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Daikin SUPER MULTI NX CDXS18LVJU, Service Manual

The Daikin SUPER MULTI NX CDXS18LVJU is a high-performance air conditioning unit designed to provide optimal comfort. Its installation manual, available for free download at manualshive.com, offers step-by-step instructions to ensure hassle-free setup. Get ready to experience the pinnacle of cooling technology with this user-friendly manual at your fingertips.

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Wiring Diagrams

SiUS12-928_B

277

Appendix

4MXS32GVJU

o

u

tdoor

FIELD 

W

IRI

N

G

indoor

MRM10

4

RED

Y1R

S

8

0

MRM20

6

1

V

3

V

5

RED

(R

OOM-D)

GR

N

GR

Y

U

W

HT

10

M

<GAS PIPE>

PM1

(CO

N

DE

N

SER)

ROOM D

L2

FU2

1

BR

N

A

R4T

R1T

M

GR

Y

3.15A

W

HT

2

BLU

RED

1

5

1

YL

W

4

Z6C

M

BLU

ORG

M1C

YL

W

W

HT

RED

R3T

W

HT

Y1E

Z3C

BLU

S92

W

X1M

BR

N

2

BR

N

8

ROOM B

RED

BLU

6

3

~

S52

1

BLU

4

1

2

RED

S23

AC2

C

(R

OOM-D)

ROOM C

A

ORG

S

W

1

BLU

V

BLU

RED

BLU

X4M

X2M

D

4

BLU

S90

2

(R

OOM-C)

E1

7

BLU

1

(R

OOM-A)

BLU

6

2

1

W

HT

BLK

7(

N

)

3.15A

GR

Y

1

S

W

4

RED

GR

N

L1R

2

3

1

1

BLU

HR2

BLK

BLU

HR1

12

RED

1

BLU

Z1C

RED

RED

BLK

E2

W

HT

BLK

TO I

N

DOOR U

N

IT

S101

V

2

PCB2

Z2C

3

6(P)

YL

W

1

1

1

5

2

S51

BR

N

1

GR

N

YL

W

1

YL

W

1

S102

BLK

R2T

R9T

BLU

U

ORG

S21

BLK

BR

N

(OUTDOOR)

5

3

LED

Q1L

1

W

HT

(R

OOM-B)

3

6

3

BLK

BLK

W

B

(R

OOM-C)

S70

BLU

1

W

HT

S15

3

S22

S20

9

(R

OOM-A)

Z5C

S2

R6T

3

12

W

HT

C

3

V

1

2

BLU

X5M

1

X3M

RED

BLU

YL

W

MRC

M

S40

W

(R

OOM-B)

D

S93

A

S10

X11A

BLU

6

FU3

RED

Y2E

S

W

2

M1F

V

9

3

1

3

PCB1

BLU

30A

W

HT

ORG

L2

YL

W

YL

W

R11T

ROOM A

YL

W

2

SA2

Y4E

1

YL

W

FU1

5

Y3E

Z4C

R7T

9

R10T

M

BLU

(DISCHARGE)

1

V

100

3

11

BLU

B

L1

ORG

W

HT

SHEET METAL

BLK

W

HT

BLK

ORG

6

2

BLU

S

W

3

BR

N

<LIQUID PIPE>

BLU

M

L1

BR

N

S

W

5

AC1

R

8

T

BLU

1

R5T

t°

t°

t°

t°

t°

t°

t°

t°

t°

t°

t°

+ + +

PO

W

ER SUPPLY 

~

60Hz 20

8

-230

V

Z1C

~

Z6C

X1M

~

X5M

Y1E

~

Y4E

V

2, 

V

3, 

V

5, 

V

9, 

V

100

SA2
FU1, FU2, FU3
AC1, AC2
U, 

V

, 

W

, X11A

E1, E2
HR1, HR2

: FERRITE CORE
: TERMI

N

AL STRIP

: ELECTRO

N

IC EXPA

N

SIO

N

 

V

AL

V

E COIL

: 

V

ARISTOR

: SURGE ARRESTER
: FUSE

: CO

NN

ECTOR

MRM10, MRM20
MRC/

W

R1T

~

R3T

R4T

~

R7T

R

8

T

~

R11T

S2

~

S102

LED1

~

LED5

LEDA

: MAG

N

ETIC RELAY

: THERMISTOR
: CO

NN

ECTOR

: PILOT LAMP

L1, L2
S

W

1

S

W

2

S

W

3

S

W

4

S

W

5

: LI

V

E

: FORCED OPERATIO

N

 O

N

/OFF S

W

 (S

W

1)

: SELECT S

W

 (S

W

2)

: 

W

IRI

N

G ERROR CHECK S

W

 (S

W

3)

: PRIORITY ROOM SETTI

N

G S

W

 (S

W

4)

: 

N

IGHT QUIET MODE SETTI

N

G S

W

 (S

W

5)

M1C
M1F
L1R
Q1L
PM1
PCB1, 2
Y1R
SHEET METAL

: COMPRESSOR MOTOR
: FA

N

 MOTOR

: REACTOR
: O

V

ERLOAD PROTECTOR

: PO

W

ER MODULE

: PRI

N

TED CIRCUIT BOARD

: FOUR-

W

AY 

V

AL

V

E COIL

: TERMI

N

AL STRIP FIXED PLATE

3D05

8

397

Summary of Contents for SUPER MULTI NX CDXS18LVJU

Page 1: ...Service Manual G Series J Series SiUS12 928_B Applied Models Inverter Multi Heat Pump ...

Page 2: ...S09LVJU FTXS15HVJU FTXS15LVJU FDXS12LVJU FTXS18HVJU FTXS18LVJU CDXS15LVJU CDXS18LVJU Outdoor Unit 2MXS18GVJU 3MXS24JVJU 4MXS32GVJU 1 Safety Considerations vii 1 1 Safety Considerations for Repair vii 1 2 Safety Considerations for Users viii Part 1 List of Functions 1 1 Functions 2 Part 2 Specifications 7 1 Indoor Unit 8 2 Outdoor Unit 13 Part 3 Printed Circuit Board Connector Wiring Diagram 16 ...

Page 3: ... NIGHT SET Mode 44 1 9 ECONO Operation 45 1 10 HOME LEAVE Operation 46 1 11 INTELLIGENT EYE Operation CTXS FTXS Series 47 1 12 Inverter POWERFUL Operation 48 1 13 Other Functions 49 2 Function of Thermistor 51 3 Control Specification 54 3 1 Mode Hierarchy 54 3 2 Frequency Control 55 3 3 Controls at Mode Changing Start up 57 3 4 Discharge Pipe Temperature Control 58 3 5 Input Current Control 59 3 6...

Page 4: ...ER Operation 100 3 9 ON TIMER Operation 101 3 10 WEEKLY TIMER Operation 102 3 11 Note for Multi System 108 3 12 Quick Reference 110 4 FDXS D Series 111 4 1 Remote Controller 111 4 2 AUTO DRY COOL HEAT FAN Operation 112 4 3 POWERFUL Operation 114 4 4 OUTDOOR UNIT QUIET Operation 115 4 5 HOME LEAVE Operation 116 4 6 TIMER Operation 118 5 CDXS L FDXS L Series 120 5 1 Remote Controller 120 5 2 AUTO DR...

Page 5: ... 6 Outdoor Unit PCB Abnormality 24 32 Class Only 165 6 7 OL Activation Compressor Overload 166 6 8 Compressor Lock 167 6 9 DC Fan Lock 168 6 10 Input Overcurrent Detection 169 6 11 Four Way Valve Abnormality 18 Class Only 170 6 12 Discharge Pipe Temperature Control 172 6 13 High Pressure Control in Cooling 173 6 14 Compressor Sensor System Abnormality 24 32 Class Only 174 6 15 Position Sensor Abno...

Page 6: ...3MXS24JVJU 4MXS32GVJU 222 2 1 Removal of Outer Panels 222 2 2 Removal of Electrical Box 234 2 3 Removal of PCBs 240 2 4 Removal of Fan Motor 244 2 5 Removal of Coils Thermistors 245 2 6 Removal of Sound Blankets 250 2 7 Removal of Compressor 253 Part 8 Trial Operation and Field Settings 254 1 Pump Down Operation 255 2 Forced Operation 256 3 Wiring Error Check Function 257 4 Trial Operation 259 5 F...

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

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

Page 9: ...SiUS12 928_B 1 List of Functions Part 1 List of Functions 1 Functions 2 ...

Page 10: ... Reliability Durability Auto Restart after Power Failure Comfort Control Auto Fan Speed Self Diagnosis Digital LED Display Indoor Unit Quiet Operation Wiring Error Check Function NIGHT QUIET Mode Automatic Anti Corrosion Treatment of Outdoor Heat Exchanger OUTDOOR UNIT QUIET Operation Manual Flexibility Multi Split Split Type Compatible Indoor Unit INTELLIGENT EYE Operation Quick Warming Function ...

Page 11: ...ilure 3 D Airflow Self Diagnosis Digital LED Display COMFORT AIRFLOW Operation Wiring Error Check Function Comfort Control Auto Fan Speed Anticorrosion Treatment of Outdoor Heat Exchanger Indoor Unit Quiet Operation NIGHT QUIET Mode Automatic Flexibility Multi Split Split Type Compatible Indoor Unit OUTDOOR UNIT QUIET Operation Manual Flexible Power Supply Correspondence INTELLIGENT EYE Operation ...

Page 12: ...re COMFORT AIRFLOW Mode Self Diagnosis Digital LED Display Comfort Control Auto Fan Speed Wiring Error Check Function Indoor Unit Quiet Operation Anticorrosion Treatment of Outdoor Heat Exchanger NIGHT QUIET Mode Automatic OUTDOOR UNIT QUIET Operation Manual Flexibility Multi Split Split Type Compatible Indoor Unit INTELLIGENT EYE Operation Quick Warming Function Flexible Power Supply Corresponden...

Page 13: ...ure 3 D Airflow Self Diagnosis Digital LED Display COMFORT AIRFLOW Operation Wiring Error Check Function Comfort Control Auto Fan Speed Anticorrosion Treatment of Outdoor Heat Exchanger Indoor Unit Quiet Operation NIGHT SET Mode Automatic Flexibility Multi Split Split Type Compatible Indoor Unit OUTDOOR UNIT QUIET Operation Manual Flexible Power Supply Correspondence INTELLIGENT EYE Operation High...

Page 14: ...Fins Vertical Blades Wiring Error Check Function Vertical Auto Swing Up and Down Anti Corrosion Treatment of Outdoor Heat Exchanger Horizontal Auto Swing Right and Left 3 D Airflow Flexibility Multi Split Split Type Compatible Indoor Unit COMFORT AIRFLOW Operation Comfort Control Auto Fan Speed Flexible Power Supply Correspondence Indoor Unit Quiet Operation High Ceiling Application NIGHT QUIET Mo...

Page 15: ...SiUS12 928_B 7 Specifications Part 2 Specifications 1 Indoor Unit 8 2 Outdoor Unit 13 ...

Page 16: ...s 12 kBtu h Class Front Panel Color White White Airflow Rate H cfm m min 388 11 0 400 11 3 388 11 0 400 11 3 M 335 9 5 357 10 1 335 9 5 357 10 1 L 283 8 0 314 8 9 283 8 0 314 8 9 Fan Type Cross Flow Fan Cross Flow Fan Motor Output W 40 40 Speed Steps 5 Steps Quiet Auto 5 Steps Quiet Auto Air Direction Control Right Left Horizontal Downward Right Left Horizontal Downward Air Filter Removable Washab...

Page 17: ...Pressure Level H M L dB A 45 41 36 44 40 35 45 41 36 44 40 35 Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes Piping Connection Liquid in mm 1 4 6 4 1 4 6 4 Gas in mm 1 2 12 7 1 2 12 7 Drain in mm 11 16 18 0 11 16 18 0 Drawing No 3D062866A 3D062868A Model CTXS07LVJU Cooling Heating Rated Capacity 7 kBtu h Class Front Panel Color White Airflow Rate H cfm m min 332 9 4 350 9 9 M ...

Page 18: ... 4 6 4 Gas in mm 3 8 9 5 3 8 9 5 Drain in mm 5 8 16 0 5 8 16 0 Drawing No 3D075491 3D075492 Model FTXS15LVJU FTXS18LVJU Cooling Heating Cooling Heating Rated Capacity 15 kBtu h Class 18 kBtu h Class Front Panel Color White White Airflow Rate H cfm m min 568 16 1 593 16 8 583 16 5 625 17 7 M 477 13 5 505 14 3 484 13 7 526 14 9 L 385 10 9 417 11 8 385 10 9 431 12 2 SL 360 10 2 371 10 5 360 10 2 399 ...

Page 19: ...32 26 0 I D 25 32 20 0 Drawing No 3D051781A 3D051782A Model FDXS09LVJU FDXS12LVJU Cooling Heating Cooling Heating Rated Capacity 9 kBtu h Class 12 kBtu h Class External Static Pressure inAq Pa 0 12 30 0 12 30 Airflow Rate H cfm m min 305 8 6 305 8 6 305 8 6 305 8 6 M 280 7 9 280 7 9 280 7 9 280 7 9 L 260 7 4 260 7 4 260 7 4 260 7 4 SL 235 6 7 235 6 7 235 6 7 235 6 7 Fan Type Sirocco Fan Sirocco Fa...

Page 20: ...er Consumption Rated W 172 172 172 172 Power Factor Rated 94 4 94 4 94 4 94 4 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D in mm 7 7 8 35 7 16 24 7 16 200 900 620 7 7 8 35 7 16 24 7 16 200 900 620 Packaged Dimensions H W D in mm 10 1 2 43 9 16 29 9 16 266 1 106 751 10 1 2 43 9 16 29 9 16 266 1 106 751 Weight Mass Lbs kg 60 27 60 27 Gross Weight Gross Mass Lbs kg...

Page 21: ... mm 31 7 16 39 5 16 15 3 8 806 999 390 Weight Mass Lbs kg 139 63 Gross Weight Gross Mass Lbs kg 144 65 Sound Pressure Level dB A 50 51 Piping Connections Liquid in mm 1 4 2 6 4 2 Gas in mm 3 8 2 9 5 2 Drain in mm 11 16 18 0 Heat Insulation Both Liquid and Gas Pipes No of Wiring Connection 3 for Power Supply 4 for Interunit Wiring Max Interunit Piping Length ft m 164 50 for Total of Each Room 82 25...

Page 22: ... W D in mm 35 7 8 37 11 16 15 15 16 911 958 405 Weight Mass Lbs kg 168 76 Gross Weight Gross Mass Lbs kg 196 89 Sound Pressure Level dB A 52 54 Piping Connections Liquid in mm 1 4 3 6 4 3 Gas in mm 3 8 1 1 2 1 5 8 1 9 5 1 12 7 1 16 0 1 Drain in mm 1 25 Heat Insulation Both Liquid and Gas Pipes No of Wiring Connection 3 for Power Supply 4 for Interunit Wiring Max Interunit Piping Length ft m 230 70...

Page 23: ... W D in mm 35 7 8 37 11 16 15 15 16 911 958 405 Weight Mass Lbs kg 168 76 Gross Weight Gross Mass Lbs kg 196 89 Sound Pressure Level dB A 52 54 Piping Connections Liquid in mm 1 4 4 6 4 4 Gas in mm 3 8 1 1 2 1 5 8 2 9 5 1 12 7 1 16 0 2 Drain in mm 1 25 Heat Insulation Both Liquid and Gas Pipes No of Wiring Connection 3 for Power Supply 4 for Interunit Wiring Max Interunit Piping Length ft m 230 70...

Page 24: ...d Circuit Board Connector Wiring Diagram 1 Indoor Unit 17 1 1 CTXS07JVJU CTXS09 12HVJU FTXS15 18HVJU 17 1 2 CTXS07LVJU FTXS09 12LVJU 19 1 3 FTXS15 18LVJU 22 1 4 FDXS09 12DVJU 25 1 5 FDXS09 12LVJU CDXS15 18LVJU 27 2 Outdoor Unit 29 2 1 2MXS18GVJU 29 2 2 3MXS24JVJU 4MXS32GVJU 32 ...

Page 25: ...ector for buzzer PCB 6 S28 Connector for signal receiver PCB 7 S32 Connector for indoor heat exchanger thermistor 8 S35 Connector for INTELLIGENT EYE sensor PCB 9 H1 H2 H3 FG Connector for terminal board 10 JA Address setting jumper Refer to page 265 for detail 11 JB Fan speed setting when compressor stops for thermostat OFF JC Power failure recovery function auto restart Refer to page 266 for det...

Page 26: ...Detail PCB 1 Control PCB PCB 2 Signal Receiver PCB PCB 3 Buzzer PCB PCB 4 Display PCB PCB 5 INTELLIGENT EYE Sensor PCB S1 V1 FU1 S6 S8 2P099167 1 JC JB JA LED A S21 S35 H1 S26 S28 H2 H3 FG S32 SW1 S29 2P099167 1 2P099167 1 RTH1 S38 S27 LED2 LED3 S37 2P099167 1 LED1 S36 3P099913 1 ...

Page 27: ...oor heat exchanger thermistor 5 S41 Connector for swing motors 6 S46 Connector for display PCB 7 S47 Connector for signal receiver PCB 8 H1 H2 H3 FG Connector for terminal board 9 JA Address setting jumper Refer to page 265 for detail 10 JB Fan speed setting when compressor stops for thermostat OFF JC Power failure recovery function auto restart Refer to page 266 for detail 11 LED A LED for servic...

Page 28: ...SiUS12 928_B Indoor Unit Printed Circuit Board Connector Wiring Diagram 20 PCB Detail PCB 1 Control PCB V1 FU1 S1 S41 S21 S47 JB JA JC S46 S25 LED A S32 FG H1 H2 H3 2P206687 4 ...

Page 29: ...it SiUS12 928_B 21 Printed Circuit Board Connector Wiring Diagram PCB 2 Signal Receiver PCB PCB 3 Display PCB PCB 4 INTELLIGENT EYE Sensor PCB 3P210728 1 S48 3P210728 1 RTH1 SW1 S49 LED3 LED2 LED1 3EB86013 1 S26 ...

Page 30: ...eat exchanger thermistor 5 S41 Connector for swing motors 6 S46 Connector for display PCB 7 S47 Connector for signal receiver PCB 8 H1 H2 H3 FG Connector for terminal board 9 JA Address setting jumper Refer to page 265 for detail 10 JB Fan speed setting when compressor stops for thermostat OFF JC Power failure recovery function auto restart Refer to page 266 for detail 11 LED A LED for service mon...

Page 31: ...Indoor Unit SiUS12 928_B 23 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB 1 Control PCB 2P227881 6 V1 H1 H2 H3 LED A S32 S1 S41 S46 S25 S47 S21 JB JA JC FG FU1 3 15A ...

Page 32: ...8_B Indoor Unit Printed Circuit Board Connector Wiring Diagram 24 PCB 2 Signal Receiver PCB PCB 3 Display PCB PCB 4 INTELLIGENT EYE Sensor PCB 3P224121 1 S48 3P224121 1 RTH1 SW1 LED3 LED2 LED1 S49 S36 3P227885 1 ...

Page 33: ...or for display PCB 5 S32 Connector for indoor heat exchanger thermistor 6 H1 H2 H3 Connector for terminal board 7 GND Connector for terminal board ground 8 JA Address setting jumper Refer to page 265 for detail 9 JB Fan speed setting when compressor stops for thermostat OFF JC Power failure recovery function auto restart Refer to page 266 for detail 10 LED A LED for service monitor green 11 FU1 F1...

Page 34: ... Indoor Unit Printed Circuit Board Connector Wiring Diagram 26 PCB Detail PCB 1 Control PCB PCB 2 Display PCB S1 H2 S7 S26 S32 JC JB JA S21 2P131149 1 LED A FU1 H1 H3 V1 GND S1 LED3 LED2 SW1 2P084375 1 RTH1 LED1 1 ...

Page 35: ...zed control HA 4 S26 Connector for display PCB 5 S32 Connector for indoor heat exchanger thermistor 6 H1 H2 H3 Connector for terminal board 7 FG GND Connector for terminal board ground 8 JA Address setting jumper Refer to page 265 for detail 9 JB Fan speed setting when compressor stops for thermostat OFF JC Power failure recovery function auto restart Refer to page 266 for detail 10 LED A LED for ...

Page 36: ... Unit Printed Circuit Board Connector Wiring Diagram 28 PCB Detail A1P Control PCB A2P Display PCB LED 1 does not function H2 H1 H3 FG JB S21 2P292535 1 LED A JC JA S7 S1 FU1 S26 V1 S32 S1 LED3 LED2 SW1 2P084375 1 RTH1 1 ...

Page 37: ...oor temperature outdoor heat exchanger discharge pipe 11 S91 Connector for fin thermistor 12 S92 Connector for gas pipe thermistor 13 S93 Connector for liquid pipe thermistor 14 AC1 AC2 Connector for MID1 power supply 15 E Connector for ground 16 H1 H2 Connector for diode bridge 17 FU2 Fuse 3 15 A 250 V 18 V2 V5 Varistor 1 S52 S102 Connector for main PCB 2 LED A H1P LED for service monitor green 3...

Page 38: ...r for main PCB 2 S70 Connector for outdoor fan motor 3 FU201 Fuse 3 15 A 250 V 4 W V U N Connector for compressor 1 CN11 CN14 Connector for main PCB 2 L1 L2 Connector for reactor S10 S15 S51 S101 S80 S93 S92 S21 S20 S90 S40 S91 S31 S71 S33 S32 H1 yellow blue H2 V2 E AC1 AC2 V5 FU2 2P148559 3 SW2 SW5 SW1 SW3 SW4 2P148559 3 LED4 LED2 LED A S102 S52 LED3 LED1 ...

Page 39: ...utdoor Unit SiUS12 928_B 31 Printed Circuit Board Connector Wiring Diagram MID1 MID2 Inverter PCB SPM 3P080081 2 V3 HN HE FU1 HL S11 W V U N S34 S72 S70 3P080085 1 FU201 3 15A 3EB10032 4 CN14 CN11 L1 L2 ...

Page 40: ...an motor 10 S80 Connector for four way valve coil 11 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 12 S92 Connector for gas pipe thermistor 13 S93 Connector for liquid pipe thermistor 14 AC1 AC2 Connector for terminal board power supply 15 HR1 HR2 Connector for reactor 16 E1 E2 Connector for ground 17 U V W Connector for compressor 18 FU1 Fuse 30 A 250 V 1...

Page 41: ... PCB Detail PCB 1 Main PCB PCB 2 Service Monitor PCB E1 E2 FU2 V3 HR1 white blue V100 HR2 FU3 2P209947 1 2P209947 2 S40 S20 S21 S22 S23 S70 S90 S92 S93 S51 W V U S15 AC2 blue S101 S10 V5 S80 V9 V2 FU1 AC1 brown SW2 LED4 LED3 LED1 LED2 LED A S52 S102 SW4 SW3 SW1 SW5 3P165332 1 ...

Page 42: ...INTELLIGENT EYE Operation CTXS FTXS Series 47 1 12 Inverter POWERFUL Operation 48 1 13 Other Functions 49 2 Function of Thermistor 51 3 Control Specification 54 3 1 Mode Hierarchy 54 3 2 Frequency Control 55 3 3 Controls at Mode Changing Start up 57 3 4 Discharge Pipe Temperature Control 58 3 5 Input Current Control 59 3 6 Freeze up Protection Control 59 3 7 Heating Peak cut Control 60 3 8 Outdoor...

Page 43: ...ected by room temperature thermistor and the temperature of lower part of the room depending on the type of the indoor unit or installation condition Practically the temperature control is done by the target temperature appropriately adjusted for the indoor unit and the temperature detected by room temperature thermistor 1 2 Frequency Principle Main Control Parameters The frequency of the compress...

Page 44: ...keep the room temperature constant Energy saving heating and cooling Once the set temperature is reached the energy saving operation activates to maintain the room temperature at low power Phase Description 1 The supplied AC power source is converted into the DC power source for the present 2 The DC power source is reconverted into the three phase AC power source with variable frequency When the f...

Page 45: ...hetic resin provide a wide range of airflow that guarantees comfortable air distribution Auto Swing The following table explains the auto swing process for cooling dry heating and fan CTXS07JVJU CTXS09 12HVJU FTXS15 18HVJU CTXS07LVJU FTXS09 12LVJU Frequency Functions Low Four way valve operation compensation Refer to page 57 High Compressor protection function Refer to page 58 Discharge pipe tempe...

Page 46: ...n the order shown in the following diagram 1 The vertical blades fins move from the right to the left 2 The horizontal blades louvers move downward 3 The vertical blades fins move from the left to the right 4 The horizontal blades louvers move upward COMFORT AIRFLOW Operation CTXS FTXS L Series The horizontal blades louvers are controlled not to blow the air directly at the people in the room Vert...

Page 47: ...set to automatic Cooling The following drawing explains the principle of fan speed control for cooling CTXS J CTXS FTXS H FDXS D Series CTXS FTXS L CDXS FDXS L Series For CTSX FTXS L series the upper limit is M tap in 30 minutes from the operation start Heating In heating operation the fan speed is regulated according to the indoor heat exchanger temperature and the difference between the room the...

Page 48: ...perable Detail The microcomputer automatically sets the temperature and airflow rate The difference between the room thermistor temperature at start up and the target temperature is divided into two zones Then the unit operates in an appropriate capacity for each zone to maintain the temperature and humidity at a comfortable level Room thermistor temperature at start up Target temperature X Thermo...

Page 49: ... Heating Cooling switching point Tr Tt 5 4 F 3 0 C CTXS FTXS L series Tr Tt 4 5 F 2 5 C other models 2 Cooling Heating switching point Tr Tt 4 5 F 2 5 C 3 Thermostat ON OFF point is the same as the ON OFF point of cooling or heating operation 4 During initial operation Tr Ts Cooling operation Tr Ts Heating operation CTXS FTXS L series Ex When the target temperature is 25 C 77 F Cooling 73 4 F 23 C...

Page 50: ...es except A The monitoring time has passed while the temperature difference is in the zone B Cooling Dry 10 minutes Heating 10 seconds Cooling Dry CTXS FTXS series CDXS FDXS series Heating CTXS J CTXS FTXS H series B A OFF OFF ON ON C Room thermistor temperature target temperature 2 7 F 1 5 C R14452 Cooling 0 9 F 0 5 C Dry 0 9 F 0 5 C Cooling 3 6 F 2 0 C Dry 4 5 3 6 F 2 5 2 0 C B A OFF OFF ON ON C...

Page 51: ... series Refer to Temperature Control on page 35 for detail B B A OFF OFF ON ON C 3 6 F 2 0 C 0 9 F 0 5 C 2 7 F 1 5 C Room thermistor temperature target temperature R14451 B B A OFF OFF ON ON C 1 5 C 2 7 F 0 5 C 0 9 F 1 8 F 1 0 C Room thermistor temperature target temperature R12402 ...

Page 52: ... raises the target temperature slightly in the case of cooling or lowers it slightly in the case of heating This prevents excessive cooling in summer and excessive heating in winter to ensure comfortable sleeping conditions and also conserves electricity Cooling Ex CTXS FTXS Series Heating R14453 TIMER operation NIGHT SET Mode ON Target temperature 0 9 F 0 5 C temperature shift Operation stops at ...

Page 53: ...asily activated from the wireless remote controller by pushing the ECONO button When this function is activated the maximum capacity also decreases The remote controller can send the ECONO command when the unit is in COOL HEAT DRY or AUTO operation This function can only be set when the unit is running Pressing the ON OFF button on the remote controller cancels the function This function and POWER...

Page 54: ...ndicated on the display of the remote controller The indoor unit is operated according to the set temperature and airflow rate for HOME LEAVE which were pre set in the memory of the remote controller The LED red of indoor unit representing HOME LEAVE lights up It goes out when the operation is stopped 3 End of Function The function ends when the HOME LEAVE button is pressed again during HOME LEAVE...

Page 55: ...tions for example in cooling When the microcomputer does not have a signal from the sensor in 20 minutes it judges that nobody is in the room and operates the unit at a temperature shifted from the target temperature Cooling Dry 1 8 3 6 F 1 2 C higher Heating 3 6 F 2 C lower Auto according to the operation mode at that time In FAN operation the fan speed is reduced by 50 60 rpm Others For dry oper...

Page 56: ... 50 90 rpm Ex POWERFUL operation in cooling Operation mode Fan speed Target temperature COOL H tap A rpm 64 4 F 18 C DRY Dry rotating speed A rpm Lowered by 3 6 4 5 F 2 2 5 C HEAT H tap A rpm 86 88 7 F 30 31 5 C FAN H tap A rpm AUTO Same as cooling heating in POWERFUL operation The target temperature is kept unchanged R13571 Target temp Fan A rpm 64 4 F 18 C H tap Set tap 20 minutes It should be t...

Page 57: ... system operation there are times when the unit does not activate with the ON OFF button Ex CTXS FTXS L series 1 13 4 Air Purifying Filter with Photocatalytic Deodorizing Function CTXS J CTXS FTXS H Series This filter incorporates the benefits the Air Purifying Filter and Photocatalytic Deodorizing Filter in a single unit Combining the two filters in this way increases the active surface area of t...

Page 58: ...when the power is restored in the same condition as before the power failure Note It takes 3 minutes to restart the operation because the 3 minute standby function is activated 1 13 7 WEEKLY TIMER Operation CTXS FTXS L Series Up to 4 timer settings can be saved for each day of the week up to 28 settings in total Those 3 items of ON OFF temperature and time can be set Refer to page 102 for detail ...

Page 59: ... D Four way valve Compressor Defrost solenoid valve EVA EVB Receiver 1 2 3 4 A B 5 R17358 Outdoor electronic expansion valve Four way valve Compressor EVB EVC EVA 5 A B C R17359 1 2 3 4 Outdoor electronic expansion valve Four way valve Compressor EVC EVD EVB EVA 1 2 3 4 5 R17360 D C B A Outdoor electronic expansion valve ...

Page 60: ...scharge pipe temperature according to the outdoor and indoor heat exchanger temperature and controls the outdoor electronic expansion valve opening so that the target discharge pipe temperature can be obtained 2 In cooling operation the indoor heat exchanger thermistor is used for freeze up protection control If the indoor heat exchanger temperature drops abnormally the operating frequency becomes...

Page 61: ...culated with the liquid pipe temperature and the maximum indoor heat exchanger temperature The system controls the outdoor electronic expansion valve openings to obtain the target subcool 2 In heating operation the liquid pipe thermistor is used for liquid pipes isothermal control The system controls the outdoor electronic expansion valve opening so that the liquid pipe temperatures in each room b...

Page 62: ...ation mode command which is set by each room in accordance with the procedure and determines the operation mode of the system The following procedure is taken when the modes conflict with each other 1 The system follows the mode which is set first First push first set 2 For the rooms where the different mode is set standby mode is activated The operation lamp blinks Air conditioner control mode Fo...

Page 63: ...per limit frequency The minimum value is set as upper limit frequency among the frequency upper limits of the following functions Compressor protection input current discharge pipe temperature low Hz high pressure limit heating peak cut freeze up protection defrost 3 Determine lower limit frequency The maximum value is set as the lower limit frequency among the frequency lower limits of the follow...

Page 64: ...is adjusted according to the D value When the D value is low the frequency is lowered When the D value is high the frequency is increased 3 Limit of frequency increasing range When the difference between input current and input current dropping value is less than 1 5 A the frequency increasing range must be limited 4 Frequency management when other controls are functioning When each frequency is d...

Page 65: ...delay switch of the four way valve is carried out Detail OFF delay switch of four way valve The four way valve coil is energized for 150 seconds after the operation is stopped 3 3 3 Four Way Valve Operation Compensation Outline At the beginning of the operation as the four way valve is switched the pressure difference to activate the four way valve is acquired by having output frequency which is m...

Page 66: ... of frequency is set to keep the discharge pipe temperature from rising further Detail A Hz 55 B Hz 65 C Hz 80 D seconds 120 E seconds 200 F seconds 470 A D E F B C R13528 Hz Frequency sec Time Zone Control Stop zone When the temperature reaches the stop zone the compressor stops Dropping zone The upper limit of frequency decreases Keep zone The upper limit of frequency is kept Reset zone The uppe...

Page 67: ...ncy goes on Reset zone Limit of the frequency is canceled Limitation of current dropping and stop value according to the outdoor temperature The current drops when outdoor temperature becomes higher than a certain level depending on the model 3 6 Freeze up Protection Control Outline During cooling operation the signals sent from the indoor units control the operating frequency limitation and preve...

Page 68: ...ature controls the following excluding stopped rooms Zone Control Stop zone When the temperature reaches the stop zone the compressor stops Dropping zone The upper limit of frequency decreases Keep zone The upper limit of frequency is kept Up zone The upper limit of frequency increases Reset zone The upper limit of frequency is canceled 18 class 24 32 class A 149 F 65 C 149 F 65 C B 122 F 50 C 129...

Page 69: ... outdoor temperature is more than 50 F 10 C the fan is turned off for 30 seconds 6 Fan speed control during forced operation The outdoor fan is controlled as well as normal operation during the forced operation 7 Fan speed control during POWERFUL operation The rotation speed of the outdoor fan is increased during the POWERFUL operation 8 Fan speed control during indoor outdoor unit quiet operation...

Page 70: ... start of the operation or ending the previous defrosting Conditions for Canceling Defrost The target heat exchanger temperature as the canceling condition is selected in the range of 39 2 53 6 F 4 12 C according to the outdoor temperature 18 class The pulses E and F are the same 18 class 24 32 class A minutes 43 38 B Hz 54 39 C Hz 82 62 D seconds 30 60 E pulses 450 350 F pulses 450 400 G pulses 1...

Page 71: ...ts connected and all rooms being air conditioned 4 Liquid pipe temperature control for stopped rooms 5 Dew prevention control for indoor rotor Open Control 1 Outdoor electronic expansion valve control when starting operation 2 Outdoor electronic expansion valve control when the frequency changes 3 Outdoor electronic expansion valve control for defrosting 4 Outdoor electronic expansion valve contro...

Page 72: ...pen control when starting Control of target discharge pipe temperature Control when the operating room is changed Control of target discharge pipe temperature Defrost control Pressure equalizing control Open control when starting Continue Pressure equalizing control Operation pattern R16007 When power is turned on Cooling 1 room operation Cooling 2 rooms operation to Cooling 4 rooms operation Stop...

Page 73: ...oom The outdoor electronic expansion valve opening is controlled when the operation starts and prevents superheating or liquid compression 3 12 5 Control when the Frequency Changes When the target discharge pipe temperature control is active if the target frequency is changed to a specified value in a certain time period the target discharge pipe temperature control is canceled and the target open...

Page 74: ...n the thermistor is disconnected When the disconnection is ascertained the compressor continues operation for 9 minutes and then stops If the compressor stops repeatedly the system is shut down 3 12 9 Gas Pipe Isothermal Control During Cooling When the units are operating in multiple rooms the gas pipe temperature is detected and the outdoor electronic expansion valve opening is adjusted so that t...

Page 75: ...pipe temperature The outdoor electronic expansion valve opening and the target discharge pipe temperature are adjusted every 20 seconds The target discharge pipe temperature is controlled by indoor heat exchanger temperature and outdoor heat exchanger temperature The opening degree of the outdoor electronic expansion valve is controlled by the followings Target discharge pipe temperature Actual di...

Page 76: ...shuts down the compressor If the OL compressor head temperature exceeds 266 F 130 C the compressor stops 3 13 3 Refrigerant Shortage Control Outline I Detecting by power consumption If the power consumption is below the specified value and the frequency is higher than the specified frequency it is regarded as refrigerant shortage The power consumption is low comparing with that in the normal opera...

Page 77: ...indoor heat exchanger s temperature drops below the specified temperature during cooling the outdoor electonic expansion valve will open and the fully closed operation is carried out in the room After this if an abnormal freezing occurs for longer than a specified time the system will shut down ...

Page 78: ...Operation 95 3 5 POWERFUL Operation 97 3 6 OUTDOOR UNIT QUIET Operation 98 3 7 ECONO Operation 99 3 8 OFF TIMER Operation 100 3 9 ON TIMER Operation 101 3 10 WEEKLY TIMER Operation 102 3 11 Note for Multi System 108 3 12 Quick Reference 110 4 FDXS D Series 111 4 1 Remote Controller 111 4 2 AUTO DRY COOL HEAT FAN Operation 112 4 3 POWERFUL Operation 114 4 4 OUTDOOR UNIT QUIET Operation 115 4 5 HOME...

Page 79: ... heat well and how to use it efficiently Providing instructions to the user can reduce requests for servicing by 80 However proficient the installation and operating functions of the AC system are the customer may fault either the room air conditioner or its installation work when it is actually due to improper handling The installation work and the handing over of the unit can only be considered ...

Page 80: ... curtain the unit will not operate Do not drop the remote controller Do not get it wet The maximum distance for communication is approximately 23ft 7m Receiver Selects the airflow rate setting POWERFUL operation Display LCD Displays the current settings In this illustration each section is shown with its displays on for the purpose of explanation TEMPERATURE adjustment buttons ON OFF button Front ...

Page 81: ...ttings Cancels the timer setting TIMER CANCEL button OUTDOOR UNIT QUIET operation OFF TIMER button QUIET button SELECT button INTELLIGENT EYE operation Adjusting the airflow direction HOME LEAVE operation CLOCK button ON TIMER button SENSOR button SWING button HOME LEAVE button Selects the operation mode AUTO DRY COOL HEAT FAN MODE selector button Open the front cover ...

Page 82: ...Press and select a operation mode 2 Press AUTO DRY COOL HEAT FAN is displayed on the LCD The OPERATION lamp lights up Display To stop operation Press again Press or is no longer displayed on the LCD The OPERATION lamp goes off To change the temperature setting The displayed items on the LCD will change whenever either one of the buttons is pressed DRY or FAN operation COOL operation HEAT operation...

Page 83: ...T operation it takes some time before the room gets warmer In HEAT operation frost may occur on the outdoor unit and lower the heating capacity In that case the system switches into defrosting operation to take away the frost During defrosting operation hot air does not flow out of indoor unit Note on COOL operation This air conditioner cools the room by blowing the hot air in the room outside so ...

Page 84: ... louvers horizontal blades 2 When the louvers have reached the desired position press once more Adjusting the right and left airflow direction To adjust the fins vertical blades 3 Press 4 When the fins have reached the desired position press once more The louvers will stop moving is no longer displayed on the LCD is displayed on the LCD and the louvers will begin to swing is displayed on the LCD T...

Page 85: ...ch tends to collect near the ceiling throughout the room preventing areas of cold and hot developing Always use a remote controller to adjust the angles of the louvers and fins If you attempt to move it forcibly with hand when it is swinging the mechanism may be broken Always use a remote controller to adjust the fins angles Inside the air outlet a fan is rotating at a high speed Note on the angle...

Page 86: ...is displayed on the LCD is no longer displayed on the LCD Example When somebody in the room When nobody in the room Somebody back in the room Normal operation Back to normal operation 20 minutes after start energy saving operation The air conditioner is in normal operation while the sensor is detecting the movement of people The air conditioner will return to normal operation when the sensor detec...

Page 87: ...to indoor unit location the speed of passersby temperature range etc The sensor also mistakenly detects pets sunlight fluttering curtains and light reflected off of mirrors as passersby INTELLIGENT EYE operation will not go on during POWERFUL operation NIGHT SET mode will not go on during use of INTELLIGENT EYE operation Do not place large objects near the sensor Also keep heating units or humidif...

Page 88: ...FUL operation cannot be used together with QUIET operation Priority is given to the function of whichever button is pressed last In COOL and HEAT operation To maximize the cooling heating effect the capacity of outdoor unit must be increased and the airflow rate be fixed to the maximum setting The temperature and airflow settings are not variable In DRY operation The temperature setting is lowered...

Page 89: ...tion will work only when the OUTDOOR UNIT QUIET operation is set on all operated indoor units However if using priority room setting see note for multi system This function is available in COOL HEAT and AUTO operation This is not available in FAN and DRY operation POWERFUL operation and OUTDOOR UNIT QUIET operation cannot be used at the same time Priority is given to the function of whichever butt...

Page 90: ...ow rate for HOME LEAVE operation When using HOME LEAVE operation for the first time please set the temperature and airflow rate for HOME LEAVE operation Record your preferred temperature and airflow rate Cooling Heating Temperature 77 F 25 C 77 F 25 C Temperature 64 90 F 18 32 C 50 86 F 10 30 C Airflow rate AUTO AUTO Initial setting Selectable range Airflow rate 5 step and 5 step and HOME LEAVE op...

Page 91: ...s operation mode COOL or HEAT before using HOME LEAVE operation HOME LEAVE operation and POWERFUL operation cannot be used at the same time Last button that was pressed has priority The operation mode cannot be changed while HOME LEAVE operation is being used When operation is shut off during HOME LEAVE operation using the remote controller or the indoor unit ON OFF switch will remain on the remot...

Page 92: ...e setting by 10 minutes Holding down either button changes the setting rapidly The TIMER lamp lights up The TIMER lamp goes off is displayed blinks Display NOTE Notes on TIMER operation NIGHT SET mode When TIMER is set the present time is not displayed Once you set ON OFF TIMER the time setting is kept in the memory The memory is canceled when remote controller batteries are replaced When operatin...

Page 93: ...y 10 minutes Holding down either button changes the setting rapidly 3 Press again The TIMER lamp lights up Display To cancel ON TIMER operation Press To combine ON TIMER and OFF TIMER The TIMER lamp goes off A sample setting for combining the two timers is shown below Example Present time 23 00 The unit operating OFF TIMER at 0 00 ON TIMER at 14 00 Combined ATTENTION In the following cases set the...

Page 94: ...ode Available only for COOL operation CAUTION Normally the operation mode in the room where the unit is first run is given priority but the following situations are exceptions so please keep this in mind If the operation mode of the first room is FAN operation then using HEAT operation in any room after this will give priority to HEAT operation In this situation the air conditioner running in FAN ...

Page 95: ...tion operation capacity will be concentrated in room A In such a case the cooling heating efficiency of the units in room B may be slightly reduced 3 Priority when using OUTDOOR UNIT QUIET operation Example Room A is the priority room in the examples Just by setting the unit in room A to QUIET operation the air conditioner starts OUTDOOR UNIT QUIET operation You don t have to set all the operated ...

Page 96: ...the unit will not operate Do not drop the remote controller Do not get it wet The maximum distance for communication is approximately 23ft 7m FAN setting button Selects the airflow rate setting POWERFUL button POWERFUL operation Page 17 Page 14 Displays the current settings In this illustration each section is shown with all its displays on for the purpose of explanation TEMPERATURE adjustment but...

Page 97: ...L HEAT FAN Page 11 ECONO button ECONO operation SWING button Adjusting the airflow direction COMFORT SENSOR button COMFORT AIRFLOW and INTELLIGENT EYE operation WEEKLY button PROGRAM button COPY button BACK button NEXT button WEEKLY TIMER operation ON TIMER button CLOCK button SELECT button Changes the ON OFF TIMER and WEEKLY TIMER settings TIMER CANCEL button It cannot be used for the WEEKLY TIME...

Page 98: ...ir conditioner The heat pump system heats the room by circulating hot air around all parts of the room After the start of HEAT operation it takes some time before the room gets warmer In HEAT operation frost may occur on the outdoor unit and lower the heating capacity In that case the system switches into defrosting operation to take away the frost During defrosting operation hot air does not flow...

Page 99: ...2 weeks Notes on the operating conditions The air conditioner always consumes a small amount of electricity even while it is not operating If you are not going to use the air conditioner for a long period for example in spring or autumn turn the breaker off Use the air conditioner in the following conditions MODE Operating conditions COOL HEAT DRY If operation is continued out of this range Outdoo...

Page 100: ...ft airflow direction Press is displayed on the LCD The fins vertical blades will begin to swing The 3 D airflow direction Press and and are displayed on the LCD The louvers and fins move in turn To cancel 3 D airflow press either or again The louvers or fins will stop moving To set the louvers or fins at desired position This function is effective while louvers or fins are in auto swing mode Press...

Page 101: ...depends on the operation See the figure FAN operation COMFORT AIRFLOW COMFORT AIRFLOW Upper limit Upper limit Lower limit Lower limit Stop operation Stop operation Upper limit Lower limit Stop operation Note on 3 D airflow Note on airflow rate setting Using 3 D airflow circulates cold air which tends to collected at the bottom of the room and hot air which tends to collect near the ceiling through...

Page 102: ...ller airflow rates the cooling heating effect is also smaller CAUTION When the airflow is set to indoor unit quiet operation will start and the noise from the unit will become quieter In indoor unit quiet operation the airflow rate is set to a weak level In DRY operation the airflow rate setting is not variable Using 3 D airflow circulates cold air which tends to collected at the bottom of the roo...

Page 103: ...the room Normal operation 20 minutes after start energy saving operation The air conditioner is in normal operation while the sensor is detecting the movement of people The set temperature is shifted in 3 6 F 2 C steps Back to normal operation The air conditioner will return to normal operation when the sensor detects the movement of people again Energy saving operation If no presence detected in ...

Page 104: ...AUTO If the upper and lower airflow direction is selected the COMFORT AIRFLOW function will be canceled Notes on INTELLIGENT EYE operation Application range is as follows Vertical angle 90 Side view Horizontal angle 110 Top view Sensor may not detect moving objects further than 23ft 7m away Check the application range Sensor detection sensitivity changes according to indoor unit location the speed...

Page 105: ...hen using POWERFUL operation there are some functions which are not available POWERFUL operation cannot be used together with ECONO COMFORT AIRFLOW or OUTDOOR UNIT QUIET operation Priority is given to the function of whichever button is pressed last POWERFUL operation can only be set when the unit is running Pressing causes the settings to be canceled and is no longer displayed on the LCD POWERFUL...

Page 106: ...ower This is convenient in consideration of your neighbors If using a multi system the OUTDOOR UNIT QUIET operation will work only when this function is set on all operated indoor units However if using priority room setting refer to Note for multi system This function is available in COOL HEAT and AUTO operation This is not available in FAN and DRY operation POWERFUL operation and OUTDOOR UNIT QU...

Page 107: ...itioner is limited by using ECONO operation The circuit breaker is unlikely to trip even if the air conditioner and other appliances are used at same time Running current and power consumption Normal operation ECONO operation Maximum during normal operation Maximum during ECONO operation Time From start up until set temperature is reached This diagram is a representation for illustrative purposes ...

Page 108: ...ime setting rapidly 3 Press again and setting time are displayed on the LCD The TIMER lamp lights yellow To cancel OFF TIMER operation Press and setting time are no longer displayed on the LCD and day of the week are displayed on the LCD The TIMER lamp goes off Notes on TIMER operation When TIMER is set the present time is not displayed Once you set ON OFF TIMER the time setting is kept in the mem...

Page 109: ... 10 minutes Holding down either button changes the setting rapidly 3 Press again and setting time are displayed on the LCD The TIMER lamp lights yellow To cancel ON TIMER operation Press and setting time are no longer displayed on the LCD and day of the week are displayed on the LCD The TIMER lamp goes off To combine ON TIMER and OFF TIMER A sample setting for combining the 2 timers is shown below...

Page 110: ...mer settings up to programs 1 4 Program 1 ON Program 2 OFF Program 3 ON Program 4 OFF Monday Tuesday to Friday Saturday Sunday Use the copy mode to make settings for Tuesday to Friday because these settings are the same as those for Monday Program 1 Program 2 Program 3 Program 4 OFF ON OFF ON Make timer settings up to programs 1 4 Program 1 Program 2 Program 3 Program 4 OFF OFF ON ON Up to 4 reser...

Page 111: ...ress The day of the week and the reservation number of the current day will be displayed 1 to 4 settings can be made per day 2 Press to select the desired day of the week and reservation number Pressing changes the reservation number and the day of the week 3 Press The day of the week and reservation number will be set and blink 4 Press to select the desired mode Pressing changes or setting in seq...

Page 112: ...ER operation is activated The TIMER lamp lights yellow A reservation made once can be easily copied and the same settings used for another day of the week Refer to Notes on WEEKLY TIMER operation Do not forget to set the clock on the remote controller first The day of the week ON OFF TIMER mode time and set temperature only for ON TIMER mode can be set with WEEKLY TIMER Other settings for ON TIMER...

Page 113: ...Press 5 Press 4 Press to select the destination day of the week 2 Press to confirm the day of the week to be copied 6 Press to complete the setting The whole reservation of the selected day of the week will be copied The reservation will be copied to the selected day of the week The whole reservation of the selected day of the week will be copied To continue copying the settings to other days of t...

Page 114: ...press The mode is switched to setting mode Go to STEP 4 Setting mode Page 23 3 Press to exit confirming mode Display To deactivate WEEKLY TIMER operation 2 Press to select the day of the week and the reservation number to be confirmed is displayed on the LCD and WEEKLY TIMER operation is activated The TIMER lamp lights yellow Press while is displayed on the LCD will be no longer displayed on the L...

Page 115: ...peration will be activated The reservations for each day of the week 2 Hold for 5 seconds The reservation of the selected day of the week will be deleted All reservations Hold for 5 seconds while normal display 2 Press to select the day of the week and the reservation number to be deleted This function can be used for deleting reservations for each day of the week It can be used while confirming o...

Page 116: ...peration mode as that of the room with the first unit to be turned on Normally the operation mode in the room where the unit is first run is given priority but the following situations are exceptions so please keep this in mind If the operation mode of the first room is FAN operation then using HEAT operation in any room after this will give priority to HEAT operation In this situation the air con...

Page 117: ...n mode from other rooms Room A is the priority room in the examples When COOL operation is selected in room A while operating the following modes in room B C and D Operation mode in room B C and D COOL or DRY or FAN HEAT AUTO Status of room B C and D when the unit in room A is in COOL operation Current operation mode maintained The unit enters standby mode Operation resumes when the room A unit st...

Page 118: ...SiUS12 928_B CTXS L FTXS L Series Operation Manual 110 3 12 Quick Reference Quick Reference C 3P297290 1 C 3P297290 2 ...

Page 119: ...OWERFUL operation page 12 5 TEMPERATURE adjustment buttons It changes the temperature setting 6 ON OFF button Press this button once to start operation Press once again to stop it 7 MODE selector button It selects the operation mode AUTO DRY COOL HEAT FAN page 10 8 QUIET button OUTDOOR UNIT QUIET operation page 13 9 FAN setting button It selects the air flow rate setting 10 ON TIMER button page 17...

Page 120: ...r conditioner operates with the operation mode of your choice From the next time on the air conditioner will operate with the same operation mode 1 Press MODE selector button and select a operation mode Each pressing of the button advances the mode setting in sequence To stop operation 3 Press ON OFF button again Then OPERATION lamp goes off To change the temperature setting 4 Press TEMPERATURE ad...

Page 121: ...room gets warmer In heating operation frost may occur on the outdoor unit and lower the heating capacity In that case the system switches into defrosting operation to take away the frost During defrosting operation hot air does not flow out of indoor unit Note on COOL operation This air conditioner cools the room by blowing the hot air in the room outside so if the outside temperature is high perf...

Page 122: ...button again is no longer displayed on the LCD Notes on POWERFUL operation POWERFUL Operation cannot be used together with QUIET Operation Priority is given to the function of whichever button is pressed last POWERFUL Operation can only be set when the unit is running Pressing the operation stop button causes the settings to be canceled and the is no longer displayed on the LCD In COOL and HEAT mo...

Page 123: ... operation 1 Press QUIET button is displayed on the LCD 2 Press QUIET button again disappears from the LCD Note on OUTDOOR UNIT QUIET operation This function is available in COOL HEAT and AUTO modes This is not available in FAN and DRY modes POWERFUL operation and OUTDOOR UNIT QUIET operation cannot be used at the same time Priority is given to the function of whichever button is pressed last If o...

Page 124: ...ME LEAVE lamp goes off To set the temperature and air flow rate for HOME LEAVE operation When using HOME LEAVE operation for the first time please set the temperature and air flow rate for HOME LEAVE operation Record your preferred temperature and air flow rate Air flow rate 5 step and 5 step and 64 90 F 18 32 C 50 86 F 10 30 C Air flow rate Temperature 77 F 77 F 1 Press HOME LEAVE button Make sur...

Page 125: ...on before leaving the living room when going to bed The unit will maintain the temperature in the room at a comfortable level while you sleep When you enter the living room in the morning the temperature will be just right Disengaging HOME LEAVE Operation will return the temperature to that set for normal operation Even the coldest winters will pose no problem 2 Use as a favorite mode Once you rec...

Page 126: ... setting by 10 minutes Holding down either button changes the setting rapidly 3 Press OFF TIMER button again The TIMER lamp lights up To cancel the OFF TIMER operation 4 Press CANCEL button The TIMER lamp goes off When TIMER is set the present time is not displayed Once you set ON OFF TIMER the time setting is kept in the memory The memory is canceled when remote controller batteries are replaced ...

Page 127: ...ding down either button changes the setting rapidly 3 Press ON TIMER button again The TIMER lamp lights up To cancel ON TIMER operation 4 Press CANCEL button The TIMER lamp goes off To combine ON TIMER and OFF TIMER A sample setting for combining the two timers is shown below Example Combined Present time 11 00 p m The unit operating OFF TIMER at 0 00 a m ON TIMER at 7 00 a m 4 2 1 3 ATTENTION In ...

Page 128: ...emote controller aim the transmitter at the indoor unit If there is anything to block signals between the unit and the remote controller such as a curtain the unit will not operate Do not drop the remote controller Do not get it wet The maximum distance for communication is approximately 13ft 4m Page 13 Page 14 Displays the current settings In this illustration each section is shown with all its d...

Page 129: ...TIMER button CLOCK button SELECT button QUIET button Page 15 OFF TIMER button Cancels the timer setting MODE selector button Selects the operation mode AUTO DRY COOL HEAT FAN Page 11 Page 16 Page 18 Page 17 18 Changes the ON OFF TIMER settings OUTDOOR UNIT QUIET operation Page 17 TIMER CANCEL button Page 17 18 ...

Page 130: ...ir conditioner The heat pump system heats the room by circulating hot air around all parts of the room After the start of HEAT operation it takes some time before the room gets warmer In HEAT operation frost may occur on the outdoor unit and lower the heating capacity In that case the system switches into defrosting operation to take away the frost During defrosting operation hot air does not flow...

Page 131: ...r a curtain Blocking sunlight and air from outdoors increases the cooling heating effect Clogged air filters cause inefficient operation and waste energy Clean them once in about every 2 weeks Notes on the operating conditions The air conditioner always consumes a small amount of electricity even while it is not operating If you are not going to use the air conditioner for a long period for exampl...

Page 132: ... in sequence Auto Indoor unit quiet Low Middle low Middle Middle high High When the airflow is set to indoor unit quiet operation will start and the noise from the unit will become quieter In indoor unit quiet operation the airflow rate is set to a weak level In DRY operation the airflow rate setting is not variable Note on airflow rate setting At smaller airflow rates the cooling heating effect i...

Page 133: ...ere are some functions which are not available POWERFUL operation cannot be used together with ECONO and OUTDOOR UNIT QUIET operation Priority is given to the function of whichever button is pressed last POWERFUL Operation can only be set when the unit is running Pressing the operation stop button causes the settings to be canceled and is no longer displayed on the LCD POWERFUL operation will not ...

Page 134: ...nient in consideration of your neighbors Page 19 If using a multi system the OUTDOOR UNIT QUIET operation will work only when this function is set on all operated indoor units However if using priority room setting refer to note for multi system This function is available in COOL HEAT and AUTO operation This is not available in FAN and DRY operation POWERFUL operation and OUTDOOR UNIT QUIET operat...

Page 135: ...r is limited by using ECONO operation The circuit breaker is unlikely to trip even if the air conditioner and other appliances are used at same time This diagram is a representation for illustrative purposes only The maximum running current and power consumption of the air conditioner in ECONO operation vary with the connecting outdoor unit Running current and power consumption Normal operation Ma...

Page 136: ...0 minutes Holding down either button changes the time setting rapidly and setting time are displayed on the LCD The TIMER lamp lights yellow and setting time are no longer displayed on the LCD and day of the week are displayed on the LCD The TIMER lamp goes off Notes on TIMER operation When TIMER is set the present time is not displayed Once you set ON OFF TIMER the time setting is kept in the mem...

Page 137: ...on the LCD blinks 2 Press until the time setting reaches the point you like Each pressing of either button increases or decreases the time setting by 10 minutes Holding down either button changes the setting rapidly and setting time are displayed on the LCD The TIMER lamp lights yellow and setting time are no longer displayed on the LCD and day of the week are displayed on the LCD The TIMER lamp g...

Page 138: ... mode as that of the room with the first unit to be turned on Normally the operation mode in the room where the unit is first run is given priority but the following situations are exceptions so please keep this in mind If the operation mode of the first room is FAN operation then using HEAT operation in any room after this will give priority to HEAT operation In this situation the air conditioner...

Page 139: ...he operation mode of the priority room takes precedence the user can select a different operation mode from other rooms Room A is the priority room in the examples When COOL operation is selected in room A while operating the following modes in room B C and D Status of room B C and D when the unit in room A is in COOL operation Current operation mode maintained The unit enters standby mode Operati...

Page 140: ...SiUS12 928_B CDXS L FDXS L Series Operation Manual 132 5 10 Quick Reference Quick Reference C 3P297290 3 ...

Page 141: ...Unit 156 6 1 Refrigerant Shortage 156 6 2 Low voltage Detection or Over voltage Detection 159 6 3 Signal Transmission Error on Outdoor Unit PCB 24 32 Class Only 161 6 4 Unspecified Voltage between Indoor Unit and Outdoor Unit Anti icing Function in Other Rooms 162 6 5 Anti icing Function 163 6 6 Outdoor Unit PCB Abnormality 24 32 Class Only 165 6 7 OL Activation Compressor Overload 166 6 8 Compres...

Page 142: ...94 7 6 Four Way Valve Performance Check 195 7 7 Inverter Unit Refrigerant System Check 195 7 8 Inverter Checker Check 196 7 9 Rotation Pulse Check on the Outdoor Unit PCB 197 7 10 Installation Condition Check 198 7 11 Discharge Pressure Check 198 7 12 Outdoor Fan System Check 199 7 13 Main Circuit Short Check 199 7 14 Capacitor Voltage Check 200 7 15 Power Module Check 201 ...

Page 143: ...e indoor units connected to multi system outdoor unit If not set all the indoor units to the same operation mode and confirm that the operation lamp is not blinking Moreover when the operation mode is automatic set all the indoor unit operation mode as cooling or heating and check again if the operation lamp is normal If the lamp stops blinking after the above steps there is no malfunction Operati...

Page 144: ...ED 1 LED 4 on the PCB When the microcomputer works in order the LED A blinks and when the system is in normal condition the red LEDs are OFF Even after the error is canceled and the unit operates in normal condition the LED indication remains Service monitor PCB LED A LED 1 LED 2 LED 3 LED 4 2MXS18GVJU 3MXS24JVJU 4MXS32GVJU R17364 ...

Page 145: ...ooling operation cannot be used when the outdoor temperature is below 14 F 10 C Diagnose with remote controller indication 144 145 Some indoor units do not operate Check the type of the indoor units Check if the indoor unit type is compatible with the outdoor unit Diagnose with remote controller indication 144 145 Units operate but do not cool or do not heat Check for wiring and piping errors in t...

Page 146: ...ve beeps indicate non corresponding codes 2 To return to the normal mode hold the timer cancel button down for 5 seconds When the remote controller is left untouched for 60 seconds it also returns to the normal mode 3 Not all the error codes are displayed When you cannot find the error code try the check method 2 Refer to page 139 No Code No Code No Code 1 00 13 C7 25 UA 2 U4 14 A3 26 UH 3 L5 15 H...

Page 147: ...ep 3 Diagnose by the sound beep The left side number does not correspond with the error code two consecutive beeps The left side number corresponds with the error code but the right side number does not long beep Both the left side and right side number correspond with the error code The numbers indicated when you hear the long beep are the error code Error codes and description Refer to page 144 ...

Page 148: ...beep Both the left side and right side number corresponds with the error code 7 Determine the error code The numbers indicated when you hear the long beep are the error code Error codes and description Refer to page 144 145 8 Press the MODE button to exit from the diagnosis mode The display means the trial operation mode Refer to page 259 for trial operation 9 Press the ON OFF button twice to retu...

Page 149: ...eeps indicate non corresponding codes 2 To return to the normal mode hold the timer cancel button down for 5 seconds When the remote controller is left untouched for 60 seconds it also returns to the normal mode 3 Not all the error codes are displayed When you cannot find the error code try the check method 2 Refer to page 142 Timer cancel button R14555 ARC433 Series No Code No Code No Code 1 00 1...

Page 150: ...he long beep 3 Diagnose by the sound beep The left side number does not correspond with the error code two consecutive beeps The left side number corresponds with the error code but the right side number does not long beep Both the left side and right side numbers correspond with the error code The numbers indicated when you hear the long beep are the error code Error codes and description Refer t...

Page 151: ... beep Both the left side and right side numbers correspond with the error code 7 Determine the error code The numbers indicated when you hear the long beep are the error code Error codes and description Refer to page 144 145 8 Press the MODE button to exit from the diagnosis mode The display means the trial operation mode Refer to page 259 for trial operation 9 Press the ON OFF button twice to ret...

Page 152: ...146 A5 Freeze up protection control or heating peak cut control 148 A6 Fan motor or related abnormality DC motor CTXS FTXS series 150 AC motor CDXS FDXS series 152 C4 Indoor heat exchanger thermistor or related abnormality 153 C9 Room temperature thermistor or related abnormality 153 U4 Signal transmission error between indoor unit and outdoor unit 154 UA Unspecified voltage between indoor unit an...

Page 153: ...rigerant shortage 156 5 4 3 3 4 U2 Low voltage detection or over voltage detection 159 5 3 4 4 4 U7 Signal transmission error on outdoor unit PCB 24 32 class only 161 5 4 3 4 4 A5 Anti icing function 163 5 4 4 4 3 E1 Outdoor unit PCB abnormality 24 32 class only 165 5 4 3 4 3 E5 OL activation compressor overload 166 5 3 4 4 3 E6 Compressor lock 167 5 4 4 4 4 E7 DC fan lock 168 5 3 4 3 4 E8 Input o...

Page 154: ...oller Display A1 Method of Malfunction Detection The system checks if the circuit works properly within the microcomputer of the indoor unit Malfunction Decision Conditions The system cannot set the internal settings Supposed Causes Wrong models interconnected Defective indoor unit PCB Disconnection of connector Reduction of power supply voltage ...

Page 155: ... Voltage as rated Error repeats Error repeats YES NO NO YES NO NO YES R15270 Caution To secure the connection once disconnect the connector and then reconnect it YES NO YES NO YES NO YES Match the compatible models Correct the power supply Replace the indoor unit PCB 1 Completed Completed Correct the power supply Replace the indoor unit PCB 1 Completed Be sure to turn off the power switch before c...

Page 156: ... During heating operation the temperature detected by the indoor heat exchanger thermistor is used for the heating peak cut control operation halt outdoor fan stop etc Malfunction Decision Conditions Freeze up protection control During cooling operation the indoor heat exchanger temperature is below 32 F 0 C Heating peak cut control During heating operation the indoor heat exchanger temperature is...

Page 157: ...ficient air passage Clean the air filter Clean the indoor heat exchanger Replace the indoor unit PCB Replace the thermistor As described in the thermistor characteristic chart Check the air filter Check the dust accumulation on the indoor heat exchanger Is there any short circuit Dirty Dirty Check the air passage Be sure to turn off the power switch before connecting or disconnecting connectors or...

Page 158: ...g fan motor operation is used to determine abnormal fan motor operation Malfunction Decision Conditions The detected rotation speed does not reach the demanded rotation speed of the target tap and is less than 50 of the maximum fan motor rotation speed Supposed Causes Layer short inside the fan motor winding Breaking of wire inside the fan motor Breaking of the fan motor lead wires Defective capac...

Page 159: ... Check the output of the fan motor connector R14970 NO YES YES NO YES NO Replace the indoor fan motor Replace the indoor unit PCB Replace the indoor unit PCB Replace the indoor fan motor Replace the indoor fan motor and the indoor unit PCB Turn off the power supply and rotate the fan by hand Does the fan rotate smoothly Turn the power on and start operation Does the fan rotate Stop the fan motor I...

Page 160: ...fer to P 192 NO NO NO NO NO NO YES YES YES YES YES YES R17393 Caution Replace the fan motor or the indoor unit PCB Replace the indoor fan motor Replace the indoor unit PCB Replace the capacitor Replace the indoor unit PCB Replace the fan motor Replace the fan motor Replace the indoor unit PCB Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged...

Page 161: ...ring compressor operation Supposed Causes Disconnection of connector Defective thermistor Defective indoor unit PCB Troubleshooting Check No 01 Refer to P 191 C4 Indoor heat exchanger thermistor C9 Room temperature thermistor YES R15717 NO YES NO Caution Correct the connection Replace the thermistor Replace the indoor unit PCB Replace the indoor unit PCB Be sure to turn off the power switch before...

Page 162: ...d power supply waveform Troubleshooting Check No 11 Refer to P 193 Check the voltage of the indoor unit outdoor unit connection wires between No 1 and No 3 and between No 2 and No 3 Check No 11 Check the power supply waveform YES YES Replace the indoor unit PCB Locate the cause of the disturbance of the power supply waveform and correct it NO R15782 NO YES YES NO NO Caution Correct the indoor unit...

Page 163: ...ed Wrong wiring of connecting wires Wrong indoor unit PCB or outdoor unit PCB mounted Defective indoor unit PCB Defective outdoor unit PCB Troubleshooting R11707 Caution NO YES YES YES NO NO Check the code numbers 2P01234 for example of the indoor and outdoor unit PCB with the Parts List Match the compatible models Change for the correct PCB Replace the indoor unit PCB or the outdoor unit PCB Corr...

Page 164: ...continue for 7 minutes 18 class Input current input voltage A output frequency B Output frequency C 24 32 class Input current D output frequency E Output frequency F Refrigerant shortage detection II The following conditions continue for 80 seconds Opening of the outdoor electronic expansion valve G Discharge pipe temperature C H target discharge pipe temperature C J C Discharge pipe temperature F...

Page 165: ...sening Correct it as required Also replace the cracked pipe Check the pipes for improper contact Correct them as required Also replace the cracked pipe Replace the outdoor electronic expansion valve Replace the defective thermistor s Completed Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged OK NO YES Replace the compressor Completed Any th...

Page 166: ...igerant Check No 12 Outdoor electronic expansion valve functioning Replace the thermistor s in position Open the stop valve Repair the pipe flare or replace the union Check the harness for loosening Correct it as required Also replace the cracked pipe Check the pipes for improper contact Correct them as required Also replace the cracked pipe Replace the outdoor electronic expansion valve Replace t...

Page 167: ...s no zero cross detection in approximately 10 seconds Outdoor Unit Low voltage detection The voltage detected by the DC voltage detection circuit is below 150 V for 0 1 second If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Over voltage detection An over voltage signal is fed from the over voltage detection circuit to the mic...

Page 168: ...nnectors or parts may be damaged NO NO YES NO YES YES Reconnect the harness Check the power supply voltage Check the connection of the compressor harness Disturbance factors Noise Power supply distortion Repeat a few times Precaution before turning on the power again Make sure the power has been off for at least 30 seconds Replace the indoor unit PCB Turn on the power again System restarted Error ...

Page 169: ... abnormality is determined when the data sent from the PM1 can not be received for 9 seconds The error counter is reset when the data from the PM1 can be successfully received Supposed Causes Defective outdoor unit PCB Troubleshooting R7185 Caution NO YES Turn off the power and turn it on again Replace the outdoor unit PCB The cause can be an external factor other than the malfunction Observe the ...

Page 170: ...rnal voltages Mismatching of indoor and outdoor units Supposed Causes Anti icing function in other rooms Wrong models interconnected Wrong indoor unit PCB or outdoor unit PCB mounted Troubleshooting Note Refer to Anti icing function on page 163 for detail R15723 Caution NO YES NO YES NO YES Check the model combination Check the combination of all connected models Error displayed while operating Po...

Page 171: ...tor that are located in a shut down room Malfunction Decision Conditions In cooling operation the both conditions A and B are met for 5 minutes A Room temperature Indoor heat exchanger temperature 18 F 10 C B Indoor heat exchanger temperature 30 2 F 1 C If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Wrong wir...

Page 172: ...lve or coil Replace the outdoor heat exchanger thermistor Replace the room temperature thermistor Replace the room temperature thermistor or indoor heat exchanger thermistor Do the vacuum drying Replace the indoor unit PCB and then start the wiring error check function Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Check the wiring and pi...

Page 173: ...of the microcomputer is in abnormal running order Supposed Causes Defective outdoor unit PCB Noise Momentary fall of voltage Momentary power failure Troubleshooting R7183 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged YES NO NO YES Replace the outdoor unit PCB Carry out grounding work The cause can be external factors other than m...

Page 174: ...ed in refrigerant Defective stop valve Troubleshooting Check No 01 Refer to P 191 Check No 12 Refer to P 194 Check No 13 Refer to P 195 Check No 14 Refer to P 195 R14438 Caution YES NG Discharge pipe thermistor NO OK OK NG NG OK NG OK Refrigerant shortage Water mixed Stop valve Insert the thermistor in position Replace the discharge pipe thermistor Replace the outdoor electronic expansion valve or...

Page 175: ...ed Troubleshooting Check No 15 Refer to P 196 Turn off the power Disconnect the harnesses U V and W R14439 Caution NO YES YES NO NO YES Check No 15 Check with the inverter checker Turn off the power and reconnect the harnesses Turn on the power again and restart the system Precaution before turning on the power again Make sure the power has been off for at least 30 seconds Correct the power supply...

Page 176: ...r error Supposed Causes Disconnection of the fan motor Foreign matter stuck in the fan Defective fan motor Defective outdoor unit PCB Troubleshooting Check No 16 Refer to P 197 R15890 Caution YES YES NO YES NO NO YES NO Turn on the power Rotate the fan Check No 16 Check the rotation pulse input on the outdoor unit PCB Turn off the power and reconnect the connector Remove the foreign matter Replace...

Page 177: ...8 Check No 18 Refer to P 198 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged R15325 NO YES YES NO Check No 17 Check the installation condition Start operation and measure the input current Turn off the power and disconnect the harnesses U V and W Check No 15 Check with the inverter checker Turn off the power and reconnect the harne...

Page 178: ...l ranges in the operating mode Malfunction Decision Conditions Either of the following conditions occurs 6 minutes after the compressor has started Cooling operation The lowest liquid pipe temperature among the rooms in operation Tde 5 C 41 F Heating operation The highest liquid pipe temperature among the rooms in operation Tde 0 C 32 F Tde outdoor heat exchanger temperature Supposed Causes Poor c...

Page 179: ... Replace the four way valve defective or dust clogged Reconnect the thermistor s in position Caution R15824 Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Water mixed Stop valve Four way valve coil disconnected loose Harness out of connector Any thermistor disconnected Check No 01 Check the thermistors Check No 14 Check the refrigerant li...

Page 180: ...e thermistor Defective outdoor electronic expansion valve or coil Refrigerant shortage Defective four way valve Water mixed in refrigerant Defective stop valve Defective outdoor unit PCB Troubleshooting Check No 01 Refer to P 191 Check No 12 Refer to P 194 Check No 14 Refer to P 195 A B 248 F 120 C 224 6 F 107 C R15286 Caution NG OK OK OK NG NG Discharge pipe thermistor Outdoor heat exchanger ther...

Page 181: ...ctive outdoor heat exchanger thermistor Defective outdoor unit PCB Troubleshooting Check No 01 Refer to P 191 Check No 12 Refer to P 194 Check No 17 Refer to P 198 Check No 18 Refer to P 198 Check No 19 Refer to P 199 R17394 Caution Replace the outdoor fan motor Reconnect the connector or fan motor lead wires Replace the stop valve Replace the outdoor heat exchanger thermistor Replace the outdoor ...

Page 182: ...startup Fault condition is identified by the compressor current which is detected right after the compressor startup If the error repeats the system is shut down Reset condition Continuous run for about 5 minutes without any other error Malfunction Decision Conditions The detected value of the supply voltage and the DC voltage is obviously low or high The compressor current does not run when the c...

Page 183: ...connect the reactor from the outdoor unit PCB and measure the resistance value between reactor terminals with tester Disconnect the compressor relay harness from the outdoor unit PCB and measure the resistance value between each terminal with a tester Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Turn off the power Reactor connec...

Page 184: ...tected by checking the compressor running condition through the position detection circuit Malfunction Decision Conditions If the error repeats the system is shut down Reset condition Continuous run for about 5 minutes without any other error Supposed Causes Disconnection of the compressor relay cable Defective compressor Defective outdoor unit PCB Start up failure caused by the closed stop valve ...

Page 185: ...YES YES Check No 20 Check the short circuit of the diode bridge Check No 15 Check with the inverter checker Turn off the power Disconnect the harnesses U V and W Turn on the power Check the electrolytic capacitor voltage Electrical components or compressor harnesses connected as specified Replace the outdoor unit PCB Replace the compressor Correct the power supply or replace the outdoor unit PCB R...

Page 186: ...e as rated R15892 NO NO YES NO YES YES Check No 15 Check with the inverter checker Turn off the power Disconnect the harnesses U V and W Turn on the power Check the electrolytic capacitor voltage Electrical components or compressor harnesses connected as specified Replace the outdoor unit PCB Replace the compressor Correct the power supply or replace the outdoor unit PCB Reconnect the electrical c...

Page 187: ...compressor running frequency and CT detected input current Malfunction Decision Conditions The compressor running frequency is more than A Hz and input current is less than B A If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Defective power module Broken or disconnected wiring Defective reactor Defective outdo...

Page 188: ...d reconnect the harnesses Then turn on the power again and restart operation Replace the outdoor unit PCB Replace the outdoor unit PCB Replace the outdoor unit PCB Check the supply voltage Replace the compressor Capacitor charged when the indoor unit or outdoor unit main relay turns on Rising with increasing frequency Correct the power supply or replace the outdoor unit PCB Inverter checker Part N...

Page 189: ... each thermistor Malfunction Decision Conditions The thermistor input is above 4 96 V or below 0 04 V with the power on J3 error is judged if the discharge pipe temperature is lower than the heat exchanger temperature The system is shut down if all the units are judged as the J8 error Supposed Causes Disconnection of the connector for the thermistor Defective thermistor corresponding to the error ...

Page 190: ...ischarge pipe temperature is lower than the heat exchanger temperature Replace the defective thermistor s Outdoor temperature thermistor Discharge pipe thermistor Outdoor heat exchanger thermistor Liquid pipe thermistor Gas pipe thermistor Radiation fin thermistor Cooling Outdoor heat exchanger thermistor Heating Indoor heat exchanger thermistor Replace the indoor heat exchanger thermistor Replace...

Page 191: ...function Decision Conditions With the compressor off the radiation fin temperature is above A The error is cleared when the temperature drops below B To cool the electrical components the outdoor fan starts when the radiation fin temperature rises above C and stops when it drops below B Supposed Causes Defective outdoor fan motor Short circuit Defective radiation fin thermistor Disconnection of co...

Page 192: ...heck the radiation fin temperature Check No 17 Check the installation condition Radiation fin dirty Above A As described in the thermistor characteristic chart Check No 01 Check the thermistor resistance value Check No 19 Check the outdoor fan or related Error again or outdoor fan activated Replace the radiation fin thermistor Replace the outdoor unit PCB Replace the outdoor unit PCB Replace the o...

Page 193: ...e installation condition Slightly dirty Check the radiation fin temperature Turn off the power and turn it on again WARNING Replace the outdoor unit PCB Replace the outdoor fan motor Correct the connectors and fan motor lead wire Replace the outdoor unit PCB Clean up the radiation fin Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Radiati...

Page 194: ...he radiation fin temperature with the compressor on is above A The error is cleared when the temperature drops below B If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Defective outdoor fan motor Short circuit Defective radiation fin thermistor Disconnection of connector Defective outdoor unit PCB Silicon greas...

Page 195: ...e radiation fin temperature Check No 17 Check the installation condition NO YES YES Above A Radiation fin dirty As described in the thermistor characteristic chart Check No 01 Check the thermistor resistance value Check No 19 Check the outdoor fan or related Error displayed again Has PCB been replaced Replace the fin thermistor Check if the silicon grease is applied properly on the radiation fin I...

Page 196: ...n temperature Check No 17 Check the installation condition NO YES YES Above A Radiation fin dirty Check No 19 Check the outdoor fan or related Error displayed again Has the PCB been replaced Check if the silicon grease is applied properly on the radiation fin If not apply it Silicon grease Part No 1172698 Replace the outdoor unit PCB Clean up the radiation fin Be sure to turn off the power switch ...

Page 197: ...itions A position signal error occurs while the compressor is running A speed error occurs while the compressor is running An output overcurrent signal is fed from the output overcurrent detection circuit to the microcomputer If the error repeats the system is shut down Reset condition Continuous run for about 5 minutes without any other error Supposed Causes Poor installation condition Closed sto...

Page 198: ...put overcurrent may result from wrong internal wiring If the system is interrupted by an output overcurrent after the wires have been disconnected and reconnected for part replacement check the wiring again Keep on using Check the connectors and other components Monitor the power supply voltage discharge and suction pressures and other factors for a long term Possible causes Momentary fall of powe...

Page 199: ...tor is directly mounted on the display PCB Remove the display PCB from the control PCB to measure the resistance When the indoor heat exchanger thermistor is soldered on the PCB remove the thermistor and measure the resistance Temperature F C Resistance k 4 20 197 8 5 15 148 2 14 10 112 1 23 5 85 60 32 0 65 93 41 5 51 14 50 10 39 99 59 15 31 52 68 20 25 02 77 25 20 00 86 30 16 10 95 35 13 04 104 4...

Page 200: ...ection 2 With the power on operation off and the connector connected check the following Output voltage of about 5 V between pins 1 and 3 Generation of 3 pulses between pins 2 and 3 when the fan motor is operating If NG in step 1 Defective PCB Replace the PCB If NG in step 2 Defective Hall IC Replace the fan motor If OK in both steps 1 and 2 Replace the PCB 7 6 5 4 3 2 1 S1 R12404 Motor power supp...

Page 201: ...asure the power supply waveform between No 1 and No 2 on the terminal board and check the waveform disturbance Check to see if the power supply waveform is a sine wave Fig 1 Check to see if there is waveform disturbance near the zero cross sections circled in Fig 2 Fig 1 Fig 2 R1736 R1444 ...

Page 202: ... note that the latching sound varies depending on the valve type If the system keeps operating with a defective outdoor electronic expansion valve the following problem may occur Valveopening position Possible problem Check method Open Cooling Flowing noise of refrigerant in the unit which is not in operation Water leakage at the unit which is not in operation Operation half due to anti icing func...

Page 203: ...heck the continuity Start heating operation Four way valve coil Cooling dry No continuity Heating Continuity Replace the outdoor unit PCB Replace the four way valve coil Replace the four way valve Four way valve coil resistance at 1000 2000 W S80 voltage at 208 230 VAC with compressor on Fig 1 Refrigerant system check Is the discharge pipe thermistor disconnected from the holder Check for refriger...

Page 204: ...voltage of the built in smoothing electrolytic capacitor drops to 10 VDC or below before carrying out the service work Reference If the terminals of the compressor are not FASTON terminals difficult to remove the wire on the terminals it is possible to connect wires available on site to the outdoor unit from output side of PCB Do not connect them to the compressor at the same time otherwise it may...

Page 205: ...he terminals may be burned due to loosening 7 9 Rotation Pulse Check on the Outdoor Unit PCB Check No 16 Outdoor fan motor Make sure that the voltage of 320 30 V is applied 1 Set operation off and power off Disconnect the connector S70 2 Check that the voltage between the pins 4 7 is 320 VDC 3 Check that the control voltage between the pins 3 4 is 15 VDC 4 Check that the rotation command voltage b...

Page 206: ...dirty Change the installation location or direction Change the installation location or direction Clean the outdoor heat exchanger Change the installation location or direction Check the outdoor temperature The outdoor temperature should be within operation range R15738 Not dirty YES YES Dirty NO NO NO YES Is the air filter or indoor outdoor heat exchanger dirty Replace the compressor Open the sto...

Page 207: ...esistance is or less than 1 k short circuit occurs on the main circuit R15128 YES YES NO NO Check the outdoor unit fan system Outdoor unit fan running Outdoor unit fan system functioning Go to Check No 16 Reconnect the connector Fan motor lead wire connector disconnected terminal of the tester in case of digital terminal terminal of the tester in case of digital terminal Resistance is OK several k...

Page 208: ...the main circuit for short circuit With the circuit breaker still on measure the voltage according to the drawing of the model in question Be careful never to touch any live parts 18 class 24 32 class TB2 PS TB3 P2 N1 S90 S92 S93 S80 S20 S21 S22 S40 R11308 Multimeter DC voltage range R12869 Multimeter DC voltage range ...

Page 209: ...easure resistance between the terminals of the power module and the terminals of the compressor with a multi tester Evaluate the measurement results referring to the following table 18 class 24 32 class Negative terminal of tester positive terminal for digital tester Power module UVW Power module UVW Positive terminal of tester negative terminal for digital tester UVW Power module UVW Power module...

Page 210: ...d Blankets 213 1 6 Removal of Coils Thermistors 215 1 7 Removal of Four Way Valve Defrost Solenoid Valve 217 1 8 Removal of Distributor 219 1 9 Removal of Compressor 220 2 Outdoor Unit 3MXS24JVJU 4MXS32GVJU 222 2 1 Removal of Outer Panels 222 2 2 Removal of Electrical Box 234 2 3 Removal of PCBs 240 2 4 Removal of Fan Motor 244 2 5 Removal of Coils Thermistors 245 2 6 Removal of Sound Blankets 250...

Page 211: ...es or more after turning off all power supplies before disassembling work Step Procedure Points 1 Appearance features 2 Remove the 4 screws of the top panel and the 6 screws of the front panel 3 Remove the 4 screws of the discharge grille 4 Remove the 2 screws of the stop valve cover R2159 Top panel Discharge grille R10351 Front panel R10352 Stop valve cover ...

Page 212: ... Remove all the screws of the connecting wires and the power supply wires 3 Remove the screw of the ground wire 2 Disconnect the harnesses S20 White S21 Red Bundle the harnesses of the electronic expansion valve coil with clamp Pull out the clamp When reassembling insert the clamp into one of the holes 1 Disconnect the 2 connectors for the electronic expansion valve coil S20 S21 Liquid room A Liqu...

Page 213: ...ture outdoor heat exchanger discharge pipe S92 gas pipe thermistors S93 liquid pipe thermistors Pull out the clamp When reassembling insert each clamp of the themistors into one of the holes as below When reassembling insert each clamp into the holes When reassembling the thermistor harness should be placed between the electrical box and the reactor harness as below Step Procedure Points R17398 S8...

Page 214: ...Outdoor Unit 2MXS18GVJU Removal Procedure 206 4 Disconnect the relay connector of the compressor 5 Release the clamp with pliers 6 Disconnect the reactor lead wires Step Procedure Points R17065 R17066 R2170 Reactor ...

Page 215: ...al box 1 Remove the screw of the shield plate 2 Unfasten the 2 hooks and remove the shield plate 3 Remove the screw on the right side of the electrical box 4 Remove the screw on the front side of the electrical box Step Procedure Points R17345 Shield plate R17346 Hook R10361 R17402 ...

Page 216: ... 5 Remove the drip proof cover 6 Disconnect the connector for the fan motor S70 from the inverter PCB MID2 Release the fan motor lead wire from the hooks 7 Remove the electrical box Step Procedure Points R2174 Drip proof cover Inverter PCB MID2 S70 R2175 R2176 ...

Page 217: ...emove the screw of the main PCB and unfasten the 2 hooks When reassembling insert the base bar into the hole of the main PCB 2 Unfasten the hook of the terminal board and open the terminal board 3 Disconnect each connector S11 HE HL HN on the back of the terminal board 4 Disconnect the connectors S52 S102 from the service monitor PCB Main PCB R2177 Base bar R2178 Hook S11 HL HN R17403 HE R17347 S1...

Page 218: ...up the main PCB 6 Disconnect the connectors S31 S32 S33 S71 H1 H2 7 The figure shows the main PCB Refer to page 30 for detail Step Procedure Points R2181 S31 S71 S33 R10362 H1 yellow S32 H2 blue R10363 S80 S21 S20 S40 S31 S71 S33 S32 H2 H1 FU2 3 15A S90 S92 S93 R10356 ...

Page 219: ... Remove the 7 screws and remove the inverter PCB MID2 Step Procedure Points Priority room setting switch SW4 Wiring error check switch SW3 Forced operation ON OFF switch SW1 NIGHT QUIET mode setting switch SW5 Operation mode switch SW2 Hook Hook R17348 LED A LED 1 LED 2 LED 3 LED 4 FU201 3 15A Inverter PCB MID2 R10355 ...

Page 220: ...n motor and release the fan motor lead wire according to the Removal of Electrical Box When reassembling align the mark of outdoor fan with the D cut section of motor shaft Nut size M6 2 Remove the 2 screws of the fan motor fixing flame When reassembling fix the fan motor lead wire to avoid contact with the outdoor fan 3 Open the 2 hooks and release the fan motor lead wire 4 Remove the 4 screws an...

Page 221: ...sure to wait for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the 5 screws of the right side panel 2 Release the clamp with pliers 3 Remove the 2 screws of the partition plate and remove it Right side panel R10364 R16508 Partition plate R10365 ...

Page 222: ...14 4 Remove the sound blankets top upper top inner outer inner Step Procedure Points Sound blanket top upper Sound blanket inner Sound blanket outer R17405 Sound blanket top inner Carefully remove the sound blanket which is easily torn in the piping section ...

Page 223: ...way valve coil 2 Remove the screw and remove the defrost solenoid valve coil 3 Pull out the electronic expansion valve coil for each room Place the thermistor so that its edge comes up to the edge of the fixture 4 Remove the discharge pipe thermistor Be careful not to lose the fixture for the thermistor Four way valve coil R2194 Defrost solenoid valve coil R2195 Electronic expansion valve coil R21...

Page 224: ...e careful not to lose the clip and fixture for the thermistors 6 Release the wire harnesses S90 outdoor temperature thermistor blue outdoor heat exchanger thermistor gray discharge pipe thermistor black S92 gas pipe thermistor room A black room B gray S93 liquid pipe thermistor room A black room B gray Step Procedure Points R17406 Gas pipe thermistor Liquid pipe thermistor R10369 ...

Page 225: ...the piping by non oxidation brazing 2 It is required to prevent the carbonization of the oil inside the four way valve and the deterioration of the gaskets affected by heat Keep below 248 F 120 C Wrap the four way valve with wet cloth and provide water so that the cloth does not dry In case of difficulty with gas brazing machine 1 Disconnect the brazed part where is easy to disconnect and restore ...

Page 226: ...t solenoid valve Note Do not use a metal saw for cutting pipes or sawdust will enter the circuit When withdrawing the pipes be careful not to pinch them firmly with pliers The pipes may get deformed Provide a protective sheet or a steel plate so that the brazing flame cannot influence peripheries Step Procedure Points f e R12395 ...

Page 227: ...the refrigerant gas Cautions for restoration 1 Restore the piping by non oxidation brazing 2 It is required to prevent the carbonization of the oil inside the four way valve and the deterioration of the gaskets affected by heat Keep below 248 F 120 C Wrap the four way valve with wet cloth and provide water so that the cloth does not dry In case of difficulty with gas brazing machine 1 Disconnect t...

Page 228: ...ure to wait for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the terminal cover 2 Disconnect the compressor lead wires 3 Remove the 2 sheets of putty 4 Remove the 3 nuts Terminal cover R2205 R17408 V yellow W blue N brown U red Putty R10373 ...

Page 229: ...d to prevent the carbonization of the oil inside the four way valve and the deterioration of the gaskets affected by heat Keep below 248 F 120 C Wrap the four way valve with wet cloth and provide water so that the cloth does not dry In case of difficulty with gas brazing machine 1 Disconnect the brazed part where is easy to disconnect and restore 2 Cut pipes on the main unit with a tube cutter in ...

Page 230: ...Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points Appearance features 1 Remove the suction grille The hooks are secured in the clearances of the outdoor heat exchanger fins 1 Unfasten the 2 hooks at the bottom first R6368 Hook Rear side R14612 Suction grille R6370 ...

Page 231: ...Removal Procedure 2 Slide the suction grille downward to unfasten the 3 top hooks 3 Remove the suction grille 2 Remove the top panel 1 Remove the 4 screws on the back and the screw on the left side Step Procedure Points Hook R14613 R6372 Top panel R17409 ...

Page 232: ...oval Procedure 224 2 Remove the 2 screws on the front and the screw on the right side panel 3 Lift the top panel and remove it 3 Remove the right side panel 1 Remove the 5 screws Step Procedure Points R6374 Right side panel R6375 R6376 Right side panel ...

Page 233: ...Outdoor Unit 3MXS24JVJU 4MXS32GVJU SiUS12 928_B 225 Removal Procedure 2 Slide the right side panel downward to unfasten the 2 hooks on the back side Step Procedure Points R6377 Hook R14614 Hook R14615 ...

Page 234: ...ve the 2 screws to remove the service lid This model has a conduit mounting plate 4 Remove the front panel 2 This screw is M5 16 1 Remove the 2 screws 2 Slide the front panel 2 panel downward to unfasten the hook Step Procedure Points R10441 Service lid Screw R10372 Lock nut Conduit Knockout hole R17351 Conduit mounting plate R10629 Front Panel 2 Front Panel 1 R10374 ...

Page 235: ...ront panel 2 5 Remove the front panel 1 Remove the discharge grille and outdoor fan first to remove the front panel 1 1 Remove the 4 screws on the discharge grille 2 Pull the bottom of the discharge grille Step Procedure Points R6383 R10375 R10376 Discharge grille Front Panel 1 R10377 ...

Page 236: ...nward to unfasten the 2 hooks at the top 4 Remove the discharge grille 5 Remove the nut and remove the outdoor fan Nut size M8 When reassembling align the mark of the outdoor fan with the D cut section of the motor shaft Step Procedure Points R17173 Hook R10380 R10381 Outdoor fan 13 mm 0 51 inch R17410 ...

Page 237: ...29 Removal Procedure 6 Remove the 2 screws of the partition plate 1 7 Remove the screw at the bottom left of the front panel 1 8 Remove the screw at the bottom of the left side Step Procedure Points R10382 Partition plate 1 R10383 Front panel 1 R6393 ...

Page 238: ...dure 230 9 Remove the screw at the bottom of the back side 10 The front panel 1 has a hook Lift the front panel 1 11 Remove the front panel 1 Be sure to detach the front panel 1 carefully so as not to deform it Step Procedure Points R6394 R17174 Hook R10385 R6396 ...

Page 239: ...ssembling bundle the wires with clamp When reassembling pass the wires through the partition plate 2 3 Release the holder of the outdoor temperature thermistor The holder is secured in the clearances of the heat exchanger fins Step Procedure Points R10386 Partition plate 2 Rear panel R10387 Hook Room A Room C Room D Room B power supply Clamp Partition plate 2 R17353 R10388 Outdoor temperature ther...

Page 240: ...Unit 3MXS24JVJU 4MXS32GVJU Removal Procedure 232 4 Release the thermistor wire from the groove 5 Remove the 3 screws on the rear panel 6 Remove the screw on the bottom frame Step Procedure Points Groove R10389 R10390 R10391 ...

Page 241: ...US12 928_B 233 Removal Procedure 7 Remove the screw on the stop valve mounting plate 8 Lift the rear panel to unfasten the 2 hooks 9 Remove the rear panel Step Procedure Points R10392 Stop valve mounting plate Hook Hook Hook R12918 R10394 ...

Page 242: ...ait for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the 2 screws to detach the ground wires 2 Disconnect the connector for the fan motor S70 3 Release the fan motor lead wire When reassembling do not use these 2 hooks R10396 S70 R10397 R17268 Fan motor lead wire ...

Page 243: ...ansion valve coils for room A B C D and pull out the clamp A S20 white B S21 red C S22 blue D S23 yellow The 3MXS model does not have S23 When reassembling insert each clamp into the hole 6 Disconnect the connector for the liquid pipe thermistors S93 and pull out the clamp Step Procedure Points S80 Clamp R10398 A B C D Clamp R10399 For the electronic expansion valve coil S93 R17354 Clamp S93 R1040...

Page 244: ...e connector for the thermistors S90 and pull out the clamp When reassembling insert the clamp into the hole 9 The wire harness of the thermistors is hooked under the electrical box Unhook it and pull out the clamp Step Procedure Points S92 R10537 Clamp S92 R17356 S90 R10538 Clamp Thermistor ASSY R17142 Clamp Hook R6420 Fixing position for the thermistor harness When reassembling insert the clamp i...

Page 245: ...emoval Procedure 10 Disconnect the connector for the overload protector S40 11 The wire harness for the compressor is attached to the partition plate 1 by the clamp 12 Pull out the clamp with pliers Step Procedure Points S40 R10539 Clamp R6422 Clamp R6423 ...

Page 246: ...cedure 238 13 Disconnect the relay connector of the compressor 14 Remove the screw on the stop valve mounting plate 15 Remove the screw on the partition plate 1 Step Procedure Points R6469 R10395 Electrical box Stop valve mounting plate R6411 Partition plate 1 ...

Page 247: ... Unit 3MXS24JVJU 4MXS32GVJU SiUS12 928_B 239 Removal Procedure 16 Slide the electrical box leftward to unfasten the hook on the right side 17 Remove the electrical box Step Procedure Points R10401 Hook R10402 ...

Page 248: ...0 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the main PCB 1 Open the cover of the electrical box Unfasten the 4 hooks The hooks are marked with 2 Remove the 3 screws 3 Unfasten the 4 hooks 4 Lift up the main PCB Hook Hook R14617 R6427 R10404 Main PCB R10405 R10406 ...

Page 249: ...service monitor PCB S10 terminal board transmission HR1 HR2 reactor AC1 AC2 terminal board power supply U V W compressor 6 Remove the main PCB 2 Remove the reactor 1 Remove the screw 2 Remove the 3 screws and lift the reactor upward to remove it Step Procedure Points R10407 AC1 AC2 S10 S101 S51 W V U HR2 HR1 R10408 R10409 Reactor R6434 ...

Page 250: ... Remove the service monitor PCB 1 Disconnect the connectors from the service monitor PCB S52 S102 2 Slightly lift the top hook to unfasten it 3 Unfasten the bottom hook to remove the service monitor PCB Step Procedure Points R10410 S102 S52 Service monitor PCB R6436 R6437 ...

Page 251: ...it 3MXS24JVJU 4MXS32GVJU SiUS12 928_B 243 Removal Procedure 4 Remove the terminal board 1 Remove the screw 2 Unfasten the hook 3 Remove the terminal board Step Procedure Points R10411 Terminal board R10412 R10413 ...

Page 252: ...ork Step Procedure Points 1 2 Remove the 2 lower screws of the fan motor Remove the 2 upper screws Be sure to remove the lower screws first If the upper screws are removed first the fan motor may tilt or fall because the center of its gravity is toward the front It may cause injuries 3 Remove the fan motor When reassembling be sure to place the wire harness lower R10414 R6442 2 1 R10542 Fan motor ...

Page 253: ...bling work Step Procedure Points 1 Remove the electronic expansion valve coil 1 Pull the electronic expansion valve coils 2 Remove the thermistors Place the thermistor so that its edge comes up to the edge of the fixture Be careful not to lose the clips for the thermistors 1 Pull out the gas pipe thermistors Electronic expansion valve coil R10415 R17411 Gas pipe thermistor R17412 R6448 Gas pipe th...

Page 254: ... putty and pull out the liquid pipe thermistors Be careful not to lose the fixtures for the thermistors 3 Pull out the outdoor heat exchanger thermistor Step Procedure Points Liquid pipe thermistor R17413 R6450 Liquid pipe thermistor Fixture R10541 Outdoor heat exchanger thermistor ...

Page 255: ...move the clip from the outdoor heat exchanger thermistor Be careful not to lose the clip for the thermistor 5 Slightly open the sound blanket outer 6 Remove the sound blanket top upper Step Procedure Points R6452 Clip R10418 Sound blanket outer R10419 Sound blanket top upper ...

Page 256: ... Procedure 248 7 Remove the discharge pipe thermistor 8 Remove the fixture Be careful not to lose the fixture for the thermistor 3 Remove the four way valve coil 1 Remove the screw Step Procedure Points R10420 Discharge pipe thermistor R10430 Fixture R10431 ...

Page 257: ...Outdoor Unit 3MXS24JVJU 4MXS32GVJU SiUS12 928_B 249 Removal Procedure 2 Remove the four way valve coil Step Procedure Points R10432 Four way valve coil ...

Page 258: ...er supplies before disassembling work Step Procedure Points 1 Open the sound blanket outer 2 Remove the sound blanket top upper The sound blanket is fragile Carefully pass the discharge pipe through it 3 Remove the screw from the partition plate 1 and push the plate to the left slightly for easy work R10433 Sound blanket outer R10434 Sound blanket top upper R10435 Partition plate 1 ...

Page 259: ...e the sound blanket top inner The sound blanket is fragile Carefully pass the discharge pipe through it 6 Open the sound blanket inner and pass it through the part of the mufflers The sound blanket is fragile Be careful of the notches of the compressor mount 3 locations Step Procedure Points R10436 Sound blanket outer R10437 Sound blanket top inner R10438 Mufflers Sound blanket inner ...

Page 260: ...SiUS12 928_B Outdoor Unit 3MXS24JVJU 4MXS32GVJU Removal Procedure 252 7 Remove the sound blanket inner Step Procedure Points R10439 ...

Page 261: ...more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the terminal cover 2 Disconnect the compressor lead wires U red V yellow W blue 3 Remove the overload protector 4 Remove the 2 nuts Disconnect the pipings referring to page 221 R6466 Terminal cover R9471 W blue U red V yellow Overload protector R10440 ...

Page 262: ...ration and Field Settings 1 Pump Down Operation 255 2 Forced Operation 256 3 Wiring Error Check Function 257 4 Trial Operation 259 5 Field Settings 261 5 1 Outdoor Unit 261 5 2 Indoor Unit 264 6 Application of Silicon Grease to a Power Transistor and a Diode Bridge 267 ...

Page 263: ...ng the unit Detail 1 Remove the valve caps from the liquid stop valve and the gas stop valve 2 Carry out forced cooling operation 3 After 5 to 10 minutes close the liquid stop valve with a hexagonal wrench 4 After 2 to 3 minutes close the gas stop valve and stop the forced cooling operation Refer to page 256 for forced operation Gas stop valve Close Liquid stop valve Valve caps Hexagonal wrench R1...

Page 264: ...de 4 The operation mode switch SW2 on the outdoor unit is set to the cooling mode 4 The operation mode switch SW2 on the outdoor unit is set to the heating mode Start Press the forced operation ON OFF switch SW1 on the outdoor unit Operating room All rooms The command is sent to all the rooms where the transmission is normal Only 1 room The command is sent to one of the rooms which can be operate ...

Page 265: ...e service monitor LED indicators start blinking Self correction complete The LED indicators 1 2 18 class 1 3 24 class or 1 4 32 class blink one after another Self correction impossible The LED indicators blink all at the same time Transmission failure occurs at any of the indoor units The indoor unit heat exchanger thermistor is disconnected An indoor unit is in trouble if a trouble occurs during ...

Page 266: ... data on the microcomputer memory Those data can be checked by looking at the service monitor LED indicators when the wiring error checking is over during forced operation at the stop of the system The LED indicators stop blinking when the forced operation is over LED1 Room A wiring LED2 Room B wiring 1st blinking LED Port A piping 2nd blinking LED Port B piping The 1st blinking LED means the room...

Page 267: ...arts operation with the previous operation mode when the circuit breaker is restored In cooling operation select the lowest programmable temperature in heating operation select the highest programmable temperature Trial operation may be disabled in either operation mode depending on the room temperature After trial operation is complete set the temperature to a normal level 26 28 C 78 8 82 4 F in ...

Page 268: ...e TEMP button and the MODE button at the same time 3 Press the MODE button twice T appears on the display to indicate that trial operation is selected 4 Press the MODE button and select the operation mode 5 Trial operation terminates in approx 30 minutes and switches into normal mode To quit a trial operation press the ON OFF button 2 1 5 3 2 3 4 R16394 ...

Page 269: ... starts when all the following conditions are met Priority room setting is made POWERFUL signal from the priority room unit is received Note The operation mode of the priority room unit has precedence Cancellation of control The control function is canceled when the POWERFUL operation mode is switched off or 20 minutes elapse after POWERFUL Operation started R1396 Living room Living room A room A ...

Page 270: ...3 of the connector S15 Setting to cooling only C Short circuit pins 3 and 5 of the connector S15 The following specifications apply to the connector housing and pins JST products Housing VHR 5N Pin SVH 21T 1 1 Note that forced operation is also possible in cooling heating mode COOL mode C HEAT mode H 1 3 5 Arrow view A R17374 The illustration is for 24 32 class models as representative S15 S10 S23...

Page 271: ...ting noise of the outdoor unit at nighttime This function is useful if the customer is worried about the effects of the operating noise on the neighbors However if NIGHT QUIET mode is running cooling capacity is reduced Procedure 1 Remove the SW5 jumper switch on the service monitor PCB of the outdoor unit Once the settings are complete reset the power 2 Install the removed jumper switch as descri...

Page 272: ...ntroller to set the model type Set the DIP switch as shown in the illustration The factory set is the heat pump side Heat pump model Set the DIP switch to H P Cooling only model Set the DIP switch to C O 5 2 2 Temperature Display Switch ARC452 Series You can select Fahrenheit or Celsius for temperature display Press the TEMP and buttons simultaneously for 5 seconds to change the unit of temperatur...

Page 273: ... wired remote controller Refer to the following pages for the appropriate indoor unit and wireless remote controller CTXS FTXS Series 1 Remove the front grille 2 Remove the electrical box 3 Remove the shield plate of the electrical box 4 Cut the address setting jumper JA on the PCB CDXS FDXS Series Cut the jumper JA on PCB CTXS J CTXS FTXS H Series CTXS07LVJU FTXS09 12LVJU FTXS15 18LVJU Address JA...

Page 274: ...26 28 ARC452 series ARC433 series Jumper ADDRESS R12065 EXIST CUT 1 2 Jumper R6573 ADDRESS EXIST CUT 1 2 Jumper on indoor unit PCB Function When connected factory set When cut JB Fan speed setting when compressor stops for thermostat OFF effective only at cooling operation Fan speed setting Remote controller setting Fan speed setting 0 The fan stops JC Power failure recovery function Auto restart ...

Page 275: ...on of the power transistor and the diode bridge Applying the paste should be implemented in accordance with the following instruction Note There is the possibility of failure with smoke in case of bad heat radiation Wipe off the old silicon grease completely on a radiation fin Apply the silicon grease evenly to the whole Do not leave any foreign objects such as solder or paper waste between the po...

Page 276: ...SiUS12 928_B Appendix 268 Part 9 Appendix 1 Piping Diagrams 269 1 1 Indoor Unit 269 1 2 Outdoor Unit 271 2 Wiring Diagrams 273 2 1 Indoor Unit 273 2 2 Outdoor Unit 276 ...

Page 277: ...PIPING 1 4CuT CROSS FLOW FAN FAN MOTOR 5 16CuT INDOOR UNIT 1 2CuT M HEAT EXCHANGER REFRIGERANT FLOW HEATING COOLING 5 8 1 2 A THERMISTOR ON HEAT EXCH FTXS15 FTXS18 FTXS24 4D047162A INDOOR UNIT 1 4 CuT HEAT EXCHANGER CROSS FLOW FAN FIELD PIPING 1 4 CuT M FAN MOTOR FIELD PIPING 3 8 CuT 3 8 CuT REFRIGERANT FLOW COOLING HEATING 4D074606 THERMISTOR ON HEAT EXCH INDOOR UNIT 5 16 CuT DISTRIBUTOR HEAT EXC...

Page 278: ...NG HEATING THERMISTOR ON HEAT EXCH 4D051787 INDOOR UNIT 1 4CuT HEAT EXCHANGER FIELD PIPING 1 4CuT SIROCCO FAN M FAN MOTOR 3 8CuT FIELD PIPING 3 8CuT REFRIGERANT FLOW COOLING HEATING 4D074621 THERMISTOR ONHEATEXCH INDOOR UNIT 1 4 6 4mm CuT HEAT EXCHANGER FIELD PIPING 1 4 6 4mm CuT SIROCCO FAN M FAN MOTOR FIELD PIPING 1 2 12 7mm CuT 1 2 12 7mm CuT REFRIGERANT FLOW COOLING HEATING 4D075271 THERMISTOR...

Page 279: ...ISTOR DE 3D048177A OUTDOOR UNIT HEAT EXCHANGER A 5 16CuT EV RECEIVER HEADER 5 16CuT 5 16CuT HEADER FILTER 5 16CuT 5 16CuT B EV 3 8CuT 5 16CuT 5 16CuT 5 16CuT FILTER 5 16CuT C EV 5 16CuT 5 16CuT 1 2CuT 3 8CuT FILTER 5 16CuT 3 8CuT DISTRIBUTOR DC FAN MOTOR M CAPILLARY TUBE PROPELLER FAN 3 8CuT FILTER 5 8CuT 5 8CuT HEADER 1 2CuT 5 16CuT 1 2CuT 5 16CuT MUFFLER 1 2CuT 5 8CuT 5 8CuT 5 8CuT 5 16CuT REFRI...

Page 280: ...R 1 2CuT 5 16CuT FILTER 5 16CuT 5 16CuT 5 8CuT 5 16CuT EVB EVC EVD FIELD PIPING GAS ROOM D 5 8CuT ROOM C 5 8CuT ROOM B 1 2CuT ROOM A 3 8CuT FIELD PIPING LIQUID ROOM D 1 4CuT ROOM C 1 4CuT ROOM B 1 4CuT ROOM A 1 4CuT LIQUID PIPE THERMISTOR ROOM A LIQUID PIPE THERMISTOR ROOM B LIQUID PIPE THERMISTOR ROOM C LIQUID PIPE THERMISTOR ROOM D MOTOR OPERATED VALVE A MOTOR OPERATED VALVE B MOTOR OPERATED VAL...

Page 281: ...ME GROUND FUSE HARNESS PILOT LAMP FAN MOTOR SWING MOTOR PRINTED CIRCUIT BOARD THERMISTOR CONNECTOR OPERATION SWITCH TERMINAL STRIP PROTECTIVE GROUND 3D038065L PCB4 PCB3 PCB5 LED1 H1P R1T t S37 S38 LED2 H2P LED3 H3P PCB2 S27 S36 S1W S26 S35 S21 S29 S28 PCB1 R2T S32 t RECTIFIER 1 RED M1S M S6 ORG YLW PNK 5 BLU 1 BRN RED M2S S8 M ORG YLW 7 1 3 15A S1 PNK 6 Fu BLU WHT BRN RED BLU ORG H2 H3 H1 INDOOR F...

Page 282: ...OR CENTRALIZED CONTROL SIGNAL RECEIVER 3D045012M 1 X1M PCB1 PCB3 S46 S49 2 H1 BLK 1 1 BLK 1 3 BLK 3 15A WHT OUTDOOR 2 BLK C102 V1 BLK RED 3 H2 MR10 BLK GRN BLK FIELD WIRING BLK C101 BLK H3 9 9 BLK CAUTION FG SW1 S21 t S1 HA 7 RED BZ 4 BLU S25 BLK MS 3 BRN 1 1 PCB4 BLK ORG S36 1 WHT 3 S41 S47 S32 BLK 4 M1F 12 1 16 14 11 1 7 3 1 8 15 5 2 2 13 9 10 6 4 3 BLK BLK BLK BLK BLK PNK PNK PNK BLU BLU BLU RE...

Page 283: ...ONTROL CIRCUIT TERMINAL BLOCK NOISE FILTER FERRITE CORE NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN 3D045012L X1M A1P 1 1 BLK A2P H1 2 WHT 2 F1U 3 V1TR RED 3 OUTDOOR 3 15A LED LED LED S1 S26 GRN H2 1 1 FIELD WIRING H3P H2P H1P GRN YLW H3 CAUTION GND 6 3 1 S21 S1W S1 RED BLK S7 10 10 1 GRY YLW RTH1 S32 2 1 2 1 3 C1 WHT BRN BRN t M t 1...

Page 284: ...DEFROST SOLENOID VALVE COIL PRINTED CIRCUIT BOARD DIODE BRIDGE COMPRESSOR MOTOR FAN MOTOR REACTOR OVERLOAD PROTECTOR CURRENT TRANSFORMER MID1 MID2 SPM MOLDED INTER CONNECT DEVICE SYSTEM POWER MODULE ASSIGNMENTS OF TERMINALS OF THE COMP 3D047948C L1R GRN Z1C GRN Z6C YLW X1M Z5C FU3 7 BLU WHT RED M1F E1 HR1 HR2 E2 L1 SA2 MRM20 3 15A M FU1 V100 V2 Z2C L1 AC1 BLU MRM10 30A BRN L2 L2 6 P 1 BRN 9 8 ORG ...

Page 285: ...M 1 X3M RED BLU YLW MRC M S40 W ROOM B D S93 A S10 X11A BLU 6 FU3 RED Y2E SW2 M1F V9 3 1 3 PCB1 BLU 30A WHT ORG L2 YLW YLW R11T ROOM A YLW 2 SA2 Y4E 1 YLW FU1 5 Y3E Z4C R7T 9 R10T M BLU DISCHARGE 1 V100 3 11 BLU B L1 ORG WHT SHEETMETAL BLK WHT BLK ORG 6 2 BLU SW3 BRN LIQUID PIPE BLU M L1 BRN SW5 AC1 R8T BLU 1 R5T t t t t t t t t t t t POWER SUPPLY 60Hz 208 230V Z1C Z6C X1M X5M Y1E Y4E V2 V3 V5 V9 ...

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