Page 1 SiUS281117 Service Manual RZR-P, RZQ-P(9) Series Cooling Only / Heat Pump R-410A 60Hz...
Page 2: Table Of Contents
SiUS281117 RZR-P, RZQ-P(9) Series Cooling Only / Heat Pump R-410A 60Hz ED Reference For items below, please refer to Engineering Data. For except FTQ Item ED No. Page Remarks Specification - Cooling Only EDUS281120 p. 7-13 Specification - Heat Pump EDUS281120 p.
Page 3 SiUS281117 2. Functional Parts Layout ................10 2.1 RZR18 / 24 / 30PVJU RZQ18 / 24PVJU9 RZQ30PVJU ..................10 Part 3 Remote Controller ............11 1. Wired Remote Controller ..............12 1.1 Applicable Models .................. 12 1.2 Names and Functions ................13 1.3 MAIN/SUB Setting when Using 2 Remote Controllers......
Page 4 SiUS281117 6.3 Room Temperature Thermistor in Remote Controller......52 6.4 Thermostat Control with Operation Mode Set to "AUTO" ...... 54 6.5 Freeze-up Prevention ................55 6.6 View of Operations of Swing Flaps ............56 6.7 Hot Start Control (In Heating Operation Only) ........57 6.8 Heater Control (FTQ) ................
Page 5 SiUS281117 2.19 Suction Air Thermistor Abnormality ............. 127 2.20 Humidity Sensor System Abnormality..........128 2.21 Room Temperature Thermistor in Remote Controller Abnormality..129 2.22 Outdoor Unit PCB Abnormality ............130 2.23 High Pressure Abnormality ..............131 2.24 Actuation of Low Pressure Sensor............133 2.25 Inverter Compressor Motor Lock ............
Page 6: Safety Considerations
Safety Considerations SiUS281117 1. Safety Considerations Read these SAFETY CONSIDERATIONS carefully before Never use tools or materials designed for R22 performing any repair work. Comply with these safety refrigerant systems on an R410A refrigerant system. symbols without fail.Meanings of DANGER, WARNING, Doing so can cause a serious accident or an CAUTION, and NOTE Symbols: equipment failure.
Page 7: Safety Considerations For Users
SiUS281117 Safety Considerations • Do not clean the air conditioner by splashing water • Check the grounding and repair it if the equipment is on it. Washing the unit with water may cause an not properly grounded. Improper grounding may electrical shock.
Page 8: Part 1 General Information
SiUS281117 Part 1 General Information 1. Model Names and Power Supply............2 1.1 Cooling Only .................... 2 1.2 Heat Pump ....................2 2. External Appearance ................3 2.1 Indoor Units....................3 2.2 Remote Controller ..................4 2.3 Outdoor Units ................... 4 General Information...
Page 9: Model Names And Power Supply
SiUS281117 Part 2 Refrigerant Circuit 1. Refrigerant Circuit ...................6 1.1 RZR18 / 24 / 30PVJU RZQ18 / 24PVJU9 RZQ30PVJU .................... 6 1.2 RZR36 / 42PVJU RZQ36 / 42PVJU(9) ................. 8 2. Functional Parts Layout ................10 2.1 RZR18 / 24 / 30PVJU RZQ18 / 24PVJU9 RZQ30PVJU ..................
Page 10: External Appearance
SiUS281117 Model Names and Power Supply 1. Model Names and Power Supply Cooling Only Indoor unit Outdoor unit Power supply, Compatibility symbol FCQ18PAVJU RZR18PVJU FCQ24PAVJU RZR24PVJU Ceiling mounted cassette type FCQ30PAVJU RZR30PVJU (Round flow) FCQ36PAVJU RZR36PVJU FCQ42PAVJU RZR42PVJU FHQ18PVJU RZR18PVJU FHQ24PVJU RZR24PVJU Ceiling suspended type...
Page 11: Remote Controller
External Appearance SiUS281117 2. External Appearance Indoor Units Ceiling Mounted Cassette Type (Round Flow) FCQ18PAVJU FCQ24PAVJU FCQ30PAVJU FCQ36PAVJU FCQ42PAVJU Ceiling Suspended Type FHQ18PVJU FHQ24PVJU FHQ30PVJU FHQ36MVJU FHQ42MVJU Wall Mounted Type FAQ18PVJU FAQ24PVJU Ceiling Mounted Duct Type FBQ18PVJU FBQ24PVJU FBQ30PVJU FBQ36PVJU FBQ42PVJU Air Handling Unit FTQ18PAVJU...
Page 12: Part 2 Refrigerant Circuit
SiUS281117 External Appearance Remote Controller Wired Type BRC1D71 BRC1E71 Outdoor Units RZR18PVJU RZR24PVJU RZR30PVJU RZQ18PVJU9 RZQ24PVJU9 RZQ30PVJU RZR36PVJU RZR42PVJU RZQ36PVJU9 RZQ42PVJU9 General Information...
Page 13: Refrigerant Circuit
SiUS281117 Refrigerant Circuit 1. Refrigerant Circuit RZR18 / 24 / 30PVJU RZQ18 / 24PVJU9 RZQ30PVJU No. in refrigerant Electric Name Major Function system Symbol diagram Inverter compressor is operated on frequencies between 52 Hz and 177 Hz by using Inverter compressor (INV.) the inverter.
Page 14 Refrigerant Circuit SiUS281117 Refrigerant Circuit...
Page 15: Rzr36 / 42Pvju Rzq36 / 42Pvju(9)
SiUS281117 Refrigerant Circuit RZR36 / 42PVJU RZQ36 / 42PVJU(9) No. in refrigerant Electric Name Major Function system Symbol diagram Inverter compressor is operated on frequencies between 36 Hz and 195 Hz by using Inverter compressor (INV.) the inverter. 31 steps Because the system is of an air heat exchange type, the fan is operated at 8-step Inverter fan rotation speed by using the inverter.
Page 16 Refrigerant Circuit SiUS281117 Refrigerant Circuit...
Page 17: Functional Parts Layout
SiUS281117 Functional Parts Layout 2. Functional Parts Layout RZR18 / 24 / 30PVJU RZQ18 / 24PVJU9 RZQ30PVJU LEAD WIRE (HIGH VOLTAGE) LEAD WIRE (LOW VOLTAGE) LEAD WIRE (HIGH VOLTAGE) LEAD WIRE (LOW VOLTAGE) LEAD WIRE (HIGH VOLTAGE) LEAD WIRE (LOW VOLTAGE) THERMAL INSULATION TUBE LEAD WIRE...
Page 18: Part 3 Remote Controller
SiUS281117 Part 3 Remote Controller 1. Wired Remote Controller ..............12 1.1 Applicable Models .................. 12 1.2 Names and Functions ................13 1.3 MAIN/SUB Setting when Using 2 Remote Controllers......17 1.4 Centralized Control Group No. Setting ..........19 2. Wireless Remote Controller ..............22 2.1 Applicable Models ..................
Page 19: Wired Remote Controller
SiUS281117 Wired Remote Controller 1. Wired Remote Controller Applicable Models Model Series FCQ-PA FHQ-P FAQ-P FBQ-P FTQ- Wired Remote Controller with Weekly BRC1D71 — Schedule Timer Navigation Remote Controller BRC1E71 Remote Controller...
Page 20: Names And Functions
Wired Remote Controller SiUS281117 Names and Functions 1.2.1 BRC1D71 23 7 Figure 1 ON/OFF BUTTON EXTERNAL CONTROL ICON Press the ON/OFF button to start or stop the system. This icon indicates that another controller with higher priority is controlling or disabling your installation. OPERATION LAMP The operation lamp lights up during operation or blinks if CHANGE-OVER UNDER CENTRALIZED...
Page 21 SiUS281117 Wired Remote Controller 1 2 3 4 5 PROGRAMMING BUTTON FUNCTION ACTION ICONS This button is a multi-purpose button. These icons indicate the actions for each day of the Depending on the previous manipulations of the user, schedule timer. the programming button can have various functions.
Page 22 Wired Remote Controller SiUS281117 1.2.2 BRC1E71 1. Operation mode selector button 11. LCD (with backlight) 4. Up button 5. Down button 6. Right button 7. Left button 9. Operation lamp 8. On/Off button 3. Menu/OK button 10. Cancel button 2. Fan speed control button Functions other than basic operation items (i.e., On/Off, Operation mode selector, Fan speed control, and temperature settings) are set from the menu screen.
Page 23 SiUS281117 Wired Remote Controller 6. Right button  Used to highlight the next items on the right-hand side.  Each screen is scrolled in the right-hand direction. 7. Left button  Used to highlight the next items on the left-hand side. ...
Page 24: Main/Sub Setting When Using 2 Remote Controllers
Wired Remote Controller SiUS281117 MAIN/SUB Setting when Using 2 Remote Controllers Situation The MAIN/SUB setting is necessary when 1 indoor unit is controlled by 2 remote controllers. When you use 2 remote controllers (control panel and separate remote controller), set one to MAIN and the other to SUB.
Page 25 SiUS281117 Wired Remote Controller 1.3.2 BRC1E71 The designation of the main and sub remote controllers can be swapped. Note that this change requires turning the power OFF and then ON again. Basic screen Select "Main RC" is displayed. or "Sub RC" using the /...
Page 26: Centralized Control Group No. Setting
Wired Remote Controller SiUS281117 Centralized Control Group No. Setting 1.4.1 BRC1D71 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.
Page 27 SiUS281117 Wired Remote Controller 1.4.2 BRC1E71 In order to conduct the centralized remote control using the centralized remote controller and the unified ON/OFF controller, Group No. settings should be made by group using the operating remote controller. Make Group No. settings for centralized remote control using the operating remote controller. <Group Address (Unit)>...
Page 28 Wired Remote Controller SiUS281117 <Group Address (Group)> Basic screen is displayed. Press Press and hold Cancel Cancel button button for 4 seconds once. or more. Select "Group Address" and then press Menu/OK button. Service Item 2 is settings menu displayed. Press Cancel is displayed.
Page 29: Wireless Remote Controller
SiUS281117 Wireless Remote Controller 2. Wireless Remote Controller Applicable Models Model Series FCQ-PA FHQ-P FAQ-P FBQ-P Remote controller — BRC7E83 BRC7EA818 BRC4C82 Names and Functions 3P107422-11J Receiver 22 23 21 20 3P107422-17M 3P107422-8S FBQ (separate type) 3P107422-21S Remote Controller...
Page 30 Wireless Remote Controller SiUS281117 AIRFLOW DIRECTION ADJUST BUTTON DISPLAY “ ” (SIGNAL OPERATION MODE SELECTOR BUTTON TRANSMISSION) Press this button to select OPERATION This lights up when a signal is being MODE. transmitted. FILTER SIGN RESET BUTTON DISPLAY “ ” “ ”...
Page 31: Address And Main/Sub Setting
SiUS281117 Wireless Remote Controller Address and MAIN/SUB Setting Introduction To set the wireless remote controller, you have to set the address for:  The receiver of the wireless remote controller  The wireless remote controller. Setting the Address for the Receiver The address for the receiver of the wireless remote controller is factory setting to 1.
Page 32: Service Mode
Service Mode SiUS281117 3. Service Mode BRC1D71 3.1.1 Display Service Data Unit No. Mode No. Second Field Code No. Setting Mode First Code No. 1. Enter the field setting mode. Press the INSPECTION / TEST operation button for 4 seconds or more. 2.
Page 33 SiUS281117 Service Mode 3.1.2 Service Setting Mode No. Unit No. Mode No. Field Setting Mode Second Field Code No. Setting Mode First Code No. Second Code No. First Code No. 1. Enter the field setting mode. Continue to press the INSPECTION / TEST operation button for a minimum of 4 seconds. 2.
Page 34 Service Mode SiUS281117 Mode Function Content and Operation Example of Remote Controller Display Method Forced Fan Turns the fan ON for each unit UNIT No. individually. SETTING Individual Sets fan speed and airflow Setting direction for each unit speed individually when using group High 0: Upper control.
Page 35: Brc1E71
SiUS281117 Service Mode BRC1E71 Operating the remote controller allows service data to be acquired and various services to be set. Basic screen is displayed. Press Cancel Press button. Cancel Press and hold Cancel button button for 4 seconds or more. once.
Page 36 Service Mode SiUS281117 Maintenance Menu Item 2 Remarks 2.3. Indoor Unit Status 10.FLOAT 11.T1/T2 12.Unit No. Select the Unit No. you want to check. 13.Th1 Suction air thermistor 14.Th2 Heat exchanger thermistor 15.Th3 — 16.Th4 Discharge air thermistor 17.Th5 — 18.Th6 —...
Page 37: Inspection Mode
SiUS281117 Inspection Mode 4. Inspection Mode Unit Error code Inspection Normal display (No display) Error code blinks when an error occurs. INSPECTION/TEST 0 7 1...Capacity code Press the button. operation F...Indoor unit system code C...Indoor unit type code J...Progression code Unit Example of capacity code display Error code...
Page 38: Part 4 Function And Control
SiUS281117 Part 4 Function and Control 1. Function General ..................32 1.1 Operation Mode ..................32 2. Basic Control..................33 2.1 Normal Operation................... 33 2.2 Compressor PI Control ................34 2.3 Electronic Expansion Valve PI Control ..........35 2.4 Cooling Operation Fan Control .............. 36 3.
Page 39: Function General
SiUS281117 Function General 1. Function General Operation Mode Operation in stop mode Indoor unit stop or Indoor unit thermostat ON thermostat OFF Error/Standby Restart standby Pressure (Compressor stop) equalization prior to startup Error/ Standby Indoor unit stop or thermostat OFF Startup control •...
Page 40: Basic Control
Basic Control SiUS281117 2. Basic Control Normal Operation  Cooling Electric Symbol Operation Parts Name Symbol Remarks RZR18/24/30P RZR36/42P RZR18/24/30P RZR36/42P RZQ18/24/30P RZQ36/42P RZQ18/24/30P RZQ36/42P Used for high pressure protection control, low pressure protection control, discharge pipe Compressor Compressor  Compressor (INV.) temperature protection PI control...
Page 41: Compressor Pi Control
SiUS281117 Basic Control Compressor PI Control Compressor PI Control Low pressure equivalent saturation temperature (°F) TeS: Target Te value (Varies depending on Te setting, operating frequency, etc.) High pressure equivalent saturation temperature (°F) TcS: Target Tc value (Varies depending on Tc setting, operating frequency, etc.) 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.
Page 42: Electronic Expansion Valve Pi Control
Basic Control SiUS281117 RZR36/42P, RZQ36/42P INV. INV. INV. INV. INV. INV. (Full-load) (Unload) (Full-load) (Unload) (Full-load) (Unload) 36.0Hz 80.0Hz 140.0Hz 39.0Hz 86.0Hz 146.0Hz 43.0Hz 92.0Hz 152.0Hz 47.0Hz 98.0Hz 158.0Hz 52.0Hz 104.0Hz 164.0Hz 52.0Hz 57.0Hz 110.0Hz 170.0Hz 57.0Hz 64.0Hz 116.0Hz 175.0Hz 62.0Hz 71.0Hz 122.0Hz...
Page 43: Cooling Operation Fan Control
SiUS281117 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 outdoor unit fan. Pc: High pressure sensor detection value Pc >...
Page 44: Special Control
Special Control SiUS281117 3. Special Control Startup Control On activation, following control is performed to lighten load of the compressor by back liquid and the like. Also, the position of the four-way valve is defined. Pc: High-pressure sensor detection value Pe: Low-pressure sensor detection value 3.1.1 Startup Control in Cooling Electric Symbol...
Page 45: Oil Return Operation
SiUS281117 Special Control Oil Return Operation Oil flown from the compressor to the side of system is collected by oil return operation, in case of that oil in the compressor runs down. 3.2.1 Oil Return Operation in Cooling Tc: High pressure equivalent saturation temperature Te: Low pressure equivalent saturation temperature Ts: Suction pipe temperature detected by thermistor [Conditions to start]...
Page 46 Special Control SiUS281117 3.2.2 Oil Return Operation in Heating Pc: High-pressure sensor detection value Pe: Low-pressure sensor detection value Tc: High-pressure equivalent saturation temperature Te: Low-pressure equivalent saturation temperature Ts: Suction pipe temperature detected by thermistor [Conditions to start] The heating oil return operation is started referring following conditions. ...
Page 47: Defrosting Operation
SiUS281117 Special Control Defrosting Operation Pc: High-pressure sensor detection value Pe: Low-pressure sensor detection value Tc: High-pressure equivalent saturation temperature Te: Suction pipe equivalent saturation temperature The defrost operation is performed to solve frost on the outdoor unit heat exchanger when heating, and the heating capacity is recovered.
Page 48: Pump Down Residual Operation
Special Control SiUS281117 Pump Down Residual Operation Pe: Low pressure sensor detection value Td: Discharge pipe temperature When activating compressor, if the liquid refrigerant remains in the heat-exchanger, 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 heat- exchanger when the compressor is down.
Page 49: Restart Standby
SiUS281117 Special Control Restart Standby Ta: Outdoor air temperature Restart is stood by force to prevent frequent power-ON/OFF and to equalize pressure in the refrigerant system. Electric Symbol Parts Name Symbol Operation Remarks RZR18/24/32P RZR36/42P RZQ18/24/30P RZQ36/42P Compressor   (INV.) Outdoor unit Ta >...
Page 50: Pressure Equalization Prior To Startup
Special Control SiUS281117 Pressure Equalization Prior to Startup Ta: Outdoor air temperature Pc: High-pressure sensor detection value Pe: Low-pressure sensor detection value Before activating the compressor, the activation load is lightened by equalization across the compressor. In addition, inverters turn ON electricity and capacitors are charged. Electric Symbol Parts Name Symbol...
Page 51: Protection Control
SiUS281117 Protection Control 4. Protection Control High Pressure Protection Control Pc: High-pressure sensor detection value 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.
Page 52: Low Pressure Protection Control
Protection Control SiUS281117 Low Pressure Protection Control Pe: Low pressure sensor detection value This low pressure protection control is used to protect compressors against the transient decrease of low pressure. [Cooling] Low pressure not limited < 36 psi > 57 psi Low pressure limited 57Hz...
Page 53: Discharge Pipe Protection Control
SiUS281117 Protection Control Discharge Pipe Protection Control HTdi: Value of INV. compressor discharge pipe temperature (Tdi) compensated with outdoor air temperature Tp: Value of compressor port temperature calculated by Tc and Te, and suction superheated degree. This discharge pipe protection control is used to protect the compressor internal temperature against an error or transient increase of discharge pipe temperature.
Page 54: Inverter Protection Control
Protection Control SiUS281117 Inverter Protection Control Tb: Outdoor unit heat exchanger temperature Tfin: Radiation fin temperature Inverter current protection control and radiation fin temperature control are performed to prevent tripping due to an error, or transient inverter overcurrent, and radiation fin temperature increase. [Inverter overcurrent protection control] Not limited •...
Page 55: Other Control
SiUS281117 Other Control 5. Other Control Heating Operation Prohibition Heating operation is prohibited above 82°FDB outdoor air temperature. Function and Control...
Page 56: Outline Of Control (Indoor Unit)
Outline of Control (Indoor Unit) SiUS281117 6. Outline of Control (Indoor Unit) Drain Pump Control The drain pump is controlled by the ON/OFF buttons (4 button (1) - (4) given in the figure below). 6.1.1 When the Float Switch is Tripped while the Cooling Thermostat is Remote controller "...
Page 57 SiUS281117 Outline of Control (Indoor Unit) 6.1.3 When the Float Switch is Tripped during Heating Operation: Remote controller " " blinking abnormal stop Thermostat (running) Humidifier Reset Float switch Drain pump 5 min. 5 sec. 5 min. Note: During heating operation, if the float switch is not reset even after the 5 minutes operation, 5 seconds stop, 5 minutes operation cycle ends, operation continues until the switch is reset.
Page 58: Louver Control For Preventing Ceiling Dirt
Outline of Control (Indoor Unit) SiUS281117 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: Room Temperature Thermistor In Remote Controller
SiUS281117 Outline of Control (Indoor Unit) Room Temperature Thermistor in Remote Controller Temperature is controlled by both the room temperature thermistor in remote controller and suction air thermistor () in the indoor unit. (This is however limited to when the field setting for the room temperature thermistor in remote controller is set to “Use.”) Note: When outdoor air is introduced to the air conditioner with mixed into indoor air, the room...
Page 60 Outline of Control (Indoor Unit) SiUS281117 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 suction air thermistor () only, the unit may therefore be turned OFF by the thermostat before the lower part of the room reaches the set temperature.
Page 61: Thermostat Control With Operation Mode Set To "Auto
SiUS281117 Outline of Control (Indoor Unit) Thermostat Control with Operation Mode Set to "AUTO" When the operation mode is set to "AUTO" on the remote controller, the system will conduct the temperature control shown below. Furthermore, setting changes of the differential value (D°F) can be made according to information in the "Field settings from remote controller (P.70 and later)"...
Page 62: Freeze-Up Prevention
Outline of Control (Indoor Unit) SiUS281117 Freeze-up Prevention Freeze-up When the temperature detected by liquid pipe temperature thermistor (R2T) of the indoor unit Prevention by Off heat exchanger drops too low, the unit enters freeze-up prevention operation in accordance with the following conditions, and is also set in accordance with the conditions given below.
Page 63: View Of Operations Of Swing Flaps
SiUS281117 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 Setting the airflow Level Level Level defrosting direction Swinging Level Level Level Defrosting Setting the airflow Level Level Level...
Page 64: Hot Start Control (In Heating Operation Only)
Outline of Control (Indoor Unit) SiUS281117 Hot Start Control (In Heating Operation Only) At startup with thermostat ON or after the completion of defrosting in heating operation, the indoor unit fan is controlled to prevent cold air from blasting out and ensure startup capacity. [Detail of operation] When either the start condition 1 or the start condition 2 is established, the operations shown below will be conducted.
Page 65 SiUS281117 Outline of Control (Indoor Unit)  FTQ At startup with thermostat ON or after the completion of defrosting in heating operation, the indoor unit fan is controlled to prevent cold air from blasting out and ensure startup capacity. [Detail of operation] When either the start condition 1 or the start condition 2 is established, the operations shown below will be conducted.
Page 66: Heater Control (Ftq)
Outline of Control (Indoor Unit) SiUS281117 Heater Control (FTQ) 6.8.1 Auxiliary Heater Control If heating is insufficient in heat pump system alone, an electrical heater is to be used as the auxiliary heater. The following shows the ON/OFF conditions for the electric heater. Fan H tap Thermostat OFF/Stop operation 120 seconds ∗2...
Page 67 SiUS281117 Outline of Control (Indoor Unit) Condition A • Thermostat step 2 = "ON" • Heating mode • Not during test operation • Not during control operation & • High pressure condition = "ON" ∗3 • Liquid pipe temperature condition = "ON" ∗4 •...
Page 68 Outline of Control (Indoor Unit) SiUS281117 6.8.2 Heat Pump Lockout Mode During heating operation, users can select an electrical heater for heating. For this, signals are sent using ABC terminal of outdoor unit PCB. When the hot-water heating signal is received from the outdoor unit PCB, heating operation is performed only with the heater as manual backup operation.
Page 69: Step Thermostat Processing (Ftq)
SiUS281117 Outline of Control (Indoor Unit) Condition A • Heating mode • Thermostat step 1 = "ON" • Not during fan residual operation & • [Electrical heater setting] = "01" • [Electrical heater setting] = "03" & • Hot-water heater = "1" (ON) Condition B •...
Page 70: Interlocked With External Equipment (Ftq)
Outline of Control (Indoor Unit) SiUS281117 6.10 Interlocked with External Equipment (FTQ) 6.10.1 Humidifier When a humidifier is connected onsite, the fan operates with the airflow rate set of the remote controller or with the H tap. • Remote control operation = ON &...
Page 71 SiUS281117 Outline of Control (Indoor Unit) 6.10.2 Economizer When indoor and outdoor air temperatures are reversed, the compressor is stopped to let in the outdoor air to save energy. This operation is called economizer operation, and the equipment to detect indoor and outdoor air temperatures and open and close the damper to perform this operation is called an economizer.
Page 72: Part 5 Field Setting
SiUS281117 Part 5 Field Setting 1. Test Operation ..................66 1.1 Procedure and Outline ................66 1.2 Operation when Power is Turned ON ............ 69 2. Field Setting from Remote Controller............70 2.1 Wired Remote Controller ............... 70 2.2 Wireless Remote Controller ..............73 2.3 Setting Contents and Code No.
Page 73: Test Operation
SiUS281117 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. ...
Page 74 Test Operation SiUS281117 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 " " will be displayed.) ⎧...
Page 75 SiUS281117 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 82°FDB or higher, the unit can not be operated with heating mode. See the installation manual attached.) ...
Page 76: Operation When Power Is Turned On
Test Operation SiUS281117 Operation when Power is Turned ON 1.2.1 When Turning ON Power First Time The unit cannot be run for up to 12 minutes to automatically set the main power and address (indoor-outdoor address, etc.). Status Outdoor unit Test lamp H2P ..
Page 77: Field Setting From Remote Controller
SiUS281117 Field Setting from Remote Controller 2. Field Setting from Remote Controller Individual function of indoor unit can be changed from the remote controller. At the time of installation or after service inspection / repair, make the local setting in accordance with the following description.
Page 78 Field Setting from Remote Controller SiUS281117 2.1.2 BRC1E71 Press and hold Cancel button for <Basic screen> 4 seconds or more. Service settings menu is displayed. Select Field Settings in the Service Settings menu, and press Menu/OK button. Field settings screen is displayed.
Page 79 SiUS281117 Field Setting from Remote Controller Press Menu/OK button. Setting confirmation screen is displayed. <Setting confirmation screen> Select and press Menu/OK Field Settings button. Setting details are Save the settings? determined and field settings screen returns. Setting In the case of multiple setting changes, repeat “...
Page 80: Wireless Remote Controller
Field Setting from Remote Controller SiUS281117 Wireless Remote Controller MODE NO. FIELD SETTING MODE SECOND CODE NO. FIRST CODE NO. 1, 6 1. When in the normal mode, press the “ ” button for 4 seconds or more, and operation then enters the “field setting mode.”...
Page 81: Setting Contents And Code No. For Indoor Units
SiUS281117 Field Setting from Remote Controller Setting Contents and Code No. for Indoor Units : Factory setting Second Code No. Mode No. First Code Description of Setting Filter cleaning sign time Light Heavy — — 0 5 Filter dirt Light Heavy —...
Page 82 Field Setting from Remote Controller SiUS281117 2.3.1 Applicable Range of Field Setting Mode First Code No. Description of Setting     Filter cleaning sign time —  Filter dirt — — — —  Filter type — — —...
Page 83 SiUS281117 Field Setting from Remote Controller 2.3.2 Detailed Explanation of Setting Modes Filter Sign Setting If switching the filter sign ON time, set as given in the table below. Filter Specs. Lighting interval of the filter sign (hours) First Code Second Mode No.
Page 84 Field Setting from Remote Controller SiUS281117 Auto Restart after Power Failure Reset For the air conditioners with no setting for the function, 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 85 SiUS281117 Field Setting from Remote Controller 2.3.3 Setting of Operation Control Mode from Remote Controller (Local Setting) The operation control mode is compatible with a variety of controls and operations by limiting the functions of the operation remote controller. Furthermore, operations such as remote controller ON/OFF can be limited in accordance with the combination conditions.
Page 86 Field Setting from Remote Controller SiUS281117 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.
Page 87: Field Setting From Outdoor Unit
SiUS281117 Field Setting from Outdoor Unit 3. Field Setting from Outdoor Unit Location of DIP Switch and BS Button Outdoor Unit PCB (2) Set mode display (LED) (A2P) DIP switches (3) Mode setting switch H1P H2P H3P H4P H5P H6P H7P (DS1-1 and DS1-2) MODE RETURN...
Page 88: Setting By Dip Switches
Field Setting from Outdoor Unit SiUS281117 Setting by DIP Switches The following field settings are made by DIP switches on PCB. DIP switch Setting item Description Setting Cool/Heat Used to set cool/heat changeover setting by remote DS1-1 changeover OFF (Factory controller equipped with outdoor unit.
Page 89 SiUS281117 Field Setting from Outdoor Unit  Mode changing procedure Using the MODE button, the modes can be changed as follows. (Normal) Press and hold the BS1 Press the BS1 (MODE) (MODE) for 5 seconds. once. Monitor mode Setting mode 2 Setting mode 1 Press the BS1 (MODE) once.
Page 90: Setting Mode 1
Field Setting from Outdoor Unit SiUS281117 Setting Mode 1 This mode is used to set and check the current operating conditions (Normal / Abnormal / In check operation) Normally, “Setting mode 1” is set. In case of other status, press MODE button (BS1) once and set to “Setting mode 1”.
Page 91: Setting Mode 2
SiUS281117 Field Setting from Outdoor Unit Setting Mode 2 Press and hold the MODE button (BS1) for 5 seconds and set to Setting item Description “Setting mode 2”. Indoor unit forced Allows forced operation of indoor unit fan while unit is fan H stopped.
Page 92 Field Setting from Outdoor Unit SiUS281117 k: ON h: OFF l: Blink 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 k  Normal operation Indoor unit forced fan H k h h h h k h...
Page 93: Monitor Mode
SiUS281117 Field Setting from Outdoor Unit Monitor Mode k: ON h: OFF l: Blink To enter the monitor mode, press LED display Setting item Data display the MODE button (BS1) when in “Setting mode 1”. l h h h h h h Various settings See below l h h h k h k...
Page 94: Detailed Explanation Of Setting Modes
Field Setting from Outdoor Unit SiUS281117 Detailed Explanation of Setting Modes 3.7.1 Cool / Heat Mode Switching The Cool / Heat Mode switching is carried out by remote controller fitted to indoor unit. This setting is not required for normal operation. (Factory setting) 3.7.2 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...
Page 95 SiUS281117 Field Setting from Outdoor Unit 3. If necessary, while in "Setting mode 2", select the setting condition (i.e., "06:00", "07:00", or "08:00") for set item No. 27 (Setting of end time of low night noise operation). (Use the end time as a guide since it is estimated according to outdoor air temperatures.) 4.
Page 96 Field Setting from Outdoor Unit SiUS281117 3.7.3 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.
Page 97 SiUS281117 Field Setting from Outdoor Unit Image of operation in the case of A Power consumption The power Rated power consumption consumption during 80 % of rated power consumption Demand level 1 instructing Demand level 2 instructing Demand level 3 instructing the demand level 1 70 % of rated power consumption instructing can be...
Page 98 Field Setting from Outdoor Unit SiUS281117 Detailed Setting Procedure of Low Night Noise Operation and Demand Control 1. Setting mode 1 (H1P OFF) (1) In setting mode 2, press the BS1 (MODE button) once.  Setting mode 1 is entered and H1P OFF.
Page 99 SiUS281117 Field Setting from Outdoor Unit 3.7.4 Setting of Refrigerant Recovery Mode When carrying out the refrigerant collection on site, fully open the respective electronic expansion valve of indoor and outdoor units. Both the outdoor unit and the indoor unit are forbidden to operation. [Operation procedure] (1) In setting mode 2 with units in stop mode, set “Refrigerant Recovery / Vacuuming mode”...
Page 100 Field Setting from Outdoor Unit SiUS281117 3.7.6 Check Operation To prevent any trouble in the period of installation at site, the system is provided with a test operation mode enabling check for incorrect wiring, stop valve left in closed, and judgement of piping length.
Page 101: Part 6 Service Diagnosis
SiUS281117 Part 6 Service Diagnosis 1. Symptom-based Troubleshooting ............96 2. Troubleshooting by Remote Controller ..........99 2.1 Mode ChangeOver................. 99 2.2 Procedure of Self-diagnosis by Remote Controller ......100 2.3 Error Codes and Description..............103 2.4 Error Codes - Sub Codes..............104 2.5 Error Code Indication by Outdoor Unit PCB ........
Page 102 SiUS281117 2.41 Radiation Fin Thermistor Abnormality..........160 2.42 Refrigerant Shortage................161 2.43 Power Supply Voltage Abnormality............162 2.44 Check Operation not Executed ............164 2.45 Transmission Error (between Indoor Units and Outdoor Units) ... 165 2.46 Transmission Error (between Remote Controller and Indoor Unit) ..168 2.47 Transmission Error (between Main and Sub Remote Controllers)..
Page 103: Symptom-Based Troubleshooting
SiUS281117 Symptom-based Troubleshooting 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 104 Symptom-based Troubleshooting SiUS281117 Symptom Supposed Cause Countermeasure COOL-HEAT The remote controller displays This remote controller has no Use a remote controller with selection is "UNDER CENTRALIZED option to select cooling operation. option to select cooling operation. disabled. CONTROL". The remote controller displays COOL-HEAT selection is made Use the COOL-HEAT selection "UNDER CENTRALIZED...
Page 105 SiUS281117 Symptom-based Troubleshooting Symptom Supposed Cause Countermeasure 11 The system <Indoor unit> These are operating sounds of Normal operation. produces Immediately after turning ON the electronic expansion valve of This sound becomes low after a sounds. the power supply, indoor unit the indoor unit.
Page 106: Troubleshooting By Remote Controller
Troubleshooting by Remote Controller SiUS281117 2. Troubleshooting by Remote Controller Mode ChangeOver The following modes can be selected by using the [Inspection/Test Operation] button on the remote control. Depress the Inspection/Test Operation button for more than 4 seconds. Indoor unit settings can be made Service data can be obtained.
Page 107: Procedure Of Self-Diagnosis By Remote Controller
SiUS281117 Troubleshooting by Remote Controller Procedure of Self-diagnosis by Remote Controller 2.2.1 Wired Remote Controller — BRC1D71 If operation stops due to error, the remote controller’s operation LED blinks, and error code is displayed. (Even if stop operation is carried out, error contents are displayed when the inspection mode is entered.) The error code enables you to tell what kind of error caused operation to stop.
Page 108 Troubleshooting by Remote Controller SiUS281117 2.2.2 Wired Remote Controller — BRC1E71 The following will be displayed on the screen when an error (or a warning) occurs during operation. Check the error code and take the corrective action specified for the particular model. Screen Operation lamp (1) Checking an error or warning...
Page 109 SiUS281117 Troubleshooting by Remote Controller 2.2.3 Wireless Remote Controller If unit stops due to an error, the operation indicating LED on the signal receiving part of indoor unit blinks. The error code can be determined by following the procedure described below. (The error code is displayed when an operation error has occurred.
Page 110: Error Codes And Description
Troubleshooting by Remote Controller SiUS281117 Error Codes and Description Error code Contents of Error Page Referred Indoor Unit Error of External Protection Device Indoor Unit PCB Abnormality Drain Water Level System Abnormality Indoor Unit Fan Motor Abnormality Swing Flap Motor Abnormality / Lock Abnormal Power Supply Voltage Electronic Expansion Valve Coil Abnormality Drain System Abnormality...
Page 111: Error Codes - Sub Codes
SiUS281117 Troubleshooting by Remote Controller Error Codes - Sub Codes If an error code like the one shown below is displayed when the navigation remote controller (BRC1E71) is in use, make a detailed diagnosis or a diagnosis of the relevant unit referring to the attached list of detailed error codes.
Page 112 Troubleshooting by Remote Controller SiUS281117 2.4.2 Outdoor Unit Troubleshooting Error code Description of error Description of diagnosis E7 - 01 Fan motor lock The fan motor has caused abnormal rotation. Check for the connection of the connector between the fan motor and the outdoor unit PCB.
Page 113 SiUS281117 Troubleshooting by Remote Controller Troubleshooting Error code Description of error Description of diagnosis U0 - 02 Gas shortage - Outdoor unit (Factor 0) This error results from a shortage of refrigerant. Refer to the “U0” Troubleshooting flow chart and make a diagnosis, and then take countermeasures.
Page 114: Error Code Indication By Outdoor Unit Pcb
Troubleshooting by Remote Controller SiUS281117 Error Code Indication by Outdoor Unit PCB <Monitor mode> To enter the monitor mode, press the Contents of Error Error code MODE (BS1) button when in In-phase error of DIII-Net Detection of DIII-Net “Setting mode 1”. Discharge pressure Abnormality HPS activated Suction pressure Abnormality...
Page 115 SiUS281117 Troubleshooting by Remote Controller k: ON h: OFF l: Blink Confirmation of Error 1 Confirmation of Error 2 Confirmation of Error 3 Confirmation of Error 4 Error 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: Error Of External Protection Device
Troubleshooting by Remote Controller SiUS281117 Error of External Protection Device Remote Controller Display Applicable All indoor models Models Method of Error Detect open or short circuit between external input terminals in indoor unit. Detection Error Decision When an open circuit occurs between external input terminals with the remote controller set to Conditions "external ON/OFF terminal".
Page 117: Indoor Unit Pcb Abnormality
SiUS281117 Troubleshooting by Remote Controller Indoor Unit PCB Abnormality Remote Controller Display Applicable All indoor models Models Method of Error Check data from E²PROM. Detection Error Decision The error is generated when the data from the E²PROM is not received correctly. Conditions E²PROM (Electrically Erasable Programmable Read Only Memory): A memory chip that holds its content without power.
Page 118: Drain Water Level System Abnormality
Troubleshooting by Remote Controller SiUS281117 Drain Water Level System Abnormality Remote Controller Display Applicable FCQ, FHQ (Option), FAQ (Option), FTQ Models Method of Error By float switch OFF detection Detection Error Decision The error is generated when the water level reaches its upper limit and when the float switch Conditions turns OFF.
Page 119 SiUS281117 Troubleshooting by Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the drain Is the short circuit pump mechanism connector connected to Short circuit connector connected? the indoor unit connection...
Page 120: Indoor Unit Fan Motor Abnormality
Troubleshooting by Remote Controller SiUS281117 Indoor Unit Fan Motor Abnormality Remote Controller Display Applicable All indoor models Models Method of Error Detection of abnormal fan revolution by signal from the fan motor Detection Error Decision The error is generated when the fan revolution do not increase while the output voltage to the Conditions fan is at its maximum.
Page 121 SiUS281117 Troubleshooting by Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn OFF the power supply. Wait for 10 min. Is there any Remove the foreign matter. foreign matter around the fan? Is the fan...
Page 122: Swing Flap Motor Abnormality / Lock
Troubleshooting by Remote Controller SiUS281117 2.10 Swing Flap Motor Abnormality / Lock Remote Controller Display Applicable FCQ, FHQ, FAQ Models Method of Error The error is detected by the limit switch when the motor turns. Detection Error Decision When ON/OFF of the micro-switch for position detection cannot be reversed even though the Conditions swing flap motor is energized for a specified amount of time (about 30 seconds).
Page 123 SiUS281117 Troubleshooting by Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the connector (∗1) Connect correctly. correctly connected? the limit switch's transfer Connect correctly. connector correctly connected? Turn the power supply OFF once and back ON, and check...
Page 124: Abnormal Power Supply Voltage
Troubleshooting by Remote Controller SiUS281117 2.11 Abnormal Power Supply Voltage Remote Controller Display Applicable Models Method of Error Detect error checking the input voltage of fan motor Detection Error Decision When the input voltage of fan motor is 150V and less, or 420V and more Conditions ...
Page 125: Electronic Expansion Valve Coil Abnormality
SiUS281117 Troubleshooting by Remote Controller 2.12 Electronic Expansion Valve Coil Abnormality Remote Controller Display Applicable All indoor models Models Method of Error Check the coil condition of electronic expansion valve by using micro-computer. Detection Error Decision Pin input for electronic expansion valve coil is abnormal when initializing micro-computer. Conditions ...
Page 126 Troubleshooting by Remote Controller SiUS281117 1: Coil check method for the electronic expansion valve coil Discount the electronic expansion valve from the PCB and check the continuity between the connector pins. (Normal) Pin No. 1. White 2. Yellow 3. Orange 4.
Page 127: Drain System Abnormality
SiUS281117 Troubleshooting by Remote Controller 2.13 Drain System Abnormality Remote Controller Display Applicable All indoor models Models Method of Error Water leakage is detected based on float switch ON/OFF operation while the compressor is in Detection non-operation. Error Decision The float switch changes from ON to OFF while the compressor is OFF. ...
Page 128: Capacity Setting Abnormality
Troubleshooting by Remote Controller SiUS281117 2.14 Capacity Setting Abnormality Remote Controller Display Applicable All indoor models Models Method of Error Capacity is determined according to resistance of the capacity setting adaptor and the memory Detection inside the IC memory on the indoor unit PCB, and whether the value is normal or abnormal is determined.
Page 129: Transmission Error Between Indoor Unit Pcb And Fan Pcb
SiUS281117 Troubleshooting by Remote Controller 2.15 Transmission Error between Indoor Unit PCB and Fan Remote Controller Display Applicable Models Method of Error Check the condition of transmission between indoor unit PCB and fan PCB using computer. Detection Error Decision When normal transmission is not conducted for certain duration. Conditions ...
Page 130 Troubleshooting by Remote Controller SiUS281117 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the connector between indoor unit PCB (A1P) Connect the connector and fan PCB (A2P) accurately.
Page 131: Heat Exchanger (Liquid Pipe) Thermistor Abnormality
SiUS281117 Troubleshooting by Remote Controller 2.16 Heat Exchanger (Liquid pipe) Thermistor Abnormality Remote Controller Display Applicable All indoor models Models Method of Error The error is detected by temperature detected by heat exchanger thermistor. Detection Error Decision When the heat exchanger thermistor becomes disconnected or shorted while the unit is running Conditions ...
Page 132: Heat Exchanger (Gas Pipe) Thermistor Abnormality
Troubleshooting by Remote Controller SiUS281117 2.17 Heat Exchanger (Gas Pipe) Thermistor Abnormality Remote Controller Display Applicable All indoor models Models Method of Error The error is detected by temperature detected by gas pipe thermistor. Detection Error Decision When the gas pipe thermistor becomes disconnected or shorted while the unit is running Conditions ...
Page 133: Combination Error Between Indoor Unit Pcb And Fan Pcb
SiUS281117 Troubleshooting by Remote Controller 2.18 Combination Error between Indoor Unit PCB and Fan Remote Controller Display Applicable Models Method of Error Conduct open line detection with fan PCB (A2P) using indoor unit PCB (A1P). Detection Error Decision When the communication data of fan PCB is determined as incorrect. Conditions ...
Page 134: Suction Air Thermistor Abnormality
Troubleshooting by Remote Controller SiUS281117 2.19 Suction Air Thermistor Abnormality Remote Controller Display Applicable FCQ, FHQ, FAQ, FBQ Models Method of Error The error is detected by temperature detected by suction air thermistor. Detection Error Decision When the suction air thermistor becomes disconnected or shorted while the unit is running Conditions ...
Page 135: Humidity Sensor System Abnormality
SiUS281117 Troubleshooting by Remote Controller 2.20 Humidity Sensor System Abnormality Remote Controller Display Applicable Models Method of Error The error is detected according to the humidity (output voltage) detected by humidity sensor. Detection Error Decision The error is generated when the humidity sensor becomes disconnected or shorted when the Conditions unit is running.
Page 136: Room Temperature Thermistor In Remote Controller Abnormality
Troubleshooting by Remote Controller SiUS281117 2.21 Room Temperature Thermistor in Remote Controller Abnormality Remote Controller Display Applicable All indoor models Models Method of Error Error detection is carried out by temperature detected by room temperature thermistor in remote Detection controller. (1) Error Decision When the room temperature thermistor in remote controller becomes disconnected or shorted Conditions...
Page 137: Outdoor Unit Pcb Abnormality
SiUS281117 Troubleshooting by Remote Controller 2.22 Outdoor Unit PCB Abnormality Remote Controller Display Applicable RZR, RZQ Models Method of Error Micro-computer checks whether E PROM is normal. Detection Error Decision When E PROM error when turning the power supply ON Conditions ...
Page 138: High Pressure Abnormality
Troubleshooting by Remote Controller SiUS281117 2.23 High Pressure Abnormality Remote Controller Display Applicable RZR, RZQ Models Method of Error Abnormality is detected when the contact of the high pressure switch opens. Detection Error Decision Error is generated when the S1PH (High pressure switch) activation count reaches the number Conditions specific to the operation mode.
Page 139 SiUS281117 Troubleshooting by Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, 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 outdoor unit main PCB? Is these continuity with the high pressure switch? Are the three points...
Page 140: Actuation Of Low Pressure Sensor
Troubleshooting by Remote Controller SiUS281117 2.24 Actuation of Low Pressure Sensor Remote Controller Display Applicable RZR, RZQ Models Method of Error Abnormality is detected by the pressure value with the low pressure sensor. Detection Error Decision Error is generated when the low pressure is dropped during compressor operating. Conditions Operating pressure: 10 psi ...
Page 141 SiUS281117 Troubleshooting by Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, 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 142: Inverter Compressor Motor Lock
Troubleshooting by Remote Controller SiUS281117 2.25 Inverter Compressor Motor Lock Remote Controller Display Applicable RZR, RZQ Models Method of Error Detect the motor lock when the compressor is energized. Detection Error Decision If the motor rotor does not rotate when the compressor is energized. Conditions ...
Page 143 SiUS281117 Troubleshooting by Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the installation conditions. Is the stop valve open? Open the stop valve. Check and see whether compressor is short- Replace the compressor.
Page 144: Outdoor Unit Fan Motor Abnormality
Troubleshooting by Remote Controller SiUS281117 2.26 Outdoor Unit Fan Motor Abnormality Remote Controller Display Applicable RZR, RZQ Models Method of Error The error is detected according to the revolution speed detected by hall IC when the fan motor Detection runs. ...
Page 145: Electronic Expansion Valve Coil Abnormality
SiUS281117 Troubleshooting by Remote Controller 2.27 Electronic Expansion Valve Coil Abnormality Remote Controller Display Applicable RZR, RZQ Models Method of Error Detect errors based on check of continuity of the electronic expansion valve. Detection Detect errors by suction pipe superheated degree, discharge pipe superheated degree and electronic expansion valve opening degree.
Page 146 Troubleshooting by Remote Controller SiUS281117 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Turn OFF the power supply once and then turn it ON again. Does the error code "...
Page 147 SiUS281117 Troubleshooting by Remote Controller Are the characteristics of each thermistor normal? Replace the defective thermistor. CHECK 5 Are the pressure sensor Replace the pressure sensor. characteristics normal? CHECK 6 Actually, it is in wet operation. Refer to CHECK 7 eliminate the causes of wet operation.
Page 148: Discharge Pipe Temperature Control Error
Troubleshooting by Remote Controller SiUS281117 2.28 Discharge Pipe Temperature Control Error Remote Controller Display Applicable RZR, RZQ Models Method of Error Abnormality is detected according to the temperature detected by the discharge pipe thermistor. Detection Error Decision When the discharge pipe temperature rises to an abnormally high level Conditions When the discharge pipe temperature rises suddenly When the discharge pipe temperature does not rise after operation start...
Page 149 SiUS281117 Troubleshooting by Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the discharge pipe Abnormality in refrigerant temperature high? system such as refrigerant (248°F) shortage, defective compressor, etc.
Page 150: Refrigerant Overcharged
Troubleshooting by Remote Controller SiUS281117 2.29 Refrigerant Overcharged Remote Controller Display Applicable RZR, RZQ Models Method of Error Excessive charging of refrigerant is detected by using the outdoor air temperature and heat Detection exchanger deicer temperature during check operation. Error Decision When the amount of refrigerant, which is calculated by using the outdoor air temperature and Conditions heat exchanging deicer temperature during check operation, exceeds the criteria.
Page 151: High Pressure Switch System Abnormality
SiUS281117 Troubleshooting by Remote Controller 2.30 High Pressure Switch System Abnormality Remote Controller Display Applicable RZR, RZQ Models Method of Error The protection device circuit checks continuity in the high pressure switch. Detection Error Decision When there is no continuity in the high pressure switch during compressor stops operating Conditions ...
Page 152: Outdoor Unit Fan Motor Signal Abnormality
Troubleshooting by Remote Controller SiUS281117 2.31 Outdoor Unit Fan Motor Signal Abnormality Remote Controller Display Applicable RZR, RZQ Models Method of Error Detection of abnormal signal from fan motor Detection Error Decision In case of detection of abnormal signal at starting fan motor Conditions ...
Page 153: Thermistor System Abnormality
SiUS281117 Troubleshooting by Remote Controller 2.32 Thermistor System Abnormality H9, J3, J5, J6 Remote Controller Display Applicable RZR, RZQ Models Method of Error The error is detected from the temperature detected by each thermistor. Detection Error Decision When thermistor is disconnected or short-circuited during operation Conditions ...
Page 154: High Pressure Sensor Abnormality
Troubleshooting by Remote Controller SiUS281117 2.33 High Pressure Sensor Abnormality Remote Controller Display Applicable RZR, RZQ Models Method of Error The error is detected from the pressure detected by the high pressure sensor. Detection Error Decision When the high pressure sensor is short-circuit or open circuit Conditions ...
Page 155 SiUS281117 Troubleshooting by Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. high pressure sensor is connected to Connect the high pressure sensor X17A of outdoor unit and turn ON again.
Page 156: Low Pressure Sensor Abnormality
Troubleshooting by Remote Controller SiUS281117 2.34 Low Pressure Sensor Abnormality Remote Controller Display Applicable RZR, RZQ Models Method of Error The error is detected from the pressure detected by the low pressure sensor. Detection Error Decision When the low pressure sensor is short circuit or open circuit Conditions ...
Page 157 SiUS281117 Troubleshooting by Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. The low pressure sensor is connected to X18A of Connect the low pressure sensor outdoor unit PCB property and turn ON again.
Page 158: Outdoor Unit Pcb Abnormality
Troubleshooting by Remote Controller SiUS281117 2.35 Outdoor Unit PCB Abnormality Remote Controller Display Applicable Models  Detect error by current value during waveform output before compressor startup. Method of Error  Detect error by current sensor value during synchronized operation at the time of startup. Detection ...
Page 159 SiUS281117 Troubleshooting by Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the power supply voltage Request an improvement to between 180 and make the power supply 220 VAC? voltage fall within the standard range.
Page 160: Radiation Fin Temperature Rise
Troubleshooting by Remote Controller SiUS281117 2.36 Radiation Fin Temperature Rise Remote Controller Display Applicable RZR, RZQ Models Method of Error Radiation fin temperature is detected by radiation fin thermistor. Detection Error Decision When the temperature of the inverter radiation fin rises abnormally due to defective heat Conditions dissipation.
Page 161: Momentary Overcurrent Of Inverter Compressor
SiUS281117 Troubleshooting by Remote Controller 2.37 Momentary Overcurrent of Inverter Compressor Remote Controller Display Applicable RZR, RZQ Models Method of Error The error is detected from current flowing in the power transistor. Detection Error Decision When overcurrent flows in the power transistor Conditions (Instantaneous overcurrent also causes activation) ...
Page 162: Electronic Thermal (Time Lag)
Troubleshooting by Remote Controller SiUS281117 2.38 Electronic Thermal (Time Lag) Remote Controller Display Applicable RZR, RZQ Models Method of Error The error is detected from the current flowing to power transistor into voltage with CT1 (DC Detection current sensor). Error Decision When compressor overload (except for when startup) is detected.
Page 163 SiUS281117 Troubleshooting by Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Output current check secondary current of the inverter Compressor overload. is higher than A (∗1) for Inspection of the compressor and each phase.
Page 164: Inverter Startup Error
Troubleshooting by Remote Controller SiUS281117 2.39 Inverter Startup Error Remote Controller Display Applicable RZR, RZQ Models Method of Error The error is detected from the current flowing to power transistor into voltage with CT1 (DC Detection current sensor). Inverter PCB detects the disorder of position signal. Error Decision When compressor overload (when startup) is detected Conditions...
Page 165 SiUS281117 Troubleshooting by Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Check the installation conditions. Open the stop valve. Is the stop valve open? Is the difference between high and low Insufficient pressure...
Page 166: Transmission Error (Between Control And Inverter Pcb)
Troubleshooting by Remote Controller SiUS281117 2.40 Transmission Error (between Control and Inverter PCB) Remote Controller Display Applicable RZR, RZQ Models Method of Error Check the communication state between inverter PCB and control PCB by micro-computer. Detection Error Decision When the correct communication is not carried out in certain period of time or longer Conditions ...
Page 167: Radiation Fin Thermistor Abnormality
SiUS281117 Troubleshooting by Remote Controller 2.41 Radiation Fin Thermistor Abnormality Remote Controller Display Applicable RZR, RZQ Models Method of Error Detection by open or short circuit of the radiation fin thermistor during the compressor stops Detection operating. Error Decision When open or short circuit of the radiation fin thermistor is detected during the compressor Conditions stops operating ...
Page 168: Refrigerant Shortage
Troubleshooting by Remote Controller SiUS281117 2.42 Refrigerant Shortage Remote Controller Display Applicable RZR, RZQ Models Method of Error Refrigerant shortage is detected according to the electronic expansion valve opening degree Detection and measured temperatures and pressures. Error Decision (In cooling operation) Conditions When the electronic expansion valve opens fully and low pressure is below 14.5 psi continuously for 30 minutes.
Page 169: Power Supply Voltage Abnormality
SiUS281117 Troubleshooting by Remote Controller 2.43 Power Supply Voltage Abnormality Remote Controller Display Applicable RZR, RZQ Models Method of Error The error is detected according to the voltage of main circuit capacitor built in the inverter and Detection power supply voltage. Error Decision When the abnormal voltage of main circuit capacitor built in the inverter and abnormal power Conditions...
Page 170 Troubleshooting by Remote Controller SiUS281117 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the power Correct power supply. supply voltage 208~230V ±10%? CHECK 4 Check the inverter power transistor. Is the power Replace the inverter PCB.
Page 171: Check Operation Not Executed
SiUS281117 Troubleshooting by Remote Controller 2.44 Check Operation not Executed Remote Controller Display Applicable Models Method of Error Check operation is executed or not. Detection Error Decision The error is decided when the unit starts operation without check operation. Conditions ...
Page 172: Transmission Error (Between Indoor Units And Outdoor Units)
Troubleshooting by Remote Controller SiUS281117 2.45 Transmission Error (between Indoor Units and Outdoor Units) Remote Controller Display Applicable All indoor models Models RZR, RZQ Method of Error Micro-computer checks if transmission between indoor and outdoor units is normal. Detection Error Decision When transmission is not carried out normally for a certain amount of time or longer Conditions ...
Page 173 SiUS281117 Troubleshooting by Remote Controller Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Is the power Request an supply voltage 208- 230V? improvement to make the power supply voltage fall within the standard range.
Page 174 Troubleshooting by Remote Controller SiUS281117 Check the resistance value of the outdoor unit fan motor. Is the resistance value of the Replace the outdoor unit outdoor unit fan motor fan motor. normal? Does the fuse (F6U) Replace the fuse. have continuity? Check the fan speed pulse.
Page 175: Transmission Error (Between Remote Controller And Indoor Unit)
SiUS281117 Troubleshooting by Remote Controller 2.46 Transmission Error (between Remote Controller and Indoor Unit) Remote Controller Display Applicable All indoor models Models Method of Error Micro-computer checks if transmission between indoor unit and remote controller is normal. Detection Error Decision The error is generated when the micro-processor detects that the transmission between the Conditions indoor unit and the remote controller is not normal over a certain amount of time.
Page 176: Transmission Error (Between Main And Sub Remote Controllers)
Troubleshooting by Remote Controller SiUS281117 2.47 Transmission Error (between Main and Sub Remote Controllers) Remote Controller Display Applicable All indoor models Models Method of Error In case of controlling with 2-remote controller, check the system using micro-computer if signal Detection transmission between indoor unit and remote controller (main and sub) is normal.
Page 177: (Between Centralized Remote Controller And Indoor Unit)
SiUS281117 Troubleshooting by Remote Controller 2.48 Transmission Error (between Centralized Remote Controller and Indoor Unit) Remote Controller Display Applicable All indoor models Centralized controller Models Method of Error Micro-computer checks if transmission between indoor unit and centralized remote controller is Detection normal.
Page 178 Troubleshooting by Remote Controller SiUS281117 Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors, or parts may be damaged. Has an indoor unit once connected been removed Reset power supply or its address simultaneously for all optional changed? controllers for centralized control.
Page 179: System Is Not Set Yet
SiUS281117 Troubleshooting by Remote Controller 2.49 System is not Set yet Remote Controller Display Applicable All indoor models Models RZR, RZQ Method of Error On check operation, the capacity of indoor units in terms of transmission is not corresponding to Detection that of indoor units that have made changes in temperature.
Page 180: Check
Troubleshooting by Remote Controller SiUS281117 2.50 Check CHECK 1 Check for causes of rise in high pressure Referring to the Fault Tree Analysis (FTA) shown below, probe the error points. ←Check to be sure the stop valve is open. Stop valve closed Local High pipe ←Conduct visual checks for pipe conditions.
Page 181 SiUS281117 Troubleshooting by Remote Controller CHECK 2 Check for causes of drop in low pressure Referring to the Fault Tree Analysis (FTA) shown below, probe the error points. [In cooling] ←Are the electrical characteristics normal? Defective low pressure sensor Defective compressor ←Is the pressure value checked with the Service Checker Defective...
Page 182 Troubleshooting by Remote Controller SiUS281117 CHECK 3 Check for Fan Motor Connector Check on connector of fan motor (Power supply cable) 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 183 SiUS281117 Troubleshooting by Remote Controller CHECK 4 Check for Power Transistor Judgement is made through cable check with an analog tester. (1) Do not touch the energized part (high voltage part) for at least 10 minutes after the power is turned OFF.
Page 184 Troubleshooting by Remote Controller SiUS281117 CHECK 5 Check the Thermistors Thermistors If the cause of the problem is related to the thermistors, then the thermistors should be checked prior to changing the PCB. For more information about these thermistors, see: ...
Page 185 SiUS281117 Troubleshooting by Remote Controller Thermistor Resistance / Temperature Characteristics Table 1 Table 2 Table 3 T°F k T°F k T°F k 354.1 361.7719 3257.371 259.7 265.4704 2429.222 192.6 196.9198 1827.883 144.2 147.5687 1387.099 109.1 111.6578 1061.098 83.25 85.2610 817.9329 64.10 65.6705 635.0831...
Page 186 Troubleshooting by Remote Controller SiUS281117 CHECK 6 Check Pressure Sensor Measure the voltage (DC) between pins 1 and 3 of the connector. Outdoor unit PCB (A1P) Connector Red Black Micro-computer White A/D input Measure DC voltage here. Detected Pressure (Kg/cm²) MPa 51.0 45.9 40.8...
Page 187 SiUS281117 Troubleshooting by Remote Controller CHECK 7 Check for causes of wet operation. Referring to the Fault Tree Analysis (FTA) shown below, identify defective points. Defective crankcase heater Refrigerant accumulation Frequent ON/OFF of compressor Overcharge of refrigerant Defective ←Does the valve coil have normal Defective valve coil indoor unit resistance and insulation?
Page 188 Troubleshooting by Remote Controller SiUS281117 CHECK 8 Clogged Points Temperature differences must occur before or after the clogged points! COMP Indoor Unit Outdoor Unit Check points Check factor Causes Remedies  Dust Around Temperature Replace the electronic  Choked moisture expansion difference expansion valve.
Page 189: Part 7 Appendix
SiUS281117 Part 7 Appendix 1. Piping Diagrams..................183 1.1 Indoor Unit + Outdoor Unit ..............183 1.2 Indoor Unit ................... 185 2. Wiring Diagrams .................187 2.1 Outdoor Unit..................187 2.2 Indoor Unit ................... 189 Appendix...
Page 190: Piping Diagrams
Piping Diagrams SiUS281117 1. Piping Diagrams Indoor Unit + Outdoor Unit FCQ18PAVJU / FHQ18PVJU / FAQ18PVJU / FBQ18PVJU + RZR18PVJU / RZQ18PVJU9 FCQ24PAVJU / FHQ24PVJU / FAQ24PVJU / FBQ24PVJU + RZR24PVJU / RZQ24PVJU9 FCQ30PAVJU / FHQ30PVJU / FBQ30PVJU + RZR30PVJU / RZQ30PVJU Appendix...
Page 191 SiUS281117 Piping Diagrams RZQ36PVJU9 / RZR36PVJU RZQ42PVJU9 / RZR42PVJU Electronic expansion valve Double pipe Fusible Electronic heat exchanger plug expansion valve Filter Heat exchanger Pressure regulating valve Filter Service port Four way valve High pressure Service port sensor Low pressure S1NPH sensor Filter...
Page 192: Indoor Unit
Piping Diagrams SiUS281117 Indoor Unit FCQ36PAVJU / FCQ42PAVJU FHQ36MVJU / FHQ42MVJU Gas pipe connection port Heat exchanger Liquid pipe connection port Filter Filter Electronic expansion valve 4D024460F FBQ36PVJU / FBQ42PVJU Gas pipe connection port Heat exchanger Liquid pipe connection port Filter Filter Electronic...
Page 193 SiUS281117 Piping Diagrams FTQ18PAVJU FTQ24PAVJU Gas pipe connection port Heat exchanger Field piping Liquid pipe connection port Filter Filter Field piping Electronic expansion valve C: 4D068194 Appendix...
Page 194: Wiring Diagrams
Wiring Diagrams SiUS281117 2. Wiring Diagrams Outdoor Unit RZR18PVJU / RZR24PVJU / RZR30PVJU RZQ18PVJU9 / RZQ24PVJU9 / RZQ30PVJU Appendix...
Page 195 SiUS281117 Wiring Diagrams RZR36PVJU / RZR42PVJU RZQ36PVJU9 / RZQ42PVJU9 Appendix...
Page 196: Indoor Unit
Wiring Diagrams SiUS281117 Indoor Unit FCQ18PAVJU / FCQ24PAVJU / FCQ30PAVJU FCQ36PAVJU / FCQ42PAVJU Appendix...
Page 197 SiUS281117 Wiring Diagrams FHQ18PVJU / FHQ24PVJU / FHQ30PVJU FHQ36MVJU / FHQ42MVJU Appendix...
Page 198 Wiring Diagrams SiUS281117 FAQ18PVJU / FAQ24PVJU Appendix...
Page 199 SiUS281117 Wiring Diagrams FBQ18PVJU / FBQ24PVJU / FBQ30PVJU / FBQ36PVJU / FBQ42PVJU Appendix...
Page 200 Wiring Diagrams SiUS281117 FTQ18PAVJU / FTQ24PAVJU R1T R2T INPUT FROM OUTSIDE NOTE)3 t° t° TRANSMISSION WIRING POWER CENTRALIZED REMOTE SUPPLY CONTROLLER NOTE ) 2 X18A X17A X15A NOTE) 7 T1R X30A X27A RED X1 (240V) X4 ORG 208/230V X2 (208V) WIRED REMOTE 60Hz X35A...
Page 201 SiUS281117 Wiring Diagrams Appendix...
Page 202 Be sure to follow these instructions and warnings. If you have any inquiries, please contact your local importer, distributor and/or retailer. Daikin, Daikin AC Absolute Comfort, and its design, VRV, REFNET, and Quaternity are trademarks of Daikin Industries, LTD. All rights reserved. Cautions on product corrosion 1.

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