Page 1 SiENBE04-401A Service Manual Inverter Pair Wall Mounted Type C-Series D-Series [Applied Models] Inverter Pair : Cooling Only Inverter Pair : Heat Pump...
Page 2 SiENBE04-401A Inverter Pair C-Series D-Series Cooling Only Indoor Unit FTKS20CVMB(9) ATKS20CVMB(9) FTN20CVMB9 FTKS25CVMB(9)(8) ATKS25CVMB(9) FTN25CVMB9 FTKS35CVMB(9)(8) ATKS35CVMB(9) FTN35CVMB9 FTKS20CAVMB ATKS20DAVMB FTKS25CAVMB ATKS25DAVMB FTKS35CAVMB ATKS35DAVMB Outdoor Unit RKS20CVMB(9) ARKS20CVMB RKH20CVMB9 ARKH20CVMB9 RKS25CVMB(9) ARKS25CVMB RKH25CVMB9 ARKH25CVMB9 RKS35CVMB(9) ARKS35CVMB RKH35CVMB9 ARKH35CVMB9 RN20CVMB9 RKS20C2VMB...
Page 3: Table Of Contents
SiENBE04-401A 1. Introduction .....................v 1.1 Safety Cautions ..................v Part 1 List of Functions ..............1 1. List of Functions ..................2 1.1 High Grade Models ..................2 1.2 Standard Grade Models ................5 1.3 Non-lnverter Models .................9 Part 2 Specifications ..............11 1. Specifications ..................12 1.1 Cooling Only...................12 1.2 Heat Pump .....................20 Part 3 Printed Circuit Board Connector Wiring Diagram ...
Page 4 SiENBE04-401A 3.15 Facility Setting Jumper (cooling at low outdoor temperature) ....71 Part 5 System Configuration............73 1. System Configuration................74 2. Instruction....................75 2.1 Safety precautions..................75 2.2 Names of parts ..................77 2.3 Preparation before Operation..............80 2.4 AUTO · DRY · COOL · HEAT · FAN Operation ........83 2.5 Adjusting the Air Flow Direction .............85 2.6 POWERFUL Operation ................87 2.7 OUTDOOR UNIT SILENT Operation .............88...
Page 5 SiENBE04-401A Part 7 Removal Procedure ............147 1. Indoor Unit...................148 1.1 Removal of Air Filter................148 1.2 Removal of Front Grille ................151 1.3 Removal of Horizontal Blade and Vertical Blade........154 1.4 Removal of Electrical Box, PCB and Swing Motor .......156 1.5 Removal of Heat Exchanger ..............162 1.6 Install of Drain Plug ................165 1.7 Removal of Fan Rotor and Fan Motor..........166 2.
Page 6: Introduction
SiENBE04-401A Introduction 1. Introduction Safety Cautions Be sure to read the following safety cautions before conducting repair work. Cautions and The caution items are classified into “ Warning” and “ Caution”. The “ Warnings Warning” items are especially important since they can lead to death or serious injury if they are not followed closely.
Page 7: Cautions Regarding Products After Repair
Introduction SiENBE04-401A Warning Do not repair the electrical components with wet hands. Working on the equipment with wet hands can cause an electrical shock. Do not clean the air conditioner by splashing water. Washing the unit with water can cause an electrical shock. Be sure to provide the grounding when repairing the equipment in a humid or wet place, to avoid electrical shocks.
Page 8: Inspection After Repair
SiENBE04-401A Introduction Warning Be sure to use the specified cable to connect between the indoor and outdoor units. Make the connections securely and route the cable properly so that there is no force pulling the cable at the connection terminals. Improper connections can cause excessive heat generation or fire.
Page 9: Using Icons
Introduction SiENBE04-401A Warning Do not use a joined power cable or extension cable, or share the same power outlet with other electrical appliances, since it can cause an electrical shock, excessive heat generation or fire. Caution Check to see if the parts and wires are mounted and connected properly, and if the connections at the soldered or crimped terminals are secure.
Page 10: Part 1 List Of Functions
SiENBE04-401A Part 1 List of Functions 1. List of Functions ..................2 1.1 High Grade Models ..................2 1.2 Standard Grade Models ................5 1.3 Non-lnverter Models .................9 List of Functions...
Page 11: List Of Functions
List of Functions SiENBE04-401A 1. List of Functions High Grade Models Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter with Bacteriostatic, — — –10 –10 Virustatic Functions Operation Limit for Cooling (°CDB) Basic –15 Function Operation Limit for Heating (°CWB) —...
Page 12 SiENBE04-401A List of Functions Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter with Bacteriostatic, — — –10 –10 Virustatic Functions Operation Limit for Cooling (°CDB) Basic –15 Function Operation Limit for Heating (°CWB) — Photocatalytic Deodorizing Filter —...
Page 13 List of Functions SiENBE04-401A Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter with Bacteriostatic, — — –10 –10 Virustatic Functions Operation Limit for Cooling (°CDB) Basic –15 Function Operation Limit for Heating (°CWB) — Photocatalytic Deodorizing Filter —...
Page 14: Standard Grade Models
SiENBE04-401A List of Functions Standard Grade Models Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter with Bacteriostatic, — — Virustatic Functions Operation Limit for Cooling (°CDB) Basic –10 Function Operation Limit for Heating (°CWB) — Photocatalytic Deodorizing Filter —...
Page 15 List of Functions SiENBE04-401A Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter with Bacteriostatic, — — Virustatic Functions Operation Limit for Cooling (°CDB) Basic –10 Function Operation Limit for Heating (°CWB) — Photocatalytic Deodorizing Filter — —...
Page 16 SiENBE04-401A List of Functions Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter with Bacteriostatic, — — Virustatic Functions Operation Limit for Cooling (°CDB) Basic –10 Function Operation Limit for Heating (°CDB) — Photocatalytic Deodorizing Filter — —...
Page 17 List of Functions SiENBE04-401A Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter with Bacteriostatic, — — Virustatic Functions Operation Limit for Cooling (°CDB) Basic –10 Function Operation Limit for Heating (°CDB) — Photocatalytic Deodorizing Filter — —...
Page 18: Non-Lnverter Models
SiENBE04-401A List of Functions Non-lnverter Models Category Functions Category Functions Air Purifying Filter with Bacteriostatic, Inverter (with Inverter Power Control) — — — — Virustatic Functions Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — — Basic Function –10 Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
Page 19 List of Functions SiENBE04-401A List of Functions...
Page 20: Part 2 Specifications
SiENBE04-401A Part 2 Specifications 1. Specifications ..................12 1.1 Cooling Only...................12 1.2 Heat Pump .....................20 Specifications...
Page 21: Specifications
Specifications SiENBE04-401A 1. Specifications Cooling Only 1.1.1 High Grade Models 50Hz 230V Indoor Units FTKS20CVMB(9) FTKS25CVMB(9)(8) FTKS35CVMB(9)(8) Models Outdoor Units RKS20CVMB(9) RKS25CVMB(9) RKS35CVMB(9) 2.0 (1.3~3.0) 2.5 (1.3~3.0) 3.4 (1.4~3.8) Capacity Btu/h 6,800 (4,450~10,250) 8,550 (4,450~10,250) 11,600 (4,750~12,950) Rated (Min.~Max.) kcal/h...
Page 22 SiENBE04-401A Specifications 50Hz 230V Indoor Units ATKS20CVMB(9) ATKS25CVMB(9) ATKS35CVMB(9) Models Outdoor Units ARKS20CVMB ARKS25CVMB ARKS35CVMB 2.0 (1.3~3.0) 2.5 (1.3~3.0) 3.4 (1.4~3.8) Capacity Btu/h 6,800 (4,450~10,250) 8,550 (4,450~10,250) 11,600 (4,750~12,950) Rated (Min.~Max.) kcal/h 1,720 (1,120~2,580) 2,150 (1,120~2,580) 2,920 (1,200~3,270) Moisture Removal Running Current (Rated) Power Consumption 500 (300~980)
Page 23 Specifications SiENBE04-401A 50Hz 230V Indoor Units FTKS20CAVMB FTKS25CAVMB FTKS35CAVMB Models Outdoor Units RKS20C2VMB RKS25C2VMB RKS35C2VMB 2.0 (1.3~3.0) 2.5 (1.3~3.0) 3.4 (1.4~3.8) Capacity Btu/h 6,800 (4,450~10,250) 8,550 (4,450~10,250) 11,600 (4,750~12,950) Rated (Min.~Max.) kcal/h 1,720 (1,120~2,580) 2,150 (1,120~2,580) 2,920 (1,200~3,270) Moisture Removal Running Current (Rated) Power Consumption 500 (300~980)
Page 24 SiENBE04-401A Specifications 1.1.2 Standard Grade Models 50Hz 230V Indoor Units FTKS20CVMB(9) FTKS25CVMB(9)(8) FTKS35CVMB(9)(8) Models Outdoor Units RKH20CVMB9 RKH25CVMB9 RKH35CVMB9 2.0 (1.3~2.6) 2.25 (1.3~3.0) 3.15 (1.4~3.8) Capacity Btu/h 6,800 (4,450~8,850) 7,650 (4,450~10,250) 10,750 (4,750~12,950) Rated (Min.~Max.) kcal/h 1,720 (1,120~2,240) 1,940 (1,120~2,580)
Page 25 Specifications SiENBE04-401A 50Hz 230V Indoor Units ATKS20CVMB(9) ATKS25CVMB(9) ATKS35CVMB(9) Models Outdoor Units ARKH20CVMB9 ARKH25CVMB9 ARKH35CVMB9 2.0 (1.3~2.6) 2.25 (1.3~3.0) 3.15 (1.4~3.8) Capacity Btu/h 6,800 (4,450~8,850) 7,650 (4,450~10,250) 10,750 (4,750~12,950) Rated (Min.~Max.) kcal/h 1,720 (1,120~2,240) 1,940 (1,120~2,580) 2,710 (1,200~3,270) Moisture Removal Running Current (Rated) Power Consumption 620 (430~945)
Page 26 SiENBE04-401A Specifications 50Hz 230V Indoor Units FTKS20CAVMB FTKS25CAVMB FTKS35CAVMB Models Outdoor Units RKH20CAVMB RKH25CAVMB RKH35CAVMB 2.0 (1.3~2.6) 2.25 (1.3~3.0) 3.15 (1.4~3.8) Capacity Btu/h 6,800 (4,450~8,850) 7,650 (4,450~10,250) 10,750 (4,750~12,950) Rated (Min.~Max.) kcal/h 1,720 (1,120~2,240) 1,940 (1,120~2,580) 2,710 (1,200~3,270) Moisture Removal Running Current (Rated) Power Consumption 620 (430~945)
Page 27 Specifications SiENBE04-401A 50Hz 230V Indoor Units ATKS20DAVMB ATKS25DAVMB ATKS35DAVMB Models Outdoor Units ARKH20CAVMB ARKH25CAVMB ARKH35CAVMB 2.0 (1.3~2.6) 2.25 (1.3~3.0) 3.15 (1.4~3.8) Capacity Btu/h 6,800 (4,450~8,850) 7,650 (4,450~10,250) 10,750 (4,750~12,950) Rated (Min.~Max.) kcal/h 1,720 (1,120~2,240) 1,940 (1,120~2,580) 2,710 (1,200~3,270) Moisture Removal Running Current (Rated) Power Consumption 620 (430~945)
Page 28 SiENBE04-401A Specifications 1.1.3 Non-lnverter Models 50Hz 230V Indoor Units FTN20CVMB9 FTN25CVMB9 FTN35CVMB9 Models Outdoor Units RN20CVMB9 RN25CVMB9 RN35CVMB9 2.25 3.15 Capacity Btu/h 6,800 7,650 10,750 Rated (Min.~Max.) kcal/h 1,720 1,940 2,710 Moisture Removal Running Current (Rated) Power Consumption 1,045 Rated (Min.~Max.) Power Factor 81.7 82.3...
Page 29: Heat Pump
Specifications SiENBE04-401A Heat Pump 1.2.1 High Grade Models 50Hz 230V Indoor Units FTXS20CVMB(9) FTXS25CVMB(9)(8) Models RXS20CVMB(9) RXS25CVMB(9) Outdoor Units Cooling Heating Cooling Heating 2.0 (1.3~3.0) 2.7 (1.3~4.5) 2.5 (1.3~3.0) 3.4 (1.3~4.5) Capacity Btu/h 6,800 (4,450~10,250) 9,200 (4,450~15,350) 8,550 (4,450~10,250) 11,600 (4,450~15,350) Rated (Min.~Max.) kcal/h 1,720 (1,120~2,580)
Page 30: Ftxs35Cvmb(9)(8)
SiENBE04-401A Specifications 50Hz 230V Indoor Units FTXS35CVMB(9)(8) Models RXS35CVMB(9) Outdoor Units Cooling Heating 3.4 (1.4~3.8) 4.0 (1.4~5.0) Capacity Btu/h 11,600 (4,750~12,950) 13,650 (4,750~17,050) Rated (Min.~Max.) kcal/h 2,920 (1,200~3,270) 3,440 (1,200~4,300) Moisture Removal — Running Current (Rated) Power Consumption 1,060 (300~1,300) 1,170 (310~1,590) Rated (Min.~Max.) Power Factor...
Page 31 Specifications SiENBE04-401A 50Hz 230V Indoor Units ATXS20CVMB(9) ATXS25CVMB(9) Models ARXS20CVMB ARXS25CVMB Outdoor Units Cooling Heating Cooling Heating 2.0 (1.3~3.0) 2.7 (1.3~4.5) 2.5 (1.3~3.0) 3.4 (1.3~4.5) Capacity Btu/h 6,800 (4,450~10,250) 9,200 (4,450~15,350) 8,550 (4,450~10,250) 11,600 (4,450~15,350) Rated (Min.~Max.) kcal/h 1,720 (1,120~2,580) 2,320 (1,120~3,870) 2,150 (1,120~2,580) 2,920 (1,120~3,870)
Page 32 SiENBE04-401A Specifications 50Hz 230V Indoor Units ATXS35CVMB(9) Models ARXS35CVMB Outdoor Units Cooling Heating 3.4 (1.4~3.8) 4.0 (1.4~5.0) Capacity Btu/h 11,600 (4,750~12,950) 13,650 (4,750~17,050) Rated (Min.~Max.) kcal/h 2,920 (1,200~3,270) 3,440 (1,200~4,300) Moisture Removal — Running Current (Rated) Power Consumption 1,060 (300~1,300) 1,170 (310~1,590) Rated (Min.~Max.) Power Factor...
Page 33 Specifications SiENBE04-401A 50Hz 230V Indoor Units FTXS20CAVMB FTXS25CAVMB Models RXS20C2VMB RXS25C2VMB Outdoor Units Cooling Heating Cooling Heating 2.0 (1.3~3.0) 2.7 (1.3~4.5) 2.5 (1.3~3.0) 3.4 (1.3~4.5) Capacity Btu/h 6,800 (4,450~10,250) 9,200 (4,450~15,350) 8,550 (4,450~10,250) 11,600 (4,450~15,350) Rated (Min.~Max.) kcal/h 1,720 (1,120~2,580) 2,320 (1,120~3,870) 2,150 (1,120~2,580) 2,920 (1,120~3,870)
Page 34 SiENBE04-401A Specifications 50Hz 230V Indoor Units FTXS35CAVMB Models RXS35C2VMB Outdoor Units Cooling Heating 3.4 (1.4~3.8) 4.0 (1.4~5.0) Capacity Btu/h 11,600 (4,750~12,950) 13,650 (4,750~17,050) Rated (Min.~Max.) kcal/h 2,920 (1,200~3,270) 3,440 (1,200~4,300) Moisture Removal — Running Current (Rated) Power Consumption 1,060 (300~1,300) 1,170 (310~1,590) Rated (Min.~Max.) Power Factor...
Page 35 Specifications SiENBE04-401A 1.2.2 Standard Grade Models 50Hz 230V Indoor Units FTXS20CVMB(9) FTXS25CVMB(9)(8) Models RXH20CVMB9 RXH25CVMB9 Outdoor Units Cooling Heating Cooling Heating 2.0 (1.3~2.6) 2.6 (1.3~4.0) 2.25 (1.3~3.0) 2.85 (1.3~4.5) Capacity Btu/h 6,800 (4,450~8,850) 8,850 (4,450~13,650) 7,650 (4,450~10,250) 9,700 (4,450~15,350) Rated (Min.~Max.) kcal/h 1,720 (1,120~2,240) 2,240 (1,120~3,440)
Page 36 SiENBE04-401A Specifications 50Hz 230V Indoor Units FTXS35CVMB(9)(8) Models RXH35CVMB9 Outdoor Units Cooling Heating 3.15 (1.4~3.8) 3.6 (1.4~5.0) Capacity Btu/h 10,750 (4,750~12,950) 12,300 (4,750~17,050) Rated (Min.~Max.) kcal/h 2,710 (1,200~3,270) 3,100 (1,200~4,300) Moisture Removal — Running Current (Rated) Power Consumption 1,045 (460~1,425) 1,055 (405~1,900) Rated (Min.~Max.) Power Factor...
Page 37 Specifications SiENBE04-401A 50Hz 230V Indoor Units ATXS20CVMB(9) ATXS25CVMB(9) Models ARXH20CVMB9 ARXH25CVMB9 Outdoor Units Cooling Heating Cooling Heating 2.0 (1.3~2.6) 2.6 (1.3~4.0) 2.25 (1.3~3.0) 2.85 (1.3~4.5) Capacity Btu/h 6,800 (4,450~8,850) 8,850 (4,450~13,650) 7,650 (4,450~10,250) 9,700 (4,450~15,350) Rated (Min.~Max.) kcal/h 1,720 (1,120~2,240) 2,240 (1,120~3,440) 1,940 (1,120~2,580) 2,450 (1,120~3,870)
Page 38 SiENBE04-401A Specifications 50Hz 230V Indoor Units ATXS35CVMB(9) Models ARXH35CVMB9 Outdoor Units Cooling Heating 3.15 (1.4~3.8) 3.6 (1.4~5.0) Capacity Btu/h 10,750 (4,750~12,950) 12,300 (4,750~17,050) Rated (Min.~Max.) kcal/h 2,710 (1,200~3,270) 3,100 (1,200~4,300) Moisture Removal — Running Current (Rated) Power Consumption 1,045 (460~1,425) 1,055 (405~1,900) Rated (Min.~Max.) Power Factor...
Page 39 Specifications SiENBE04-401A 50Hz 230V Indoor Units FTXS20CAVMB FTXS25CAVMB Models RXH20CAVMB RXH25CAVMB Outdoor Units Cooling Heating Cooling Heating 2.0 (1.3~2.6) 2.6 (1.3~4.0) 2.25 (1.3~3.0) 2.85(1.3~4.5) Capacity Btu/h 6,800 (4,450~8,850) 8,850 (4,450~13,650) 7,650 (4,450~10,250) 9,700 (4,450~15,350) Rated (Min.~Max.) kcal/h 1,720 (1,120~2,240) 2,240 (1,120~3,440) 1,940 (1,120~2,580) 2,450 (1,120~3,870) Moisture Removal...
Page 40 SiENBE04-401A Specifications 50Hz 230V Indoor Units FTXS35CAVMB Models RXH35CAVMB Outdoor Units Cooling Heating 3.15 (1.4~3.8) 3.6 (1.4~5.0) Capacity Btu/h 10,750 (4,750~12,950) 12,300 (4,750~17,050) Rated (Min.~Max.) kcal/h 2,710 (1,200~3,270) 3,100 (1,200~4,300) Moisture Removal — Running Current (Rated) Power Consumption 1,045 (460~1,425) 1,055 (405~1,900) Rated (Min.~Max.) Power Factor...
Page 41 Specifications SiENBE04-401A 50Hz 230V Indoor Units ATXS20DAVMB ATXS25DAVMB Models ARXH20CAVMB ARXH25CAVMB Outdoor Units Cooling Heating Cooling Heating 2.0 (1.3~2.6) 2.6 (1.3~4.0) 2.25 (1.3~3.0) 2.85 (1.3~4.5) Capacity Btu/h 6,800 (4,450~8,850) 8,850 (4,450~13,650) 7,650 (4,450~10,250) 9,700 (4,450~15,350) Rated (Min.~Max.) kcal/h 1,720 (1,120~2,240) 2,240 (1,120~3,440) 1,940 (1,120~2,580) 2,450 (1,120~3,870)
Page 42 SiENBE04-401A Specifications 50Hz 230V Indoor Units ATXS35DAVMB Models ARXH35CAVMB Outdoor Units Cooling Heating 3.15 (1.4~3.8) 3.6 (1.4~5.0) Capacity Btu/h 10,750 (4,750~12,950) 12,300 (4,750~17,050) Rated (Min.~Max.) kcal/h 2,710 (1,200~3,270) 3,100 (1,200~4,300) Moisture Removal — Running Current (Rated) Power Consumption 1,045 (460~1,425) 1,055 (405~1,900) Rated (Min.~Max.) Power Factor...
Page 43 Specifications SiENBE04-401A 1.2.3 Non-lnverter Models 50Hz 230V Indoor Units FTYN20CVMB9 FTYN25CVMB9 Models RYN20CVMB9 RYN25CVMB9 Outdoor Units Cooling Heating Cooling Heating 2.25 2.85 Capacity Btu/h 6,800 8,850 7,650 9,700 Rated (Min.~Max.) kcal/h 1,720 2,240 1,940 2,450 Moisture Removal — — Running Current (Rated) Power Consumption Rated (Min.~Max.) Power Factor...
Page 44 SiENBE04-401A Specifications 50Hz 230V Indoor Units FTYN35CVMB9 Models RYN35CVMB9 Outdoor Units Cooling Heating 3.15 Capacity Btu/h 10,750 12,300 Rated (Min.~Max.) kcal/h 2,710 3,100 Moisture Removal — Running Current (Rated) Power Consumption 1,045 1,055 Rated (Min.~Max.) Power Factor 92.7 93.6 COP (Rated) 3.01 3.41 φ...
Page 45 Specifications SiENBE04-401A Specifications...
Page 46: Part 3 Printed Circuit Board Connector Wiring Diagram
SiENBE04-401A Part 3 Printed Circuit Board Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram........38 1.1 Indoor Unit....................38 1.2 Outdoor Unit / RK(X)S-C, ARK(X)S-C............40 1.3 Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C ........42 Printed Circuit Board Connector Wiring Diagram...
Page 47: Printed Circuit Board Connector Wiring Diagram
Printed Circuit Board Connector Wiring Diagram SiENBE04-401A 1. Printed Circuit Board Connector Wiring Diagram Indoor Unit Connectors 1) S1 Connector for fan motor 2) S6 Connector for swing motor (horizontal blades) 3) S7 Connector for fan motor (Hall IC) 4) S21 Connector for centralized control (HA) 5) S26 Connector for signal receiver PCB...
Page 48 SiENBE04-401A Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Control PCB PCB(2): Signal Receiver PCB Control PCB Signal Receiver PCB LED1 LED2 LED3 RTH1 5V Check 12V Check LED A (R4987) PCB(3): INTELLIGENT EYE sensor PCB (Inverter models only) (R4988) Printed Circuit Board Connector Wiring Diagram...
Page 49: Outdoor Unit / Rk(X)S-C, Ark(X)S-C
Printed Circuit Board Connector Wiring Diagram SiENBE04-401A Outdoor Unit / RK(X)S-C, ARK(X)S-C Connectors 1) S10 Connector for filter PCB 2) S11 Connector for control PCB 3) S20 Connector for electronic expansion valve coil 4) S30 Connector for compressor motor 5) S40 Connector for overload protector 6) S70 Connector for fan motor...
Page 50 SiENBE04-401A Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Control PCB (outdoor unit) S40 LED A S90 FU2(3.15A) (R4989) FU1(3.15A) PCB(2): Filter PCB FU3(20A) (R3323) Printed Circuit Board Connector Wiring Diagram...
Page 51: Outdoor Unit / Rk(X)H-C, Ark(X)H-C, R(Y)N-C
Printed Circuit Board Connector Wiring Diagram SiENBE04-401A Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C Connectors 1) S20 Connector for electronic expansion valve 2) S70 Connector for fan motor 3) S80 Connector for four way valve 4) S90 Connector for thermistors (outdoor air, heat exchanger, discharge pipe) Other designations Note:...
Page 52: Part 4 Function And Control
SiENBE04-401A Part 4 Function and Control 1. Main Functions..................44 1.1 Frequency Principle................44 1.2 Power-Airflow Dual Flaps, Wide-Angle Louvres and Auto-Swing ..46 1.3 Fan Speed Control for Indoor Units............47 1.4 Programme Dry Function ...............48 1.5 Automatic Operation................49 1.6 NIGHT SET Mode ..................50 1.7 INTELLIGENT EYE ................51 1.8 HOME LEAVE Operation ...............53 1.9 Inverter POWERFUL Operation .............54...
Page 53: Main Functions
Main Functions SiENBE04-401A 1. Main Functions Note: See the list of functions for the functions applicable to different models. Frequency Principle The compressor is frequency-controlled during normal operation. The target frequency is set by Main Control the following 2 parameters coming from the operating indoor unit: Parameters The load condition of the operating indoor unit The difference between the room temperature and the set temperature...
Page 54 SiENBE04-401A Main Functions The inverter provides the following features: Inverter Features The regulating capacity can be changed according to the changes in the outdoor air temperature and cooling / heating load. Quick heating and quick cooling The compressor rotational speed is increased when starting the heating (or cooling). This enables a quick set temperature.
Page 55: Power-Airflow Dual Flaps, Wide-Angle Louvres And Auto-Swing
Main Functions SiENBE04-401A Power-Airflow Dual Flaps, Wide-Angle Louvers and Auto-Swing The large flaps send a large volume of air downwards to the floor. The flap provides an optimum Power-Airflow control area in cooling, heating and dry mode. Dual Flaps Heating Mode During heating mode, the large flap enables direct warm air straight downwards.
Page 56: Fan Speed Control For Indoor Units
SiENBE04-401A Main Functions Fan Speed Control for Indoor Units The airflow rate can be automatically controlled depending on the difference between the set Control Mode temperature and the room temperature. This is done through phase control and Hall IC control. For more information about Hall IC, refer to trouble shooting for fan motor on page 113.
Page 57: Programme Dry Function
Main Functions SiENBE04-401A Programme Dry Function Programme dry function removes humidity while preventing the room temperature from lowering. Since the microcomputer controls both the temperature and air flow volume, the temperature adjustment and fan adjustment buttons are inoperable in this mode. The microcomputer automatically sets the temperature and fan settings.
Page 58: Automatic Operation
SiENBE04-401A Main Functions Automatic Operation Automatic Cooling / Heating Function (Heat Pump Only) When the AUTO mode is selected with the remote control, the microcomputer automatically determines the operation mode from cooling and heating according to the room temperature and setting temperature at the time of the operation startup, and automatically operates in that mode.
Page 59: Night Set Mode
Main Functions SiENBE04-401A NIGHT SET Mode When the OFF timer is set, the NIGHT SET circuit automatically activates. The NIGHT SET circuit maintains the airflow setting made by users. The NIGHT SET circuit continues heating or cooling the room at the set temperature for the first The NIGHT SET one hour, then automatically raises the temperature setting slightly in the case of cooling, or Circuit...
Page 60: Intelligent Eye
SiENBE04-401A Main Functions INTELLIGENT EYE This is the function that detects existence of humans in the room by a human motion sensor (INTELLIGENT EYE) and reduces the capacity when there is no human in the room in order to save electricity. Processing 1.
Page 61 Main Functions SiENBE04-401A Since the set temperature is shifted by 2°C higher for 40 minutes, compressor speed becomes low and can realize energy saving operation. But as thermostat is prone to be off by the fact that the set temperature has been shifted, the thermostat-off action is prohibited in 40 minutes so as to prevent this phenomena.
Page 62: Home Leave Operation
SiENBE04-401A Main Functions HOME LEAVE Operation In order to respond to the customer's need for immediate heating and cooling of the room after Outline returning home or for house care, a measure to switch the temperature and air volume from that for normal time over to outing time by one touch is provided.
Page 63: Inverter Powerful Operation
Main Functions SiENBE04-401A Inverter POWERFUL Operation In order to exploit the cooling and heating capacity to full extent, operate the air conditioner by Outline increasing the indoor fan rotating speed and the compressor frequency. When POWERFUL button is pushed in each operation mode, the fan speed / setting Details of the temperature will be converted to the following states in a period of twenty minutes.
Page 64: Other Functions
SiENBE04-401A Main Functions 1.10 Other Functions 1.10.1 Hot Start Function Heat Pump Only In order to prevent the cold air blast that normally comes when heating is started, the temperature of the heat exchanger of the indoor unit is detected, and either the air flow is stopped or is made very weak thereby carrying out comfortable heating of the room.
Page 65: Function Of Main Structural Parts
Function of Main Structural Parts SiENBE04-401A 2. Function of Main Structural Parts Function of Thermistor 2.1.1 Heat Pump Model Four way valve Compressor (R3305) 1. The outdoor heat exchanger thermistor is used for controlling target discharge temperature. A Outdoor Heat Set a target discharge temperature depending on the outdoor and indoor heat exchanger Exchanger temperature.
Page 66: Cooling Only Model
SiENBE04-401A Function of Main Structural Parts 2.1.2 Cooling Only Model Compressor (R2828) 1. The outdoor heat exchanger thermistor is used for controlling target discharge temperature. A Outdoor Heat Set a target discharge temperature depending on the outdoor and indoor heat exchanger Exchanger temperature.
Page 67: Control Specification
Control Specification SiENBE04-401A 3. Control Specification Mode Hierarchy There are two modes; the mode selected in user’s place (normal air conditioning mode) and Outline forced operation mode for installation and providing service. 1. For heat pump model Detail There are following modes; stop, cooling (includes drying), heating (include defrosting) Air conditioner control mode Forced operating mode Forced cooling (for Pump Down Operation)
Page 68: Frequency Control
SiENBE04-401A Control Specification Frequency Control Frequency will be determined according to the difference between room and set temperature. Outline The function is explained as follows. 1. How to determine frequency. 2. Frequency command from an indoor unit. (The difference between a room temperature and the temperature set by the remote control.) 3.
Page 69 Control Specification SiENBE04-401A 2. Determine upper limit frequency Set a minimum value as an upper limit frequency among the frequency upper limits of the following functions: Compressor protection, input current, discharge pipes, freeze-up protection, dew prevention, fin thermistor temperature. 3. Determine lower limit frequency Set a maximum value as an lower limit frequency among the frequency lower limits of the following functions: Pressure difference upkeep.
Page 70: Controls At Mode Changing / Start-Up
SiENBE04-401A Control Specification Controls at Mode Changing / Start-up 3.3.1 Preheating Operation Operate the inverter in the open phase operation with the conditions including the preheating Outline command from the discharge pipe temperature. Detail Preheating ON Condition When the discharge pipe temperature is below 10şC, inverter in open phase operation starts.
Page 71: Discharge Pipe Control
Control Specification SiENBE04-401A 3.3.4 3-minutes Standby Prohibit to turn ON the compressor for 3 minutes after turning it off. (Except when defrosting. (Only for Heat Pump Model).) 3.3.5 Compressor Protection Function When turning the compressor from OFF to ON, the upper limit of frequency must be set as follows.
Page 72: Input Current Control
SiENBE04-401A Control Specification Input Current Control Detect an input current by the CT during the compressor is running, and set the frequency Outline upper limit from such input current. In case of heat pump model, this control is the upper limit control function of the frequency which takes priority of the lower limit of four way valve activating compensation.
Page 73: Heating Peak-Cut Control
Control Specification SiENBE04-401A Heating Peak-cut Control Outline Heat Pump Only During heating operation, the signals being sent from the indoor unit allow the operating frequency limitation and prevent abnormal high pressure. (The signal from the indoor unit must be divided as follows.) Detail Conditions for Start Controlling Judge the controlling start with the indoor heat exchanger temperature after 2 sec.
Page 74: Defrost Control
SiENBE04-401A Control Specification 3.10 Defrost Control Outline Heat Pump Only Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoor heat exchanger temperature must be more than its fixed value when finishing. Detail Conditions for Starting Defrost The starting conditions must be made with the outdoor air temperature and heat exchanger temperature.
Page 75: Electronic Expansion Valve Control
Control Specification SiENBE04-401A 3.11 Electronic Expansion Valve Control The following items are included in the electronic expansion valve control. Outline Electronic expansion valve is fully closed 1. Electronic expansion valve is fully closed when turning on the power. 2. Pressure equalizing control Open Control 1.
Page 76 SiENBE04-401A Control Specification 3.11.1 Fully Closing with Power ON Initialize the electronic expansion valve when turning on the power, set the opening position and develop pressure equalizing. 3.11.2 Pressure Equalization Control When the compressor is stopped, open and close the electronic expansion valve and develop pressure equalization.
Page 77 Control Specification SiENBE04-401A 3.11.7 Control when frequency is changed When the target discharge pipe temperature control is active, if the target frequency is changed for a specified value in a certain time period, cancel the target discharge pipe temperature control and change the target opening of the electronic expansion valve according to the shift. 3.11.8 Target Discharge Pipe Temperature Control Obtain the target discharge pipe temperature from the indoor and outdoor heat exchanger temperature, and adjust the electronic expansion valve opening so that the actual discharge...
Page 78: Malfunctions
SiENBE04-401A Control Specification 3.12 Malfunctions 3.12.1 Sensor Malfunction Detection Sensor malfunction may occur in the thermistor. Relating to Thermistor Malfunction 1. Outdoor heat exchanger thermistor 2. Discharge pipe thermistor 3. Fin thermistor 4. Outdoor air thermistor 3.12.2 Detection of Overload and Over Current In order to protect the inverter, detect an excessive output current, and for protecting Outline compressor, monitor the OL operation.
Page 79: Forced Operation Mode
Control Specification SiENBE04-401A Detail I Judgment by power consumption When an output frequency is exceeds 55 Hz and the input current is less than specified value, the adjustment is made for insufficient gas. II Judgment by discharge pipe temperature When discharge pipe temperature is 20°C higher than target value and the electronic expansion value opening is 450 pulses (max.), the adjustment is made for insufficient gas.
Page 80: Facility Setting Jumper (Cooling At Low Outdoor Temperature)
SiENBE04-401A Control Specification 3.15 Facility Setting Jumper (cooling at low outdoor temperature) This function is limited only for facilities (the target of air conditioning is equipment (such as Outline computer)). Never use it in a residence or office (the space where there is a human). You can expand the operation range to –15°C by cutting jumper 8 (J8) on the PCB.
Page 81 Control Specification SiENBE04-401A Function and Control...
Page 82: Part 5 System Configuration
SiENBE04-401A Part 5 System Configuration 1. System Configuration................74 2. Instruction....................75 2.1 Safety precautions..................75 2.2 Names of parts ..................77 2.3 Preparation before Operation..............80 2.4 AUTO · DRY · COOL · HEAT · FAN Operation ........83 2.5 Adjusting the Air Flow Direction .............85 2.6 POWERFUL Operation ................87 2.7 OUTDOOR UNIT SILENT Operation .............88 2.8 HOME LEAVE Operation ...............89...
Page 83: System Configuration
System Configuration SiENBE04-401A 1. System Configuration After the installation and test operation of the room air conditioner have been completed, it should be operated and handled as described below. Every user would like to know the correct method of operation of the room air conditioner, to check if it is capable of cooling (or heating) well, and to know a clever method of using it.
Page 84: Instruction
Do not attempt to repair, relocate, modify or reinstall the air conditioner by yourself. Incorrect work will cause electric shocks, fire etc. For repairs and reinstallation, consult your Daikin dealer for advice and information. • The refrigerant used in the air conditioner is safe. Although leaks should not occur, if for some reason any refrigerant happens to leak into the room, make sure it does not come in contact with any flame as of gas heaters, kerosene heaters or gas range.
Page 85: Installation Site
Instruction SiENBE04-401A • Do not stand or sit on the outdoor unit. Do not place any object on the unit to avoid injury, do not remove the fan guard. • Do not place anything under the indoor or outdoor unit that must be kept away from moisture. In certain conditions, moisture in the air may condense and drip.
Page 86: Names Of Parts
SiENBE04-401A Instruction Names of Parts FTK(X)S 20/25/35/50 D Indoor Unit System Configuration...
Page 87: Outdoor Unit
Instruction SiENBE04-401A Outdoor Unit Indoor Unit 1. Air filter 12. Indoor Unit ON/OFF switch: (page 10.) • Push this switch once to start operation. 2. Air purifying filter with photocatalytic Push once again to stop it.•The operation deodorizing function: • These filters are attached to the inside of mode refers to the following table..
Page 88: Remote Control
SiENBE04-401A Instruction Remote control HOME LEAVE ON/OFF TEMP POWERFUL MODE SWING SILENT SENSOR CANCEL TIMER < > ARC433A1, A2 • It selects the operation mode. 1. Signal transmitter: • It sends signals to the indoor unit. (AUTO/DRY/COOL/HEAT/FAN) (page 10.) 8. SILENT button: for OUTDOOR UNIT SILENT 2.
Page 89: Preparation Before Operation
Instruction SiENBE04-401A Preparation Before Operation To set the batteries 1. Press with a finger and slide the Position + and – correctly! front cover to take it off. 2. Set two dry batteries (AAA). 3. Set the front cover as before. ATTENTION About batteries •...
Page 90 SiENBE04-401A Instruction To operate the remote control • To use the remote control, aim the transmitter at the indoor unit. If there is anything to block signals between the unit and the remote control, such as a curtain, the unit will not operate. Receiver •...
Page 91 Instruction SiENBE04-401A To set the clock 1. Press “CLOCK button”. 0:00 is displayed. blinks. 2. Press “TIMER setting button” to set the clock to the present time. Holding down “ ” or “ ” button rapidly increases or decreases the time display. 3.
Page 92: Auto Dry Cool Heat Fan Operation
SiENBE04-401A Instruction Auto Dry Cool Heat Fan Operation The air conditioner operates with the operation mode of your choice. From the next time on, the air conditioner will operate with the same operation mode. To start operation 1. Press “MODE selector button” and select a operation mode.
Page 93 Instruction SiENBE04-401A To change the air flow rate setting 5. Press “FAN setting button”. DRY mode AUTO or COOL or HEAT or FAN mode The air flow rate setting is not variable Five levels of air flow rate setting from “ ”...
Page 94: Adjusting The Air Flow Direction
SiENBE04-401A Instruction Adjusting the Air Flow Direction You can adjust the air flow direction to increase your comfort. To adjust the horizontal blades (flaps) 1. Press “SWING button”. • The display on the LCD and the flaps will begin to swing. 2.
Page 95 Instruction SiENBE04-401A To adjust the vertical blades (louvres) Hold the knob and move the louvers. (You will find a knob on the left-side and the right-side blades.) Notes on flaps and louvres angles • When “SWING button” is selected, the flaps swinging range depends In DRY mode or COOL mode on the operation mode.
Page 96: Powerful Operation
SiENBE04-401A Instruction POWERFUL Operation POWERFUL operation quickly maximizes the cooling (heating) effect in any operation mode. You can get the maximum capacity To start POWERFUL operation 1. Press “POWERFUL button”. • POWERFUL operation ends in 20 minutes. Then the system automatically operates again with the settings which were used before POWERFUL operation.
Page 97: Outdoor Unit Silent Operation
Instruction SiENBE04-401A OUTDOOR UNIT SILENT Operation OUTDOOR UNIT SILENT operation lowers the noise level of the outdoor unit by changing the frequency and fan speed on the outdoor unit. This function is convenient during night. To start OUTDOOR UNIT SILENT operation 1.
Page 98: Home Leave Operation
SiENBE04-401A Instruction HOME LEAVE Operation HOME LEAVE operation is a function which allows you to record your preferred temperature and air flow rate settings. To start HOME LEAVE operation 1. Press “HOME LEAVE button”. • The HOME LEAVE lamp lights up. 1, 2 To cancel HOME LEAVE operation HOME LEAVE...
Page 99 Instruction SiENBE04-401A What’s the HOME LEAVE operation Is there a set temperature and air flow rate which is most comfortable, a set temperature and air flow rate which you use the most? HOME LEAVE operation is a function that allows you to record your favorite set temperature and air flow rate.
Page 100: Intelligent Eye Operation
SiENBE04-401A Instruction INTELLIGENT EYE Operation “INTELLIGENT EYE” is the infrared sensor which detects the human movement. To start INTELLIGENT EYE operation 1. Press “SENSOR button”. To cancel the INTELLIGENT EYE operation 2. Press “SENSOR button” again. [EX.] When somebody in the room •...
Page 101 Instruction SiENBE04-401A To adjust the angle of the INTELLIGENT EYE sensor • You can adjust the angle of the INTELLIGENT EYE sensor to increase the detection area. (Adjustable angle: 15° to right and left of centre) INTELLIGENT EYE 15° 15° sensor •...
Page 102: Timer Operation
SiENBE04-401A Instruction 2.10 TIMER Operation Timer functions are useful for automatically switching the air conditioner on or off at night or in the morning. You can also use OFF TIMER and ON TIMER in combination. To use OFF TIMER operation •...
Page 103 Instruction SiENBE04-401A To use ON TIMER operation • Check that the clock is correct. If not, set the clock to the present time. 1. Press “ON TIMER button”. • 6:00 is displayed. • “ “blinks. 2. 2.Press “TIMER Setting button” until the time setting reaches the point you like.
Page 104: Care And Cleaning
SiENBE04-401A Instruction 2.11 Care and cleaning CAUTION Before cleaning, be sure to stop the operation and turn the breaker OFF. UNITS Indoor unit, Outdoor unit and Remote control 1. Wipe them with dry soft cloth. Front grille 1. Open the front grille. •...
Page 105: Air Filter
Instruction SiENBE04-401A FILTERS 1. Open the front panel. 2. Pull out the air filters. • Push a little upwards the tab at the center of each air filter, then pull it down. 3. Take off the Titanium Apatite Photocatalytic Air-Purifying Filter Air purifying filter •...
Page 106: Before A Long Idle Period
SiENBE04-401A Instruction Check Check that the base, stand and other fittings of the outdoor unit are not decayed or corroded. Check that nothing blocks the air inlets and the outlets of the indoor unit and the outdoor unit. Check that the drain comes smoothly out of the drain hose during COOL or DRY operation •...
Page 107: Troubleshooting
Instruction SiENBE04-401A 2.12 Troubleshooting These cases are not troubles The following cases are not air conditioner troubles but have some reasons. You may just continue using it. Case Explanation • This is to protect the air conditioner.You should wait for about 3 minutes. Operation does not start soon.
Page 108: Check Again
SiENBE04-401A Instruction Check again Please check again before calling a repair person.. Case Check • Hasn’t a breaker turned OFF or a fuse blown? The air conditioner does not operate. • Isn’t it a power failure? (OPERATION lamp is off) •...
Page 109 Instruction SiENBE04-401A Call the service shop immediately. WARNING When an abnormality (such as a burning smell) occurs, stop operation and turn the breaker OFF. Continued operation in an abnormal condition may result in troubles, electric shocks or fire. Consult the service shop where you bought the air conditioner. Do not attempt to repair or modify the air conditioner by yourself.
Page 110 SiENBE04-401A Instruction FAULT DIAGNOSIS BY REMOTE CONTROL. In the ARC433A series, the temperature display sections on the main unit indicate corresponding codes. 1. When the TIMER CANCEL button is held down for 5 seconds, a “00” indication flashes on the temperature display section. HOME LEAVE ON/OFF TEMP...
Page 111 Instruction SiENBE04-401A System Configuration...
Page 112: Part 6 Service Diagnosis
SiENBE04-401A Part 6 Service Diagnosis 1. Caution for Diagnosis................104 2. Problem Symptoms and Measures .............105 3. Service Check Function ..............106 4. Troubleshooting ..................109 4.1 Error Codes and Description ..............109 4.2 Indoor Unit PCB Abnormality ...............110 4.3 Freeze-up Protection Control or High Pressure Control.......111 4.4 Fan Motor (AC Motor) or Related Abnormality........113 4.5 Thermistor or Related Abnormality (Indoor Unit)........114 4.6 Signal Transmission Error (between Indoor and Outdoor Unit) ...115...
Page 113: Caution For Diagnosis
Caution for Diagnosis SiENBE04-401A 1. Caution for Diagnosis The operation lamp flashes when any of the following errors is detected. 1. When a protection device of the indoor or outdoor unit is activated or when the thermistor malfunctions, disabling equipment operation. 2.
Page 114: Problem Symptoms And Measures
SiENBE04-401A Problem Symptoms and Measures 2. Problem Symptoms and Measures Symptom Check Item Details of Measure Reference Page None of the Units Check the power supply. Check to make sure that the rated voltage is — Operates. supplied. Check the type of the indoor units. Check to make sure that the indoor unit type is —...
Page 115: Service Check Function
Service Check Function SiENBE04-401A 3. Service Check Function In the ARC433A series remote control, the temperature display sections on the main unit indicate corresponding codes. 1. When the timer cancel button is held down for 5 seconds, a “00” indication flashes on the Check Method 1 temperature display section.
Page 116 SiENBE04-401A Service Check Function Check Method 2 1. Enter the diagnosis mode. Press the 3 buttons (TEMP s ,TEMP t , MODE) simultaneously. (R4086) The digit of the number of tens blinks. HTry again from the start when the digit does not blink. (R4087) 2.
Page 117 Service Check Function SiENBE04-401A 5. Press the TEMP button. Press TEMP s or TEMP t and change the digit until you hear the sound of “beep”. (R4088) 6. Diagnose by the sound. H“ pi ” : The both numbers of tens and units do not accord with the error code. H“...
Page 118: Troubleshooting
SiENBE04-401A Troubleshooting 4. Troubleshooting Error Codes and Description Reference Code Indication Description Page System — Normal Insufficient gas Over-voltage detection Signal transmission error (between indoor and outdoor unit) Indoor Indoor unit PCB abnormality Unit Freeze-up protection control or high pressure control Fan motor or related abnormality Heat exchanger temperature thermistor abnormality Room temperature thermistor abnormality...
Page 119: Indoor Unit Pcb Abnormality
Troubleshooting SiENBE04-401A Indoor Unit PCB Abnormality Remote control Display Evaluation of zero-cross detection of power supply by indoor unit. Method of Malfunction Detection When there is no zero-cross detection in approximately 10 continuous seconds. Malfunction Decision Conditions Faulty indoor unit PCB Supposed Faulty connector connection Causes...
Page 120: Freeze-Up Protection Control Or High Pressure Control
SiENBE04-401A Troubleshooting Freeze-up Protection Control or High Pressure Control Remote control Display High pressure control (heat pump model only) Method of During heating operations, the temperature detected by the indoor heat exchanger Malfunction thermistor is used for the high pressure control (stop, outdoor fan stop, etc.) Detection Freeze-up protection control (operation halt) is activated during cooling operation according to the temperature detected by the indoor unit heat exchanger thermistor.
Page 121 Troubleshooting SiENBE04-401A Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 Refer to P.140 Check the air passage. Is there any short-circuit? Provide sufficient air passage. Check the intake air filter. Is it very dirty? Clean the air filter.
Page 122: Fan Motor (Ac Motor) Or Related Abnormality
SiENBE04-401A Troubleshooting Fan Motor (AC Motor) or Related Abnormality Remote control Display The rotation speed detected by the Hall IC during fan motor operation is used to determine Method of abnormal fan motor operation. Malfunction Detection When the detected rotation speed is less than 50% of the HH tap under maximum fan motor Malfunction rotation demand.
Page 123: Thermistor Or Related Abnormality (Indoor Unit)
Troubleshooting SiENBE04-401A Thermistor or Related Abnormality (Indoor Unit) C4, C9 Remote control Display The temperatures detected by the thermistors are used to determine thermistor errors. Method of Malfunction Detection When the thermistor input is more than 4.96 V or less than 0.04 V during compressor Malfunction operation∗.
Page 124: Signal Transmission Error (Between Indoor And Outdoor Unit)
SiENBE04-401A Troubleshooting Signal Transmission Error (between Indoor and Outdoor Unit) Remote control Display The data received from the outdoor unit in indoor unit-outdoor unit signal transmission is Method of checked whether it is normal. Malfunction Detection When the data sent from the outdoor unit cannot be received normally, or when the content of Malfunction the data is abnormal.
Page 125: Ol Activation (Compressor Overload)
Troubleshooting SiENBE04-401A OL Activation (Compressor Overload) Remote control Display A compressor overload is detected through compressor OL. Method of Malfunction Detection If the compressor OL is activated twice, the system will be shut down. Malfunction The error counter will reset itself if this or any other error does not occur during the following Decision 60-minute compressor running time (total time).
Page 126: Compressor Lock
SiENBE04-401A Troubleshooting Compressor Lock Remote control Display A compressor lock is detected by checking the compressor running condition through the Method of position detection circuit. Malfunction Detection The system judges the compressor lock, and stops due to over current. Malfunction The system judges the compressor lock, and cannot operation with position detection within Decision 15 seconds after start up.
Page 127: Dc Fan Lock
Troubleshooting SiENBE04-401A DC Fan Lock Remote control Display A fan motor or related error is detected by checking the high-voltage fan motor rpm being Method of detected by the Hall IC. Malfunction Detection The fan does not start in 30 seconds even when the fan motor is running. Malfunction The system will be shut down if the error occurs 16 times.
Page 128: Input Over Current Detection
SiENBE04-401A Troubleshooting 4.10 Input Over Current Detection Remote control Display An input over-current is detected by checking the input current value with the compressor Method of running. Malfunction Detection The following current with the compressor running continues for 2.5 seconds. Malfunction Cooling Heating: Above 12A...
Page 129: Four Way Valve Abnormality
Troubleshooting SiENBE04-401A 4.11 Four Way Valve Abnormality Remote control Display The indoor air temperature thermistor, the indoor unit heat exchanger thermistor, the outdoor Method of temperature thermistor and the outdoor unit heat exchanger thermistor are checked to see if Malfunction they function within their normal ranges in the operating mode.
Page 130 SiENBE04-401A Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.5 Refer to P.139 Four way valve coil Correct. disconnected (loose)? Check No.6 Refer to P.140 Reconnect. Harness out of connector? Check No.11 Refer to P.143...
Page 131: Discharge Pipe Temperature Control
Troubleshooting SiENBE04-401A 4.12 Discharge Pipe Temperature Control Remote control Display The discharge pipe temperature control (stop, frequency drooping, etc.) is checked with the Method of temperature being detected by the discharge pipe thermistor. Malfunction Detection If a stop takes place 4 times successively due to abnormal discharge pipe temperature, the Malfunction system will be shut down.
Page 132: High Pressure Control In Cooling
SiENBE04-401A Troubleshooting 4.13 High Pressure Control in Cooling Remote control Display High-pressure control (stop, frequency drop, etc.) is activated in the cooling mode if the Method of temperature being sensed by the heat exchanger thermistor exceeds the limit. Malfunction Detection Activated when the temperature being sensed by the heat exchanger thermistor rises above Malfunction 65°C.
Page 133 Troubleshooting SiENBE04-401A Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.4 Check the installation space. Refer to P.138 Check No.7 Abnormal Check No.6 Installation condition Change the air outlet grille check position.
Page 134: Position Sensor Abnormality
SiENBE04-401A Troubleshooting 4.14 Position Sensor Abnormality Remote control Display A compressor startup failure is detected by checking the compressor running condition through Method of the position detection circuit. Malfunction Detection The compressor fails to start in about 15 seconds after the compressor run command signal Malfunction is sent.
Page 135: Dc Voltage / Current Sensor Abnormality
Troubleshooting SiENBE04-401A 4.15 DC Voltage / Current Sensor Abnormality Remote control Display Detecting abnormality of the DC sensor by the running frequency of compressor and by the Method of input current multiplied DC voltage and current. Malfunction Detection The compressor running frequency is below 52 Hz. Malfunction (The input current is also below 0.5 A.) Decision...
Page 136: Thermistor Or Related Abnormality (Outdoor Unit)
SiENBE04-401A Troubleshooting 4.16 Thermistor or Related Abnormality (Outdoor Unit) P4, J3, J6, H9 Remote control Display This type of error is detected by checking the thermistor input voltage to the microcomputer. Method of [A thermistor error is detected by checking the temperature.] Malfunction Detection The thermistor input is above 4.96 V or below 0.04 V with the power on.
Page 137 Troubleshooting SiENBE04-401A Be sure to turn off power switch before connect or disconnect connector, Troubleshooting Caution or parts damage may be occurred. Turn on the power again. Check No.6 Refer to P.140 Error displayed again Reconnect. on remote controller? Connector or thermistor Reconnect.
Page 138: Electrical Box Temperature Rise
SiENBE04-401A Troubleshooting 4.17 Electrical Box Temperature Rise Remote control Display An electrical box temperature rise is detected by checking the radiation fin thermistor with the Method of compressor off. Malfunction Detection With the compressor off, the radiation fin temperature is above 80°C(90°C ). Reset is made Malfunction when the temperature drops below 70°C(80°C ).
Page 139 Troubleshooting SiENBE04-401A Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 Refer to P.140 WARNING Turn off the power and turn it on again. To cool down the electricals, the outdoor unit fan gets started when the radiation fin temperature rises Check No.7...
Page 140: Radiation Fin Temperature Rise
SiENBE04-401A Troubleshooting 4.18 Radiation Fin Temperature Rise Remote control Display A radiation fin temperature rise is detected by checking the radiation fin thermistor with the Method of compressor on. Malfunction Detection If the radiation fin temperature with the compressor on is above 90°C (100°C for (A)RK(X)H, Malfunction R(Y)N models).
Page 141 Troubleshooting SiENBE04-401A Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 Turn off the power and turn it on Refer to P.140 again to get the system started. Check No.7 Refer to P.141 Error displayed again?
Page 142: Output Over Current Detection
SiENBE04-401A Troubleshooting 4.19 Output Over Current Detection Remote control Display An output over-current is detected by checking the current that flows in the inverter DC section. Method of Malfunction Detection A position signal error occurs while the compressor is running. Malfunction A speed error occurs while the compressor is running.
Page 143 Troubleshooting SiENBE04-401A Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.7 ∗ An output over-current may result from wrong internal wiring. If the wires have been disconnected and Refer to P.141 reconnected for part replacement, for example, and the system is interrupted by an output over-current, take the following procedure.
Page 144: Insufficient Gas
SiENBE04-401A Troubleshooting 4.20 Insufficient Gas Remote control Display Gas shortage detection I : A gas shortage is detected by checking the compressor running Method of frequency. Malfunction Gas shortage detection II : A gas shortage is detected by checking the difference between Detection indoor unit heat exchanger temperature and room temperature as well as the difference between outdoor unit heat exchanger temperature and room temperature.
Page 145 Troubleshooting SiENBE04-401A Troubleshooting Check No.4 Refer to P.138 Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 Refer to P.140 Any thermistor Reconnect in position. disconnected? * Discharge pipe thermistor * Indoor / outdoor unit heat exchanger thermistor * Room temperature thermistor * Outdoor air thermistor...
Page 146: Over-Voltage Detection
SiENBE04-401A Troubleshooting 4.21 Over-voltage Detection Remote control Display An abnormal voltage rise is detected by checking the specified over-voltage detection circuit. Method of Malfunction Detection An over-voltage signal is fed from the over-voltage detection circuit to the microcomputer Malfunction (The voltage is over 400V). Decision The system will be shut down if the error occurs 255 times.
Page 147: Check
Check SiENBE04-401A 5. Check How to Check 5.1.1 Electronic Expansion Valve Check Conduct the followings to check the electronic expansion valve (EV). Check No.4 1. Check to see if the EV connector is correctly inserted in the PCB. Compare the EV unit and the connector number.
Page 148: Four Way Valve Performance Check
SiENBE04-401A Check 5.1.2 Four Way Valve Performance Check Check No.5 Turn off the power and turn it on again. ∗ Four way valve coil Cooling / dry : No continuity Start the heating-mode run. Heating : Continuity S80 voltage at DC 180-220 V with Replace the outdoor unit compressor on? PCB.
Page 149: Thermistor Resistance Check
Check SiENBE04-401A 5.1.3 Thermistor Resistance Check Remove the connectors of the thermistors on the PCB, and measure the resistance of each Check No.6 thermistor using tester. The relationship between normal temperature and resistance is shown in the graph and the table below.
Page 150: Installation Condition Check
SiENBE04-401A Check 5.1.4 Installation Condition Check Check No.7 Installation condition check Check the allowable Abnormal Change the position of the air dimensions of the air suction discharge grille or the and discharge installation location. area. Normal Does the discharged air from other outdoor Change the position of the air unit cause an increase of discharge grille or the...
Page 151: Outdoor Unit Fan System Check
Check SiENBE04-401A 5.1.6 Outdoor Unit Fan System Check Check No.9 DC motor — (A)RK(X)S models Check the outdoor unit fan system. Fan motor lead wire Reconnect. Outdoor unit fan running? connector disconnected? Outdoor unit fan system Go to Check No. 15. functioning.
Page 152: Power Supply Waveforms Check
SiENBE04-401A Check 5.1.7 Power Supply Waveforms Check Measure the power supply waveform between pins 1 and 3 on the terminal board, and check Check No.10 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]...
Page 153: Power Transistor Check
Check SiENBE04-401A 5.1.9 Power Transistor Check Check No.13 Check to make sure that the voltage between the terminal of Power transistor (+) and (-) is Note: approx. 0 volt before checking power transistor. < Measuring method > Disconnect the compressor harness connector from the outdoor unit PCB. To disengage the connector, press the protrusion on the connector.
Page 154: Hall Ic Check
SiENBE04-401A Check 5.1.11 Hall IC Check 1. Check the connector connection. Check No.16 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. Failure of (1) faulty PCB Replace the PCB.
Page 155 Check SiENBE04-401A Service Diagnosis...
Page 156: Part 7 Removal Procedure
SiENBE04-401A Part 7 Removal Procedure 1. Indoor Unit...................148 1.1 Removal of Air Filter................148 1.2 Removal of Front Grille ................151 1.3 Removal of Horizontal Blade and Vertical Blade........154 1.4 Removal of Electrical Box, PCB and Swing Motor .......156 1.5 Removal of Heat Exchanger ..............162 1.6 Install of Drain Plug ................165 1.7 Removal of Fan Rotor and Fan Motor..........166 2.
Page 157: Indoor Unit
Indoor Unit SiENBE04-401A 1. Indoor Unit Removal of Air Filter Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. External features Timer lamp (Yellow) If ON/OFF button is kept Home leave ON/OFF button lamp (Red)
Page 158 SiENBE04-401A Indoor Unit Step Procedure Points 3. Opening and shutting front panel Hook a finger onto the Support the front panel by one projection part provided hand, while remove the rotation on the both sides of the axis at the upper center by the unit’s panel and open other hand.
Page 159 Indoor Unit SiENBE04-401A Step Procedure Points When restoring the air filter, make sure that the projection parts on the panel are in the guide groove, and then shut the panel. Removal Procedure...
Page 160: Removal Of Front Grille
SiENBE04-401A Indoor Unit Removal of Front Grille Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Opening and closing of service cover Remove a service cover mounting screw. Open service cover upward A switch for field setting is...
Page 161 Indoor Unit SiENBE04-401A Step Procedure Points 2. Removal of front grille assembly. Remove the two Screw stoppers inside the screws, in the right and flap which were equipped in the left, which fix the the existing models are not main body with the front provided.
Page 162 SiENBE04-401A Indoor Unit Step Procedure Points The front grille can be When restoring the grille, removed in a manner to Make sure whether each pull out the upper part hook is set as it was. forward and lift up the lower part.
Page 163: Removal Of Horizontal Blade And Vertical Blade
Indoor Unit SiENBE04-401A Removal of Horizontal Blade and Vertical Blade Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove horizontal blade. Lift horizontal blade to Screw stoppers inside the open position.
Page 164 SiENBE04-401A Indoor Unit Step Procedure Points For restoring. 1. Since the key pattern hook is provided on the left side, insert the edge of the blade to the tip while rotating it. 2. Restore the two fixed parts of the horizontal blade onto the hook.
Page 165: Removal Of Electrical Box, Pcb And Swing Motor
Indoor Unit SiENBE04-401A Removal of Electrical Box, PCB and Swing Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove front grill. Terminal board Earth screw Heat exchanger thermistor Swing motor...
Page 166 SiENBE04-401A Indoor Unit Step Procedure Points Remove a screw on the The electrical box can be terminal board. removed instead of disengaging the terminal board. Remove a screw on the electrical box. Removal Procedure...
Page 167 Indoor Unit SiENBE04-401A Step Procedure Points Pull up the electrical A hook is provided on the box forward to remove. behind. Removal Procedure...
Page 168 SiENBE04-401A Indoor Unit Step Procedure Points 2. Removal of PCB Remove the shelter. Shelter (R2535) Disengage the front plate of the electrical box. Disengage the knobs Pushing point by pushing the two hooks at the top and the bottom. Push Pushing point (R2536) Sliding to the left, the...
Page 169 Indoor Unit SiENBE04-401A Step Procedure Points PC Board (R2538) Disengage the four knobs on the back of the signal receiver PCB. Knob (R2539) Signal receiver PCB LED1 LED2 LED3 (Green) (Yellow) (Red) INTELLIGENT EYE sensor PCB Thermistor ON/OFF button Removal Procedure...
Page 170 SiENBE04-401A Indoor Unit Step Procedure Points Control PCB. The control PCB is integrated with the power supply PCB. Glass tabu fuse 3.15A 250V (HA terminal) S7(Fan motor) S6(Swing motor) (Address) (Heat exchanger thermistor) (R2541) 3. Remove swing motor assembly. To remove swing motor assembly, remove two screws.
Page 171: Removal Of Heat Exchanger
Indoor Unit SiENBE04-401A Removal of Heat Exchanger Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Conduct pump-down operation. Warning Remove the installation If gas leaks, repair the leak frame from the mounting location, then connect all plate.
Page 172 SiENBE04-401A Indoor Unit Step Procedure Points Disengage the hooks of the pipe retainer on the back. Pipe retainer (R2547) Pull auxiliary pipe Be careful to prevent pipe forward to an angle of deformation. 10 to 20 degrees. Disengage hooks located right and left This hook is located borh side of heat exchanger.
Page 173 Indoor Unit SiENBE04-401A Step Procedure Points Lift and remove heat exchanger. Caution When removing or re- installing heat exchanger, be sure to wear protective gloves or wrap heat exchanger with cloths. (Fins can cut fingers.) Removal Procedure...
Page 174: Install Of Drain Plug
SiENBE04-401A Indoor Unit Install of Drain Plug Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Disconnect drain hose. The drain pan is integrated with the bottom plate. Pull out the drain plug in the left on the drain pan by hand.
Page 175: Removal Of Fan Rotor And Fan Motor
Indoor Unit SiENBE04-401A Removal of Fan Rotor and Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove heat exchanger. To remove right side plate, remove three screws.
Page 176 SiENBE04-401A Indoor Unit Step Procedure Points Disengage hook. Hook (R2558) Loosen the hexagon head set screw on the fan rotor. Removal Procedure...
Page 177 Indoor Unit SiENBE04-401A Step Procedure Points Remove the motor and fan rotor. Remove a screw on the left side plate. Disengage a hook from the backward (R2562) Removal Procedure...
Page 178 SiENBE04-401A Indoor Unit Step Procedure Points Disengage a hook from the backward. Left-side plate (R2564) Since the fan bearing is made of rubber, push it strongly off from the inside. The bearing can be removed just as the left side plate is attached with.
Page 179: Outdoor Unit / Rk(X)S-C, Ark(X)S-C
Outdoor Unit / RK(X)S-C, ARK(X)S-C SiENBE04-401A 2. Outdoor Unit / RK(X)S-C, ARK(X)S-C Removal of Panels and Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1.
Page 180 SiENBE04-401A Outdoor Unit / RK(X)S-C, ARK(X)S-C Step Procedure Points 2. Remove the panels. Top panel Loosen the 3 screws (front, right, left) and lift the top panel. Remove the drip proof Drip proof plate plate. Disconnect the The fan motor is united with connector for fan motor the front panel.
Page 181 Outdoor Unit / RK(X)S-C, ARK(X)S-C SiENBE04-401A Step Procedure Points Undo the hooks. The front panel has 4 hooks. Pull and remove the The fan motor is united with front panel. the front panel. Hooks 3. Remove the fan motor. The screw has reverse winding.
Page 182 SiENBE04-401A Outdoor Unit / RK(X)S-C, ARK(X)S-C Step Procedure Points Loosen the 2 screws Bell mouth and lift the bell mouth to undo the hooks. Remove the bell mouth. Hooks Loosen the fixing hooks Put the lead wire through the and release the lead back of the motor when wire.
Page 183 Outdoor Unit / RK(X)S-C, ARK(X)S-C SiENBE04-401A Step Procedure Points Loosen the 4 screws to M4×16 remove the fan motor. DC fan motor Fan motor Loosen the 2 screws to remove the fan motor fixing frame. Fan motor fixing frame Removal Procedure...
Page 184 SiENBE04-401A Outdoor Unit / RK(X)S-C, ARK(X)S-C Step Procedure Points 4. Remove the right side panel. Loosen the 2 screws on the rear side. Loosen the 3 screws on the right side. Right side panel Loosen the screw and lift the connection port to remove.
Page 185 Outdoor Unit / RK(X)S-C, ARK(X)S-C SiENBE04-401A Step Procedure Points When reassembling, make sure to fit the hook. Hook Removal Procedure...
Page 186: Removal Of Electrical Box
SiENBE04-401A Outdoor Unit / RK(X)S-C, ARK(X)S-C Removal of Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the top panel. Disconnect the connector for fan motor. 1.
Page 187 Outdoor Unit / RK(X)S-C, ARK(X)S-C SiENBE04-401A Step Procedure Points Release the discharge Pay attention so as not to pipe thermistor. lose the clip for thermistor. Thermister Clip Piping Discharge pipe thermistor Release the heat Pay attention so as not to exchanger thermistor.
Page 188: Removal Of Reactor And Partition Plate
SiENBE04-401A Outdoor Unit / RK(X)S-C, ARK(X)S-C Removal of Reactor and Partition Plate Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the outer panels. Reactor Remove the electrical box.
Page 189 Outdoor Unit / RK(X)S-C, ARK(X)S-C SiENBE04-401A Step Procedure Points The partition plate has a hook on the lower side. Lift and pull the partition plate to remove. When reassembling, fit the lower hook into the bottom frame. Hook Removal Procedure...
Page 190: Removal Of Sound Blanket
SiENBE04-401A Outdoor Unit / RK(X)S-C, ARK(X)S-C Removal of Sound Blanket Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the outer panels. Remove the electrical box. 1.
Page 191 Outdoor Unit / RK(X)S-C, ARK(X)S-C SiENBE04-401A Step Procedure Points Pull the sound blanket Since the piping ports on the (inner) out. sound blanket are torn easily, remove the blanket carefully. Pull the sound blanket (bottom) out. Removal Procedure...
Page 192: Removal Of Four Way Valve
SiENBE04-401A Outdoor Unit / RK(X)S-C, ARK(X)S-C Removal of Four Way Valve Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the peripheries. Remove the four way valve and the sheets of putty so as not to burn them.
Page 193 Outdoor Unit / RK(X)S-C, ARK(X)S-C SiENBE04-401A Step Procedure Points Remove the sheets of putty. Cut the pipe with a tube cutter. Tube cutter Heat up the brazed part Provide a protective sheet or and withdraw the piping a steel plate so that the with pliers.
Page 194: Removal Of Compressor
SiENBE04-401A Outdoor Unit / RK(X)S-C, ARK(X)S-C Removal of Compressor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the compressor. Unscrew the nut of the compressor.
Page 195 Outdoor Unit / RK(X)S-C, ARK(X)S-C SiENBE04-401A Step Procedure Points Heat up the brazed part of the suction side and disconnect. Lift the compressor up and remove it. Removal Procedure...
Page 196: Removal Of Pcb
SiENBE04-401A Outdoor Unit / RK(X)S-C, ARK(X)S-C Removal of PCB Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the PCB. You can remove the PCB when you disconnect the Feature of the PCB read wires on the terminal...
Page 197 Outdoor Unit / RK(X)S-C, ARK(X)S-C SiENBE04-401A Step Procedure Points Loosen the 4 screws. Undo the 3 hooks on Hooks the upper side. Lift and pull out the PCB. Removal Procedure...
Page 198 SiENBE04-401A Outdoor Unit / RK(X)S-C, ARK(X)S-C Step Procedure Points Feature of the PCB S70: fan motor Glass fuse PbF (Pb free soldering) S80: four way valve 3,15A S90: thermistor (outdoor air, heat exchanger, discharge pipe) Glass fuse LED A Varistor (R3292) Removal Procedure...
Page 199: Outdoor Unit / Rk(X)H-C, Ark(X)H-C, R(Y)N-C
Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C SiENBE04-401A 3. Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C Removal of External Panels Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points The stop valve cover can be removed when Stop valve...
Page 200 SiENBE04-401A Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C Step Procedure Points The top panel and the front panel are Top panel constructed in a monoblock. Remove the 3 screws on the right side and the 2 screws on the front panel. Front panel Remove the 3 screws on the left side.
Page 201 Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C SiENBE04-401A Step Procedure Points The front panel and the Sectional view at the front. left side panel can be Top panel separated when the fixing screw is removed. The edge of the top panel gets into this groove.
Page 202: Removal Of Bell Mouth
SiENBE04-401A Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C Removal of Bell mouth Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points The bell mouth is attached to the front Hook A plate with 2 screws and 4 hooks.
Page 203: Removal Of Pcb And Electrical Box
Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C SiENBE04-401A Removal of PCB and Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the drip proof The drip proof plate has 5 plate.
Page 204 SiENBE04-401A Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C Step Procedure Points (R4030) Disconnect the fan motor connector. (S70) (R4031) Disconnect the four way valve connector. (S80) (R4032) Removal Procedure...
Page 205 Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C SiENBE04-401A Step Procedure Points Disconnect the electronic expansion valve connector. (S20) (R4033) Disconnect the thermistor connector. (S90) outdoor air heat exchanger discharge pipe (R4034) Disconnect the relay harness. (R4035) Removal Procedure...
Page 206 SiENBE04-401A Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C Step Procedure Points (R4036) Disconnect the 2 reactor harnesses. (R4037) Disconnect the 4 wire harnesses. (R4038) Removal Procedure...
Page 207 Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C SiENBE04-401A Step Procedure Points Remove the 5 screws fixing the PCB. (R4039) Undo the 4 hooks and The PCB has 4 hooks. the PCB can be disengaged. (R4040) Control PCB (outdoor unit) (R4041) Removal Procedure...
Page 208 SiENBE04-401A Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C Step Procedure Points 3. Remove the electrical box. Release the lead wire of the fan motor from the ditch. (R4042) Remove the 2 screws fixing the electrical box. Electrical box (R4043) Remove the screw of the terminal board Terminal board cover cover.
Page 209 Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C SiENBE04-401A Step Procedure Points Remove the terminal board cover. (R4045) Lift and remove the electrical box. (R4046) Removal Procedure...
Page 210: Removal Of Propeller Fan And Fan Motor
SiENBE04-401A Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C Removal of Propeller Fan and Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the external Be sure to restore the drip panels and the drip proof proof plate and to avoid plate protecting the...
Page 211 Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C SiENBE04-401A Step Procedure Points Remove the fan motor assembly. (R4050) The propeller fan can be removed when the Mark washer faced nut (M8) is removed. Propeller When restoring, match the t mark of the propeller fan with (R4051) the D-cut of the motor shaft.
Page 212 SiENBE04-401A Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C Step Procedure Points Remove the 2 screws for removing the fan motor. Fan motor (R4053) Remove the fan motor. (R4054) Removal Procedure...
Page 213: Removal Of Partition Plate And Reactor
Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C SiENBE04-401A Removal of Partition Plate and Reactor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the right side panel.
Page 214 SiENBE04-401A Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C Step Procedure Points Pull the partition plate upward to remove. (R4058) When restoring the partition plate, fit the hook into the bottom frame. (R4059) Removal Procedure...
Page 215 Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C SiENBE04-401A Step Procedure Points 3. Remove the reactor. The reactor can be released by removing the screw. Reactor (R4060) (R4061) Removal Procedure...
Page 216: Removal Of Sound Insulation Pad
SiENBE04-401A Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C Removal of Sound Insulation Pad Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the sound Since the slit prepared for insulation pad.
Page 217 Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C SiENBE04-401A Step Procedure Points Pull out the top sound Since the slit prepared for insulation pad. the piping on the sound insulation pad is torn easily, remove the pad carefully. (R4064) Pull out the under pad of the top sound insulation.
Page 218 SiENBE04-401A Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C Step Procedure Points Pull out the bottom sound insulation pad. (R4067) Removal Procedure...
Page 219: Removal Of Electronic Expansion Valve And Four Way Valve
Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C SiENBE04-401A Removal of Electronic Expansion Valve and Four Way Valve Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the parts around the four way valve.
Page 220 SiENBE04-401A Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C Step Procedure Points Loosen the screw and remove the four way valve coil. Four way valve coil (R4071) (R4072) Removal Procedure...
Page 221 Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C SiENBE04-401A Step Procedure Points Confirm that the refrigerant is completely Caution empty in the refrigerant Be careful about four way circuit before starting valve, pipes and so on, which work. were heated up by a gas Provide a protective brazing machine, so as not to sheet or a steel plate...
Page 222 SiENBE04-401A Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C Step Procedure Points In case that the removal seems to be hard; 1. Remove the piping connection part (brazing part) which is easy to remove and restore. 2. Cut the pipes on the main unit by a miniature copper tube cutter in order to make it easy to remove.
Page 223: Removal Of Compressor
Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C SiENBE04-401A Removal of Compressor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Remove the parts around Be careful so as not to burn the compressor.
Page 224 SiENBE04-401A Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C Step Procedure Points Confirm that the refrigerant is completely empty in the refrigerant Warning circuit before starting Since it may happen that work. refrigeration oil in the Be sure to apply compressor will catch fire, nitrogen’s replacement prepare wet cloth so as to when heating up the...
Page 225 Outdoor Unit / RK(X)H-C, ARK(X)H-C, R(Y)N-C SiENBE04-401A Removal Procedure...
Page 226: Part 8 Others
SiENBE04-401A Part 8 Others 1. Others ....................218 1.1 Test Run from the Remote Control ............218 1.2 Jumper Settings ...................219 Others...
Page 227: Others
Others SiENBE04-401A 1. Others Test Run from the Remote Control In cooling mode, select the lowest programmable temperature; in heating mode, select the For Heat pump highest programmable temperature. Trial operation may be disabled in either mode depending on the room temperature. After trial operation is complete, set the temperature to a normal level.
Page 228: Jumper Settings
SiENBE04-401A Others Jumper Settings 1.2.1 When Two Units are Installed in One Room When two indoor units are installed in one room, the two wireless remote controllers can be set for different addresses. How to set the different addresses Control PCB of the indoor unit (1) Remove the front grille.
Page 229 Others SiENBE04-401A Others...
Page 230: Part 9 Appendix
SiENBE04-401A Part 9 Appendix 1. Piping Diagrams..................222 1.1 Indoor Units ..................222 1.2 Outdoor Units ..................223 2. Wiring Diagrams..................227 2.1 Indoor Units ..................227 2.2 Outdoor Units ..................228 Appendix...
Page 231: Piping Diagrams
Piping Diagrams SiENBE04-401A 1. Piping Diagrams Indoor Units FTKS20/25/35CVMB(9)(8), ATKS20/25/35CVMB(9) FTXS20/25/35CVMB(9)(8), ATXS20/25/35CVMB(9) FTN20/25/35CVMB9, FTKS20/25/35CAVMB FTYN20/25/35CVMB9, FTXS20/25/35CAVMB ATKS20/25/35DAVMB ATXS20/25/35DAVMB INDOOR UNIT INDOOR UNIT HEAT EXCHANGER HEAT EXCHANGER 7.0CuT 7.0CuT 6.4CuT 6.4CuT THERMISTOR THERMISTOR 6.4CuT 6.4CuT ON HEAT EXCH. ON HEAT EXCH. 6.4CuT 6.4CuT CROSS FLOW FAN...
Page 232: Outdoor Units
SiENBE04-401A Piping Diagrams Outdoor Units 1.2.1 Cooling Only RKS20/25CVMB(9), ARKS20/25CVMB, RKS20/25C2VMB OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER 7.0CuT THERMISTOR 7.0CuT HEAT EXCHANGER MOTOR OPERATED THERMISTOR VALVE 7.0CuT 6.4CuT 6.4CuT MUFFLER MUFFLER WITH WITH FILTER FILTER PROPELLER FAN 9.5CuT FOUR WAY VALVE FIELD PIPING NORMALLY : OFF...
Page 233 Piping Diagrams SiENBE04-401A RKH20/25CVMB9, ARKH20/25CVMB9, RN20/25CVMB9, RKH20/25CAVMB, ARKH20/25CAVMB OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER THERMISTOR 9.5CuT 7.9CuT HEAT EXCHANGER THERMISTOR MOTOR OPERATED VALVE 7.9CuT 6.4CuT 6.4CuT 7.9CuT MUFFLER WITH FILTER PROPELLER FAN MUFFLER WITH FILTER 9.5CuT FIELD PIPING ( 6.4CuT ) LIQUID STOP VALVE MUFFLER...
Page 234 SiENBE04-401A Piping Diagrams 1.2.2 Heat Pump RXS20/25CVMB(9), ARXS20/25CVMB, RXS20/25C2VMB OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER 7.0CuT THERMISTOR 7.0CuT HEAT EXCHANGER MOTOR OPERATED THERMISTOR VALVE 7.0CuT 6.4CuT 6.4CuT MUFFLER MUFFLER WITH WITH FILTER FILTER PROPELLER FAN 9.5CuT FOUR WAY FIELD PIPING VALVE ON : HEATING ( 6.4CuT )
Page 235 Piping Diagrams SiENBE04-401A RXH20/25CVMB9, ARXH20/25CVMB9, RYN20/25CVMB9, RXH20/25CAVMB, ARXH20/25CAVMB OUTDOOR UNIT OUTDOOR TEMPERATURE HEAT EXCHANGER THERMISTOR 9.5CuT 7.9CuT HEAT EXCHANGER MOTOR OPERATED THERMISTOR VALVE 7.9CuT 6.4CuT 6.4CuT 7.9CuT MUFFLER WITH FILTER PROPELLER FAN LIQUID RECEIVER WITH FILTER 9.5CuT FOUR WAY FIELD PIPING VALVE ( 6.4CuT ) ON:HEATING...
Page 236: Wiring Diagrams
SiENBE04-401A Wiring Diagrams 2. Wiring Diagrams Indoor Units FTK(X)S20/25/35CVMB(9)(8), ATK(X)S20/25/35CVMB(9), FTK(X)S20/25/35CAVMB ATK(X)S20/25/35DAVMB PCB3 S36 S35 PCB1 → INTELLIGENT- EYE SENSOR 3.15A outdoor TERMINAL FOR PCB2 CENTRALIZED CONTROL FIELD WIRING. TRANSMISSION LED1 LED2 LED3 CIRCUIT CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF SIGNAL THE MAIN POWER SUPPLY IS t°...
Page 237: Outdoor Units
Wiring Diagrams SiENBE04-401A Outdoor Units RK(X)S20/25/35CVMB(9), ARK(X)S20/25/35CVMB, RK(X)S20/25/35C2VMB C100 FIELD WIRING. indoor PCB1 MRM20 IPM1 MRM10 3.15A IC11 3.15A PCB2 MRCW outdoor NOTE 1. REFER TO THE NAMEPLATE FOR THE POWER REQUIREMENTS. t ° t ° t ° IN CASE OF C74 , C75 IN CASE OF COOLING ONLY...
Page 238 SiENBE04-401A Wiring Diagrams RXH20/25/35CVMB9, ARXH20/25/35CVMB9, RYN20/25/35CVMB9, RXH20/25/35CAVMB, ARXH20/25/35CAVMB indoor MRM20 IPM1 MRM10 3.15A C100 IC11 FIELD WIRING. MRCW NOTE 1.REFER TO THE NAMEPLATE FOR THE POWER REQUIREMENTS. t° t° t° X30A outdoor : TERMINAL STRIP ( OUTDOOR ) ( DISCHARGE ) C74 , C75 , C80 ( CONDENSER ) C94 , C95 , C100 : CAPACITOR...
Page 239 Wiring Diagrams SiENBE04-401A Appendix...
Page 240: Index
SiENBE04-401A Index Numerics cover service cover ..........151 00 .................109 stop valve cover ........170, 190 3-minutes standby ..........55, 62 terminal board cover ........199 terminal cover ....... 183, 210, 214 a1 .................110 a5 .................111 dc fan lock ............118 a6 .................113 dc voltage / current sensor abnormality ....
Page 241 SiENBE04-401A p4 ..............127 horizontal blade ........... 154 u0 ..............135 hot start function ............ 55 u2 ..............137 u4 ..............115 error codes and description ........109 indoor heat exchanger thermistor ....56, 57 indoor unit pcb abnormality ......... 110 input current control ..........63 f3 ................122 input over current detection .........
Page 242 SiENBE04-401A outdoor heat exchanger thermistor ..56, 57, 128, 178 s27 ................ 38 outdoor unit fan system check ......142 s30 ................ 40 output over current detection .......133 s32 ................ 38 over current ..........69, 119, 133 s35 ................ 38 overload ............69, 116 s36 ................
Page 243 SiENBE04-401A varistor ............38, 40, 42 vertical blade ............155 voltage detection function ........70 wide-angle louvres ..........46 wiring diagrams ............227 Index...
Page 244 SiENBE04-401A Drawings & Flow Charts intelligent eye sensor pcb ........39 inverter features ............ 45 arc433a ..............106 inverter powerful operation ........54 automatic air flow control ........47 inverter units refrigerant system check ....143 automatic operation ..........49 auto-swing ..............46 jumper settings ............ 219 compressor lock ...........117 compressor protection function ......62 mode hierarchy .............
Page 245 SiENBE04-401A rn35cvmb9 .............224 rxh20/25cavmb ..........226 rxh20/25cvmb9 ..........226 rxh35cavmb ...........226 rxh35cvmb9 ...........226 rxs20/25c2vmb ..........225 rxs20/25cvmb(9) ..........225 rxs35c2vmb ...........225 rxs35cvmb(9) ..........225 ryn20/25cvmb9 ..........226 ryn35cvmb9 ...........226 position sensor abnormality .........125 power supply waveforms check ......143 powerful operation ..........54 programme dry function .........48 radiation fin temperature rise .......131 remote controller ..........106 service check function ..........106 signal receiver pcb ..........39...
Page 246 "The present publication is drawn up by way of information only Daikin Europe N.V. is approved by LRQA for its Quality Daikin’s unique position as a and does not constitute an offer binding upon Daikin Europe N.V.. Management System in accordance with the ISO9001 manufacturer of air conditioning Daikin Europe N.V.

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Daikin FTKS20CVMB Service Manual

Part 1 List of Functions

Part 2 Specifications

Part 3 Printed Circuit Board Connector Wiring Diagram

Part 4 Function and Control

Part 5 System Configuration

Part 6 Service Diagnosis

Part 7 Removal Procedure

Part 8 Others

Part 9 Appendix

Index

Quick Links

Troubleshooting

Need help?

Questions and answers

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Summary of Contents for Daikin FTKS20CVMB

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Table of Contents