Basic Control SiUS34-907 32 Function 2. Basic Control 2.1 Normal Operation  Cooling Operation  Heating Operation  Heating operation is not functional at an outdoor air temperature of 75 ° FDB or more. Actuator Operation Remarks Compressor Compressor PI control Used for high pressure protection co...

SiUS34-907 Basic Control Function 33 2.2 Compressor PI Control Compressor PI Control Carries out the compressor capacity PI control to maintain Te at constant during cooling operation and Tc at constant during heating operation to ensure stable unit performance. [Cooling operation] [Heating operatio...

Basic Control SiUS34-907 34 Function 2.3 Electronic Expansion Valve PI Control Main Electronic Expansion Valve EV1 Control Carries out the electronic expansion valve (Y1E) PI control to maintain the evaporator outlet superheated degree (SH) at constant during heating operation to make maximum use of...

SiUS34-907 Basic Control Function 35 2.4 Cooling Operation Fan Control In cooling operation with low outdoor air temperature, this control is used to provide the adequate amount of circulation air with liquid pressure secured by high pressure control using the outdoor unit fan.When the outdoor tempe...

Special Control SiUS34-907 36 Function 3. Special Control 3.1 Startup Control This control is used to equalize the pressure in the front and back of the compressor prior to the startup of the compressor, thus reducing startup loads. The inverter is turned ON to charge the capacitor.In addition, to a...

SiUS34-907 Special Control Function 37 3.2 Oil Return Operation In order to prevent the compressor from running out of oil, the oil return operation is conducted to recover oil flown out from the compressor to the system side. 3.2.1 Oil Return Operation in Cooling Operation [Start conditions] Referr...

Special Control SiUS34-907 38 Function 3.2.2 Oil Return Operation in Heating Operation [Conditions to start] The heating oil-returning operation is started referring following conditions.  Integrated amount of displaced oil  Timer(After the power is turned on, integrated operating-time is 2 hours ...

SiUS34-907 Special Control Function 39 3.3 Defrosting Operation The defrost operation is performed to solve frost on the outdoor unit heat exchanger when heating, and the heating capacity is recovered. [Conditions to start] The defrost operation is started referring following conditions.  Outdoor h...

Special Control SiUS34-907 40 Function 3.4 Pump Down Residual Operation When activating compressor, if the liquid refrigerant remains in the heatexchanger, the liquid enters into the compressor and dilutes oil therein resulting in decrease of lubricity.Therefore, the pump down residual operation is ...

SiUS34-907 Special Control Function 41 3.5 Restart Standby Restart is stood by force to prevent frequent power-on/off and to equalize pressure in the refrigerant system. 3.6 Stopping Operation Operation of the actuator when the system is down, is cleared up. 3.6.1 When System is in Stop Mode Actuato...

Protection Control SiUS34-907 42 Function 4. Protection Control 4.1 High Pressure Protection Control This high-pressure protection control is used to prevent the activation of protection devices due to abnormal increase of high pressure and to protect compressors against the transient increase of hi...

SiUS34-907 Protection Control Function 43 4.2 Low Pressure Protection Control This low pressure protection control is used to protect compressors against the transient decrease of low pressure. [In cooling operation] [In heating operation] Pe<36.3 psi 36Hz Unload Pe>56.6 psi Pe<10.2 psi Lo ...

Protection Control SiUS34-907 44 Function 4.3 Discharge Pipe Protection Control This discharge pipe protection control is used to protect the compressor internal temperature against a malfunction or transient increase of discharge pipe temperature. [INV. compressor] In discharge pipe temp. protectio...

SiUS34-907 Protection Control Function 45 4.4 Inverter Protection Control Inverter current protection control and inverter fin temperature control are performed to prevent tripping due to a malfunction, or transient inverter overcurrent, and fin temperature increase. [Inverter overcurrent protection...

Other Control SiUS34-907 46 Function 5. Other Control 5.1 Demand Operation In order to save the power consumption, the capacity of outdoor unit is saved with control forcibly by using “Demand 1 Setting”.To operate the unit with this mode, additional setting of “Continuous Demand Setting”. [Demand 1 ...

SiUS34-907 Outline of Control (Indoor Unit) Function 47 6.1.2 When the Float Switch is Tripped while the Cooling Thermostat is OFF: *3. (Malfunction residual):The remote controller will display "A3" and the air conditioner will come to an abnormal stop if the float switch is turned OFF and n...

Outline of Control (Indoor Unit) SiUS34-907 48 Function 6.1.4 When the Float Switch is Tripped and “ AF ” is Displayed on the Remote Controller: *4. (Malfunction residual):If the float switch is tripped five times in succession, a drain malfunction is determined to have occurred. “AF” is then displa...

SiUS34-907 Outline of Control (Indoor Unit) Function 49 6.2 Louver Control for Preventing Ceiling Dirt We have added a control feature that allows you to select the range of in which air direction can be adjusted in order to prevent the ceiling surrounding the air discharge outlet of ceiling mounted...

Outline of Control (Indoor Unit) SiUS34-907 50 Function 6.3 Thermostat Sensor in Remote Controller Temperature is controlled by both the thermostat sensor in remote controller and air suction thermostat in the indoor unit. (This is however limited to when the field setting for the thermostat sensor ...

SiUS34-907 Outline of Control (Indoor Unit) Function 51 Heating When heating, the hot air rises to the top of the room, resulting in the temperature being lower near the floor where the occupants are. When controlling by body thermostat sensor only, the unit may therefore be turned off by the thermo...

Outline of Control (Indoor Unit) SiUS34-907 52 Function 6.4 Freeze Prevention Freeze Prevention by Off Cycle (Indoor Unit) When the temperature detected by liquid pipe temperature thermistor (R2T) of the indoor unit heat exchanger drops too low, the unit enters freeze prevention operation in accorda...

SiUS34-907 Outline of Control (Indoor Unit) Function 53 6.5 View of Operations of Swing Flaps Swing flaps work as following. Fan Flap control FCQ FHQ FAQ H eati n g Hot-start from defrosting Swinging OFF Level Level Level Setting the wind direction OFF Level Level Level Defrosting Swinging OFF Level...

SiUS34-907 54 Test Operation Part 6 Test Operation 1. Test Operation .......................................................................................... 55 1.1 Procedure and Outline ............................................................................... 55 1.2 Operation when Power is ...

SiUS34-907 Test Operation Test Operation 55 1. Test Operation 1.1 Procedure and Outline Follow the following procedure to conduct the initial test operation after installation. 1.1.1 Check Work Prior to Turn Power Supply On 1.1.2 Turn Power On w items Is the po w er s u pply single-phase 20 8 -230 V...

SiUS34-907 Test Operation Test Operation 57 1.1.4 Confirmation on Normal Operation • Conduct normal unit operation after the check operation has been completed.(When outdoor air temperature is 75°FDB or higher, the unit can not be operated with heating mode. See the installation manual attached.) • ...

Outdoor Unit PCB Layout SiUS34-907 58 Test Operation 2. Outdoor Unit PCB Layout Outdoor unit PCB Caution Cover electric parts with an insulating sheet during inspection to prevent electric shock.

SiUS34-907 Field Setting Test Operation 59 3. Field Setting 3.1 Field Setting from Remote Controller Individual function of indoor unit can be changed from the remote controller. At the time of installation or after service inspection / repair, make the local setting in accordance with the following...

Field Setting SiUS34-907 60 Test Operation 6 Press Menu/OK button. Setting confirmation screen is displayed. Select 7 Yes and press Menu/OK button. Setting details are determined and field settings screen returns. In the case of multiple setting 8 changes, repeat “ 3 ” to “ 7 ”. After all setting ch...

SiUS34-907 Field Setting Test Operation 65 3.1.6 Detailed Explanation of Setting Modes (1) Filter Sign Setting If switching the filter sign ON time, set as given in the table below. (2) Ultra Long Life Filter Sign Setting When a Ultra long - life filter is installed, the filter sign timer setting mu...

Field Setting SiUS34-907 66 Test Operation (6) External ON/OFF Input This input is used for "ON/OFF operation" and "Protection device input" from the outside. The input is performed from the T1-T2 terminal of the operation terminal block (X1A) in the electric component box. (7) Therm...

SiUS34-907 Field Setting Test Operation 67 (10) Auto Restart after Power Failure Reset For the air conditioners with no setting for the function (same as factory setting), the units will be left in the stop condition when the power supply is reset automatically after power failure reset or the main ...

Field Setting SiUS34-907 68 Test Operation (13) Airflow Direction Setting Set the airflow direction of indoor units as given in the table below. (Set when optional air outlet blocking pad has been installed.) The second code No. is factory setting to “01.” (14) Setting of Airflow Direction Adjustmen...

SiUS34-907 Field Setting Test Operation 69 3.1.7 Centralized Control Group No. Setting BRC1E Type In order to conduct the centralized remote control using the centralized remote controller and the unified ON/OFF controller, Group No. settings should be made by group using the operating remote contro...

SiUS34-907 Field Setting Test Operation 71 Group No. Setting Example Caution When turning the power supply on, the unit may often not accept any operation while "88" is displaying after all indications were displayed once for about 1 minute on the liquid crystal display. This is not an opera...

Field Setting SiUS34-907 72 Test Operation How to Select Operation Mode Whether operation by remote controller will be possible or not for turning on/off, controlling temperature or setting operation mode is selected and decided by the operation mode given on the right edge of the table below. Do no...

SiUS34-907 Field Setting Test Operation 73 3.2 Field Setting from Outdoor Unit 3.2.1 Setting by Dip Switches The following field settings are made by dip switches on PCB. Dipswitch Setting item Description No. Setting DS1-1 ON Cool / Heat change over setting Used to set cool / heat change over setti...

SiUS34-907 Field Setting Test Operation 81 Push the SET button and match with the LEDs No. 1 - 15, push the RETURN button, and confirm the data for each setting.  Data such as addresses and number of units is expressed as binary numbers; the two ways of expressing are as follows: The No. 1 cool/hea...

Field Setting SiUS34-907 84 Test Operation 3.2.3 Setting of Low Noise Operation and Demand Operation Setting of Low Noise Operation By connecting the external contact input to the low noise input of the outdoor unit external control adaptor (optional), you can lower operating noise by 2-3 dB. When t...

SiUS34-907 Field Setting Test Operation 85 Setting of Demand Operation By connecting the external contact input to the demand input of the outdoor unit external control adaptor (optional), the power consumption of unit operation can be saved suppressing the compressor operating condition. When the n...

SiUS34-907 Field Setting Test Operation 87 3.2.4 Setting of Refrigerant Additional Charging Operation * When the outdoor unit is stopped and the entire quantity of refrigerant cannot be charged from the stop valve on the liquid side, make sure to charge the remaining quantity of refrigerant using th...

Field Setting SiUS34-907 88 Test Operation 3.2.5 Setting of Refrigerant Recovery Mode When carrying out the refrigerant collection on site, fully open the respective expansion valve of indoor and outdoor units.All indoor and outdoor unit’s operation are prohibited. [Operation procedure]  In “Settin...

SiUS34-907 90 Troubleshooting Part 7 Troubleshooting 1. Symptom-based Troubleshooting ............................................................. 922. Troubleshooting by Remote Controller ..................................................... 95 2.1 Self-diagnosis by Wired Remote Controller ..........

SiUS34-907 Troubleshooting by Remote Controller Troubleshooting 95 2. Troubleshooting by Remote Controller On power-up, the message Checking the connection. Please stand by . is displayed on the remote controller screen. Then that message is no longer displayed and the basic screen displays. . To ac...

Troubleshooting by Remote Controller SiUS34-907 96 Troubleshooting 2.1 Self-diagnosis by Wired Remote Controller The following will be displayed on the screen when a error (or a warning) occurs during operation.Check the error code and take the corrective action specified for the particular model. (...

SiUS34-907 Troubleshooting by Remote Controller Troubleshooting 97 2.2 Self-diagnosis by Wireless Remote Controller In the Case of BRC7C Type / BRC7E Type / BRC4C Type If equipment stops due to a malfunction, the operation indicating LED on the light reception section flashes.The malfunction code ca...

SiUS34-907 Troubleshooting by Remote Controller Troubleshooting 99 2.3 Remote Controller Maintenance Mode How to Enter the Maintenance Mode Maintenance Mode Operation Method 1. Select the mode No. Select the desired item from the Maintenance menu, and then press Menu/OK button. 2. Select the Item 2....

Troubleshooting by Remote Controller SiUS34-907 102 Troubleshooting 2.4 Remote Controller Self-Diagnosis Function The following will be displayed on the screen when a error (or a warning) occurs during operation.Check the error code and take the corrective action specified for the particular model. ...

SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting 109 3. Troubleshooting by Indication on the Remote Controller 3.1 “ A0 ” Error of External Protection Device Remote Controller Display A0 Applicable Models All indoor unit models Method of Malfunction Detection Detect ...

Troubleshooting by Indication on the Remote Controller SiUS34-907 110 Troubleshooting 3.2 “ A1 ” PCB Defect Remote Controller Display A1 Applicable Models All indoor unit models Method of Malfunction Detection Check data from E²PROM. Malfunction Decision Conditions When data could not be correctly r...

SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting 111 3.3 “ A3 ” Malfunction of Drain Level Control System (S1L) Remote Controller Display A3 Applicable Models FXFQ, FXMQ, FXDQFXHQ (Option), FXAQ (Option) Method of Malfunction Detection By float switch OFF detection M...

SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting 115 “ A6 ” Malfunction of Indoor Unit Fan Motor Remote Controller Display A6 Applicable Models FXHQ, FXDQ Method of Malfunction Detection This malfunction is detected if there is no revolutions detection signal output ...

SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting 121 3.6 “ A9 ” Malfunction of Moving Part of Electronic Expansion Valve (Y1E) Remote Controller Display A9 Applicable Models All indoor unit models Method of Malfunction Detection Check coil condition of electronic exp...

SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting 123 3.7 “ AF ” Drain Level above Limit Remote Controller Display AF Applicable Models FXMQ, FXDQ Method of Malfunction Detection Water leakage is detected based on float switch ON/OFF operation while the compressor is ...

Troubleshooting by Indication on the Remote Controller SiUS34-907 124 Troubleshooting 3.8 “ AJ ” Malfunction of Capacity Determination Device Remote controller display AJ Applicable Models All indoor unit models Method of Malfunction Detection Capacity is determined according to resistance of the ca...

SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting 125 3.9 “ C4 ” Malfunction of Thermistor (R2T) for Heat Exchanger Remote Controller Display C4 Applicable Models All indoor unit models Method of Malfunction Detection Malfunction detection is carried out by temperatur...

Troubleshooting by Indication on the Remote Controller SiUS34-907 126 Troubleshooting 3.10 “ C5 ” Malfunction of Thermistor (R3T) for Gas Pipe Remote Controller Display C5 Applicable Models All indoor unit models Method of Malfunction Detection Malfunction detection is carried out by temperature det...

SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting 127 3.11 “ C9 ” Malfunction of Thermistor (R1T) for Suction Air Remote Controller Display C9 Applicable Models All indoor unit models Method of Malfunction Detection Malfunction detection is carried out by temperature ...

Troubleshooting by Indication on the Remote Controller SiUS34-907 128 Troubleshooting 3.12 “ CJ ” Malfunction of Thermostat Sensor in Remote Controller Remote Controller Display CJ Applicable Models All indoor unit models Method of Malfunction Detection Malfunction detection is carried out by temper...

Troubleshooting by Indication on the Remote Controller SiUS34-907 130 Troubleshooting 3.14 “ E3 ” Actuation of High Pressure Switch Remote Controller Display E3 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Abnormality is detected when the contact of the high pressure protection...

SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting 133 3.15 “ E4 ” Actuation of Low Pressure Sensor Remote Controller Display E4 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Abnormality is detected by the pressure value with the low pressure senso...

SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting 135 3.16 “ E5 ” Inverter Compressor Motor Lock Remote Controller Display E5 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Inverter PCB takes the position signal from UVW line connected between the ...

Troubleshooting by Indication on the Remote Controller SiUS34-907 138 Troubleshooting 3.17 “ E7 ” Malfunction of Outdoor Unit Fan Motor Remote Controller Display E7 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Detect a malfunction based on the current value in the inverter PCB ...

SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting 143 3.19 “ F3 ” Abnormal Discharge Pipe Temperature (R2T) Remote Controller Display F3 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Abnormality is detected according to the temperature detected by...

SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting 145 3.20 “ F6 ” Refrigerant Overcharged Remote Controller Display F6 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Excessive charging of refrigerant is detected by using the outside air temperature...

Troubleshooting by Indication on the Remote Controller SiUS34-907 146 Troubleshooting 3.21 “ H9 ” Malfunction of Thermistor (R1T) for Outdoor Air Remote Controller Display H9 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Malfunction is detected from the temperature detected by t...

SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting 147 3.22 “ J3 ” Malfunction of Discharge Pipe Thermistor (R2T) Remote Controller Display J3 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Malfunction is detected from the temperature detected by di...

SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting 149 3.24 “ J6 ” Malfunction of Thermistor (R4T) for Outdoor Unit Heat Exchanger Remote Controller Display J6 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Malfunction is detected from the temperatu...

Troubleshooting by Indication on the Remote Controller SiUS34-907 150 Troubleshooting 3.25 “ J7 ” Malfunction of Thermistor (R7T) for Outdoor Unit Liquid Pipe Remote Controller Display J7 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Malfunction is detected from the temperature ...

SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting 151 3.26 “ J9 ” Malfunction of Subcooling Heat Exchanger Gas Pipe Thermistor (R6T) Remote Controller Display J9 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Malfunction is detected according to th...

Troubleshooting by Indication on the Remote Controller SiUS34-907 152 Troubleshooting 3.27 “ JA ” Malfunction of High Pressure Sensor Remote Controller Display JA Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Malfunction is detected from the pressure detected by the high pressur...

Troubleshooting by Indication on the Remote Controller SiUS34-907 154 Troubleshooting 3.28 “ JC ” Malfunction of Low Pressure Sensor Remote Controller Display JC Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Malfunction is detected from pressure detected by low pressure sensor. ...

SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting 157 3.29 “ L1 ” Malfunction of PCB Remote Controller Display L1 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Malfunction is detected based on the current value during waveform output before starti...

SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting 159 3.30 “ L4 ” Malfunction of Inverter Radiation Fin Temperature Rise Remote Controller Display L4 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Fin temperature is detected by the thermistor of th...

Troubleshooting by Indication on the Remote Controller SiUS34-907 162 Troubleshooting 3.31 “ L5 ” Inverter Compressor Abnormal Remote Controller Display L5 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Malfunction is detected from current flowing in the power transistor. Malfunc...

Troubleshooting by Indication on the Remote Controller SiUS34-907 164 Troubleshooting 3.32 “ L8 ” Inverter Current Abnormal Remote Controller Display L8 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Malfunction is detected by current flowing in the power transistor. Malfunction ...

Troubleshooting by Indication on the Remote Controller SiUS34-907 166 Troubleshooting 3.33 “ L9 ” Inverter Compressor Start up Error Remote Controller Display L9 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Detect the failure based on the signal waveform of the compressor. Malf...

SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting 169 3.34 “ P1 ” High Voltage of Capacitor in Main Inverter Circuit Remote Controller Display P1 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Imbalance in supply voltage is detected in PCB. Malfunc...

SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting 171 3.35 “ P4 ” Malfunction of Inverter Radiating Fin Temperature Rise Sensor Remote Controller Display P4 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Resistance of radiation fin thermistor is de...

SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting 173 3.36 “ U0 ” Low Pressure Drop Due to Refrigerant Shortage or Electronic Expansion Valve Failure Remote Controller Display U0 Applicable Models RXYMQ36 · 48PVJU Malfunction Decision Conditions [In cooling mode]Low p...

SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting 175 3.37 “ U2 ” Power Supply Insufficient or Instantaneous Failure Remote Controller Display U2 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Detection of voltage of main circuit capacitor built in...

Troubleshooting by Indication on the Remote Controller SiUS34-907 178 Troubleshooting 3.38 “ U3 ” Check Operation is not Executed Remote Controller Display U3 Applicable Models RXYMQ36 · 48PVJU Method of Malfunction Detection Check operation is executed or not Malfunction Decision Conditions Malfunc...

SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting 179 3.39 “ U4 ” Malfunction of Transmission between Indoor Units and Outdoor Units Remote Controller Display U4 Applicable Models All indoor unit modelsRXYMQ36 · 48PVJU Method of Malfunction Detection Micro-computer ch...

SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting 183 3.40 “ U5 ” Malfunction of Transmission between Remote Controller and Indoor Unit Remote Controller Display U5 Applicable Models All indoor unit models Method of Malfunction Detection If controlling with 2remote co...

SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting 185 3.41 “ U8 ” Malfunction of Transmission between Main and Sub Remote Controllers Remote Controller Display U8 Applicable Models All indoor unit models Method of Malfunction Detection If controlling with 2remote cont...

SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting 187 3.43 “ UA ” Improper Combination of Indoor and Outdoor Units etc. Remote Controller Display UA Applicable Models All indoor unit models Method of Malfunction Detection A difference occurs in data by the type of ref...

Troubleshooting by Indication on the Remote Controller SiUS34-907 190 Troubleshooting 3.44 “ UC ” Address Duplication of Centralized Remote Controller Remote Controller Display UC Applicable Models All indoor unit models Method of Malfunction Detection The principal indoor unit detects the same addr...

SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting 191 3.45 “ UE ” Malfunction of Transmission between Centralized Remote Controller and Indoor Unit Remote Controller Display UE Applicable Models All indoor unit modelsCentralized remote controller, intelligent Touch Co...

Troubleshooting by Indication on the Remote Controller SiUS34-907 194 Troubleshooting 3.46 “ UF ” System is not Set yet Remote Controller Display UF Applicable Models All indoor unit modelsRXYMQ36 · 48PVJU Method of Malfunction Detection On check operation, the number of indoor units in terms of tra...

SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting 195 3.47 “ UH ” Malfunction of System, Refrigerant System Address Undefined Remote Controller Display UH Applicable Models All indoor unit modelsRXYMQ36 · 48PVJU Method of Malfunction Detection Detect an indoor unit wi...

Troubleshooting (OP: Centralized Remote Controller) SiUS34-907 198 Troubleshooting 4.2 “ M8 ” Malfunction of Transmission between Optional Controllers for Centralized Control Remote Controller Display M8 Applicable Models Centralized remote controller / intelligent Touch ControllerSchedule timer Met...

Troubleshooting (OP: Centralized Remote Controller) SiUS34-907 200 Troubleshooting 4.3 “ MA ” Improper Combination of Optional Controllers for Centralized Control Remote Controller Display MA Applicable Models Centralized remote controller / intelligent Touch ControllerSchedule timer Method of Malfu...

Troubleshooting (OP: Centralized Remote Controller) SiUS34-907 202 Troubleshooting 4.4 “ MC ” Address Duplication, Improper Setting Remote Controller Display MC Applicable Models Centralized remote controller / intelligent Touch ControllerSchedule timer Method of Malfunction Detection Detect the mal...

Troubleshooting (OP: Unified ON/OFF Controller) SiUS34-907 204 Troubleshooting 5. Troubleshooting (OP: Unified ON/OFF Controller) 5.1 Operation Lamp Blinks Remote Controller Display Operation lamp blinks Applicable Models All model of indoor unitsUnified ON/OFF controller Method of Malfunction Detec...

SiUS34-907 222 Appendix Part 8 Appendix 1. Piping Diagrams ...................................................................................... 223 1.1 Outdoor Unit ............................................................................................. 223 1.2 Indoor Unit ......................

SiUS34-907 Piping Diagrams Appendix 225 FXZQ  Refrigerant pipe connection port diameters FXDQ  Refrigerant pipe connection port diameters 4D040157 (in) Model Gas Liquid FXZQ07 / 09 / 12 / 18MVJU φ 1/2 φ 1/4 4D043864M (in) Model Gas Liquid FXDQ07 / 09 / 12 / 18MVJU φ 1/2 φ 1/4 FXDQ24MVJU φ 5/8 φ 3/...

Wiring Diagrams SiUS34-907 228 Appendix 2.2 Field Wiring RXYMQ36 / 48PVJU 3D065370

Option List SiUS34-907 236 Appendix 3. Option List 3.1 Option List of Controllers Optional Accessories of Operation Control System C:3D043022D Notes: 1. Installation box (No.4) is necessary for each adaptor marked  . 2. Electrical box (5-1/6-1) is required for controller (No. 5/6). Building managem...

SiUS34-907 Option List Appendix 237 3.2 Option List of Outdoor Unit RXYQM36 · 48MVJU C: 3D047388B Optional accessories RXYMQ36MVJU, RXM48MVJU Cool/Heat Selector KRC19-26A Fixing box KJB111A Distr ib u ti v e P ipi ng REFNET header KHRP26M22H, KHRP26M33H (MAX. 4 branch) (MAX. 8 branch) REFNET joint K...

SiUS34-907 Appendix 4. Example of Connection Example of connection (Connection of 8 indoor units Heat Pump system) Branch with REFNET joint Branch with REFNET joint and REFNET header Branch with REFNET header ab c d e f g hi j k l m n 12 34 56 7 8 H2 H1 p Outdoor unit REFNET joint (A-G) Indoor units...

SiUS34-907 Thermistor Resistance / Temperature Characteristics Appendix 241 5. Thermistor Resistance / Temperature Characteristics Indoor unit For air suction R1T For liquid pipe R2T For gas pipe R3T Outdoor unit For outdoor air R1T For suction pipe 1 R3T For heat exchanger R4T For suction pipe 2 R5...

Thermistor Resistance / Temperature Characteristics SiUS34-907 242 Appendix Outdoor Unit Thermistors for Discharge Pipe (R2T) T°F T°C k Ω T°F T°C k Ω T°F T°C k Ω 32.0 0 640.44 122.0 50 72.32 212.0 100 13.35 33.8 1 609.31 123.8 51 69.64 213.8 101 12.95 35.6 2 579.96 125.6 52 67.06 215.6 102 12.57 37....

SiUS34-907 244 Precautions for New Refrigerant (R-410A) Part 9 Precautions for New Refrigerant (R-410A) 1. Precautions for New Refrigerant (R-410A) ............................................. 245 1.1 Outline .............................................................................................

SiUS34-907 Precautions for New Refrigerant (R-410A) Precautions for New Refrigerant (R-410A) 245 1. Precautions for New Refrigerant (R-410A) 1.1 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. Pressu...

SiUS34-907 Precautions for New Refrigerant (R-410A) Precautions for New Refrigerant (R-410A) 247 1.2 Refrigerant Cylinders  Cylinder specifications • The cylinder is painted refrigerant color (pink). • The cylinder valve is equipped with a siphon tube.  Handling of cylinders (1) Laws and regulatio...

Precautions for New Refrigerant (R-410A) SiUS34-907 248 Precautions for New Refrigerant (R-410A) 1.3 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,...

1645 Wallace Drive, Suite 110 Carrollton, TX75006 [email protected] www.daikinac.com AMERICAS dddddfdf ISO 9001 is a plant certification systemdefined by the International Organizationfor Standardization (ISO) relating to quality assurance. ISO 9001 certificationcovers quality assurance aspects rela...