Page 1 SiUS34-907 RXYMQ36·48PVJU R-410A Heat Pump 60Hz...
Page 2: Table Of Contents
SiUS34-907 R-410A Heat Pump 60Hz 1. Introduction ....................v 1.1 Safety Considerations for Repair ..............v 1.2 Safety Considerations for Users..............vi Part 1 General Information .............. 1 1. Model Names of Indoor/Outdoor Units............2 2. External Appearance...................3 2.1 Indoor Units ....................3 2.2 Outdoor Units ....................
Page 3 SiUS34-907 3.4 Pump Down Residual Operation ..............40 3.5 Restart Standby..................41 3.6 Stopping Operation ..................41 4. Protection Control ..................42 4.1 High Pressure Protection Control............... 42 4.2 Low Pressure Protection Control..............43 4.3 Discharge Pipe Protection Control ............. 44 4.4 Inverter Protection Control .................
Page 4 SiUS34-907 3.11 “C9” Malfunction of Thermistor (R1T) for Suction Air ........ 127 3.12 “CJ” Malfunction of Thermostat Sensor in Remote Controller....128 3.13 “E1” PCB Defect..................129 3.14 “E3” Actuation of High Pressure Switch ............ 130 3.15 “E4” Actuation of Low Pressure Sensor ............ 133 3.16 “E5”...
Page 5 SiUS34-907 4.2 “M8” Malfunction of Transmission between Optional Controllers for Centralized Control..........198 4.3 “MA” Improper Combination of Optional Controllers for Centralized Control................... 200 4.4 “MC” Address Duplication, Improper Setting ..........202 5. Troubleshooting (OP: Unified ON/OFF Controller) .........204 5.1 Operation Lamp Blinks ................204 5.2 Display “Under Centralized Control”...
Page 6: Safety Considerations
Safety Considerations SiUS34-907 1. Safety Considerations Read these SAFETY CONSIDERATIONS carefully before • If refrigerant gas is discharged during repair work, do performing any repair work. Comply with these safety symbols not touch the discharged refrigerant gas. The without fail. refrigerant gas may cause frostbite.
Page 7 SiUS34-907 Safety Considerations may generate toxic gases if it comes into contact with • Check the unit foundation for damage on a continual flames. basis, especially if it has been in use for a long time. If left in a damaged condition, the unit may fall and •...
Page 8 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 confident that customers will be able to find the models that best suit their needs.
Page 9 SiUS34-907 Safety Considerations viii...
Page 10: Part 1 General Information
SiUS34-907 Part 1 General Information 1. Model Names of Indoor/Outdoor Units............2 2. External Appearance...................3 2.1 Indoor Units ....................3 2.2 Outdoor Units ....................3 3. Capacity Range................... 4 General Information...
Page 11: Model Names Of Indoor/Outdoor Units
Model Names of Indoor/Outdoor Units SiUS34-907 1. Model Names of Indoor/Outdoor Units Indoor Units Type Model Name Power Supply Ceiling Mounted FXFQ — — — Cassette Type (Multi Flow) 4-Way Ceiling Mounted FXZQ — — — — Cassette Type Unit (2’...
Page 12: External Appearance
SiUS34-907 External Appearance 2. External Appearance Indoor Units Ceiling-mounted cassette type (Multi flow) Ceiling suspended type FXFQ12MVJU FXHQ12MVJU FXFQ18MVJU FXHQ24MVJU FXFQ24MVJU FXHQ36MVJU FXFQ30MVJU FXFQ36MVJU 4-way ceiling mounted cassette Wall mounted type unit (2’×2’) FXAQ07MVJU FXAQ09MVJU FXZQ07M7 FXAQ12MVJU FXZQ09M7 FXAQ18MVJU FXZQ12M7 FXAQ24MVJU FXZQ18M7 Slim ceiling-mounted duct...
Page 13: Capacity Range
Capacity Range SiUS34-907 3. Capacity Range Outdoor Units Model RXYMQ Capacity Range 3 ton 4 ton Capacity Index No of Indoor Units to be Connected Total Capacity Index of Indoor Units to be Connected 18~46.8 24~62.4 Indoor Units Capacity Range 0.6ton 0.8ton 1ton...
Page 14: Part 2 Specifications
SiUS34-907 Part 2 Specifications 1. Specifications ....................6 1.1 Outdoor Units ....................6 1.2 Indoor Units ....................7 Specifications...
Page 15: Specifications
Specifications SiUS34-907 1. Specifications Outdoor Units Heat Pump 60Hz <RXYMQ-PVJU> Model Name RXYMQ36PVJU RXYMQ48PVJU 1 Cooling Capacity Btu / h 36,000 48,000 2 Heating Capacity Btu / h 40,000 54,000 Casing Color Ivory White (5Y7.5/1) Ivory White (5Y7.5/1) Dimensions: (H×W×D) in.
Page 16: Indoor Units
SiUS34-907 Specifications Indoor Units Ceiling Mounted Cassette Type (Multi-flow) Model FXFQ12MVJU FXFQ18MVJU FXFQ24MVJU 1 Cooling Capacity Btu/h 12,000 18,000 24,000 2 Heating Capacity Btu/h 13,500 20,000 27,000 Casing / Color Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate 9-1/8 × 33-1/8 × 33-1/8 9-1/8 ×...
Page 17 Specifications SiUS34-907 Ceiling Mounted Cassette Type (Multi-flow) Model FXFQ30MVJU FXFQ36MVJU 1 Cooling Capacity Btu/h 30,000 36,000 2 Heating Capacity Btu/h 34,000 40,000 Casing / Color Galvanized Steel Plate Galvanized Steel Plate Dimensions: (H×W×D) in. (mm) 11-3/8 × 33-1/8 × 33-1/8 (289 x 841 x 841) 11-3/8 ×...
Page 18 SiUS34-907 Specifications 4 Way Ceiling Mounted Cassette Unit (2’×2’) Model FXZQ07M7VJU FXZQ09M7VJU FXZQ12M7VJU FXZQ18M7VJU 1 Cooling Capacity Btu/h 7,500 9,500 12,000 18,000 2 Heating Capacity Btu/h 8,700 11,100 14,000 21,000 Galvanized Steel / Non Galvanized Steel / Non Galvanized Steel / Non Galvanized Steel / Non Casing / Color Painted...
Page 19 Specifications SiUS34-907 Slim Ceiling Mounted Duct Type Model FXDQ07MVJU FXDQ09MVJU FXDQ12MVJU 1 Cooling Capacity Btu/h 7,500 9,500 12,000 2 Heating Capacity Btu/h 8,500 10,500 13,500 Casing / Color Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate 7-7/8 × 27-9/16 × 24-7/16 7-7/8 ×...
Page 20 SiUS34-907 Specifications Slim Ceiling Mounted Duct Type Model FXDQ18MVJU FXDQ24MVJU 1 Cooling Capacity Btu/h 18,000 24,000 2 Heating Capacity Btu/h 20,000 27,000 Casing / Color Galvanized Steel Plate Galvanized Steel Plate Dimensions: (H×W×D) in. (mm) 7-7/8 × 35-7/16 × 24-7/16 (200 x 900 x 621) 7-7/8 ×...
Page 21 Specifications SiUS34-907 Ceiling Mounted Duct Type Model FXMQ07PVJU FXMQ09PVJU FXMQ12PVJU 1, 3 Cooling Capacity Btu/h 7,500 9,500 12,000 2, 3 Heating Capacity Btu/h 8,500 10,500 13,500 Casing / Color Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate 11-13/16 × 21-5/8 × 27-9/16 11-13/16 ×...
Page 22 SiUS34-907 Specifications Ceiling Mounted Duct Type Model FXMQ18PVJU FXMQ24PVJU FXMQ30PVJU 1, 3 Cooling Capacity Btu/h 18,000 24,000 30,000 2, 3 Heating Capacity Btu/h 20,000 27,000 34,000 Casing / Color Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate 11-13/16 × 39-3/8 × 27-9/16 11-13/16 ×...
Page 23 Specifications SiUS34-907 Ceiling Mounted Duct Type Model FXMQ36PVJU FXMQ48PVJU 1, 3 Cooling Capacity Btu/h 36,000 48,000 2, 3 Heating Capacity Btu/h 40,000 54,000 Casing / Color Galvanized Steel Plate Galvanized Steel Plate Dimensions: (H×W×D) in. (mm) 11-13/16 × 55-1/8 × 27-9/16 (300 x 1400 x 700) 11-13/16 ×...
Page 24: Ceiling Suspended Type
SiUS34-907 Specifications Ceiling Suspended Type Model FXHQ12MVJU FXHQ24MVJU FXHQ36MVJU 1 Cooling Capacity Btu/h 12,000 24,000 36,000 2 Heating Capacity Btu/h 13,500 27,000 40,000 Casing / Color White(10Y9/0.5) White(10Y9/0.5) White(10Y9/0.5) 7-11/16 × 37-13/16 × 26-3/4 7-11/16 × 55-1/8 × 26-3/4 7-11/16 × 62-5/8 × 26-3/4 Dimensions: (H×W×D) in.
Page 25 Specifications SiUS34-907 Wall Mounted Type Model FXAQ07MVJU FXAQ09MVJU FXAQ12MVJU 1 Cooling Capacity Btu/h 7,500 9,500 12,000 2 Heating Capacity Btu/h 8,500 10,500 13,500 Casing Color White (3.0Y8.5/0.5) White (3.0Y8.5/0.5) White (3.0Y8.5/0.5) Dimensions: (H×W×D) in. (mm) 11–3/8 × 31–1/4 × 9 (289 x 794 x 229) 11–3/8 ×...
Page 26 SiUS34-907 Specifications Wall Mounted Type Model FXAQ18MVJU FXAQ24MVJU 1 Cooling Capacity Btu/h 18,000 24,000 2 Heating Capacity Btu/h 20,000 27,000 Casing Color White (3.0Y8.5/0.5) White (3.0Y8.5/0.5) Dimensions: (H×W×D) in. (mm) 11–3/8 × 41–3/8 × 9 (289 x 1051 x 229) 11–3/8 ×...
Page 27: Floor Standing Type
Specifications SiUS34-907 Floor Standing Type Model FXLQ12MVJU FXLQ18MVJU FXLQ24MVJU 1 Cooling Capacity Btu/h 12,000 18,000 24,000 2 Heating Capacity Btu/h 13,500 20,000 27,000 Casing Color Ivory White (5Y7.5/1) Ivory White (5Y7.5/1) Ivory White (5Y7.5/1) 23–5/8 × 44–7/8 × 8–3/4 23–5/8 × 55-7/8 × 8–3/4 223–5/8 ×...
Page 28 SiUS34-907 Specifications Concealed Floor Standing Type Model FXNQ12MVJU FXNQ18MVJU FXNQ24MVJU 1 Cooling Capacity Btu/h 12,000 18,000 24,000 2 Heating Capacity Btu/h 13,500 20,000 27,000 Casing Color Galvanized Steel Plate Galvanized Steel Plate Galvanized Steel Plate 24 × 42–1/8 × 8–5/8 24 ×...
Page 29: Part 3 List Of Electrical And Functional Parts
SiUS34-907 Part 3 List of Electrical and Functional Parts 1. List of Electrical and Functional Parts ............21 1.1 Outdoor Unit ....................21 1.2 Indoor Unit....................22 List of Electrical and Functional Parts...
Page 30: List Of Electrical And Functional Parts
SiUS34-907 List of Electrical and Functional Parts 1. List of Electrical and Functional Parts Outdoor Unit Model Remark Item Name Symbol (PCB terminal) RXYMQ-PVJU Type JT100G-VDL@T Relay Inverter Compressor Output 2.2kW A1P X102A Crankcase heater (INV.) E1HC A1P X28A Motor M1F·M2F 0.07kW —...
Page 31: Indoor Unit
List of Electrical and Functional Parts SiUS34-907 Indoor Unit Model Parts Name Symbol Remark FXFQ FXFQ FXFQ FXFQ FXFQ 12MVJU 18MVJU 24MVJU 30MVJU 36MVJU Wired Remote BRC1C71 Controller Remote Option Controller Wireless Remote BRC7C812 Controller 1φ45W 6P 1φ90W 6P Fan Motor Thermal Protector 266±9°F : OFF 176±36°F : ON Capacitor, fan motor...
Page 32 SiUS34-907 List of Electrical and Functional Parts Model Parts Name Symbol Remark FXDQ FXDQ FXDQ FXDQ FXDQ 07MVJU 09MVJU 12MVJU 18MVJU 24MVJU Wired Remote BRC1C71 Controller Remote Option Controller Wireless Remote BRC4C82 Controller 1φ62W 4P 1φ130W 4P Fan Motor ± ±...
Page 33 List of Electrical and Functional Parts SiUS34-907 Model Parts Name Symbol Remark FXHQ FXHQ FXHQ 12MVJU 24MVJU 36MVJU Wired Remote BRC1C71 Remote Controller Option Controller Wireless Controller BRC7E83 1φ63W 1φ130W Fan Motor Thermal protector 266±9°F : OFF 176±36°F : ON Motors 3.0μF-450V 9.0μF-450V...
Page 34 SiUS34-907 List of Electrical and Functional Parts Model Parts Name Symbol Remark FXLQ FXLQ FXLQ 12MVJU 18MVJU 24MVJU Wired Remote BRC1C71 Controller Remote Option Controller Wireless Remote — Controller 1φ25W 1φ35W Fan Motor Motors Thermal protector 275°F : OFF 248°F : ON 0.5μF-450V 1.5μF-450V 2.0μF-450V...
Page 35: Part 4 Refrigerant Circuit
SiUS34-907 Part 4 Refrigerant Circuit 1. Refrigerant Circuit ..................27 1.1 RXYMQ36 · 48P..................27 2. Functional Parts Layout ................29 2.1 RXYMQ36 · 48P..................29 Refrigerant Circuit...
Page 36: Refrigerant Circuit
SiUS34-907 Refrigerant Circuit 1. Refrigerant Circuit RXYMQ36 · 48P No. in refrigerant Symbol Name Major Function system diagram Inverter compressor is operated on frequencies between 36Hz and 195Hz by using the Inverter compressor (INV.) inverter. 31 steps Because the system is of an air heat exchange type, the fan is operated at 8-step rotation Inverter fan speed by using the inverter.
Page 37 Refrigerant Circuit SiUS34-907 S1PH S1NPL C : 3D065366 Refrigerant Circuit...
Page 38: Functional Parts Layout
SiUS34-907 Functional Parts Layout 2. Functional Parts Layout RXYMQ36 · 48P FOUR WAY VALVE LEAD WIRE FOUR WAY VALVE THERMISTOR (SUCTION 2) (MARKING COLOR:GREEN) S1PH PRESSURE SWITCH Refrigerant Circuit...
Page 39: Part 5 Function
SiUS34-907 Part 5 Function 1. Operation Mode ..................31 2. Basic Control..................... 32 2.1 Normal Operation ..................32 2.2 Compressor PI Control................33 2.3 Electronic Expansion Valve PI Control............34 2.4 Cooling Operation Fan Control..............35 3. Special Control..................36 3.1 Startup Control ................... 36 3.2 Oil Return Operation ..................
Page 40: Operation Mode
SiUS34-907 Operation Mode 1. Operation Mode Operation in stop mode Indoor unit stop or Indoor unit thermostat ON thermostat OFF Malfunction/Standby Restart standby Pressure (Compressor stop) equalization prior to startup Malfunction/ Standby Indoor unit stop or thermostat OFF Startup control •...
Page 41: Basic Control
Basic Control SiUS34-907 2. Basic Control Normal Operation  Cooling Operation Actuator Operation Remarks Used for high pressure protection control, low pressure protection control, discharge pipe Compressor Compressor PI control temperature protection control, and compressor operating frequency upper limit control with inverter protection control.
Page 42: Compressor Pi Control
SiUS34-907 Basic Control 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] Controls compressor capacity to adjust Te to achieve Te : Low pressure equivalent saturation temperature (°F) target value (TeS).
Page 43: Electronic Expansion Valve Pi Control
Basic Control SiUS34-907 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 the outdoor unit heat exchanger (evaporator).
Page 44: Cooling Operation Fan Control
SiUS34-907 Basic Control 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 temperature ≥...
Page 45: Special Control
Special Control SiUS34-907 3. Special Control 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 avoid stresses to the compressor due to oil return or else after the startup, the following control is made and the position of the four-way valve is also determined.
Page 46: Oil Return Operation
SiUS34-907 Special Control 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] Referring to the set conditions for the following items, start the oil-return operation in cooling.
Page 47 Special Control SiUS34-907 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 and subsequently every 8 hours.) In addition, integrated amount of displaced oil is derived from Tc, Te, and the compressor load.
Page 48: Defrosting Operation
SiUS34-907 Special Control 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 heat exchanger heat transfer co-efficiency ...
Page 49: Pump-Down Residual Operation
Special Control SiUS34-907 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 performed to collect the refrigerant in the heatexchanger when the compressor is down.
Page 50: Restart Standby
SiUS34-907 Special Control Restart Standby Restart is stood by force to prevent frequent power-on/off and to equalize pressure in the refrigerant system. Actuator Operation Remarks ⎯ Compressor Ta>86°F: STEP 4 ⎯ Outdoor unit fan Ta≤86°F: OFF ⎯ Four-way valve (Y1S) Keep former condition.
Page 51: Protection Control
Protection Control SiUS34-907 4. Protection Control 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 high pressure. [In cooling operation] Pc>503 psi High pressure not limited...
Page 52: Low Pressure Protection Control
SiUS34-907 Protection Control Low Pressure Protection Control This low pressure protection control is used to protect compressors against the transient decrease of low pressure. [In cooling operation] Low pressure not limited Pe: Low-pressure sensor detection value Pe<36.3 psi Pe>56.6 psi Low pressure Hot gas SVP = OFF limited...
Page 53: Discharge Pipe Protection Control
Protection Control SiUS34-907 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] Discharge pipe protection HTdi :Value of INV. compressor discharge pipe control not limited temperature (Tdi) compensated with outdoor air temperature...
Page 54: Inverter Protection Control
SiUS34-907 Protection Control 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 control] Not limited •Inverter current ≤ 23.8A &...
Page 55: Other Control
Other Control SiUS34-907 5. Other Control 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 setting] Setting Standard for upper limit of power consumption...
Page 56 SiUS34-907 Outline of Control (Indoor Unit) 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 not turned ON again within 5 minutes while the cooling thermo.
Page 57 Outline of Control (Indoor Unit) SiUS34-907 6.1.4 When the Float Switch is Tripped and “ ” 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 displayed as operation continues.
Page 58: Louver Control For Preventing Ceiling Dirt
SiUS34-907 Outline of Control (Indoor Unit) 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 cassette type units from being soiled.
Page 59: Thermostat Sensor In Remote Controller
Outline of Control (Indoor Unit) SiUS34-907 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 in remote controller is set to “Use.”) Note: When OA (outdoor air) is introduced to the airconditioner with mixed into indoor air, the room temperature may...
Page 60 SiUS34-907 Outline of Control (Indoor Unit) 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 thermostat before the lower part of the room reaches the preset temperature.
Page 61: Freeze Prevention
Outline of Control (Indoor Unit) SiUS34-907 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 accordance with the following conditions, and is also set in accordance with the conditions given below.
Page 62: View Of Operations Of Swing Flaps
SiUS34-907 Outline of Control (Indoor Unit) View of Operations of Swing Flaps Swing flaps work as following. Flap control Swinging Level Level Level Hot-start from defrosting Setting the wind direction Level Level Level Swinging Level Level Level Defrosting Setting the wind direction Level Level Level...
Page 63: Part 6 Test Operation
SiUS34-907 Part 6 Test Operation 1. Test Operation ..................55 1.1 Procedure and Outline ................55 1.2 Operation when Power is Turned On ............57 2. Outdoor Unit PCB Layout................58 3. Field Setting ....................59 3.1 Field Setting from Remote Controller ............59 3.2 Field Setting from Outdoor Unit..............
Page 64: Test Operation
SiUS34-907 Test Operation 1. Test Operation 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 Is the power supply single-phase 208-230V / 60Hz? Check the below items. Have you finished a ductwork to drain? Power wiring •...
Page 65: Check Operation
Test Operation SiUS34-907 1.1.3 Check Operation * During check operation, mount front panel to avoid the misjudging. * Check operation is mandatory for normal unit operation. (When the check operation is not executed, alarm code "U3" will be displayed.) Press and hold the TEST ⎧...
Page 66: Operation When Power Is Turned On
SiUS34-907 Test Operation 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.) •...
Page 67: Outdoor Unit Pcb Layout
Outdoor Unit PCB Layout SiUS34-907 2. Outdoor Unit PCB Layout Outdoor unit PCB Caution Cover electric parts with an insulating sheet during inspection to prevent electric shock. Test Operation...
Page 68: Field Setting
SiUS34-907 Field Setting 3. Field Setting Field Setting from Remote Controller Individual function of indoor unit can be changed from the remote controller. At the time of installation or after service inspection / repair, make the local setting in accordance with the following description. Wrong setting may cause malfunction.
Page 69 Field Setting SiUS34-907 Press Menu/OK button. Setting confirmation screen is displayed. <Setting confirmation screen> Select and press Menu/OK button. Setting details are Field Settings determined and field settings Save the settings? screen returns. In the case of multiple setting changes, repeat “ ”...
Page 70 SiUS34-907 Field Setting 3.1.2 Wireless Remote Controller - Indoor Unit BRC7C812 BRC4C82 BRC7E818 BRC7E83 1. When in the normal mode, push the button for 4 seconds or more, and operation then enters the “field set mode.” 2. Select the desired “mode No.” with the button.
Page 71 Field Setting SiUS34-907 3.1.3 Simplified Remote Controller BRC2A51 BRC2C51 1. Remove the upper part of remote controller. 2. When in the normal mode, press the [BS6] BUTTON (O) (field set), and the FIELD SET MODE is entered.  3. Select the desired MODE No. with the [BS2] BUTTON (P) (temperature setting ) and the [BS3] BUTTON ...
Page 72 SiUS34-907 Field Setting 3.1.4 Setting Contents and Code No. – VRV Indoor unit : Factory setting Mode Second Code No. First Details Setting Contents Code Note 2 Approx. Approx. Ultra long-life 10,000 5,000 Filter contamination heavy/ filter hrs. hrs. light (Setting for display time to clean air filter) Approx.
Page 73 Field Setting SiUS34-907 3.1.5 Applicable Range of Field setting Ceiling mounted cassette Slim ceiling Ceiling Ceiling Wall mounted Floor Concealed type mounted duct mounted duct suspended type standing type floor standing type type type type Multi flow FXFQ FXZQ FXDQ FXMQ FXHQ FXAQ...
Page 74: Detailed Explanation Of Setting Modes
SiUS34-907 Field Setting 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. First Code Second Mode No. Standard Long Life Ultra Long Life Setting Code No. 200 hrs.
Page 75 Field Setting SiUS34-907 (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. F2 T1 T2 Forced stop Input A...
Page 76 SiUS34-907 Field Setting (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 power supply is turned on again after once turned off.
Page 77 Field Setting SiUS34-907 (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.” Mode No. First Code No.
Page 78 SiUS34-907 Field Setting 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 controller. Make Group No.
Page 79 Field Setting SiUS34-907 BRC7C Type / BRC7E Type / BRC4C Type  Group No. setting by wireless remote controller for centralized control 1. When in the normal mode, push “ ” button for 4 seconds or more, and operation then enters the “field set mode.”...
Page 80 SiUS34-907 Field Setting Group No. Setting Example Centralized Remote Controller Indoor/Outdoor Outdoor/Outdoor Indoor/Outdoor Outdoor/Outdoor F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 P1 P2 F1 F2 P1 P2 F1 F2 P1 P2 F1 F2 P1 P2 Group Control by Remote Controller Main 1-00...
Page 81 Field Setting SiUS34-907 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. Example ON by remote OFF by remote...
Page 82: Field Setting From Outdoor Unit
SiUS34-907 Field Setting 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 Setting Cool / Heat Used to set cool / heat change over setting by remote DS1-1 change over controller equipped with outdoor unit.
Page 83 Field Setting SiUS34-907 Caution DIP switch Setting after changing the main PCB(A1P) to spare parts PCB When you change the main PCB(A1P) to spare parts PCB, please carry out the following setting. Please Attach the Capacity Setting Adaptor corresponding to Capacity Class (ex. 112, 140, 160) in connector X51A. (See Below) Capacity Setting Adaptor Capacity Class...
Page 84 SiUS34-907 Field Setting  Setting by push button switches The following settings are made by push button switches on PCB. LED indication (Factory setting) MODE RETURN TEST RESET There are the following three setting modes.  Setting mode 1 (H1P off) Initial status (when normal) : Also indicates during “abnormal”.
Page 85 Field Setting SiUS34-907 a. “Setting mode 1” This mode is used to set and check the following items. 1. Set items ············ In order to make COOL/HEAT selection in a batch of outdoor unit group, change the setting. • COOL/HEAT selection (IND) ····················· Used to select COOL or HEAT by individual outdoor unit (factory setting).
Page 86 SiUS34-907 Field Setting b. “Setting mode 2” Setting item Description Cool/heat unified Sets address for cool/heat unified operation. Push and hold the MODE (BS1) address button for 5 seconds and set to Low noise/demand “Setting mode 2”. Address for low noise/demand operation address Used to conduct test operation without making changes to Test operation...
Page 87 Field Setting SiUS34-907 Setting item display C/H selection Setting condition display MODE TEST Demand Setting item noise Master Slave ∗ Factory setting k h h h h h h ∗ Address k h h h h h k Binary number Cool / Heat Unified address (6 digits)
Page 88 SiUS34-907 Field Setting Setting item display C/H selection Setting condition display MODE TEST Low noise Demand Setting item Master Slave ∗ Factory setting k h h h h h k Level 1 (outdoor fan with 6 step or lower) k h h h h k h ∗ Setting of external Level 2 (outdoor fan with 5 step low noise setting...
Page 89 Field Setting SiUS34-907 c. Monitor mode LED display Setting item Data display H1P H2P H3P H4P H5P H6P H7P To enter the monitor mode, push the l h h h h h h Various setting See below MODE (BS1) button when in l h h h h h k “Setting mode 1”.
Page 90 SiUS34-907 Field Setting 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.
Page 91 Field Setting SiUS34-907 3.2.2 Cool / Heat Mode Switching There are the following 4 cool/heat switching modes.  Set cool/heat separately for each outdoor unit system by indoor unit remote controller.  Set cool/heat separately for each outdoor unit system by cool/heat switching remote controller. ...
Page 92 SiUS34-907 Field Setting  Set Cool / Heat Separately for Each Outdoor Unit System by Cool/Heat Switching Remote Controller  It does not matter whether or not there is outdoor - outdoor unit wiring.  Set outdoor unit PCB DS1-1 to OUT (factory setting). ...
Page 93 Field Setting SiUS34-907 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 the low noise operation is carried out automatically at night (The external control adaptor for outdoor unit is not required) 1.
Page 94 SiUS34-907 Field Setting 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. Set item Condition Content Demand...
Page 95 Field Setting SiUS34-907   : ON : OFF : Blink Setting Setting Setting No. indication Setting No. indication Setting Setting contents indication (Initial setting) contents contents H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P External low NO (Factory...
Page 96 SiUS34-907 Field Setting 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 this procedure.
Page 97 Field Setting SiUS34-907 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 “Setting Mode 2” with units in stop mode, set “B Refrigerant Recovery / Vacuuming mode” to ON. The respective expansion valve of indoor and outdoor units are fully opened.
Page 98 SiUS34-907 Field Setting 3.2.6 Setting of Vacuuming Mode In order to perform vacuuming operation at site, fully open the expansion valves of indoor and outdoor units and turn on some solenoid valves. [Operating procedure]  In “Setting Mode 2” with units in stop mode, set “B Refrigerant Recovery / Vacuuming mode” to ON. The respective expansion valve of indoor and outdoor units are fully opened.
Page 99: Part 7 Troubleshooting
SiUS34-907 Part 7 Troubleshooting 1. Symptom-based Troubleshooting ............. 92 2. Troubleshooting by Remote Controller .............95 2.1 Self-diagnosis by Wired Remote Controller ..........96 2.2 Self-diagnosis by Wireless Remote Controller ........... 97 2.3 Remote Controller Maintenance Mode............99 2.4 Remote Controller Self-Diagnosis Function ..........102 3.
Page 100 SiUS34-907 3.30 “L4” Malfunction of Inverter Radiation Fin Temperature Rise ....159 3.31 “L5” Inverter Compressor Abnormal ............162 3.32 “L8” Inverter Current Abnormal ..............164 3.33 “L9” Inverter Compressor Start up Error ........... 166 3.34 “P1” High Voltage of Capacitor in Main Inverter Circuit......169 3.35 “P4”...
Page 101: Symptom-Based Troubleshooting
Symptom-based Troubleshooting SiUS34-907 1. Symptom-based Troubleshooting Symptom Supposed Cause Countermeasure The system does not start operation at all. Blowout of fuse(s) Turn Off the power supply and then replace the fuse(s). Cutout of breaker(s) • If the knob of any breaker is in its OFF position, turn ON the power supply.
Page 102 SiUS34-907 Symptom-based Troubleshooting Symptom Supposed Cause Countermeasure COOL-HEAT The remote controller displays This remote controller has no option Use a remote controller with option selection is UNDER CENTRALIZED to select cooling operation. to select cooling operation. disabled. CONTROL. The remote controller displays COOL-HEAT selection is made Use the COOL-HEAT selection UNDER CENTRALIZED...
Page 103 Symptom-based Troubleshooting SiUS34-907 Symptom Supposed Cause Countermeasure 11 The system <Indoor unit> These are operating sounds of the Normal operation. produces Immediately after turning ON electronic expansion valve of the This sound becomes low after a sounds. the power supply, indoor unit indoor unit.
Page 104: Troubleshooting By Remote Controller
SiUS34-907 Troubleshooting by Remote Controller 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 access a mode from the basic screen, refer to the figure below.
Page 105: Self-Diagnosis By Wired Remote Controller
Troubleshooting by Remote Controller SiUS34-907 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. Screen Operation lamp Mode...
Page 106: Self-Diagnosis By Wireless Remote Controller
SiUS34-907 Troubleshooting by Remote Controller 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 can be determined by following the procedure described below. (The malfunction code is displayed when an operation error has occurred.
Page 107 Troubleshooting by Remote Controller SiUS34-907  The right-side digit of the code changes as shown below when the UP and DOWN buttons are pressed. Troubleshooting...
Page 108: Remote Controller Maintenance Mode
SiUS34-907 Troubleshooting by Remote Controller 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. Select the desired Unit No.
Page 109 Troubleshooting by Remote Controller SiUS34-907 Maintenance Menu Item 2 Remarks 1. Model Name 1. Unit No. Select the Unit No. you want to check. 2. Indoor unit 3. Outdoor unit 2. Operating Hours 1. Unit No. Select the Unit No. you want to check. 2.
Page 110 SiUS34-907 Troubleshooting by Remote Controller Maintenance Menu Item 2 Remarks 6. Error Display 1. Display Warning ON Displays a warning on the screen if an error occurs. 2. Display Warning OFF No warning is displayed. 3. Display Error ON Displays the error on the screen. 4.
Page 111: Remote Controller Self-Diagnosis Function
Troubleshooting by Remote Controller SiUS34-907 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. Screen Operation lamp Mode...
Page 112 SiUS34-907 Troubleshooting by Remote Controller k : ON h : OFF l : Blink Malfunction Operation Malfunction contents Page code lamp Referred Indoor Unit Error of External Protection Device PCB Defect Malfunction of Drain Level Control System (S1L) Fan Motor (M1F) Lock, Overload Malfunction of Swing Flap Motor (M1S) Malfunction of Moving Part of Electronic Expansion Valve (Y1E) Drain Level above Limit...
Page 113 Troubleshooting by Remote Controller SiUS34-907 k : ON h : OFF l : Blink Malfunction Operation Malfunction contents Page code lamp Referred System Low Pressure Drop Due to Refrigerant Shortage or Electronic Expansion Valve Failure Reverse Phase, Open Phase — Power Supply Insufficient or Instantaneous Failure Check Operation not Executed Malfunction of Transmission between Indoor Units...
Page 114 SiUS34-907 Troubleshooting by Remote Controller Malfunction code indication by outdoor unit PCB <Monitor mode> Contents of malfunction To enter the monitor mode, push the Malfunction code MODE (BS1) button when in “Setting mode 1”. In-phase malfunction of DIII-NET Detection of DIII-NET Abnormal discharge pressure High pressure switch activated Abnormal suction pressure...
Page 115 Troubleshooting by Remote Controller SiUS34-907 k : ON h : OFF l : Blink Confirmation of malfunction 1 Confirmation of malfunction 2 Confirmation of malfunction 3 Confirmation of malfunction 4 Malfunction code H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P ∗1 ∗1 ∗1...
Page 116 SiUS34-907 Troubleshooting by Remote Controller <Monitor mode> Contents of malfunction Malfunction To enter the monitor mode, push the code MODE (BS1) button when in Open phase/Power supply imbalance Imbalance of inverter power supply “Setting mode 1”. voltage Faulty temperature sensor of inverter Faulty thermistor of inverter fin radiation fin Refrigerant shortage...
Page 117 Troubleshooting by Remote Controller SiUS34-907 k : ON h : OFF l : Blink Confirmation of malfunction 1 Confirmation of malfunction 2 Confirmation of malfunction 3 Confirmation of malfunction 4 Malfunction code H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P ∗1 ∗1 Display of contents of...
Page 118: Troubleshooting By Indication On The Remote Controller
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3. Troubleshooting by Indication on the Remote Controller “ ” Error of External Protection Device Remote Controller Display Applicable All indoor unit models Models Method of Detect open or short circuit between external input terminals in indoor unit. Malfunction Detection Malfunction...
Page 119: A1" Pcb Defect
Troubleshooting by Indication on the Remote Controller SiUS34-907 “ ” PCB Defect Remote Controller Display Applicable All indoor unit models Models Method of Check data from E²PROM. Malfunction Detection Malfunction When data could not be correctly received from the E²PROM Decision E²PROM : Type of nonvolatile memory.
Page 120: A3" Malfunction Of Drain Level Control System (S1L)
SiUS34-907 Troubleshooting by Indication on the Remote Controller “ ” Malfunction of Drain Level Control System (S1L) Remote Controller Display Applicable FXFQ, FXMQ, FXDQ Models FXHQ (Option), FXAQ (Option) Method of By float switch OFF detection Malfunction Detection Malfunction When rise of water level is not a condition and the float switch goes OFF Decision Conditions ...
Page 121 Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Is power supply Provide 208~230V power 208~230V provided? supply. The float A short switch is connected to circuit connector is...
Page 122: A6" Fan Motor (M1F) Lock, Overload
SiUS34-907 Troubleshooting by Indication on the Remote Controller “ ” Fan Motor (M1F) Lock, Overload Remote Controller Display Applicable FXAQ, FXFQ Models Method of Abnormal fan revolutions are detected by a signal output from the fan motor. Malfunction Detection Malfunction When the fan revolutions do not increase Decision Conditions...
Page 123 Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Turn OFF the power supply, and then wait for a period of 10 minutes. Are there any foreign matters Remove the foreign matters.
Page 124: A6" Malfunction Of Indoor Unit Fan Motor
SiUS34-907 Troubleshooting by Indication on the Remote Controller “ ” Malfunction of Indoor Unit Fan Motor Remote Controller Display Applicable FXHQ, FXDQ Models Method of This malfunction is detected if there is no revolutions detection signal output from the fan motor. Malfunction Detection Malfunction...
Page 125 Troubleshooting by Indication on the Remote Controller SiUS34-907 Remote Controller Display Applicable FXMQ Models Method of Detection from the current flow on the fan PCB Malfunction Detection from the RPM of the fan motor in operation Detection from the position signal of the fan motor Detection Detection from the current flow on the fan PCB when the fan motor starting operation ...
Page 126 SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Turn off the power and wait for 10 minutes. There is a foreign matter around Remove the foreign matter.
Page 127 Troubleshooting by Indication on the Remote Controller SiUS34-907 resistors among Replace the fan motor. U, V, and W are unbalanced or short-circuited. Remove the signal connector from the fan motor and check the resistance (*2). Between and GND terminals, and between GND and H Replace the fan motor.
Page 128: A7" Malfunction Of Swing Flap Motor (M1S)
SiUS34-907 Troubleshooting by Indication on the Remote Controller “ ” Malfunction of Swing Flap Motor (M1S) Remote Controller Display Applicable FXFQ, FXHQ, FXAQ 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 though the swing flap Decision motor is energized for a specified amount of time (about 30 seconds) Conditions...
Page 129 Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Caution Is power supply Provide 208~230V power 208~230V provided? supply. Indoor unit is a model equipped Replace the indoor unit PCB.
Page 130: A9" Malfunction Of Moving Part Of
SiUS34-907 Troubleshooting by Indication on the Remote Controller “ ” Malfunction of Moving Part of Electronic Expansion Valve (Y1E) Remote Controller Display Applicable All indoor unit models Models Method of Check coil condition of electronic expansion valve by using micro-computer Malfunction Detection Malfunction...
Page 131 Troubleshooting by Indication on the Remote Controller SiUS34-907 ∗1: Coil check method for the moving part of the electronic expansion valve Discount the electronic expansion valve from the PCB and check the continuity between the connector pins. (Normal) Pin No. 1.
Page 132: Af" Drain Level Above Limit
SiUS34-907 Troubleshooting by Indication on the Remote Controller “ ” Drain Level above Limit Remote Controller Display Applicable FXMQ, FXDQ Models Method of Water leakage is detected based on float switch ON/OFF operation while the compressor is in non- Malfunction operation.
Page 133: Aj" Malfunction Of Capacity Determination Device
Troubleshooting by Indication on the Remote Controller SiUS34-907 “ ” Malfunction of Capacity Determination Device Remote controller display Applicable All indoor unit models Models Method of Capacity is determined according to resistance of the capacity setting adaptor and the memory Malfunction inside the IC memory on the indoor unit PCB, and whether the value is normal or abnormal is determined.
Page 134: C4" Malfunction Of Thermistor (R2T) For Heat Exchanger
SiUS34-907 Troubleshooting by Indication on the Remote Controller “ ” Malfunction of Thermistor (R2T) for Heat Exchanger Remote Controller Display Applicable All indoor unit models Models Method of Malfunction detection is carried out by temperature detected by heat exchanger thermistor. Malfunction Detection Malfunction...
Page 135: C5" Malfunction Of Thermistor (R3T) For Gas Pipe
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.10 “ ” Malfunction of Thermistor (R3T) for Gas Pipe Remote Controller Display Applicable All indoor unit models Models Method of Malfunction detection is carried out by temperature detected by gas pipe thermistor. Malfunction Detection Malfunction...
Page 136: C9" Malfunction Of Thermistor (R1T) For Suction Air
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.11 “ ” Malfunction of Thermistor (R1T) for Suction Air Remote Controller Display Applicable All indoor unit models Models Method of Malfunction detection is carried out by temperature detected by suction air temperature thermistor. Malfunction Detection Malfunction...
Page 137: Cj" Malfunction Of Thermostat Sensor In Remote Controller
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.12 “ ” Malfunction of Thermostat Sensor in Remote Controller Remote Controller Display Applicable All indoor unit models Models Method of Malfunction detection is carried out by temperature detected by remote controller air temperature thermistor.
Page 138: E1" Pcb Defect
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.13 “ ” PCB Defect Remote Controller Display Applicable RXYMQ36 · 48PVJU Models Method of Abnormality is detected under the communication conditions in the hardware section between the Malfunction indoor unit and outdoor unit. Detection Malfunction When the communication conditions in the hardware section between the indoor unit and the...
Page 139: E3" Actuation Of High Pressure Switch
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.14 “ ” Actuation of High Pressure Switch Remote Controller Display Applicable RXYMQ36 · 48PVJU Models Method of Abnormality is detected when the contact of the high pressure protection switch opens. Malfunction Detection Malfunction Error is generated when the high pressure switch activation count reaches the number specific to...
Page 140 SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Check for the points shown below. Is the stop valve open? Is the high pressure switch connector properly connected to the main PCB? Does the high pressure switch have continuity?
Page 141 Troubleshooting by Indication on the Remote Controller SiUS34-907 *1: Make a comparison between the voltage of the pressure sensor and that read by the pressure gauge. For the pressure sensor voltage, measure voltage at the connector, and then convert it to pressure according to information on P.243.) *2: Take the measurement of voltage of the pressure sensor.
Page 142: E4" Actuation Of Low Pressure Sensor
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.15 “ ” Actuation of Low Pressure Sensor Remote Controller Display Applicable RXYMQ36 · 48PVJU Models Method of Abnormality is detected by the pressure value with the low pressure sensor. Malfunction Detection Malfunction Error is generated when the low pressure is dropped under specific pressure.
Page 143 Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Is the stop Open the stop valve. valve open? Mount a pressure gauge on the low pressure service port.
Page 144: E5" Inverter Compressor Motor Lock
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.16 “ ” Inverter Compressor Motor Lock Remote Controller Display Applicable RXYMQ36 · 48PVJU Models Method of Inverter PCB takes the position signal from UVW line connected between the inverter and Malfunction compressor, and the malfunction is detected when any abnormality is observed in the phase- current waveform.
Page 145 Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Check if Local factor the stop valve is open. Open the stop valve. Check if Replace the connecting wires the relay wires to the compressor...
Page 146 SiUS34-907 Troubleshooting by Indication on the Remote Controller Measure the inverter output voltage (*2). Power OFF Note: Measurement should be made while the frequency is stable. Check if the inverter Replace the inverter PCB. output voltage between 3 Power ON phases is within ±...
Page 147: E7" Malfunction Of Outdoor Unit Fan Motor
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.17 “ ” Malfunction of Outdoor Unit Fan Motor Remote Controller Display Applicable RXYMQ36 · 48PVJU Models Method of Detect a malfunction based on the current value in the inverter PCB (as for motor 2, current value in Malfunction the fan PCB).
Page 148 SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Caution Check in the monitor mode 4HP ~ 5HP class models have 2 fans. Check electric motor (electric motor 1 or 2) corresponding to malfunction code “E7”...
Page 149 Troubleshooting by Indication on the Remote Controller SiUS34-907 No continuity Replace the PCB (A1P). of fuse (F6U) on main PCB (A1P). Unable to rotate the fan manually with ease when removing Replace the corresponding fan the connector of the motor. fan motor.
Page 150: E9" Malfunction Of Moving Part Of Electronic Expansion Valve (Y1E, Y3E)
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.18 “ ” Malfunction of Moving Part of Electronic Expansion Valve (Y1E, Y3E) Remote Controller Display Applicable RXYMQ36 · 48PVJU Models Method of Check disconnection of connector To be detected based on continuity existence of coil of electronic expansion valve Malfunction Detection Malfunction...
Page 151 Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged Turn power supply off, and turn power supply on again. External factor other than Return to normal? malfunction (noise, for example).
Page 152: F3" Abnormal Discharge Pipe Temperature (R2T)
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.19 “ ” Abnormal Discharge Pipe Temperature (R2T) Remote Controller Display Applicable RXYMQ36 · 48PVJU Models Method of Abnormality is detected according to the temperature detected by the discharge pipe thermistor. Malfunction Detection Malfunction When the discharge pipe temperature rises to an abnormally high level (275 °F and above)
Page 153 Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Connect the service checker. Press reset and start operation again. Check if discharge pipe Replace the discharge pipe thermistor property is...
Page 154: F6" Refrigerant Overcharged
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.20 “ ” Refrigerant Overcharged Remote Controller Display Applicable RXYMQ36 · 48PVJU Models Method of Excessive charging of refrigerant is detected by using the outside air temperature, heat exchanging Malfunction deicer temperature and liquid pipe temperature during a check run. Detection Malfunction When the amount of refrigerant (calculated by using the outside air temperature), heat exchanging...
Page 155: H9" Malfunction Of Thermistor (R1T) For Outdoor Air
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.21 “ ” Malfunction of Thermistor (R1T) for Outdoor Air Remote Controller Display Applicable RXYMQ36 · 48PVJU Models Method of Malfunction is detected from the temperature detected by the outdoor air thermistor. Malfunction Detection Malfunction...
Page 156: J3" Malfunction Of Discharge Pipe Thermistor (R2T)
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.22 “ ” Malfunction of Discharge Pipe Thermistor (R2T) Remote Controller Display Applicable RXYMQ36 · 48PVJU Models Method of Malfunction is detected from the temperature detected by discharge pipe temperature thermistor. Malfunction Detection Malfunction When a short circuit or an open circuit in the discharge pipe temperature thermistor is detected.
Page 157: J5" Malfunction Of Thermistor (R3T, R5T) For Suction Pipe 1, 2
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.23 “ ” Malfunction of Thermistor (R3T, R5T) for Suction Pipe 1, 2 Remote Controller Display Applicable RXYMQ36 · 48PVJU Models Method of Malfunction is detected from the temperature detected by the thermistor for suction pipe 1, 2. Malfunction Detection Malfunction...
Page 158: J6" Malfunction Of Thermistor (R4T) For Outdoor Unit Heat Exchanger
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.24 “ ” Malfunction of Thermistor (R4T) for Outdoor Unit Heat Exchanger Remote Controller Display Applicable RXYMQ36 · 48PVJU Models Method of Malfunction is detected from the temperature detected by the heat exchanger thermistor. Malfunction Detection Malfunction...
Page 159: J7" Malfunction Of Thermistor (R7T) For Outdoor Unit Liquid Pipe
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.25 “ ” Malfunction of Thermistor (R7T) for Outdoor Unit Liquid Pipe Remote Controller Display Applicable RXYMQ36 · 48PVJU Models Method of Malfunction is detected from the temperature detected by the liquid pipe thermistor. Malfunction Detection Malfunction...
Page 160: J9" Malfunction Of Subcooling Heat Exchanger Gas
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.26 “ ” Malfunction of Subcooling Heat Exchanger Gas Pipe Thermistor (R6T) Remote Controller Display Applicable RXYMQ36 · 48PVJU Models Method of Malfunction is detected according to the temperature detected by subcooling heat exchanger gas pipe thermistor.
Page 161: Ja" Malfunction Of High Pressure Sensor
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.27 “ ” Malfunction of High Pressure Sensor Remote Controller Display Applicable RXYMQ36 · 48PVJU Models Method of Malfunction is detected from the pressure detected by the high pressure sensor. Malfunction Detection Malfunction When the high pressure sensor is short circuit or open circuit Decision...
Page 162 SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Confirm which high pressure sensor is abnormal using outdoor unit "monitor mode". (Refer to P.105, 106) 1.Set the high pressure gauge upright.
Page 163: Jc" Malfunction Of Low Pressure Sensor
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.28 “ ” Malfunction of Low Pressure Sensor Remote Controller Display Applicable RXYMQ36 · 48PVJU Models Method of Malfunction is detected from pressure detected by low pressure sensor. Malfunction Detection Malfunction When the low pressure sensor is short circuit or open circuit Decision (Not less than 257psi, or 1.45psi and below) Conditions...
Page 164 SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Confirm which low pressure sensor is abnormal using outdoor unit "monitor mode".
Page 165 Troubleshooting by Indication on the Remote Controller SiUS34-907 ∗1: Voltage measurement point ∗2: Refer to “Pressure Sensor, Pressure / Voltage Characteristics” table on P.243. Troubleshooting...
Page 166: L1" Malfunction Of Pcb
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.29 “ ” Malfunction of PCB Remote Controller Display Applicable RXYMQ36 · 48PVJU Models Method of Malfunction is detected based on the current value during waveform output before starting Malfunction compressor. Malfunction is detected based on the value from current sensor during synchronous operation Detection when starting the unit.
Page 167: Troubleshooting
Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Turn OFF the power supply once, and then check the compressor lead wires. Do the lead wires have any disconnection, broken wire,...
Page 168: L4" Malfunction Of Inverter Radiation Fin Temperature Rise
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.30 “ ” Malfunction of Inverter Radiation Fin Temperature Rise Remote Controller Display Applicable RXYMQ36 · 48PVJU 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 above 181°F...
Page 169 Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. The radiation fin of the main PCB Faulty radiation from the power concerned exceeded a unit temperature of...
Page 170 SiUS34-907 Troubleshooting by Indication on the Remote Controller Main PCB ∗ Refer to “Thermistor Resistance / Temperature Characteristics” table on P.241. Troubleshooting...
Page 171: L5" Inverter Compressor Abnormal
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.31 “ ” Inverter Compressor Abnormal Remote Controller Display Applicable RXYMQ36 · 48PVJU Models Method of Malfunction is detected from current flowing in the power transistor. Malfunction Detection Malfunction When an excessive current flows in the power transistor Decision (Instantaneous overcurrent also causes activation.) Conditions...
Page 172 SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting Compressor inspection Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Check if the stop Open the stop valve. valve is open. Check if the compressor lead Replace the compressor lead...
Page 173: L8" Inverter Current Abnormal
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.32 “ ” Inverter Current Abnormal Remote Controller Display Applicable RXYMQ36 · 48PVJU Models Method of Malfunction is detected by current flowing in the power transistor. Malfunction Detection Malfunction When overload in the compressor is detected. (Inverter secondary current 16.1A) (1) 19.0A and over continues for 5 seconds.
Page 174 SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Check if the Open the stop valve. stop valve is open. Check if the compressor lead wires Replace the compressor lead...
Page 175: L9" Inverter Compressor Start Up Error
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.33 “ ” Inverter Compressor Start up Error Remote Controller Display Applicable RXYMQ36 · 48PVJU Models Method of Detect the failure based on the signal waveform of the compressor. Malfunction Detection Malfunction Starting the compressor does not complete.
Page 176 SiUS34-907 Troubleshooting by Indication on the Remote Controller Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Check if it is the first time to start Continued to A (on the after installation.
Page 177 Troubleshooting by Indication on the Remote Controller SiUS34-907 Refrigerant is inactive. ( The unit is out Cancel the inactive state of of power supply for more refrigerant. than 6 hours.) Check if the insulation resistance of the Replace the inverter compressor is 100kW compressor.
Page 178: P1" High Voltage Of Capacitor In Main Inverter Circuit
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.34 “ ” High Voltage of Capacitor in Main Inverter Circuit Remote Controller Display Applicable RXYMQ36 · 48PVJU Models Method of Imbalance in supply voltage is detected in PCB. Malfunction Detection Malfunction When the imbalance in the power supply voltage becomes more than 6V The unit operation is continued without malfunction decision.
Page 179 Give the user a copy of "notification of inspection results" and leave there is a "power supply imbalance" it up to him to improve the imbalance. for which DAIKIN is not responsible. *1.Measure voltage at the X1M power supply terminal block. Troubleshooting...
Page 180: P4" Malfunction Of Inverter Radiating Fin Temperature Rise Sensor
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.35 “ ” Malfunction of Inverter Radiating Fin Temperature Rise Sensor Remote Controller Display Applicable RXYMQ36 · 48PVJU Models Method of Resistance of radiation fin thermistor is detected when the compressor is not operating. Malfunction Decision Conditions: Malfunction When the resistance value of thermistor becomes a value equivalent to open or short circuited...
Page 181 Troubleshooting by Indication on the Remote Controller SiUS34-907 Main PCB ∗ Refer to “Thermistor Resistance / Temperature Characteristics” table on P.241. Troubleshooting...
Page 182: U0" Low Pressure Drop Due To Refrigerant Shortage Or
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.36 “ ” Low Pressure Drop Due to Refrigerant Shortage or Electronic Expansion Valve Failure Remote Controller Display Applicable RXYMQ36 · 48PVJU Models Malfunction [In cooling mode] Low pressure becomes 14.5psi or below. Decision [In heating mode] Conditions...
Page 183 Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. In cooling mode Set up a pressure gauge at the service port on the low pressure side. Check if the Check if the property of low pressure...
Page 184: U2" Power Supply Insufficient Or Instantaneous Failure
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.37 “ ” Power Supply Insufficient or Instantaneous Failure Remote Controller Display Applicable RXYMQ36 · 48PVJU Models Method of Detection of voltage of main circuit capacitor built in the inverter and power supply voltage. Malfunction Detection Malfunction...
Page 185 Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Check for power supply voltage. Voltage between phases: 380 to Onsite causes. 415V Phase voltage: 220 Make proper wire connections to 240V...
Page 186 SiUS34-907 Troubleshooting by Indication on the Remote Controller Check the fan driver power transistor. Has the Replace the main PCB (A1P). power transistor got faulty? Observe the conditions of the PCB. Power OFF Has the main PCB caused Replace the main PCB. *If the PCB replaced is badly damage? damaged, the compressor is...
Page 187: U3" Check Operation Is Not Executed
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.38 “ ” Check Operation is not Executed Remote Controller Display Applicable RXYMQ36 · 48PVJU Models Method of Check operation is executed or not Malfunction Detection Malfunction Malfunction is decided when the unit starts operation without check operation. Decision Conditions ...
Page 188: U4" Malfunction Of Transmission Between Indoor Units And Outdoor Units
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.39 “ ” Malfunction of Transmission between Indoor Units and Outdoor Units Remote Controller Display Applicable All indoor unit models Models RXYMQ36 · 48PVJU Method of Micro-computer checks if transmission between indoor and outdoor units is normal. Malfunction Detection Malfunction...
Page 189 Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Check the detailed malfunction status in the monitor mode. (Refer to P.105, 106 for how to check.) In confirmation Go on to P.182.
Page 190 SiUS34-907 Troubleshooting by Indication on the Remote Controller Check if the indoor/outdoor, Correct the connecting wires. outdoor/outdoor connecting wires are normal. Check if the operation is normal Replace the main PCB of with 1 circuit after outdoor/outdoor connecting wires are outdoor unit.
Page 191 Troubleshooting by Indication on the Remote Controller SiUS34-907 Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Continued from the previous page In confirmation of malfunction 4, LED lamp indicates as follows: Start operation of all the indoor units.
Page 192: Remote Controller And Indoor Unit
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.40 “ ” Malfunction of Transmission between Remote Controller and Indoor Unit Remote Controller Display Applicable All indoor unit models Models Method of If controlling with 2remote controllers, check the system using a micro-computer to ensure that the signal transmission between the indoor unit and the remote controllers (main and sub) is normal.
Page 193 Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Caution SS1 of Using both remote controllers Set one remote controller to 2 remote controllers is set to "MAIN."...
Page 194: U8" Malfunction Of Transmission Between Main And Sub Remote Controllers
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.41 “ ” Malfunction of Transmission between Main and Sub Remote Controllers Remote Controller Display Applicable All indoor unit models Models Method of If controlling with 2remote controllers, check the system using a micro-computer to ensure that the signal transmission between the indoor unit and the remote controllers (main and sub) is normal.
Page 195: U9" Malfunction Of Transmission Between Indoor Units And Outdoor Units In The Same System
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.42 “ ” Malfunction of Transmission between Indoor Units and Outdoor Units in the Same System Remote Controller Display Applicable All indoor unit models Models Method of Detect malfunction signal for the other indoor units within the circuit by outdoor unit PCB. Malfunction Detection Malfunction...
Page 196: Ua" Improper Combination Of Indoor And Outdoor Units Etc
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.43 “ ” Improper Combination of Indoor and Outdoor Units etc. Remote Controller Display Applicable All indoor unit models Models Method of A difference occurs in data by the type of refrigerant between indoor and outdoor units. The number of indoor units is out of the allowable range.
Page 197 Troubleshooting by Indication on the Remote Controller SiUS34-907 Diagnosis Flow 1 Confirmation of Confirmation of malfunction 3 malfunction 4 The number of indoor units connected to the same refrigerant circuit Replace the main PCB of the system should not be more outdoor unit.
Page 198 SiUS34-907 Troubleshooting by Indication on the Remote Controller Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Confirmation of Confirmation of malfunction 3 Check Check if the outdoor if the unit is not unit PCB is replaced Replace the main PCB of the connected to outdoor units...
Page 199: Uc" Address Duplication Of Centralized Remote Controller
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.44 “ ” Address Duplication of Centralized Remote Controller Remote Controller Display Applicable All indoor unit models Models Method of The principal indoor unit detects the same address as that of its own on any other indoor unit. Malfunction Detection Malfunction...
Page 200: U5" Malfunction Of Transmission Between
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.45 “ ” Malfunction of Transmission between Centralized Remote Controller and Indoor Unit Remote Controller Display Applicable All indoor unit models Models Centralized remote controller, intelligent Touch Controller, Schedule timer Method of Micro-computer checks if transmission between indoor unit and centralized remote controller is normal.
Page 201 Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Caution Check the indoor unit for which “UE” is displayed. Continued to A (on the Is the the transmission malfunction following page) (UE) caused on...
Page 202 SiUS34-907 Troubleshooting by Indication on the Remote Controller Check the transmission wiring between centralized Abnormal Correct the wiring. remote controller for any broken wire. CHECK 8 Normal Check the transmission wiring with the master Abnormal Correct the wiring. unit centralized remote controller for any broken wire.
Page 203: Uf" System Is Not Set Yet
Troubleshooting by Indication on the Remote Controller SiUS34-907 3.46 “ ” System is not Set yet Remote Controller Display Applicable All indoor unit models Models RXYMQ36 · 48PVJU Method of On check operation, the number of indoor units in terms of transmission is not corresponding to that Malfunction of indoor units that have made changes in temperature.
Page 204: Uh" Malfunction Of System, Refrigerant System Address Undefined
SiUS34-907 Troubleshooting by Indication on the Remote Controller 3.47 “ ” Malfunction of System, Refrigerant System Address Undefined Remote Controller Display Applicable All indoor unit models Models RXYMQ36 · 48PVJU Method of Detect an indoor unit with no auto address setting. Malfunction Detection Malfunction...
Page 205 Troubleshooting by Indication on the Remote Controller SiUS34-907 Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Does electricity a malfunction being introduced for occur even after 12 the first time after minutes elapses from the time Normal...
Page 206: Troubleshooting (Op: Centralized Remote Controller)
SiUS34-907 Troubleshooting (OP: Centralized Remote Controller) 4. Troubleshooting (OP: Centralized Remote Controller) “ ” PCB Defect Remote Controller Display Applicable Centralized remote controller intelligent Touch Controller Schedule timer Models Method of Detect an abnormality in the DIII-NET polarity circuit. Malfunction Detection Malfunction When + polarity and - polarity are detected at the same time.
Page 207: M8" Malfunction Of Transmission Between Optional Controllers For Centralized Control
Troubleshooting (OP: Centralized Remote Controller) SiUS34-907 “ ” Malfunction of Transmission between Optional Controllers for Centralized Control Remote Controller Display Applicable Centralized remote controller / intelligent Touch Controller Models Schedule timer Method of Detect the malfunction according to DIII-NET transmission data. (The system will be automatically reset.) Malfunction Detection...
Page 208 SiUS34-907 Troubleshooting (OP: Centralized Remote Controller) Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Were any changes made to the number of units of centralized remote controller? (The centralized remote Reset the power supplies of controller was connected once, and every centralized remote...
Page 209: Ma" Improper Combination Of Optional Controllers For Centralized Control
Troubleshooting (OP: Centralized Remote Controller) SiUS34-907 “ ” Improper Combination of Optional Controllers for Centralized Control Remote Controller Display Applicable Centralized remote controller intelligent Touch Controller Models Schedule timer Method of Detect the malfunction according to DIII-NET transmission data. Malfunction Detection Malfunction When the schedule timer is set to individual-use mode, another central component is present.
Page 210 SiUS34-907 Troubleshooting (OP: Centralized Remote Controller) Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Has the remote control adaptor Not available for combined use (KRP2A series) been with the remote control adaptor.
Page 211: Mc" Address Duplication, Improper Setting
Troubleshooting (OP: Centralized Remote Controller) SiUS34-907 “ ” Address Duplication, Improper Setting Remote Controller Display Applicable Centralized remote controller intelligent Touch Controller Models Schedule timer Method of Detect the malfunction according to DIII-NET transmission data. Malfunction Detection  Two or more units of centralized remote controllers and intelligent Touch Controllers are Malfunction Decision connected, and all of them are set to master unit central setting or slave unit central setting.
Page 212 SiUS34-907 Troubleshooting (OP: Centralized Remote Controller) Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Did the Is the Master/ malfunction Slave setting of the occur while in the first test run centralized remote controller using the intelligent Touch correct?
Page 213: Troubleshooting (Op: Unified On/Off Controller)
Troubleshooting (OP: Unified ON/OFF Controller) SiUS34-907 5. Troubleshooting (OP: Unified ON/OFF Controller) Operation Lamp Blinks Remote Operation lamp blinks Controller Display Applicable All model of indoor units Models Unified ON/OFF controller Method of Detect the malfunction according to DIII-NET transmission data. Malfunction Detection Malfunction...
Page 214 SiUS34-907 Troubleshooting (OP: Unified ON/OFF Controller) Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Is a malfunction Diagnose the cause with the air code displayed on the remote controller? conditioner's failure diagnosis manual.
Page 215: Display "Under Centralized Control" Blinks (Repeats Single Blink)
Troubleshooting (OP: Unified ON/OFF Controller) SiUS34-907 Display “Under Centralized Control” Blinks (Repeats Single Blink) Remote “under centralized control” (Repeats single blink) Controller Display Applicable Unified ON/OFF controller Centralized remote controller, Schedule timer Models Method of Detect the malfunction according to DIII-NET transmission data. Malfunction Detection Malfunction...
Page 216 SiUS34-907 Troubleshooting (OP: Unified ON/OFF Controller) Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged. Has a once connected optional controller for centralized Reset power supply control been disconnected simultaneously for all optional or its address controllers for centralized...
Page 217 Troubleshooting (OP: Unified ON/OFF Controller) SiUS34-907 Is the wiring adaptor for Cannot be used in combination electrical appendices with a wiring adaptor for connected? electrical appendices. Remove the wiring adaptor for electrical appendices and reset the power supply for all optional controllers Is a schedule timer for centralized control connected?
Page 218: Display "Under Centralized Control" Blinks (Repeats Double Blink)
SiUS34-907 Troubleshooting (OP: Unified ON/OFF Controller) Display “Under Centralized Control” Blinks (Repeats Double Blink) Remote “under centralized control” (Repeats double blink) Controller Display Applicable Unified ON/OFF controller Models Method of Detect the malfunction according to DIII-NET transmission data. Malfunction Detection Malfunction When no central control addresses are set to indoor units Decision...
Page 219: Troubleshooting
SiUS34-907 CHECK 1 Check for Causes of Rise in High Pressure Referring to the Fault Tree Analysis (FTA) shown below, probe the faulty points. ←Check to be sure the stop valve is open. Stop valve closed Local High pipe ←Conduct visual checks for pipe conditions. pressure Bent or crashed pipe resistance...
Page 220 SiUS34-907 CHECK 2 Check for Causes of Drop in Low Pressure Referring to the Fault Tree Analysis (FTA) shown below, probe the faulty points. [In cooling] ←Are the electrical characteristics normal? Faulty low pressure sensor Faulty (See *1.) compressor ←Is the pressure value checked with the Service Checker Faulty low capacity Faulty control PCB...
Page 221 SiUS34-907 CHECK 3 Check for Fan Motor Connector (1) Turn the power supply off. (2) With the fan motor connector disconnected, measure the resistance between each pin, then make sure that the resistance is more than the value mentioned in the following table. 1 White Measurement point Judgement...
Page 222 SiUS34-907 CHECK 4 Power Transistor Check Perform the following procedures prior to check. (1) Power Off. (2) Remove all the wiring connected to the PCB where power transistors are mounted on. * Preparing a tester in the analog system is recommended. [Preparation] A tester in the digital system with diode check function will be ·...
Page 223 SiUS34-907 [PCB and Circuit Diagram] IGBT X10A X11A Troubleshooting...
Page 224 SiUS34-907 CHECK 5 Check on connector of fan motor (Power supply wire) (1) Turn off the power supply. Measure the resistance between phases of U,V,W at the motor side connectors (three-core wire) to check that the values are balanced and there is no short circuiting, while connector or relay connector is disconnected.
Page 225 SiUS34-907 CHECK 7 Check the Factors of Overheat Operation Identify the defective points referring to the Fault Tree Analysis (FTA) as follows. Hot gas circuit clogging Faulty hot Defective solenoid ← Check if coil resistance and insulation gas bypass valve coil control are normal.
Page 226 SiUS34-907 CHECK 8 Broken Wire Check of the Connecting Wires 1. Procedure for checking outdoor-outdoor unit transmission wiring for broken wires: On the system shown below, turn OFF the power supply to all equipment, short-circuit between the outdoor- outdoor unit terminal parts F1 and F2 in the "Outdoor Unit A" that is farthest from the centralized remote controller, and then conduct continuity checks between the transmission wiring terminal blocks F1 and F2 of the centralized remote controller using a multi-meter.
Page 227 SiUS34-907 CHECK 9 Master Unit Central Connector Setting Table The master unit central setting connector (CN1/X1A) is mounted at the factory. • To independently use a single unit of the intelligent Touch Controller or a single unit of the centralized remote controller, do not dismount the master unit central setting connector (i.e., use the connector with the factory setting unchanged).
Page 228 SiUS34-907 CHECK 10 Master-Slave Unit Setting Table Combination of intelligent Touch Controller and Centralized Remote Controller Master Slave Master/ Master/ Master/ Master/ Pattern 1-00~4-15 5-00~8-15 1-00~4-15 5-00~8-15 Slave Slave Slave Slave Master Master Slave Slave Master — — Slave — —...
Page 229 SiUS34-907 CHECK 11 Method of Replacing the Inverter’s Power Transistors Modules Checking failures in power semiconductors mounted on inverter PCB Check the power semiconductors mounted on the inverter PCB by the use of a multiple tester. <Items to be prepared> h Multiple tester : Prepare the digital type of multiple tester with diode check function.
Page 230 SiUS34-907 Power module checking When using the digital type of multiple tester, make measurement in diode check mode. Tester terminal Criterion Remark Not less than 0.3V It may take time to (including ∞)* determine the voltage due to capacitor charge or else. Not less than 0.3V (including ∞)* 0.3 to 0.7V...
Page 231: Part 8 Appendix
SiUS34-907 Part 8 Appendix 1. Piping Diagrams..................223 1.1 Outdoor Unit ..................... 223 1.2 Indoor Unit....................224 2. Wiring Diagrams..................227 2.1 Outdoor Unit ..................... 227 2.2 Field Wiring ....................228 2.3 Indoor Unit....................229 3. Option List ....................236 3.1 Option List of Controllers................236 3.2 Option List of Outdoor Unit...............
Page 232: Piping Diagrams
SiUS34-907 Piping Diagrams 1. Piping Diagrams Outdoor Unit RXYMQ36 · 48PVJU S1PH S1NPL Appendix...
Page 233: Indoor Unit
Piping Diagrams SiUS34-907 Indoor Unit FXFQ, FXHQ 4D024460D Code Name Code Main function Used for gas superheated degree control while in cooling Electronic expansion valve operation or subcooled degree control while in heating operation. Suction air temperature thermistor Used for thermostat control. Used for gas superheated degree control while in cooling Liquid pipe temperature thermistor operation or subcooled degree control while in heating...
Page 234 SiUS34-907 Piping Diagrams FXZQ 4D040157  Refrigerant pipe connection port diameters (in) Model Liquid φ1/2 φ1/4 FXZQ07 / 09 / 12 / 18MVJU FXDQ 4D043864M  Refrigerant pipe connection port diameters (in) Model Liquid φ1/2 φ1/4 FXDQ07 / 09 / 12 / 18MVJU φ5/8 φ3/8 FXDQ24MVJU...
Page 235 Piping Diagrams SiUS34-907 FXMQ, FXLQ, FXNQ 4D034245D  Refrigerant pipe connection port diameters (in) Model Liquid FXMQ07 / 09 / 12 / 18PVJU φ1/2 φ1/4 FXLQ12 / 18MVJU FXNQ12 / 18MVJU FXMQ24 / 30PVJU φ5/8 φ3/8 FXLQ24MVJU FXNQ24MVJU Appendix...
Page 236: Wiring Diagrams
SiUS34-907 Wiring Diagrams 2. Wiring Diagrams Outdoor Unit 2.1.1 Heat Pump RXYMQ36 · 48PVJU Appendix...
Page 237: Field Wiring
Wiring Diagrams SiUS34-907 Field Wiring RXYMQ36 / 48PVJU Appendix...
Page 238: Indoor Unit
SiUS34-907 Wiring Diagrams Indoor Unit FXFQ12M / 18M / 24M / 30M / 36MVJU Appendix...
Page 239 Wiring Diagrams SiUS34-907 FXZQ07M / 09M / 12M / 18MVJU Appendix...
Page 240 SiUS34-907 Wiring Diagrams FXDQ07M / 09M / 12M / 18M / 24MVJU Appendix...
Page 241 Wiring Diagrams SiUS34-907 FXMQ07P / 09P / 12P / 18P / 24P / 30P / 36P / 48PVJU Appendix...
Page 242 SiUS34-907 Wiring Diagrams FXHQ12M / 24M / 36MVJU Appendix...
Page 243 Wiring Diagrams SiUS34-907 FXAQ07M / 09M / 12M / 18M / 24MVJU Appendix...
Page 244 SiUS34-907 Wiring Diagrams FXLQ12M / 18M / 24MVJU FXNQ12M / 18M / 24MVJU Appendix...
Page 245: Option List
Option List SiUS34-907 3. Option List Option List of Controllers Optional Accessories of Operation Control System Type FXFQ~MVJU FXZQ-MVJU FXMQ~PVJU FXAQ~MVJU FXLQ~MVJU FXHQ~MVJU FXDQ~MVJU Item FXNQ~MVJU Wireless BRC7C812 — BRC4C82 BRC7E818 — BRC7E83 BRC4C82 Remote controller BRC1C71 Wired BRC1D71 Set back time clock BRC15A71 Remote sensor KRCS01-1...
Page 246: Option List Of Outdoor Unit
SiUS34-907 Option List Option List of Outdoor Unit RXYQM36 · 48MVJU Optional accessories RXYMQ36MVJU, RXM48MVJU Cool/Heat Selector KRC19-26A Fixing box KJB111A KHRP26M22H, KHRP26M33H REFNET header (MAX. 4 branch) (MAX. 8 branch) REFNET joint KHRP26M22T Central drain plug KKPJ5F180 Fixture for preventing overturning KPT-60B160 Wire fixture for preventing overturning K-KYZP15C...
Page 247 Option List SiUS34-907 Appendix...
Page 248: Example Of Connection
SiUS34-907 4. Example of Connection Appendix...
Page 249 Example of Connection...
Page 250: Thermistor Resistance / Temperature Characteristics
SiUS34-907 Thermistor Resistance / Temperature Characteristics 5. Thermistor Resistance / Temperature Characteristics Indoor unit For air suction For liquid pipe For gas pipe Outdoor unit for fin thermistor Outdoor unit For outdoor air For suction pipe 1 For heat exchanger For suction pipe 2 For Subcooling heat exchanger outlet R6T For Liquid pipe...
Page 251 Thermistor Resistance / Temperature Characteristics SiUS34-907 Outdoor Unit Thermistors for Discharge Pipe (R2T) T°F T°C kΩ T°F T°C kΩ T°F T°C kΩ 32.0 640.44 122.0 72.32 212.0 13.35 33.8 609.31 123.8 69.64 213.8 12.95 35.6 579.96 125.6 67.06 215.6 12.57 37.4 552.00 127.4...
Page 252: Pressure Sensor
SiUS34-907 Pressure Sensor 6. Pressure Sensor = 1.38V -0.69 : Output Voltage [High Side] V = 0.57V -0.28 : Output Voltage [Low Side] V Detected Pressure : High pressure (MPa) : Low pressure (MPa) High Pressure (P Low Pressure (P Output Voltage (V Appendix...
Page 253: Part 9 Precautions For New Refrigerant (R-410A)
SiUS34-907 Part 9 Precautions for New Refrigerant (R-410A) 1. Precautions for New Refrigerant (R-410A) ..........245 1.1 Outline ...................... 245 1.2 Refrigerant Cylinders................247 1.3 Service Tools.................... 248 Precautions for New Refrigerant (R-410A)
Page 254: Precautions For New Refrigerant (R-410A)
SiUS34-907 Precautions for New Refrigerant (R-410A) 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 255 Precautions for New Refrigerant (R-410A) SiUS34-907  Thermodynamic characteristic of R-410A Temperature Steam pressure Density Specific heat at constant Specific enthalpy Specific entropy (˚F) (psi) (kg/m pressure (kJ/kgK) (kJ/kg) (kJ/KgK) Liquid Vapor Liquid Vapor Liquid Vapor Liquid Vapor Liquid Vapor 5.24 5.24 5.92...
Page 256: Refrigerant Cylinders
SiUS34-907 Precautions for New Refrigerant (R-410A) Refrigerant Cylinders  Cylinder specifications • The cylinder is painted refrigerant color (pink). • The cylinder valve is equipped with a siphon tube. Cylinder Refrigerant can be charged in liquid state with cylinder in upright position.
Page 257: Service Tools
Precautions for New Refrigerant (R-410A) SiUS34-907 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 258 SiUS34-907 Precautions for New Refrigerant (R-410A) 1. Flaring tool Flare gauge  Specifications • Dimension A Unit:in. Tube O.D. −0.4 Nominal size Class-2 (R-410A) Class-1 (Conventional) 0.36 0.35 0.52 0.51 0.65 0.64 0.78 0.76 0.94 0.92  Differences • Change of dimension A Dimension A For class-1: R-407C For class-2: R-410A...
Page 259 Precautions for New Refrigerant (R-410A) SiUS34-907 2. Torque wrench  Specifications • Dimension B Unit:in. Nominal size Class-1 Class-2 Previous 0.94 1.02 0.94 1.06 1.14 1.06 No change in tightening torque No change in pipes of other sizes  Differences •...
Page 260 SiUS34-907 Precautions for New Refrigerant (R-410A) 4. Leak tester  Specifications • Hydrogen detecting type, etc. • Applicable refrigerants R-410A, R-407C, R-404A, R-507A, R-134a, etc.  Differences • Previous testers detected chlorine. Since HFCs do not contain chlorine, new tester detects hydrogen. 5.
Page 261 Precautions for New Refrigerant (R-410A) SiUS34-907 • Low pressure gauge – 14.5 to 551 psi (– 76 cmHg to 38 kg/cm • 1/4" → 5/16" (2min → 2.5min) • No oil is used in pressure test of gauges. → For prevention of contamination •...
Page 262 SiUS34-907 Precautions for New Refrigerant (R-410A) 9. Weigher for refrigerant charge  Specifications • High accuracy TA101A (for 10-kg cylinder) = ± 2g TA101B (for 20-kg cylinder) = ± 5g • Equipped with pressure-resistant sight glass to check liquid refrigerant charging. •...
Page 263 Precautions for New Refrigerant (R-410A) SiUS34-907 Precautions for New Refrigerant (R-410A)
Page 264 Daikin Industries, Ltd.’s products are manufactured for export to numerous countries throughout the 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 authorized importer, distributor and/or retailer whether this product conforms tot he applicable standards, and is suitable for use, in the region where the product will be used.

This manual is also suitable for:

R-410a Vrv iii-s rxymq36-48pvju

Daikin VRV III-S RXYMQ36 48PVJU Service Manual

R-410A Heat Pump 60Hz

Part 1 General Information

1 Model Names of Indoor/Outdoor Units

2 External Appearance

3 Capacity Range

Part 4 Refrigerant Circuit

1 Refrigerant Circuit

2 Functional Parts Layout

Part 5 Function

1 Operation Mode

2 Basic Control

3 Special Control

4 Protection Control

5 Other Control

6 Outline of Control (Indoor Unit)

Part 6 Test Operation

1 Test Operation

2 Outdoor Unit PCB Layout

3 Field Setting

Part 7 Troubleshooting

1 Symptom-Based Troubleshooting

2 Troubleshooting by Remote Controller

3 Troubleshooting by Indication on the Remote Controller

4 Troubleshooting (OP: Centralized Remote Controller)

5 Troubleshooting (OP: Unified ON/OFF Controller)

Part 8 Appendix

1 Piping Diagrams

2 Wiring Diagrams

3 Option List

4 Example of Connection

5 Thermistor Resistance / Temperature Characteristics

6 Pressure Sensor

Quick Links

Chapters

Troubleshooting

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Summary of Contents for Daikin VRV III-S RXYMQ36 48PVJU