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SiUS071735EB

Troubleshooting

Service Diagnosis

4. Troubleshooting

4.1 Error Codes and Description

Error Codes

Description

Reference

Page

System

Normal

—

Refrigerant shortage

—

Low-voltage detection or over-voltage detection

Signal transmission error (between indoor unit and outdoor unit)

Mismatching of indoor unit and outdoor unit

Indoor

Unit

Indoor unit PCB abnormality

Drain level control system abnormality

Indoor fan motor (DC motor) or related abnormality

Indoor fan PCB abnormality

Humidifier or related abnormality

Indoor heat exchanger thermistor 1 or related abnormality

Indoor heat exchanger thermistor 2 or related abnormality

Room temperature thermistor or related abnormality

Remote controller thermistor abnormality

Signal transmission error (between indoor unit and remote

controller)

Signal transmission error (between MAIN remote controller and

SUB remote controller)

Outdoor

Unit

Outdoor unit PCB abnormality

OL activation (compressor overload)

OL activation (compressor overload) or HPS activation (high

pressure switch)

Compressor lock

DC fan lock (outdoor fan motor)

Input overcurrent detection

Four way valve abnormality

Discharge pipe temperature control

High pressure control in cooling

System shutdown due to temperature abnormality in compressor

Compressor system sensor abnormality

Position sensor abnormality

DC voltage/current sensor abnormality

Outdoor temperature thermistor or related abnormality

Discharge pipe thermistor or related abnormality

Outdoor heat exchanger thermistor or related abnormality

Electrical box temperature rise

101

Radiation fin temperature rise

102

Output overcurrent detection

103

Radiation fin thermistor or related abnormality

Summary of Contents for FDMQ09RVJU

Page 1: ...Service Manual Inverter Pair Duct Connected Type FDMQ R Series SiUS071735EB Applied Models Inverter Pair Heat Pump ...

Page 2: ...nected Type FDMQ R Series Heat Pump Indoor Unit FDMQ09RVJU FDMQ12RVJU FDMQ15RVJU FDMQ18RVJU FDMQ24RVJU Outdoor Unit RX09RMVJU RX09RMVJU9 RX09RMVJU9A RX12RMVJU RX12RMVJU9 RX12RMVJU9A RX15RMVJU RX15RMVJUA RX18RMVJU RX18RMVJU9 RX18RMVJU9A RX24RMVJU RX24RMVJUA ...

Page 3: ...Control 16 1 Main Functions 17 1 1 Temperature Control 17 1 2 Frequency Principle 17 1 3 Fan Speed Control for Indoor Unit 19 1 4 Program Dry Operation 20 1 5 Clock and Calendar Setting With Wired Remote Controller BRC1E73 21 1 6 Schedule TIMER Operation With Wired Remote Controller BRC1E73 23 1 7 Drain Pump Control 26 1 8 Hot Start Control In Heating Operation Only 28 1 9 Other Functions 29 2 Con...

Page 4: ...istor Abnormality 72 4 9 Signal Transmission Error Between Indoor Unit and Remote Controller 73 4 10 Signal Transmission Error Between MAIN Remote Controller and SUB Remote Controller 74 4 11 Low voltage Detection or Over voltage Detection 75 4 12 Signal Transmission Error Between Indoor Unit and Outdoor Unit 77 4 13 Mismatching of Indoor Unit and Outdoor Unit 79 4 14 Outdoor Unit PCB Abnormality ...

Page 5: ...2 5 10 Discharge Pressure Check 112 5 11 Outdoor Fan System Check 113 5 12 Main Circuit Short Check 113 5 13 Power Module Check 115 Part 7 Trial Operation and Field Settings 117 1 Pump Down Operation 118 2 Forced Cooling Operation 119 3 Trial Operation 120 4 Field Settings 123 4 1 How to Change the Field Settings 123 4 2 Overview of the Field Settings 126 4 3 MAIN SUB and Address Setting for Wirel...

Page 6: ...on is shown in the illustration or near the symbol 1 1 Warnings and Cautions Regarding Safety of Workers This manual is for the person in charge of maintenance and inspection Warning Do not store equipment in a room with fire sources e g naked flames gas appliances electric heaters Be sure to disconnect the power cable from the socket before disassembling equipment for repair Working on equipment ...

Page 7: ...e exclusive use with the R 32 R 410A refrigerant The use of materials for R 22 refrigerant models may cause a serious accident such as a damage of refrigerant cycle or equipment failure Do not mix air or gas other than the specified refrigerant R 32 R 410A R 22 in the refrigerant system If air enters the refrigerant system an excessively high pressure results causing equipment damage and injury Wa...

Page 8: ...priate tools to conduct repair work Never attempt to modify the equipment The use of inappropriate parts or tools may cause an electrical shock excessive heat generation or fire If the power cable and lead wires are scratched or have deteriorated be sure to replace them Damaged cable and wires may cause an electrical shock excessive heat generation or fire Do not use a joined power cable or extens...

Page 9: ...the refrigerant gas leaks be sure to locate the leaking point and repair it before charging the refrigerant After charging the refrigerant make sure that there is no leak If the leaking point cannot be located and the repair work must be stopped be sure to pump down and close the service valve to prevent refrigerant gas from leaking into the room Refrigerant gas itself is harmless but it may gener...

Page 10: ...t generation fire or an electrical shock If the installation platform or frame has corroded replace it A corroded installation platform or frame may cause the unit to fall resulting in injury Check the earth grounding and repair it if the equipment is not properly earthed grounded Improper earth grounding may cause an electrical shock Be sure to measure insulation resistance after the repair and m...

Page 11: ...tion is used when there is danger that the reader through incorrect manipulation may damage equipment lose data get an unexpected result or have to restart part of a procedure Note Note A Note provides information that is not indispensable but may nevertheless be valuable to the reader such as tips and tricks Reference A Reference guides the reader to other places in this binder or in this manual ...

Page 12: ...SiUS071735EB 1 List of Functions Part 1 List of Functions 1 Functions 2 ...

Page 13: ...t up down ON OFF timer 3 D airflow NIGHT SET mode COMFORT AIRFLOW operation Off Timer turns unit off after set time Switchable fan speed 3 steps Worry Free Reliability Durability Auto restart after power failure Auto fan speed Self diagnosis R C LED Comfort Control Indoor unit quiet operation Wiring error check function NIGHT QUIET mode automatic Anti corrosion treatment of outdoor heat exchanger ...

Page 14: ...SiUS071735EB 3 Specifications Part 2 Specifications 1 Specifications 4 ...

Page 15: ...n 343 290 240 9 7 8 2 6 8 343 290 240 9 7 8 2 6 8 343 290 240 9 7 8 2 6 8 343 290 240 9 7 8 2 6 8 External Static Pressure 5 inH2O 0 20 0 60 0 12 0 20 0 60 0 12 Pa 50 150 30 50 150 30 Sound Pressure Level dB A 32 32 32 32 Sound Power Level dB A 46 46 46 46 Air Filter 6 Weight Mass Lbs kg 64 29 64 29 Piping Connections Liquid in mm 1 4 6 4 Flare 1 4 6 4 Flare Gas in mm 3 8 9 5 Flare 3 8 9 5 Flare D...

Page 16: ...240 9 7 8 2 6 8 343 290 240 9 7 8 2 6 8 392 332 275 11 1 9 4 7 8 392 332 275 11 1 9 4 7 8 External Static Pressure 5 inH2O 0 20 0 60 0 12 0 20 0 60 0 12 Pa 50 150 30 50 150 30 Sound Pressure Level dB A 32 32 33 33 Sound Power Level dB A 46 46 47 47 Air Filter 6 Weight Mass Lbs kg 64 29 64 29 Piping Connections Liquid in mm 1 4 6 4 Flare 1 4 6 4 Flare Gas in mm 3 8 9 5 Flare 3 8 9 5 Flare Drain in ...

Page 17: ...75 11 1 9 4 7 8 392 332 275 11 1 9 4 7 8 392 332 275 11 1 9 4 7 8 392 332 275 11 1 9 4 7 8 External Static Pressure 5 inH2O 0 20 0 60 0 12 0 20 0 60 0 12 Pa 50 150 30 50 150 30 Sound Pressure Level dB A 33 33 33 33 Sound Power Level dB A 47 47 47 47 Air Filter 6 Weight Mass Lbs kg 64 29 64 29 Piping Connections Liquid in mm 1 4 6 4 Flare 1 4 6 4 Flare Gas in mm 3 8 9 5 Flare 3 8 9 5 Flare Drain in...

Page 18: ...6 12 4 10 2 516 438 360 14 6 12 4 10 2 675 572 473 19 1 16 2 13 4 675 572 473 19 1 16 2 13 4 External Static Pressure 5 inH2O 0 20 0 60 0 20 0 20 0 60 0 20 Pa 50 150 50 50 150 50 Sound Pressure Level dB A 34 34 35 35 Sound Power Level dB A 48 48 49 49 Air Filter 6 Weight Mass Lbs kg 77 35 82 37 Piping Connections Liquid in mm 1 4 6 4 Flare 1 4 6 4 Flare Gas in mm 1 2 12 7 Flare 1 2 12 7 Flare Drai...

Page 19: ... 16 2 13 4 675 572 473 19 1 16 2 13 4 798 678 558 22 6 19 2 15 8 798 678 558 22 6 19 2 15 8 External Static Pressure 5 inH2O 0 20 0 60 0 20 0 20 0 60 0 20 Pa 50 150 50 50 150 50 Sound Pressure Level dB A 35 35 40 40 Sound Power Level dB A 49 49 54 54 Air Filter 6 Weight Mass Lbs kg 82 37 82 37 Piping Connections Liquid in mm 1 4 6 4 Flare 1 4 6 4 Flare Gas in mm 1 2 12 7 Flare 5 8 15 9 Flare Drain...

Page 20: ...ram Part 3 Printed Circuit Board Connector Wiring Diagram 1 Indoor Unit 10 1 1 FDMQ09 12 15 18 24RVJU 10 2 Wired Remote Controller 12 2 1 BRC1E73 12 3 Wireless Remote Controller Receiver 13 3 1 BRC082A43 13 4 Outdoor Unit 14 4 1 RX09 12R 14 4 2 RX15 18 24R 15 ...

Page 21: ...tor R2T R3T 4 X25A Connector for drain pump motor 5 X27A Connector for terminal block for power supply 6 X28A Connector for power supply wiring option 7 X30A Connector for terminal block for wired remote controller 8 X33A Connector for wiring option 9 X35A Connector for adaptor option 10 X70A Connector for indoor fan PCB A2P 11 F1U Fuse 3 15 A 250 V 12 HAP LED for service monitor green 13 DS1 DIP ...

Page 22: ... A2P 1 X3A Connector for control PCB A1P 2 X6A Connector for reactor 3 X8A Connector for indoor fan motor 4 X10A Connector for terminal block for power supply 5 F2U Fuse 5 A 250 V 6 F4U Fuse 6 3 A 250 V 7 HAP LED for service monitor green 2P442228 16 2P442228 17 F2U X8A X3A X10A F4U X6A HAP ...

Page 23: ...Remote Controller Printed Circuit Board Connector Wiring Diagram 12 2 Wired Remote Controller 2 1 BRC1E73 Wired Remote Controller PCB 1 P1 P2 Terminal for indoor unit 2 R1T Room temperature thermistor P2 R1T P1 2P298037 7 ...

Page 24: ...ring Diagram 3 Wireless Remote Controller Receiver 3 1 BRC082A43 Wireless Remote Controller PCB 1 SS1 MAIN SUB setting switch Refer to page 127 for details 2 SS2 Address setting switch Refer to page 127 for details 3 P1 P2 Terminal for indoor unit control PCB A1P SS1 P2 P1 3P156152 1 SS2 ...

Page 25: ... for overload protector and high pressure switch for RX09 12RMVJU9A 4 S71 Connector for DC fan motor 5 S80 Connector for four way valve coil 6 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 7 HL1 HN1 S Connector for terminal block 8 E1 E2 Terminal for ground wire 9 HR1 HR2 Connector for reactor 10 FU1 FU2 Fuse 3 15 A 250 V 11 FU3 Fuse 20 A 250 V 12 J6 Jumpe...

Page 26: ...rotector 3 S70 Connector for DC fan motor 4 S80 Connector for four way valve coil 5 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 6 HL1 HN1 S Connector for terminal block 7 E1 E2 Terminal for ground 8 U V W Connector for compressor 9 FU1 FU2 Fuse 3 15 A 250 V 10 FU3 Fuse 30 A 250 V 11 J6 Jumper for facility setting Refer to page 129 for details 12 LED A LE...

Page 27: ...troller BRC1E73 23 1 7 Drain Pump Control 26 1 8 Hot Start Control In Heating Operation Only 28 1 9 Other Functions 29 2 Control Specification 30 2 1 Mode Hierarchy 30 2 2 Frequency Control 31 2 3 Controls at Mode Changing Start up 33 2 4 Discharge Pipe Temperature Control 35 2 5 Input Current Control 36 2 6 Freeze up Protection Control 37 2 7 Heating Peak cut Control 38 2 8 Outdoor Fan Control 39...

Page 28: ... by the following 2 parameters The load condition of the operating indoor unit The difference between the room thermistor temperature and the target temperature The target frequency is adapted by additional parameters in the following cases Frequency restrictions Initial settings Forced cooling operation Inverter Principle To regulate the capacity a frequency control is needed The inverter makes i...

Page 29: ...ing Once the set temperature is reached the energy saving operation enables to maintain the room temperature at low power Frequency Limits The following functions regulate the minimum and maximum frequency Forced Cooling Operation Refer to page 119 for details Refrigerant circulation rate high high f low f freq variable Refrigerant circulation rate low high speed low speed R2812 Amount of heat exc...

Page 30: ...nt protection purposes The system may turn off the fan when the room temperature is satisfied It is normal for a delay to occur when changing the fan speed If the Auto is selected for the fan speed the fan speed varies automatically based on the difference between set temperature and room temperature With Wireless Remote Controller BRC082A43 Press FAN SPEED CONTROL button High Medium or Low fan sp...

Page 31: ...rature is divided into two zones Then the unit operates in an appropriate capacity for each zone to maintain the temperature and humidity at a comfortable level Room thermistor temperature at start up Target temperature X Thermostat OFF point Y Thermostat ON point Z 24 5 C or more 76 1 F or more Room thermistor temperature at start up X 2 5 C X 4 5 F X 1 0 C X 1 8 F 16 5 24 C 61 7 75 2 F X 2 0 C X...

Page 32: ...own the button causes the number to change continuously Press buttons to select Clock Calendar on the main menu screen Press Menu OK button to display the clock calendar screen Select Month with buttons Change the month with buttons Holding down the button causes the number to change continuously Select Day with buttons Change the day with buttons Holding down the button causes the number to chang...

Page 33: ...ge the minute with buttons Holding down the button causes the number to change continuously Press Menu OK button The confirmation screen will appear The date can be set between January 1 2015 and December 31 2099 Press button to select Yes on the confirmation screen Press Menu OK button to confirm the clock and return to the basic screen When setting the schedule the display returns to the setting...

Page 34: ...ction is disabled for this time period __ Indicates that the temperature setpoint and setback temperature setpoint for this time period is not specified The last active setpoint will be utilized Setting the schedule 1 Press buttons to select Schedule Press Menu OK button to display the schedule screen The date time screen will appear 2 Before setting the schedule the clock must be set If the clock...

Page 35: ... 3 Press buttons to select Yes on the confirmation screen Pressing Menu OK button enters the daily patterns in the schedule and takes you back to the main menu screen R24074 1 The schedule screen will appear Press buttons to select Settings on the schedule screen The settings screen will appear when Menu OK button is pressed 2 Press buttons to select the day to be set It cannot be selected in the ...

Page 36: ...ture setpoint and setback temperature setpoint for this time period is not specified The last active setpoint will be utilized Indicates that the setback function is disabled for this time period 5 A maximum of five actions per day can be set Press Menu OK button when settings for each day are completed The confirmation screen will appear To copy the settings for the previous day press Mode button...

Page 37: ...le screen Press buttons to select Enable Disable on the schedule screen Press Menu OK button to display the enable disable screen Press buttons to select Enable or Disable on the enable disable screen Press Menu OK button after selecting the item The confirmation screen is displayed Press buttons to select Yes on the confirmation screen Pressing Menu OK button confirms the enable disable setting f...

Page 38: ...en turns ON again after 5 seconds 4 After A3 is determined and the unit comes to an abnormal stop the thermostat will remain OFF even if the float switch turns ON again 1 7 3 If the Float Switch is OFF with the Thermostat OFF in Cooling Operation When the float switch stays OFF for 5 sec the drain pump turns ON If the float switch remains OFF even after the residual operation of the drain pump has...

Page 39: ... In Heating Operation Only Outline 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 Details R24370 OFF Float Switch ON ON Thermostat running OFF ON A3 AF Error Display OFF ON Drain Pump OFF 1st 5 sec 5 sec 5 sec 5 sec 4th 5th 5 sec 5 min 5 min 5 sec 5 min 5 mi...

Page 40: ...power supply is restored to the conditions prior to the power failure Note It takes 3 minutes to restart the operation because the 3 minute standby function is activated 1 9 3 Emergency Operation Switch With Wireless Remote Controller BRC082A43 When the remote controller does not work due to battery failure or the absence thereof use the emergency operation switch Start Press emergency operation s...

Page 41: ...r installation and servicing Details Heat Pump Model Note Unless specified otherwise dry operation command is regarded as cooling operation Air conditioner control mode Forced operation mode Forced cooling operation for pump down operation Power transistor test mode Normal operation mode Fan Cooling includes drying Heating Heating Defrosting Stop indoor unit OFF Preheating control Discharging from...

Page 42: ... cut freeze up protection defrost control 3 Determine lower limit frequency The maximum value is set as an lower limit frequency among the frequency lower limits of the following functions Four way valve operation compensation draft prevention pressure difference upkeep 4 Determine prohibited frequency There is a certain prohibited frequency such as a power supply frequency Command frequency Limit...

Page 43: ... Frequency control is carried out only when the frequency drops For limiting lower limit Frequency control is carried out only when the frequency rises 4 Upper and lower limit of frequency by PI control The frequency upper and lower limits are set according to the command of the indoor unit When the indoor or outdoor unit quiet operation command comes from the indoor unit the upper limit frequency...

Page 44: ...temperature 85 C 185 F OFF condition Discharge pipe temperature 2 C 35 6 F Radiation fin temperature 90 C 194 F Control B ON condition Discharge pipe temperature 10 C 50 0 F Radiation fin temperature 85 C 185 F OFF condition Discharge pipe temperature 12 C 53 6 F Radiation fin temperature 90 C 194 F 2 3 2 Four Way Valve Switching Outline The four way valve coil is energized not energized depending...

Page 45: ...g The lower limit of frequency keeps A Hz for B seconds for any of the conditions above When the outdoor temperature is above C in heating the frequency decreases depending on the outdoor temperature 2 3 4 3 Minute Standby Turning on the compressor is prohibited for 3 minutes after turning it off The function is not activated when defrosting 2 3 5 Compressor Protection Function When turning the co...

Page 46: ... further Details 09 12 class 15 18 24 class C F C F A 110 230 0 110 230 0 B 103 217 4 103 217 4 C 98 208 4 101 5 214 7 D 93 199 4 100 212 0 E 88 190 4 95 203 0 Zone Control Stop zone When the temperature reaches the stop zone the compressor stops Dropping zone The upper limit of frequency decreases Keep zone The upper limit of frequency is kept Up zone The upper limit of frequency increases Reset ...

Page 47: ...ed Dropping zone The upper limit of the compressor frequency is defined as operation frequency 2 Hz After this the output frequency is lowered by 2 Hz every second until it reaches the keep zone Keep zone The present maximum frequency goes on Reset zone Limit of the frequency is canceled Limitation of current dropping and stop value according to the outdoor temperature The current drops when outdo...

Page 48: ... up protection control starts when any of the following conditions is satisfied The indoor heat exchanger temperature remains at A or lower for 1 minute The accumulated time that the indoor heat exchanger temperature remains at B or lower reaches 40 minutes Accumulated timer clearing condition The indoor heat exchanger temperature remains at C or higher for 20 minutes Ending condition The indoor h...

Page 49: ...135 5 60 140 0 60 140 0 60 140 0 B 55 131 0 54 129 2 55 131 0 54 129 2 C 52 125 6 51 123 8 52 125 6 51 123 8 D 50 122 0 49 120 2 50 122 0 49 120 2 E 45 113 0 44 111 2 45 113 0 44 111 2 Zone Control Stop zone When the temperature reaches the stop zone the compressor stops Dropping zone The upper limit of frequency decreases Keep zone The upper limit of frequency is kept Up zone The upper limit of f...

Page 50: ...ow the rotation speed of the outdoor fan is reduced When the pressure difference is high the rotation speed of the outdoor fan is controlled as well as normal operation 5 Fan speed control during forced cooling operation The outdoor fan is controlled as well as normal operation during forced cooling operation 6 Fan ON OFF control when operation cooling heating dry starts stops The outdoor fan is t...

Page 51: ...t control of accumulated time have passed since the start of the operation or ending the previous defrosting Conditions for Canceling Defrost The judgment is made with the outdoor heat exchanger temperature B 09 12 class 15 18 class 24 class A minute 20 25 44 44 B C 2 20 6 12 6 12 F 35 6 68 0 42 8 53 6 42 8 53 6 C Hz 64 48 48 D Hz 64 70 70 E seconds 40 60 60 F seconds 60 60 60 G seconds 120 630 12...

Page 52: ... discharge pipe thermistor is disconnected Feedback Control Target discharge pipe temperature control Details The following are the examples of electronic expansion valve control which function in each operation mode Available Not available Control Status Starting operation control Control when the frequency changes Target discharge pipe temperature control Discharge pipe thermistor disconnection ...

Page 53: ...arge pipe temperature exceeds a certain value the electronic expansion valve opens and the refrigerant runs to the low pressure side This procedure lowers the discharge pipe temperature 2 11 7 Discharge Pipe Thermistor Disconnection Control Outline The disconnection of the discharge pipe thermistor is detected by comparing the discharge pipe temperature with the condensation temperature If the dis...

Page 54: ...ctronic expansion valve opening is adjusted so that the actual discharge pipe temperature becomes close to the target discharge pipe temperature Indirect SH superheating control using the discharge pipe temperature The electronic expansion valve opening and the target discharge pipe temperature are adjusted every A seconds The opening degree of the electronic expansion valve is adjusted by the fol...

Page 55: ... temperature thermistor 2 12 2 Detection of Overcurrent and Overload Outline An excessive output current is detected and the OL temperature is observed to protect the compressor Details If the OL compressor head temperature exceeds 130 C 266 F the system shuts down the compressor If the inverter current exceeds 12 0 18 0 A depending on the model the system shuts down the compressor The upper limit...

Page 56: ...SiUS071735EB 45 Remote Controller Part 5 Remote Controller 1 Wired Remote Controller BRC1E73 46 2 Wireless Remote Controller BRC082A43 52 ...

Page 57: ... Controller 46 1 Wired Remote Controller BRC1E73 3 Menu OK button 8 On Off button 10 Cancel button 9 Operation lamp 11 LCD with backlight 4 Up button 5 Down button 6 Right button 7 Left button 1 Operation mode selector button 2 Fan speed control button ...

Page 58: ...klight will be illuminated for approximately 30 seconds by pressing any button If two remote controllers are used to control a single indoor unit only the controller accessed first will have backlight functionality Press this button to select the fan speed of your preference Available fan speeds vary with the indoor unit model Used to enter the main menu Used to enter the selected item Used to rai...

Page 59: ...fault Detailed and Simple displays can be selected in the main menu 10 Changeover controlled by the master indoor unit 9 Under centralized control 4 Stand by for Defrost Hot start The airflow direction clock and selectable item appear on Detailed display screen in addition to the items appearing on Standard display Displayed only when the indoor unit is turned on with no fan speed control function...

Page 60: ...ample 2 Fan speed 3 Setpoint 1 Operation mode 11 Setback 14 Selectable Display Item 4 Stand by for Defrost Hot start Depending on the field settings while the indoor unit is stopped OFF may be displayed instead of the operation mode and or the setpoint may not be displayed Note for all display modes ...

Page 61: ... is limited Displayed when another indoor unit on the system has the authority to change the operation mode between cool and heat Displayed when an energy recovery ventilator is connected Ventilation Mode icon These icons indicate the current ventilation mode ERV only AUTO ERV BYPASS Air Purify ICON This icon indicates that the air purifying unit Optional is in operation Used to display the fan sp...

Page 62: ...r unit model does not include oscillating louvers this item will not be displayed Displayed if the clock is set If the clock is not set will be displayed 12 hour time format is displayed by default Select 12 24 hour time display option in the main menu under Clock Calendar Room temperature is selected by default For other choices see the operation manual Displayed when the clock needs to be set Th...

Page 63: ...ss Remote Controller BRC082A43 R25006 7 9 12 10 11 13 14 15 8 1 3 4 5 2 6 DOWN FAN UP ON OFF M H L hr hr TEST MODE TIMER RESERVE CANCEL DOWN UP TEST FAN TIME TEMP ON OFF M H L hr hr TEST F F The situation which opened the front cover of the remote control R25007 18 19 21 16 20 17 ...

Page 64: ...MPERATURE SETTING BUTTON Use this button for SETTING TEMPERATURE Operates with the front cover of the remote controller closed PROGRAMMING TIMER BUTTON Use this button for programming START and or STOP time Operates with the front cover of the remote controller opened TIMER MODE START STOP BUTTON TIMER RESERVE CANCEL BUTTON OPERATION MODE SELECTOR BUTTON Press this button to select OPERATION MODE ...

Page 65: ...Controller and SUB Remote Controller 74 4 11 Low voltage Detection or Over voltage Detection 75 4 12 Signal Transmission Error Between Indoor Unit and Outdoor Unit 77 4 13 Mismatching of Indoor Unit and Outdoor Unit 79 4 14 Outdoor Unit PCB Abnormality 80 4 15 OL Activation Compressor Overload 81 4 16 OL Activation Compressor Overload or HPS Activation High Pressure Switch 83 4 17 Compressor Lock ...

Page 66: ... 5 4 Electronic Expansion Valve Check 107 5 5 Four Way Valve Performance Check 108 5 6 Inverter Unit Refrigerant System Check 108 5 7 Inverter Analyzer Check 109 5 8 Outdoor Fan Motor Check 111 5 9 Installation Condition Check 112 5 10 Discharge Pressure Check 112 5 11 Outdoor Fan System Check 113 5 12 Main Circuit Short Check 113 5 13 Power Module Check 115 ...

Page 67: ... to 10 cycles stops air conditioner operation Operation lamp OFF Check the outdoor temperature Heating cooling operations are not available when the outdoor temperature is out of the operation limit Check the reference page for the operation limit 139 Diagnose with remote controller indication 64 The unit operates but does not cool or does not heat Check for wiring and piping errors in the connect...

Page 68: ...s In either case conduct the diagnostic procedure described in the following pages With wired remote controller BRC1E73 With wireless remote controller BRC082A43 In case of wireless remote controller a receiver is installed When the error occurs the operation lamp on the receiver blinks 2 2 Outdoor Unit The outdoor unit has one green LED LED A on the PCB When the microcomputer works in order the L...

Page 69: ...enheit 1 3 Main Menu Airflow Direction Individual Airflow Direction Ventilation Schedule Off Timer Celsius Fahrenheit Filter Auto Clean Maintenance Information Configuration Current Settings Clock Calendar Daylight Saving Time Language Press Cancel button once Press Menu OK button once Basic Screen Operation mode changeover Fan speed control Menu display Confirmation of each setting On Off Cancel ...

Page 70: ...on Operation lamp 2 Error Code A1 Contact Info 0123 456 7890 Indoor Model 000 Outdoor Model 000 If an error occurs either one of the following items will flash in the basic screen The Operation lamp will flash For Simple display the message is not displayed and only the Operation lamp flashes The Operation lamp will not flash For Simple display the message is not displayed and the Operation lamp d...

Page 71: ...ade Filter cleaning sign time Others Following codes can be checked Error codes Indoor model code Service data can be obtained Error code history Temperature data of various sections Service settings can be made Forced fan ON Airflow rate setting Press INSPECTION TEST OPERATION button once Press ON OFF button within 10 seconds to start test operation Test operation will stop automatically after 15...

Page 72: ...The left 0 upper digit indication of the error code blinks Step Action UP button DOWN button R15408 If you hear Then 3 short beeps Follow all steps below 1 short beep Follow steps 3 and 4 Continue the operation in step 4 until you hear a long beep This long beep indicates that the error code is confirmed 1 long beep There is no abnormality R24051 OPERATION MODE SELECTOR button ...

Page 73: ... Press OPERATION MODE SELECTOR button The right 0 lower digit indication of the error code blinks Step Action UP button DOWN button R15411 UP DOWN 4 5 6 7 8 9 U P L J F H E C A 0 If you hear Then 2 short beeps The upper digit matches 1 short beep No digits match 1 long beep Both upper and lower digits match R24052 OPERATION MODE SELECTOR button ...

Page 74: ...TION MODE SELECTOR button to return to the normal mode If you do not press any button for 1 minute the remote controller automatically returns to the normal mode Step Action UP button DOWN button R15413 UP DOWN F E J C H A 9 8 7 6 5 4 3 2 1 0 If you hear Then 2 short beeps No digits match 1 long beep Both upper and lower digits match R24053 OPERATION MODE SELECTOR button ...

Page 75: ...between indoor unit and remote controller 73 U8 Signal transmission error between MAIN remote controller and SUB remote controller 74 Outdoor Unit E1 Outdoor unit PCB abnormality 80 E5 OL activation compressor overload 81 OL activation compressor overload or HPS activation high pressure switch 83 E6 Compressor lock 86 E7 DC fan lock outdoor fan motor 87 E8 Input overcurrent detection 88 EA Four wa...

Page 76: ...omputer or externally and usually requires more voltage for erasure than the common 5 volts used in logic circuits It functions like non volatile RAM but writing to EEPROM is slower than writing to RAM Supposed Causes Defective indoor unit PCB External factor noise etc Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged...

Page 77: ...wer switch before connecting or disconnecting connectors or parts may be damaged Connect the drain pump Replace the indoor unit PCB control PCB Replace the drain pump There is a drain system abnormality Connect the float switch Replace the float switch Replace the indoor unit PCB control PCB R25079 NO YES NO NO YES YES Is the drain pump connected to X25A on the indoor unit PCB NO Is the drain wate...

Page 78: ...B Defective fan motor No fuse continuity Troubleshooting Check No 02 Refer to P 106 Connect the connector correctly Turn OFF the power supply and wait for 10 minutes NO Turn ON the power supply while the fan motor connector 1 is disconnected YES NO Connect the connector correctly NO YES YES Replace the fuse There is a continuity in the fuse 2 on the fan PCB or fan motor harness NO The fan motor co...

Page 79: ...istance between the pins is equal to or lower than 1 Ω Replace the fan motor Replace the fan PCB A2P The HAP lamp on the indoor unit control PCB is blinking while the HAP lamp on the fan PCB is not blinking YES YES Check the fan motor connectors Check No 02 Replace the fan PCB A2P When A6 abnormality still reoccurs replace the fan motor A R25084 Model 1 Fan motor connector 2 Fuse FDMQ Series X8A F...

Page 80: ...sconnecting connectors or parts may be damaged Check for the indoor unit control PCB A1P and the fan PCB A2P Connect the connector correctly NO YES YES Is the connector X3A on the fan PCB connected correctly Connect the connector correctly NO YES Is the connector X70A on the indoor unit control PCB connected correctly Replace the harness YES Is the harness connecting X3A and X70A broken NO NO Remo...

Page 81: ...lectric expansion value in humidifier s Defective indoor unit PCB Troubleshooting Note The system continues to operate with the thermostat OFF even while the error code is displayed YES YES NO NO Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged The float switch may be defective Check if the drain up height and the horizontal pipe le...

Page 82: ... follows C4 Indoor heat exchanger thermistor 1 liquid pipe R2T C5 Indoor heat exchanger thermistor 2 R3T C9 Room temperature thermistor R1T Note When replacing the defective thermistor s replace the thermistors as ASSY Check No 01 Refer to P 105 Step Action 1 Disconnect the thermistor from the indoor unit PCB 2 Read the temperature and the resistance value 3 Check if the measured values correspond...

Page 83: ...running Supposed Causes Defective room temperature thermistor in the wired remote controller Defective wired remote controller PCB External factor such as noise Troubleshooting Note To delete the record of error codes press ON OFF button for 4 seconds or more while the error code is displayed in the inspection mode Replace the remote controller External factor other than equipment malfunction for ...

Page 84: ...ion Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Are both remote controllers set to MAIN Do the service monitors of all the indoor units blink Does operation return to normal when the power is turned off momentarily NO NO YES YES NO Replace the indoor unit PCB control PCB Set 1 remote controller to SUB turn the power supply off once and...

Page 85: ...rs when using 2 remote controllers Defective remote controller PCB Troubleshooting Note For the way to change MAIN SUB setting of remote controllers refer to page 127 Turn the power off and then back on If a malfunction occurs replace the remote controller Turn the power off and then back on If a malfunction occurs replace the remote controller Set one remote controller to MAIN turn the power supp...

Page 86: ...n the model The compressor stops if the error occurs and restarts automatically after 3 minute standby Over voltage detection An over voltage signal is fed from the over voltage detection circuit to the microcomputer over 458 500 V depending on the model The compressor stops if the error occurs and restarts automatically after 3 minute standby Supposed Causes Power supply voltage out of specificat...

Page 87: ...ES YES YES Reconnect the harness Check the power supply voltage Check the connection of the compressor harness Disturbance factors Noise Power supply distortion Precaution before turning on the power again Make sure the power has been off for at least 30 seconds Turn on the power System restarted Repeat a few times Loose or disconnected NO NO Replace the outdoor fan motor and the outdoor unit PCB ...

Page 88: ... Error Decision Conditions The data sent from the outdoor unit cannot be received normally or the content of the data is abnormal Supposed Causes Power supply voltage out of specification Reduction of power supply voltage Wiring error Breaking of the connecting wires between the indoor and outdoor units wire No 3 Defective outdoor unit PCB Short circuit inside the fan motor winding Defective indoo...

Page 89: ...nd the outdoor unit Replace the outdoor unit PCB main PCB Replace the connection wires between the indoor unit and outdoor unit Is LED A blinking Properly insulated Is there any disturbance Is there any wiring error Check the connection wires between the indoor unit and the outdoor unit Check the LED A on the outdoor unit PCB Be sure to turn off the power switch before connecting or disconnecting ...

Page 90: ...heck again YES YES NO NO Connect the indoor outdoor units correctly YES YES YES YES NO NO NO Blink R24372 Is the combination of indoor outdoor units correct Do the service monitors of all the indoor units blink Are the wirings between indoor unit and outdoor unit correctly connected Connect the wirings correctly NO Is the optional units power supply connected from the indoor unit terminal block No...

Page 91: ...e zero cross signal is not detected Supposed Causes Defective outdoor unit PCB Noise Momentary drop of voltage Momentary power failure Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Continuously ON or OFF Blink YES R26248 NO Replace the outdoor unit PCB main PCB Ground the system Zero cross signal abnormality Repla...

Page 92: ... If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Disconnection of discharge pipe thermistor Defective discharge pipe thermistor Disconnection of connector S40 Disconnection of 2 terminals of OL Q1L Defective OL Q1L Broken OL harness Defective electronic expansion valve or coil Defective four way valve or coil ...

Page 93: ...ace the discharge pipe thermistor Replace the electronic expansion valve or the coil Refer to the refrigerant line check procedure Replace the outdoor unit PCB main PCB Replace the four way valve or the coil Replace the outdoor unit PCB main PCB Discharge pipe thermistor disconnected Check No 01 Check the discharge pipe thermistor Check No 13 Check the four way valve Check No 14 Check the refriger...

Page 94: ...n Continuous run for about 60 minutes without any other error Supposed Causes Disconnection of discharge pipe thermistor Disconnection of indoor or outdoor heat exchanger thermistor Defective discharge pipe thermistor Defective indoor or outdoor heat exchanger thermistor Disconnection of connector S40 Disconnection of 2 terminals of OL Q1L Disconnection of 2 terminals of HPS S1PH Defective OL Q1L ...

Page 95: ...r Replace the electronic expansion valve or the coil Refer to the refrigerant line check procedure Replace the outdoor unit PCB main PCB Replace the four way valve or the coil Replace the outdoor unit PCB main PCB Thermistor disconnected NG OK Replace the defective thermistor s Check No 01 Check the thermistor resistance value Check No 13 Check the four way valve Check No 14 Check the refrigerant ...

Page 96: ...ting temperature 130 C 266 F OL Q1L recovery temperature 95 C 203 F High pressure switch S1PH activating pressure 602 psi 4 15 MPa High pressure switch S1PH recovery pressure 464 psi 3 2 MPa Note When replacing the defective thermistor s replace the thermistors as ASSY ...

Page 97: ... the harnesses U V and W R21067 Caution NO YES YES NO NO YES NO YES Check No 15 Check with the inverter analyzer Turn off the power and reconnect the harnesses Turn on the power again and restart the system Precaution before turning on the power again Make sure the power has been off for at least 30 seconds Correct the power supply or replace the outdoor unit PCB main PCB Open the stop valve Inver...

Page 98: ...isconnection of the fan motor Foreign matter stuck in the fan Defective fan motor Defective outdoor unit PCB Troubleshooting Check No 16 Refer to P 111 R26247 Caution YES YES NO YES NO NO YES NO Turn on the power Rotate the fan Check No 16 Check the outdoor fan motor Turn off the power and reconnect the connector Remove the foreign matters Replace the outdoor fan motor Replace the outdoor unit PCB...

Page 99: ... Refer to P 112 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged An input overcurrent may result from wrong internal wiring If the system is interrupted by an input overcurrent after the wires have been disconnected and reconnected for part replacement check the wiring again R21863 NO YES YES NO Start operation and measure the input...

Page 100: ...condition continues over 10 minutes after operating for 5 minutes Cooling Dry A B 5 C A B 9 F Heating B A 5 C B A 9 F A Room thermistor temperature B Indoor heat exchanger temperature If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Disconnection of four way valve coil Defective four way valve coil or harness D...

Page 101: ...Replace the four way valve defective or dust clogged Reconnect the thermistor s Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged R20405 Refrigerant shortage Water mixed Stop valve Four way valve coil disconnected loose Harness disconnected Any thermistor disconnected Check No 01 Check the thermistors Check No 14 Check the refrigeran...

Page 102: ... valve or coil Refrigerant shortage Defective four way valve Water mixed in refrigerant Defective stop valve Defective outdoor unit PCB Troubleshooting Check No 01 Refer to P 105 Check No 12 Refer to P 107 Check No 14 Refer to P 108 Note When replacing the defective thermistor s replace the thermistors as ASSY A B C F C F 09 12 class 110 230 88 190 4 15 18 24 class 110 230 95 203 R20417 Caution NG...

Page 103: ...the outdoor heat exchanger thermistor exceeds the limit Error Decision Conditions The temperature sensed by the outdoor heat exchanger thermistor rise above 57 5 61 C 135 5 141 8 F depending on the model Supposed Causes Installation space not large enough Dirty outdoor heat exchanger Defective outdoor fan motor Defective stop valve Defective electronic expansion valve or coil Defective outdoor hea...

Page 104: ...at exchanger thermistor Replace the outdoor unit PCB main PCB Replace the electronic expansion valve or the coil Replace the outdoor unit PCB main PCB Change the installation location or direction Clean the outdoor heat exchanger Check the installation space NG OK OK NG NG OK OK OK NG NG Check No 19 Check the outdoor fan Check No 18 Check the discharge pressure Check No 12 Check the electronic exp...

Page 105: ...on Defective discharge pipe thermistor Troubleshooting Check No 01 Refer to P 105 Note When replacing the defective thermistor s replace the thermistors as ASSY YES R23655 NO OK NG Caution Replace the outdoor unit Replace both the discharge pipe thermistor and the outdoor unit PCB main PCB Replace the outdoor unit Abnormal deformation of piping in the outdoor unit Check No 01 Check the discharge p...

Page 106: ...ge before compressor start up is below 50 V Supposed Causes Broken or disconnected harness Defective outdoor unit PCB Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged NO R24613 YES Turn off the power Then turn on the power to restart the system YES NO Replace the harness Replace the outdoor unit PCB main PCB Is the h...

Page 107: ...gh the position detection circuit Error Decision Conditions If the error repeats the system is shut down Reset condition Continuous run for about 11 minutes without any other error Supposed Causes Power supply voltage out of specification Disconnection of the compressor harness Defective compressor Defective outdoor unit PCB Start up failure caused by the closed stop valve Input voltage outside th...

Page 108: ...5 Check with the inverter analyzer Turn off the power Disconnect the harnesses U V and W Turn on the power Check the electrolytic capacitor voltage Electrical components or compressor harnesses connected as specified Replace the outdoor unit PCB main PCB Correct the power supply or replace the outdoor unit PCB main PCB Replace the compressor Reconnect the electrical components or compressor harnes...

Page 109: ...mpressor running frequency and the input current Error Decision Conditions If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Defective outdoor unit PCB Troubleshooting Replace the outdoor unit PCB main PCB Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be ...

Page 110: ... 04 V or less with the power on J3 error is judged if the discharge pipe temperature is lower than the heat exchanger temperature Supposed Causes Disconnection of the connector for the thermistor Defective thermistor s Defective heat exchanger thermistor in the case of J3 error outdoor heat exchanger thermistor in cooling operation or indoor heat exchanger thermistor in heating operation Defective...

Page 111: ...emperature Replace the defective thermistor s of the following thermistors Outdoor temperature thermistor Discharge pipe thermistor Outdoor heat exchanger thermistor Cooling Outdoor heat exchanger temperature Heating Indoor heat exchanger temperature Replace the indoor heat exchanger thermistor Replace the outdoor unit PCB main PCB Error displayed again on remote controller Indoor heat exchanger t...

Page 112: ...Troubleshooting Check No 17 Refer to P 112 Check No 19 Refer to P 113 A B C C F C F C F 09 12 class 82 179 6 65 149 70 158 15 18 24 class 90 194 64 147 2 81 177 8 Caution WARNING To cool the electrical components the outdoor fan starts when the radiation fin temperature rises above C and stops when the radiation fin temperature drops below B R22998 YES NO YES NG NO OK NO YES Turn off the power The...

Page 113: ... the outdoor unit PCB Troubleshooting Check No 17 Refer to P 112 Check No 19 Refer to P 113 Note Refer to Silicone Grease on Power Transistor Diode Bridge on page 130 for details A B C F C F 09 12 class 99 210 2 70 158 15 18 24 class 100 212 57 134 6 Caution Turn off the power Then turn on the power to restart the system Be sure to turn off the power switch before connecting or disconnecting conne...

Page 114: ...A rotation speed error occurs while the compressor is running An output overcurrent signal is fed from the output overcurrent detection circuit to the microcomputer If the error repeats the system is shut down Reset condition Continuous run for about 11 minutes without any other error Supposed Causes Poor installation condition Closed stop valve Defective power module Wrong internal wiring Abnorma...

Page 115: ...f the same error occurs Check the power supply voltage Monitor the power supply voltage discharge and suction pressures and other factors for a long term Possible causes Momentary drop of power supply voltage Compressor overload Short circuit Check the installation condition Check with the inverter analyzer Check the power module Not a malfunction Keep observing Check the connectors and other comp...

Page 116: ...move the PCB from the control PCB to measure the resistance When the connector of indoor heat exchanger thermistor is soldered on a PCB remove the thermistor and measure the resistance Thermistor temperature Resistance k C F 20 4 197 8 15 5 148 2 10 14 112 1 5 23 85 60 0 32 65 93 5 41 51 14 10 50 39 99 15 59 31 52 20 68 25 02 25 77 20 00 30 86 16 10 35 95 13 04 40 104 10 62 45 113 8 707 50 122 7 1...

Page 117: ... 5 3 Power Supply Waveforms Check Check No 11 Measure the power supply waveform between No 1 and No 2 on the terminal block and check the waveform disturbance Check if the power supply waveform is a sine wave Fig 1 Check if there is waveform disturbance near the zero cross sections circled in Fig 2 Measuring points Judgement White Blue 1 M or more Orange Blue 100 k or more Brown Blue 100 or more R...

Page 118: ... not generate a latching sound in step 2 disconnect the connector and check the continuity using a multimeter 4 Check the continuity between the pins 5 1 5 2 5 3 5 4 between the pins 6 1 6 2 6 3 and 6 4 for the 6P connector models If there is no continuity between the pins the EV coil is faulty 5 If the continuity is confirmed in step 3 the outdoor unit PCB main PCB is faulty Harness 5P 6P Connect...

Page 119: ...ng Dry Defrost Not energized Heating energized Replace the outdoor unit PCB main PCB Replace the four way valve coil Replace the four way valve Four way valve coil resistance at 1000 2000 Ω S80 voltage at 208 230 VAC with compressor on Fig 1 R14674 Fig 1 Compressor ON Voltage at S80 208 230 VAC Time Refrigerant system check Check for refrigerant leakage See the service diagnosis on refrigerant sho...

Page 120: ...ure to turn off the power Step 2 Install an inverter analyzer instead of a compressor Note Make sure the charged voltage of the built in smoothing electrolytic capacitor drops to 10 VDC or below before carrying out the service work Reference If the terminals of the compressor are not FASTON terminals difficult to remove the wire on the terminals it is possible to connect wires available on site to...

Page 121: ...RC1E73 1 Turn the power on 2 Set FAN operation using the remote controller 3 Press and hold Cancel button for 4 seconds or longer Test operation will stop automatically after about 30 minutes To stop the operation press On Off button 4 Select Test Operation in the service settings menu then press Menu OK button Basic screen returns and Test Operation is displayed at the bottom 5 Press On Off butto...

Page 122: ...ge between the pins 4 3 is 15 VDC 4 Check that the rotation command voltage between the pins 4 2 is 0 6 5 VDC 5 Keep operation off and power off Connect the connector S70 or S71 6 Check whether 4 rotation pulses 0 15 VDC are input at the pins 4 1 when the fan motor is rotated 1 turn by hand When the fuse is melted check the outdoor fan motor for proper function If NG in step 2 Defective PCB Replac...

Page 123: ...y dirty Change the installation location or direction Change the installation location or direction Clean the outdoor heat exchanger Change the installation location or direction Check the outdoor temperature The outdoor temperature should be within the operation range R19385 YES YES YES NO NO NO NO YES Is the air filter or indoor outdoor heat exchanger dirty Is the connection pipe deformed Is the...

Page 124: ...rring to the table below If the resistance is or less than 1 k short circuit occurs on the main circuit 09 12 class R21195 YES NO NO YES Outdoor fan system is functioning Check the outdoor fan system Reconnect the connector Is the outdoor fan running Fan motor lead wire connector disconnected Go to Check No 16 Positive terminal of digital multimeter 2 3 4 2 3 1 Negative terminal of digital multime...

Page 125: ...SiUS071735EB Check Service Diagnosis 114 15 18 24 class R25105 1 2 3 4 Multimeter ...

Page 126: ...ion on the connector Follow the procedure below to measure resistance between the terminals of the power module and the terminals of the compressor with a multimeter Evaluate the measurement results referring to the following table 09 12 class Positive terminal of digital multimeter Power module UVW Power module UVW Negative terminal of digital multimeter UVW Power module UVW Power module Resistan...

Page 127: ...SiUS071735EB Check Service Diagnosis 116 15 18 24 class R20704 W V U DC_P1 DC_N1 ...

Page 128: ...d Cooling Operation 119 3 Trial Operation 120 4 Field Settings 123 4 1 How to Change the Field Settings 123 4 2 Overview of the Field Settings 126 4 3 MAIN SUB and Address Setting for Wireless Remote Controller 127 4 4 Facility Setting cooling at low outdoor temperature 129 5 Silicone Grease on Power Transistor Diode Bridge 130 ...

Page 129: ... the liquid stop valve and the gas stop valve 2 Carry out forced cooling operation 3 After 5 to 10 minutes close the liquid stop valve with a hexagonal wrench 4 After 2 to 3 minutes close the gas stop valve and stop forced cooling operation 5 Attach the valve cap once procedures are complete Refer to Forced Cooling Operation on page 119 for details Gas stop valve Valve cap Close Liquid stop valve ...

Page 130: ...s menu is displayed 3 Select in the service settings menu and press Menu OK button Basic screen returns and Test Operation is displayed at the bottom 4 Press On Off button within 10 seconds and the forced cooling operation starts Forced cooling operation will stop automatically after about 15 minutes To stop the operation press On Off button 1 Press button and select the COOL operation 2 Press but...

Page 131: ...ual to ensure that all functions and parts are working properly To protect the air conditioner restart operation is disabled for 3 minutes after the system has been turned off 4 After trial operation is complete set the temperature to a normal level 78 F to 82 F 26 C to 28 C in COOL operation 68 F to 75 F 20 C to 24 C in HEAT operation Caution After finishing the construction of refrigerant piping...

Page 132: ...emperature setpoint and room temperature In the case of above mentioned procedures 3 and 4 in reverse order test operation can start as well 5 Press and hold Cancel button for 4 seconds or longer in the basic screen Service settings menu is displayed 6 Select in the service settings menu and press Menu OK button Basic screen returns and normal operation is conducted Test operation will stop automa...

Page 133: ... or burn damage No refrigerant gas leaks Incomplete cooling heating function Refrigerant gas and liquid pipes and indoor drain hose extension are thermally insulated Water leakage Draining line is properly installed Water leakage Does the power supply voltage correspond to that shown on the name plate No operation or burn damage Only specified wires are used for all wiring and all wires are connec...

Page 134: ...mote controller Wired Remote Controller BRC1E73 a Unit No b First code No c Second code No d Mode 1 Press and hold Cancel button for 4 seconds or longer Service settings menu is displayed 2 Select in the Service Settings menu and press Menu OK button Field settings screen is displayed a b c d R18831 Basic screen 1 Set temperature 28 C Fan Return Press the menu button Press and hold Cancel button f...

Page 135: ...ed When SECOND CODE NO is displayed as there is no function 6 Press Menu OK button Setting confirmation screen is displayed 7 Select and press Menu OK button Setting details are determined and field settings screen returns 8 In the case of multiple setting changes repeat 3 to 7 9 After all setting changes are completed press Cancel button twice 10 Backlight goes out and Checking the connection Ple...

Page 136: ...st 4 seconds to enter the Field Set mode 2 Select the desired Mode No with MODE button 3 Press button and select the First code No 4 Press button and select the Second code No 5 Press RESERVE button to confirm the settings 6 Press TEST button to quit the Field Set mode and to return to normal display again RESERVE button Mode No Field setting mode UP button DOWN button First code No Second code No...

Page 137: ...lter cleaning sign interval used to change filter cleaning display interval according to filter contamination Longlife filter Light Approx 2 500 hrs Heavy Approx 1 250 hrs Standard filter Approx 200 hrs Approx 100 hrs 3 Filter cleaning sign used to set filter cleaning display ON OFF Display No display 11 21 7 Air volume adjustment OFF Air volume adjustment completion Air volume adjustment start 13...

Page 138: ...s remote controller with 1 indoor unit change the MAIN SUB switch of the signal receiver PCB Signal Receiver PCB Setting MAIN SUB switch Set the MAIN SUB setting switch SS1 on the signal receiver PCB to SUB Wireless address switch Set the address setting switch SS2 on the signal receiver PCB according to the table below MAIN SUB MAIN SUB setting switch SS1 Unit No No 1 No 2 No 3 Address setting sw...

Page 139: ... the setting 5 Hold down TEST button to quit the field setting mode and return to the normal display Multiple Settings or When the indoor unit is controlled by an outside controller central remote controller etc the indoor unit sometimes does not respond to ON OFF command or temperature setting command from the wireless remote controller Check what setting the customer needs and make the multiple ...

Page 140: ...rature rises above this level 1 Remove the top plate of the outdoor unit RX09 12RMVJU RX09 12RMVJU9 3 screws RX09 12RMVJU9A 4 screws 15 18 24 class 6 screws 2 Remove the front plate RX09 12RMVJU RX09 12RMVJU9 4 screws RX09 12RMVJU9A 5 screws 15 18 24 class 8 screws 3 Cut the jumper J6 of the PCB inside For the location of the jumper refer to pages 14 15 Caution Replace the PCB if you accidentally ...

Page 141: ... bridge Details 1 Wipe off the old silicone grease completely 2 Apply the silicone grease evenly See the illustrations below for examples of application 3 Tighten the screws of the power transistor diode bridge 4 Make sure that the heat radiation parts are firmly contacted to the radiation fin Note Smoke emission may be caused by bad heat radiation when the silicone grease is not appropriately app...

Page 142: ...SiUS071735EB 131 Appendix Part 8 Appendix 1 Piping Diagrams 132 1 1 Indoor Unit 132 1 2 Outdoor Unit 133 2 Wiring Diagrams 135 2 1 Indoor Unit 135 2 2 Outdoor Unit 136 3 Operation Limit 139 ...

Page 143: ...SiUS071735EB Piping Diagrams Appendix 132 1 Piping Diagrams 1 1 Indoor Unit FDMQ09 12 15 18 24RVJU C 4D112974A ...

Page 144: ... 3 8 CuT 3 16 CuT 3 8 CuT 5 16 CuT MUFFLER 3 8 CuT 3 8 CuT REFRIGERANT FLOW 5 16 CuT ACCUMULATOR MUFFLER COOLING HEATING COMPRESSOR OUTDOOR TEMPERATURE THERMISTOR HEAT EXCHANGER THERMISTOR MUFFLER WITH FILTER MOTOR OPERATED VALVE MUFFLER WITH FILTER LIQUID STOP VALVE FIELD PIPING 1 4 CuT FIELD PIPING 3 8 CuT GAS STOP VALVE WITH SERVICE PORT DISCHARGE PIPE THERMISTOR FOUR WAY VALVE ON HEATING 3D092...

Page 145: ...RIGERANT FLOW 5 32 CuT COOLING HEATING M PROPELLER FAN STRAINER 1 2 CuT 1 4 CuT 1 2 CuT 1 2 CuT MUFFLER 5 16 CuT 1 4 CuT MUFFLER 1 2 CuT ACCUMULATOR 5 16 CuT COMPRESSOR HEAT EXCHANGER THERMIST0R OUTDOOR AIR THERMISTOR MUFFLER WITH FILTER ELECTRONIC EXPANSION VALVE LIQUID RECEIVER FOUR WAY VALVE ON HEATING DISCHARGE PIPE THERMISTOR GAS STOP VALVE WITH SERVICE PORT LIQUID STOP VALVE FIELD PIPING 1 4...

Page 146: ...Diagrams SiUS071735EB 135 Appendix 2 Wiring Diagrams 2 1 Indoor Unit FDMQ09 12 15 18 24RVJU Note A1P Control PCB A2P Indoor fan PCB Refer to Part 3 for Printed Circuit Board Connector Wiring Diagram 3D112629A ...

Page 147: ...U RED NOTE YLW Y1S V t t t U M W MS Q1L Y1E M1F M1C Z1C N 2 FU3 20A Z2C N 2 FU2 3 15A FU1 3 15A Z3C N 2 MS 3 IN CASE OF HEAT PUMP TYPE R1T OUTDOOR R2T CONDENSER R3T DISCHARGE 1 REFER TO THE NAMEPLATE FOR THE POWER REQUIREMENTS C400 C405 DB1 FU1 FU2 FU3 IPM1 L1 L2 L1R M1C M1F MRM10 MRCW PCB1 CAPACITOR DIODE BRIDGE FUSE INTELLIGENT POWER MODULE LIVE REACTOR COMPRESSOR MOTOR FAN MOTOR MAGNETIC RELAY ...

Page 148: ...Wiring Diagrams SiUS071735EB 137 Appendix RX09 12RMVJU9A Note PCB1 Main PCB Refer to Part 3 for Printed Circuit Board Connector Wiring Diagram 3D134904 ...

Page 149: ...LW NOTE 1 REFER TO THE NAMEPLATE FOR THE POWER REQUIREMENTS V U W t t t MS M Y1S Q1L Y1E M1C M1F GROUND N 5 Z3C N 4 Z2C FU3 30A FU1 3 15A FU2 3 15A Z1C N 4 MS 3 R1T OUTDOOR R2T CONDENSER R3T DISCHARGE IN CASE OF HEAT PUMP TYPE C7 DB1 FU1 FU2 FU3 IPM1 L1 L2 M1C M1F MRM10 MRM20 MRCW PAM PCB CAPACITOR DIODE BRIDGE FUSE INTELLIGENT POWER MODULE LIVE COMPRESSOR MOTOR FAN MOTOR MAGNETIC RELAY PULSE AMPL...

Page 150: ...ng is equipment such as computers Never use it in a residence or office the space where there is a human Indoor fan tap should be fixed to high Cutting jumper 6 J6 on the circuit board extend the operation range to 14 F 10 C Installing an air direction adjustment grille wind baffle sold separately extend the operation range to 4 F 20 C Heating Cooling 70 122 64 4 114 8 60 104 50 86 41 68 Pull down...

Page 151: ...on History Month Year Version Revised contents 01 2018 SiUS071735E First edition 06 2020 SiUS071735EA Model addition RX09 12RMVJU9 RX15 24RMVJUA RX18RMVJU9 A 09 2021 SiUS071735EB Model addition RX09 12RMVJU9A ...

Page 152: ...e of unauthorized parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage electrical shock fire or explosion Read the user s manual carefully before using this product The user s manual provides important safety instructions and warnings Be sure to follow these instructions and warnings If you have any inquiries please contact your local i...

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