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Indoor Unit: 15/18/24 Class

SiUS041111

150

Removal Procedure

2. Indoor Unit: 15/18/24 Class

2.1

Removal of Air Filters / Front Panel

Procedure

Warning

Be sure to wait for 10 minutes or more after turning off all power supplies
before disassembling work.

Step

Procedure

Points

Warning

Dangerous: High voltage
A high voltage is applied to all
the electric circuits of this
product including thermistors.



When the signal receiver
catches a signal from the
remote controller, the receiving
tone sounds and the operation
lamp blinks immediately to
confirm the signal reception.



When the ON/OFF button is
kept pressed for 5 seconds, the
forced cooling operation is
performed for about 15 minutes.

1. Remove the air filters.

1

Open the front panel to
the position where it
stops.

2

3

Slightly push up the
center knob of the air
filter and unfasten the
hooks.

Pull out the air filter
downward and remove
it.



The air filter is not marked for
difference between the right and
left sides.



The air filter can be set easily by
inserting it along the guides.



Insert the air filter with the
"FRONT" mark faced up.



Be sure to insert the hooks (at 2
lower positions) when mounting
the air filter.

(R12786)

Operation lamp

Signal receiver

TIMER lamp

ON/OFF button

(R12787)

Room temperature thermistor

(R6701)

Front panel

Air filter

(R6702)

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Summary of Contents for RKN09KEVJU

Page 1: ...Service Manual Inverter Pair Wall Mounted Type K Series SiUS041111 Applied Models Inverter Pair Cooling Only Inverter Pair Heat Pump ...

Page 2: ...y Indoor Unit FTXN09KEVJU FTXN12KEVJU FTXN15KVJU FTXN18KVJU FTXN24KVJU Outdoor Unit RKN09KEVJU RKN12KEVJU RKN15KEVJU RKN18KEVJU RKN24KEVJU Heat Pump Indoor Unit FTXN09KEVJU FTXN12KEVJU FTXN15KVJU FTXN18KVJU FTXN24KVJU Outdoor Unit RXN09KEVJU RXN12KEVJU RXN15KEVJU RXN18KEVJU RXN24KEVJU ...

Page 3: ... 2 15 18 24 Class 18 Part 4 Function and Control 20 1 Main Functions 21 1 1 Temperature Control 21 1 2 Frequency Principle 21 1 3 Airflow Direction Control 23 1 4 Fan Speed Control for Indoor Unit 24 1 5 Program Dry Operation 25 1 6 Automatic Operation 26 1 7 Thermostat Control 27 1 8 NIGHT SET Mode 28 1 9 ECONO Operation 29 1 10 Inverter POWERFUL Operation 30 1 11 Other Functions 31 2 Function of...

Page 4: ...TIMER Operation 60 2 8 ON TIMER Operation 61 3 15 18 24 Class 62 3 1 Remote Controller 62 3 2 AUTO DRY COOL HEAT FAN Operation 64 3 3 Adjusting the Airflow Direction and Rate 66 3 4 POWERFUL Operation 68 3 5 OFF TIMER Operation 69 3 6 ON TIMER Operation 70 Part 6 Service Diagnosis 71 1 Troubleshooting with LED 73 1 1 Indoor Unit 73 1 2 Outdoor Unit 73 2 Problem Symptoms and Measures 74 3 Service C...

Page 5: ... 2 Fan Motor Connector Output Check 117 5 3 Power Supply Waveforms Check 118 5 4 Electronic Expansion Valve Check 118 5 5 Four Way Valve Performance Check 119 5 6 Inverter Unit Refrigerant System Check 119 5 7 Inverter Checker Check 120 5 8 Rotation Pulse Check on the Outdoor Unit PCB 122 5 9 Installation Condition Check 123 5 10 Discharge Pressure Check 124 5 11 Outdoor Fan System Check 124 5 12 ...

Page 6: ...val of Electrical Box 198 4 4 Removal of PCBs 206 4 5 Removal of Sound Blankets 213 4 6 Removal of Electronic Expansion Valve AssemblyASSY 216 4 7 Removal of Four Way Valve 217 4 8 Removal of Compressor 218 Part 8 Trial Operation and Field Settings 220 1 Pump Down Operation 221 2 Forced Cooling Operation 222 3 Trial Operation 223 4 Field Settings 224 4 1 Model Type Setting 224 4 2 Temperature Disp...

Page 7: ...e Use only pipes flare nuts tools and other materials designed specifically for R410A refrigerant systems Never use tools or materials designed for R22 refrigerant systems on an R410A refrigerant system Doing so can cause a serious accident or an equipment failure Check to see if the parts and wires are mounted and connected properly and if the connections at the soldered or crimped terminals are ...

Page 8: ...hem replaced Damaged cable and wires may cause an electrical shock or fire Do not use a joined power cable or an extension cord or share the same power outlet with other electrical appliances as it may cause an electrical shock or fire Use an exclusive power circuit for the equipment Insufficient circuit amperage capacity may cause an electrical shock or fire Do not damage or modify the power cabl...

Page 9: ...SiUS041111 List of Functions 1 Part 1 List of Functions 1 Functions 2 ...

Page 10: ...g Right and Left Self Diagnosis Digital LED Display 3 D Airflow Wiring Error Check Function COMFORT AIRFLOW Operation Anti Corrosion Treatment of Outdoor Heat Exchanger Comfort Control Auto Fan Speed Flexibility Multi Split Split Type Compatible Indoor Unit Indoor Unit Quiet Operation NIGHT QUIET Mode Automatic H P C O Compatible Indoor Unit Outdoor Unit Quiet Operation Manual Flexible Power Suppl...

Page 11: ...t after Power Failure 3 D Airflow Self Diagnosis Digital LED Display COMFORT AIRFLOW Operation Wiring Error Check Function Comfort Control Auto Fan Speed Anticorrosion Treatment of Outdoor Heat Exchanger Indoor Unit Quiet Operation Flexibility Multi Split Split Type Compatible Indoor Unit NIGHT QUIET Mode Automatic H P C O Compatible Indoor Unit Outdoor Unit Quiet Operation Manual Flexible Power S...

Page 12: ...SiUS041111 4 Specifications Part 2 Specifications 1 Specifications 5 1 1 Cooling Only 5 1 2 Heat Pump 8 ...

Page 13: ...e Washable Mildew Proof Running Current Rated A 0 20 0 18 0 20 0 18 Power Consumption Rated W 40 40 Power Factor 96 2 96 6 96 2 96 6 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D inch mm 11 9 64 30 5 16 7 51 64 283 770 198 11 9 64 30 5 16 7 51 64 283 770 198 Packaged Dimensions H W D inch mm 10 17 64 33 7 32 13 15 32 261 844 342 10 17 64 33 7 32 13 15 32 261 844 ...

Page 14: ...shable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 17 0 15 0 17 0 15 Power Consumption Rated W 34 34 34 34 Power Factor 96 2 98 6 96 2 98 6 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D inch mm 11 7 16 41 5 16 9 3 8 290 1 050 238 11 7 16 41 5 16 9 3 8 290 1 050 238 Packaged Dimensions H W D inch mm 13 9 32 45 5 32 14 13 32 337 1 147 366...

Page 15: ...al Downward Air Filter Removable Washable Mildew Proof Running Current Rated A 0 17 0 15 Power Consumption Rated W 34 34 Power Factor 96 2 98 6 Temperature Control Microcomputer Control Dimensions H W D inch mm 11 7 16 41 5 16 9 3 8 290 1 050 238 Packaged Dimensions H W D inch mm 13 9 32 45 5 32 14 13 32 337 1 147 366 Weight Lbs kg 26 5 12 Gross Weight Lbs kg 38 0 17 Operation Sound H M L SL dB A ...

Page 16: ...ownward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 20 0 18 0 20 0 18 Power Consumption Rated W 40 40 Power Factor 96 2 96 6 96 2 96 6 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D inch mm 11 9 64 30 5 16 7 51 64 283 770 198 11 9 64 30 5 16 7 51 64 283 770 198 Packaged Dimensions H W D inch mm 10 17 64 33 7...

Page 17: ...Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 17 0 15 0 18 0 16 0 17 0 15 0 18 0 16 Power Consumption Rated W 34 34 36 36 34 34 36 36 Power Factor 96 2 98 6 96 2 97 8 96 2 98 6 96 2 97 8 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D inch mm 11 7 16 41 5 16 9 3 8 290 1 050 238 11 7 16 41 5 16 9 3 8 290 1 050 2...

Page 18: ...ard Air Filter Removable Washable Mildew Proof Running Current Rated A 0 17 0 15 0 18 0 16 Power Consumption Rated W 34 34 36 36 Power Factor 96 2 98 6 96 2 97 8 Temperature Control Microcomputer Control Dimensions H W D inch mm 11 7 16 41 5 16 9 3 8 290 1 050 238 Packaged Dimensions H W D inch mm 13 9 32 45 5 32 14 13 32 337 1 147 366 Weight Lbs kg 26 5 12 Gross Weight Lbs kg 38 0 17 Operation So...

Page 19: ...ted Circuit Board Connector Wiring Diagram 11 Part 3 Printed Circuit Board Connector Wiring Diagram 1 Indoor Unit 12 1 1 09 12 Class 12 1 2 15 18 24 Class 14 2 Outdoor Unit 16 2 1 09 12 Class 16 2 2 15 18 24 Class 18 ...

Page 20: ... Connector for adaptor PCB option 6 H1 H2 H3 FG Connector for terminal board 7 V1 Varistor 8 JA Address setting jumper Refer to page 225 for detail JB Fan speed setting when compressor stops for thermostat OFF JC Power failure recovery function auto restart Refer to page 227 for detail 9 LED A LED for service monitor green 10 FU1 F1U Fuse 3 15A 250V 1 S27 Connector for control PCB 2 SW1 S1W Forced...

Page 21: ...or Unit Printed Circuit Board Connector Wiring Diagram 13 PCB Detail PCB 1 Control PCB PCB 2 Display PCB FU1 H1 H3 V1 H2 FG S200 LED A S32 S26 S6 JA JC JB S403 2P206569 4 S27 SW1 Solder side LED2 LED1 RTH1 3P206563 1 ...

Page 22: ...hanger thermistor 7 H1 H2 H3 FG Connector for terminal board 8 JA Address setting jumper Refer to page 225 for detail JB Fan speed setting when compressor stops for thermostat OFF JC Power failure recovery function auto restart Refer to page 227 for detail 9 LED A LED for service monitor green 10 FU1 Fuse 3 15 A 250 V 11 V1 Varistor 1 S29 Connector for control PCB 2 SW1 S1W Forced cooling operatio...

Page 23: ...ng Diagram 15 PCB Detail PCB 1 Control PCB PCB 2 Signal Receiver PCB PCB 3 Buzzer PCB PCB 4 Display PCB LED3 does not function S1 V1 FU1 S6 2P099167 2 JC JB JA LED A S21 H1 S26 S28 H2 H3 FG S32 SW1 S29 2P099167 2 2P099167 2 RTH1 S38 S27 LED2 S37 2P099167 2 LED1 ...

Page 24: ...or 6 FU1 Fuse 3 15 A 250 V 7 FU3 Fuse 20 A 250 V 8 V2 V3 Varistor 1 S10 Connector for filter PCB 2 S20 Connector for electronic expansion valve coil 3 S40 Connector for overload protector 4 S70 Connector for fan motor 5 S80 Connector for four way valve coil 6 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 7 HL3 HN3 Connector for filter PCB 8 HR2 Connector f...

Page 25: ...Unit Printed Circuit Board Connector Wiring Diagram 17 PCB Detail PCB 1 Filter PCB PCB 2 Main PCB HR1 S11 HL2 HN2 E1 E2 V2 AC2 AC1 S FU3 3P257381 1 V3 FU1 S70 S10 S90 LED A S40 S20 S80 HL3 HN3 FU2 HR2 W V U V1 2P257375 2 ...

Page 26: ...U3 Fuse 30 A 250 V 8 V2 V3 Varistor 9 SW1 Forced cooling operation ON OFF switch 1 S10 Connector for S11 on filter PCB 2 S12 Connector for HL4 HN4 on filter PCB 3 S20 Connector for electronic expansion valve coil 4 S40 Connector for overload protector 5 S70 Connector for fan motor 6 S80 Connector for four way valve coil 7 S90 Connector for thermistors outdoor temperature outdoor heat exchanger dis...

Page 27: ... Printed Circuit Board Connector Wiring Diagram 19 PCB Detail PCB 1 Filter PCB PCB 2 Main PCB 3P273862 1 SW1 S11 FU1 FU3 V2 V3 E2 E1 HN2 HL2 HN4 HL4 S HL1 HN1 S80 S10 2P273854 1 S70 S20 S40 S90 FU2 LED A U V W HN3 HL3 S12 V1 ...

Page 28: ...CONO Operation 29 1 10 Inverter POWERFUL Operation 30 1 11 Other Functions 31 2 Function of Thermistor 32 3 Control Specification 33 3 1 Mode Hierarchy 33 3 2 Frequency Control 34 3 3 Controls at Mode Changing Start up 36 3 4 Discharge Pipe Temperature Control 39 3 5 Input Current Control 40 3 6 Freeze up Protection Control 41 3 7 Heating Peak cut Control 41 3 8 Outdoor Fan Control 42 3 9 Liquid C...

Page 29: ...f the room depending on the type of the indoor unit or installation condition Practically the temperature control is done by the target temperature appropriately adjusted for the indoor unit and the temperature detected by room temperature thermistor 1 2 Frequency Principle Main Control Parameters The compressor is frequency controlled during normal operation The target frequency is set by the fol...

Page 30: ...eep the room temperature constant Energy saving heating and cooling Once the set temperature is reached the energy saving operation enables to maintain the room temperature at low power Phase Description 1 The supplied AC power source is converted into the DC power source for the present 2 The DC power source is reconverted into the three phase AC power source with variable frequency When the freq...

Page 31: ...tic synthetic resin provide a wide range of airflow that guarantees a comfortable air distribution Auto Swing The following table explains the auto swing process for cooling dry heating and fan COMFORT AIRFLOW Operation 09 12 class The horizontal blade louver is controlled not to blow the air directly on the person in the room Frequency Functions Low Four way valve operation compensation Refer to ...

Page 32: ...utomatic Cooling The following drawing explains the principle of fan speed control for cooling 09 12 class In automatic fan speed operation upper limit is at M tap in 30 minutes from the operation start 15 18 24 class Heating On heating mode the fan speed is regulated according to the indoor heat exchanger temperature and the difference between the room thermistor temperature and the target temper...

Page 33: ...een the room thermistor temperature at start up and the target temperature is divided into two zones Then the unit operates in the dry mode with 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 C 75 2 F or more Room thermistor temperature...

Page 34: ...mines the target temperature Tt Ts 18 30 C 64 4 86 F 2 The target temperature Tt is calculated as Tt Ts C where C is the correction value C 0 C 0 F 3 Thermostat ON OFF point and mode switching point are as follows Tr means the room thermistor temperature 1 Heating Cooling switching point Tr Tt 2 5 C 4 5 F 2 Cooling Heating switching point Tr Tt 2 5 C 4 5 F 3 Thermostat ON OFF point is the same as ...

Page 35: ...em resumes from defrost control in any zones except A The operation turns on in any zones except A The monitoring time has passed while the temperature difference is in the zone B Cooling Dry 10 minutes Heating 10 seconds Cooling Dry Heating Refer to Temperature Control on page 21 for detail B A OFF ON C Room thermistor temperature target temperature 1 5 C 2 7 F R14663 Cooling 0 5 C 0 9 F Dry 0 5 ...

Page 36: ...ble sleeping conditions and also conserves electricity Cooling 09 12 class 15 18 24 class Heating R14453 TIMER operation NIGHT SET Mode ON Target temperature 0 5 C 0 9 F temperature shift Operation stops at the set hours 1 hour 0 5 C 0 9 F 0 5 C 0 9 F 0 5 C 0 9 F R14662 0 5 C 0 9 F temperature shift TIMER operation NIGHT SET Mode ON A 0 5 C 0 9 F temperature shift B Target temperature remains the ...

Page 37: ...ed from the wireless remote controller by pushing the ECONO button When this function is activated the maximum capacity also decreases The remote controller can send the ECONO command when the unit is in COOL HEAT DRY or AUTO operation This function can only be set when the unit is running Pressing the ON OFF button on the remote controller cancels the function This function and POWERFUL operation...

Page 38: ... POWERFUL operation in cooling mode Operation mode Fan speed Target temperature COOL H tap A rpm 18 C 64 4 F DRY Dry rotating speed A rpm Lowered by 2 5 C 4 5 F HEAT H tap A rpm 31 32 C 87 8 89 6 F FAN H tap A rpm AUTO Same as cooling heating in POWERFUL operation The target temperature is kept unchanged R13571 Target temp Fan A rpm 18 C 64 4 F H tap Set tap 20 minutes It should be the lower limit...

Page 39: ...ion Forced cooling operation can be started by pressing the ON OFF button for 5 to 9 seconds while the unit is not operating Refer to page 222 for detail Note When the ON OFF button is pressed for 10 seconds or more the forced cooling operation is stopped 1 11 4 Titanium Apatite Photocatalytic Air Purifying Filter This filter combines the Air Purifying Filter and Titanium Apatite Photocatalytic De...

Page 40: ...ompressor rises abnormally the operating frequency becomes lower or the operation halts 2 The discharge pipe thermistor is used for detecting disconnection of the discharge pipe thermistor 3 Indoor Heat Exchanger Thermistor 1 The indoor heat exchanger thermistor is used for controlling target discharge pipe temperature The system sets the target discharge pipe temperature according to the outdoor ...

Page 41: ...ation command is regarded as cooling operation R14428 Air conditioner control mode Forced operation mode Forced cooling operation Power transistor test mode Normal operation mode Fan Cooling includes drying Stop indoor unit OFF Preheating operation Discharging from capacitor Stop Air conditioner control mode Forced operation mode Forced cooling operation Power transistor test mode Normal operation...

Page 42: ...unctions Compressor protection input current discharge pipe temperature freeze up protection 3 Determine lower limit frequency The maximum value is set as an lower limit frequency among the frequency lower limits of the following function Pressure difference upkeep 4 Determine prohibited frequency There is a certain prohibited frequency such as a power supply frequency For Heat Pump Model 1 Determ...

Page 43: ...Frequency Up Down by D Signal 1 P control The D value is calculated in each sampling time 20 seconds and the frequency is adjusted according to its difference from the frequency previously calculated 2 I control If the operating frequency does not change for more than a certain fixed time the frequency is adjusted according to the D value When the D value is low the frequency is lowered When the D...

Page 44: ...ischarge pipe temperature 20 C 68 F OFF condition Discharge pipe temperature 22 C 71 6 F Radiation fin temperature 90 C 194 F 15 18 24 class ON Condition When the discharge pipe temperature is below 10 C 50 F the inverter operation in open phase starts OFF Condition When the discharge pipe temperature is higher than 12 C 54 F the inverter operation in open phase stops 3 3 2 Four Way Valve Switchin...

Page 45: ... heating after defrosting 5 When starting compressor for the first time after resetting with the power ON 6 When starting compressor after the fault of switching over cooling heating The lower limit of frequency keeps A Hz for B seconds with any conditions 1 through 6 above 3 3 4 3 minute Standby Turning on the compressor is prohibited for 3 minutes after turning it off Except when defrosting 3 3 ...

Page 46: ...ecification SiUS041111 38 Function and Control 15 18 24 class A Hz 52 B Hz 66 C Hz 78 D Hz Cooling 98 Heating 96 E seconds 120 F seconds 120 G seconds 480 H seconds 60 sec Time R13906 Hz Frequency C D B E F G H A ...

Page 47: ...e 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 zone The upper limit of frequency is canceled 09 12 class 15 18 24 class A 110 C 230 F 118 C 244 4 F B 105 C 221 F 108 C 226 4 F C 101 C 213 8 F 103 C 217 4 F D 99...

Page 48: ...cy is defined as operation frequency 2 Hz After this the output frequency is pulled down 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 09 12 class 15 18 24 class Limitation of current dropping and stop value according to the outdoor temperature The current drops when outdoor temperature becomes high...

Page 49: ...ormal high pressure Detail R14664 Reset zone Indoor heat exchanger thermistor temperature Up zone Keep zone Dropping zone Stop zone 13 C 55 4 F Reference 7 C 44 6 F 5 C 41 F 3 C 37 4 F 0 C 32 F 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 l...

Page 50: ... of the outdoor fan is reduced by the command of the indoor unit quiet operation 7 Fan speed control for POWERFUL operation 15 18 24 class The rotation speed of the outdoor fan is increased while the POWERFUL operation 8 Fan speed control for pressure difference upkeep The rotation speed of the outdoor fan is controlled for keeping the pressure difference while cooling with low outdoor temperature...

Page 51: ...e than 28 minutes of accumulated time pass since the start of the operation or ending the previous defrosting 09 12 class More than 15 25 minutes depending on the duration of the previous defrost control of accumulated time have passed since the start of the operation or ending the previous defrosting 15 18 24 class Conditions for Canceling Defrost 09 12 class The judgment is made with outdoor hea...

Page 52: ...dgment is made with outdoor heat exchanger temperature 6 30 C 42 8 86 F Frequency Compressor Four way valve Fan ON OFF ON OFF ON OFF 0 Hz 76 Hz 8 sec 400 pulse 450 pulse 450 pulse Initial opening PI control 8 sec 40 sec R14667 Electronic expansion valve opening 50 sec 120 570 sec ...

Page 53: ...control h function not function Cooling h h h h h h h h h h h h h h h h h h h h h h h h h h h h h Heating R14458 h h h h h h Starting control Control when the frequency changes Target discharge pipe temperature control Control for disconnection of the discharge pipe thermistor High discharge pipe temperature control Pressure equalizing control Opening limit control Starting control Control when th...

Page 54: ...ng 3 11 4 Starting Operation Control The electronic expansion valve opening is controlled when the operation starts and prevents the superheating or liquid compression 3 11 5 Control when the frequency changes When the target discharge pipe temperature control is active if the target frequency is changed for a specified value in a certain time period the target discharge pipe temperature control i...

Page 55: ...t exchanger temperature 2 When the operation mode is heating When the following condition is fulfilled the discharge pipe thermistor disconnection is ascertained Discharge pipe temperature 6 C 10 8 F indoor heat exchanger temperature Adjustment when the thermistor is disconnected When the disconnection is ascertained the compressor continues operation for 9 minutes and then stops When the compress...

Page 56: ...ol Outline I Detecting by power consumption If the power consumption is below the specified value and the frequency is higher than the specified frequency it is regarded as refrigerant shortage The power consumption is low comparing with that in the normal operation when refrigerant is insufficient and refrigerant shortage is detected by checking a power consumption II Detecting by discharge pipe ...

Page 57: ...he Airflow Direction and Rate 55 2 4 COMFORT AIRFLOW Operation 57 2 5 POWERFUL Operation 58 2 6 ECONO Operation 59 2 7 OFF TIMER Operation 60 2 8 ON TIMER Operation 61 3 15 18 24 Class 62 3 1 Remote Controller 62 3 2 AUTO DRY COOL HEAT FAN Operation 64 3 3 Adjusting the Airflow Direction and Rate 66 3 4 POWERFUL Operation 68 3 5 OFF TIMER Operation 69 3 6 ON TIMER Operation 70 ...

Page 58: ...eat well and how to use it efficiently Providing instructions to the user can reduce requests for servicing by 80 However proficient the installation and operating functions of the AC system are the customer may fault either the room air conditioner or its installation work when it is actually due to improper handling The installation work and the handing over of the unit can only be considered co...

Page 59: ... drop the remote controller Do not get it wet The maximum distance for communication is approximately 23ft 7m FAN setting button Selects the airflow rate setting Page14 Page16 POWERFUL button POWERFUL operation Display LCD Displays the current settings In this illustration each section is shown with all its displays on for the purpose of explanation TEMPERATURE adjustment buttons Changes the tempe...

Page 60: ...EAT FAN Page11 Page 18 19 COMFORT button COMFORT AIRFLOW operation OFF TIMER button Cancels the timer setting Page 15 Page18 TIMER CANCEL button Page 18 19 ECONO button ECONO operation Page 17 Page 13 SWING button Adjusting the airflow direction ON TIMER button CLOCK button SELECT button Changes the ON OFF TIMER settings Page 19 ...

Page 61: ...the air conditioner The heat pump system heats the room by circulating hot air around all parts of the room After the start of HEAT operation it takes some time before the room gets warmer In HEAT operation frost may occur on the outdoor unit and lower the heating capacity In that case the system switches into defrosting operation to take away the frost During defrosting operation hot air does not...

Page 62: ...ng The outdoor unit consumes 3 4 34btu h 1 10W to have its electric components work even while it is not operating During standby electricity saving mode about 3 4btu h 1W The outdoor unit consumes about 120btu h 35W of power at the time of compressor preheating If you are not going to use the air conditioner for a long period for example in spring or autumn turn the breaker off Use the air condit...

Page 63: ...t desired position This function is effective while louver is in auto swing mode Press when the louver has reached the desired position The louver will stop moving is no longer displayed on the LCD To adjust the fins vertical blades Hold the knob and move the fins You will find a knob on the left side and the right side blades When the unit is installed in the corner of a room the direction of the...

Page 64: ...r kept stopped in the downward direction the louver will automatically start operating in approximately an hour in order to prevent dew condensation Note on airflow rate setting At smaller airflow rates the cooling heating effect is also smaller CAUTION Always use a remote controller to adjust the angles of the louver If you attempt to move the louver and fins forcibly with hand when they are swin...

Page 65: ... The louver will go down To cancel COMFORT AIRFLOW operation Press again The louver will return to the memory position from before COMFORT AIRFLOW operation is no longer displayed on the LCD COOL operation HEAT operation NOTE Notes on COMFORT AIRFLOW operation The louver position will change preventing air from blowing directly on the occupants of the room POWERFUL operation and COMFORT AIRFLOW op...

Page 66: ...for 20 minutes Back to normal operation NOTE Notes on POWERFUL operation When using POWERFUL operation there are some functions which are not available POWERFUL operation cannot be used together with ECONO and COMFORT AIRFLOW operation Priority is given to the function of whichever button is pressed last POWERFUL operation will not increase the capacity of the air conditioner if the air conditione...

Page 67: ...g ECONO operation The circuit breaker is unlikely to trip even if the air conditioner and other appliances are used at same time This diagram is a representation for illustrative purposes only The maximum running current and power consumption of the air conditioner in ECONO operation vary with the connecting outdoor unit Running current and power consumption Maximum during normal operation Maximum...

Page 68: ...pt in the memory The memory is canceled when remote controller batteries are replaced When operating the unit via the ON OFF TIMER the actual length of operation may vary from the time entered by the user Maximum approximately 10 minutes NIGHT SET mode When the OFF TIMER is set the air conditioner automatically adjusts the temperature setting 0 9 F 0 5 C up in COOL 3 6 F 2 0 C down in HEAT to prev...

Page 69: ...nutes Holding down either button changes the setting rapidly 3 Press again and setting time are displayed on the LCD The TIMER lamp lights yellow Display Press and setting time are no longer displayed on the LCD and day of the week are displayed on the LCD The TIMER lamp goes off A sample setting for combining the 2 timers is shown below Example Present time 23 00 The unit operating OFF TIMER at 0...

Page 70: ...he remote controller Do not get it wet The maximum distance for communication is approximately 23ft 7m Selects the airflow rate setting FAN setting button Page14 POWERFUL button POWERFUL operation Page15 ARC452A20 Page8 Open the front cover Front cover Page11 Press this button once to start operation Press once again to stop it ON OFF button Page12 Changes the temperature setting TEMPERATURE adjus...

Page 71: ...he operation mode AUTO DRY COOL HEAT FAN MODE selector button Page16 OFF TIMER button TIMER CANCEL button Cancels the timer setting Page16 17 Page16 17 Changes the ON OFF TIMER settings SELECT button CLOCK button Page17 ON TIMER button Page13 SWING button Adjusting the airflow direction ...

Page 72: ...mbination with the air conditioner The heat pump system heats the room by circulating hot air around all parts of the room After the start of HEAT operation it takes some time before the room gets warmer In HEAT operation frost may occur on the outdoor unit and lower the heating capacity In that case the system switches into defrosting operation to take away the frost During defrosting operation h...

Page 73: ...about every 2 weeks Notes on the operating conditions The air conditioner always consumes a small amount of electricity even while it is not operating If you are not going to use the air conditioner for a long period for example in spring or autumn turn the breaker off Use the air conditioner in the following conditions Operating conditions MODE COOL HEAT DRY Outdoor temperature 50 115 F 10 46 C I...

Page 74: ... LCD The louvers horizontal blades will begin to swing This function is effective while louvers are in auto swing mode Press when the louvers have reached the desired position The louvers will stop moving is no longer displayed on the LCD Hold the knob and move the fins You will find a knob on the left side and the right side blades When the unit is installed in the corner of a room the direction ...

Page 75: ... and fins forcibly with hand when they are swinging the mechanism may be broken Be careful when adjusting the fins Inside the air outlet a fan is rotating at a high speed At smaller airflow rates the cooling heating effect is also smaller Note on airflow rate setting If the air conditioner is HEAT or DRY operation with the louvers kept stopped in the downward direction the louvers will automatical...

Page 76: ...ture setting is lowered by 4 5 F 2 5 C and the airflow rate is slightly increased In FAN operation The airflow rate is fixed to the maximum setting 15 Example POWERFUL Operation POWERFUL operation quickly maximizes the cooling heating effect in any operation mode You can get the maximum capacity To start POWERFUL operation To cancel POWERFUL operation POWERFUL operation ends in 20 minutes Then the...

Page 77: ...changes the time setting rapidly 3 Press again and setting time are displayed on the LCD The TIMER lamp lights yellow Display Press and setting time are no longer displayed on the LCD and day of the week are displayed on the LCD The TIMER lamp goes off Notes on TIMER operation When TIMER is set the present time is not displayed Once you set ON OFFTIMER the time setting is kept in the memory The me...

Page 78: ...minutes Holding down either button changes the setting rapidly 3 Press again and setting time are displayed on the LCD The TIMER lamp lights yellow Display Press and setting time are no longer displayed on the LCD and day of the week are displayed on the LCD The TIMER lamp goes off To combine ON TIMER and OFF TIMER A sample setting for combining the 2 timers is shown below Example Present time 23 ...

Page 79: ... 4 13 Four Way Valve Abnormality 94 4 14 Discharge Pipe Temperature Control 96 4 15 High Pressure Control in Cooling 98 4 16 Compressor System Sensor Abnormality 100 4 17 Position Sensor Abnormality 101 4 18 DC Voltage Current Sensor Abnormality 09 12 Class Only 103 4 19 Thermistor or Related Abnormality Outdoor Unit 104 4 20 Electrical Box Temperature Rise 106 4 21 Radiation Fin Temperature Rise ...

Page 80: ...SiUS041111 72 Service Diagnosis 5 11 Outdoor Fan System Check 124 5 12 Main Circuit Short Check 125 5 13 Power Module Check 126 ...

Page 81: ...en a signal transmission error occurs between the indoor and outdoor units In either case conduct the diagnostic procedure described in the following pages Service Monitor The indoor unit has one green LED LED A on the control PCB When the microcomputer works in order the LED A blinks 1 2 Outdoor Unit The outdoor unit has one green LED LED A on the main PCB When the microcomputer works in order th...

Page 82: ... Check the outdoor temperature Heating operation cannot be used when the outdoor temperature is 24 C 75 2 F or higher and cooling operation cannot be used when the outdoor temperature is below 10 C 50 F Diagnose with remote controller indication 78 The unit operates but does not cool or does not heat Check for wiring and piping errors in the connection between the indoor unit and outdoor unit Chec...

Page 83: ...onding codes 2 To return to the normal mode hold the timer cancel button down for 5 seconds When the remote controller is left untouched for 60 seconds it also returns to the normal mode 3 Not all the error codes are displayed When you cannot find the error code try the check method 2 Refer to page 76 No Code No Code No Code 1 00 13 C7 25 UA 2 U4 14 A3 26 UH 3 L5 15 H8 27 P4 4 E6 16 H9 28 L3 5 H6 ...

Page 84: ... until you hear the beep s 3 Diagnose by the sound beep The left side number does not correspond with the error code beep beep The left side number corresponds with the error code but the right side number does not long beep Both the left side and right side numbers correspond with the error code Error codes and description Refer to page 78 4 Press the MODE button The right side number blinks R145...

Page 85: ...ight side numbers correspond with the error code Error codes and description Refer to page 78 7 Determine the error code The numbers indicated when you hear the long beep are the error code Error codes and description Refer to page 78 8 Press the MODE button to exit from the diagnosis mode The display means the trial operation mode Refer to page 223 for trial operation 9 Press the ON OFF button tw...

Page 86: ... 85 C9 Room temperature thermistor or related abnormality 85 Outdoor Unit E1 Outdoor unit PCB abnormality 89 E5 OL activation compressor overload 90 E6 Compressor lock 91 E7 DC fan lock 92 E8 Input overcurrent detection 93 EA Four way valve abnormality 94 F3 Discharge pipe temperature control 96 F6 High pressure control in cooling 98 H0 Compressor system sensor abnormality 100 H6 Position sensor a...

Page 87: ...ion of connector Troubleshooting Note Check the following connector Check the combination of the indoor and outdoor unit OK OK Check the connection of connectors See Note Correct the connection Error repeats YES NO NO YES NO YES R11704 Caution To secure the connection once disconnect the connector and then reconnect it Match the compatible models Replace the indoor unit PCB 1 Replace the indoor un...

Page 88: ...eating operation the temperature detected by the indoor heat exchanger thermistor is used for the heating peak cut control operation halt outdoor fan stop etc Malfunction Decision Conditions Freeze up protection control During cooling operation the indoor heat exchanger temperature is below 0 C 32 F Heating peak cut control During heating operation the indoor heat exchanger temperature is above 65...

Page 89: ...ean the air filter Clean the indoor heat exchanger Replace the indoor unit PCB Replace the thermistor Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Check the air passage Is there any short circuit Check the air filter Is it very dirty Check the dust accumulation on the indoor heat exchanger Is it very dirty Does it conform to the thermis...

Page 90: ... fan motor operation Malfunction Decision Conditions The detected rotation speed does not reach the demanded rotation speed of the target tap and is less than 50 of the maximum fan motor rotation speed Supposed Causes Disconnection of connector Foreign matters stuck in the fan Layer short inside the fan motor winding Breaking of wire inside the fan motor Breaking of the fan motor lead wires Defect...

Page 91: ...wer on again Check No 03 Check the motor control voltage Is the motor control voltage 15 VDC generated Check No 03 Check the indoor unit PCB for rotation pulse Is the rotation pulse generated NO YES YES YES NO NO To secure the connection once disconnect the connector and then reconnect it Correct the connection Remove them Replace the indoor fan motor Replace the indoor unit PCB 1 Replace the indo...

Page 92: ...r disconnecting connectors or parts may be damaged R14436 NO YES YES NO YES NO Replace the indoor fan motor Replace the indoor unit PCB Replace the indoor unit PCB Replace the indoor fan motor Replace the indoor fan motor and the indoor unit PCB Turn off the power supply and rotate the fan by hand Does the fan rotate smoothly Turn the power on and start operation Does the fan rotate Check No 02 Ch...

Page 93: ...mpressor operation Supposed Causes Disconnection of connector Defective thermistor Defective indoor unit PCB Troubleshooting Check No 01 Refer to P 116 C4 Indoor heat exchanger thermistor C9 Room temperature thermistor YES R14406 NO YES NO Caution Correct the connection Replace the thermistor Replace the indoor unit PCB Be sure to turn off the power switch before connecting or disconnecting connec...

Page 94: ...unit in indoor unit outdoor unit signal transmission is checked whether it is normal Malfunction Decision Conditions The data sent from the outdoor unit cannot be received normally or the content of the data is abnormal Supposed Causes Wiring error Breaking of the connection wires between the indoor and outdoor units wire No 3 Defective outdoor unit PCB Defective indoor unit PCB Disturbed power su...

Page 95: ...ing error Properly insulated Check the LED A on the outdoor unit PCB Is LED A blinking Is there any disturbance YES YES Replace the indoor unit PCB Locate the cause of the disturbance of the power supply waveform and correct it NO R14437 NO YES YES NO NO Caution Correct the indoor unit outdoor unit connection wires Diagnose the outdoor unit PCB Replace the connection wires between the indoor unit ...

Page 96: ...iring of connecting wires Wrong indoor unit PCB or outdoor unit PCB mounted Defective indoor unit PCB Defective outdoor unit PCB Troubleshooting R11707 Caution NO YES YES YES NO NO Check the code numbers 2P01234 for example of the indoor and outdoor unit PCB with the Parts List Match the compatible models Change for the correct PCB Replace the indoor unit PCB or the outdoor unit PCB Correct the co...

Page 97: ...cross signal is not detected Supposed Causes Defective outdoor unit PCB Broken harness between PCBs Noise Momentary fall 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 NO YES YES R14253 YES NO NO Replace the outdoor unit PCB Ground the system Zero cross signal abnormality Replace ...

Page 98: ...e stop valve Troubleshooting Check No 01 Refer to P 116 Check No 12 Refer to P 118 Check No 13 Refer to P 119 Check No 14 Refer to P 119 R14438 Caution YES NG NO OK OK NG NG OK NG OK Refrigerant shortage Water mixed Stop valve Discharge pipe thermistor Insert the thermistor in position Replace the discharge pipe thermistor Replace the electronic expansion valve or the coil Refer to the refrigerant...

Page 99: ...ion NO YES YES NO NO YES Correct the power supply or replace the outdoor unit PCB Inverter checker Part No 1225477 Replace the compressor Replace the compressor Check the electronic expansion valve Replace it as required Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Precaution before turning on the power again Make sure the power has bee...

Page 100: ...ses Disconnection of fan motor Foreign matters stuck in the fan Defective fan motor Defective outdoor unit PCB Troubleshooting Check No 16 Refer to P 122 R14410 Caution YES YES NO YES NO NO YES NO Turn on the power Rotate the fan Check No 16 Check the rotation pulse input on the outdoor unit PCB Turn off the power and reconnect the connector Remove them Replace the outdoor fan motor Replace the ou...

Page 101: ...e 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 R14440 NO YES YES NO Replace the outdoor unit PCB Correct the power supply or replace th...

Page 102: ...function Decision Conditions A following condition continues over 10 minutes after operating for 5 minutes Cooling Dry room thermistor temp indoor heat exchanger temp 5 C 9 F Heating indoor heat exchanger temp room thermistor temp 5 C 9 F 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 wa...

Page 103: ...1000 2000 W Check No 13 Check the four way valve switching output Any thermistor disconnected Check No 01 Check the thermistors Check No 14 Check the refrigerant line NG OK NO OK NG OK YES NG Correct it Reconnect it YES YES YES NO NO Replace the outdoor unit PCB Replace the defective thermistor Refer to the refrigerant line check procedure Replace the four way valve defective or dust clogged Recon...

Page 104: ...n for about 60 minutes without any other error Supposed Causes Defective discharge pipe thermistor Defective outdoor heat exchanger thermistor or outdoor temperature thermistor Defective electronic expansion valve or coil Refrigerant shortage Defective four way valve Water mixed in refrigerant Defective stop valve Defective outdoor unit PCB Stop temperatures A B C F C F 1 above 50 Hz rising above ...

Page 105: ...e check procedure Replace the outdoor unit PCB Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Check No 01 Check the thermistors Check No 12 Check the electronic expansion valve R14412 Caution NG OK OK OK NG NG Refrigerant shortage Four way valve Water mixed Stop valve Discharge pipe thermistor Outdoor heat exchanger thermistor Outdoor tem...

Page 106: ...xchanger thermistor exceeds the limit Malfunction Decision Conditions The temperature sensed by the outdoor heat exchanger thermistor rises above about 60 C 140 F The error is cleared when the temperature drops below about 50 C 122 F Supposed Causes The installation space is not large enough Dirty outdoor heat exchanger Defective outdoor fan motor Defective stop valve Defective electronic expansio...

Page 107: ...outdoor unit PCB Replace the electronic expansion valve or the coil Replace the outdoor unit 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 Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Check No 01 Check the outdoor heat exchanger thermistor Ch...

Page 108: ...nverted to voltage value The DC voltage before compressor start up is below 50 V Supposed Causes Broken or disconnection of 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 R11712 YES YES NO Replace the harness No problem Keep on running Replace the outdoor unit PCB Check the rel...

Page 109: ...ction circuit Malfunction Decision Conditions The compressor fails to start in about 15 seconds after the compressor run command signal is sent If the error repeats the system is shut down Reset condition Continuous run for about 11 minutes without any other error Supposed Causes Disconnection of compressor relay harness Defective compressor Defective outdoor unit PCB Start up failure caused by th...

Page 110: ...place the outdoor unit PCB Replace the compressor Correct the power supply or replace the outdoor unit PCB Reconnect them as specified Replace the outdoor unit PCB Inverter checker Part No 1225477 NO YES Replace the stop valve Turn off the power Check the power supply voltage Voltage as rated Check No 18 Check the discharge pressure OK Check No 20 Check the short circuit of the diode bridge Normal...

Page 111: ...ncy and the input current Malfunction Decision Conditions The compressor running frequency is above 52 Hz The input current is also below 0 1 A 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 Caution Be sure to turn off the power switch be...

Page 112: ...ith 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 corresponding to the error code Defective heat exchanger thermistor in the case of J3 error outdoor heat exchanger thermistor in cooling operation or indoor heat exchanger thermistor in heating oper...

Page 113: ...tors 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 Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Turn on the power again Error displaye...

Page 114: ...off the radiation fin temperature is above A The error is cleared when the radiation fin temperature drops below B To cool the electrical components the outdoor fan starts when the radiation fin temperature rises above C and stops when it drops below B Supposed Causes Defective outdoor fan motor Short circuit Defective radiation fin thermistor Disconnection of connector Defective outdoor unit PCB ...

Page 115: ...eck the radiation fin temperature Turn off the power and turn it on again WARNING Replace the outdoor unit PCB Replace the fan motor Correct the connectors and fan motor lead wire Replace the outdoor unit PCB Clean up the radiation fin Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Radiation fin dirty Check No 19 Check the outdoor fan or ...

Page 116: ...essor on is above A The error is cleared when the radiation fin temperature drops below B 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 fan motor Short circuit Defective radiation fin thermistor Disconnection of connector Defective outdoor unit PCB Silicon grease is not applied properly on ...

Page 117: ...bove A Check No 17 Check the installation condition Check if the silicon grease applied properly on the radiation fin If not apply it See Note Replace the outdoor unit PCB Replace the fan motor Correct the connectors and fan motor leads Replace the outdoor unit PCB Clean up the radiation fin Silicon grease Part No 1172698 Be sure to turn off the power switch before connecting or disconnecting conn...

Page 118: ...r occurs while the compressor is running A 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 modu...

Page 119: ...rter checker Part No 1225477 Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Stop valve fully open Error again Check No 15 Check with the inverter checker Any LED off Check the supply voltage Voltage as rated Monitor the supply voltage discharge and suction pressures and other factors for a long term Possible causes Momentary fall of suppl...

Page 120: ...ctronic expansion valve D Discharge pipe temperature C E target discharge pipe temperature C F C Discharge pipe temperature F E target discharge pipe temperature F G F Refrigerant shortage detection III 15 18 24 class only When the difference of the temperature is smaller than H it is regarded as refrigerant shortage If the error repeats the system is shut down Reset condition Continuous run for a...

Page 121: ...ansistor harness for looseness Correct it as required Also replace the cracked pipe Check the pipes for improper contact Correct them as required Also replace the cracked pipe Replace the electronic expansion valve Replace the defective one s Completed Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged OK NO YES Replace the compressor Complet...

Page 122: ...ltage detected by the DC voltage detection circuit is below about 200 V 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 The compressor stops if the error occurs and restarts automatically after 3 minute standby Supposed Causes Supply voltage i...

Page 123: ...before connecting or disconnecting connectors or parts may be damaged NO NO YES NO YES YES Reconnect it Repeat a few times Precaution before turning on the power again Make sure the power has been off for at least 30 seconds Turn on the power again System restarted Supply voltage as specified Check the connection of the compressor harness Loose or disconnected Disturbance factors Noise Power suppl...

Page 124: ... for the PCB and measure Thermistor temperature C F Resistance k Room temperature thermistor for 09 12 class model Other thermistors 20 4 73 4 211 0 15 5 57 0 150 0 10 14 44 7 116 5 5 23 35 3 88 0 0 32 28 2 67 2 5 41 22 6 51 9 10 50 18 3 40 0 15 59 14 8 31 8 20 68 12 1 25 0 25 77 10 0 20 0 30 86 8 2 16 0 35 95 6 9 13 0 40 104 5 8 10 6 45 113 4 9 8 7 50 122 4 1 7 2 R25 C 77 F 10 k B 3435 K R25 C 77...

Page 125: ...en the pins 12 9 and between 9 6 Motor control voltage check 1 Check the connector for connection 2 Check the motor control voltage is generated between the pins 2 3 Rotation pulse check 1 Check the connector for connection 2 Turn the power on and stop the operation 3 Check if the Hall IC generates the rotation pulse 4 times when the fan motor is manually rotated once between the pins 1 3 7 6 5 4 ...

Page 126: ...n valve EV 1 Check to see if the EV connector is correctly connected to the PCB 2 Turn the power off and on again and check to see if the EV generate latching sound 3 If the EV does not generate latching sound in the above step 2 disconnect the connector and check the continuity using a tester 4 Check the continuity between the pins 1 6 2 6 3 6 4 6 If there is no continuity between the pins the EV...

Page 127: ...e coil from the connector and check the continuity Four way valve coil resistance at 1000 2000 W S80 voltage at 208 230 VAC with compressor on Fig 1 Replace the outdoor unit PCB Replace the four way valve coil Replace the four way valve 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 shortage...

Page 128: ...ff Step 2 Install the inverter checker 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 the outdoor unit from ...

Page 129: ...ration starts Diagnose method Diagnose according to 6 LEDs lighting status 1 When all the LEDs are lit uniformly the compressor is defective Replace the compressor 2 When the LEDs are not lit uniformly check the power module Refer to Check No 13 3 If NG in Check No 13 replace the power module control PCB If OK in Check No 13 check if there is any solder cracking on the filter PCB 4 If any solder c...

Page 130: ...C 4 Check that the rotation command voltage between the pins 2 4 is 0 15 VDC 5 Keep operation off and power off Connect the connector S70 6 Check whether 2 pulses 0 15 VDC are output at the pins 1 4 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 Replace the outdoor unit PCB If NG in step 4 Defective...

Page 131: ...e opposite direction R14468 NG YES YES YES Is the discharged air short circuited NO NO NO Is the outdoor heat exchanger very 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 46 C 114 8 F or lower Installation...

Page 132: ...ssor Open the stop valve Replace the pipe installed at the site Clean the dirty one Replace the compressor High Is the stop valve open Is the connection pipe deformed Not dirty Dirty YES NO NO YES YES NO Discharge pressure check R7159 Check the outdoor fan system Outdoor fan system is functioning Go to Check No 15 Reconnect the connector Outdoor fan running Fan motor lead wire connector disconnect...

Page 133: ... Measure the resistance between the pins of the DB1 as below If the resistance is or less than 1 kW short circuit occurs on the main circuit 09 12 class terminal of the tester in case of digital terminal 2 3 4 2 3 1 terminal of the tester in case of digital terminal 4 2 3 1 2 3 Resistance is OK several k several M several k several M Resistance is NG 0 or 0 0 0 or Tester 1 2 3 4 R14675 ...

Page 134: ... the connector press the protrusion on the connector Follow the procedure below to measure resistance between the terminals of the DB1 and the terminals of the compressor with a multi tester Evaluate the measurement results for a judgment Tester 1 2 3 4 R14433 Negative terminal of tester positive terminal for digital tester DB1 UVW DB1 UVW Positive terminal of tester negative terminal for digital ...

Page 135: ...2 3 Removal of Horizontal Blades Vertical Blades 155 2 4 Removal of Electrical Box PCBs Swing Motors 157 2 5 Removal of Indoor Heat Exchanger 162 2 6 Removal of Fan Motor Fan Rotor 165 3 Outdoor Unit 09 12 Class 167 3 1 Removal of Outer Panels 167 3 2 Removal of Outdoor Fan Fan Motor 171 3 3 Removal of Electrical Box PCB 173 3 4 Removal of Sound Blankets 185 3 5 Removal of Four Way Valve 187 3 6 R...

Page 136: ...confirm the signal reception When the ON OFF button is kept pressed for 5 seconds the forced cooling operation is performed for about 15 minutes 2 Remove the air filters 1 Open the front panel to the position where it stops 2 Slightly push up the knob at the center of the air filter The air filter is not marked for difference between the right and left sides The air filter can be set easily by ins...

Page 137: ...g the air filter and unfastening the projections from the air filter frame 3 Remove the Titanium apatite photocatalytic air purifying filter from its frame at 5 positions by bending it To prevent the damage do not remove the Titanium apatite photocatalytic air purifying filter from the frame when cleaning it The Titanium apatite photocatalytic air purifying filter is not marked for difference betw...

Page 138: ...haft while bending the horizontal blade slightly The center shaft can be released easily by bending the blade Cautions for reassembling 1 Since the key pattern hook is provided rotate the horizontal blade and fit it to the right shaft first 2 Fit the horizontal blade to the center and left shafts 3 Unfasten the left shaft of the horizontal blade 4 Unfasten the right shaft of the horizontal blade R...

Page 139: ...SiUS041111 Indoor Unit 09 12 Class Removal Procedure 131 5 Remove the horizontal blade Step Procedure Points R11626 ...

Page 140: ...t panel over the position where it stops 2 Release the right rotary shaft The rotary shaft on each side can be released easily by sliding each shaft inwards 3 Release the left rotary shaft 4 Remove the front panel When reassembling the front panel fit the right and left rotary shafts one by one into the grooves and fully push them in position Left side Front panel Right side R11627 Right Rotary sh...

Page 141: ...ille has 3 hooks on the upper part Refer to the removal procedure in a reverse way when reassembling 3 Press each hook and also lift the grille up to unfasten the hooks 4 Pull the upper part of the front grille out and lift the lower part up and then remove the front grille The convex marks on the front panel indicate the position of the hooks When reassembling make sure that all the 3 hooks are f...

Page 142: ...ts 1 Disconnect the connecting wires Preparation Remove the front grille according to the Removal of Front Grille 1 Remove the screw of the service cover 2 Pull out the service cover down in the direction of the arrow 3 The figure shows the connections of wire harnesses 4 Remove the screw of the wire retaining plate R14676 Service cover R11636 Terminal board Electrical box Wire retaining plate Ind...

Page 143: ...white 2 power supply red 3 transmission yellow green ground 6 Pull out the indoor heat exchanger thermistor Take care not to lose the clip of thermistor 2 Remove the electrical box 1 Remove the screw and disconnect the ground wire Step Procedure Points Terminal board R11639 Connecting wires R11640 Indoor heat exchanger thermistor Thermistor Clip R11268 Screw Ground R11641 ...

Page 144: ...Remove the screw of the electrical box 4 Slide the electrical box to the right first and detach the horizontal blade from the electrical box 5 Pull the electrical box There is a hook on the bottom frame When reassembling fit the rear side of the electrical box to the hook Step Procedure Points R11642 S200 R14602 Hook R11643 R11644 R11657 Hook Bottom frame ...

Page 145: ...hooks at the bottom Remove the fan guard Repeat the same procedure to remove the fan guard on the other side 3 Unfasten the hooks at the upper 2 positions A vertical blade assembly has 6 fins It is impossible to replace only one fin The vertical blade assembly is not marked for difference between right and left Step Procedure Points Hook Fan guard Hook R14608 R11646 Hook R11647 Hook Hook R8020 Ver...

Page 146: ...dure 4 Unfasten the 3 hooks at the shaft mounting part by pressing them with a flat screwdriver 5 Remove the vertical blade assembly Repeat the same procedure to remove the vertical blade assembly on the other side Step Procedure Points R8022 Hook R8023 ...

Page 147: ...rocedure Points 1 Remove the shield plate 2 Preparation Remove the electrical box according to the Removal of Electrical Box Vertical Blades 1 Unfasten the hooks at the upper 2 positions of the shield plate 2 2 Unfasten the hook at the lower position and remove the shield plate 2 2 Remove the swing motor 1 Remove the screw of the swing motor R14603 Hook Shield plate 2 Electrical box Hook R11649 Sw...

Page 148: ...swing motor has a hook Press the hook with a flat screwdriver to unfasten it 3 Remove the display PCB 1 Unfasten the hook and release the display PCB assembly 2 Turn over the display PCB assembly and unfasten the 3 hooks to remove the display PCB Step Procedure Points R8037 R11651 R11652 Display PCB ASSY R11653 Hook Display PCB ...

Page 149: ...the display PCB S27 for control PCB 4 Remove the control PCB 1 Lift the shield plate 1 and unfasten the 2 hooks 2 Slide the shield plate 1 and remove it 3 Release the harnesses from the hooks Step Procedure Points R14604 S27 TIMER lamp Signal receiver Operation lamp ON OFF button Forced cooling operation ON OFF button R14677 Hook Shield plate 1 R11655 ...

Page 150: ...reen with sleeve lower 5 Release the 4 hooks Lift up the upper part of the control PCB and remove it 6 The figure shows the control PCB Refer to page 13 for detail S6 swing motor S26 display PCB S32 indoor heat exchanger thermistor S200 fan motor S403 adaptor PCB option Step Procedure Points R11656 R11943 Control PCB Hook Hook S32 S200 S24 S26 R8013 S26 S6 S403 S32 S200 Fuse 250 V 3 15 A ...

Page 151: ...e opened air may be sucked in to generate an over pressure in refrigeration cycle thus resulting in pipe rupture or accidental injury If the drain hose is embedded in the wall disconnect the drain hose beforehand 1 Remove the screws which fix the indoor unit to the installation plate 2 Lift the indoor unit with a wooden base 3 Pull out the drain hose Place a plastic sheet under the drain hose as r...

Page 152: ...quid piping with 2 wrenches 2 Remove the indoor heat exchanger 1 Remove the indoor unit from the installation plate 2 Unfasten the hook of the piping fixture on the back of the indoor unit Step Procedure Points R8018 Gas piping Liquid piping R8019 Auxiliary piping Piping fixture R8038 R8039 ...

Page 153: ...e indoor heat exchanger be sure to wear gloves or wrap it with cloth before proceeding to work or you could be injured by the fins 5 Push and unfasten the hook on the right side and lift up the indoor heat exchanger 6 Pull the indoor heat exchanger to the front side to unfasten the hooks completely and then remove it Step Procedure Points Auxiliary piping R8041 R11269 Hook Hook Screw Hook R8042 R8...

Page 154: ...ter turning off all power supplies before disassembling work Step Procedure Points 1 Remove the right side panel Preparation Remove the indoor heat exchanger according to the Removal of Indoor Heat Exchanger 1 Remove the screw of the right side panel 2 Unfasten the hook of the right side panel 3 Remove the right side panel Right side panel R8044 Hook ...

Page 155: ...n rotor and the fan motor 1 The fan motor has 3 projections on the right side The fan rotor has a rotating shaft on the left side 2 Remove the fan rotor 3 Press the bearing from outside 4 Remove the bearing Step Procedure Points Fan rotor Fan motor R8047 R8048 Bearing R8049 ...

Page 156: ...ll out the fan motor from the fan rotor to remove The magnet of the fan motor is united with the fan rotor Be careful not to attract metal waste to the magnet Keep away from the materials that can be affected by magnetic force also Step Procedure Points R8051 Hook Motor cover Magnet Coil Fan motor R8052 ...

Page 157: ...ted at the left side with pliers and insert the removed drain plug into the right side with a hexagonal wrench 1 8 4 mm 3 Insert the drain hose to the left side and tighten it with the heat insulation fixing screw Caution Do not thrust in the drain plug with a sharp pointed tool like a screwdriver The drain plug may be broken resulting in water leakage After removing the drain hose to prevent wate...

Page 158: ...he signal reception When the ON OFF button is kept pressed for 5 seconds the forced cooling operation is performed for about 15 minutes 1 Remove the air filters 1 Open the front panel to the position where it stops 2 3 Slightly push up the center knob of the air filter and unfasten the hooks Pull out the air filter downward and remove it The air filter is not marked for difference between the righ...

Page 159: ...purifying filters 1 Push up the bottom of the Titanium apatite photocatalytic air purifying filter to unfasten the hooks 2 on lower 3 on upper and take the filter out The right and left filters are interchangeable Step Procedure Points Hook Hook R2751 Titanium apatite photocatalytic air purifying filter R2752 ...

Page 160: ...the front panel further than it stops release both the shafts and remove the front panel Slide the front panel from side to side to release each shaft When reassembling the front panel fit the right and left rotary shafts one by one into the grooves and fully push them in position Step Procedure Points ...

Page 161: ...ocedure Points 1 Remove the service cover Preparation Remove the front panel according to Removal of the Air Filters Front Panel You can remove the front grille without detaching the service cover 1 Remove the screw and remove the service cover 2 Remove the front grille 1 Remove the 3 screws of the front grille Refer to the removal procedure in a reverse way when reassembling Service cover R2756 R...

Page 162: ...front grille The convex marks on the front panel indicate the position of the hooks 3 Pull the upper part of the front grille out and lift the lower part up and then remove the front grille Make sure that all the 3 hooks are engaged securely when reassembling Step Procedure Points Hook R2759 Hook R2760 ...

Page 163: ...tal blades 2 Bend the horizontal blade slightly and release the center shaft 2 locations Remove both the horizontal blades upper and lower in the same way 3 Release the left shaft 4 Slide the horizontal blade to the left and release the right shaft Installation procedure 1 Since the key pattern hook is provided rotate the blade and fit it to the right shaft first 2 Fit the blade to the center and ...

Page 164: ...an guards beforehand The unit has 3 sets of vertical blades linked one another with interlock rods 1 Release the right and left shafts 2 Unfasten the 3 hooks for each set of vertical blades 3 Pull the vertical blades rightward and remove them Step Procedure Points Vertical blade R6705 Hook R2768 R6706 ...

Page 165: ... Remove the electrical box Preparation Remove the front grille according to the Removal of Front Grille 1 Remove the screw and remove the drip proof plate 2 Cut the clamp 3 4 5 Pull out the indoor heat exchanger thermistor Remove the screw of the ground Remove the screws of the connection wires Be careful not to lose the clip for the thermistor Drip proof plate R2771 R14685 Indoor heat exchanger t...

Page 166: ...emove the electrical box without detaching the terminal board Screw M4 30 7 Disconnect the connector for the fan motor S1 8 Disconnect the connector for the swing motor S6 S6 for horizontal blades 9 Remove the screw of the electrical box Step Procedure Points Terminal board R2773 S1 R2774 R14254 S6 Electrical box R3205 ...

Page 167: ...ctrical box has a hook on its back 11 Pull the electrical box out Catch the back hook of the electrical box when reassembling 2 Remove the PCBs 1 Remove the screw on the electrical box Screw M4 16 2 Pull the shield plate and release the hook The shield plate also has 2 hooks on the upper side Step Procedure Points Shield plate Hook R13224 ...

Page 168: ...asten the hooks on the lower side 4 Cut the clamp 5 The signal receiver unit has 3 PCBs Unfasten the hooks and remove each PCB Disconnect every connector from each PCB Remove the signal receiver unit while pushing the hooks of connectors 6 Cut the clamp Step Procedure Points Signal receiver unit R14255 Signal receiver PCB Buzzer PCB Display PCB R14256 ...

Page 169: ...DC fan motor S6 swing motor for horizontal blades S26 buzzer PCB S28 signal receiver PCB S32 indoor heat exchanger thermistor Refer to page 15 for detail 3 Remove the swing motor for horizontal blades 1 Remove the screw of the swing motor 2 Remove the swing motor Step Procedure Points Upper hook Lower hook Control PCB R2785 S1 S6 S26 S28 S32 R14257 Swing motor R2788 ...

Page 170: ...onnecting the refrigerant pipe If the refrigerant pipe is disconnected with the compressor operating and the stop valve open air may be sucked in and may generate an over pressure in refrigeration cycle thus resulting in pipe rupture or accidental injury Place a plastic sheet under the drain pan to prevent from wetting the floor with remaining drain If the drain hose is embedded in the wall discon...

Page 171: ... the indoor unit from the installation plate 3 Remove the indoor heat exchanger 1 Unfasten the hook of the piping fixture at the back of the indoor unit and pull out the piping 2 Widen the auxiliary piping to the extent of 10 20 Step Procedure Points Piping fixture R2798 Auxiliary piping R2799 ...

Page 172: ... exchanger be sure to wear protective gloves or wrap the indoor heat exchanger with cloths or you may be injured by the fins 4 Push the hooks on the right side and unfasten them 5 Pull the indoor heat exchanger to the front side and unfasten the hooks completely and then lift it Step Procedure Points Hook R13231 Hook R13232 Indoor heat exchanger R2802 ...

Page 173: ... disassembling work Step Procedure Points 1 Remove the right side plate 1 Remove the 2 screws You can remove the fan rotor without detaching the right side plate 2 Lift the right side plate and remove it 2 Remove the fan motor and rotor 1 Remove the screw and remove the fan motor fixing plate 2 Remove the screw of the fan rotor Right side plate R2803 Fan motor fixing plate R2805 Fan rotor R2806 ...

Page 174: ...stops Then give the screw one more turn 3 Rotate the fan rotor and confirm the fan motor and the fan rotor are installed appropriately 4 Tighten the screw completely if appropriate 5 If not appropriate go back to 1 4 Remove the fan rotor 5 Remove the 2 screws and remove the left side plate 6 The bearing is made of rubber Push it inward and remove it Step Procedure Points Fan motor R12897 5 mm 0 2 ...

Page 175: ...it for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Appearance features Take care not to cut your finger by the fins of the outdoor heat exchanger 2 Remove the panels When reassembling make sure to fit the 3 hooks 1 Remove the screw of the stop valve cover Pull down the stop valve cover and remove it R11741 R14687 R14688 Stop valve cover...

Page 176: ...3 screws right 1 screw left 2 screws and remove the top panel 3 Remove the 5 screws of the front panel 4 Lift up the left side and unfasten the hooks 5 Release the right side hooks and remove the front panel Step Procedure Points R11745 Top panel Front panel R11746 R11747 ...

Page 177: ...7 Remove the 4 screws of the discharge grille Unfasten the 6 hooks and remove the discharge grille 3 Remove the shield plate and the conduit 1 Remove the 2 screws 2 Remove the shield plate Step Procedure Points R11748 Discharge grille R11749 R11750 Shield plate ...

Page 178: ...oor Unit 09 12 Class SiUS041111 170 Removal Procedure 3 Remove the 2 screws 4 Remove the conduit 5 Remove the conduit mounting plate Step Procedure Points R11751 Conduit R11752 Conduit mounting plate R11753 ...

Page 179: ...he outdoor fan Preparation Remove the panels according to the Removal of Outer Panels Nut size M6 1 2 Remove the nut of the outdoor fan Remove the outdoor fan When reassembling align mark of the outdoor fan with D cut section of the motor shaft 2 Remove the fan motor 1 Disconnect the connector for the fan motor S70 2 Release the fan motor lead wire from the hooks R14690 Shaft D cut Nut Outdoor fan...

Page 180: ...reassembling put the fan motor lead wire through the back of the fan motor so as not to be entangled with the outdoor fan 4 Release the fan motor lead wire from the hooks 5 Remove the 3 screws and remove the fan motor Step Procedure Points R11945 Fan motor fixing frame R3249 Lead wire Outdoor fan R14724 R14691 Fan motor ...

Page 181: ... all power supplies before disassembling work Step Procedure Points 1 Remove the right side panel Preparation Remove the panels according to the Removal of Outer Panels 1 Release the outdoor temperature thermistor from the outdoor heat exchanger 2 Remove the screw on the rear side of the right side panel R14693 Outdoor temperature thermistor Right side panel R14692 ...

Page 182: ...edure 3 Remove the 4 screws on the right side panel 4 Unfasten the hook on the rear side When reassembling make sure to fit the hook 5 Unfasten the hook and remove the right side panel Step Procedure Points R11762 Hook R11763 R11764 Right side panel Hook ...

Page 183: ...e thermistor up to the dent of fixture 1 Release the discharge pipe thermistor 2 Release the outdoor heat exchanger thermistor 3 Lift the hook with a flat screwdriver and remove the electronic components mounting plate Step Procedure Points Discharge pipe thermistor R11765 Dent Fixture R11740 R11766 Outdoor heat exchanger thermistor Electronic components mounting plate R11767 ...

Page 184: ...ut the clamp 5 Release the harnesses 6 Disconnect the connector for the thermistors S90 S90 outdoor temperature thermistor outdoor heat exchanger thermistor discharge pipe thermistor 7 Remove the thermistor assembly Step Procedure Points R11768 R11769 S90 R11770 ...

Page 185: ...1 Disconnect the connector for the overload protector S40 2 Disconnect the connector for the four way valve coil S80 The cooling only model has no harness for S80 3 Disconnect the connector for the electronic expansion valve coil S20 Step Procedure Points S40 R11771 S80 R11772 S20 R11773 ...

Page 186: ...y connector for the compressor motor 5 Release the harnesses from the hook 6 Unfasten the hook of the electrical box from the partition plate with a flat screwdriver The electrical box can be removed by lifting itself without a screwdriver Step Procedure Points R11774 R11775 R7318 ...

Page 187: ...d remove the electrical box 4 Remove the control PCB 1 Disconnect the 2 terminals of the reactor 2 Remove the screw of the terminal board and pull out the terminals Step Procedure Points R11776 Electrical box Reactor Brown White Control PCB R11946 Terminal board R11779 ...

Page 188: ...lass SiUS041111 180 Removal Procedure 3 Cut the clamp 4 Remove the 3 screws and remove the reactor 5 Disconnect the 3 connectors for the filter PCB S10 HN3 HL3 Step Procedure Points R11780 Reactor R11777 S10 HN3 HL3 R11781 ...

Page 189: ...111 Outdoor Unit 09 12 Class Removal Procedure 181 6 Release the harnesses 7 Remove the 6 screws 8 Unfasten the 2 hooks 9 Lift and remove the control PCB Step Procedure Points R11782 Control PCB R10717 R11783 ...

Page 190: ...3 HL3 filter PCB S20 electronic expansion valve coil S40 overload protector S70 fan motor S80 four way valve coil S90 thermistors 5 Remove the filter PCB 1 Remove the screw of the ground 2 Cut the clamp Step Procedure Points S70 S10 S90 S40 S20 S80 HL3 HN3 R11784 Ground R11785 Filter PCB R11786 ...

Page 191: ...SiUS041111 Outdoor Unit 09 12 Class Removal Procedure 183 3 Release the harnesses from the hook 4 Remove the screw Step Procedure Points R11787 R11788 ...

Page 192: ...Outdoor Unit 09 12 Class SiUS041111 184 Removal Procedure 5 Unfasten the 2 hooks 6 Release the harnesses 7 Remove the filter PCB Step Procedure Points R11789 R11790 R11791 Filter PCB ...

Page 193: ... or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the partition plate 1 Remove the 2 screws 2 The partition plate has a hook on the lower side Lift and pull the partition plate and remove it When reassembling fit the lower hook into the bottom frame R11792 Hook R11793 Partition plate ...

Page 194: ...e blanket carefully 1 Lift and remove the sound blanket top 2 Pull the sound blanket outer and inner 2 out 3 Pull the sound blanket inner 1 out Since the piping ports on the sound blanket are torn easily remove the blanket carefully Step Procedure Points Sound blanket top R11794 R11795 Sound blanket outer Sound blanket inner 2 Sound blanket inner 1 R11796 ...

Page 195: ...es before disassembling work Step Procedure Points 1 Remove the peripheries The cooling only model has no four way valve coil 1 Remove the screw and remove the four way valve coil 2 Remove the terminal cover 3 Disconnect the terminals of the compressor 4 Remove the overload protector R11799 Four way valve coil R11797 Terminal cover R14529 U red V yellow W blue Overload protector ...

Page 196: ...Outdoor Unit 09 12 Class SiUS041111 188 Removal Procedure 5 Remove the electronic expansion valve coil 6 Remove the putty Step Procedure Points R11798 Electronic expansion valve coil R11800 ...

Page 197: ...e four way valve and the deterioration of the gaskets affected by heat Keep below 120 C 248 F by wrapping the four way valve with a wet cloth and provide water so that the cloth does not dry In case of difficulty with gas brazing machine 1 Disconnect the brazed part where is easy to disconnect and restore 2 Cut pipes on the main unit with a tube cutter in order to make it easy to disconnect 2 Remo...

Page 198: ...l inside the four way valve and the deterioration of the gaskets affected by heat Keep below 120 C 248 F by wrapping the four way valve with a wet cloth and provide water so that the cloth does not dry In case of difficulty with gas brazing machine 1 Disconnect the brazed part where is easy to disconnect and restore 2 Cut pipes on the main unit with a tube cutter in order to make it easy to discon...

Page 199: ... more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the 3 screws and lift the top panel Take care not to cut your finger by the fins of the outdoor heat exchanger 2 Remove the 4 screws and remove the discharge grille Slide the discharge grille upwards and remove it The discharge grille has 2 hooks 3 Remove the 7 screws of the front panel Top panel R1...

Page 200: ...cedure 4 Unfasten the right side hooks 5 Unfasten the left side hooks Remove the front panel When reassembling fit the left side of the front panel first 6 Remove the screw of the stop valve cover Step Procedure Points R14284 R14285 Stop valve cover R14286 ...

Page 201: ...SiUS041111 Outdoor Unit 15 18 24 Class Removal Procedure 193 7 Pull down the stop valve cover to unfasten the hooks and remove it The stop valve cover has 5 hooks Step Procedure Points R14704 R14705 ...

Page 202: ... off all power supplies before disassembling work Step Procedure Points 1 Remove the shield plate Preparation Remove the top panel and the front panel according to the Removal of Outer Panels This procedure is not necessary to remove the outdoor fan only 2 Peel off the filament tape 3 Disconnect the connector for the fan motor S70 R14287 Shield plate R14288 R14289 S70 ...

Page 203: ... groove and the 2 hooks of the partition plate The harnesses of S70 and S20 cross each other 5 Remove the nut of the outdoor fan Nut size M6 When reassembling align mark of the outdoor fan with D cut section of the motor shaft Step Procedure Points R14304 R14448 S20 R14291 Outdoor fan 10 mm R12236 R14292 ...

Page 204: ...oval Procedure 6 Remove the screw of the fan motor fixing frame 7 Pull down the fan motor fixing frame to unfasten the 2 hooks at the bottom 8 Remove the fan motor fixing frame Step Procedure Points R14293 Fan motor fixing frame R14294 Hook R14295 ...

Page 205: ...41111 Outdoor Unit 15 18 24 Class Removal Procedure 197 9 Open the hook and release the fan motor lead wire 10 Remove the 4 screws and remove the fan motor Step Procedure Points R14296 Hook Fan motor R14297 ...

Page 206: ... work Step Procedure Points 1 Remove the 2 screws of the protection plate When reassembling pass the connecting wires through the conduit and secure them with a lock nut 2 Remove the protection plate 3 Remove the 2 screws of the conduit mounting plate 4 Remove the conduit mounting plate R14706 Protection plate 12 3 Lock nut Conduit mounting plate Conduit R14734 R14707 R14708 Conduit mounting plate...

Page 207: ...Procedure 199 5 Remove the screws and remove the connecting wires 6 Pull out the outdoor temperature thermistor 7 Remove the 6 screws of the right side panel Step Procedure Points R14299 R14300 Outdoor temperature thermistor Right side panel R14301 ...

Page 208: ...oks and the 1 upper hook Remove the right side panel When reassembling insert the 2 lower hooks and the 1 upper hook of the back 9 Cut the clamp 10 Pull out the outdoor heat exchanger thermistor Step Procedure Points Hook R14303 R14736 Hook R14375 R14376 Outdoor heat exchanger thermistor ...

Page 209: ...ocedure 201 11 Peel off the filament tape 12 Disconnect the connector for the fan motor S70 13 Disconnect the connector for the four way valve coil S80 The cooling only models have no harness for S80 Step Procedure Points R14288 R14289 S70 R14308 S80 ...

Page 210: ...41111 202 Removal Procedure 14 Pull out the clamp 15 Disconnect the connector for the electronic expansion valve coil S20 16 Pull out the clamp 17 Remove the wire saddle Step Procedure Points R14309 R14305 S20 R14306 Wire saddle R14307 ...

Page 211: ...ect the connectors in the following order 1 S40 2 S20 3 S80 4 S70 19 Pull out the clamp The compressor harness has a clamp When reassembling insert the clamp as below 20 Disconnect the relay connector for the compressor 21 Release the harness of the relay connector from the wire saddle Step Procedure Points R14310 S40 S40 S80 S20 R14363 R14311 R14725 Compressor harness red blue yellow R14312 R1431...

Page 212: ...Procedure 22 Disconnect the connector for the thermistors S90 23 Pull out the clamp When reassembling insert the clamp as below 24 Remove the wire saddle 25 Pull out the clamp Step Procedure Points R14314 S90 R14315 S90 R14726 R14316 Wire saddle R14317 ...

Page 213: ...re 205 26 Remove the screw 27 Pull out the 2 clamps at the bottom of the electrical box When reassembling insert the 2 clamps of the thermistor assembly into the holes as below 28 Remove the electrical box Step Procedure Points R14318 R14320 R14727 R14321 ...

Page 214: ...g off all power supplies before disassembling work Step Procedure Points 1 Remove the main PCB S12 for HL4 HN4 on filter PCB 1 Disconnect the connector S12 and pull out the clamp 2 Disconnect the connector S10 S10 for S11 on filter PCB 3 Disconnect the connectors HN3 HL3 HL3 HN3 for HL2 HN2 on filter PCB R14322 S12 Main PCB R14323 S10 HN3 HL3 R14324 ...

Page 215: ...15 18 24 Class Removal Procedure 207 4 Pull out the clamp When reassembling insert the clamp as below 5 Remove the 2 upper screws 6 Remove the 1 lower screw Step Procedure Points R14325 HL2 blue HN2 white R14728 R14326 R14327 ...

Page 216: ...oor Unit 15 18 24 Class SiUS041111 208 Removal Procedure 7 Lift the main PCB assembly 8 Unfasten the 4 hooks at the bottom 9 Remove the 8 screws Step Procedure Points R14328 Main PCB Assembly R14329 R14330 ...

Page 217: ... PCB S20 electronic expansion valve coil S40 overload protector S70 fan motor S80 four way valve coil S90 thermistors HL3 HN3 filter PCB 2 Remove the radiation fin 1 Remove the 2 screws on the bottom of the electrical box 2 Remove the radiation fin Step Procedure Points R14331 R14332 S80 S12 HN3 HL3 S70 S20 S40 S90 S10 R14333 Electrical box R14334 Radiation fin ...

Page 218: ...e 3 Remove the filter PCB 1 Remove the ground screw 2 Pull out the terminals from the terminal board 1 black 2 white 3 red 3 Pull out the clamp 4 Release the harnesses from the groove Step Procedure Points R14735 Ground Terminal board R14336 1 2 3 R14337 R14364 ...

Page 219: ...iUS041111 Outdoor Unit 15 18 24 Class Removal Procedure 211 5 Remove the 2 screws 6 Unfasten the 3 hooks of the filter PCB assembly 7 Remove the 1 screw Step Procedure Points R14365 R14366 R14367 R14368 ...

Page 220: ...Outdoor Unit 15 18 24 Class SiUS041111 212 Removal Procedure 8 Unfasten the 2 hooks 9 Remove the filter PCB Refer to page 19 for detail Step Procedure Points R14369 R14370 ...

Page 221: ...it for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the partition plate 1 Remove the 2 screws 2 Pull out the clamp from the partition plate 3 Remove the partition plate When reassembling insert the hook of bottom R14371 Partition plate R14372 R14373 R14374 ...

Page 222: ...sound blanket carefully Be careful not to lose the clip for the thermistor 1 Release the discharge pipe temperature thermistor 2 Remove the sound blanket top upper 3 Remove the sound blanket top lower Step Procedure Points R14338 Discharge pipe temperature thermistor R12287 Clip R14339 Sound blanket top upper R14346 Sound blanket top lower ...

Page 223: ... Outdoor Unit 15 18 24 Class Removal Procedure 215 4 Remove the sound blanket side outer 5 Remove the sound blanket side inner Step Procedure Points R14347 Sound blanket side outer R14348 Sound blanket side inner ...

Page 224: ...er so that the cloth does not dry Keep below 120 C 248 F Warning Be careful not to burn yourself burnt with pipes and other parts that are heated by the gas brazing machine Warning If the refrigerant gas leaks during work ventilate the room If the refrigerant gas is exposed to flames toxic gas may be generated Caution For global environment protection do not discharge the refrigerant gas in the at...

Page 225: ...tmosphere Make sure to collect all the refrigerant gas Cautions for restoration 1 Restore the piping by non oxidation brazing 2 It is required to prevent the carbonization of the oil inside the four way valve and the deterioration of the gaskets affected by heat Keep temperature below 120 C 248 F Wrap the four way valve with wet cloth and provide water so that the cloth does not dry Note Do not us...

Page 226: ...it for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the terminal cover 2 Disconnect the compressor lead wires and the overload protector 3 Remove the protection bushing R14343 Terminal cover R14344 R14377 Red U Blue W Yellow V R14345 Protection bushing ...

Page 227: ...a steel plate so that the brazing flame cannot influence peripheries Be careful not to burn the compressor terminals the name plate or the heat exchanger fin Before working make sure that the refrigerant gas is empty in the circuit Be sure to apply nitrogen replacement when heating up the brazed part 5 Heat up the brazed part of the discharge side and disconnect 6 Heat up the brazed part of the su...

Page 228: ...ng Operation 222 3 Trial Operation 223 4 Field Settings 224 4 1 Model Type Setting 224 4 2 Temperature Display Switch 224 4 3 When 2 Units are Installed in 1 Room 225 4 4 Facility Setting Switch cooling at low outdoor temperature 226 4 5 Jumper Settings 227 5 Application of Silicon Grease to a Power Transistor and a Diode Bridge 228 ...

Page 229: ... Detail 1 Remove the valve caps from 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 the forced cooling operation Refer to page 222 for forced cooling operation Gas stop valve Valve cap Close Liquid stop valve Service port R13628 Hex...

Page 230: ...eration ON OFF button SW1 on the indoor unit for 5 seconds 2 Press the forced cooling operation ON OFF switch SW1 on the outdoor unit 15 18 24 class only Command frequency 58 Hz 09 12 class 30 Hz 15 18 24 class End The forced cooling operation ends when any of the following conditions is fulfilled 1 The operation ends automatically after 15 minutes 2 Press the forced cooling operation ON OFF butto...

Page 231: ... restarts operation with the previous mode when the circuit breaker is restored In cooling mode select the lowest programmable temperature in heating mode select the highest programmable temperature Trial operation may be disabled in either mode depending on the room temperature After trial operation is complete set the temperature to a normal level 26 28 C 78 8 82 4 F in cooling mode 20 24 C 68 7...

Page 232: ...to set the heat pump model or cooling only model Make the setting as shown in the illustration The factory set is the heat pump side Heat pump model Set the DIP switch to H P Cooling only model Set the DIP switch to C O 4 2 Temperature Display Switch You can select Fahrenheit or Celsius for temperature display Press the TEMP and buttons simultaneously for 5 seconds to change the unit of temperatur...

Page 233: ...remote controller can be set for different addresses Both the indoor unit PCB and the wireless remote controller need alteration Indoor Unit PCB Cut the address setting jumper JA on the control PCB Wireless Remote Controller Cut the address setting jumper 09 12 class 15 18 24 class JA R12008 JA EXIST CUT ADDRESS 1 2 Address JA R14261 JA EXIST CUT Address 1 2 R13525 ADDRESS Jumper EXIST CUT 1 2 ...

Page 234: ... to maintain the pressure difference When the pressure difference returns to high again the fan starts to rotate again 09 12 class 15 18 24 class Caution 1 If the outdoor unit is installed where the outdoor heat exchanger of the unit is exposed to direct wind provide a windbreak wall 2 Intermittent noises may be produced by the indoor unit due to the outdoor fan turning on and off when using facil...

Page 235: ...tion When connected factory set When cut JB on indoor unit PCB Fan speed setting when compressor stops for thermostat OFF effective only at cooling operation Fan speed setting Remote controller setting Fan rpm is set to 0 Fan stop JC on indoor unit PCB Power failure recovery function Auto restart The unit does not resume operation after recovering from a power failure Timer ON OFF settings are cle...

Page 236: ...n of the power transistor and the diode bridge Applying the paste should be implemented in accordance with the following instruction NOTE There is the possibility of failure with smoke in case of bad heat radiation Wipe off the old silicon grease completely on a radiation fin Apply the silicon grease evenly to the whole Do not leave any foreign object such as solder or paper waste between the powe...

Page 237: ...SiUS041111 Appendix 229 Part 9 Appendix 1 Piping Diagrams 230 1 1 Indoor unit 230 1 2 Outdoor Unit 231 2 Wiring Diagrams 233 2 1 Indoor Unit 233 2 2 Outdoor Unit 234 ...

Page 238: ...16CuT 9 32CuT 9 32CuT 9 32CuT CROSS FLOW FAN FIELD PIPING 1 4CuT M FAN MOTOR 3 8CuT FIELD PIPING 3 8CuT REFRIGERANT FLOW COOLING HEATING THERMISTOR ON HEAT EXCH 4D066211A INDOOR UNIT 5 16CuT HEAT EXCHANGER CROSS FLOW FAN FIELD PIPING FIELD PIPING 1 4CuT M FAN MOTOR 1 2CuT 1 2CuT REFRIGERANT FLOW COOLING HEATING THERMISTOR ON HEAT EXCH 4D071084 ...

Page 239: ... 16CuT 16 0 5 8CuT 5 16CuT 12 0 15 32CuT CAPILLARY TUBE 1 5 16CuT 5 16CuT 5 32CuT 8 0 4 0 5 16CuT CAPILLARY TUBE 2 6 0 6 0 REFRIGERANT FLOW 5 16CuT 5 32CuT 5 16CuT 1 4CuT 1 4CuT COOLING 8 0 4 0 CAPILLARY TUBE 3 5 16CuT 5 32CuT 8 0 4 0 M 6 0 PROPELLER FAN 1 4CuT 12 0 12 0 15 32CuT 15 32CuT 12 0 12 0 15 32CuT 15 32CuT 6 0 1 4CuT 12 0 15 32CuT FIELD PIPING MUFFLER 8 0 1 4 CuT 1 4CuT 5 16CuT 6 0 6 4 M...

Page 240: ...HEAT EXCHANGER 5 16CuT 5 16CuT 16 0 5 8CuT 5 16CuT 12 0 15 32CuT CAPILLARY TUBE 1 5 16CuT 5 32CuT 5 16CuT 4 0 8 0 5 16CuT CAPILLARY TUBE 2 6 0 6 0 REFRIGERANT FLOW 5 32CuT 5 16CuT 5 16CuT 1 4CuT 1 4CuT COOLING 4 0 8 0 CAPILLARY TUBE 3 5 32CuT 5 16CuT HEATING 4 0 8 0 M 6 0 PROPELLER FAN 1 4CuT 12 0 12 0 15 32CuT 15 32CuT 12 0 12 0 15 32CuT 15 32CuT 6 0 1 4CuT 12 0 15 32CuT FIELD PIPING MUFFLER 8 0 ...

Page 241: ... THEN BACK ON AGAIN FRAME GROUND FUSE HARNESS PILOT LAMP FAN MOTOR SWING MOTOR PRINTED CIRCUIT BOARD THERMISTOR CONNECTOR OPERATION SWITCH TERMINAL STRIP PROTECTIVE GROUND C 3D065939B FG F1U H1 H3 H1P H2P M1F M1S PCB1 PCB3 R1T R2T S6 S602 S1W X1M M 2 3 1 X1M OUTDOOR INDOOR LED1 H1P RECTIFIER FIELD WIRING S1W Fu 3 15A LED2 H2P WHT R2T S21 5 1 3 BRN M1F GRN H1 S6 S28 PCB4 S29 S26 ORG M 2 S1 PNK M1S ...

Page 242: ... indoor MRM20 N 5 FU3 Z3C X1M DB1 L804 HL3 HL2 30A HL1 BLU 1 L1 BLK 1 MRM10 HN1 V2 WHT 2 L2 2 HN3 HN2 S C8 C7 WHT RED 3 3 1 V3 BLK 1 BLK FU1 L1 BLK 3 15A BLK L2 BLK PCB2 S11 S10 BLK DC_N1 DC_P1 N 4 GRN YLW BLK SA1 BLK Z2C PPL E1 BLK BRN W V U BLK HL4 HN4 11 11 DC_N2 DC_P2 BLK E2 GRN DB3 FU2 4 Z1C 3 15A YLW PCB1 N 4 S70 S40 S90 S20 V1 3 7 4 1 2 1 6 1 1 2 6 1 GRN BLU RED YLW GRY X11A outdoor MRCW S1...

Page 243: ......

Page 244: ...factured for export to numerous countries throughout the world Daikin Industries Ltd does not have control over which products are exported to and used in a particular country Prior to purchase please therefore confirm with your local authorized importer distributor and or retailer whether this product conforms tot he applicable standards and is suitable for use in the region where the product wil...

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