Page 1 SiENBE12-620 Service Manual E-Series [Applied Models] Inverter Multi : Cooling Only Inverter Multi : Heat Pump...
Page 2 SiENBE12-620 SUPER MULTI NX E-Series Cooling Only Indoor Unit FTKS20D3VMW(L) FDKS25EAVMB FVKS25BAVMB FHQ35BVV1B FTKS25D3VMW(L) FDKS35EAVMB FVKS35BAVMB FHQ50BVV1B FTKS35D3VMW(L) FDKS25CAVMB FVKS50BAVMB FTKS50D2V1W(L) FDKS35CAVMB FLKS25BAVMB FTKS20CAVMB FDKS50CVMB FLKS35BAVMB FTKS25CAVMB FLKS50BAVMB FTKS35CAVMB FTKS50EV1B Outdoor Unit 3MKS50E2(3)V1B 4MKS58E2(3)V1B Heat Pump Indoor Unit FTXG25EV1BW(S) FDXS25EAVMB...
Page 3: Table Of Contents
SiENBE12-620 1. Introduction .....................v 1.1 Safety Cautions ..................v Part 1 List of Functions ..............1 1. List of Functions ..................2 1.1 Cooling Only Models ................2 1.2 Heat Pump Models...................7 Part 2 Specifications ..............15 1. Specifications ..................16 1.1 Indoor Units - Cooling Only ..............16 1.2 Outdoor Units - Cooling Only ..............24 1.3 Indoor Units - Heat Pump...............25 1.4 Outdoor Units - Heat Pump ..............38...
Page 4 SiENBE12-620 3.7 Heating Peak-cut Control ...............93 3.8 Fan Control.....................94 3.9 Liquid Compression Protection Function 2..........94 3.10 Defrost Control ..................95 3.11 Electronic Expansion Valve Control ............96 3.12 Malfunctions ..................100 3.13 Forced Operation Mode ...............101 3.14 Wiring-Error Check................102 3.15 Additional Function................104 Part 5 System Configuration............. 107 1.
Page 5 SiENBE12-620 5.26 Low-voltage Detection or Over-voltage Detection........249 5.27 Signal Transmission Error (on Outdoor Unit PCB).......250 5.28 Anti-icing Function in Other Rooms / Unspecified Voltage (between Indoor and Outdoor Units) ............251 6. Check ....................252 6.1 How to Check ..................252 Part 7 Removal Procedure ............263 1.
Page 6: Introduction
SiENBE12-620 Introduction 1. Introduction Safety Cautions Cautions and Be sure to read the following safety cautions before conducting repair work. Warnings Warning” and “ Caution”. The “ Warning” The caution items are classified into “ items are especially important since they can lead to death or serious injury if they are not Caution”...
Page 7: Cautions Regarding Products After Repair
Introduction SiENBE12-620 Caution 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
SiENBE12-620 Introduction Warning Be sure to use an exclusive power circuit for the equipment, and follow the technical standards related to the electrical equipment, the internal wiring regulations and the instruction manual for installation when conducting electrical work. Insufficient power circuit capacity and improper electrical work can cause an electrical shock or fire.
Page 9: Using Icons
Introduction SiENBE12-620 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
SiENBE12-620 Part 1 List of Functions 1. List of Functions ..................2 1.1 Cooling Only Models ................2 1.2 Heat Pump Models...................7 List of Functions...
Page 11: List Of Functions
List of Functions SiENBE12-620 1. List of Functions Cooling Only Models Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter with Bacteriostatic, — — Virustatic Functions Operation Limit for Cooling (°CDB) — — Basic Operation Limit for Heating (°CWB) —...
Page 12 SiENBE12-620 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 Operation Limit for Heating (°CWB) — — Photocatalytic Deodorizing Filter —...
Page 13 List of Functions SiENBE12-620 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 Air Purifying Filter with Photocatalytic Function Operation Limit for Heating (°CWB) —...
Page 14 SiENBE12-620 List of Functions 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 Air Purifying Filter with Photocatalytic Function Operation Limit for Heating (°CWB) —...
Page 15 List of Functions SiENBE12-620 Category Functions Category Functions Air Purifying Filter with Bacteriostatic & Inverter (with Inverter Power Control) — Virustatic Functions –10 Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — Basic Function Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
Page 16: Heat Pump Models
SiENBE12-620 List of Functions Heat Pump Models Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter with Bacteriostatic, — — — Virustatic Functions Operation Limit for Cooling (°CDB) — — — Basic Operation Limit for Heating (°CWB) —...
Page 17 List of Functions SiENBE12-620 Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter with Bacteriostatic, — — — Virustatic Functions Operation Limit for Cooling (°CDB) — — — Basic Operation Limit for Heating (°CWB) — — — Photocatalytic Deodorizing Filter —...
Page 18 SiENBE12-620 List of Functions 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 Air Purifying Filter with Photocatalytic Function Operation Limit for Heating (°CWB) —...
Page 19 List of Functions SiENBE12-620 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 Air Purifying Filter with Photocatalytic Function Operation Limit for Heating (°CWB) —...
Page 20 SiENBE12-620 List of Functions Category Functions Category Functions Air Purifying Filter with Bacteriostatic & Inverter (with Inverter Power Control) — Virustatic Functions –10 Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — Basic Function –15 Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
Page 21 List of Functions SiENBE12-620 Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter with Bacteriostatic, — — — Virustatic Functions Operation Limit for Cooling (°CDB) — — — Basic Operation Limit for Heating (°CWB) — — — Photocatalytic Deodorizing Filter —...
Page 22 SiENBE12-620 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 Operation Limit for Heating (°CWB) — — Photocatalytic Deodorizing Filter —...
Page 23 List of Functions SiENBE12-620 Category Functions Category Functions Air Purifying Filter with Bacteriostatic & Inverter (with Inverter Power Control) — Virustatic Functions –10 Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — Basic Function –15 Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
Page 24: Part 2 Specifications
SiENBE12-620 Part 2 Specifications 1. Specifications ..................16 1.1 Indoor Units - Cooling Only ..............16 1.2 Outdoor Units - Cooling Only ..............24 1.3 Indoor Units - Heat Pump...............25 1.4 Outdoor Units - Heat Pump ..............38 Specifications...
Page 25: Specifications
Specifications SiENBE12-620 1. Specifications Indoor Units - Cooling Only Wall Mounted Type 50Hz 230V Model FTKS20D3VMW FTKS20D3VML Rated Capacity 2.0kW Class 2.0kW Class Front Panel Color White Silver Line 8.7 (307) 8.7 (307) 6.7 (237) 6.7 (237) mł/min Air Flow Rates (cfm) 4.7 (166) 4.7 (166)
Page 26 SiENBE12-620 Specifications 50Hz 230V Model FTKS35D3VMW FTKS35D3VML Rated Capacity 3.5kW Class 3.5kW Class Front Panel Color White Silver Line 8.9 (314) 8.9 (314) 6.9 (244) 6.9 (244) mł/min Air Flow Rates (cfm) 4.8 (169) 4.8 (169) 4.0 (141) 4.0 (141) Type Cross Flow Fan Cross Flow Fan...
Page 27 Specifications SiENBE12-620 50Hz 230V Model FTKS20CAVMB FTKS25CAVMB Rated Capacity 2.0kW Class 2.5kW Class Front Panel Color White White 7.7 (272) 7.7 (272) 5.9 (208) 5.9 (208) mł/min Air Flow Rates (cfm) 4.2 (148) 4.2 (148) 3.6 (127) 3.6 (127) Type Cross Flow Fan Cross Flow Fan Motor Output...
Page 28 SiENBE12-620 Specifications Duct Connected Type 50Hz 230V Model FDKS25CAVMB FDKS35CAVMB Rated Capacity 2.5kW Class 3.5kW Class — — Front Panel Color 9.5 (335) 10.0 (353) 8.8 (311) 9.3 (328) mł/min Air Flow Rates (cfm) 8.0 (282) 8.5 (300) 6.7 (237) 7.0 (247) Type Sirocco Fan...
Page 29 Specifications SiENBE12-620 50Hz 230V Model FDKS25EAVMB FDKS35EAVMB Rated Capacity 2.5kW Class 3.5kW Class — — Front Panel Color 8.7 (307) 8.7 (307) 8.0 (282) 8.0 (282) mł/min Air Flow Rates (cfm) 7.3 (258) 7.3 (258) 6.2 (219) 6.2 (219) Type Sirocco Fan Sirocco Fan Motor Output...
Page 30 SiENBE12-620 Specifications Floor / Ceiling Suspended Dual Type 50Hz 230V Model FLKS25BAVMB FLKS35BAVMB Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color Almond White Almond White 7.6 (268) 8.6 (304) 6.8 (240) 7.6 (268) mł/min Air Flow Rates (cfm) 6.0 (212) 6.6 (233) 5.2 (184) 5.6 (198)
Page 31 Specifications SiENBE12-620 Floor Standing Type 50Hz 230V Model FVKS25BAVMB FVKS35BAVMB Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color Almond White Almond White 8.1 (286) 8.3 (293) 6.2 (219) 6.3 (222) mł/min Air Flow Rates (cfm) 4.3 (152) 4.3 (152) 3.4 (120) 3.4 (120) Type...
Page 32 SiENBE12-620 Specifications Ceiling Suspended Type 50Hz 230V Model FHQ35BVV1B FHQ50BVV1B Rated Capacity 3.5kW Class 5.0kW Class Color White White Decoration Panel Dimensions (H×W×D) — — 13.0 (458) 13.0 (458) — — mł/min Air Flow Rates (cfm) 10.0 (353) 10.0 (353) —...
Page 33: Outdoor Units - Cooling Only
Specifications SiENBE12-620 Outdoor Units - Cooling Only 50Hz 230V Model 3MKS50E2(3)V1B 4MKS58E2(3)V1B — — Cooling Capacity — — Power Consumption — — Running Current Casing Color Ivory White Ivory White Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC36BXD 2YC36BXD...
Page 34: Indoor Units - Heat Pump
SiENBE12-620 Specifications Indoor Units - Heat Pump Wall Mounted Type 50Hz 230V FTXG25EV1BW FTXG25EV1BS Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 2.5kW Class Front Panel Color Mat Crystal White Mat Crystal Silver 7.7 (271) 9.0 (317) 7.7 (271) 9.0 (317) 6.1 (215) 7.9 (278)
Page 35 Specifications SiENBE12-620 50Hz 230V CTXG50EV1BW CTXG50EV1BS Model Cooling Heating Cooling Heating Rated Capacity 5.0kW Class 5.0kW Class Front Panel Color Mat Crystal White Mat Crystal Silver 11.3 (398) 12.6 (444) 11.3 (398) 12.6 (444) 9.1 (320) 10.6 (373) 9.1 (320) 10.6 (373) mł/min Air Flow Rates...
Page 36 SiENBE12-620 Specifications FTXS50D2V1W FTXS50D2V1L Model Cooling Heating Cooling Heating Rated Capacity 5.0kW Class 5.0kW Class Front Panel Color White White 11.4 (402) 11.4 (402) 11.4 (402) 11.4 (402) 9.3 (328) 9.4 (332) 9.3 (328) 9.4 (332) mł/min Air Flow Rates (cfm) 7.1 (251) 7.4 (261)
Page 37 Specifications SiENBE12-620 50Hz 230V FTXS35D3VMW FTXS35D3VML Model Cooling Heating Cooling Heating Rated Capacity 3.5kW Class 3.5kW Class Front Panel Color White Silver Line 8.9 (314) 9.7 (342) 8.9 (314) 9.7 (342) 6.9 (244) 7.9 (279) 6.9 (244) 7.9 (279) mł/min Air Flow Rates (cfm) 4.8 (169)
Page 38 SiENBE12-620 Specifications 50Hz 230V FTXS35CAVMB FTXS50EV1B Model Cooling Heating Cooling Heating Rated Capacity 3.5kW Class 5.0kW Class Front Panel Color White White 7.7 (272) 8.1 (286) 14.7 (519) 16.1 (569) 6.0 (212) 6.7 (237) 12.4 (438) 13.9 (491) mł/min Air Flow Rates (cfm) 4.4 (155) 5.3 (187)
Page 39 Specifications SiENBE12-620 50Hz 230V ATXG25EV1B ATXG35EV1B Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color Mat Crystal White Mat Crystal White 7.7 (271) 9.0 (317) 8.1 (285) 9.6 (338) 6.1 (215) 7.9 (278) 6.5 (229) 8.2 (289) mł/min Air Flow Rates...
Page 40 SiENBE12-620 Specifications 50Hz 230V ATXS25E2V1B ATXS35E2V1B Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color White White 8.7 (307) 9.4 (332) 8.9 (314) 9.7 (342) 6.7 (237) 7.6 (268) 6.9 (244) 7.9 (279) mł/min Air Flow Rates (cfm) 4.7 (166) 5.8 (205)
Page 41 Specifications SiENBE12-620 50Hz 230V ATXS25DAVMB ATXS35DAVMB Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color White White 7.7 (272) 7.8 (275) 7.7 (272) 8.1 (286) 5.9 (208) 6.5 (230) 6.0 (212) 6.7 (237) mł/min Air Flow Rates (cfm) 4.2 (148) 5.3 (187)
Page 42 SiENBE12-620 Specifications Duct Connected Type 50Hz 230V FDXS25CAVMB FDXS35CAVMB Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class — — Front Panel Color 9.5 (335) 9.5 (335) 10.0 (353) 10.0 (353) 8.8 (311) 8.8 (311) 9.3 (328) 9.3 (328) mł/min Air Flow Rates (cfm)
Page 43 Specifications SiENBE12-620 50Hz 230V FDXS25EAVMB FDXS35EAVMB Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class — — Front Panel Color 8.7 (307) 8.7 (307) 8.7 (307) 8.7 (307) 8.0 (282) 8.0 (282) 8.0 (282) 8.0 (282) mł/min Air Flow Rates (cfm) 7.3 (258) 7.3 (258)
Page 44 SiENBE12-620 Specifications Floor / Ceiling Suspended Dual Type 50Hz 230V FLXS25BAVMB FLXS35BAVMB Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color Almond White Almond White 7.6 (268) 9.2 (325) 8.6 (304) 9.8 (346) 6.8 (240) 8.3 (293) 7.6 (268) 8.9 (314)
Page 45 Specifications SiENBE12-620 Floor Standing Type 50Hz 230V FVXS25BAVMB FVXS35BAVMB Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color Almond White Almond White Air Flow Rates 8.1 (286) 9.2 (325) 8.3 (293) 9.2 (325) 6.2 (219) 7.0 (247) 6.3 (222) 7.1 (251)
Page 46 SiENBE12-620 Specifications Ceiling Suspended Type 50Hz 230V FHQ35BVV1B FHQ50BVV1B Model Cooling Heating Cooling Heating Rated Capacity 3.5kW Class 5.0kW Class Color White White Decoration Panel Dimensions (H×W×D) — — 13.0 (458) 13.0 (458) 13.0 (458) 13.0 (458) — — mł/min Air Flow Rates (cfm) 10.0 (353)
Page 47: Outdoor Units - Heat Pump
Specifications SiENBE12-620 Outdoor Units - Heat Pump 50Hz 230V 2MXS52E2(3)V1B 3MXS52E2(3)V1B Model Cooling Heating Cooling Heating — — Cooling Capacity — — Power Consumption — — Running Current Casing Color Ivory White Ivory White Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC36BXD...
Page 48 SiENBE12-620 Specifications 50Hz 230V 2AMX52E2(3)V1B 3AMX52E2(3)V1B Model Cooling Heating Cooling Heating — — Cooling Capacity — — Power Consumption — — Running Current Casing Color Ivory White Ivory White Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC36BXD 2YC36BXD Motor Output...
Page 49 Specifications SiENBE12-620 Specifications...
Page 50: Part 3 Printed Circuit Board Connector Wiring Diagram
SiENBE12-620 Part 3 Printed Circuit Board Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram........42 1.1 Wall Mounted Type ................42 1.2 Duct Connected Type................51 1.3 Floor / Ceiling Suspended Dual Type.............53 1.4 Floor Standing Type ................56 1.5 Ceiling Suspended Type ................59 1.6 Outdoor Units ..................61 Printed Circuit Board Connector Wiring Diagram...
Page 51: Printed Circuit Board Connector Wiring Diagram
Printed Circuit Board Connector Wiring Diagram SiENBE12-620 1. Printed Circuit Board Connector Wiring Diagram Wall Mounted Type 1.1.1 FTXG25~35E, CTXG50E, ATXG25~50E Connectors PCB(1) (Control PCB) 1) S1 Connector for fan motor 2) S21 Connector for centralized control (HA) 3) S32 Connector for heat exchanger thermistor 4) S36 Connector for INTELLIGENT EYE sensor PCB and control...
Page 52 SiENBE12-620 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Control PCB (indoor unit) +14V JA JC LED A (R6038) PCB(2): Signal Receiver PCB RTH1 LED4 LED2 LED3 (R4992) PCB(3): INTELLIGENT EYE sensor PCB (R4988) Printed Circuit Board Connector Wiring Diagram...
Page 53 Printed Circuit Board Connector Wiring Diagram SiENBE12-620 1.1.2 FTK(X)S20~50D, ATXS20~50E Connectors PCB(1)(Control PCB) 1) S1 Connector for AC fan motor 2) S6 Connector for swing motor (horizontal blades) 3) S7 Connector for AC fan motor (Hall IC) 4) S21 Connector for centralized control (HA) 5) S26 Connector for display PCB 6) S28...
Page 54 SiENBE12-620 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Control PCB +12V LED A (R6039) PCB(2): Signal Receiver PCB PCB(3): Display PCB LED1 LED2 LED3 RTH1 (R5234) (R4290) PCB(4): INTELLIGENT EYE sensor PCB (R4291) Printed Circuit Board Connector Wiring Diagram...
Page 55 Printed Circuit Board Connector Wiring Diagram SiENBE12-620 1.1.3 FTK(X)S20~35C, ATXS20~35D Connectors PCB(1) (Control PCB) 1) S1 Connector for AC fan motor 2) S6 Connector for swing motor (Horizontal Flap) 3) S7 Connector for AC fan motor 4) S21 Connector for centralized control to 5 rooms 5) S26 Connector for signal receiver PCB 6) S32...
Page 56 SiENBE12-620 Printed Circuit Board Connector Wiring Diagram PCB(1) Control PCB (2) Signal reciever 5V Check 12V Check PCB (3) Intelligent eye sensor (R2413) Printed Circuit Board Connector Wiring Diagram...
Page 57 Printed Circuit Board Connector Wiring Diagram SiENBE12-620 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 58 SiENBE12-620 Printed Circuit Board Connector Wiring Diagram 1.1.4 FTK(X)S50E, ATX50E Connectors PCB(1) (Control PCB) 1) S1 Connector for DC fan motor 2) S6 Connector for swing motor (horizontal blades) 3) S8 Connector for swing motor (vertical blades) 4) S21 Connector for centralized control (HA) 5) S26 Connector for buzzer PCB 6) S28...
Page 59 Printed Circuit Board Connector Wiring Diagram SiENBE12-620 PCB Detail PCB(1): Control PCB (indoor unit) +12V LED A (R6040) PCB(2): Signal Receiver PCB PCB(3): Buzzer PCB (R2861) RTH1 (R2862) PCB(4): Display PCB PCB(5): Intelligent Eye sensor PCB LED1 LED2 LED3 (R2863) (R2864) Printed Circuit Board Connector Wiring Diagram...
Page 60: Duct Connected Type
SiENBE12-620 Printed Circuit Board Connector Wiring Diagram Duct Connected Type Connectors PCB(1) (Control PCB) 1) S1 Connector for AC fan motor 2) S7 Connector for AC fan motor 3) S21 Connector for centralized control to 5 rooms 4) S26 Connector for display PCB 5) S32 Connector for heat exchanger thermistor PCB(2) (Display PCB)
Page 61 Printed Circuit Board Connector Wiring Diagram SiENBE12-620 PCB Detail PCB (2): Display PCB LED3 LED2 RTH1 LED1 2P084375 Printed Circuit Board Connector Wiring Diagram...
Page 62: Floor / Ceiling Suspended Dual Type
SiENBE12-620 Printed Circuit Board Connector Wiring Diagram Floor / Ceiling Suspended Dual Type Connectors PCB(1) (Control PCB) 1) S6 Connector for swing motor (horizontal swing) 2) S7 Connector for AC fan motor 3) S21 Connector for centralized control 4) S24 Connector for display PCB 5) S26 Connector for signal receiver PCB...
Page 63 Printed Circuit Board Connector Wiring Diagram SiENBE12-620 PCB Detail PCB (1): Control PCB Pb Free LED A 12V Check 5V Check 2P084352 PCB Detail PCB (2): Power Supply PCB Pb Free Printed Circuit Board Connector Wiring Diagram...
Page 64 SiENBE12-620 Printed Circuit Board Connector Wiring Diagram PCB (3): Display PCB Pb Free LED2 LED1 LED3 2P084377 PCB (4): Signal Receiver PCB EX511 REV 12 PHOTO 2P084377-1 S31(RTH) (R4977) Printed Circuit Board Connector Wiring Diagram...
Page 65: Floor Standing Type
Printed Circuit Board Connector Wiring Diagram SiENBE12-620 Floor Standing Type Connectors PCB(1) (Power Supply PCB) 1) S8, S202, Connector for control PCB S204 PCB(2) (Control PCB) 1) S6 Connector for swing motor and lower air outlet motor 2) S21 Connector for centralized control 3) S23 Connector for display PCB 4) S31, S32...
Page 66 SiENBE12-620 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB (1): Power Supply PCB (25, 35 class) S202 S204 2P171355 PCB Detail PCB (1): Power Supply PCB (50 class) PCB1 S202 S204 2P044051F Printed Circuit Board Connector Wiring Diagram...
Page 67 Printed Circuit Board Connector Wiring Diagram SiENBE12-620 PCB Detail PCB (2): Control PCB PCB (3): Display PCB PCB (4): Signal Receiver PCB Pb Free S302 S301 Pb Free PCB 3 LED 14 PCB 4 PCB 2 S201 LED 12 Pb Free LED 11 LED A S203...
Page 68: Ceiling Suspended Type
SiENBE12-620 Printed Circuit Board Connector Wiring Diagram Ceiling Suspended Type Connectors 1) X5A Connector for Terminal Strip (for Wired Remote Control) 2) X14A Connector for Limit Switch (for Swing Flap) 3) X15A Connector for Drain Pump (Optional Accessory) 4) X17A Connector for Heat Exchanger Thermistor (2) 5) X18A Connector for Heat Exchanger Thermistor (1)
Page 69 Printed Circuit Board Connector Wiring Diagram SiENBE12-620 PCB Detail Capacity setting X19A X18A adaptor X40A X15A X14A X17A X61A X35A X60A X33A (Service monitor LED) X24A X26A X29A X27A X20A X25A 2P095007 Printed Circuit Board Connector Wiring Diagram...
Page 70: Outdoor Units
SiENBE12-620 Printed Circuit Board Connector Wiring Diagram Outdoor Units Connectors PCB(1)(Main PCB) 1) S10 Connector for terminal strip (indoor-outdoor transmission) 2) S15 Connector for COOL / HEAT mode lock 3) S20 Connector for electronic expansion valve coil A port (white) 4) S21 Connector for electronic expansion valve coil B port (red) 5) S22...
Page 71 Printed Circuit Board Connector Wiring Diagram SiENBE12-620 PCB Detail PCB(1): Main PCB (outdoor unit 50/60 models) FU2(3.15A) (30A) S101 FU3(3.15A) (R6041) Printed Circuit Board Connector Wiring Diagram...
Page 72 SiENBE12-620 Printed Circuit Board Connector Wiring Diagram PCB(2): Service Monitor PCB LED3 LED4 LED1 LEDA LED2 S102 3P165332 Printed Circuit Board Connector Wiring Diagram...
Page 73 Printed Circuit Board Connector Wiring Diagram SiENBE12-620 Printed Circuit Board Connector Wiring Diagram...
Page 74: Part 4 Function And Control
SiENBE12-620 Part 4 Function and Control 1. Main Functions..................66 1.1 Frequency Principle................66 1.2 Power-Airflow Dual Flaps, Wide Angle Louvers and Auto-Swing ..68 1.3 Operation Starting Control..............69 1.4 Fan Speed Control for Indoor Units............70 1.5 Programme Dry Function ...............71 1.6 Automatic Operation................72 1.7 Thermostat Control.................73 1.8 Night Set Mode..................74 1.9 ECONO Mode ..................75...
Page 75: Main Functions
Main Functions SiENBE12-620 1. Main Functions Note: See the list of functions for the functions applicable to different models. Frequency Principle Main Control The compressor is frequency-controlled during normal operation. The target frequency is set by Parameters the following 2 parameters coming from the operating indoor unit: The load condition of the operating indoor unit The difference between the room temperature and the set temperature Additional...
Page 76 SiBE12-620 Main Functions Inverter Features The inverter provides the following 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 77: Power-Airflow Dual Flaps, Wide Angle Louvers And Auto-Swing
Main Functions SiENBE12-620 Power-Airflow Dual Flaps, Wide Angle Louvers and Auto-Swing Power-airflow The large flaps send a large volume of air downwards to the floor. The flap provides an optimum Dual Flaps control area in cooling, heating and dry mode. Heating Mode During heating mode, the large flap enables direct warm air straight downwards.
Page 78: Operation Starting Control
SiBE12-620 Main Functions Operation Starting Control FTXG25·35E, CTXG50E, ATXG25·50E The system carries out the following control at the beginning to conduct every functional parts properly. 1. Opening the front panel fully 2. Output of the ΔD signal after the front panel starts moving 3.
Page 79: Fan Speed Control For Indoor Units
Main Functions SiENBE12-620 Fan Speed Control for Indoor Units Control Mode The airflow rate can be automatically controlled depending on the difference between the set temperature and the room temperature. This is done through phase control and Hall IC control. For more information about Hall IC, refer to the troubleshooting for fan motor on page 216.
Page 80: Programme Dry Function
SiBE12-620 Main Functions 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. In Case of The microcomputer automatically sets the temperature and fan settings.
Page 81: Automatic Operation
Main Functions SiENBE12-620 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 82: Thermostat Control
SiBE12-620 Main Functions Thermostat Control Thermostat control is based on the difference between the room temperature and the setpoint. Thermostat OFF Condition The temperature difference is in the zone A. Thermostat ON Condition The temperature difference is above the zone C after being in the zone A. The system resumes from defrost control in any zones except A.
Page 83: Night Set Mode
Main Functions SiENBE12-620 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 The Night Set circuit continues heating or cooling the room at the set temperature for the first Circuit one hour, then automatically raises the temperature setting slightly in the case of cooling, or lowers it slightly in the case of heating, for economical operations.
Page 84: Econo Mode
SiBE12-620 Main Functions ECONO Mode Outline FTK(X)S20-50D, ATXS20-50E The "ECONO mode" reduces the maximum operating current and power consumption by approx. 30% during start up etc.. This mode is particularly convenient for energy-saving-oriented users. It is also a major bonus for those whose breaker capacities do not allow the use of multiple electrical devices and air conditioners.
Page 85: Intelligent Eye (Wall Mounted Type Only)
Main Functions SiENBE12-620 1.10 INTELLIGENT EYE (Wall Mounted Type Only) 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.
Page 86 SiBE12-620 Main Functions 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 87: Home Leave Operation
Main Functions SiENBE12-620 1.11 HOME LEAVE Operation Outline In order to respond to the customer's need for immediate heating and cooling of the room after 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 88: Inverter Powerful Operation
SiBE12-620 Main Functions 1.12 Inverter POWERFUL Operation Outline In order to exploit the cooling and heating capacity to full extent, operate the air conditioner by increasing the indoor fan rotating speed and the compressor frequency. Details of the When POWERFUL button is pushed in each operation mode, the fan speed / setting Control temperature will be converted to the following states in a period of twenty minutes.
Page 89: Other Functions
Main Functions SiENBE12-620 1.13 Other Functions 1.13.1 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 90 SiBE12-620 Main Functions 1.13.5 Photocatalytic Deodorizing Filter Photocatalytic Deodorizing Filter demonstrates powerful oxidation characteristics when subjected to harmless ultraviolet light. Photocatalytic deodorizing power is recovered simply by exposing the filter to the sun for 6 hours once every 6 months. 1.13.6 Air-Purifying Filter A double structure made up of a bacteriostatic filter and an Air-Purifying Filter traps dust, mildew, mites, tobacco smoke, and allergy-causing pollen.
Page 91: Function Of Main Structural Parts
Function of Main Structural Parts SiENBE12-620 2. Function of Main Structural Parts Main Structural Parts Heat Pump Model Expansion valve Four way valve (R5066) Compressor Cooling Only Model Expansion valve Compressor (R4596) Note: Expansion Valve : In Case of 2 port model..EVA-B, 3 port model..EVA-C, 4 port model..EVA-D Function and Control...
Page 92: Function Of Thermistor
SiBE12-620 Function of Main Structural Parts Function of Thermistor 2.2.1 Heat Pump Model A Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling target discharge temperature. Exchanger The system sets a target discharge temperature according to the outdoor and indoor heat Thermistor exchanger temperature, and controls the electronic expansion valve opening so that the target discharge temperature can be obtained.
Page 93 Function of Main Structural Parts SiENBE12-620 D Indoor Heat 1. The indoor heat exchanger thermistors are used for controlling target discharge Exchanger temperature. Thermistor The system sets a target discharge pipe temperature according to the outdoor and indoor heat exchanger temperature, and controls the electronic expansion valve opening so that the target discharge temperature can be obtained.
Page 94 SiBE12-620 Function of Main Structural Parts 2.2.2 Cooling Only Model Expansion valve Compressor (R4601) A Outdoor Heat 1. The outdoor heat exchanger thermistor is used for controlling target discharge temperature. Exchanger The system sets a target discharge temperature according to the outdoor and indoor heat Thermistor exchanger temperature, and controls the electronic expansion valve opening so that the target discharge temperature can be obtained.
Page 95 Function of Main Structural Parts SiENBE12-620 D Indoor Heat 1. The indoor heat exchanger thermistors are used for controlling target discharge Exchanger temperature. Thermistor The system sets a target discharge pipe temperature according to the outdoor and indoor heat exchanger temperature, and controls the electronic expansion valve opening so that the target discharge temperature can be obtained.
Page 96: Control Specification
SiBE12-620 Control Specification 3. Control Specification Mode Hierarchy Outline There are two modes; the mode selected in user’s place (normal air conditioning mode) and forced operation mode for installation and providing service. Detail 1. For heat pump model There are following modes; stop, cooling (includes drying), heating (include defrosting) Air conditioner control mode Forced operating mode Forced cooling...
Page 97: Frequency Control
Control Specification SiENBE12-620 Frequency Control Outline Frequency that corresponds to each room’s capacity will be determined according to the difference in the temperature of each room and the temperature that is set by the remote control. The function is explained as follows. 1.
Page 98 SiBE12-620 Control Specification 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 99: Controls At Mode Changing / Start-Up
Control Specification SiENBE12-620 Controls at Mode Changing / Start-up 3.3.1 Preheating Operation Outline Operate the inverter in the open phase operation with the conditions including the preheating command from the indoor, the outdoor air temperature and discharge pipe temperature. The power consumption of preheating operation is 35W. (The total power consumption depends on the number of the indoor units.) Detail Preheating ON Condition...
Page 100: Compressor Protection Function
SiBE12-620 Control Specification 3.3.5 Compressor Protection Function When turning the compressor from OFF to ON, the upper limit of frequency must be set as follows. (The function must not be used when defrosting (only for heat pump model).) Frequency 2YC36 FCG3 FCG 3 FCG2...
Page 101: Discharge Pipe Control
Control Specification SiENBE12-620 Discharge Pipe Control Outline The discharge pipe temperature is used as the compressor's internal temperature. If the discharge pipe temperature rises above a certain level, the operating frequency upper limit is set to keep this temperature from going up further. Detail Zones (typical value) 110°C...
Page 102: Freeze-Up Protection Control
SiBE12-620 Control Specification Freeze-up Protection Control Outline During cooling operation, the signals being sent from the indoor unit allow the operating frequency limitation and then prevent freezing of the indoor heat exchanger. Detail Conditions for Start Controlling Judge the controlling start with the indoor heat exchanger temperature after 2 sec from operation start and after 30 sec from changing number of operation room.
Page 103: Fan Control
Control Specification SiENBE12-620 Fan Control Outline Fan control is carried out with following functions. 1. Fan ON control for electric component cooling fan 2. Fan control when defrosting 3. Fan OFF delay when stopped 4. ON/OFF control when cooling operation 5.
Page 104: Defrost Control
SiBE12-620 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 Under the conditions that the system is in heating operation, 6 minutes after the compressor is started and more than 38 minutes of accumulated time pass since the start of the operation or ending the defrosting.
Page 105: Electronic Expansion Valve Control
Control Specification SiENBE12-620 3.11 Electronic Expansion Valve Control Outline The following items are included in the electronic expansion valve control. Electronic expansion valve is fully closed 1. Electronic expansion valve is fully closed when turning on the power. 2. Pressure equalizing control Room Distribution Control 1.
Page 106 SiBE12-620 Control Specification Detail The followings are the examples of control which function in each mode by the electronic expansion valve control. Operation pattern : function × : not function When power is turned ON × × × × × ×...
Page 107 Control Specification SiENBE12-620 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. The electronic expansion valves are closed further with 720 pulse, and then opened with 150 pulse.
Page 108 SiBE12-620 Control Specification 3.11.7 Disconnection of the Discharge Pipe Thermistor Outline Detect a disconnected discharge pipe thermistor by comparing the discharge pipe temperature with the condensation temperature. If any is disconnected, open the electronic expansion valve according to the outdoor air temperature and the operating frequency and operate for a specified time, and then stop.
Page 109: Malfunctions
Control Specification SiENBE12-620 3.12 Malfunctions 3.12.1 Sensor Malfunction Detection Sensor malfunction may occur either in the thermistor or current transformer (CT) system. Relating to Thermistor Malfunction 1. Outdoor heat exchanger thermistor 2. Discharge pipe thermistor 3. Fin thermistor 4. Gas pipe thermistor 5.
Page 110: Forced Operation Mode
SiBE12-620 Control Specification Detail Judgment by Input Current When an output frequency is exceeds 54 Hz and the input current is less than specified value, the adjustment is made for insufficient gas. Judgment by Discharge Pipe Temperature When discharge pipe temperature is 20°C higher than target value and the electronic expansion value opening is 450 plus (max.), the adjustment is made for insufficient gas.
Page 111: Wiring-Error Check
Control Specification SiENBE12-620 3.14 Wiring-Error Check Outline The convenient Wiring Error Check function is designed for the microcomputer to correct wiring errors itself. If local wiring is unclear in the case of buried piping, for example, just press the wiring error check switch that is behind the right-hand panel of the outdoor unit.
Page 112 SiBE12-620 Control Specification Checking the Those data can be checked by looking at the service monitor LED indicators, when the wiring current setting error checking is over, during forced operation, at the stop of the system. data on the The LED indicators stop flashing when the forced operation is over. microcomputer LED1…Room A wiring, LED2…Room B wiring 1st flashing LED…Port A piping, 2nd flashing LED…Port B piping...
Page 113: Additional Function
Control Specification SiENBE12-620 3.15 Additional Function 3.15.1 Connection Pipe Condensation Preventing Function This control is intended to adjust the electronic expansion valve opening so that the outdoor unit gas pipe temperature (GDN) be kept below 8°C. 3.15.2 Priority Room Setting Electronic expansion valves are controlled to provide the unit designated as the priority room with the capacity of other room units.
Page 114 SiBE12-620 Control Specification 3.15.4 Cooling / Heating Mode Lock Use the S15 connector to set the unit to only cool or heat. Setting to only heat (H): Short-circuit pins 1 and 3 of the connector <S15>. Setting to only cool (C): short-circuit pins 3 and 5 of the connector <S15>. The following specifications apply to the connector housing and pins.
Page 115 Control Specification SiENBE12-620 Function and Control...
Page 116: Part 5 System Configuration
SiENBE12-620 Part 5 System Configuration 1. System Configuration................108 1.1 Operation Instructions ................108 2. Instruction....................109 2.1 Wall Mounted, Duct, Floor/Ceiling, Floor Standing Type .....109 2.2 Ceiling Suspended Type ..............192 System Configuration...
Page 117: System Configuration
System Configuration SiENBE12-620 1. System Configuration Operation Instructions 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 118: Instruction
SiENBE12-620 Instruction 2. Instruction Wall Mounted, Duct, Floor/Ceiling, Floor Standing Type 2.1.1 Manual Contents and Reference Page Wall Mounted Type H2 Model Series F(A)TXG25/35E, FTK(X)S20-50D, FTK(X)S20-35C, FTK(X)S50E, C(A)TXG50E ATXS20-50E ATXS20-35D ATX50E Read before Operation Safety Precautions Names of Parts Preparation before Operation H1 Operation AUTO, DRY, COOL, HEAT, FAN Operation H1...
Page 119: Safety Precautions
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 120: Installation Site
SiENBE12-620 Instruction • To avoid oxygen deficiency, ventilate the room sufficiently if equipment with burner is used together with the air conditioner. • Before cleaning, be sure to stop the operation, turn the breaker off or pull out the supply cord.
Page 121 Instruction SiENBE12-620 2.1.3 Names of Parts FTXG 25/35 E, CTXG 50 E, ATXG 25/50E Indoor Unit (With the panel closed) System Configuration...
Page 122 SiENBE12-620 Instruction Outdoor Unit Indoor Unit 1. Air filter • The operation mode refers to the following 2. Titanium Apatite Photocatalytic Air- table. Purifying Filter: Temperature Air flow • These filters are attached to the inside of Mode setting rate the air filters.
Page 123 Instruction SiENBE12-620 Remote control 1. Signal transmitter: 8. SILENT button: OUTDOOR UNIT • It sends signals to the indoor unit. SILENToperation 2. Display: 9. FAN setting button: • It displays the current settings. • It selects the air flow rate setting. 10.
Page 124 SiENBE12-620 Instruction FTK(X)S 20-50 D, ATXS 20-50 E Indoor Unit ON/OFF System Configuration...
Page 125 Instruction SiENBE12-620 Outdoor Unit Indoor Unit 1. Air filter 12. Indoor Unit ON/OFF switch: 2. Titanium Apatite Photocatalytic Air- • Push this switch once to start operation. Purifying Filter: Push once again to stop it. • These filters are attached to the inside of •...
Page 126 SiENBE12-620 Instruction Remote control ECONO ON/OFF TEMP POWERFUL MODE SWING SILENT COMFORT SENSOR CANCEL TIMER < > ARC433A50, 43 1. Signal transmitter: 8. SILENT button: • It sends signals to the indoor unit. OUTDOOR UNIT SILENT operation 2. Display: 9. FAN setting button: •...
Page 127 Instruction SiENBE12-620 FTK(X)S 20/35 C, ATXS 20/35 D Indoor Unit System Configuration...
Page 128 SiENBE12-620 Instruction Outdoor Unit Indoor Unit 1. Air filter 12. Indoor Unit ON/OFF switch: 2. Air-Purifying Filter with photocatalytic • Push this switch once to start operation. deodorizing function: Push once again to stop it. • These filters are attached to the inside of •...
Page 129 Instruction SiENBE12-620 Remote control 1. Signal transmitter: 8. SILENT button: • It sends signals to the indoor unit. OUTDOOR UNIT SILENT operation 2. Display: 9. FAN setting button: • It displays the current settings. (In this • It selects the air flow rate setting. 10.
Page 130 SiENBE12-620 Instruction FTK(X)S 50 E, ATX 50 E Indoor Unit Main unit control panel System Configuration...
Page 131 Instruction SiENBE12-620 Outdoor Unit Indoor Unit 1. Air filter 14. Indoor Unit ON/OFF switch: 2. Titanium Apatite Photocatalytic Air- • Push this switch once to start operation. Purifying Filter: Push once again to stop it. • These filters are attached to the inside of •...
Page 132 SiENBE12-620 Instruction Remote control < > ARC433A21, A22 1. Signal transmitter: 8. SILENT button: • It sends signals to the indoor unit. for OUTDOOR UNIT SILENT operation 2. Display: 9. FAN setting button: • It displays the current settings. (In this •...
Page 133 Instruction SiENBE12-620 FDK(X)S 25/50 C, FDK(X)S 25/35 E Indoor Unit System Configuration...
Page 134 SiENBE12-620 Instruction Outdoor Unit Indoor Unit 1. Air outlet 10. Indoor Unit ON/OFF switch: 2. Air outlet grille: (Field supply) • Push this switch once to start operation. • Appearance of the Air outlet grille and Air Push once again to stop it. inlet grille may differ with some models •...
Page 135 Instruction SiENBE12-620 Remote control 〈ARC433A7,A8〉 1. Signal transmitter: 7. MODE selector button: • It sends signals to the indoor unit. • It selects the operation mode. 2. Display: (AUTO/DRY/COOL/HEAT/FAN) 8. SILENT button: • It displays the current settings. (In this illustration, each section is shown with all its for OUTDOOR UNIT SILENT operation 9.
Page 136 SiENBE12-620 Instruction FLK(X)S 25/50/ B Indoor Unit The indoor unit can be installed either to the ceiling or to a wall. The descriptions contained in this manual show the case when installation is being carried out to the ceiling. (The methods of operation used are the same when installing to a wall.) Opening the front panel How to open the front panel CAUTION...
Page 137 Instruction SiENBE12-620 Outdoor Unit Indoor Unit 1. Louvers (vertical blades): 13. Indoor unit ON/OFF switch: The louvers are inside of the air outlet. • Push this switch once to start operation. 2. Air outlet Push once again to stop it. 3.
Page 138 SiENBE12-620 Instruction Remote Control HOME LE AV E ON/OFF TEMP PO WERFUL MODE FA N SWING SILENT CANCE L TIME R < > ARC433A5 1. Signal transmitter: 7. MODE selector button: • It sends signals to the indoor unit. • It selects the operation mode.
Page 139 Instruction SiENBE12-620 FVK(X)S 25/50 B Indoor Unit Opening the front panel How to open the front panel: Air outlet selection switch 12 13 • This setting blows air from upper outlet only. This setting automatically decides a blow • pattern depending on mode and conditions. •...
Page 140 SiENBE12-620 Instruction Outdoor Unit Indoor Unit 1. Photocatalytic deodorizing filter and Air • The operation mode refers to the following purifying filter: table. • These filters are attached to the inside of Temperature Air flow the air filters. Mode setting rate 2.
Page 141 Instruction SiENBE12-620 Remote Control HOME LEAVE ON/OFF TEMP POWERFUL MODE SWING SILENT CANCEL TIMER < > ARC433A5,A6 1. Signal transmitter: 7. MODE selector button: • It sends signals to the indoor unit. • It selects the operation mode. 2. Display: (AUTO/DRY/COOL/HEAT/FAN) 8.
Page 142: Preparation Before Operation
SiENBE12-620 Instruction 2.1.4 Preparation before Operation To set the batteries 1. Slide the front cover to take it off. Position 2. Set two dry batteries (AAA). correctly! 3. Set the front cover as before. ATTENTION About batteries • When replacing the batteries, use batteries of the same type, and replace the two old batteries together. •...
Page 143 Instruction SiENBE12-620 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 144 SiENBE12-620 Instruction 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 145 Instruction SiENBE12-620 2.1.5 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.
Page 146 SiENBE12-620 Instruction To change the air flow rate setting 5. Press “FAN setting button”. DRY mode AUTO or COOL or HEAT or FAN mode Five levels of air flow rate setting from “ ” to “ ” plus “ ” “ ”...
Page 147: Adjusting The Air Flow Direction
Instruction SiENBE12-620 2.1.6 Adjusting the Air Flow Direction FTXG 25/35 E, CTXG 50 E, ATXG 25/50 E You can adjust the air flow direction to increase your comfort. To adjust the horizontal blade (flap) 1. Press “SWING button ”. • “...
Page 148 SiENBE12-620 Instruction To start COMLFORT AIRFLOW operation 5. Press “COMFORT AIRFLOW button”. • The flap orientationl change, preventing air from blowing directly on the occupants of the room. • “ ” is displayed on the LCD. • [COOL/DRY] The flap will go up. •...
Page 149 Instruction SiENBE12-620 FTK(X)S 20-50 D, ATXS 20-50 E You can adjust the air flow direction to increase your comfort. To adjust the horizontal blades (flaps) 1. Press “SWING button ”. “ ” is displayed on the LCD and the flaps will begin to swing. 2.
Page 150 SiENBE12-620 Instruction To start COMFORT AIRFLOW operation 3. Press “COMFORT AIRFLOW button”. • The flap position will change, preventing air from blowing directly on the occupants of the room. • “ ” is displayed on the LCD. • [COOL/DRY] The flap will go up. •...
Page 151 Instruction SiENBE12-620 FTK(X)S 20/35 C, ATXS 20/35 D You can adjust the air flow direction to increase your comfort. To adjust the horizontal blades (flaps) 1. Press “SWING button”. • “ ” is displayed on the LCD and the flaps will begin to swing. 2.
Page 152 SiENBE12-620 Instruction To adjust the vertical blades (louvers) 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 louvers angles. When “SWING button” is selected, the flaps swinging range depends •...
Page 153 Instruction SiENBE12-620 FTK(X)S 50 E, ATX 50 E You can adjust the air flow direction to increase your comfort. To adjust the horizontal blade (flap) 1. Press “SWING button ”. • “ ” is displayed on the LCD and the flaps will begin to swing.
Page 154 SiENBE12-620 Instruction To 3-D Airflow 1.3. Press the “SWING button ” and the “SWING button ”:the “ ” and “ ” display will light up and the flap and louvers will move in turn. To cancel 3-D Airflow 2.4. Press either the “SWING button ”...
Page 155 Instruction SiENBE12-620 FLK(X)S 25-50 B You can adjust the air flow direction to increase your comfort. To adjust the horizontal blade (flap) 1. Press “SWING button” • “ ” is displayed on the LCD and the flaps will begin to swing. 2.
Page 156 SiENBE12-620 Instruction To adjust the vertical blades (louvers) • When adjusting the louver, use a robust and stable stool and watch your steps carefully. Hold the knob and move the louvers. (You will find a knob on the left side and the right side blades.) Notes on flap and louvers angles.
Page 157 Instruction SiENBE12-620 FVK(X)S 25-50 B You can adjust the air flow direction to increase your comfort. To adjust the horizontal blade (flap) 1. Press “SWING button”. • “ ” is displayed on the LCD and the flaps will begin to swing. 2.
Page 158: Air Flow Selection
SiENBE12-620 Instruction Air flow selection • Make air flow selection according to what suits you. When setting the air flow selection switch to • Air conditioner automatically decides the appropriate blowing pattern depending on the operating mode/situation. Operating mode Situation Blowing pattern •...
Page 159: Powerful Operation
Instruction SiENBE12-620 2.1.7 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 160 SiENBE12-620 Instruction 2.1.8 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 161: Econo Operation
Instruction SiENBE12-620 2.1.9 ECONO Operation ECONO operation is a function which enables efficient operation by lowering the maximum power consumption value. To start ECONO operation 1. Press “ECONO button”. • “ ” is displayed on the LCD. To cancel ECONO operation 2.
Page 162 SiENBE12-620 Instruction 2.1.10 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”. • “ ” is displayed on the LCD. •...
Page 163 Instruction SiENBE12-620 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. You can start your favorite operation mode simply by pressing the HOME LEAVE button on the remote control.
Page 164: Intelligent Eye Operation
SiENBE12-620 Instruction 2.1.11 INTELLIGENT EYE Operation FTK(X)S 20-50 D, FTK(X)S 50 E, ATXS 20-50 E, ATX 50 E “INTELLIGENT EYE” is the infrared sensor which detects the human movement. To start INTELLIGENT EYE operation 1. Press “SENSOR button”. • “ ”...
Page 165 Instruction SiENBE12-620 “INTELLIGENT EYE” is useful for Energy Saving Energy saving operation • Change the temperature -2°C in heating / +2°C in cooling / +2°C in dry mode from set temperature. • Decrease the air flow rate slightly in fan operation. (In FAN mode only) Notes on “INTELLIGENT EYE”...
Page 166 SiENBE12-620 Instruction FTK(X)S 20-35 C, ATXS 20-35 D “INTELLIGENT EYE” is the infrared sensor which detects the human movement. To start INTELLIGENT EYE operation 1. Press “SENSOR button”. • “ ” is displayed on the LCD. To cancel the INTELLIGENT EYE operation 2.
Page 167 Instruction SiENBE12-620 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 sensor • Gently push and slide the sensor to adjust the angle.
Page 168 SiENBE12-620 Instruction FTXG 25/35 E, CTXG 50 E, ATXG 25-50 E “INTELLIGENT EYE” is the infrared sensor which detects the human movement. To start INTELLIGENT EYE operation 1. Press “SENSOR button”. • “ ” is displayed on the LCD. To cancel the INTELLIGENT EYE operation 2.
Page 169 Instruction SiENBE12-620 “INTELLIGENT EYE” is useful for Energy Saving Energy saving operation • Change the temperature -2°C in heating / +2°C in cooling / +2°C in dry mode from set temperature. • Decrease the air flow rate slightly in fan operation. (In FAN mode only) Notes on “INTELLIGENT EYE”...
Page 170: Timer Operation
SiENBE12-620 Instruction 2.1.12 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 171 Instruction SiENBE12-620 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. Press “TIMER Setting button” until the time setting reaches the point you like.
Page 172: Note For Multi System
SiENBE12-620 Instruction 2.1.13 Note for Multi System <<What is a “Multi System”? >> This system has one outdoor unit connected to multiple indoor units. Functions depend on the model. See the list of functions and applicable models (*2) on the next page. room Outdoor Selecting the Operation Mode...
Page 173 Instruction SiENBE12-620 Priority Room Setting The Priority Room Setting requires initial programming during installation. Please consult your retailer or dealer for assistance. The room designated as the Priority Room takes priority in the following situations: 1. Operation Mode Priority As the operation mode of the Priority Room takes precedence, the user can select a different operation mode from other rooms.
Page 174: Care And Cleaning
SiENBE12-620 Instruction 2.1.14 Care and cleaning FTXG 25/35 E, CTXG 50 E, ATXG 25-50 E CAUTION • Before cleaning, be sure to stop the operation and turn the breaker OFF. • Always shut down the unit (and close the panel) before doing any work. Opening the panel during operation may cause the panel to fall off.
Page 175 Instruction SiENBE12-620 FILTERS 1. Open the front panel. • Open the front panel by placing a finger on the panel tab on either side of the front panel and then secure it using the supporting plate on the right. Supporting plate 2.
Page 176 SiENBE12-620 Instruction NOTE • Operation with dirty filters: (1) cannot deodorize the air. (2) cannot clean the air. (3) results in poor heating or cooling. (4) may cause odour. • To order Titanium Apatite Photocatalytic Air-Purifying Filter contact to the service shop there you bought the air conditioner.
Page 177 Instruction SiENBE12-620 FTK(X)S 20-50 D, ATXS 20-50 E 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 panel 1. Open the front panel. •...
Page 178 SiENBE12-620 Instruction 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 Photodcatalytic • Hold the recessed parts of the frame and unhook the four claws.
Page 179 Instruction SiENBE12-620 NOTE • Operation with dirty filters: (1) cannot deodorize the air. (2) cannot clean the air. (3) results in poor heating or cooling. (4) may cause odour. • To order Titanium Apatite Photocatalytic Air-Purifying Filter contact the service shop where you bought the air conditioner.
Page 180 SiENBE12-620 Instruction FTK(X)S 20-35 C, ATXS 20-35 D 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 panel 1. Open the front panel. •...
Page 181 Instruction SiENBE12-620 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 air purifying filter with photocatalytic deodorizing function.
Page 182 SiENBE12-620 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 183 Instruction SiENBE12-620 FTK(X)S 50 E, ATX 50 E 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 panel 1. Open the front panel. •...
Page 184 SiENBE12-620 Instruction 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 tabs (3 tabs at top) Photocatalytic Air-Purifying Filter.
Page 185 Instruction SiENBE12-620 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 186 SiENBE12-620 Instruction FDK(X)S 25/35 C CAUTION • Only a qualified service person is allowed to perform maintenance. • Before cleaning, be sure to stop the operation and turn the breaker OFF. Cleaning the air filter 1. Removing the air filter. •...
Page 187 • Clean the drain pan periodically, or drain piping may be clogged with dust and may result in water leakage. Ask your DAIKIN dealer to clean them. • Prepare a cover locally to prevent any dust in the air around the indoor unit from getting in the drain pan, if there is a great deal of dust present.
Page 188 SiENBE12-620 Instruction FDK(X)S 25/35 E, FDK(X)S 50 C CAUTION • Only a qualified service person is allowed to perform maintenance. • Before cleaning, be sure to stop the operation and turn the breaker OFF. Cleaning the air filter 1. Removing the air filter. •...
Page 189 • Clean the drain pan periodically, or drain piping may be clogged with dust and may result in water leakage. Ask your DAIKIN dealer to clean them. • Prepare a cover locally to prevent any dust in the air around the indoor unit from getting in the drain pan, if there is a great deal of dust present.
Page 190 SiENBE12-620 Instruction FLK(X)S 25-50 B 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 panel 1. Open the front panel. •...
Page 191 Instruction SiENBE12-620 FILTERS 1. Open the front panel. 2. Pull out the air filters. • Push upwards the tab at the center of filter, then pull it down. 3. Take off the air purifying filter, photocatalytic deodorizing filter. • Hold the recessed parts of the frame and unhook the four claws.
Page 192 SiENBE12-620 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 193 Instruction SiENBE12-620 FLK(X)S 25-50 B 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 panel 1. Open the front panel. •...
Page 194 SiENBE12-620 Instruction FILTERS 1. Open the front panel. 2. Remove the air filters • Press the claws on the right and left of the air filter down slightly, then pull upward. 3. Take off the air purifying filter, photocatalytic deodorizing filter. •...
Page 195 Instruction SiENBE12-620 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 196 SiENBE12-620 Instruction 2.1.15 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 Operation does not start soon. • This is to protect the air conditioner.You should wait for about 3 minutes. •...
Page 197: Check Again
Instruction SiENBE12-620 Check again Please check again before calling a repair person. Case Check The air conditioner does not operate. • Hasn’t a breaker turned OFF or a fuse blown? (OPERATION lamp is off) • Isn’t it a power failure? •...
Page 198: Disposal Requirements
SiENBE12-620 Instruction Call the service shop immidiality. 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.
Page 199: Fault Diagnosis
Instruction SiENBE12-620 FAULT DIAGNOSIS 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.
Page 200 SiENBE12-620 Instruction LED ON OUTDOOR UNIT PCB 3MXS, 3MKS, 4MXS, 4MKS series GREEN MICROCOMPUTER MALFUNCTION NORMAL DETECTION LED-A LED1 LED2 LED3 LED4 DIAGNOSIS NORMAL CHECK INDOOR UNIT HIGH PRESSURE PROTECTOR WORKED OR FREEZE-UP IN OPERATING UNIT OR STAND-BY UNIT * OVERLOAD RELAY WORKED OR HIGH DISCHARGE PIPE TEMPERATURE FAULTY COMPRESSOR START INPUT OVERCURRENT * THERMISTOR OR CT ABNORMALITY...
Page 201: Ceiling Suspended Type
Instruction SiENBE12-620 Ceiling Suspended Type 5 12 TEST AVAILABLE TEST System Configuration...
Page 202 SiENBE12-620 Instruction • The precautions described below are WARNING and Do not use any fuse with improper capacity. CAUTION. These are very important precautions The use of a piece of wire and whatnot may result in a concerning safety. Be sure to observe all of them failure and fire.
Page 203 Instruction SiENBE12-620 Be sure the air conditioner is electrically grounded. HEATING Do not connect the grounding conductor to a gas pipe, water pipe, lightning arrester and the grounding conductor INDOOR OUTDOOR OUTDOOR UNIT for a telephone. TEMPERATURE TEMPERATURE Imperfect grounding work may result in an electric shock. –...
Page 204 SiENBE12-620 Instruction • Make sure that a separate power supply circuit is provided for this air conditioner and that all electrical DISPLAY “ ” “ ” “ ” “ ” “ ” work is carried out by qualified personnel according to (OPERATION MODE) local laws and regulations.
Page 205 • Operating procedure varies with heat pump type and shows “ ”. cooling only type. Contact your Daikin dealer to confirm • After 6 to 8 minutes (maximum 10 minutes) of DEFROST your system type. OPERATION, the system returns to HEATING •...
Page 206: Temperature Setting
Your hand may get caught if you attempt to make adjustments while the unit is swinging. B. Left and right direction A. Up and down direction • The movable limit of the flap is changeable. Contact your Daikin dealer for details. System Configuration...
Page 207: Program Timer Operation
Instruction SiENBE12-620 Program timer operation 5. Optimum operation Operate in the following order. Observe the following precautions to ensure the system • The timer is operated in the following two ways. operates. • Programming the stop time ( ) ... The system stops •...
Page 208 SiENBE12-620 Instruction How to clean the air filter 6. Maintenance (for service personnel) Clean the air filter when the display shows “ ” Only a qualified service person is allowed to perform (TIME TO CLEAN AIR FILTER). maintenance It will display that it will operate for a set amount of time. Increase the frequency of cleaning if the unit is installed in a IMPORTANT! room where the air is extremely contaminated.
Page 209 Instruction SiENBE12-620 How to clean air outlet and outside panels Turn on the main power supply switch • The display on the remote control will be shown when the • Clean with soft cloth. power is turned on. • When it is difficult to remove stains, use water or neutral •...
Page 210 It is necessary to clean the inside of the indoor This is because operating mode is controlled by a unit. Ask your Daikin dealer for details on cleaning the unit micro computer, as shown below, depending on the This operation requires a qualified service person.
Page 211 If the heat source of the room is excessive (when cooling). Cooling effect decreases if heat gain of the room is too large. UNIT No. INDOOR UNIT No. in which INSPECTION a malfunction occurs display MALFUNCTION CODE Measure: Notify your Daikin dealer and inform him/her of the display. System Configuration...
Page 212: Part 6 Service Diagnosis
SiENBE12-620 Part 6 Service Diagnosis 1. Caution for Diagnosis................204 1.1 Troubleshooting with Operation Lamp ..........204 2. Problem Symptoms and Measures .............206 3. Service Check Function ..............207 4. Code Indication on the remote control ..........210 4.1 Error Codes and Description of Fault ...........210 5.
Page 213: Caution For Diagnosis
Caution for Diagnosis SiENBE12-620 1. Caution for Diagnosis Troubleshooting with Operation Lamp 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.
Page 214 SiENBE12-620 Caution for Diagnosis In case of In case of FVK(X)S 25/35/50 B Series FLK(X)S 25/35/50 B Series OPERATION lamp (green) OPERATION lamp (green) (Q0341) (Q0342) Caution: Operation stops suddenly. (Operation lamp blinks.) Cause of above trouble could be "Operation mode conflict". Check followings;...
Page 215: Problem Symptoms And Measures
Problem Symptoms and Measures SiENBE12-620 2. Problem Symptoms and Measures Problem Symptom Check Item Details of Measure Page to be referred None of the units operates. Check the power supply. Check to make sure that the rated voltage is — supplied.
Page 216: Service Check Function
SiENBE12-620 Service Check Function 3. Service Check Function In the ARC433A series remote control, the temperature display sections on the main unit indicate corresponding codes. Check Method 1 1. When the timer cancel button is held down for 5 seconds, a “00” indication flashes on the temperature display section.
Page 217 Service Check Function SiENBE12-620 Check Method 2 1. Enter the diagnosis mode. Press the 3 buttons (TEMP s ,TEMP t , MODE) simultaneously. (R4272) The digit of the number of tens blinks. HTry again from the start when the digit does not blink. (R4273) 2.
Page 218 SiENBE12-620 Service Check Function 5. Press the TEMP button. Press TEMP s or TEMP t and change the digit until you hear the sound of “beep”. (R4277) 6. Diagnose by the sound. H“pi” : The both numbers of tens and units do not accord with the error code. H“pi pi”...
Page 219: Code Indication On The Remote Control
Code Indication on the remote control SiENBE12-620 4. Code Indication on the remote control Error Codes and Description of Fault Code Indication Description of Problem System Normal Insufficient gas Low-voltage detection or over-voltage detection Signal transmission error (between indoor and outdoor units) Signal transmission error (on outdoor unit PCB) Unspecified voltage (between indoor and outdoor units) Anti-icing function in other rooms...
Page 220: Troubleshooting
SiENBE12-620 Troubleshooting 5. Troubleshooting Indoor Units - : Not used for troubleshooting ∗ : Varies depending on the cases. Indication on the Description of the Fault Details of fault remote control (Refer to the indicated page.) Indoor unit in normal condition (Conduct a diagnosis of the outdoor unit.) —...
Page 221: Outdoor Units
Troubleshooting SiENBE12-620 Outdoor Units : ON, : OFF, : Blinks Green : Flashes when in normal condition Red : OFF in normal condition - : Not used for troubleshooting ∗ : Varies depending on the cases. Outdoor Unit LED Indication Indication on Description of The Fault the remote...
Page 222: Indoor Unit Pcb Abnormality
SiENBE12-620 Troubleshooting Indoor Unit PCB Abnormality remote control Display Method of Evaluation of zero-cross detection of power supply by indoor unit. Malfunction Detection Malfunction When there is no zero-cross detection in approximately 10 continuous seconds. Decision Conditions Supposed Faulty indoor unit PCB Causes Faulty connector connection Troubleshooting...
Page 223: Freeze-Up Protection Control Or High Pressure Control
Troubleshooting SiENBE12-620 Freeze-up Protection Control or High Pressure Control remote control Display Method of High pressure control (heat pump model only) Malfunction During heating operations, the temperature detected by the indoor heat exchanger Detection thermistor is used for the high pressure control (stop, outdoor fan stop, etc.) The freeze-up protection control (operation halt) is activated during cooling operation according to the temperature detected by the indoor unit heat exchanger thermistor.
Page 224 SiENBE12-620 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 Check the air passage. Refer to P.255 Is there any Provide sufficient air passage. short-circuit? Check the intake air filter. Is it very dirty? Clean the air filter.
Page 225: Fan Motor Or Related Abnormality
Troubleshooting SiENBE12-620 Fan Motor or Related Abnormality 5.5.1 AC Motor remote control Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine Malfunction abnormal fan motor operation. Detection Malfunction When the detected rotation speed does not reach the demanded rotation speed of the target Decision tap, and is less than 50% of the maximum fan motor rotation speed.
Page 226 SiENBE12-620 Troubleshooting 5.5.2 DC Motor remote control Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine Malfunction abnormal fan motor operation. Detection Malfunction When the detected rotation speed does not reach the demanded rotation speed of the target Decision tap, and is less than 50% of the maximum fan motor rotation speed.
Page 227 Troubleshooting SiENBE12-620 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.01 Turn off power supply Refer to P.252 and rotate fan by hand. Check No.02 Does fan rotate Replace fan motor.
Page 228: Thermistor Or Related Abnormality (Indoor Unit)
SiENBE12-620 Troubleshooting Thermistor or Related Abnormality (Indoor Unit) C4, C9 C4, C9 remote control Display Method of The temperatures detected by the thermistors are used to determine thermistor errors. Malfunction Detection Malfunction When the thermistor input is more than 4.96 V or less than 0.04 V during compressor Decision operation∗.
Page 229: Shutter Drive Motor / Shutter Limit Switch Abnormality
Troubleshooting SiENBE12-620 Shutter Drive Motor / Shutter Limit Switch Abnormality remote control Display Method of The shutter open / close performance is detected by the limit switch attached on its structure. In Malfunction this way, the shutter drive motor and the shutter limit switch are checked for failure. Detection Malfunction When the shutter is open, the limit switch is closed.
Page 230: Signal Transmission Error (Between Indoor And Outdoor Units)
SiENBE12-620 Troubleshooting Signal Transmission Error (between Indoor and Outdoor Units) remote control Display Method of The data received from the outdoor unit in indoor unit-outdoor unit signal transmission is Malfunction checked whether it is normal. Detection Malfunction When the data sent from the outdoor unit cannot be received normally, or when the content of Decision the data is abnormal.
Page 231: Unspecified Voltage (Between Indoor And Outdoor Units)
Troubleshooting SiENBE12-620 5.9 Unspecified Voltage (between Indoor and Outdoor Units) remote control Display Method of The supply power is detected for its requirements (different from pair type and multi type) by the Malfunction indoor / outdoor transmission signal. Detection Malfunction The pair type and multi type are interconnected.
Page 232: Freeze-Up Protection Control
SiENBE12-620 Troubleshooting 5.10 Freeze-up Protection Control remote control Display Outdoor Unit LED Display Method of Indoor unit icing, during cooling operation, is detected by checking the temperatures sensed by Malfunction the indoor unit heat exchanger thermistor and room temperature thermistor that are located in a Detection shut-down room.
Page 233 Troubleshooting SiENBE12-620 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.04 Refer to P.253 Check the wiring and piping. Check No.06 Activate the wiring error Wiring or piping out of spec? Refer to P.255 check mode.
Page 234: Outdoor Unit Pcb Abnormality
SiENBE12-620 Troubleshooting 5.11 Outdoor Unit PCB Abnormality remote control Display Outdoor Unit LED Display Method of Detect within the programme of the microcomputer that the programme is in normal running Malfunction order. Detection Malfunction When the programme of the microcomputer is in abnormal running order. Decision Conditions Supposed...
Page 235: Ol Activation (Compressor Overload)
Troubleshooting SiENBE12-620 5.12 OL Activation (Compressor Overload) remote control Display Outdoor Unit LED Display Method of A compressor overload is detected through compressor OL. Malfunction Detection Malfunction If the compressor OL is activated twice, the system will be shut down. Decision The error counter will reset itself if this or any other error does not occur during the following Conditions...
Page 236: Compressor Lock
SiENBE12-620 Troubleshooting 5.13 Compressor Lock remote control Display Outdoor Unit LED Display Method of A compressor lock is detected by checking the compressor running condition through the Malfunction position detection circuit. Detection Malfunction Judging from current waveform generated when high-frequency voltage is applied to the Decision compressor.
Page 237: Dc Fan Lock
Troubleshooting SiENBE12-620 5.14 DC Fan Lock remote control Display Outdoor Unit LED Display Method of A fan motor line error is detected by checking the high-voltage fan motor rpm being detected by Malfunction the Hall IC. Detection Malfunction The fan does not start in 30 seconds even when the fan motor is running. Decision The system will be shut down if the error occurs 16 times.
Page 238: Input Over Current Detection
SiENBE12-620 Troubleshooting 5.15 Input Over Current Detection remote control Display Outdoor Unit LED Display Method of Malfunction is detected by checking the input current value. Malfunction Detection Malfunction The following condition continues for 2.5 seconds. Decision Input current ≥ 20A (typical value) Conditions The compressor halts if the error occurs, and restarts automatically after 3 minutes stand-by.
Page 239 Troubleshooting SiENBE12-620 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.07 Refer to P.256 Get restarted and measure the input current. Check No.08 Refer to P.257 Input current flowing Replace the outdoor unit above its stop level? PCB.
Page 240: Discharge Pipe Temperature Control
SiENBE12-620 Troubleshooting 5.16 Discharge Pipe Temperature Control remote control Display Outdoor Unit LED Display Method of The discharge pipe temperature control (stop, frequency drooping, etc.) is checked with the Malfunction temperature being detected by the discharge pipe thermistor. Detection Malfunction 2YC36 Decision If the temperature being detected by the discharge pipe thermistor rises above 110°C, the...
Page 241: High Pressure Control In Cooling
Troubleshooting SiENBE12-620 5.17 High Pressure Control in Cooling remote control Display Outdoor Unit LED Display Method of High-pressure control (stop, frequency drop, etc.) is activated in the cooling mode if the Malfunction temperature being sensed by the heat exchanger thermistor exceeds the limit. Detection Malfunction Activated when the temperature being sensed by the heat exchanger thermistor rises above...
Page 242 SiENBE12-620 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.04 Refer to P.253 Check the installation space. Check No.06 Check No.07 Abnormal Refer to P.255 Installation condition Change the air outlet grille check position.
Page 243: Compressor Sensor System Abnormality
Troubleshooting SiENBE12-620 5.18 Compressor Sensor System Abnormality remote control Display Outdoor Unit LED Display Method of Fault condition is identified by the supply voltage and the DC voltage which is detected Malfunction before the compressor startup. Detection Fault condition is identified by compressor current which is detected right after the compressor startup.
Page 244 SiENBE12-620 Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Turn off the power Reactor connection check Connection OK? Connect properly. Compressor connection check Connection OK? Connect properly. Disconnect the reactor from the outdoor unit PCB and measure the resistance Reactor check...
Page 245: Position Sensor Abnormality
Troubleshooting SiENBE12-620 5.19 Position Sensor Abnormality remote control Display Outdoor Unit LED Display Method of A compressor startup failure is detected by checking the compressor running condition through Malfunction the position detection circuit. Detection Malfunction The compressor fails to start in about 15 seconds after the compressor run command signal Decision is sent.
Page 246: Ct Or Related Abnormality
SiENBE12-620 Troubleshooting 5.20 CT or Related Abnormality remote control Display Outdoor Unit LED Display Method of A CT or related error is detected by checking the compressor running frequency and CT- Malfunction detected input current. Detection Malfunction The compressor running frequency is below 55 Hz and the CT input is below 0.1 V. Decision (The input current is also below 0.5 A.) Conditions...
Page 247 Troubleshooting SiENBE12-620 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.12 Turn off the power and turn it on Refer to P.259 again. Get the system started. Replace the outdoor unit PC Current Capacitor charged when...
Page 248: Thermistor Or Related Abnormality (Outdoor Unit)
SiENBE12-620 Troubleshooting 5.21Thermistor or Related Abnormality (Outdoor Unit) P4,J3,J6.J8,J9,H9 P4, J3, J6, J8, J9, H9 remote control Display Outdoor Unit LED Display Method of This type of error is detected by checking the thermistor input voltage to the microcomputer. Malfunction [A thermistor error is detected by checking the temperature being detected by each thermistor.] Detection Malfunction...
Page 249 Troubleshooting SiENBE12-620 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.06 Refer to P.255 Turn on the power again. Error displayed again Reconnect. on remote controller? Connector or thermistor Reconnect.
Page 250: Electrical Box Temperature Rise
SiENBE12-620 Troubleshooting 5.22 Electrical Box Temperature Rise remote control Display Outdoor Unit LED Display Method of An electrical box temperature rise is detected by checking the radiation fin thermistor with the Malfunction compressor off. Detection Malfunction With the compressor off, the radiation fin temperature is above 100°C. Decision The error is cleared when the temperature drops below 85°C.
Page 251 Troubleshooting SiENBE12-620 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.07 WARNING Turn off the power and turn it on Refer to P.256 again. To cool down the electricals, the outdoor unit fan gets started when the radiation fin temperature rises above 100˚C and stops itself...
Page 252: Radiation Fin Temperature Rise
SiENBE12-620 Troubleshooting 5.23 Radiation Fin Temperature Rise remote control Display Outdoor Unit LED Display Method of A radiation fin temperature rise is detected by checking the radiation fin temperature being Malfunction detected by the fin thermistor with the compressor on. Detection Malfunction The radiation fin temperature with the compressor on is above 103°C.
Page 253 Troubleshooting SiENBE12-620 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.07 Turn off the power and turn it on Refer to P.256 again to get the system started. Check No.09 Refer to P.257 Error displayed again?
Page 254: Output Over Current Detection
SiENBE12-620 Troubleshooting 5.24 Output Over Current Detection remote control Display Outdoor Unit LED Display Method of An output over-current is detected by checking the current that flows in the inverter DC section. Malfunction Detection Malfunction A position signal error occurs while the compressor is running. Decision A speed error occurs while the compressor is running.
Page 255 Troubleshooting SiENBE12-620 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.07 Refer to P.256 Check No.08 Stop valve fully open? Fully open the stop valve. Refer to P.257 Turn off the power and turn it on Check No.13 again to get the system started.
Page 256: Insufficient Gas
SiENBE12-620 Troubleshooting 5.25 Insufficient Gas remote control Display Outdoor Unit LED Display Method of Gas shortage detection I: Malfunction Gas shortage is detected by checking the input current value and the compressor running Detection frequency. If the gas is short, the input current is smaller than the normal value. Gas shortage detection II: Gas shortage is detected by checking the discharge temperature and the opening of the electronic expansion valve.
Page 257: Sienbe12
Troubleshooting SiENBE12-620 Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution Check No.04 or parts damage may be occurred. Refer to P.253 Any thermistor Reconnect in position. disconnected? * Discharge pipe thermistor Check No.06 * Indoor / outdoor unit heat exchanger thermistor * Room temperature thermistor Refer to P.255 * Outdoor air thermistor...
Page 258: Low-Voltage Detection Or Over-Voltage Detection
SiENBE12-620 Troubleshooting 5.26 Low-voltage Detection or Over-voltage Detection remote control Display Outdoor Unit LED Display Method of An abnormal voltage rise or drop is detected by checking the detection circuit or DC voltage Malfunction detection circuit. Detection Malfunction An over-voltage signal is fed from the over-voltage detection circuit to the microcomputer, or Decision the voltage being detected by the DC voltage detection circuit is judged to be below 150 V Conditions...
Page 259: Signal Transmission Error (On Outdoor Unit Pcb)
Troubleshooting SiENBE12-620 5.27 Signal Transmission Error (on Outdoor Unit PCB) remote control Display Outdoor Unit LED Display Method of Communication error between microcomputer mounted on the main PCB and PM1. Malfunction Detection Malfunction When the data sent from the PM1 can not be received successively for 9 sec. Decision The abnormality is determined if the above fault conditions occurs once Conditions...
Page 260: Anti-Icing Function In Other Rooms / Unspecified Voltage (Between Indoor And Outdoor Units)
SiENBE12-620 Troubleshooting 5.28 Anti-icing Function in Other Rooms / Unspecified Voltage (between Indoor and Outdoor Units) UA, UH UA, UH remote control Display Outdoor Unit LED Display Method of A wrong connection is detected by checking the combination of indoor and outdoor units on the Malfunction microcomputer.
Page 261: Check
Check SiENBE12-620 6. Check How to Check 6.1.1 Fan Motor Connector Output Check Check No.01 1. Check connector connection. 2. Check motor power supply voltage output (pins 4-7 and 4-8). 3. Check motor control voltage (pins 4-3). 4. Check rotation command voltage output (pins 4-2). 5.
Page 262: Electronic Expansion Valve Check
SiENBE12-620 Check 6.1.3 Electronic Expansion Valve Check Check No.04 Conduct the followings to check the electronic expansion valve (EV). 1. Check to see if the EV connector is correctly inserted in the PCB. Compare the EV unit and the connector number. 2.
Page 263: Four Way Valve Performance Check
Check SiENBE12-620 6.1.4 Four Way Valve Performance Check Check No.05 Turn off the power and turn it on again. Start the heating-mode run. S80 voltage at DC 220-240 V with Replace the outdoor unit compressor on? PCB. (Fig. 1) Disconnect the four way valve coil from the connector and check the continuity.
Page 264: Thermistor Resistance Check
SiENBE12-620 Check 6.1.5 Thermistor Resistance Check Check No.06 Remove the connectors of the thermistors on the PCB, and measure the resistance of each thermistor using tester. The relationship between normal temperature and resistance is shown in the graph and the table below.
Page 265: Installation Condition Check
Check SiENBE12-620 6.1.6 Installation Condition Check Check No.07 Installation condition check Check Abnormal the allowable 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 266: Discharge Pressure Check
SiENBE12-620 Check 6.1.7 Discharge Pressure Check Check No.08 Discharge pressure check High Replace compessor. Open the stop valve. Is the stop valve open? Is the connection pipe deformed? Replace the pipe installed at the site. At the heat exchanger and Clean.
Page 267: Power Supply Waveforms Check
Check SiENBE12-620 6.1.9 Power Supply Waveforms Check Check No.10 Measure the power supply waveform between pins 1 and 3 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]...
Page 268: Capacitor Voltage Check
SiENBE12-620 Check 6.1.11 Capacitor Voltage Check Check No.12 Before this checking, be sure to check the main circuit for short-circuit. Checking the capacitor voltage With the circuit breaker still on, measure the voltage according to the drawing of the model in question.
Page 269: Main Circuit Electrolytic Capacitor Check
Check SiENBE12-620 6.1.13 Main Circuit Electrolytic Capacitor Check Check No.14 Checking the main circuit electrolytic capacitor Never touch any live parts for at least 10 minutes after turning off the circuit breaker. If unavoidably necessary to touch a live part, make sure there is no DC voltage using the tester.
Page 270: Hall Ic Check
SiENBE12-620 Check 6.1.15 Hall IC Check Check No.16 1. Check the connector connection. 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 271 Check SiENBE12-620 Service Diagnosis...
Page 272: Part 7 Removal Procedure
SiENBE12-620 Part 7 Removal Procedure 1. Outdoor Unit..................264 1.1 Removal of the Panels and Plates ............264 1.2 Removal of the Electrical Box ..............269 1.3 Removal of the PCB................276 1.4 Removal of the Propeller Fan / Fan Motor ...........282 1.5 Removal of the Sound Blanket.............284 1.6 Removal of Electronic Expansion Valve Coil, Four Way Valve Coil and Thermistor ...........288 1.7 Removal of the Distributor..............291...
Page 273: Outdoor Unit
Outdoor Unit SiENBE12-620 1. Outdoor Unit Removal of the Panels and Plates Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points External appearance. Take care not to cut your finger by the fins of the heat Top panel exchanger.
Page 274 SiENBE12-620 Outdoor Unit Procedure Points Step Loosen the 6 screws of the front panel. Loosen the 2 screws (each 1 in front and Clamp plate back) of the clamp plate. Slide the clamp plate to the left to undo the hooks and remove the plate.
Page 275 Outdoor Unit SiENBE12-620 Procedure Points Step Lift the front panel up to remove the left side hooks and open the panel. The front panel has the 3 hooks on the left. Hooks The front panel has the 1 hook on the right. Hook Removal Procedure...
Page 276 SiENBE12-620 Outdoor Unit Procedure Points Step Loosen the 4 screws of the discharge grille. Loosen the 2 screws of the stop valve cover. And then slide the Stop valve cover cover downward to remove. Removal Procedure...
Page 277 Outdoor Unit SiENBE12-620 Procedure Points Step When assembling, make sure to catch the 5 hooks. Removal Procedure...
Page 278: Removal Of The Electrical Box
SiENBE12-620 Outdoor Unit Removal of the 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. Disconnect the Illustrations are for 3 room connecting wires model.
Page 279 Outdoor Unit SiENBE12-620 Procedure Points Step 2. Disconnect the each harnesses Fixing tape Detach the fixing tape for the electrical box (cover). Undo the 4 hooks at the mark of the drip proof cover. Lift the cover up to remove. Disconnect the Check the LED through the connector for fan motor...
Page 280 SiENBE12-620 Outdoor Unit Procedure Points Step The figure shows the arrangement of the wire harness for fan motor. Disconnect the The number of the connectors for connectors are different electronic expansion according to the number of valve coil. the connected indoor units. [S20] - White [S21] - Red [S22] - Blue...
Page 281 Outdoor Unit SiENBE12-620 Procedure Points Step Disconnect the connector for overload protector [S40]. Disconnect the connector for relay harness of compressor. Disconnect the each connector. [S90] : Outdoor air, heat exchanger, discharge pipe thermistor [S92] : Gas pipe thermistor [S93] : Liquid pipe thermistor Removal Procedure...
Page 282 SiENBE12-620 Outdoor Unit Procedure Points Step Disconnect the connector for four way valve [S80]. The figure shows the arrangement of the wire harness under the electrical box. Undo the wire clip for the thermistor lead wire. Removal Procedure...
Page 283 Outdoor Unit SiENBE12-620 Procedure Points Step 3. Remove the electrical box Service PCB Loosen the 2 screws of Power supply terminal board the earth terminal. (L) -Black (N) - Whit Wiring fixture 4. Disconnect the power supply connecting wires Loosen the screws on the terminal board and disconnect the wires of A, B, C(, and D) port.
Page 284 SiENBE12-620 Outdoor Unit Procedure Points Step Detach the outdoor air thermistor. Loosen the screw on the right side of the electrical box. Loosen the 1 screw in front of the electrical box. Lift up the electrical box to remove. Removal Procedure...
Page 285: Removal Of The Pcb
Outdoor Unit SiENBE12-620 Removal of the 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 service PCB External appearance of the service PCB and the terminal board.
Page 286 SiENBE12-620 Outdoor Unit Procedure Points Step Widen the upper hook and pull the service PCB upward to remove. 2. Remove the control PCB Disconnect the each connectors on the terminal board. Disconnect the 2 connectors for reactor. Loosen the 3 screws of Slit the PCB.
Page 287 Outdoor Unit SiENBE12-620 Procedure Points Step Undo the 3 hooks on the reactor side and slide the control PCB. Undo the relay harness for compressor from the hook. Lift up the control PCB In working, be careful not to to remove. break the control PCB with the excessive force because the PCB and the radiation fin...
Page 288 SiENBE12-620 Outdoor Unit Procedure Points Step Names of parts on the control PCB. Fuse (FU3) 3.15A 250V Fuse (FU1) Fuse (FU2) 30A 250V 3.15A 250V Loosen the 2 screws of the radiation fin. Radiation fin Loosen the 3 screws of the reactor and the 1 screw of the clamp.
Page 289 Outdoor Unit SiENBE12-620 Procedure Points Step 3. Disconnect the wire harnesses 4. Remove the terminal board Open the electrical box and remove the terminal board. Removal Procedure...
Page 290 SiENBE12-620 Outdoor Unit Procedure Points Step Removal Procedure...
Page 291: Removal Of The Propeller Fan / Fan Motor
Outdoor Unit SiENBE12-620 Removal of the Propeller Fan / 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 fan motor Remove the outer panels fixing plate.
Page 292 SiENBE12-620 Outdoor Unit Procedure Points Step Undo the 2 fixing hooks of the lead wire. Loosen the 4 screws of the fan motor. Lead wire Propeller fan (R3249) When assembling, put the lead wire through the back of the motor. (so as not to be entangled with the propeller fan) Detach the 4 screws...
Page 293: Removal Of The Sound Blanket
Outdoor Unit SiENBE12-620 Removal of the Sound Blanket 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 Remove the outer panels panel and plates.
Page 294 SiENBE12-620 Outdoor Unit Procedure Points Step Pull up the right side panel. Loosen the 2 screws of the wiring fixture. Wiring fixture 2. Remove the partition plate Loosen the 2 screws to remove the partition plate. Detach the clamp of the relay harness for the compressor.
Page 295 Outdoor Unit SiENBE12-620 Procedure Points Step Pull up the partition plate. When assembling, make sure to catch the lower hook of the partition plate. 3. Remove the sound blanket Lift up the sound blanket (top-upper) to remove. Since the piping ports on the sound blanket are torn easily, remove the blanket carefully.
Page 296 SiENBE12-620 Outdoor Unit Procedure Points Step Remove the sound blanket (top-lower). Undo the fixing strings, open the sound blanket (body) and pull it out. Open the sound blanket (inner) and pull it out. Sound blanket (inner) Removal Procedure...
Page 297: Removal Of Electronic Expansion Valve Coil, Four Way Valve Coil And Thermistor
Outdoor Unit SiENBE12-620 Removal of Electronic Expansion Valve Coil, Four Way Valve Coil and Thermistor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step 1. Remove the electronic expansion valve coil Remove the each electronic expansion...
Page 298 SiENBE12-620 Outdoor Unit Procedure Points Step 3. Remove the liquid/gas Meet the edge of the pipe thermistor thermistor and clip. Open the putty and The number of ports is remove the liquid pipe different according to the thermistor. models. [S90] : Outdoor air thermistor Heat exchanger thermistor...
Page 299 Outdoor Unit SiENBE12-620 Procedure Points Step 5. Remove the discharge Meet the edge of the pipe thermistor thermistor and clip. Clip Undo the clip and Be careful not to loose the remove the discharge clip for the discharge pipe pipe thermistor. thermistor.
Page 300: Removal Of The Distributor
SiENBE12-620 Outdoor Unit Removal of the Distributor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the putty. Warning Ventilate when refrigerant leaks during the work. (If refrigerant contacts fire, it will cause to arise toxic gas.) Caution...
Page 301: Removal Of The Four Way Valve
Outdoor Unit SiENBE12-620 Removal of the 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 Cautions for restoration Be sure to apply nitrogen replacement when 1.
Page 302: Removal Of The Compressor
SiENBE12-620 Outdoor Unit Removal of the 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 terminal Make a note. cover Be careful so as not to burn the compressor terminals or Remove the terminal the name plate.
Page 303 Outdoor Unit SiENBE12-620 Procedure Points Step Remove the 2 sheets of Warning putty. Ventilate when refrigerant leaks during the work. (If refrigerant contacts fire, it will cause to arise toxic gas.) There is one nut fixing the compressor. Remove the nut with an open-end spanner.
Page 304: Part 8 Others
SiENBE12-620 Part 8 Others 1. Others ....................296 1.1 Test Run from the remote control............296 1.2 Jumper Settings ...................297 Others...
Page 305: Others
Others SiENBE12-620 1. Others Test Run from the remote control For Heat pump In cooling mode, select the lowest programmable temperature; in heating mode, select the highest programmable temperature. Trial operation may be disabled in either mode depending on the room temperature. After trial operation is complete, set the temperature to a normal level.
Page 306: Jumper Settings
SiENBE12-620 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 infrared remote controls can be set for different addresses. How to set the different addresses Control PCB of the indoor unit (1) Remove the electrical box.
Page 307 Others SiENBE12-620 1.2.3 Adjusting the Angle of the Intelligent Eye Sensor FTK(X)S20-35C, ATXS20-35D, ATXS20-35C Once installation of the indoor unit is complete, adjust the angle of the Intelligent eye sensor to ensure the detection area properly covers the room. (Adjustable angle : 15° to right and left of center) Intelligent-eye senor Gently push and slide the sensor to adjust the angle.
Page 308: Part 9 Appendix
SiENBE12-620 Part 9 Appendix 1. Piping Diagrams..................300 1.1 Indoor Units ..................300 1.2 Outdoor Units ..................306 2. Wiring Diagrams..................308 2.1 Indoor Units ..................308 2.2 Outdoor Units ..................313 Appendix...
Page 309: Piping Diagrams
Piping Diagrams SiENBE12-620 1. Piping Diagrams Indoor Units 1.1.1 Wall Mounted Type FTXG25EV1BW(S), FTXG35EV1BW(S), CTXG50EV1BW(S), ATXG50EV1B ATXG25EV1B, ATXG35EV1B Indoor unit Indoor unit Heat exchanger (7.0Cut) Heat exchanger (7.0Cut) (7.0Cut) (7.0Cut) Thermistor (7.0Cut) (7.0Cut) Thermistor on heat exch. on heat exch. (7.0Cut) (7.0Cut) Cross flow fan...
Page 310 SiENBE12-620 Piping Diagrams FTKS50D2V1W(L) FTXS50D2V1W(L), ATXS50E2V1B Indoor unit Maffler Assy Heat exchanger Indoor unit (7.0Cut) Maffler Assy Heat exchanger (6.4Cut) (7.0Cut) (6.4Cut) Thermistor (6.4Cut) on heat exch. Thermistor (6.4Cut) (6.4Cut) on heat exch. (6.4Cut) Cross flow fan Field piping (6.4Cut) Cross flow fan Field piping (6.4Cut)
Page 311 Piping Diagrams SiENBE12-620 FTK(X)S50EV1B, ATX50EV1B Indoor unit (7.9Cut) Heat exchanger Thermistor on heat exch. Cross flow fan Field piping (6.4Cut) Fan motor Field piping (12.7Cut) (12.7Cut) Refrigerant flow cooling heating 4D040081N 1.1.2 Duct Connected Type FDK(X)S25CAVMB, FDK(X)S35CAVMB, FDK(X)S50CVMB, FDK(X)S25EAVMB, FDK(X)S35EAVMB Indoor unit (6.4Cut) Heat exchanger...
Page 312 SiENBE12-620 Piping Diagrams 1.1.3 Floor / Ceiling Suspended Dual Type FLKS25BAVMB, FLKS35BAVMB FLKS50BAVMB Indoor unit Indoor unit (9.5Cut) (6.4Cut) Heat exchanger Heat exchanger Thermistor on heat Thermistor exch. Field piping Sirocco fan on heat (6.4Cut) exch. Field piping Sirocco fan (6.4Cut) Fan motor Field piping...
Page 313 Piping Diagrams SiENBE12-620 1.1.4 Floor Standing Type FVKS25BAVMB, FVKS35BAVMB FVKS50BAVMB Indoor unit Indoor unit Heat exchanger Muffler 7.0Cut 4.8Cut Heat exchanger 4.8Cut Thermistor Cross flow fan Fan motor Thermistor on heat on heat Cross flow fan Fan motor Muffler exch. exch.
Page 314 SiENBE12-620 Piping Diagrams 1.1.5 Ceiling Suspended Type FHQ35/50BVV1B Indoor heat exchanger φ Field piping C1220T-0 Field piping φ C1220T-0 Outdoor unit Indoor unit Indoor unit MODEL FHQ35BUV1B FHQ35BVV1B FCQ35BVE FHQ50 • 60BUV1B FHQ50 • 60BVV1B 12.7 FCQ50 • 60BVE FBQ60BV1, FBQ60BVL FUQ71, 100, 125BUV1B FUQ71, 100, 125BVV1B FHQ71, 100, 125BUV1B...
Page 315: Outdoor Units
Piping Diagrams SiENBE12-620 Outdoor Units 2MXS52E2(3)V1B, 2AMX52E2(3)V1B OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPARATURE THERMISTOR ( DOA ) ELECTRONIC HEADER EXPANSION VALVE LIQUID PIPE THERMISTOR(DLA) HEADER 9.5CuT 6.4CuT ROOM A ( 6.4 CuT ) FILTER FIELD ELECTRONIC PIPING EXPANSION VALVE LIQUID PIPE (LIQUID THERMISTOR(DLB) 6.4CuT...
Page 316 SiENBE12-620 Piping Diagrams 3MKS50E2(3)V1B OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPARATURE ELECTRONIC THERMISTOR ( DOA ) EXPANSION VALVE HEADER LIQUID PIPE THERMISTOR(DLA) 6.4CuT HEADER 9.5CuT ROOM A ( 6.4 CuT ) FILTER ELECTRONIC EXPANSION VALVE LIQUID PIPE THERMISTOR(DLB) FIELD 6.4CuT ROOM B PIPING ( 6.4 CuT ) FILTER...
Page 317: Wiring Diagrams
Wiring Diagrams SiENBE12-620 2. Wiring Diagrams Indoor Units 2.1.1 Wall Mounted Type FTXG25EV1BW(S), FTXG35EV1BW(S), CTXG50EV1BW(S), ATXG25EV1B, ATXG35EV1B, ATXG50EV1B PCB2 LED4 LED3 LED2 SIGNAL RECEIVE GRN / YLW INFRARED FIELD WIRING. t° REMOTE GRN / YLW CONTROL PCB3 PCB1 TRANSMISSION CIRCUIT outdoor INTELLIGENT- EYE SENSOR...
Page 318 SiENBE12-620 Wiring Diagrams FTK(X)S50D2V1W(L), ATXS50E2V1B FIELD WIRING. PCB1 PCB3 RECTIFIER 3.15A LED1 OUTDOOR LED2 CAUTION LED3 GRN/YLW TRANSMISSION NOTE THAT OPERATION WILL CIRCUIT RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN. t° : FRAME GROUND : FUSE H1P~H3P : PILOT LAMP...
Page 319 Wiring Diagrams SiENBE12-620 FTK(X)S50EV1B, ATX50EV1B FIELD WIRING. PCB3 PCB1 RECTIFIER 3.15A OUTDOOR ° GRN/YLW CAUTION TRANSMISSION NOTE THAT OPERATION WILL CIRCUIT RESTART AUTOMATICALLY IF PCB4 THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN. LED1 LED2 LED3 : FRAME GROUND H2P H3P : FUSE...
Page 320 SiENBE12-620 Wiring Diagrams 2.1.3 Floor / Ceiling Suspended Dual Type FLK(X)S25BAVMB, FLK(X)S35BAVMB, FLK(X)S50BAVMB PCB3 PCB1 PCB2 LED1 LED2 LED3 3.15A → outdoor GRN/YLW FIELD WIRING. PCB4 TRANSMISSION CIRCUIT CAUTION SIGNAL NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF RECEIVER THE MAIN POWER SUPPLY IS indoor indoor TURNED OFF AND THEN BACK...
Page 321 Wiring Diagrams SiENBE12-620 2.1.5 Ceiling Suspended Type FHQ35/50/60BVV1B : CONNECTER DISCRIMINATION COLOUR FOR COMPONENTS. : CONNECTER DISCRIMINATION COLOUR FOR COMPONENTS. : CONNECTER COLOUR FOR COMPONENTS. : CONNECTER COLOUR FOR COMPONENTS. IN CASE OF SIMULTANEOUS IN CASE OF SIMULTANEOUS t° t° : CONNECTER COLOUR FOR PRINTED CIRCUIT BOARD.
Page 322: Outdoor Units
SiENBE12-620 Wiring Diagrams Outdoor Units 2MXS52E2(3)V1B, 2AMX52E2(3)V1B MRM20 3.15A POWER SUPPLY MRM10 6(P) 7(N) TO INDOOR UNIT X11A ROOM B 3.15A ROOM A PCB1 SHEET METAL S101 indoor FIELD WIRING t° t° t° t° t° t° t° 1 S102 PCB2 (OUTDOOR) (DISCHARGE) (ROOM-A) (ROOM-B) (ROOM-A) (ROOM-B)
Page 323 Wiring Diagrams SiENBE12-620 3MKS50E2(3)V1B OWER SUPPLY MRM20 3.15A MRM10 6(P) 7(N) O INDOOR UNIT X11A OOM B 3.15A OOM A PCB1 OOM C S101 SHEET METAL t° t° t° t° t° t° t° t° t° 1 S102 indoor PCB2 R10T (ROOM-A) (ROOM-C) (OUTDOOR) (DISCHARGE) (ROOM-A) (ROOM-C)
Page 324: Index
SiENBE12-620 Index Numerics check No.04 ............253 check No.05 ............254 3 minutes stand-by..........90 check No.06 ............255 check No.07 ............256 check No.08 ............257 A1................213 check No.09 ............257 A5..............214, 223 check No.10 ............258 A6..............216, 217 check No.11 ............258 AC1 .................61 check No.12 ............
Page 325 SiENBE12-620 electronic expansion valve control ......96 freeze-up protection control ....93, 214, 223 error codes frequency control............ 88 A1 ..............213 frequency principle ..........66 A5 ............214, 223 front panel ............265 A6 ............216, 217 front panel control ..........69 C4 ..............219 front panel mechanism ...........
Page 326 SiENBE12-620 J9 ................239 power failure recovery function JA ........42, 44, 46, 49, 51, 53, 56, 297 ........42, 44, 46, 49, 51, 53, 56 JB ........42, 44, 46, 49, 51, 53, 56, 297 power supply PCB..........54, 57 JC........42, 44, 46, 49, 51, 53, 56, 297 power supply waveforms check ......
Page 327 SiENBE12-620 S201................56 SW7 ............... 46 S202................56 S203................56 S204................56 target discharge pipe temperature control ..... 99 S21......42, 44, 46, 49, 51, 53, 56, 61, 271 terminal board ............280 S22..............61, 271 test run from the remote control ......296 S23............56, 61, 271 thermistor S24..............53, 56 discharge pipe thermistor ....
Page 328 SiENBE12-620 X26A ...............59 X27A ...............59 X29A ...............59 X33A ...............59 X35A ...............59 X40A ...............59 X5A .................59 X60A ...............59 X61A ...............59 Index...
Page 329 SiENBE12-620 Drawings & Flow Charts fan motor or related abnormality AC motor............216 anti-icing function in other rooms ......251 DC motor ............217 ARC433A ..............207 four way valve performance check....... 254 automatic air flow control ........70 freeze-up protection control ....93 automatic operation..........72 frequency control............
Page 330 SiENBE12-620 over-voltage detection...........249 PCB.................47 PCB (ceiling suspended type).........60 piping diagrams ceiling suspended type, indoor unit ....305 duct connected type, indoor unit.....302 floor / ceiling suspended dual type, indoor unit ..........303 floor standing type, indoor unit .......304 outdoor unit.............306 wall mounted type, indoor unit ......300 position sensor abnormality ........236 power supply PCB...........54 power supply PCB (25, 35 class) ......57...
Page 331 "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.

Daikin E-Series 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

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Summary of Contents for Daikin E-Series