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Daikin Sky Air B-Series R-410A, Service Manual

The Daikin Sky Air B-Series R-410A is an exceptional cooling system designed for versatility. To ensure you get the most out of this product, we offer a comprehensive Service Manual available for free download on our website. Explore its features and download the manual today from manualshive.com to maximize your experience.

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Si21-205

Outdoor Unit (50/60 class)

Function and Control

103

3.1.2 Cooling Only Model

A   Outdoor Heat 
Exchanger 
Thermistor (DCB)

1. The outdoor heat exchanger thermistor is used for controlling target discharge temperature.

Set a target discharge temperature depending on the outdoor and indoor heat exchanger 
temperature.
Control the electronic expansion valve opening so that the target discharge temperature can 
be obtained. 

2. When cooling: an outdoor heat exchanger thermistor is used for detecting the discharge 

thermistor disconnected.
When the temperature of the discharge piping is lower than the temperature of outdoor heat 
exchanger, a disconnected discharge thermistor can be detected.

3. The outdoor heat exchanger thermistor is used for high pressure protection during cooling 

operation.

B   Discharge 
Pipe Thermistor 
(DOT)

1. The discharge pipe thermistor is used to control the discharge pipe.

If the temperature of discharge pipe (used in place of the inner temperature of the 
compressor) rises abnormally, the operating frequency drops or the operation must be 
halted.

2. The discharge pipe thermistor is used for detecting the discharge thermistor disconnected.

A

B

Compressor

(R3078)

Electrontic
expansion valve

Summary of Contents for Sky Air B-Series R-410A

Page 1: ...SiE21 205 Split System Air Conditioners Sky Air B Series R 410A Service Manual Applied Models SkyAir Heat Pump SkyAir Cooling Only ...

Page 2: ...Type 14 Part 4 Remote Controller 17 1 Wired Remote Controller 18 1 1 Features 18 1 2 Installation 20 2 Wireless Remote Controller 22 2 1 Features 22 Part 5 Field Piping and Wiring 25 1 Field Piping and Wiring 26 1 1 Precautions for New Refrigerant R410A 26 1 2 Refrigerant Piping Drain Piping and Wiring for FFQ Model 35 1 3 Refrigerant Piping Drain Piping and Wiring for FHQ Model 44 Part 6 Field Se...

Page 3: ...t Control 93 2 9 Fan Control 94 2 10 Moisture Protection Function 1 Securing of Differential Pressure and Blown Air Temperature 94 2 11 Moisture Protection Function 2 95 2 12 Defrost Control 96 2 13 Electronic Expansion Valve Control 97 2 14 Malfunctions 100 2 15 Forced Operation Mode 101 2 16 Voltage Detection Function 101 3 Outdoor Unit 50 60 class 102 3 1 Function of Thermistor 102 3 2 Mode Hie...

Page 4: ...oting for Indoor Unit 142 5 1 Failure of Indoor Unit PC Board 142 5 2 Malfunction of Drain Water Level System Float Type 143 5 3 Failure of Drain System 145 5 4 Indoor Unit Fan Motor Lock 146 5 5 Malfunction of Indoor Unit Fan Motor 147 5 6 Swing Flap Motor Malfunction Lock 149 5 7 Failure of Capacity Setting 151 5 8 Malfunction of Heat Exchanger Thermistor R2T 152 5 9 Malfunction of Heat Exchange...

Page 5: ...0 60 class 219 Part 9 Removal Procedure 229 1 FFQ25 35 50 60BV1B 230 1 1 Removal of Suction Grille 230 1 2 Removal of Air Filter 231 1 3 Removal of Decoration Panel 232 1 4 Removal of Horizontal Vane 234 1 5 Removal of Swing Motor 236 1 6 Removal of Switch Box 237 1 7 Removal of Fan Rotor and Fan Motor 238 1 8 Removal of Drain Pan 240 1 9 Removal of Drain Pump 241 1 10 Installation of Drain Pump 2...

Page 6: ...of the Fan Motor Propeller Fan 290 4 3 Removal of the PCB Electrical Box 294 4 4 Removal of the Reactor 302 4 5 Removal of the Sound Blanket 304 4 6 Removal of the Four Way Valve 306 4 7 Removal of the Electronic Expansion Valve 307 4 8 Removal of the Compressor 308 Part 10Appendix 311 1 Piping Diagrams 312 1 1 Indoor Units 312 1 2 Outdoor Units 25 35 class 313 1 3 Outdoor Units 50 60 class 315 2 ...

Page 7: ...Si21 205 vi Table of Contents ...

Page 8: ...plug socket before disassembling the equipment for a repair Working on the equipment that is connected to a power supply can cause an electrical shook If it is necessary to supply power to the equipment to conduct the repair or inspecting the circuits do not touch any electrically charged sections of the equipment If the refrigerant gas discharges during the repair work do not touch the dischargin...

Page 9: ...the applicable model and appropriate tools to conduct repair work Never attempt to modify the equipment The use of inappropriate parts or tools can cause an electrical shock excessive heat generation or fire When relocating the equipment make sure that the new installation site has sufficient strength to withstand the weight of the equipment If the installation site does not have sufficient streng...

Page 10: ...ce valve to prevent the refrigerant gas from leaking into the room The refrigerant gas itself is harmless but it can generate toxic gases when it contacts flames such as fan and other heaters stoves and ranges When replacing the coin battery in the remote controller be sure to disposed of the old battery to prevent children from swallowing it If a child swallows the coin battery see a doctor immed...

Page 11: ... shock Be sure to measure the insulation resistance after the repair and make sure that the resistance is 1 Mohm or higher Faulty insulation can cause an electrical shock Be sure to check the drainage of the indoor unit after the repair Faulty drainage can cause the water to enter the room and wet the furniture and floor Icon Type of Information Description Note Note A note provides information th...

Page 12: ...Si21 205 Model Name and Power Supply 1 Part 1 Model Name and Power Supply 1 Models 2 1 1 Model Name and Power Supply 2 1 2 External Appearance 3 ...

Page 13: ...B RXS35BVMB FFQ35BV1B RKS35BVMB FFQ50BV1B RXS50BVMB FFQ50BV1B RKS50BVMB FFQ50BV1B RS50BVMB FFQ50BV1B RXS50BVMA 1φ 240V 50Hz FFQ50BV1B RKS50BVMA FFQ60BV1B RXS60BVMB 1φ 230V 50Hz FFQ60BV1B RKS60BVMB FFQ60BV1B RS60BVMB FFQ60BV1B RXS60BVMA 1φ 240V 50Hz FFQ60BV1B RKS60BVMA Ceiling Suspended Type FHQ35BUV1B RXS35BVMB 1φ 230V 50Hz FHQ35BUV1B RKS35BVMB FHQ50BUV1B RXS50BVMB FHQ50BUV1B RKS50BVMB FHQ50BUV1B ...

Page 14: ...Si21 205 Models Model Name and Power Supply 3 1 2 External Appearance Indoor Units Remote Controller Outdoor Units FFQ B FHQ BU Wireless Type Wired Type 25 35 Class 50 60 Class ...

Page 15: ...Models Si21 205 4 Model Name and Power Supply ...

Page 16: ...Si21 205 Functions 5 Part 2 Functions 1 List of Functions 6 ...

Page 17: ... Remote Controller Option Auto Swing Function Ceiling Soiling Prevention Program Dry High Fan Speed Mode High Ceiling Application Two Select Thermostat Sensor Wired Type Wireless Type Hot Start Timer Selector For Easy Construction and Maintenance Fresh Air Intake Directly from the Unit Drain Pump Option Long Life Filter Ultra Long Life Filter Option Mold Resistant Treatment For Filter Filter Sign ...

Page 18: ...Si21 205 Specifications 7 Part 3 Specifications 1 Specifications 8 1 1 Ceiling Mounted Cassette Type 8 1 2 Ceiling Suspended Type 14 ...

Page 19: ...52A23 D16P52A23 Type Turbo Fan Turbo Fan Motor Output W 55 55 Air Flow Rate m min H 9 0 L 6 5 H 9 0 L 6 5 Machine Weight kg 17 5 17 5 Remote Controller Option Wired BRC1C517 BRC1C517 Wireless BRC7E530W BRC7E531W Decoration Panel Option Model BYFQ60BW1 BYFQ60BW1 Color White White Dimensions H W D mm 55 700 700 55 700 700 Air Filter Removable Washable Mildew Proof Long Life Weight kg 2 7 2 7 Outdoor...

Page 20: ...bo Fan Turbo Fan Motor Output W 55 55 Air Flow Rate m min H 10 L 6 5 H 10 L 6 5 Machine Weight kg 17 5 17 5 Remote Controller Option Wired BRC1C517 BRC1C517 Wireless BRC7E530W BRC7E531W Decoration Panel Option Model BYFQ60BW1 BYFQ60BW1 Color White White Dimensions H W D mm 55 700 700 55 700 700 Air Filter Removable Washable Mildew Proof Long Life Weight kg 2 7 2 7 Outdoor Units RXS35BVMB RKS35BVMB...

Page 21: ...e m min H 12 L 8 H 12 L 8 H 12 L 8 Machine Weight kg 17 5 17 5 17 5 Remote Controller Option Wired BRC1C517 BRC1C517 BRC1C517 Wireless BRC7E530W BRC7E531W BRC7E531W Decoration Panel Option Model BYFQ60BW1 BYFQ60BW1 BYFQ60BW1 Color White White White Dimensions H W D mm 55 700 700 55 700 700 55 700 700 Air Filter Removable Washable Mildew Proof Long Life Weight kg 2 7 2 7 2 7 Outdoor Units RXS50BVMB...

Page 22: ...bo Fan Turbo Fan Motor Output W 55 55 Air Flow Rate m min H 13 L 8 H 13 L 8 Machine Weight kg 17 5 17 5 Remote Controller Option Wired BRC1C61 BRC1C61 Wireless BRC7E530W BRC7E531W Decoration Panel Option Model BYFQ60BW1 BYFQ60BW1 Color White White Dimensions H W D mm 55 700 700 55 700 700 Air Filter Removable Washable Mildew Proof Long Life Weight kg 2 7 2 7 Outdoor Units RXS50BVMA RKS50BVMA Color...

Page 23: ...m min H 15 L 10 H 15 L 10 H 15 L 10 Machine Weight kg 17 5 17 5 17 5 Remote Controller Option Wired BRC1C517 BRC1C517 BRC1C517 Wireless BRC7E530W BRC7E531W BRC7E531W Decoration Panel Option Model BYFQ60BW1 BYFQ60BW1 BYFQ60BW1 Color White White White Dimensions H W D mm 55 700 700 55 700 700 55 700 700 Air Filter Removable Washable Mildew Proof Long Life Weight kg 2 7 2 7 2 7 Outdoor Units RXS60BVM...

Page 24: ...Fan Turbo Fan Motor Output W 55 55 Air Flow Rate m min H 15 5 L 11 H 15 5 L 11 Machine Weight kg 17 5 17 5 Remote Controller Option Wired BRC1C61 BRC1C61 Wireless BRC7E530W BRC7E531W Decoration Panel Option Model BYFQ60BW1 BYFQ60BW1 Color White White Dimensions H W D mm 55 700 700 55 700 700 Air Filter Removable Washable Mildew Proof Long Life Weight kg 2 7 2 7 Outdoor Units RXS60BVMA RKS60BVMA Co...

Page 25: ...i Louver Fins and Hi XSS Tubes Row Stages Fin Pitch 2 12 1 75 2 12 1 75 Fan Model D09P62A 20 D09P62A 20 Type Sirocco Fan Sirocco Fan Motor Output W 62 62 Air Flow Rate m min H 13 L 10 H 13 L 10 Weight kg 24 24 Remote Controller Option Wired BRC1C517 BRC1C517 Wireless BRC7E63W BRC7E66 Outdoor Units RXS35BVMB RKS35BVMB Color Ivory white Ivory white Dimensions H W D mm 560 695 265 560 695 265 Coil Ty...

Page 26: ...Fan Model D09P62A 20 D09P62A 20 D09P62A 20 Type Sirocco Fan Sirocco Fan Sirocco Fan Motor Output W 62 62 62 Air Flow Rate m min H 13 L 10 H 13 L 10 H 13 L 10 Weight kg 25 25 25 Remote Controller Option Wired BRC1C517 BRC1C517 BRC1C517 Wireless BRC7E63W BRC7E66 BRC7E66 Outdoor Units RXS50BVMB RKS50BVMB RS50BVMB Color Ivory white Ivory white Ivory white Dimensions H W D mm 735 825 300 735 825 300 73...

Page 27: ...62A 20 D09P62A 20 D09P62A 20 Type Sirocco Fan Sirocco Fan Sirocco Fan Motor Output W 62 62 62 Air Flow Rate Cooling m min H 17 L 13 H 17 L 13 H 17 L 13 Heating m min H 16 L 13 Weight kg 27 27 27 Remote Controller Option Wired BRC1C517 BRC1C517 BRC1C517 Wireless BRC7E63W BRC7E66 BRC7E66 Outdoor Units RXS60BVMB RKS60BVMB RS60BVMB Color Ivory white Ivory white Ivory white Dimensions H W D mm 735 825 ...

Page 28: ...Si21 205 Remote Controller 17 Part 4 Remote Controller 1 Wired Remote Controller 18 1 1 Features 18 1 2 Installation 20 2 Wireless Remote Controller 22 2 1 Features 22 ...

Page 29: ... Si21 205 18 Remote Controller 1 Wired Remote Controller 1 1 Features BRC1C61 BRC1C517 BRC1C61 BRC1C517 FFQ B FHQ BU TEST C hr hr TEST NOT AVAILABLE L H 2 10 11 3 1 4 5 6 7 8 14 15 16 17 18 19 20 21 22 12 9 13 3PA59583 16Z 1 ...

Page 30: ...0 DISPLAY AIR FLOW FLAP 11 DISPLAY TIME TO CLEAN AIR FIL TER 12 DISPLAY DEFROST 13 NON FUNCTIONING DISPLAY If that particular function is not available press ing the button may display the words NOT AVAILABLE for a few seconds When running multiple units simultaneously The NOT AVAILABLE message will only be appear if none of the indoor units is equipped with the function If even one unit is equipp...

Page 31: ... Part of Remote Controller Lower Part of Remote Controller Insert the minus screwdriver and twist lightly to remove 2 Fasten the remote controller For exposed mounting fasten with the included wood screws 2 For flush mounting fasten with the included machine screws 2 Wood Screws ø3 5 x 16 Switch Box Field supplied parts Machine Screws M4 x 16 For the field supplied switch box use optional accessor...

Page 32: ...oller wiring but it must confirm to EMC Electromagnetic compatibility Australian regulation Wiring Specifications Wiring Type Sheathed vinyl code or cable 2 wire See NOTE 2 Size 0 75 1 25 mm2 First begin fitting from the clips at the bottom 4 Reattach the upper part of remote controller Be careful not to pinch the wiring when attaching 1 The switch box and wiring for connection are not included 2 ...

Page 33: ...ver Name of Option Model Series FFQ B FHQ BU Remote Controller H P BRC7E530W BRC7E63W C O BRC7E531W BRC7E66 1 1 1 2 8 10 13 11 12 15 14 16 17 9 1 3 4 6 2 5 7 DOWN FAN UP ON OFF M H L C hr hr TEST MODE TIMER RESERVE CANCEL DOWN UP TEST SWING FAN TIME TEMP ON OFF M H L C hr hr TEST 3PA63363 21T 1 FFQ B FHQ B 19 21 20 22 23 18 3PA63363 21T 2 ...

Page 34: ...te controller closed 11 PROGRAMMING TIMER BUTTON Use this button for programming START and or STOP time Operates with the front cover of the remote con troller opened 12 TIMER MODE START STOP BUTTON 13 TIMER RESERVE CANCEL BUTTON 14 AIR FLOW DIRECTION ADJUST BUTTON 15 OPERATION MODE SELECTOR BUTTON Press this button to select OPERATION MODE 16 FILTER SIGN RESET BUTTON Refer to the section of MAINT...

Page 35: ...Wireless Remote Controller Si21 205 24 Remote Controller ...

Page 36: ...25 Part 5 Field Piping and Wiring 1 Field Piping and Wiring 26 1 1 Precautions for New Refrigerant R410A 26 1 2 Refrigerant Piping Drain Piping and Wiring for FFQ Model 35 1 3 Refrigerant Piping Drain Piping and Wiring for FHQ Model 44 ...

Page 37: ...mixture refrigerant mixture of two or more refrigerants having similar boiling points 3 The design pressure is different at each product Please refer to the installation manual for each product Reference 1 Mpa 10 19716 kgf cm2 HFC units Units using new refrigerants HCFC units Refrigerant name R407C R410A R22 Composing substances Non azeotropic mixture of HFC32 HFC125 and HFC134a 1 Quasi azeotropic...

Page 38: ... Wiring 27 Thermodynamic characteristic of R410A Temperature C Steam pressure kPa Liquid Vapor Density kg m3 Liquid Vapor Specific heat at constant pressure kJ kgK Liquid Vapor Specific enthalpy kJ kg Liquid Vapor Specific entropy kJ KgK Liquid Vapor ...

Page 39: ...essure vessels Although those vessels are durable and strong careless handling can cause damage that can lead to unexpected accidents Do not drop vessels let them fall apply impact or roll them on the ground 3 Storage Although R410A is not flammable it must be stored in a well ventilated cool and dark place in the same way as any other high pressure gases It should also be noted that high pressure...

Page 40: ...ging cylinder 2Weighting instrument used for HFCs Gas detector 2The same tool can be used for HFCs Vacuum pump pump with reverse flow preventive function 2To use existing pump for HFCs vacuum pump adaptor must be installed Weighting instrument Charge mouthpiece 2Seal material is different between R22 and HFCs 2Thread specification is different between R410A and others Flaring tool Clutch type 2For...

Page 41: ...on margin of 0 to 0 5mm was provided for flaring For R410A air conditioners perform pipe flaring with a pipe extension margin of 1 0 to 1 5mm For clutch type only Conventional tool with pipe extension margin adjustment can be used Flare gauge Nominal size 1 4 3 8 1 2 5 8 3 4 Tube O D Do 6 35 9 52 12 70 15 88 19 05 Class 2 R410A 9 1 13 2 16 6 19 7 24 0 Class 1 Conventional 9 0 13 0 16 2 19 4 23 3 A...

Page 42: ...pecifications 2 Discharge speed Maximum degree of vacuum 50 l min 50Hz 100 7 kPa 5 Torr 755 mmHg 60 l min 60Hz 2 Suction port UNF7 16 20 1 4 Flare UNF1 2 20 5 16 Flare with adapter Differences 2 Equipped with function to prevent reverse oil flow 2 Previous vacuum pump can be used by installing adapter Nominal size Class 1 Class 2 Previous 1 2 24 26 24 5 8 27 29 27 Dimension B For class 1 R407C For...

Page 43: ...rant oil Air compal Specifications 2 Contains synthetic oil therefore it can be used for piping work of every refrigerant cycle 2 Offers high rust resistance and stability over long period of time Differences 2 Can be used for R410A and R22 units 6 Gauge manifold for R410A Specifications 2 High pressure gauge 0 1 to 5 3 MPa 76 cmHg to 53 kg cm2 2 Low pressure gauge 0 1 to 3 8 MPa 76 cmHg to 38 kg ...

Page 44: ...ut hand operate valve that prevents refrigerant from outflow Differences 2 Pressure proof hose 2 Change in service port diameter 2 Use of nylon coated material for HFC resistance 8 Charging cylinder Specifications 2 Use weigher for refrigerant charge listed below to charge directly from refrigerant cylinder Differences 2 The cylinder can not be used for mixed refrigerant since mixing ratio is chan...

Page 45: ...erant charging 2 A manifold with separate ports for HFCs and previous refrigerants is equipped as standard accessories Differences 2 Measurement is based on weight to prevent change of mixing ratio during charging 10 Charge mouthpiece Specifications 2 For R410A 1 4 5 16 2min 2 5min 2 Material is changed from CR to H NBR Differences 2 Change of thread specification on hose connection side For the R...

Page 46: ...t dust moisture or other foreign matter from infiltrating the tube either pinch the end or cover it with tape Do not allow anything other than the designated refrigerant to get mixed into the refrigerant circuit such as air etc If any refrigerant gas leaks while working on the unit ventilate the room thoroughly right away Note Use the flare nut included with the unit main body Table 3 Refer to Tab...

Page 47: ...nstance if the chlorine based flux is used it will cause pipe corrosion or in particular if the flux contains fluorine it will damage the refrigerant oil Before brazing local refrigerant piping nitrogen gas shall be blown through the piping to expel air from the piping If your brazing is done without nitrogen gas blowing a large amount of oxide film develops inside the piping and could cause syste...

Page 48: ... PVC pipe nominal diameter 20 mm outside diameter 26 mm keep the drain pipe short and sloping downwards at a gradient of at least 1 100 to prevent air pockets from forming If the drain hose cannot be sufficiently set on a slope refer to PRECAUTIONS FOR DRAIN RAISING PIPING on page 38 To keep the drain hose from sagging space hanger bracket every 1 to 1 5 m Use the attached drain hose 1 and clamp 2...

Page 49: ... WIRING WORK IS FINISHED Check drainage flow during cooling operation WHEN ELECTRIC WIRING WORK IS NOT FINISHED Remove the control box lid Connect the single phase power supply SINGLE PHASE 50Hz 220 240V to connections No 1 and No 2 on the power supply terminal block Do not connect to No 3 of the power supply terminal block The drain pump will not operate When carrying out wiring work around the c...

Page 50: ...in mind that it will become the cause of getting drain pipe blocked if water collects on drain pipe Drain pipe Service drain outlet with rubber plug Use this outlet to drain water from the drain pan Plastic container for pouring Tube should be about 100 mm long 100 Adding water through air outlet Method of adding water Fig 23 mm 1 2 3 Single phase power supply 50Hz 220 240V No 1 No 2 No 3 Power su...

Page 51: ...emote controller terminal board Also connect the ground for the remote control to a grounded metal part 3 For group control remote controller choose the remote controller that suits the indoor unit which has the most functions as attached swing flap Pair type Multi system Main power supply Main switch 1 2 3 1 P P 2 3 1 P1 2 P2 Fuse Outdoor unit Indoor unit Group control Main power supply Main swit...

Page 52: ...s no grounding effect if hard vinyl piping is used Telepone ground wires or lightning rods might cause abnormally high electric potential in the ground during lighting storms Specifications for field wire Table 4 This will be the total extended length in the system when doing group control Note 1 Shows only in case of protected pipes Use H07RN F in case of no protection 2 For European and Asian ma...

Page 53: ...supply terminal block Ground the shield part of shielded wire Refer to Note 2 in 1 2 3 Wiring Example For FFQ Model Remote controller cord Terminal block for remote controller 6P control box lid Wiring Remote controller cord Wiring between units Wiring diagram label Back side of control box lid Remove the control box lid take off 2 screws Note Outdoor unit Indoor unit Wiring between units How to c...

Page 54: ... 80 mm Refer to Fig 30 In wiring make certain that prescribed wires are used carry out complete connections and fix the wires so that external forces are not applied to the terminals Caution When clamping the wires be sure no pressure is applied to the wire connections by using the included clamping material to make appropriate clamps Also when wiring make sure the lid on the control box fits snug...

Page 55: ...ng other than the designated refrigerant to get mixed into the refrigerant circuit such as air etc If any refrigerant gas leaks while working on the unit ventilate the room thoroughly right away The outdoor unit is charged with refrigerant Use copper alloy seamless pipes ISO 1337 Be sure to use both a spanner and torque wrench together as shown in the drawing when connecting or disconnecting pipes...

Page 56: ...s inside the piping and could cause system malfunction When brazing the refrigerant piping only begin brazing after having carried out nitrogen substitution or while inserting nitrogen into the refrigerant piping Once this is done connect the indoor unit with a flared or a flanged connection Nitrogen should be set to 0 02 Mpa 0 2 kg cm2 with a pressure reducing valve if brazing while inserting nit...

Page 57: ...ng them through the clamp section on the top penetration lid Refer to Fig 14 17 When doing this block any gaps between the piping penetration lid and the pipes using putty to prevent dust from entering the indoor unit Insulation for gas pipe 6 attached Small sealing pad 9 attached Wrap from the bottom up Gas piping Liquid piping Insulation for liquid pipe 7 attached Clamp 4 attached 4 Attach to th...

Page 58: ...l diameter 26 mm Make sure the piping is short has at least a 1 100 slope and can prevent air pockets from forming Refer to Fig 19 Be sure to use the included drain hose 1 and clamp 2 Also insert the drain hose completely into the drain socket and securely attach the clamp bracket inside the gray tape area on the inserted tip of the drain hose Refer to Fig 20 Screw the screws on the clamp bracket ...

Page 59: ...lack in the drain hose can cause the suction grille to break 2 Check to make sure the drain flows smoothly after piping is complete Slowly pour 600 ml of drain checking water into the drain pan through the air outlet Caution Drain piping connections Do not connect the drain piping directly to sewage pipes that smell of ammonia The ammonia in the sewage might enter the indoor unit through the drain...

Page 60: ...P1 P2 P1 P2 1 2 3 1 2 3 1 2 3 Main power supply Main switch Fuse Outdoor unit Indoor unit Master Indoor unit Slave P1 P2 Simultaneous operation system Remote controller Optional accessories 1 2 3 P1 P2 1 2 3 P1 P2 Main power supply Main switch Fuse Outdoor unit Indoor unit Remote controller Optional accessories Pair or Multi system P1 P2 P1 P2 1 2 3 P1 P2 Indoor unit Remote controller 1 Optional a...

Page 61: ...eaks Water pipes no grounding effect if hard vinyl piping is used Telephone ground wires or lightning rods might cause abnormally high electric potential in the ground during lighting storms Specifications for field wire Table 3 Note 1 Shows only in case of protected pipes Use H07RN F in case of no protection Sheath thickness 1mm or more 2 Use double insulated wire for remote controller Sheath thi...

Page 62: ...emote controller cord to the anchor point Refer to Fig 28 Attaching the suction grille and the dressing boards Once wiring is complete firmly attach the dressing side board by reversing the steps taken to remove the suction grille Ground terminal Fig 28 Rear penetration lid Liquid pipe Gas pipe Drain hose Remote controller cord Wiring between units Wiring between units If wiring the slave unit con...

Page 63: ...e reasons be sure to observe the following instructions Refer to Fig 30 Do not connect wires of different gauge to the same power supply terminal Looseness in the connection may cause overheating Refer to Fig 31 When connecting wires of the same gauge connect them according to Refer to Fig 31 In wiring make certain that prescribed wires are used carry out complete connections and fix the wires so ...

Page 64: ...n 54 1 2 Field Setting 55 1 3 Initial Setting Contents 57 1 4 Local Setting Mode No 58 1 5 Detailed Explanation of Setting Modes 60 1 6 Centralized Group No Setting 64 2 Settings Concerning Maintenance 65 2 1 Indoor Unit PCB 65 2 2 Outdoor Unit PCB 25 35 class 67 2 3 Outdoor Unit PCB 50 60 class 69 3 Maintenance Mode Setting 71 ...

Page 65: ...on Field set is carried out from the remote controller At time of installation or after maintenance inspection repair carry out field set according to the explanation below Incorrect settings will cause a malfunction to occur The indoor unit settings are sometimes changed if optional accessories are mounted on the indoor unit Refer to the optional accessory manual ...

Page 66: ...ed Select the desired MODE NO with the button During group control when setting by each indoor unit mode No 20 21 and 23 have been selected push the button and select the INDOOR UNIT NO to be set This operation is unnecessary when setting by group Push the upper button and select FIRST CODE NO Push the lower button and select the SECOND CODE NO Push the button once and the present settings are SET...

Page 67: ...efer to the instruction manual optional hand book for each optional accessory Procedure 1 When in the normal mode push the button for a minimum of four seconds and the FIELD SET MODE is entered 2 Select the desired MODE NO with the button 3 Push the button and select the FIRST CODE NO 4 Push the button and select the SECOND CODE NO 5 Push the button and the present settings are SET 6 Push the butt...

Page 68: ...umulated Operating Hours High Air Outlet Velocity for Application to Ceiling Higher than 2 7m Selection of Air Flow Direction F T W Air Flow Direction Adjust Air Flow Direction Range Setting External Static Pressure Long Life Filter Type Fan Speed Up Simul taneous operation Twin Ceiling Suspended type FHQ Heat Pump FHQ 35 60 BUV1B Ceiling Mounted Cassette type FFQ Heat Pump FFQ 25 60 BV1B ...

Page 69: ...ong Life Type Light Approx 2 500 hours Heavy Approx 1 250 hours 1 Long life filter type Setting of filter sign indication time Change setting when Ultra long life filter is installed Long Life Filter 2 Remote control thermostat Set when remote control thermostat sensor is used Use Not use 3 Estimation of filter operating hour Change setting when filter sign indication is not used ON OFF 11 21 2 In...

Page 70: ... 20 3 3 Since drafts may result carefully select the installation location 4 When power returns units resume the settings made before the power failure Caution When auto restart after power failure reset is set be sure to turn off air conditioners then cut off the power supply before conducting maintenance inspection and other work If the power supply is cut off with the power switch left ON air c...

Page 71: ...wing air flow direction setting according to the respective purpose 1 5 4 Fan Speed OFF When Thermostat is OFF FFQ FHQ When the cool heat thermostat is OFF you can stop the indoor unit fan by switching the setting to Fan OFF Used as a countermeasure against odor for barber shops and restaurants Setting Table Mode No First Code No Second Code No Setting 13 23 1 01 F 4 direction air flow 02 T 3 dire...

Page 72: ...sure to set the addresses for the receiver and wireless remote controller For group control see the attached installation manual for the indoor unit If using together with a wired remote controller you have to change the main sub setting or the receiver Receiver Setting Set the wireless address switch SS2 on the transmitter board according to the table below When using both a wired and a wireless ...

Page 73: ...nter the setting 5 Hold down the button for at least 1 second to quit the FIELD SET MODE and return to the normal display Multiple Settings A b When the indoor is being operating by outside control central remote controller etc it sometimes does not respond to ON OFF and temperature setting commands from this remote controller Check what setting the customer wants and make the multiple setting as ...

Page 74: ... decoration panel air discharge outlet as well as on the back of the wireless remote controller PRECAUTIONS Set the Unit No of the receiver and the wireless remote controller to be equal If the settings differ the signal from the remote controller cannot be transmitted Wireless remote controller Unit No label Decoration panel 1 ...

Page 75: ...ing time button set the group No for each group Group No rises in the order of 1 00 1 01 1 15 2 00 4 15 etc The unified ON OFF controller however displays only the range of group numbers selected by the switch for setting each address 5 Push the timer ON OFF button and enter the selected group No 6 Push the inspection test button and return to the normal mode If the address has to be set individua...

Page 76: ...Si21 205 Settings Concerning Maintenance Field Setting 65 2 Settings Concerning Maintenance 2 1 Indoor Unit PCB FFQ B Capacity setting adaptor Service monitor LED ...

Page 77: ...Settings Concerning Maintenance Si21 205 66 Field Setting FHQ B Service monitor LED Capacity setting adaptor ...

Page 78: ...ttings Concerning Maintenance Field Setting 67 2 2 Outdoor Unit PCB 25 35 class Outline of PCB Detail of PCB 1 PCB 1 FU1 FU2 S11 PCB 2 S30 S20 S90 S80 S70 S10 W 1P101935 1K V U Connect to S11 on PCB 2 3P100242 1B ...

Page 79: ...Settings Concerning Maintenance Si21 205 68 Field Setting Detail of PCB 2 ...

Page 80: ...g 69 2 3 Outdoor Unit PCB 50 60 class PCB 1 Control PCB outdoor unit E AC1 FU2 3 15A H1 H2 S32 S33 S71 S31 S91 R2865 S40 S20 S90 S101 S51 S80 S10 AC2 PCB 2 Power Supply PCB Service Monitor PCB HAC1 V3 HE1 HE2 R2866 HL FU1 30A S52 S102 SW4 R2867 SW1 LED A ...

Page 81: ...Settings Concerning Maintenance Si21 205 70 Field Setting MID SPM S34 S72 R2868 S70 FU201 3 15A R2869 CN14 CN11 L1 L2 ...

Page 82: ...set by malfunction code reset for inspection Cannot be reset because the count is updated each time a malfunction occurs Mode No Function Content and Operation Method Example of Remote Controller Display 40 Malfunction Hysteresis You can change the history with the programming time up down button 41 Sensor Data Display Select the display sensor with the programming time up down button Display sens...

Page 83: ...Maintenance Mode Setting Si21 205 72 Field Setting ...

Page 84: ...rature 94 2 11 Moisture Protection Function 2 95 2 12 Defrost Control 96 2 13 Electronic Expansion Valve Control 97 2 14 Malfunctions 100 2 15 Forced Operation Mode 101 2 16 Voltage Detection Function 101 3 Outdoor Unit 50 60 class 102 3 1 Function of Thermistor 102 3 2 Mode Hierarchy 104 3 3 Frequency Control 105 3 4 Controls at Mode Changing Start up 107 3 5 Discharge Pipe Temperature Control 10...

Page 85: ...troller Remote Controller Sensor Emergency Operation Switch Remote Controller with Liquid Crystal ON OFF Air flow direction Fan speed etc Thermostat Control Monitoring Function Cool Heat Automatic Function Program Dry Fan Operation Drain Pump Control Freeze up Protection Function Heating Overload Control Defrosting Indoor Unit Fan Control Phase control Cold Air Prevention Function Flap Control Ope...

Page 86: ...ronic control unit 2P095006 2 EC0280 Fan motor 3P104408 1 4P 55W Fan motor capacitor 4 0MF 440VAC Swing flap motor MP35HCA 3P080801 1 Float switch 4P104167 1 FS 0211 Drain pump 3P103929 1 PLD 12230 DM 17 Capacity 35 50 60 Remarks Wired remote controller BRC1C517 Optional Accessory Wireless remote controller Heat pump BRC7E63W Optional Accessory Cooling only BRC7E66 Electronic Control Unit 2P095007...

Page 87: ...ing cooling operation under low outside air temperature For details see the section on cooling operation under low outside air temperature Initial setting Display Display Display Setting Setting Cooling Heating Cool Heat Automatic Set temperature Heating thermostat OFF Heating thermostat ON Cooling thermostat ON Cooling thermostat OFF Freeze prevention control Outdoor unit heat exchanger temperatu...

Page 88: ...y auto heat Drain Pump Control FFQ and FHQ OPTION After continuous 30 minutes of operation with downward horizontal blade position change the blade position to level and after one hour the unit operation can be reset The unit operation can be reset with changing operation mode into heating changing air flow direction or turning ON or OFF the unit operation S1117 Continuous 30 minutes operation of ...

Page 89: ... an occurrence of water level abnormality 1 2 a Behavior between occurrence and recovery of water level abnormality Occurrence of drain water level abnormality 1 2 b Behavior when the unit restarts by remote controller after the water level abnormality is recovered ...

Page 90: ...r stops during drain pump ON after compressor operation started 2 1 2 When compressor stops during drain pump OFF after compressor operation started 2 2 Operations when an occurrence of drain water level abnormality 2 2 a Behavior between occurrence and recovery of drain water level abnormality 0 ...

Page 91: ...205 80 Function and Control 2 2 b Behavior when the unit restarts by remote controller after the water level abnormality is recovered Occurrence of drain water level abnormality Recovery of drain water level abnormality ...

Page 92: ...te controller group control is applied Excluding simultaneous ON OFF operation 3 When conditions relating set temperature with remote controller and suction air temperature are out of the operating zone of remote controller thermostat shown in below diagram Excluding when automatic operation mode is selected Whenever operation is in the automatic mode remote controller thermostat can be used ts Se...

Page 93: ...nce and the power supply is to be shut off be sure to turn the remote controller s ON OFF switch OFF first Shutting the power supply switch off while the ON OFF switch is still ON is dangerous because the power failure automatic reset function will cause the indoor fan to start turning immediately or the outdoor unit fan to automatically start turning three minutes after the power supply is turned...

Page 94: ... Setting LL Horizontal Set Position Stop Error In Swing Operation OFF Horizontal In Airflow Direction Setting OFF Horizontal Overload Thermostat OFF In Swing Operation LL Horizontal Swing In Airflow Direction Setting LL Horizontal Set Position Cooling Operation Thermostat ON in Program Dry Mode In Swing Operation L Swing Swing In Airflow Direction Setting L Setting Set Position Thermostat OFF in P...

Page 95: ...an be operated as follows Operational The unit for another room is switched into non operational condition Non operational Operation of the indoor unit for the own room during non operation Fan OFF Louver becomes horizontal position ON LED on the remote controller blinks Indication of under central control on the remote controller displayed Note During automatic operation at the time of changing o...

Page 96: ... if casing temperature is below dew point dew gets condensed In order to prevent the dew condensation this control is used to operate the fan for a specified period of time thus discharging the moisture from the indoor unit Outline The fan rotates in LL mode even though the unit is turned off by the use of remote controller This control can be reset only by conducting the cooling or dry operation ...

Page 97: ...e discharge thermistor disconnected when cooling When the temperature of the discharge piping is lower than the temperature of outdoor heat exchanger a disconnected discharge thermistor can be detected 3 The outdoor heat exchanger thermistor is used for high pressure protection during cooling operation B Discharge Pipe Thermistor DOT 1 The discharge pipe thermistor is used to control the discharge...

Page 98: ...arge thermistor disconnected 3 When the temperature of the discharge piping is lower than the temperature of outdoor heat exchanger a disconnected discharge thermistor can be detected 4 The outdoor heat exchanger thermistor is used for high pressure protection during cooling operation B Discharge Pipe Thermistor DOT 1 The discharge pipe thermistor is used to control the discharge pipe 2 If the tem...

Page 99: ...ncluding drying Note Unless specified otherwise an indoor dry operation command must be regarded as cooling operation Air conditioner control mode Forced operating mode Forced cooling for Pump Down Operation Normal operating mode Cooling Heating Defrosting Stop mode except for cooling heating modes by indoor command Preheat operation During C capacitor is discharging Stop R2829 Air conditioner con...

Page 100: ...freeze up protection defrost 3 Determine lower limit frequency Set a maximum value as an lower limit frequency among the frequency lower limits of the following functions Four way valve operating compensation draft prevention pressure difference upkeep 4 Determine prohibited frequency There is a certain prohibited frequency such as a power supply frequency For Cooling Only Model 1 Determine comman...

Page 101: ... frequency previously calculated 2 I control If the operating frequency is not change more than a certain fixed time adjust the frequency up and down according to the D value obtaining the fixed D value When the D value is small lower the frequency When the D value is large increase the frequency 3 Limit of frequency variation width When the difference between input current and input current droop...

Page 102: ...d Detail The OFF delay of four way valve Energize the coil for 150 sec after unit operation is stopped 2 4 3 Four Way Valve Operation Compensation Outline Heat Pump Only At the beginning of the operation as the four way valve is switched acquire the differential pressure required for activating the four way valve by having output the operating frequency which is more than a certain fixed frequency...

Page 103: ...ing on the drooping zone the frequency will be 2 Hz drooping Repeating the above drooping continues until the current rushes on the drooping zone without change In the unchanged zone the frequency limit will remain In the return reset zone the frequency limit will be cancelled Limitation of current drooping and stop value according to the outdoor air temperature 1 In case the operation mode is coo...

Page 104: ... Zone 2 8 Heating Peak cut Control Outline Heat Pump Only During heating operation the signals being sent from the indoor unit allow the operating frequency limitation and prevent abnormal high pressure The signal from the indoor unit must be divided as follows Detail Conditions for Start Controlling Judge the controlling start with the indoor heat exchanger temperature after 2 min from operation ...

Page 105: ...lower limit of the output frequency is limited to two stages under the condition of outside air temperature This time in addition to this purpose this function is adopted also for prevention of cold draught by securing the blown air temperature at the time of heating operation by low temperature out side air Processing 1 At the first step During operation of compressors Outdoor temperature DOA1CG ...

Page 106: ... In order to obtain the dependability of the compressor the compressor must be stopped according to the conditions of the temperature of the outdoor air and outdoor heat exchanger Detail Operation stop depending on the outdoor air temperature Compressor operation turns OFF under the conditions that the system is in cooling operation and outdoor air temperature is below 10 C Cooling Heating DOA1CGC...

Page 107: ...outdoor air temperature and heat exchanger temperature Under the conditions that the system is in heating operation 6 minutes after the compressor is started and more than 44 minutes of accumulated time pass since the start of the operation or ending the defrosting Conditions for Canceling Defrost The judgment must be made with heat exchanger temperature 4 C 22 C Frequency Compressor Four way valv...

Page 108: ...Discharge pipe temperature control Detail The followings are the examples of control which function in each mode by the electronic expansion valve control R2833 Fully closed when power is turned ON Open control when starting Control of target discharge pipe temperature Pressure equalizing control Open control when starting Control of target discharge pipe temperature Defrost control FD 1 Pressure ...

Page 109: ...e 2 13 6 Disconnection of the Discharge Pipe Thermistor Outline Detect a disconnected discharge pipe thermistor by comparing the discharge pipe temperature with the condensation temperature If any is disconnected open the electronic expansion valve according to the outdoor air temperature and the operating frequency and operate for a specified time and then stop After 3 minutes of waiting restart ...

Page 110: ...ischarge pipe temperature from the indoor and outdoor heat exchanger temperature and adjust the electronic expansion valve opening so that the actual discharge pipe temperature become close to that temperature Indirect SH control using the discharge pipe temperature Determine a correction value of the electronic expansion valve compensation and drive it according to the deflection of the target di...

Page 111: ...must be regarded as gas insufficient In addition to such conventional function if the discharge temperature is higher than the target discharge pipe temperature and the electronic expansion valve is fully open 55 pulses more than the specified time it is considered as an insufficient gas With the conventional function a power consumption is weak comparing with that in the normal operation when gas...

Page 112: ...t is the stop mode 3 The forced operation is ON The forced operation is allowed when the above and conditions are met Starting adjustment If the forced operation switch is pressed as the above conditions are met 1 Command frequency 66 Hz 2 Electronic expansion valve opening Depending on the capacity of the indoor unit 3 Outdoor unit adjustment Compressor is in operation 4 Indoor unit adjustment Tr...

Page 113: ...he discharge thermistor disconnected when cooling When the temperature of the discharge piping is lower than the temperature of outdoor heat exchanger a disconnected discharge thermistor can be detected 3 The outdoor heat exchanger thermistor is used for high pressure protection during cooling operation B Discharge Pipe Thermistor DOT 1 The discharge pipe thermistor is used to control the discharg...

Page 114: ...charge thermistor disconnected When the temperature of the discharge piping is lower than the temperature of outdoor heat exchanger a disconnected discharge thermistor can be detected 3 The outdoor heat exchanger thermistor is used for high pressure protection during cooling operation B Discharge Pipe Thermistor DOT 1 The discharge pipe thermistor is used to control the discharge pipe If the tempe...

Page 115: ...ncluding drying Note Unless specified otherwise an indoor dry operation command must be regarded as cooling operation Air conditioner control mode Forced operating mode Forced cooling for Pump Down Operation Normal operating mode Cooling Heating Defrosting Stop mode except for cooling heating modes by indoor command Preheat operation During C capacitor is discharging Stop R2829 Air conditioner con...

Page 116: ...freeze up protection defrost 3 Determine lower limit frequency Set a maximum value as an lower limit frequency among the frequency lower limits of the following functions Four way valve operating compensation draft prevention pressure difference upkeep 4 Determine prohibited frequency There is a certain prohibited frequency such as a power supply frequency For Cooling Only Model 1 Determine comman...

Page 117: ...e from the frequency previously calculated 2 I control If the operating frequency is not change more than a certain fixed time adjust the frequency up and down according to the D value obtaining the fixed D value When the D value is small lower the frequency When the D value is large increase the frequency 3 Limit of frequency variation width When the difference between input current and input cur...

Page 118: ...ation stopped Detail The OFF delay of four way valve Energize the coil for 150 sec after unit operation is stopped 3 4 3 Four Way Valve Operation Compensation Outline Heat Pump Only At the beginning of the operation as the four way valve is switched acquire the differential pressure required for activating the four way valve by having output the operating frequency which is more than a certain fix...

Page 119: ...hing on the drooping zone the frequency will be 2 Hz drooping Repeating the above drooping continues until the current rushes on the drooping zone without change In the unchanged zone the frequency limit will remain In the return reset zone the frequency limit will be cancelled Limitation of current drooping and stop value according to the outdoor air temperature 1 In case the operation mode is co...

Page 120: ... Zone 3 8 Heating Peak cut Control Outline Heat Pump Only During heating operation the signals being sent from the indoor unit allow the operating frequency limitation and prevent abnormal high pressure The signal from the indoor unit must be divided as follows Detail Conditions for Start Controlling Judge the controlling start with the indoor heat exchanger temperature after 2 min from operation ...

Page 121: ...tdoor air temperature is lower than 37 C the fan tap must be set to L 2 When Heating Operation When the outdoor air temperature is higher than 4 C the fan tap must be turned to L only for heat pump model 3 10 Moisture Protection Function 2 Outline In order to obtain the dependability of the compressor the compressor must be stopped according to the conditions of the temperature of the outdoor air ...

Page 122: ...utdoor heat exchanger temperature must be more than its fixed value when finishing Detail Conditions for Starting Defrost The starting conditions must be made with the outdoor air temperature and heat exchanger temperature Under the conditions that the system is in heating operation 6 minutes after the compressor is started and more than 44 minutes of accumulated time pass since the start of the o...

Page 123: ...Discharge pipe temperature control Detail The followings are the examples of control which function in each mode by the electronic expansion valve control R2833 Fully closed when power is turned ON Open control when starting Control of target discharge pipe temperature Pressure equalizing control Open control when starting Control of target discharge pipe temperature Defrost control FD 1 Pressure ...

Page 124: ...e 3 13 6 Disconnection of the Discharge Pipe Thermistor Outline Detect a disconnected discharge pipe thermistor by comparing the discharge pipe temperature with the condensation temperature If any is disconnected open the electronic expansion valve according to the outdoor air temperature and the operating frequency and operate for a specified time and then stop After 3 minutes of waiting restart ...

Page 125: ...ischarge pipe temperature from the indoor and outdoor heat exchanger temperature and adjust the electronic expansion valve opening so that the actual discharge pipe temperature become close to that temperature Indirect SH control using the discharge pipe temperature Determine a correction value of the electronic expansion valve compensation and drive it according to the deflection of the target di...

Page 126: ...ust be regarded as gas insufficient In addition to such conventional function if the discharge temperature is higher than the target discharge pipe temperature and the electronic expansion valve is fully open 450 pulses more than the specified time it is considered as an insufficient gas With the conventional function a power consumption is weak comparing with that in the normal operation when gas...

Page 127: ...t is the stop mode 3 The forced operation is ON The forced operation is allowed when the above and conditions are met Starting adjustment If the forced operation switch is pressed as the above conditions are met 1 Command frequency 66 Hz 2 Electronic expansion valve opening Depending on the capacity of the indoor unit 3 Outdoor unit adjustment Compressor is in operation 4 Indoor unit adjustment Tr...

Page 128: ...Indoor Unit 138 3 2 Self Diagnosis with the LED on the Outdoor Unit 138 4 Error Codes and LED Indication 139 5 Troubleshooting for Indoor Unit 142 5 1 Failure of Indoor Unit PC Board 142 5 2 Malfunction of Drain Water Level System Float Type 143 5 3 Failure of Drain System 145 5 4 Indoor Unit Fan Motor Lock 146 5 5 Malfunction of Indoor Unit Fan Motor 147 5 6 Swing Flap Motor Malfunction Lock 149 ...

Page 129: ... class 186 7 Troubleshooting for Outdoor Unit 50 60 class 195 7 1 OL Activation Compressor Overload 195 7 2 Compressor Lock 196 7 3 DC Fan Lock 197 7 4 Input Over Current Detection 198 7 5 Four Way Valve Abnormality 200 7 6 Discharge Pipe Temperature Control 202 7 7 Position Sensor Abnormality 203 7 8 CT or Related Abnormality 204 7 9 Thermistor or Related Abnormality Outdoor Unit 206 7 10 Electri...

Page 130: ...ating even if remote controller is set to Low It is normal It is caused by the activation of the overload control airflow shift control 15 Flap automatically moves during cooling It is normal It is caused by the activation of the dew prevention function or ceiling soiling prevention function 16 Indoor unit fan operates in L mode for 1 minute in microcomputer controlled dry mode even if compressor ...

Page 131: ...on power switch or replace fuse If high harmonics circuit breaker is not used on inverter compressor have the circuit breaker replaced Wait until power returns Normal Equipment starts operation 3 minutes later 3 min standby Diagnose based on error code on remote controller Normal Equipment starts operation 3 minutes later 3 min standby Diagnose based on error code on remote controller Check electr...

Page 132: ...ndoor fan operates but compressor does not Applicable Model All models of SkyAir series Method of Malfunction Detection Malfunction Decision Conditions Possible Causes Faulty thermistor Faulty indoor outdoor unit PCB Faulty magnetic switch Faulty power transistor Faulty compressor ...

Page 133: ...ic switch or SW circuit of power transistor Output from magnetic switch or U V W of power transistor Indoor unit fan runs at set airflow rate In cooling operation When air thermistor ambient temperature is higher than set temperature In heating operation When air thermistor ambient temperature is lower than set temperature Is the power switch OFF or the fuse for power switch blown Is rated voltage...

Page 134: ... of indoor unit fan Troubleshooting Diagnose based on the error code on remote controller Malfunction of fan motor Check the magnetic switch and aux switch for fan motor Cleaning Remove the disturbing item Cleaning of the heat exchanger After vacuum drying charge correct amount of refrigerant Possible causes as follows Refrigerant overcharge Mixing of air in refrigerant system Does the fan rotate ...

Page 135: ... in 3 min standby mode Contact power company Check compressor Replace power cable Expansion valve malfunction Four way valve malfunction Check compressor Turn the operation switch ON and OFF then wait at ON side After vacuum drying charge correct amount of refrigerant Then start operation again NO YES YES YES Malfunction of compressor YES YES Is the discharge side of compressor hot after unit stop...

Page 136: ...ection thermostat Overcurrent relay may act due to the following reasons Lower voltage of power supply Excess level of high pressure Insufficient size of power cable Malfunction of compressor Compressor protection thermostat may act due to the following reasons Internal leakage of four way valve There is no difference between suction and discharge temperature Insufficient compression of compressor...

Page 137: ...S YES YES NO NO NO NO NO NO S1994 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Measure the temperature of suction air and supply air Temperature difference Suction air temp Supply air temp Possible causes as follows Incorrect selection of model Affection of direct sun Clogged air filter Soiled heat exchanger Malfunction of fan moto...

Page 138: ...be considered After vacuum drying charge correct amount of refrigerant Check each item Check each item Check each item Temperature difference for heating should be between 16 and 23 C Is the unit in defrost mode Is the operation current less than specified level Does the heat load increase after installation of the unit YES YES YES YES YES YES Incorrect selection of model Affection of sunlight Aff...

Page 139: ...tor Refer error code A6 Normal Fog is generated due to defrosting operation Is white fog coming out from the unit Is the heat exchanger of indoor unit soiled Is the site dusty or with dense oil mist NO NO NO Is the airflow rate too small NO NO YES YES YES YES Is the room temperature higher than set value in cooling operation YES Continue unit operation It may be necessary to remove the source of h...

Page 140: ...e Normal Creak generates by shrinkage of resin parts due to temperature change Normal After vacuum drying charge correct amount of refrigerant NO YES YES YES Does the noise generate with vibration of whole ceilings and walls YES NO NO NO Does the noise generate with vibration of unit mounting section Continuous slight noise of shoo during cooling or defrosting YES Power supply side Is the piping s...

Page 141: ...t collected inside the indoor unit are blown out Cleaning for inside of indoor unit is necessary Dust collected inside the indoor unit are blown out Cleaning for inside of indoor unit is necessary Install air filter Does the trouble generate at the time of operation start again after extended period of operation YES YES NO NO Is air filter equipped S1998 Caution Be sure to turn off power switch be...

Page 142: ...is checking to confirm that remote controller is normal Indication appears for short time Turn the switch to Normal and reset power supply Check the unit based on indoor unit LED and outdoor unit LED Trouble Shooting Trouble generates just after power supply ON YES YES NO NO Is the position of SS 1 on indoor unit PCB at Emergency S1999 Caution Be sure to turn off power switch before connect or dis...

Page 143: ... reversed YES NO X36A FFQ B X29A and X14A FHQ BU NO YES YES YES Replace the indoor unit PC board Replace the swing motor assembly NO 220 240 VAC NO YES NO Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred S2731 Is the limit switch s transfer connector correctly connected Turn the power supply off once and back on and check whether the s...

Page 144: ... Test Operation button once Press Inspection Test Operation button once Or after 30 minutes After 10 seconds Press Inspection Test Operation button once Press Inspection Test Operation button once Indoor unit settings can be made Filter sign time Air flow direction Others Following codes can be checked Malfunction codes Indoor model code Outdoor model code Service data can be obtained Malfunciton ...

Page 145: ...ED blinks and malfunction code is displayed Even if stop operation is carried out malfunction contents are displayed when the inspection mode is entered The malfunction code enables you to tell what kind of malfunction caused operation to stop See page 137 for malfunction code and malfunction contents Operation lamp Inspection display Malfunction code Indoor unit No In which a malfunction occurs ...

Page 146: ...eration in step 4 until a buzzer remains ON The continuous buzzer indicates that the malfunction code is confirmed Continuous beep No abnormality 3 Press the MODE selector button The left 0 upper digit indication of the malfunction code flashes 4 Malfunction code upper digit diagnosis Press the UP or DOWN button and change the malfunction code upper digit until the malfunction code matching buzzer...

Page 147: ...n is pressed If no button is pressed for 1 minute equipment returns to normal status When MODE selector button is pressed or no button is pressed for 1 minute equipment returns to normal status If no button is pressed for 1 minute equiment returns to normal status 3 Press MODE selector button 1 Press INSPECTION TEST button 5 Press MODE selector button ...

Page 148: ...te controller is fault The remote controller thermistor does not function but the system thermo run is possible U4 Transmission error indoor unit outdoor unit Note 1 Incorrect wiring between indoor and outdoor units or malfunction of the PC board mounted on the indoor and the outdoor units If UF is shown the wiring between the indoor and outdoor units is not properly wired Therefore immediately di...

Page 149: ...ring between indoor and outdoor unit may be incorrect or disconnected Before performing the previously described troubleshooting check the wiring If the outdoor unit is inverter unit the outdoor unit fuse may be blown 5 Troubleshoot by turning off the power supply for a minimum of 5 seconds turning it back on and then rechecking the LED display 3 2 Self Diagnosis with the LED on the Outdoor Unit T...

Page 150: ...e System Remote Controller Display Location of Malfunction Contents of Malfunction Details of Malfunction Reference Page Other thanPC Board PC Board Outdoor Unit Indoor Unit Remote Controller U4 Transmission error between indoor and outdoor unit 156 U5 Transmission error between indoor and remote controller 157 U8 Transmission error between main remote controller and sub remote controller 158 UA E...

Page 151: ...gnosis by LED refer to p 138 142 4 3 5 A3 Malfunction of drain water level system 143 5 AF Float switch operation during compressor stop 145 5 A6 FHQ only Indoor unit fan motor overload overcurrent lock 146 147 5 A7 Swing flap motor Malfunction Lock 149 5 AJ Failure of capacity setting 151 5 C4 Malfunction of heat exchanger temperature sensor system R2T 152 5 C5 Malfunction of heat exchanger tempe...

Page 152: ...ontrol 169 202 F6 High pressure control in cooling 184 217 H6 Position sensor abnormality 170 203 H8 CT or related abnormality 171 204 H9 Outdoor air thermistor or related abnormality 173 206 J3 Discharge pipe thermistor or related abnormality 173 206 J6 Heat exchanger thermistor or related abnormality 173 206 L3 Electrical box temperature rise 175 208 L4 Radiation fin temperature rise 177 210 L5 ...

Page 153: ...n data could not be correctly received from the E PROM E PROM Type of nonvolatile memory Maintains memory contents even when the power supply is turned off Supposed Causes Failure of PC board Troubleshooting Turn the power supply off once and then back on Normal reset YES NO Could be outside cause noise etc other than malfunction Indoor unit PC board replacement S2006 Caution Be sure to turn off p...

Page 154: ...ls FFQ B FHQ BU Method of Malfunction Detection By float switch OFF detection Malfunction Decision Conditions When rise of water level is not a condition and the float switch goes OFF Supposed Causes Failure of drain pump Improper drain piping work Drain piping clogging Failure of float switch Failure of indoor unit PC board Failure of short circuit connector ...

Page 155: ...ng mechanism connected YES YES YES Does display of malfunction A3 appear YES YES 220 240 VAC YES NO Continuity check of short circuit connector Set to emergency and check the voltage of X25A If A3 is detected by a PC board which is not mounted with X15A the PC board is defective Short circuit connector connection Short circuit connector replacement Indoor unit PC board replacement Connect drain pu...

Page 156: ...tch Check to see if drain up height and horizontal pipe length exceed specifications Clogged drain water discharge system Clogged drain pump Faulty float switch Replace indoor unit PCB Check jumper connector X15A Check drain pump and drain pipe Check water drainage system Check to see if drain up height and horizontal pipe length exceed specifications Faulty trap in water drainage system Replace i...

Page 157: ... output voltage to the fan is maximum Supposed Causes Failure of indoor unit fan motor Broken or disconnected wire Failure of contact Failure of indoor unit PC board Troubleshooting With X26A unplugged and the power supply turned on is there about 12 VDC between pins 1 and 3 of X26A YES YES Connect correctly Indoor unit PC board replacement Check indoor unit fan motor and motor wiring Are X20A and...

Page 158: ... fan motor Malfunction Decision Conditions When fan speed does not increase Supposed Causes Disconnection short circuit or disengagement of connector in fan motor harness Faulty fan motor disconnection poor insulation Abnormal signal from fan motor faulty circuit Faulty PC board Instantaneous fluctuation of power supply voltage Fan motor lock Caused by motor or other external factors Fan does not ...

Page 159: ...r YES Replace the indoor unit PC board Turn off the power supply Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred S2578 Is the harness from the fan motor correctly connected to X20A connector on A1P Is there any foreign matter around the fan Does the resistance between U V W phases of fan motor balance each other Is there short circuit...

Page 160: ...etection Utilizes ON OFF of the limit switch when the motor turns Malfunction Decision Conditions When ON OFF of the microswitch for positioning cannot be reversed even though the swing flap motor is energized for a specified amount of time about 30 seconds Supposed Causes Failure of motor Failure of microswitch Failure of connector connection Failure of indoor unit PC board ...

Page 161: ...ected Does the swing flap motor swing Are the connectors correctly connected to X29A and X14A on the PC board NO YES YES NO YES Does continuity no continuity reverse YES 220 240 VAC NO NO YES NO Turn the power supply off once and back on and measure the output voltage of connector X29A when the power supply is turned back on Turn the power supply off once and back on and check whether the swing fl...

Page 162: ...ng adaptor that matches the capacity of the unit is required in the following case If the indoor PC board installed at the factory is for some reason changed at the installation site the capacity will not be contained in the replacement PC board If you connect a capacity setting adaptor to a PC board in which the capacity is memorized the capacity setting for the PC board will become the capacity ...

Page 163: ...ensor itself Broken or disconnected wire Failure of electronic circuitry indoor unit PC board Failure of connector contact Troubleshooting Check No 2 Refer to P 163 Disconnect the heat exchanger sensor R2T from X18A on the indoor unit PC board and measure the resistance Connect correctly Heat exchanger sensor replacement If contact is OK replace indoor unit PC board Is the thermistor normal See no...

Page 164: ... sensor itself Broken or disconnected wire Failure of electronic circuitry indoor unit PC board Failure of connector contact Troubleshooting Check No 2 Refer to P 163 Disconnect the heat exchange sensor R3T from X17A on the indoor unit PC board and measure the resistance Connect correctly Heat exchanger sensor replacement If contact is OK replace indoor unit PC board Is the thermistor normal See n...

Page 165: ...re of the sensor itself Broken or disconnected wire Failure of indoor unit PC board Failure of connector contact Troubleshooting Check No 2 Refer to P 163 Disconnect the sunction air temperature sensor R1T from X19A on the indoor unit PC board and measure the resistance Connect correctly Suction air temperature sensor replacement If contact is OK replace outdoor unit PC board Is the thermistor nor...

Page 166: ...r Malfunction Decision Conditions When the remote controller thermistor becomes disconnected or shorted while the unit is running Supposed Causes Failure of sensor itself Broken wire Troubleshooting Check No 2 Refer to P 163 Turn the power supply off once and then back on Replace remote controller Could be outside cause noise etc other than malfunction Is CJ displayed on the remote controller NO Y...

Page 167: ...wiring If the LEDs on the indoor unit PC board are off it indicates that the transmission wiring between indoor and outdoor units may be incorrect or broken disconnected Is HAP blinking NO NO ON or OFF YES Is HAP blinking Is U4 displayed normally Check for indoor unit microcomputer normal HAP YES Turn the power supply off once and then back on Faulty indoor unit PC board or malfunction of power su...

Page 168: ...r supply temporarily then restart operation Indoor unit PC board replacement Malfunction could be produced by noise Check the surrounding area and restart operation Change to double core independent cable Failure of remote controller PC board or replacement of defective indoor unit PC board Malfunction could be produced by noise Check the surrounding area and restart operation All indoor unit PC b...

Page 169: ...ain remote controller and Sub remote controller Connection among Sub remote controllers Faulty remote controller PCB Troubleshooting Turn the SS 1switch of one remote controller to Main Turn OFF the power supply and restart operation Turn OFF the power once and restart operation Replace remote controller PCB if any error is generated Turn the SS 1switch of one remote controller to Main Turn OFF th...

Page 170: ... Controller Display UA Applicable Models FFQ B FHQ BU Method of Malfunction Detection Malfunction Decision Conditions Incorrect field setting The number of indoor units connected to this system is more than limited Supposed Causes Indoor Outdoor Indoor Indoor transmission line Faulty remote controller wiring ...

Page 171: ...ect Does the system conduct normal operation YES YES YES YES NO YES Turn the power supply off once and back on to restart Are the jumpers between indoor indoor and indoor outdoor correctly connected NO NO Is 220 240 VAC between No 1 and 3 of X2M terminal indoor unit YES YES Connect the remote controller correctly Is the remote controller connected to one or more indoor units NO YES Remove the jump...

Page 172: ... units Malfunction Decision Conditions When the microcomputer judges that the centralized address signal is duplicated Supposed Causes Faulty centralized address setting Faulty indoor unit PC board Troubleshooting Change the setting so that the centralized address is not duplicated Are devices relating to centralized control connected to the indoor unit YES NO Replace the indoor unit PC board S260...

Page 173: ...r Power Supply Line 1 Turn the power supply off With the relay connector disconnected measure the resistance between UVW phases of the connector 3 cores at the motor side then make sure that the resistance between each phase is balanced and not short circuited Red White Black U V W Measure the resistance between each phase S2675 ...

Page 174: ...0 59 8 57 8 4 0 54 1 52 3 6 0 48 9 47 3 8 0 44 3 42 9 10 0 40 2 38 9 12 0 36 5 35 3 14 0 33 2 32 1 16 0 30 2 29 2 18 0 27 5 26 6 20 0 25 1 24 3 22 0 23 0 22 2 24 0 21 0 20 3 26 0 19 2 18 5 28 0 17 6 17 0 30 0 16 2 15 6 32 0 14 8 4 2 34 0 13 6 13 1 36 0 12 5 12 0 38 0 11 5 11 1 40 0 10 6 10 3 42 0 9 8 9 5 44 0 9 1 8 8 46 0 8 4 8 2 48 0 7 8 7 6 50 0 7 2 7 0 52 0 6 9 6 7 54 0 6 2 6 0 56 0 5 7 5 5 58 ...

Page 175: ...e defective Stop valve defective Troubleshooting Check No 4 Refer to P 187 Check No 5 Refer to P 188 Check No 6 Refer to P 189 Check No 11 Refer to P 192 Insert the thermistor in position Replace the discharge pipe thermistor Replace the valve itself or the coil Replace the four way valve coil or the valve itself Replace the outdoor unit PCB Refer to the refrigerant line check procedure Replace th...

Page 176: ...for about 5 minutes normal Supposed Causes Compressor locked Troubleshooting Note If the model doesn t have SPM replace the outdoor unit PCB Turn off the power Disconnect the harnesses U V and W Inverter checker Part No 1225477 Correct the power supply or replace the SPM Replace the outdoor unit PCB Replace the compressor Check the electronic expansion valve Replace it as required Replace the comp...

Page 177: ...0 Note If the model doesn t have SPM replace the outdoor unit PCB Replace the outdoor unit PCB Inverter checker Part No 1225477 Correct the power supply or replace the SPM Replace the outdoor unit PCB R2952 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Input current flowing above its stop level NO YES Any LED off YES NO Check with t...

Page 178: ...stor are checked to see if they function within their normal ranges in the operating mode Malfunction Decision Conditions A following condition continues over 10 minute after operating 5 minutes Cooling dry operation room temp indoor heat exchanger temp 10 C Heating indoor unit heat exchanger temp room temp 10 C Supposed Causes Connector in poor contact Thermistor defective Outdoor unit PCB defect...

Page 179: ...to turn off power switch before connect or disconnect connector or parts damage may be occurred Four way valve coil disconnected loose YES YES NO Functioning NO Check No 11 Check the refrigerant line Malfunctioning l Insufficient gas l Water mixed l Stop valve defective Harness out of connector NO YES Disconnect the harness from the connector Resistance between harnesses about 3kΩ 0 5kΩ Malfunctio...

Page 180: ...rmistor defective heat exchanger or outdoor air temperature thermistor defective Outdoor unit PCB defective Water mixed in the local piping Electronic expansion valve defective Stop valve defective Troubleshooting Check No 4 Refer to P 187 Check No 6 Refer to P 189 Check No 11 Refer to P 192 1 above 45Hz rising above 40Hz dropping 120 80 2 130 45Hz rising 25 40Hz dropping 110 70 3 below 30Hz risin...

Page 181: ... Causes Compressor itself defective Outdoor unit PCB defective Stop valve closed Input voltage out of specification Troubleshooting Check No 13 Refer to P 193 Replace the outdoor unit PCB Replace the outdoor unit PCB Reconnect as specified Inverter checker Part No 1225477 Correct the power supply or replace the outdoor unit PCB Replace the compressor R3041 Caution Be sure to turn off power switch ...

Page 182: ...function Decision Conditions The compressor running frequency is below 62 Hz and the CT input is below 0 1 V The input current is also below 0 5 A If this error repeats 4 times the system will be shut down The error counter will reset itself if this or any other error does not occur during the following 60 minute compressor running time total time Supposed Causes Power transistor defective Interna...

Page 183: ... off power switch before connect or disconnect connector or parts damage may be occurred Running current as shown at right with relay cable 1 or 2 YES Current guideline 2 sec Time Rising with increasing frequency Capacitor charged when the indoor unit or outdoor unit main relay turns on NO NO DC290 380V YES Voltage within the allowable range Supply voltage 15 YES NO Any LED off Compressor running ...

Page 184: ...ng the temperature Malfunction Decision Conditions The thermistor input is above 4 96 V or below 0 04 V with the power on Error J3 is judged if the discharge pipe thermistor temperature is smaller than the condenser thermistor temperature Supposed Causes Connector in poor contact Thermistor defective Outdoor unit PCB defective Indoor unit PCB defective Condenser thermistor defective in the case of...

Page 185: ...uid pipe temperature thermistor l Gas pipe temperature thermistor l Outdoor air temperature thermistor Replace the following thermistor l Indoor unit heat exchanger thermistor Replace the outdoor unit PCB Replace the indoor unit PCB R3043 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Error displayed again on remote controller NO YES...

Page 186: ...cted by checking the radiation fin thermistor with the compressor off Malfunction Decision Conditions With the compressor off the radiation fin temperature is above 122 C Reset is made when the temperature drops below 113 C Supposed Causes Fin temperature rise due to defective outdoor unit fan Fin temperature rise due to short circuit Fin thermistor defective Connector in poor contact Outdoor unit...

Page 187: ...in R2953 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Error again or outdoor unit fan activated YES l Fin thermistor NO Slightly dirty Check No 9 Check the outdoor unit fan or related Malfunctioning Radiation fin dirty Too dirty Functioning Thermistor as specified in its characteristic chart Above 122 C NO YES NO YES Check the radi...

Page 188: ...tions If the radiation fin temperature with the compressor on is above 81 C If a radiation fin temperature rise takes place 4 times successively the system will be shut down The error counter will reset itself if this or any other error does not occur during the following 60 minute compressor running time total time Supposed Causes Fin temperature rise due to defective outdoor unit fan Fin tempera...

Page 189: ...lace the PCB or the power transistor Replace the fan motor Correct the connectors and fan motor leads Replace the outdoor unit PCB Clean up the radiation fin R2851 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Error displayed again YES NO Slightly dirty Check No 9 Check the outdoor unit fan or related Malfunctioning Radiation fin di...

Page 190: ...he compressor is running An output over current input is fed from the output over current detection circuit to the microcomputer The system will be shut down if the error occurs 16 times Clearing condition Continuous run for about 5 minutes normal Supposed Causes Over current due to defective power transistor Over current due to wrong internal wiring Over current due to abnormal supply voltage Ove...

Page 191: ...If the wires have been disconnected and reconnected for part replacement for example and the system is interrupted by an output over current take the following procedure Error again NO YES NO YES Voltage as rated YES NO Short circuit or breakage between compressor s coil phases NO YES Normal YES NO Any LED off Turn off the power and turn it on again to get the system started See if the same error ...

Page 192: ...tection I Input current A Hz x Compressor running frequency Voltage However when the status of running frequency Hz is kept on for a certain time Note The values are different from model to model Gas shortage detection II If a gas shortage error takes place 4 times successively the system will be shut down The error counter will reset itself if this or any other error does not occur during the fol...

Page 193: ...oor unit heat exchanger thermistor 1 Replace the PCB 2 Replace the compressor Procedure complete R2853 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Any thermistor disconnected YES Malfunctioning Malfunctioning NO Functioning Stop valve closed NO YES Check the CT YES NO Gas shortage error again Functioning Check No 6 Check the therm...

Page 194: ...ing condition Continuous run for about 60 minutes normal Supposed Causes Supply voltage not as specified Over voltage detection circuit defective PAM control part s defective Troubleshooting Note If the model doesn t have SPM replace the outdoor unit PCB Check the supply voltage Correct the power supply Check for such factors for a long term Replace the SPM Replace the outdoor unit PCB R2957 Cauti...

Page 195: ...emperature being sensed by the heat exchanger thermistor exceeds the limit Malfunction Decision Conditions Activated when the temperature being sensed by the heat exchanger thermistor rises above 60 C Deactivated when the said temperature drops below 50 C Supposed Causes The installation space is not large enough Faulty outdoor unit fan Faulty electronic expansion valve Faulty defrost thermistor F...

Page 196: ...n motor Repair the connector or fan motor lead wires Replace the heat exchanger thermistor Replace PCB Replace the electronic expansion valve or coil Replace the PCB Change the air outlet grille position Change the installation location Clean the heat exchanger Check the installation space Check No 9 Outdoor fan check Judgment Check No 6 Heat exchanger thermistor check Judgment Check No 7 Installa...

Page 197: ...heck No 02 1 Check connector connection 2 Check motor control voltage output pins 2 1 7 6 5 4 3 2 1 Motor power supply voltage Unused Unused P 0V reference potential Motor control voltage 15 VDC Rotation command voltage 1 5 VDC Rotation pulse input Upper fan connector 8 7 6 5 4 3 2 1 Motor power supply voltage Unused Unused Unused P 0V reference potential Motor control voltage 15 VDC Rotation comm...

Page 198: ...uctivity using a tester Check the conductivity between pins 1 3 and 6 and between pins 2 4 and 5 If there is no conductivity between the pins the EV coil is faulty 4 If no EV generates latching sound in the above step 2 the outdoor unit PCB is faulty 5 If the conductivity is confirmed in the above step 2 mount a good coil which generated latching sound in the EV unit that did not generate latching...

Page 199: ...lace the outdoor unit PCB Replace the four way valve coil Replace the four way valve R3047 NO Four way valve coil Cooling dry No continuity Heating Continuity YES YES Four way valve coil resistance at 3kΩ 0 5kΩ NO S80 voltage at DC 180 220 V with compressor on Fig 1 Disconnect the four way valve coil from the connector and check the continuity Fig 1 Voltage at S80 DC180 220V ON Compressor Time ...

Page 200: ...rmistors on the PCB and measure the resistance of each thermistor using tester The relationship between normal temperature and resistance is shown in the graph and the table below Thermistor R25 C 20kΩ B 3950 Temperature C 20 211 0 kΩ 15 150 10 116 5 5 88 0 67 2 5 51 9 10 40 15 31 8 20 25 25 20 30 16 35 13 40 10 6 45 8 7 50 7 2 Tester Resistance range ...

Page 201: ...air taken in by the outdoor unit The outside air temperature shall be 43 C or lower Check the allowable dimensions of the air suction and discharge area Is the air flow blocked by obstacles or winds blowing in the opposite direction R1438 Abnormal YES YES YES Does the discharged air from other outdoor unit cause an increase of the suction air temperature NO NO NO Is the heat exchanger very dirty D...

Page 202: ...ormal YES NO NO Continuity Are the resistance at connector leads 1 red black 2 white black Check the fan capacitor for continuity Does the outdoor fan rotate Does the outdoor unit fan start just after the power is turned on Check the outdoor fan system YES YES NO Normal No continuity Repair Replace the fan motor Replace the fan motor Replace the outdoor unit PCB The outdoor fan system is normal R2...

Page 203: ...see if there is waveform disturbance near the zero cross sections circled in Fig 2 6 15 9 Inverter Units Refrigerant System Check Check No 11 Fig 1 Fig 2 Refrigerant system check Check for gas leaks See the section on insufficient gas detection Conduct the check after operating the equipment for a sufficient length of time Correct the problem Conduct vacuum drying Replace the refrigerant Is the di...

Page 204: ... power transistor and capacitor voltage can be measured at the power transistor and terminals 6 15 11Power Transistor Check Check No 13 Note Check to make sure that the voltage between the terminal of Power transistor and is approx 0 volt before checking power transistor Measuring method Disconnect the compressor harness connector from the outdoor unit PCB To disengage the connector press the prot...

Page 205: ...f about 5 V between pins 1 and 3 Generation of 3 pulses between pins 2 and 3 when the fan motor is operating Failure of 1 faulty PCB Replace the PCB Failure of 2 faulty hall IC Replace the fan motor Both 1 and 2 result Replace the PCB MULTIMETER DC VOLTAGA RANGE DB1 TRM1 S90 THERMISTOR LEAD WIRE S80 FOUR WAY VALVE LEAD WIRE Heating Pump only S70 FAN MOTOR LEAD WIRE REACTOR LEAD WIRE COMPRESSOR LEA...

Page 206: ...e defective Stop valve defective Troubleshooting Check No 4 Refer to P 220 Check No 5 Refer to P 221 Check No 6 Refer to P 222 Check No 11 Refer to P 225 Insert the thermistor in position Replace the discharge pipe thermistor Replace the valve itself or the coil Replace the four way valve coil or the valve itself Replace the outdoor unit PCB Refer to the refrigerant line check procedure Replace th...

Page 207: ...f the error occurs 16 times Clearing condition Continuous run for about 5 minutes normal Supposed Causes Compressor locked Troubleshooting Turn off the power Disconnect the harnesses U V and W Inverter checker Part No 1225477 Correct the power supply or replace the SPM Replace the outdoor unit PCB Replace the compressor Check the electronic expansion valve Replace it as required Replace the compre...

Page 208: ...Continuous run for about 5 minutes normal Supposed Causes Fan motor breakdown Harness or connector disconnected between fan motor and PCB or in poor contact Foreign matters stuck in the fan Troubleshooting Check No 15 Refer to P 227 Turn off the power and reconnect the connector Remove Replace the outdoor unit fan motor Replace the outdoor unit PCB R2843 Caution Be sure to turn off power switch be...

Page 209: ...ons The following CT input with the compressor running continues for 2 5 seconds CT input Above 20 A The system will be shut down if the error occurs 16 times Clearing condition Continuous run for about 5 minutes normal Supposed Causes Over current due to compressor failure Over current due to defective power transistor Over current due to defective inverter main circuit electrolytic capacitor Ove...

Page 210: ...rent flowing above its stop level NO YES Normal NO YES Any LED off YES NO Check with the inverter checker Turn off the power and reconnect the harnesses Turn on the power again and get restarted Turn off the power and disconnect the harnesses U V and W Get restarted and measure the input current Check No 8 Check the discharge pressure Check No 7 Check the installation condition Check No 14 Check t...

Page 211: ...r are checked to see if they function within their normal ranges in the operating mode Malfunction Decision Conditions A following condition continues over 1 minute after operating 10 minutes Cooling dry operation room temp indoor heat exchanger temp 10 C Heating indoor unit heat exchanger temp room temp 10 C Supposed Causes Connector in poor contact Thermistor defective Outdoor unit PCB defective...

Page 212: ...to turn off power switch before connect or disconnect connector or parts damage may be occurred Four way valve coil disconnected loose YES YES NO Functioning NO Check No 11 Check the refrigerant line Malfunctioning l Insufficient gas l Water mixed l Stop valve defective Harness out of connector NO YES Disconnect the harness from the connector Resistance between harnesses about 1500 ohms Malfunctio...

Page 213: ...during the following 60 minute compressor running time total time Supposed Causes Refrigerant shortage Four way valve malfunctioning Discharge pipe thermistor defective heat exchanger or outdoor temperature thermistor defective Outdoor unit PCB defective Water mixed in the local piping Electronic expansion valve defective Stop valve defective Troubleshooting Check No 4 Refer to P 220 Check No 6 Re...

Page 214: ... cable disconnected Compressor itself defective Outdoor unit PCB defective Stop valve closed Input voltage out of specification Troubleshooting Check No 13 Refer to P 226 Replace the outdoor unit PCB outdoor unit fan Replace the outdoor unit PCB Reconnect as specified Inverter checker Part No 1225477 Correct the power supply or replace the outdoor unit PCB Replace the compressor R2847 Caution Be s...

Page 215: ...unction Decision Conditions The compressor running frequency is below 55 Hz and the CT input is below 0 1 V The input current is also below 1 25 A If this error repeats 4 times the system will be shut down The error counter will reset itself if this or any other error does not occur during the following 60 minute compressor running time total time Supposed Causes Power transistor defective Interna...

Page 216: ... off power switch before connect or disconnect connector or parts damage may be occurred Running current as shown at right with relay cable 1 or 2 YES Current guideline 2 sec Time Rising with increasing frequency Capacitor charged when the indoor unit or outdoor unit main relay turns on NO NO DC380 30V YES Voltage within the allowable range Supply voltage 15 YES NO Any LED off Compressor running Y...

Page 217: ...ng the temperature Malfunction Decision Conditions The thermistor input is above 4 96 V or below 0 04 V with the power on Error J3 is judged if the discharge pipe thermistor temperature is smaller than the condenser thermistor temperature Supposed Causes Connector in poor contact Thermistor defective Outdoor unit PCB defective Indoor unit PCB defective Condenser thermistor defective in the case of...

Page 218: ...at exchanger temperature thermistor l Outdoor air thermistor Replace the following thermistor l Indoor unit heat exchanger thermistor Replace the outdoor unit PCB Replace the indoor unit PCB R2849 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Error displayed again on remote controller NO YES YES YES NO Indoor unit heat exchanger the...

Page 219: ...tected by checking the radiation fin thermistor with the compressor off Malfunction Decision Conditions With the compressor off the radiation fin temperature is above 80 C Reset is made when the temperature drops below 70 C Supposed Causes Fin temperature rise due to defective outdoor unit fan Fin temperature rise due to short circuit Fin thermistor defective Connector in poor contact Outdoor unit...

Page 220: ... fin R2850 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Error again or outdoor unit fan activated YES l Fin thermistor NO Slightly dirty Check No 9 Check the outdoor unit fan or related Malfunctioning Radiation fin dirty Too dirty Functioning Thermistor as specified in its characteristic chart Above 80 C NO YES NO YES Check the rad...

Page 221: ...tions If the radiation fin temperature with the compressor on is above 90 C If a radiation fin temperature rise takes place 4 times successively the system will be shut down The error counter will reset itself if this or any other error does not occur during the following 60 minute compressor running time total time Supposed Causes Fin temperature rise due to defective outdoor unit fan Fin tempera...

Page 222: ...lace the PCB or the power transistor Replace the fan motor Correct the connectors and fan motor leads Replace the outdoor unit PCB Clean up the radiation fin R2851 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Error displayed again YES NO Slightly dirty Check No 9 Check the outdoor unit fan or related Malfunctioning Radiation fin di...

Page 223: ...he compressor is running An output over current input is fed from the output over current detection circuit to the microcomputer The system will be shut down if the error occurs 16 times Clearing condition Continuous run for about 5 minutes normal Supposed Causes Over current due to defective power transistor Over current due to wrong internal wiring Over current due to abnormal supply voltage Ove...

Page 224: ...ted and reconnected for part replacement for example and the system is interrupted by an output over current take the following procedure Error again NO YES NO YES Voltage as rated YES NO Short circuit or breakage between compressor s coil phases NO YES Normal YES NO Any LED off Turn off the power and turn it on again to get the system started See if the same error occurs Turn off the power and di...

Page 225: ...tion I Input current A Hz x Compressor running frequency Voltage However when the status of running frequency 55 Hz is kept on for a certain time Note The values are different from model to model Gas shortage detection II If a gas shortage error takes place 4 times successively the system will be shut down The error counter will reset itself if this or any other error does not occur during the fol...

Page 226: ...oor unit heat exchanger thermistor 1 Replace the PCB 2 Replace the compressor Procedure complete R2853 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Any thermistor disconnected YES Malfunctioning Malfunctioning NO Functioning Stop valve closed NO YES Check the CT YES NO Gas shortage error again Functioning Check No 6 Check the therm...

Page 227: ...earing condition Continuous run for about 60 minutes normal Supposed Causes Supply voltage not as specified Over voltage detector or DC voltage detection circuit defective PAM control part s defective Troubleshooting Check the supply voltage Correct the power supply Check for such factors for a long term Try to get restarted a couple of times Replace the SPM Replace the outdoor unit PCB R2854 Caut...

Page 228: ...emperature being sensed by the heat exchanger thermistor exceeds the limit Malfunction Decision Conditions Activated when the temperature being sensed by the heat exchanger thermistor rises above 60 C Deactivated when the said temperature drops below 50 C Supposed Causes The installation space is not large enough Faulty outdoor unit fan Faulty electronic expansion valve Faulty defrost thermistor F...

Page 229: ...n motor Repair the connector or fan motor lead wires Replace the heat exchanger thermistor Replace PCB Replace the electronic expansion valve or coil Replace the PCB Change the air outlet grille position Change the installation location Clean the heat exchanger Check the installation space Check No 9 Outdoor fan check Judgment Check No 6 Heat exchanger thermistor check Judgment Check No 7 Installa...

Page 230: ...heck No 02 1 Check connector connection 2 Check motor control voltage output pins 2 1 7 6 5 4 3 2 1 Motor power supply voltage Unused Unused P 0V reference potential Motor control voltage 15 VDC Rotation command voltage 1 5 VDC Rotation pulse input Upper fan connector 8 7 6 5 4 3 2 1 Motor power supply voltage Unused Unused Unused P 0V reference potential Motor control voltage 15 VDC Rotation comm...

Page 231: ...uctivity using a tester Check the conductivity between pins 1 3 and 6 and between pins 2 4 and 5 If there is no conductivity between the pins the EV coil is faulty 4 If no EV generates latching sound in the above step 2 the outdoor unit PCB is faulty 5 If the conductivity is confirmed in the above step 2 mount a good coil which generated latching sound in the EV unit that did not generate latching...

Page 232: ...lace the outdoor unit PCB Replace the four way valve coil Replace the four way valve R2856 NO Four way valve coil Cooling dry No continuity Heating Continuity YES YES Four way valve coil resistance at 1500 ohms NO S80 voltage at DC 180 220 V with compressor on Fig 1 Disconnect the four way valve coil from the connector and check the continuity Fig 1 Voltage at S80 DC180 220V ON Compressor Time ...

Page 233: ...s of the thermistors on the PCB and measure the resistance of each thermistor using tester The relationship between normal temperature and resistance is shown in the graph and the table below Thermistor R25 C 20kΩ B 3950 Temperature C 20 211 0 kΩ 15 150 10 116 5 5 88 0 67 2 5 51 9 10 40 15 31 8 20 25 25 20 30 16 35 13 40 10 6 45 8 7 50 7 2 ...

Page 234: ...an the heat exchanger Change the installation location or direction Check the outside air temperature temperature of air taken in by the outdoor unit The outside air temperature shall be 43 C or lower Check the allowable dimensions of the air suction and discharge area Is the air flow blocked by obstacles or winds blowing in the opposite direction R1438 Abnormal YES YES YES Does the discharged air...

Page 235: ...r Open the stop valve Replace the pipe installed at the site Clean Replace the compressor R3049 Not dirty YES YES Dirty NO NO NO Are the heat exchanger and air filter dirty Is the stop valve open Is the connection pipe deformed YES High Check the outdoor unit fan system Reconnect R2857 Outdoor unit fan running YES Fan motor lead wire connector disconnected YES NO NO Outdoor unit fan system functio...

Page 236: ...see if there is waveform disturbance near the zero cross sections circled in Fig 2 7 16 9 Inverter Units Refrigerant System Check Check No 11 Fig 1 Fig 2 Refrigerant system check Check for gas leaks See the section on insufficient gas detection Conduct the check after operating the equipment for a sufficient length of time Correct the problem Conduct vacuum drying Replace the refrigerant Is the di...

Page 237: ... 10 minutes after turning off the circuit breaker If unavoidably necessary to touch a live part make sure the power transistor s supply voltage is below 50 V using the tester For the UVW make measurements at the Faston terminal on the board or the relay connector Fan motor lead wire Solenoid valve lead wire Thermistor lead wire OL lead wire Reactor lead wire Compressor lead wire TB2 PS TB3 P2 N1 5...

Page 238: ... Make sure there is about DC 270 V between pins 4 and 7 3 With the system and the power still off reconnect the connector S70 4 Make a turn of the fan motor with a hand and make sure the pulse 0 15 V appears twice at pins 1 and 4 If the fuse is blown out the outdoor unit fan may also be in trouble Check the fan too If the voltage in Step 2 is not applied it means the PCB is defective Replace the P...

Page 239: ...Troubleshooting for Outdoor Unit 50 60 class Si21 205 228 Troubleshooting ...

Page 240: ...d PC Boards 256 2 3 Removal of Horizontal Blade 258 2 4 Removal of Fan Rotor and Fan Motor 259 2 5 Removal of Fan Bearing 261 2 6 Removal of Bottom Panel and Drain Pan 262 2 7 Removal of Swing Motor 263 3 Outdoor Unit 25 35 class 264 3 1 Removal of External Casing 264 3 2 Removal of Bellmouth 266 3 3 Removal of PCB and Electrical Box 267 3 4 Removal of Propeller Fan and Fan Motor 273 3 5 Removal o...

Page 241: ... power supplies before disassembling work Step Procedure Points 1 Removing the suction grille 1 To remove the suction grille slide the two tabs simultaneously and pull the suction grille down slowly The grille can be installed freely in four directions When closing push up the grille slowly 2 With the suction grille open at an angle of 45 lift it up to remove it S2630 S2631 ...

Page 242: ...Open the suction grille See the Removal of Suction Grille 2 Disengage the hooks of the air filter by pulling the filter downward at an angle and remove the filter 2 Installation of the air filter 1 Hook the air filter to the protrusions located at the top of the suction grille 2 Push the lower section of the air filter into the protrusions located at the bottom of the suction grille to secure the ...

Page 243: ...otor from the harness connector of electric parts 2 Check that the provisional hanger is in the position where it can be engaged with the hook of switch box 3 The decoration panel is attached with 4 mounting screws Remove the two fixing screws at the switch box side first 4 Loosen the other two screws by approx 10 mm The decoration panel is hung with these two fixing screws and the provisional han...

Page 244: ...35 50 60BV1B Removal Procedure 233 5 Turn the provisional hanger to disengage it from the hook of switch box and slide the decoration panel in the arrow direction to remove the panel Step Procedure Points S2640 S2641 ...

Page 245: ... of black sealing material of discharge port in part Peel not the anti sweat material but only sealing material of discharge port Note When restore the sealing material of discharge port be careful that no clearance exists between padding and sealing material as original installation Otherwise due dripping may occur due to leakage of cool air 3 Remove the two screws for each bearing of horizontal ...

Page 246: ...Si21 205 FFQ25 35 50 60BV1B Removal Procedure 235 4 Remove the horizontal vane Step Procedure Points S2646 ...

Page 247: ... manually and turn up the panel side gear to disengage the motor side gear 5 Remove the swing motor Precaution during swing motor installation 1 Engage the swing motor side gear with the panel side one Otherwise faulty swinging operation or abnormal noise may be caused Install the motor after checking of correct gear engagement 2 Install the swing motor in reverse process of removal procedure When...

Page 248: ... to the capacitor for fan motor Refer to the list shown in the right 4 Cut tie wraps fixing lead wires of float switch thermistor for heating and liquid pipe thermistor 5 Remove two fixing screws located at both ends of switch box and one screw inside the box 6 Remove the switch box Five pieces lead wires shown below connect to the PCB and lead wire connected to the capacitor for fan motor X15A Le...

Page 249: ...nt misjudgment with switch box fixing position 1 Removing the fan rotor 1 Remove the resin nut and rotation stopper to dismount the fan rotor For removal of switch box refer to the 1 6 Removal of Switch Box on page 237 2 Remove the resin nut with spanner 3 Pull down the fan rotor slowly 4 Make sure to hold the hub as shown in Fig 1 when tightening or loosening the fan fixing nut with a spanner To ...

Page 250: ...Removal Procedure 239 2 Removing the fan motor 1 Disconnect the harness connector for motor from the motor 2 Remove the three washer faced bolts 3 Pull down the fan motor slowly Step Procedure Points Washer faced bolt S2656 S2657 ...

Page 251: ...dure Points 1 Remove the drain socket to drain water from the drain hole 2 Remove the 4 mounting screws to remove the drain pan Remove the drain socket to drain water from the drain hole If water is in the drain pan it can spill and wet the floor Drain water completely or cover the floor with a vinyl sheet before removing the drain pan 3 Pull down the drain pan straight down Drain socket S2658 S26...

Page 252: ...ews fixing float switch ass y Screw and 2 Remove the float switch ass y Remove the float switch before removing drain pump in order to prevent the float switch from damage 3 Cut the tie wrap fixing the drain hose Remove the screw When pulling out the drain hose be sure to wear safety gloves to prevent your finger from injury with heat exchanger fin 4 Pull out the drain hose 5 Remove the drain pump...

Page 253: ...y with screw and insert the drain hose 2 Insert the drain hose into the hose plug of the drain pump up to the root of plug securely Inserting the drain hose should be executed before installation of float switch in order to prevent the float switch from damage Put the tie wrap on the white line on the hose inserted When inserting the drain hose be sure to wear safety gloves to prevent your finger ...

Page 254: ...drain pump together with the float switch with screw and Step Procedure Points S2661 Wiring groove Lead wires ScrewR ScrewS S2669 When install the drain pan put the lead wires of float switch and drain pump in wiring groove and pass the lead wires above on the black sealing material on the drain pan Otherwise due dripping may occur due to leakage of cool air ...

Page 255: ...ure Points 1 Disconnect the grounding terminal from the header 2 Pull apart the thermistor ass y and motor lead wire from the clamps 3 Pull out the thermistor from the slit of heat exchanger partition plate 4 Remove two screws to the top panel then pull the partition plate of heat exchanger downward S2670 Clamp Clamps Fan motor lead wire Thermistor ass y Slit S2671 S2672 Heat exchanger partition p...

Page 256: ...at resistance tie wrap when installing new thermistor Heat resistance tie wrap Parts No 1278921 Drg No 4SA90202 1 6 Pull out the thermistor from the insertion pipe Thermistor for heating The upper one wrapped with a yellow tape Thermistor for liquid pipe The lower one without taping Replace thermistor as an ass y Two thermistors are bound with special heat resistance tube Step Procedure Points S26...

Page 257: ...at exchanger 1 Remove the refrigerant pipe after completion of refrigerant collection and pump down operation This work should be performed with two personnel including one person for supporting the heat exchanger to avoid falling down during the work 2 Remove the fixing plate of heat exchanger 3 Remove the pipe fixing plate mounted with two screws 4 Remove the heat exchanger S2675 Heat exchanger ...

Page 258: ...e external plate securely 3 Install the heat exchanger mounting plate 4 Insert two thermistors Then cover the header by anti sweat tube Set the lead wire with yellow tape for heating upper side while that with no tape for liquid lower side Step Procedure Points Groove of ceiling polystyrene foam Polystyrene partition plate for heat exchanger tube plate S2678 Bring the heat exchanger tube plate sec...

Page 259: ...changer partition plate inside and fix them with two screws 7 Pass the thermistor ass y through the clamps and the slit of partition plate securely as the original state Pass the lead wire of motor also through the clamp securely 8 Insert the grounding terminal to the header Step Procedure Points S2673 Anti sweat tube S2672 Heat exchanger partition plate Fan motor lead wire Clamp Clamps Slit of pa...

Page 260: ...r into the wiring groove securely as they were taking care that the wires do not contact with fan rotor 11 Tighten the two screws to install the bell mouth Bell mouth is formed with step A convex protrusion is provided at the position of bell mouth fixing screw to prevent misjudgment with switch box fixing position 12 Install the switch box with two M4 screws and one M5 screw For installation of t...

Page 261: ...ure thermistor X19A High tension cable of transformer X11A Low tension cable of transformer X10A Outdoor unit connection wire X27A Fan motor lead wire X20A Lead wire of remote controller X5A Lead wire of drain pump X25A Lead wire of liquid pipe thermistor X18A Lead wire of swing motor X36A Refer to the item 3 below Lead wire of thermistor for heating X17A Lead wire of float switch X15A Lead wire o...

Page 262: ...hermistor to the switch box by using tie wrap Use tie wrap properly to prevent the wire from contact with hot part of the PC board Inserttherubberbushing of air temperature thermistor into the slit of switch box Then check that it is connected to the connector X19A Step Procedure Points P1P2F1F2 X10A X36A X5A X11A X27A Hooking claws for mounting PC board Three locations Fixing claws for the PC boa...

Page 263: ...ith a hot part on the PC board 3 Installing the decoration panel 1 Put the two holes on the decoration panel to the panel mounting screws and slide the panel turn the stoppers to prevent the panel from falling down then install the remainder two screws When installing the decoration panel be careful not to catch the lead wire 2 Insert the lead wires of swing flap to the connector on the PC board 3...

Page 264: ...xing transmission parts box and harness and disconnect the connector X1A 3 Disconnect the lead wire of the transmission parts box from the connector X24A on the indoor unit PC board 4 Removing the decoration panel Refer to the Removal of Decoration Panel 5 Pull out the lead wire of receiver section from wiring groove 6 Push three claws on the rear side of panel to remove the corner cover receiver ...

Page 265: ...switches Set the dip switches with same conditions as those of the transmission parts box removed For details of setting refer to the instruction manual of wireless remote controller kit 6 Mount the transmission parts box with two screws after checking that the tie wrap is in the fixing position and the lead wire is caught with fixing part of tie wrap and can not come out 7 Insert the lead wire fr...

Page 266: ...0 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Push the 2 tabs and open the suction grilles 2 Push the air filter installation panel from 2 places in the direction of the arrow and pull the air filter out toward yourself 3 Grip the suction grille hinge strongly and remove the suction grille ...

Page 267: ...minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Loosen the 2 screws of the control box cover and remove the control box cover 2 Remove the 2 screws of the control box 3 Pull down the control box and let it hang by the 2 locations in the rear Electrical parts can now be removed ...

Page 268: ...B Removal Procedure 257 4 Disconnect the connector mounted on the PC board 5 Remove the PC board installation screw 6 Slide the PC board to the left away from the tabs on the right and remove the PC board Step Procedure Points ...

Page 269: ...d detach the center shaft Two shafts provided on Types 140 and 160 2 Then gently bend the center of the horizontal blade and take both the end shafts out of their bearings When removing the horizontal blade from the bearings at both ends be careful not to get the blow port thermal insulation scratched Reassembling precautions 1 The shaft at the right end of the horizontal blade is cut in D shape F...

Page 270: ...ure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Push the 2 tabs of the fan housing toward the inside with your fingers and pull out the fan housing 2 Loosen the 2 hexagon set screws of the intermediate bearing ...

Page 271: ...r Slide the glass tube and get the connector exposed connectors Connector 1 handles high voltage 220 240 V so be sure to turn of the power supply before disconnecting 5 Disconnect the 2 fan motor connecting connectors 6 Remove the 2 fan motor fasteners 7 Remove the fan motor Finally reconnect the fan motor connector cover it with the glass tube and secure it with the tie wrap Step Procedure Points...

Page 272: ... off all power supplies before disassembling work Step Procedure Points Remove the fan rotor according to the procedures for removing the fan rotor and fan motor 1 Remove the left side panel installation screw 2 Slide the left side panel toward the front of the unit and remove 3 Remove the 2 bearing installation screws and remove the bearing ...

Page 273: ...edure Points 1 Remove the 7 bottom panel installation screws 2 each on the left and right 3 in the rear and remove the bottom panel Remove the rear surface screws 2 each on the left and right and remove the center screw while supporting the bottom panel from underneath 2 Let down the rear of the bottom panel push out toward the front removed from the hooking part and remove 3 Remove the drain pan ...

Page 274: ...ight side panel Slide the right side panel toward the front and detach it 2 Cut off the tie wrap of the swing motor connector 3 Disconnect the connector from the swing motor connector 4 Remove the screw from the swing motor The swing motor has two projections on it Lower the swing motor and take it out When reassembling fit the horizontal blade shaft end to the D profiled bearing Apply the tie wra...

Page 275: ... hooks are provided slide the cover downward to remove The forced cooling operation in the pumping down mode can be carried out by pushing the operation switch on the main unit for five seconds The existing models can do it through the switch on the PC board just as well The layout of the connection ports for the flares has been changed to horizontal position from vertical position 2 The top plate...

Page 276: ... remove it forward The left side plate and the bellmouth can be removed all at once When restoring the top plate move it horizontally and get it down for the easy work 5 The front plate and the left side plate can be removed when the one fixed screw is removed Sectional view at the front Step Procedure Points Top plate Left side plate The edge of the top plate gets into this groove R1737 ...

Page 277: ...upplies before disassembling work Step Procedure Points 1 The bellmouth is attached to the front plate with two screws and four hooks Remove the bellmouth from the front plate after removing the two screws which are set below 2 Remove the two screws and undo the four hooks to release the bellmouth Slide the bellmouth in the arrow direction to disengage the hook B ...

Page 278: ... 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the shelter The shelter has five hooks Be sure to avoid forgetting to restore the shelter and to avoid losing or damaging it 1 Undo the five hooks and remove the shelter 2 Remove the PCB 1 Disconnect the ground wire ...

Page 279: ...cedure 2 Remove the four screws fixing the PCB 3 Disconnect the six wire harness 4 Disconnect the two connectors of the reactor There is another reactor located on bottom frame Fasten clamp materials as before when re assembling Step Procedure Points ...

Page 280: ...Si21 205 Outdoor Unit 25 35 class Removal Procedure 269 5 Undo the eight hooks and the PCB can be disengaged The PCB has eight hooks 6 Disconnect the three wires from the PCB Step Procedure Points ...

Page 281: ...Outdoor Unit 25 35 class Si21 205 270 Removal Procedure 7 The PCB can completely be released 3 Remove the electrical box 1 Remove the two screws fixing the electrical box Step Procedure Points ...

Page 282: ...Si21 205 Outdoor Unit 25 35 class Removal Procedure 271 2 Lift and remove the electrical box 4 Remove the molded interconnect device MID 1 Remove the one screw fixing the MID Step Procedure Points ...

Page 283: ...Outdoor Unit 25 35 class Si21 205 272 Removal Procedure 2 Slide the MID upward and release Step Procedure Points ...

Page 284: ...e electric parts Be sure to avoid forgetting to restore the shelter and to avoid losing or damaging it When restoring match the mark of the propeller fan with the D cut of the motor shaft The fan should be restored so that the mark will be at upper part of the fan motor 1 Release the lead wires of the fan motor from the groove of the switch box 2 The propeller fan can be removed when the washer fa...

Page 285: ...Outdoor Unit 25 35 class Si21 205 274 Removal Procedure 4 Remove the fan motor Step Procedure Points ...

Page 286: ...ate 1 Remove the three screws for removing the right side plate 2 Lift the right side plate to disengage the hooks Insert the three hooks for the restoration 2 Remove the noise absorber Since the slit prepared for the piping connection on the noise absorption pad is torn easily remove the pad carefully When restoring the noise absorption pad should pass the internal side of the piping 1 Untie the ...

Page 287: ...ody 3 Pull out the top pad of the noise absorption a Since the slit prepared for the piping on the noise absorption pad is torn easily remove the pad carefully 4 Pull out the noise absorption pad b When restoring the noise absorption pad should pass the internal side of the piping Step Procedure Points ...

Page 288: ...n Plate and Reactor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the partition plate 1 Remove the two screws fixing the partition plate 2 Pull the partition plate upward to remove ...

Page 289: ...estoring the partition plate fit the hook into the bottom frame 2 Remove the reactor 1 The reactor can be released by removing the fixed screw 3 Remove the reactor assembly 1 Remove the one screw fixing the reactor assembly to the bottom frame Step Procedure Points ...

Page 290: ...Si21 205 Outdoor Unit 25 35 class Removal Procedure 279 2 Slide the reactor assembly this side and release Step Procedure Points ...

Page 291: ...d the lead wires of the compressor so as not to be burnt out by a gas brazing machine 2 Remove the thermistor for the heat exchanger The thermistor for the heat exchanger is fixed by a clamp material at one portion Be sure to fix the thermistor back on the original position when restoring Warning Ventilate when the refrigerant leaks during the work If the refrigerant is exposed to the fire it will...

Page 292: ... required to prevent the carbonization of the oil inside the four way valve and the deterioration of the gaskets affected by heat For the sake of this wrap the four way valve with wet cloth and make up water so that the cloth will not be dried and avoid excessive heating It keeps below 120 C Be careful so as not to break pipes by pressing the pipes excessively by pliers when withdrawing the piping...

Page 293: ...e copper tube cutter in order to make it easy to remove NOTE Don t use a metal saw for cutting pipes by all means because the chips come into the circuit 8 Heat up the two portions of brazing parts on the motor valve and remove Cautions at the restoration Wrap the motor valve with wet cloth and make up water so that the cloth will not be dried and avoid excessive heating Caution Be careful about f...

Page 294: ...tes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the parts around the compressor Be careful so as not to burn the compressor terminals or the name plate 1 Remove the terminal cover and the lead wires of the compressor so as not to be burnt out by a gas brazing machine ...

Page 295: ... Si21 205 284 Removal Procedure 2 The mounting nut for the compressor is only one piece Remove the four way valve and the motor valve also so as not to be burnt out 3 Remove the nut by an open end wrench Step Procedure Points ...

Page 296: ...e work If the refrigerant is exposed to the fire it will cause toxic gas Caution Be careful about pipes and so on which were heated up by a gas brazing machine so as not to get burnt on your hands Pay attention so that the fins of the heat exchanger will not be burnt Be sure to apply nitrogen s replacement when heating up the brazing part 1 Remove the brazing part on the discharge side of the comp...

Page 297: ... Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the panels and plates Take care not to cut your finger by the fins of the heat exchanger 1 Loosen the four screws and lift the top panel 2 Loosen the four screws and remove the discharge grille ...

Page 298: ...val Procedure 287 The front grille has four claws Slide the discharge grille upwards and remove it 3 Loosen the six screws of the front panel 4 Push the front panel and undo the claw Lift the clamp plate and remove it Step Procedure Points ...

Page 299: ...t side claw and then the left side claws Remove the front panel Lift the front panel and remove it while pushing the right side panel inwards Lift the front panel and undo the left side claws Fit the left side of the front panel first when installing Step Procedure Points ...

Page 300: ... class Removal Procedure 289 2 Remove the stop valve cover 1 Loosen the screw of the stop valve cover 2 Pull down the stop valve cover to undo the claws and remove it The stop valve cover has six claws Step Procedure Points R2687 ...

Page 301: ...mbling work Step Procedure Points Remove the top panel and the front panel 1 Remove the electrical box cover This procedure is not necessary to remove the propeller fan only 1 Loosen the screw on the back of the shelter 2 Undo the two claws and remove it The claws have been released since the front panel was removed 3 Release the four claws of the electrical box cover and remove it R2688 Shelter C...

Page 302: ... 205 Outdoor Unit 50 60 class Removal Procedure 291 2 Remove the fan motor 1 Disconnect the connector for fan motor S70 2 The illustration shows arrangement of the fan motor lead wire Step Procedure Points ...

Page 303: ...moval Procedure 3 Unscrew the washer fitted nut M10 of the propeller fan with a spanner Align mark of the propeller fan with D cut section of the motor shaft when reassembling 4 Remove the four screws from the fan motor Step Procedure Points ...

Page 304: ...tdoor Unit 50 60 class Removal Procedure 293 5 Pull the fan motor out Put the lead wire through the back of the motor when reassembling so as not to be entangled with the propeller fan Step Procedure Points R2697 ...

Page 305: ... before disassembling work Step Procedure Points Remove the top panel and the front panel 1 Remove the right side panel Terminal strip number black 1 power supply white 2 power supply red 3 transmission yellow green earth 1 Disconnect the three connection wirings and the two earth wires 2 Loosen the three screws of the right side panel 3 Loosen the fixing screw of the electrical box ...

Page 306: ... of the lower part and the one claw of the upper back when reassembling 2 Disconnect harnesses 1 Loosen the fixing screw of the cable way board Service monitor PCB Step Procedure Points R2701 Claw S52 SW1 A B C LEDA Green SW4 Initial setting OFF LED A Green ON SW4 S102 S2 R2704 ...

Page 307: ...minal strip HE2 yellow green to the terminal strip earth HAC1 black from the control PCB AC1 HE1 yellow green from the control PCB E Power supply PCB 4 Disconnect the connectors of the front side S20 electronic expansion valve S40 overload protector S80 four way valve S90 thermistors discharge pipe outdoor air heat exchanger Step Procedure Points HE1 V3 varistor soldered HE2 HL FU1 250V 30A HAC1 R...

Page 308: ...do the two claws and release the control PCB from the ditch of the front side 7 Disconnect the harnesses while opening the control PCB S10 to the terminal strip AC2 to the terminal strip 8 Disconnect the connectors S51 to the service monitor PCB S101 to the service monitor PCB Step Procedure Points ...

Page 309: ... outdoor unit S10 to the terminal strip S20 electronic expansion valve S31 to CN14 of the SPM S32 to CN11 of the SPM S33 to S34 of the MID S40 overload protector S51 to S52 of the service monitor PCB S71 to S72 of the MID S80 four way valve S90 thermistors discharge pipe outdoor air heat exchanger S91 fin thermistor S101 to S102 of the service monitor PCB Step Procedure Points ...

Page 310: ... 205 Outdoor Unit 50 60 class Removal Procedure 299 11 Disconnect the relaying wire connector for the compressor 12 Release the clamp by pliers 13 Disconnect the reactor harness Step Procedure Points R2715 ...

Page 311: ...oor Unit 50 60 class Si21 205 300 Removal Procedure 14 Pull the clamp and draw the thermistor harness out from the back of the electrical box 15 Loosen the screw of the electrical box Step Procedure Points ...

Page 312: ...Si21 205 Outdoor Unit 50 60 class Removal Procedure 301 16 Release the clamp of the four way valve harness 17 Lift the electrical box and remove it Step Procedure Points R2720 ...

Page 313: ... wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points Remove the electrical box 1 Remove the partition plate 1 Release the clamp by pliers 2 Loosen the two screws of the partition plate The partition plate is fixed to the bottom frame with a claw R2724 Claw ...

Page 314: ...Si21 205 Outdoor Unit 50 60 class Removal Procedure 303 3 Lift the partition plate and remove it 4 Loosen the screw Slide the reactor and remove it from the partition plate Step Procedure Points ...

Page 315: ...s before disassembling work Step Procedure Points 1 Disconnect the harness of each thermistor 2 Release the discharge pipe thermistor Pay attention to the direction of the clip so as not to touch the lead wire of the thermistor when reassembling 3 Cut the clamp by nippers Disconnect the outdoor heat exchanger thermistor Clamps should be always available Fix it as it was before ...

Page 316: ...rts on the sound blanket side outer are torn easily remove the blanket carefully 5 Remove the sound blanket top upper 6 Remove the sound blanket top lower 7 Remove the sound blanket side inner Since the piping ports on the sound blanket side inner are torn easily remove the blanket carefully Step Procedure Points ...

Page 317: ...dation brazing Braze it quickly when no nitrogen gas can be used 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 For the sake of this wrap the four way valve with wet cloth and provide water so that the cloth will not be dried and avoid excessive heating Keep below 120 C In case of the difficulty with gas braz...

Page 318: ...ets of putty Before working make sure that the refrigerant is empty in the circuit 3 Heat up the two brazed parts of the electronic expansion valve and disconnect Be sure to apply nitrogen replacement when heating up the brazed part Caution Be careful about the electronic expansion valve pipes and so on which were heated up by a gas brazing machine so as not to get burnt your hands Warning Ventila...

Page 319: ...re to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the terminal cover 2 Disconnect the lead wires of the compressor Be careful so as not to burn the compressor terminals or the name plate Make a note U red V yellow W blue N brown N W U V ...

Page 320: ...toxic gas Provide a protective sheet or a steel plate so that the brazing flame cannot influence peripheries Be careful so as not to burn the compressor terminals or the name plate 5 Heat up the brazed part of the discharge side and disconnect 6 Heat up the brazed part of the suction side and disconnect Be careful so as not to burn the heat exchanger fin Warning Since it may happen that refrigerat...

Page 321: ...Outdoor Unit 50 60 class Si21 205 310 Removal Procedure ...

Page 322: ... Appendix 1 Piping Diagrams 312 1 1 Indoor Units 312 1 2 Outdoor Units 25 35 class 313 1 3 Outdoor Units 50 60 class 315 2 Wiring Diagrams 317 2 1 Indoor Units 317 2 2 Outdoor Units 25 35 class 319 2 3 Outdoor Units 50 60 class 320 ...

Page 323: ...B 9 5 12 7 Outdoor unit To 6 4 6 4 MODEL FFQ50 60BV1B FFQ25 35BV1B Field piping φ C1220T O Field piping φ C1220T O Indoor unit Indoor heat exchanger 4D039335 Indoor heat exchanger Indoor unit Field piping φ C1220T O Field piping φ C1220T O FHQ35BUV1B FHQ50 60BUV1B MODEL 6 4 6 4 To Outdoor unit 12 7 9 5 4D037995 ...

Page 324: ...TED MUFFLER 9 5CuT 6 4CuT MUFFLER MUFFLER 6 4CuT 6 4CuT FILTER FILTER WITH WITH VALVE LIQUID STOP VALVE GAS STOP FIELD PIPING FIELD PIPING 6 4CuT 9 5CuT 3D039303 MUFFLER 7 9CuT THERMISTOR DISCHARGE PIPE 7 9CuT 7 9CuT OUTDOOR UNIT 7 9CuT PROPELLER FAN HEAT EXCHANGER M COMPRESSOR 7 9CuT HEAT EXCHANGER THERMISTOR ACCUMLATOR OUTDOOR TEMPERATURE THERMISTOR 6 4CuT MUFFLER FILTER WITH 9 5CuT REFRIGERANT ...

Page 325: ...CuT 6 4CuT FILTER FILTER LIQUID RECEIVER WITH WITH VALVE LIQUID STOP VALVE GAS STOP FIELD PIPING FIELD PIPING 6 4CuT 9 5CuT 3D039301 OUTDOOR UNIT 9 5CuT 7 9CuT 7 9CuT THERMISTOR DISCHARGE PIPE OUTDOOR UNIT MUFFLER HEAT EXCHANGER 7 9CuT M COMPRESSOR VALVE FOUR WAY ON COOLING 9 5CuT PROPELLER FAN 7 9CuT HEAT EXCHANER THERMISTOR ACCUMLATOR OUTDOOR TEMPARATURE THERMISTOR 6 4CuT MUFFLER FILTER WITH 9 5...

Page 326: ...TOP VALVE VALVE MOTOR OPERATED STOP VALVE LIQUID FIELD PIPING FIELD PIPING REFRIGERANT FLOW 12 7CuT 6 4CuT COOLING 3D037835A OUTDOOR UNIT 9 5CuT 12 7CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT DISCHARGE PIPE THERMISTOR EXCHANGER THERMISTOR HEAT PROPELLER FAN M HEAT EXCHANGER COMPRESSOR 12 7CuT OUTDOOR AIR TEMPERATURE 7 9CuT 7 9CuT 7 9CuT 7 9CuT THERMISTOR ACCUMLATOR CAPILLARY TUBE ...

Page 327: ...STOP VALVE LIQUID FIELD PIPING FIELD PIPING REFRIGERANT FLOW 12 7 CuT 6 4 CuT HEATING COOLING 3D034262C OUTDOOR UNIT 12 7CuT 12 7CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT DISCHARGE PIPE THERMISTOR EXCHANGER THERMISTOR HEAT PROPELLER FAN MUFFLER M HEAT EXCHANGER 7 9CuT 7 9CuT VALVE FOUR WAY COMPRESSOR ON HEATING 12 7CuT 12 7CuT 12 7CuT OUTDOOR AIR TEMPERATURE 7 9CuT 7 9CuT 7 9CuT 7 9CuT ...

Page 328: ... MAGNETIC RELAY M1P PRINTED CIRCUIT BOARD PRINTED CIRCUIT BOARD TERMINAL STRIP TERMINAL STRIP FUSE F5A 250V MOTOR SWING FLAP MOTOR DRAIN PUMP MOTOR INDOOR FAN CAPACITOR M1F THERMISTOR AIR THERMISTOR AIR THERMISTOR COIL 2 THERMISTOR COIL 1 REMOTE CONTROLLER SLAVE INDOOR UNIT X2M 3 2 1 NOTE 3 X24A CONNECTOR A1P TO OUTDOOR RECEIVER DISPLAY UNIT H05VV U4G2 5 UNIT A3P BS1 SS1 SS2 X40A X60A X61A X33A X3...

Page 329: ...UIT BOARD PRINTED CIRCUIT BOARD TERMINAL BLOCK TERMINAL BLOCK FUSE F5A 250V MOTOR SWING FLAP LIMIT SWITCH SWING FLAP MOTOR INDOOR FAN CAPACITOR M1F THERMISTOR AIR THERMISTOR AIR THERMISTOR COIL 2 THERMISTOR COIL 1 3 2 1 REMOTE CONTROLLER CONNECTOR SLAVE INDOOR UNIT X2M 3 2 1 NOTE 4 X24A A1P TO OUTDOOR BS1 SS1 SS2 X15A X25A X60A X61A X33A X35A X40A H1P H2P H3P H4P RECEIVER DISPLAY UNIT H05VV U4G2 5...

Page 330: ...L R4T BLK S91 FIN BLK OL1 C15 C14 GRY GRY N BRN BRN W N W 3D038018A M1C W TRM1 BLU BLU V U V YLW V YLW U U Z1C RED RED 1 NOTE N L 1 REFER TO THE NAMEPLATE FOR THE POWER REQUIREMENTS 2 IF THE REFRIGERANT PIPING EXCEEDS 15M FIELD WIRING L LIVE CUT THE LEAD LINE MARKED J7 ON PCB X1M TERMINAL STRIP CT1 CURRENT TRANSFORMER L1 COIL PCB1 PRINTED CIRCUIT BOARD C12 C15 CAPACITOR L1R REACTOR M1C COMPRESSOR ...

Page 331: ...N 7 1 8 RED S33 S34 YLW WHT BLU RED BRN ORG RED BRN BLU YLW X11A 10 10 BLU YLW BRN BLU RED 1 3D037866D GRY V S40 1 3 M1F M1C M M BLK 4 W U Q1L BLK N 60Hz 220 230V 50Hz 220 240V FIELD WIRING TO INDOOR UNIT POWER SUPPLY N L 2 3 1 V2 V5 VARISTOR MRC W MAGNETIC RELAY Y2E ELECTRONIC EXPANSION VALVE E AC1 AC2 Z1C Z2C FERRITE CORE MRM10 MRM20 R1T R3T THERMISTOR X1M TERMINAL STRIP H1 H2 HL L1 L2 X11A CONN...

Page 332: ...erter units refrigerant system check 225 main circuit electrolytic capacitor check 227 outdoor unit fan system check with DC motor 224 power supply waveforms check 225 power transistor check 226 thermistor resistance check 222 turning speed pulse input on the outdoor unit PCB check 227 CJ 155 clamp plate 287 CN11 298 CN14 298 compressor 283 309 compressor lock 165 196 compressor overload 164 195 c...

Page 333: ... 221 four way valve switching 91 107 freeze up protection control 76 93 109 frequency control 89 105 front panel 287 front plate 264 function outline 74 functions list of 6 H H6 170 203 H8 171 204 H9 173 206 HAC1 296 hall IC check 194 HE1 296 HE2 296 heat exchanger 246 286 heat exchanger thermistor function 25 35 class 86 87 function 50 60 class 102 103 removal procedure FFQ model 244 removal proc...

Page 334: ...rload 100 115 164 195 over voltage detection 183 P P4 173 206 partition plate 277 302 PI control 90 106 piping diagrams 312 piping work drain FFQ model 37 drain FHQ model 47 refrigerant FFQ model 35 refrigerant FHQ model 44 position sensor abnormality 170 203 power supply PCB 69 296 power supply waveforms check 192 225 power transistor check 193 226 preheating operation 91 107 printed circuit boar...

Page 335: ...mistor resistance check 163 189 222 thermostat control 76 top panel 286 top plate 264 transmission error between indoor and outdoor unit 156 between indoor unit and remote controller 157 between main and sub remote controller 158 troubleshooting based on equipment condition After shutting down equipment does not restart for a while 124 Cooling heating operation starts but stops immediately 123 Equ...

Page 336: ...r unit fan motor lock 146 indoor unit PCB FFQ B 65 indoor unit PCB FHQ B 66 input current control 92 108 input over current detection 166 198 INSPECTION TEST button 133 installation condition check 190 223 insufficient gas 181 214 insufficient gas control 100 115 inverter units refrigerant system check 192 225 L low Hz high pressure limit 111 low voltage detection 216 M main circuit electrolytic c...

Page 337: ...2 thermostat control 76 transmission error between indoor and outdoor unit 156 between indoor unit and remote controller 157 between main and sub remote controller 158 troubleshooting based on equipment condition after shutting down equipment does not restart for a while 124 cooling heating operation starts but stops immediately 123 equipment discharges dust 130 equipment discharges white mist 128...

Page 338: ...g and improving the quality of the environment Daikin Europe N V is approved by LRQA for its Quality Management System in accordance with the ISO9001 standard ISO9001 pertains to quality assurance regarding design development manufacturing as well as to services related to the product Daikin units comply with the European regulations that guarantee the safety of the product Zandvoordestraat 300 B ...

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