Page 1 Si12 - 411A C-Series [Applied Models] Inverter Multi : Cooling Only Inverter Multi : Heat Pump...
Page 2 Si12-411A SUPER MULTI NX C-Series Cooling Only Indoor Unit FTKE25BVM FTKE25BVMA FTKS20CVMB(9) FLKS25BVMB FTKE35BVM FTKE35BVMA FTKS25CVMB(9)(8) FLKS35BVMB FTKD50BVM FTKD50BVMA FTKS35CVMB(9)(8) FLKS50BVMB FTKD60BVM FTKD60BVMA FTKS50BVMB FLKS60BVMB FTKD71BVM FTKD71BVMA FTKS60BVMB FVKS25BVMB CDKD25CVM CDKD25CVMA FTKS71BVMB FVKS35BVMB CDKD35CVM CDKD35CVMA CDKS25CVMB FVKS50BVMB CDKD50CVM CDKD50CVMA CDKS35CVMB...
Page 3: Table Of Contents
Si12-411A 1. Introduction ................... vii 1.1 Safety Cautions ..................vii Part 1 List of Functions ..............1 1. List of Functions ..................2 1.1 Cooling Only Models ................2 1.2 Heat Pump Models...................8 Part 2 Specifications ..............17 1. Specifications ..................18 1.1 Indoor Units - Cooling Only ..............18 1.2 Outdoor Units - Cooling Only ..............30 1.3 Indoor Units - Heat Pump...............36 1.4 Outdoor Units - Heat Pump ..............51...
Page 4 Si12-411A 3.10 Defrost Control ..................97 3.11 Low Hz High Pressure Limit ..............98 3.12 Electronic Expansion Valve Control ............98 3.13 Malfunctions ..................103 3.14 Forced Operation Mode ...............104 3.15 Wiring-Error Check................105 3.16 Additional Function................107 Part 5 System Configuration............. 109 1. System Configuration................110 1.1 Operation Instructions ................110 2.
Page 5 Si12-411A 5.16 Discharge Pipe Temperature Control...........190 5.17 Position Sensor Abnormality ..............191 5.18 CT or Related Abnormality ..............192 5.19 Thermistor or Related Abnormality (Outdoor Unit).......194 5.20 Electrical Box Temperature Rise............196 5.21 Radiation Fin Temperature Rise ............198 5.22 Output Over Current Detection.............200 5.23 Insufficient Gas..................202 5.24 Low-voltage Detection................204 5.25 Anti-icing Function in Other Rooms / Unspecified Voltage...
Page 6 Si12-411A Index ..................... i Drawings & Flow Charts ..............v Table of Contents...
Page 7 Si12-411A Table of Contents...
Page 8: Introduction
Si12-411A Introduction 1. Introduction Safety Cautions Cautions and Be sure to read the following safety cautions before conducting repair work. The caution items are classified into “ Warning” and “ Caution”. The “ Warning” Warnings items are especially important since they can lead to death or serious injury if they are not followed closely.
Page 9 Introduction Si12-411A 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 10 Si12-411A 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 11 Introduction Si12-411A 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 12: Part 1 List Of Functions
Si12-411A Part 1 List of Functions 1. List of Functions ..................2 1.1 Cooling Only Models ................2 1.2 Heat Pump Models...................8 List of Functions...
Page 13: List Of Functions
List of Functions Si12-411A 1. List of Functions Cooling Only Models 1.1.1 R22 Series Category Functions Category Functions Basic Health & Air Purifying Filter with Bacteriostatic & Inverter (with Inverter Power Control) — — Function Clean Virustatic Functions Operation Limit for Cooling (°CDB) —...
Page 14 Si12-411A List of Functions Category Functions Category Functions Basic Health & Air Purifying Filter with Bacteriostatic & Inverter (with Inverter Power Control) — Function Clean Virustatic Functions Operation Limit for Cooling (°CDB) — Photocatalytic Deodorizing Filter — Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
Page 15 List of Functions Si12-411A Category Functions Category Functions Basic Health & Air Purifying Filter with Bacteriostatic & Inverter (with Inverter Power Control) — — Function Clean Virustatic Functions Operation Limit for Cooling (°CDB) — — — Photocatalytic Deodorizing Filter — —...
Page 16 Si12-411A List of Functions Category Functions Category Functions Basic Health & Air Purifying Filter with Bacteriostatic & Inverter (with Inverter Power Control) — Function Clean Virustatic Functions Operation Limit for Cooling (°CDB) Photocatalytic Deodorizing Filter — Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
Page 17 List of Functions Si12-411A 1.1.2 R410A Series Category Functions Category Functions Basic Health & Air Purifying Filter with Bacteriostatic & Inverter (with Inverter Power Control) — — — Function Clean Virustatic Functions Operation Limit for Cooling (°CDB) — — — Photocatalytic Deodorizing Filter —...
Page 18 Si12-411A List of Functions Category Functions Category Functions Basic Health & Air Purifying Filter with Bacteriostatic Inverter (with Inverter Power Control) — Function Clean & Virustatic Functions –10 Operation Limit for Cooling (°CDB) — — Photocatalytic Deodorizing Filter — Air Purifying Filter with Operation Limit for Heating (°CWB) —...
Page 19: Heat Pump Models
List of Functions Si12-411A Heat Pump Models 1.2.1 R22 Series Category Functions Category Functions Basic Health & Air Purifying Filter with Bacteriostatic & Inverter (with Inverter Power Control) — — Function Clean Virustatic Functions Operation Limit for Cooling (°CDB) — —...
Page 20 Si12-411A List of Functions Category Functions Category Functions Basic Health & Air Purifying Filter with Bacteriostatic & Inverter (with Inverter Power Control) — Function Clean Virustatic Functions –10 Operation Limit for Cooling (°CDB) — Photocatalytic Deodorizing Filter — –15 Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
Page 21 List of Functions Si12-411A 1.2.2 R410A Series Category Functions Category Functions Basic Health & Air Purifying Filter with Bacteriostatic & Inverter (with Inverter Power Control) — — — Function Clean Virustatic Functions Operation Limit for Cooling (°CDB) — — — Photocatalytic Deodorizing Filter —...
Page 22 Si12-411A List of Functions Category Functions Category Functions Basic Health & Air Purifying Filter with Inverter (with Inverter Power Function Clean Bacteriostatic & Virustatic — Control) Functions –10 Operation Limit for Cooling — — Photocatalytic Deodorizing Filter — (°CDB) –15 Air Purifying Filter with Operation Limit for Heating —...
Page 23 List of Functions Si12-411A Category Functions Category Functions Basic Health & Air Purifying Filter with Bacteriostatic & Inverter (with Inverter Power Control) — Function Clean Virustatic Functions Operation Limit for Cooling (°CDB) — Photocatalytic Deodorizing Filter — Air Purifying Filter with Photocatalytic Operation Limit for Heating (°CWB) —...
Page 24 Si12-411A List of Functions Category Functions Category Functions Inverter (with Inverter Power Control) Air Purifying Filter with Bacteriostatic, — — — –10~ Virustatic Functions Operation Limit for Cooling (°CDB) Basic –15~ Function Operation Limit for Heating (°CWB) — Photocatalytic Deodorizing Filter —...
Page 25 List of Functions Si12-411A Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter with Bacteriostatic & — — Function Clean Virustatic Functions Operation Limit for Cooling (°CDB) — — — Photocatalytic Deodorizing Filter — —...
Page 26 Si12-411A List of Functions Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter with Bacteriostatic & Function Clean Virustatic Functions Operation Limit for Cooling (°CDB) — — Photocatalytic Deodorizing Filter Operation Limit for Heating (°CWB) Air Purifying Filter with Photocatalytic —...
Page 27 List of Functions Si12-411A Category Functions Category Functions Basic Inverter (with Inverter Power Control) Health & Air Purifying Filter with Bacteriostatic & — — Function Clean Virustatic Functions Operation Limit for Cooling (°CDB) –10 –10 Photocatalytic Deodorizing Filter — — Operation Limit for Heating (°CWB) –15 –15...
Page 28 Si12-411A Part 2 Specifications 1. Specifications ..................18 1.1 Indoor Units - Cooling Only ..............18 1.2 Outdoor Units - Cooling Only ..............30 1.3 Indoor Units - Heat Pump...............36 1.4 Outdoor Units - Heat Pump ..............51 Specifications...
Page 29: Part 2 Specifications
Specifications Si12-411A 1. Specifications Indoor Units - Cooling Only Wall Mounted Type 50Hz 220-230-240V / 60Hz 220-230V Model FTKE25BVM FTKE35BVM Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color White White 7.8 (275) 7.7 (272) 6.4 (226) 6.3 (222) m³/min...
Page 30 Si12-411A Specifications 50Hz 220-230-240V / 60Hz 220-230V Model FTKD71BVM Rated Capacity 7.1kW Class Front Panel Color White 18.0 (635) 15.1 (533) m³/min Air Flow Rates (cfm) 12.7 (448) 11.3 (399) Type Cross Flow Fan Motor Output Speed Steps 5 Steps, Silent, Auto Air Direction Control Right, Left, Horizontal, Downward Air Filter...
Page 31 Specifications Si12-411A 50Hz 220-230-240V / 60Hz 220-230V Model FTKE25BVMA FTKE35BVMA Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color White White 7.8 (275) 7.7 (272) 6.4 (226) 6.3 (222) m³/min Air Flow Rates (cfm) 5.0 (177) 4.9 (173) 4.3 (152) 4.4 (155) Type Cross Flow Fan...
Page 32 Si12-411A Specifications 50Hz 220-230-240V / 60Hz 220-230V Model FTKD71BVMA Rated Capacity 7.1kW Class Front Panel Color White 18.3 (646) 15.3 (540) m³/min Air Flow Rates (cfm) 12.7 (448) 11.3 (399) Type Cross Flow Fan Motor Output Speed Steps 5 Steps, Silent, Auto Air Direction Control Right, Left, Horizontal, Downward Air Filter...
Page 33 Specifications Si12-411A 50Hz, 230V Model FTKS20CVMB(9) FTKS25CVMB(9)(8) 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) m³/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 34 Si12-411A Specifications 50Hz, 230V Model FTKS60BVMB FTKS71BVMB Rated Capacity 6.0kW Class 7.1kW Class Front Panel Color White White 16.2 (572) 16.7 (590) 13.6 (480) 14.2 (501) m³/min Air Flow Rates (cfm) 11.4 (402) 11.6 (409) 10.2 (360) 10.6 (374) Type Cross Flow Fan Cross Flow Fan Motor Output...
Page 35 Specifications Si12-411A Duct Connected Type 50Hz 220-230-240V / 60Hz 220-230V Model CDKD25CVM CDKD35CVM Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color — — 9.5 (335) 10.0 (353) 8.8 (311) 9.3 (328) m³/min Air Flow Rates (cfm) 8.0 (282) 8.5 (300) 6.7 (237) 7.0 (247) Type...
Page 36 Si12-411A Specifications 50Hz 220-230-240V / 60Hz 220-230V Model CDKD25CVMA CDKD35CVMA Rated Capacity 2.5kW Class 3.5kW Class — — Front Panel Color 9.5 (335) 10.0 (353) 8.8 (311) 9.3 (328) m³/min Air Flow Rates (cfm) 8.0 (282) 8.5 (300) 6.7 (237) 7.0 (247) Type Sirocco Fan...
Page 37 Specifications Si12-411A 50Hz, 230V Model CDKS25CVMB CDKS35CVMB Rated Capacity 2.5kW Class 3.5kW Class — — Front Panel Color 9.5 (335) 10.0 (353) 8.8 (311) 9.3 (328) m³/min Air Flow Rates (cfm) 8.0 (282) 8.5 (300) 6.7 (237) 7.0 (247) Type Sirocco Fan Sirocco Fan Motor Output...
Page 38 Si12-411A Specifications Floor / Ceiling Suspended Dual Type 50Hz 220-230-240V / 60Hz 220-230V Model FLK25AVMA FLK35AVMA Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color Almond White Almond White 7.6 (268) 8.7 (307) 6.8 (240) 7.7 (272) m³/min Air Flow Rates (cfm) 6.0 (212) 6.6 (233)
Page 39 Specifications Si12-411A 50Hz, 230V Model FLKS25BVMB FLKS35BVMB 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) m³/min Air Flow Rates (cfm) 6.0 (212) 6.6 (233) 5.2 (184) 5.6 (198) Type Sirocco Fan Sirocco Fan...
Page 40 Si12-411A Specifications Floor Standing Type 50Hz, 230V Model FVKS25BVMB FVKS35BVMB 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) m³/min Air Flow Rates (cfm) 4.3 (152) 4.3 (152) 3.4 (120) 3.4 (120) Type...
Page 41: Outdoor Units - Cooling Only
Specifications Si12-411A Outdoor Units - Cooling Only 50Hz 220-230-240V / 60Hz 220-230V Model 2MKD58BVM 3MKD58BVM Cooling Capacity — — — — Power Consumption — — Running Current Casing Color Ivory White Ivory White Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC32WXD...
Page 42 Si12-411A Specifications 50Hz 220-230-240V / 60Hz 220-230V Model 3MKD75BVM 4MKD75BVM Cooling Capacity — — — — Power Consumption — — Running Current Casing Color Ivory White Ivory White Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC45ZXD 2YC45ZXD Motor Output 1,380...
Page 43 Specifications Si12-411A 50Hz 220-230-240V / 60Hz 220-230V Model 4MKD90BVM Cooling Capacity — — Power Consumption — Running Current Casing Color Pale Ivory Type Hermetically Sealed Swing Type Compressor Model 2YC45ZXD Motor Output 1,380 Model SUNISO 4GSD.I. Refrigerant Oil Charge 0.75 Type Refrigerant Charge...
Page 44 Si12-411A Specifications 50Hz 220-230-240V / 60Hz 220-230V Model 3MKD75BVMA 4MKD90BVMA — — Cooling Capacity — — Power Consumption — — Running Current Casing Color Ivory White Pale Ivory Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC45ZXD 2YC45ZXD Motor Output 1,380...
Page 45 Specifications Si12-411A 50Hz, 230V Model 3MKS50BVMB(8) 4MKS58BVMB(8) Cooling Capacity — — — — Power Consumption — — Running Current Casing Color Ivory White Ivory White Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC32HXD 2YC32HXD Motor Output Model FVC50K FVC50K...
Page 46 Si12-411A Specifications 50Hz, 230V Model 4MKS75BVMB 4MKS90BVMB Cooling Capacity — — — — Power Consumption — — Running Current Casing Color Ivory White Pale Ivory Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC45BXD 2YC45BXD Motor Output 1,380 1,380 Model...
Page 47: Indoor Units - Heat Pump
Specifications Si12-411A Indoor Units - Heat Pump Wall Mounted Type 50Hz 220-230-240V / 60Hz 220-230V FTXE25BVMA FTXE35BVMA Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color White White 7.8 (275) 8.1 (286) 7.7 (272) 8.1 (286) 6.4 (226) 6.6 (233) 6.3 (222)
Page 48 Si12-411A Specifications 50Hz 220-230-240V / 60Hz 220-230V FTXD71BVMA Model Cooling Heating Rated Capacity 7.1kW Class Front Panel Color White 18.3 (646) 19.8 (699) 15.3 (540) 17.1 (604) m³/min Air Flow Rates (cfm) 12.7 (448) 14.4 (508) 11.3 (399) 12.6 (445) Type Cross Flow Fan Motor Output...
Page 49 Specifications Si12-411A 50Hz 230V FTXS20CVMB(9) FTXS25CVMB(9)(8) Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 2.5kW Class Front Panel Color White White 7.7 (272) 7.8 (275) 7.7 (272) 7.8 (275) 5.9 (208) 6.5 (230) 5.9 (208) 6.5 (230) m³/min Air Flow Rates (cfm) 4.2 (148) 5.3 (187)
Page 50 Si12-411A Specifications 50Hz 230V FTXS60BVMB FTXS71BVMB Model Cooling Heating Cooling Heating Rated Capacity 6.0kW Class 7.1kW Class Front Panel Color White White 16.2 (572) 17.4 (614) 16.7 (590) 18.5 (653) 13.6 (480) 15.1 (533) 14.2 (501) 15.1 (533) m³/min Air Flow Rates (cfm) 11.4 (402) 12.7 (448)
Page 51 Specifications Si12-411A 230V, 50Hz ATXS20CVMB(9) ATXS25CVMB(9) Model Cooling Heating Cooling Heating Rated Capacity 2.0kW Class 2.5kW Class Front Panel Color White White 7.7 (272) 7.8 (275) 7.7 (272) 7.8 (275) 5.9 (208) 6.5 (230) 5.9 (208) 6.5 (230) m³/min Air Flow Rates (cfm) 4.2 (148) 5.3 (187)
Page 52 Si12-411A Specifications 50Hz 230V FTXS25BVMA FTXS35BVMA Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color White White 7.4 (261) 7.5 (265) 7.4 (261) 7.5 (265) 5.8 (205) 6.3 (222) 5.9 (208) 6.3 (222) m³/min Air Flow Rates (cfm) 4.1 (145) 5.0 (177)
Page 53 Specifications Si12-411A 50Hz 230V FTXS71BVMA(8) Model Cooling Heating Rated Capacity 7.1kW Class Front Panel Color White 16.8 (592) 18.7 (660) 14.2 (501) 16.1 (567) m³/min Air Flow Rates (cfm) 11.9 (420) 13.6 (481) 11.2 (394) 12.5 (441) Type Cross Flow Fan Motor Output Speed Steps...
Page 54 Si12-411A Specifications Duct Connected Type 50Hz 220-230-240V / 60Hz 220-230V CDXD25CVMA CDXD35CVMA 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) m³/min...
Page 55 Specifications Si12-411A 50Hz 230V CDXS25CVMB CDXS35CVMB 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) m³/min Air Flow Rates (cfm) 8.0 (282) 8.0 (282)
Page 56 Si12-411A Specifications 50Hz 230V CDXS25CVMA CDXS35CVMA 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) m³/min Air Flow Rates (cfm) 8.0 (282) 8.0 (282)
Page 57 Specifications Si12-411A Floor / Ceiling Suspended Dual Type 50Hz 220-230-240V / 60Hz 220-230V FLX25AVMA FLX35AVMA 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) 8.7 (307) 10.0 (353) 6.8 (240) 8.3 (293) 7.7 (272)
Page 58 Si12-411A Specifications 50Hz 230V FLXS25BVMB FLXS35BVMB 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) m³/min Air Flow Rates (cfm)
Page 59 Specifications Si12-411A 50Hz 230V FLXS25BVMA FLXS35BVMA 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) m³/min Air Flow Rates (cfm)
Page 60 Si12-411A Specifications Floor Standing Type 50Hz 230V FVXS25BVMB FVXS35BVMB Model Cooling Heating Cooling Heating Rated Capacity 2.5kW Class 3.5kW Class Front Panel Color Almond White Almond White 8.1 (286) 9.2 (325) 8.3 (293) 9.2 (325) 6.2 (219) 7.0 (247) 6.3 (222) 7.1 (251) m³/min Air Flow Rates...
Page 61 Specifications Si12-411A 50Hz 230V FVXS35BVMA FVXS50BVMA Model Cooling Heating Cooling Heating Rated Capacity 3.5kW Class 5.0kW Class Front Panel Color Almond White Almond White 8.3 (293) 9.2 (325) 10.8 (381) 13.2 (466) 6.3 (222) 7.1 (251) 9.2 (325) 11.3 (399) m³/min Air Flow Rates (cfm)
Page 62: Outdoor Units - Heat Pump
Si12-411A Specifications Outdoor Units - Heat Pump 50Hz 220-240V / 60Hz 220-230V 3MXD68BVMA 4MXD80BVMA Model Cooling Heating Cooling Heating — — Cooling Capacity — — Power Consumption — — Running Current Casing Color Ivory White Pale Ivory Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model...
Page 63 Specifications Si12-411A 50Hz 230V 3MXS52BVMB(8) 4MXS68BVMB9 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 2YC32HXD 2YC45BXD Motor Output...
Page 64 Si12-411A Specifications 50Hz 230V 4MXS80BVMB9 Model Cooling Heating — Cooling Capacity — Power Consumption — Running Current Casing Color Pale Ivory Type Hermetically Sealed Swing Type Compressor Model 2YC45BXD Motor Output 1,380 Model FVC50K Refrigerant Oil Charge 0.75 Type R410A Refrigerant Charge 48.5...
Page 65 Specifications Si12-411A 230V, 50Hz 3AMXS52BVMB Model Cooling Heating — Cooling Capacity — Power Consumption — Running Current Casing Color Ivory White Type Hermetically Sealed Swing Type Compressor Model 2YC32HXD Motor Output Model FVC50K Refrigerant Charge 0.65 Type R410A Refrigerant Charge —...
Page 66 Si12-411A Specifications 50Hz 230V 4MXS68CVMA 4MXS80CVMA Model Cooling Heating Cooling Heating — — Cooling Capacity — — Power Consumption — — Running Current Casing Color Ivory White Pale Ivory Type Hermetically Sealed Swing Type Hermetically Sealed Swing Type Compressor Model 2YC45BXD 2YC45BXD Motor Output...
Page 67 Specifications Si12-411A Specifications...
Page 68: Part 3 Printed Circuit Board Connector Wiring Diagram
Si12-411A Part 3 Printed Circuit Board Connector Wiring Diagram 1. Printed Circuit Board Connector Wiring Diagram........58 1.1 Wall Mounted Type 20/25/35 Class ............58 1.2 Wall Mounted Type 50/60/71 Class ............61 1.3 Duct Connected Type................63 1.4 Floor / Ceiling Suspended Dual Type.............64 1.5 Floor Standing Type ................66 1.6 Outdoor Units ..................69 Printed Circuit Board Connector Wiring Diagram...
Page 69: Printed Circuit Board Connector Wiring Diagram
Si12-411A Printed Circuit Board Connector Wiring Diagram Printed Circuit Board Connector Wiring Diagram Wall Mounted Type 20/25/35 Class Connectors Connector for fan motor Connector for swing motor (Horizontal Flap) Connector for fan motor Connector for centralized control to 5 rooms Connector for signal receiver PCB Connector for control PCB Connector for heat exchanger thermistor...
Page 70 Si12-411A 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 71 Si12-411A Printed Circuit Board Connector Wiring Diagram PCB Detail Printed Circuit Board Connector Wiring Diagram...
Page 72: Wall Mounted Type 50/60/71 Class
Si12-411A Printed Circuit Board Connector Wiring Diagram Wall Mounted Type 50/60/71 Class Connectors Connector for fan motor Connector for swing motor (horizontal blades) Connector for swing motor (vertical blades) Connector for centralized control (HA) 5) S26, Connector for buzzer PCB 6) S27, S29, Connector for control PCB Connector for signal receiver PCB...
Page 73 Si12-411A Printed Circuit Board Connector Wiring Diagram PCB Detail PCB(1): Control PCB (indoor unit) LED A (R2860) 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 74: Duct Connected Type
Si12-411A Printed Circuit Board Connector Wiring Diagram Duct Connected Type Connectors (on PCB 1) Connector for fan motor 2) S1 (on PCB 2) Connector for control PCB Connector for fan motor Connector for centralized control to 5 rooms Connector for display PCB Connector for room temp / Heat exchanger thermistor Note: Other designations...
Page 75: Floor / Ceiling Suspended Dual Type
Si12-411A Printed Circuit Board Connector Wiring Diagram Floor / Ceiling Suspended Dual Type Connectors Connector for swing motor (horizontal swing) Connector for fan motor Connector for centralized control Connector for display PCB 5) S25, S27, Connector for control PCB Connector for signal receiver PCB Connector for room temperature thermistor Connector for heat exchanger thermistor Connector for power supply PCB...
Page 76 Si12-411A Printed Circuit Board Connector Wiring Diagram Power Supply PCB (PCB 2) Display PCB (PCB 3) Signal Receiver PCB (PCB 4) Printed Circuit Board Connector Wiring Diagram...
Page 77: Floor Standing Type
Si12-411A Printed Circuit Board Connector Wiring Diagram Floor Standing Type Connectors Connector for swing motor and lower air outlet motor Connector for centralized control Connector for signal receiver 4) S31, Connector for room temperature / heat exchanger thermistor 5) S201, S203, Connector for power supply PCB (1) S7, S24, 6) S202, S204,...
Page 78 Si12-411A Printed Circuit Board Connector Wiring Diagram Power Supply PCB (PCB 1) Printed Circuit Board Connector Wiring Diagram...
Page 79 Si12-411A Printed Circuit Board Connector Wiring Diagram Control PCB (PCB 2) Display PCB (PCB 3) Signal Receiver PCB (PCB 4) Printed Circuit Board Connector Wiring Diagram...
Page 80: Outdoor Units
Si12-411A Printed Circuit Board Connector Wiring Diagram Outdoor Units Connectors Connector for electronic expansion valve coil A port Connector for electronic expansion valve coil B port Connector for electronic expansion valve coil C port Connector for electronic expansion valve coil D port Connector for CN14 Connector for CN11 Connector for S34...
Page 81 Si12-411A Printed Circuit Board Connector Wiring Diagram Printed Circuit Board Connector Wiring Diagram...
Page 82: Part 4 Function And Control
Si12-411A Part 4 Function and Control 1. Main Functions..................72 1.1 Frequency Principle................72 1.2 Power-Airflow Dual Flaps, Wide Angle Louvers and Auto-Swing ..74 1.3 Fan Speed Control for Indoor Units............75 1.4 Programme Dry Function ...............76 1.5 Automatic Operation................77 1.6 Night Set Mode..................78 1.7 Intelligent Eye..................79 1.8 Home Leave Operation ................81 1.9 Inverter Powerful Operation ..............82...
Page 83: Main Functions
Main Functions Si12-411A 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 the following 2 parameters coming from the operating indoor unit: Parameters The load condition of the operating indoor unit The difference between the room temperature and the set temperature...
Page 84 Si12-411A 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 85: Power-Airflow Dual Flaps, Wide Angle Louvers And Auto-Swing
Main Functions Si12-411A 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 control area in cooling, heating and dry mode. Dual Flaps Heating Mode During heating mode, the large flap enables direct warm air straight downwards.
Page 86: Fan Speed Control For Indoor Units
Si12-411A Main Functions 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 174.
Page 87: Programme Dry Function
Main Functions Si12-411A 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 88: Automatic Operation
Si12-411A Main Functions Automatic Operation Automatic Cooling / Heating Function (Heat Pump Only) When the AUTO mode is selected with the remote controller, 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 89: Night Set Mode
Main Functions Si12-411A 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 90: Intelligent Eye
Si12-411A Main Functions Intelligent Eye This is the function that detects existence of humans in the room by a human motion sensor (Intelligent Eye) and reduces the capacity when there is no human in the room in order to save electricity.
Page 91 Main Functions Si12-411A 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 92: Home Leave Operation
Si12-411A Main Functions 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 93: Inverter Powerful Operation
Main Functions Si12-411A 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 temperature will be converted to the following states in a period of twenty minutes.
Page 94: Other Functions
Si12-411A Main Functions 1.10 Other Functions 1.10.1 Hot Start Function Heat Pump Only In order to prevent the cold air blast that normally comes when heating is started, the temperature of the heat exchanger of the indoor unit is detected, and either the air flow is stopped or is made very weak thereby carrying out comfortable heating of the room.
Page 95 Main Functions Si12-411A 1.10.8 Self-Diagnosis Digital Display The microcomputer continuously monitors main operating conditions of the indoor unit, outdoor unit and the entire system. When an abnormality occur, the LCD remote controller displays error code. These indications allow prompt maintenance operations. 1.10.9 Auto-restart Function Even if a power failure (including one for just a moment) occurs during the operation, the...
Page 96: Function Of Main Structural Parts
Si12-411A Function of Main Structural Parts 2. Function of Main Structural Parts Main Structural Parts 1. Compressor A Swing compressor, being operated by INV control. Heat Pump Model Expansion valve Receiver Solenoid valve Four-way valve (R2433) Compressor Cooling Only Model Expansion valve Compressor (R2434)
Page 97: Function Of Thermistor
Function of Main Structural Parts Si12-411A Function of Thermistor 2.2.1 Heat Pump Model Expansion valve Receiver Solenoid valve Four-way valve Compressor (R2435) A Outdoor Heat 1. An outdoor heat exchanger thermistor is used for controlling a target discharge temperature. Set a target discharge temperature depending on an outdoor and indoor heat exchanger Exchanger temperature.
Page 98 Si12-411A Function of Main Structural Parts D Indoor Heat 1. An indoor heat exchanger thermistor is used for controlling target discharge pipe temperature. Exchanger Set a target discharge pipe temperature according to the outdoor and indoor heat exchanger Thermistor (DCN) temperature.
Page 99 Function of Main Structural Parts Si12-411A 2.2.2 Cooling Only Model Expansion valve Compressor (R2436) A Outdoor Heat 1. An outdoor heat exchanger thermistor is used for controlling a target discharge temperature. Exchanger Set a target discharge temperature depending on an outdoor and indoor heat exchanger temperature.
Page 100 Si12-411A Function of Main Structural Parts D Indoor Heat 1. An indoor heat exchanger thermistor is used for controlling target discharge pipe temperature. Exchanger Set a target discharge pipe temperature according to the outdoor and indoor heat exchanger Thermistor (DCN) temperature.
Page 101: Control Specification
Control Specification Si12-411A 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 Air Conditioner’s Control Mode 1. For heat pump model There are following modes;...
Page 102: Frequency Control
Si12-411A Control Specification 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 controller. The function is explained as follows. 1.
Page 103 Control Specification Si12-411A 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 104: Controls At Mode Changing / Start-Up
Si12-411A Control Specification 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. Detail Preheating ON Condition When outdoor air temperature is below 10.5°C and discharge pipe temperature is below 10.5°C, inverter in open phase operation starts.
Page 105: Discharge Pipe Control
Control Specification Si12-411A 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 Divide the Zone Management within the Zone...
Page 106: Freeze-Up Protection Control
Si12-411A 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. (The signal from the indoor unit must be divided into the zones as the followings. Detail Conditions for Start Controlling Judge the controlling start with the indoor heat exchanger temperature after 2 sec from...
Page 107: Fan Control
Control Specification Si12-411A Fan Control Outline Fan control is carried out according to the following priority. 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 108: Defrost Control
Si12-411A Control Specification 3.10 Defrost Control Outline Heat Pump Only Defrosting is carried out by the cooling cycle (reverse cycle). The defrosting time or outdoor heat exchanger temperature must be more than its fixed value when finishing. Detail Conditions for Starting Defrost The starting conditions must be made with the outdoor air temperature and heat exchanger temperature.
Page 109: Low Hz High Pressure Limit
Control Specification Si12-411A 3.11 Low Hz High Pressure Limit Outline Heat Pump Only Set the upper limit of high pressure in a low Hz zone. Set the upper limit of the indoor heat exchanger temperature by its operating frequency of Hz. Separate into three zones, reset zone, unchanged zone and drooping zone and the frequency control must be carried out in such zones.
Page 110 Si12-411A 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 111 Control Specification Si12-411A 3.12.1 Fully Closing with Power ON Initialize the electronic expansion valve when turning on the power, set the opening position and develop pressure equalizing. 3.12.2 Pressure Equalization Control When the compressor is stopped, open and close the electronic expansion valve and develop pressure equalization.
Page 112 Si12-411A Control Specification 3.12.8 Target Discharge Pipe Temperature Control Obtain the target discharge pipe temperature from the indoor and outdoor heat exchange temperature, and adjust the electronic expansion valve opening so that the actual discharge pipe temperature become close to that temperature. (Indirect SH control using the discharge pipe temperature) Determine a correction value of the electronic expansion valve compensation and drive it according to the deflection of the target discharge temperature and actual discharge...
Page 113 Control Specification Si12-411A 3.12.11Control when frequency is changed When the target pipe temperature control is active, if the target frequency is changed for a specified value in a certain time period, cancel the target discharge pipe temperature control and change the opening of the target electronic expansion valve according to the shift. Function and Control...
Page 114: Malfunctions
Si12-411A Control Specification 3.13 Malfunctions 3.13.1 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 115: Forced Operation Mode
Control Specification Si12-411A Detail Judgment by Input Current When an output frequency is exceeds 55 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 116: Wiring-Error Check
Si12-411A Control Specification 3.15 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 117 Control Specification Si12-411A Checking the Those data can be checked by looking at the service monitor LED indicators, when the wiring error checking is over, during forced operation, at the stop of the system. current setting The LED indicators stop flashing when the forced operation is over. data on the LED1…Room A wiring, LED2…Room B wiring microcomputer...
Page 118: Additional Function
Si12-411A Control Specification 3.16 Additional Function 3.16.1 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. 3.16.2 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 119 Control Specification Si12-411A 3.16.5 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 120: Part 5 System Configuration
Si12-411A Part 5 System Configuration 1. System Configuration................110 1.1 Operation Instructions ................110 2. Instruction....................111 2.1 Contents and Reference Page .............111 2.2 Safety Precautions ................112 2.3 Names of Parts..................114 2.4 Preparation before Operation...............126 2.5 AUTO · DRY · COOL · HEAT · FAN Operation ........129 2.6 Adjusting the Air Flow Direction ............131 2.7 POWERFUL Operation ................137 2.8 OUTDOOR UNIT SILENT Operation ...........138...
Page 121: System Configuration
System Configuration Si12-411A 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 122: Instruction
Si12-411A Instruction 2. Instruction Note: This instruction is appropriate for R22 models. Contents and Reference Page Floor/Ceiling Wall Mounted Type Duct Connected Type Suspended Dual Type Model Series FTKE25/35BVM(A) FTKD50/60/71BVM(A) CDKD25~60CVM(A) FLK25~60AVMA FTXE25/35BVMA FTXD50/60/71BVMA CDXD25~60CVMA FLX25~60AVMA Read before Operation Safety Precautions Names of Parts Preparation before Operation Operation...
Page 123: 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 124 Si12-411A Instruction • Do not stand or sit on the outdoor unit. Do not place any object on the unit to avoid injury, do not remove the fan guard. • Do not place anything under the indoor or outdoor unit that must be kept away from moisture. In certain conditions, moisture in the air may condense and drip.
Page 125: Names Of Parts
Instruction Si12-411A Names of Parts FTK(X)E 25/35 B Names of parts ■ Indoor Unit System Configuration...
Page 126 Si12-411A Instruction ■ Outdoor Unit ■ ■ ■ ■ Indoor Unit 1. Air filter 12. Indoor Unit ON/OFF switch: • Push this switch once to start operation. 2. Photocatalytic deodorizing filter or Push once again to stop it. Air purifying filter: •...
Page 127 Instruction Si12-411A ■ Remote Controller HOME LEAVE ON/OFF TEMP POWERFUL MODE SWING SILENT SENSOR CANCEL TIMER < > ARC433A1, A2 1. Signal transmitter: (AUTO/DRY/COOL/HEAT/FAN) • It sends signals to the indoor unit. 8. SILENT button: for OUTDOOR UNIT 2. Display: SILENT operation •...
Page 128 Si12-411A Instruction FTK(X)D 50/60/71 B Names of parts ■ Indoor Unit ■ Main unit control panel System Configuration...
Page 129 Instruction Si12-411A Outdoor Unit Indoor Unit 1. Air filter 13. HOME LEAVE lamp (red): 2Lights up when you use HOME LEAVE 2. Photocatalytic deodorizing filter or Operation. Air purifying filter: 2These filters are attached to the inside of the air 14.
Page 130 Si12-411A Instruction ■ Remote Controller HOME LEAVE ON/OFF TEMP POWERFUL MODE SILENT SENSOR SWING CANCEL TIMER < > ARC433A21, A22 1. Signal transmitter: 8. SILENT button: for OUTDOOR UNIT • It sends signals to the indoor unit. SILENT operation 2. Display: 9.
Page 131 Instruction Si12-411A CDK(X)D 25/35/50/60 C Names of parts Indoor Unit System Configuration...
Page 132 Si12-411A Instruction ■ Outdoor Unit ■ ■ ■ ■ Indoor Unit 1. Air outlet 10. Indoor Unit ON/OFF switch • Push this switch once to start operation. 2. Air outlet grille (Field supply) Push once again to stop it. • Appearance of the Air outlet grille and Air inlet •...
Page 133 Instruction Si12-411A ■ Remote Controller HOME LEAVE ON/OFF TEMP POWERFUL MODE SILENT CANCEL TIMER < > ARC433A7, A8 1. Signal transmitter: 7. MODE selector button: • It sends signals to the indoor unit. • It selects the operation mode. (AUTO/DRY/COOL/HEAT/FAN) 2.
Page 134 Si12-411A Instruction FLK(X) 25/35/50/60 A Names of parts ■ 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.) CAUTION •...
Page 135 Instruction Si12-411A Outdoor Unit Indoor Unit 1. Louvres (vertical blades) 13. Indoor unit ON/OFF switch The louvres are inside of the air outlet. 2 Push this switch once to start operation. 2. Air outlet Push once again to stop it. 2 Push the switch using an object with a sharp 3.
Page 136 Si12-411A Instruction ■ Remote Controller 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. (AUTO/DRY/COOL/HEAT/FAN) 2.
Page 137: Preparation Before Operation
Instruction Si12-411A Preparation before Operation Preparation Before Operation ■ To set the batteries Position + and – correctly! 1. Press with a finger and slide the front cover to take it off. 2. Set two dry batteries (AAA). 3. Set the front cover as before. ATTENTION ■...
Page 138 Si12-411A Instruction Preparation Before Operation ■ To operate the remote controller • To use the remote controller, aim the transmitter at the indoor unit. If there is anything to block signals between the unit and the remote control- ler, such as a curtain, the unit will not operate. •...
Page 139 Instruction Si12-411A ■ To set the clock 1. Press “CLOCK button”. is displayed. blinks. 2. Press “TIMER setting button” to set the clock to the present time. HOME LEAVE ON/OFF Holding down “ ” or “ ” button rap- TEMP POWERFUL idly increases or decreases the time dis- play.
Page 140: Auto · Dry · Cool · Heat · Fan Operation
Si12-411A Instruction AUTO · DRY · COOL · HEAT · FAN Operation 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.
Page 141 Instruction Si12-411A ■ 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 142: Adjusting The Air Flow Direction
Si12-411A Instruction Adjusting the Air Flow Direction FTK(X)E 25/35 B Adjusting the Air Flow Direction You can adjust the air flow direction to increase your com- fort. ■ To adjust the horizontal blades (flaps) 1. Press “SWING button”. The display will light up and the flaps will begin to swing.
Page 143 Instruction Si12-411A ■ To adjust the vertical blades (louvres) Hold the knob and move the louvres. (You will find a knob on the left-side and the right-side blades.) Notes on flaps and louvres angles • When “ SWING button ” is selected, the flaps In DRY mode or COOL mode swinging range depends on the operation mode.
Page 144 Si12-411A Instruction FTK(X)D 50/60/71 B Adjusting the Air Flow Direction You can adjust the air flow direction to increase your comfort. ■ To adjust the horizontal blade (flap) 1. Press “SWING button”. The display will light up and the flap will begin to swing.
Page 145 Instruction Si12-411A ■ To 3-D Airflow 1. 3. press “SWING button”: the “ ” “ ” display will light up and the flaps and louvers will move in turn. ■ To cancel 3-D Airflow 2. 4. press “SWING button” Notes on louvers angles ■...
Page 146 Si12-411A Instruction FLK(X) 25/35/50/60 A Adjusting the Air Flow Direction You can adjust the air flow direction to increase your com- fort. ■ To adjust the horizontal blade (flap) 1. Press “SWING button”. The display will light up and the flaps will begin to swing.
Page 147 Instruction Si12-411A ■ To adjust the vertical blades (louvres) • When adjusting the louvre, use a robust and stable stool and watch your steps carefully. Hold the knob and move the louvres. (You will find a knob on the left side and the right side blades.) Notes on flap and louvres angles •...
Page 148: Powerful Operation
Si12-411A Instruction POWERFUL Operation 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 HOME LEAVE...
Page 149: Outdoor Unit Silent Operation
Instruction Si12-411A OUTDOOR UNIT SILENT Operation 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 conve- nient during night. ■...
Page 150: Home Leave Operation
Si12-411A Instruction HOME LEAVE Operation HOME LEAVE Operation HOME LEAVE operation is a function which allows you to record your preferred temperature and air flow rate settings. ■ To start HOME LEAVE operation 1. Press “HOME LEAVE button” . • The HOME LEAVE lamp lights up. ■...
Page 151 Instruction Si12-411A ■ What’s the HOME LEAVE operation Is there a set temperature and air flow rate which is most comfortable, a set temperature and air flow rate which you use the most? HOME LEAVE operation is a function that allows you to record your favorite set temperature and air flow rate.
Page 152: Intelligent Eye Operation
Si12-411A Instruction 2.10 INTELLIGENT EYE Operation FTK(X)E 25/35 B INTELLIGENT EYE Operation “INTELLIGENT EYE” is the infrared sensor which detects the human movement. ■ To start INTELLIGENT EYE operation 1. Press “SENSOR button”. ■ To cancel the INTELLIGENT EYE HOME LEAVE ON/OFF operation TEMP...
Page 153 Instruction Si12-411A ■ To adjust the angle of the INTELLIGENT EYE sensor • You can adjust the angle of the INTELLIGENT EYE sensor to increase the detection area. (Adjustable angle: 15° to right and left of centre) INTELLIGENT EYE 15˚ 15˚...
Page 154 Si12-411A Instruction FTK(X)D 50/60/71 B INTELLIGENT EYE Operation “INTELLIGENT EYE” is the infrared sensor which detects the human movement. ■ To start INTELLIGENT EYE operation 1. Press “SENSOR button”. ■ To cancel the HOME LEAVE INTELLIGENT EYE ON/OFF TEMP POWERFUL operation 2.
Page 155 Instruction Si12-411A “INTELLIGENT EYE” is useful for Energy Saving ■ ■ ■ ■ Energy saving operation • Change the temperature –2°C in heating / +2°C in cooling / +1°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 156: Timer Operation
Si12-411A Instruction 2.11 TIMER Operation 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 opera- tion •...
Page 157 Instruction Si12-411A ■ 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”. is displayed. blinks. 2. Press “TIMER Setting button” until the time setting reaches the point you like.
Page 158: Note For Multi System
Si12-411A Instruction 2.12 Note for Multi System Note for Multi System 〈〈 〈〈 〈〈 〈〈 〉〉 〉〉 〉〉 〉〉 What is a “Multi System”? This system has one outdoor unit connected to multiple indoor units. room Outdoor unit ■ Selecting the Operation Mode room Living room...
Page 159 Instruction Si12-411A ■ 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 160: Care And Cleaning
Si12-411A Instruction 2.13 Care and Cleaning FTK(X)E 25/35 B Care and Cleaning Before cleaning, be sure to stop the operation and CAUTION turn the breaker OFF. Units ■ Indoor unit, Outdoor unit and Remote controller 1. Wipe them with dry soft cloth. ■...
Page 161 Instruction Si12-411A Filters 1. Open the front grille. 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, photocatalytic deodorizing filter. •...
Page 162 Si12-411A 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 earth wire is not disconnected or broken. Check that the drain comes smoothly out of the drain hose during COOL or DRY operation.
Page 163 Instruction Si12-411A FTK(X)D 50/60/71 B Care and Cleaning Before cleaning, be sure to stop the operation and CAUTION turn the breaker OFF. Units ■ Indoor unit, Outdoor unit and Remote controller 1. Wipe them with dry soft cloth. ■ Front grille 1.
Page 164 Si12-411A Instruction Filters 1. Open the front grille. 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 165 Instruction Si12-411A 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 earth wire is not disconnected or broken. Check that the drain comes smoothly out of the drain hose during COOL or DRY operation.
Page 166 • When using the unit in a location where dirt may easily accumulate, clean the unit more frequently. Once every 2 weeks is recommended. • Ask your DAIKIN dealer how to clean them. Cleaning the drain pan • Clean the drain pan periodically, or drain piping may be clogged with dust and may result in water leakage.
Page 167 Instruction Si12-411A FLK(X) 25/35/50/60 A Care and Cleaning Before cleaning, be sure to stop the operation and CAUTION turn the breaker OFF. Units ■ Indoor unit, Outdoor unit and Remote controller 1. Wipe them with dry soft cloth. ■ Front grille 1.
Page 168 Si12-411A Instruction Filters 1. Open the front grille. 2. Pull out the air filters. • Push upwards the tab at the center of each air fil- ter, then pull it down. 3. Take off the air purifying filter, photocatalytic deodorizing filter. •...
Page 169 Instruction Si12-411A 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 earth wire is not disconnected or broken. Check that the drain comes smoothly out of the drain hose during COOL or DRY operation.
Page 170: Troubleshooting
Si12-411A Instruction 2.14 Troubleshooting 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. •...
Page 171 Instruction Si12-411A Check again. Please check again before calling a repair person. Case Check The air conditioner does not • Hasn’t a breaker turned OFF or a fuse blown? operate. • Isn’t it a power failure? (OPERATION lamp is off) •...
Page 172 Si12-411A Instruction Call the service shop immediately. WARNING ■ ■ ■ ■ When an abnormality (such as a burning smell) occurs, stop operation and turn the breaker OFF. Continued operation in an abnormal condition may result in troubles, electric shocks or fire. Consult the service shop where you bought the air conditioner.
Page 173 Instruction Si12-411A System Configuration...
Page 174: Part 6 Service Diagnosis
Si12-411A Part 6 Service Diagnosis 1. Caution for Diagnosis................164 1.1 Troubleshooting with the Operation Lamp ...........164 2. Problem Symptoms and Measures .............166 3. Service Check Function ..............167 4. Code Indication on the Remote Controller ..........168 4.1 Error Codes and Description of Fault ...........168 5.
Page 175: Caution For Diagnosis
Caution for Diagnosis Si12-411A 1. Caution for Diagnosis Troubleshooting with the 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 176 Si12-411A Caution for Diagnosis Caution: Operation stops suddenly. (Operation lamp blinks.) Cause of above trouble could be "Operation mode butting". Check followings; Are the operation modes all the same for indoor units connected to Multi system outdoor unit? If not set all indoor units to the same operation mode and confirm that the operation lamp is not blinking.
Page 177: Problem Symptoms And Measures
Problem Symptoms and Measures Si12-411A 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. Check the type of the indoor units.
Page 178: Service Check Function
Si12-411A Service Check Function Service Check Function 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 179: Code Indication On The Remote Controller
Code Indication on the Remote Controller Si12-411A 4. Code Indication on the Remote Controller Error Codes and Description of Fault Code Indication Description of Problem System Normal Insufficient gas Low-voltage detection Signal transmission error (between indoor and outdoor units) Unspecified voltage (between indoor and outdoor units) Anti-icing function in other rooms Indoor Indoor unit PCB abnormality...
Page 180: Troubleshooting
Si12-411A Troubleshooting 5. Troubleshooting Indoor Units - : Not used for troubleshooting ∗ : Varies depending on the cases. Indication on Description of The Fault Details of fault the remote (Refer to the controller indicated page.) Indoor unit in normal condition (Conduct a diagnosis of the outdoor —...
Page 181: Outdoor Units
Troubleshooting Si12-411A 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 Details of...
Page 182: Indoor Unit Pcb Abnormality
Si12-411A Troubleshooting Indoor Unit PCB Abnormality Remote Controller 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 Faulty connector connection Causes Troubleshooting...
Page 183: Freeze-Up Protection Control Or High Pressure Control
Troubleshooting Si12-411A Freeze-up Protection Control or High Pressure Control Remote Controller Display Method of High pressure control (heat pump model only) During heating operations, the temperature detected by the indoor heat exchanger Malfunction thermistor is used for the high pressure control (stop, outdoor fan stop, etc.) Detection 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 184 Si12-411A Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 Check the air passage. Refer to P.209 Is there any Provide sufficient air passage. short-circuit? Check the intake air filter. Is it very dirty? Clean the air filter.
Page 185: Fan Motor Or Related Abnormality
Troubleshooting Si12-411A Fan Motor or Related Abnormality 5.5.1 AC Motor Remote Controller Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor operation. Malfunction Detection Malfunction When the detected rotation speed is less than 50% of the HH tap under maximum fan motor rotation demand.
Page 186 Si12-411A Troubleshooting 5.5.2 DC Motor Remote Controller Display Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor operation. Malfunction Detection Malfunction When the detected rotation speed is less than 50% of the H tap under maximum fan motor rotation demand.
Page 187 Troubleshooting Si12-411A 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.206 and rotate fan by hand. Check No.02 Does fan rotate Replace fan motor.
Page 188: Thermistor Or Related Abnormality (Indoor Unit)
Si12-411A Troubleshooting Thermistor or Related Abnormality (Indoor Unit) Remote Controller 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 operation∗.
Page 189: Shutter Drive Motor / Shutter Limit Switch Abnormality
Troubleshooting Si12-411A Shutter Drive Motor / Shutter Limit Switch Abnormality Remote Controller Display Method of The shutter open / close performance is detected by the limit switch attached on its structure. In this way, the shutter drive motor and the shutter limit switch are checked for failure. Malfunction Detection Malfunction...
Page 190: Signal Transmission Error (Between Indoor And Outdoor Units)
Si12-411A Troubleshooting Signal Transmission Error (between Indoor and Outdoor Units) Remote Controller Display Method of The data received from the outdoor unit in indoor unit-outdoor unit signal transmission is checked whether it is normal. Malfunction Detection Malfunction When the data sent from the outdoor unit cannot be received normally, or when the content of the data is abnormal.
Page 191: Unspecified Voltage (Between Indoor And Outdoor Units)
Troubleshooting Si12-411A Unspecified Voltage (between Indoor and Outdoor Units) Remote Controller Display Method of The supply power is detected for its requirements (different from separate type and multi type) by the indoor / outdoor transmission signal. Malfunction Detection Malfunction The separate type and multi type are interconnected. Decision Conditions Supposed...
Page 192: Freeze-Up Protection Control
Si12-411A Troubleshooting 5.10 Freeze-up Protection Control Remote Controller Display Outdoor Unit LED Display Method of Indoor unit icing, during cooling operation, is detected by checking the temperatures sensed by the indoor unit heat exchanger thermistor and room temperature thermistor that are located in a Malfunction shut-down room.
Page 193 Troubleshooting Si12-411A Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.4 Check the wiring and piping. Refer to P.207 Check No.6 Wiring or piping out of spec? Activate the wiring error Refer to P.209 check mode.
Page 194: Ol Activation (Compressor Overload)
Si12-411A Troubleshooting 5.11 OL Activation (Compressor Overload) Remote Controller 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. The error counter will reset itself if this or any other error does not occur during the following Decision 60-minute compressor running time (total time).
Page 195: Compressor Lock
Troubleshooting Si12-411A 5.12 Compressor Lock Remote Controller Display Outdoor Unit LED Display Method of A compressor lock is detected by checking the compressor running condition through the position detection circuit. Malfunction Detection Malfunction The position detection circuit detects a compressor frequency of below 10 Hz for 20 seconds or a frequency of above 160 Hz.
Page 196: Dc Fan Lock
Si12-411A Troubleshooting 5.13 DC Fan Lock Remote Controller 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 the Hall IC. Malfunction Detection Malfunction The fan does not start in 30 seconds even when the fan motor is running. The system will be shut down if the error occurs 16 times.
Page 197: Input Over Current Detection
Troubleshooting Si12-411A 5.14 Input Over Current Detection Remote Controller Display Outdoor Unit LED Display Method of An input over-current is detected by checking the input current value being detected by CT with the compressor running. Malfunction Detection Malfunction The following CT input with the compressor running continues for 2.5 seconds. CT input : Above 20 A Decision The system will be shut down if the error occurs 16 times.
Page 198 Si12-411A Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.7 ∗ An input over-current may result from wrong internal wiring. If the wires have been disconnected and Refer to P.210 reconnected for part replacement, for example, and the system is interrupted by an input over-current, take the following procedure.
Page 199: Four Way Valve Abnormality
Troubleshooting Si12-411A 5.15 Four Way Valve Abnormality Remote Controller Display Outdoor Unit LED Display Method of The liquid pipe thermistor, the outdoor temperature thermistor and the outdoor unit heat exchanger thermistor are checked to see if they function within their normal ranges in the Malfunction operating mode.
Page 200 Si12-411A Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.5 Refer to P.208 Four-way valve coil Correct. disconnected (loose)? Check No.6 Refer to P.209 Harness out of connector? Reconnect.
Page 201: Discharge Pipe Temperature Control
Troubleshooting Si12-411A 5.16 Discharge Pipe Temperature Control Remote Controller Display Outdoor Unit LED Display Method of The discharge pipe temperature control (stop, frequency drooping, etc.) is checked with the temperature being detected by the discharge pipe thermistor. Malfunction Detection Malfunction If a stop takes place 6 times straight due to abnormal discharge pipe temperature, the system will be shut down.
Page 202: Position Sensor Abnormality
Si12-411A Troubleshooting 5.17 Position Sensor Abnormality Remote Controller Display Outdoor Unit LED Display Method of A compressor startup failure is detected by checking the compressor running condition through the position detection circuit. Malfunction Detection Malfunction The compressor fails to start in about 15 seconds after the compressor run command signal is sent.
Page 203: Ct Or Related Abnormality
Troubleshooting Si12-411A 5.18 CT or Related Abnormality Remote Controller Display Outdoor Unit LED Display Method of A CT or related error is detected by checking the compressor running frequency and CT- detected input current. Malfunction Detection Malfunction The compressor running frequency is below 55 Hz and the CT input is below 0.1 V. (The input current is also below 1.25 A.) Decision If this error repeats 4 times, the system will be shut down.
Page 204 Si12-411A Troubleshooting 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.213 again. Get the system started. ∗...
Page 205: Thermistor Or Related Abnormality (Outdoor Unit)
Troubleshooting Si12-411A 5.19 Thermistor or Related Abnormality (Outdoor Unit) P4, J3, J6, J8, J9, H9 Remote Controller Display Outdoor Unit LED Display Method of This type of error is detected by checking the thermistor input voltage to the microcomputer. [A thermistor error is detected by checking the temperature being detected by each thermistor.] Malfunction Detection Malfunction...
Page 206 Si12-411A Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 Turn on the power again. Refer to P.209 Error displayed again Reconnect. on remote controller? Connector or thermistor Reconnect.
Page 207: Electrical Box Temperature Rise
Troubleshooting Si12-411A 5.20 Electrical Box Temperature Rise Remote Controller Display Outdoor Unit LED Display Method of An electrical box temperature rise is detected by checking the radiation fin thermistor with the compressor off. Malfunction Detection Malfunction With the compressor off, the radiation fin temperature is above 80°C (above 75°C in the case of 8.0 ·...
Page 208 Si12-411A Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 WARNING Turn off the power and turn it on Refer to P.209 again. To cool down the electricals, the outdoor unit fan gets started when the radiation fin temperature rises above 80˚C and stops itself when...
Page 209: Radiation Fin Temperature Rise
Troubleshooting Si12-411A 5.21 Radiation Fin Temperature Rise Remote Controller Display Outdoor Unit LED Display Method of A radiation fin temperature rise is detected by checking the radiation fin temperature being detected by the fin thermistor with the compressor on. Malfunction Detection Malfunction If the radiation fin temperature with the compressor on is above 90°C for 5.2~7.5 kW-or-smaller...
Page 210 Si12-411A Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.6 Turn off the power and turn it on Refer to P.209 again to get the system started. Check No.7 Refer to P.210 Error displayed again?
Page 211: Output Over Current Detection
Troubleshooting Si12-411A 5.22 Output Over Current Detection Remote Controller 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. A speed error occurs while the compressor is running.
Page 212 Si12-411A Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.7 ∗ An output over-current may result from wrong internal wiring. If the wires have been disconnected and Refer to P.210 reconnected for part replacement, for example, and the system is interrupted by an output over-current, take the following procedure.
Page 213: Insufficient Gas
Troubleshooting Si12-411A 5.23 Insufficient Gas Remote Controller Display Outdoor Unit LED Display Method of Gas shortage detection I : A gas shortage is detected by checking the CT-detected input current value and the compressor running frequency. Malfunction Gas shortage detection II : A gas shortage is detected by checking the difference between Detection indoor unit heat exchanger temperature and room temperature as well as the difference between outdoor unit heat exchanger temperature and room temperature.
Page 214 Si12-411A Troubleshooting Troubleshooting Be sure to turn off power switch before connect or disconnect connector, Caution or parts damage may be occurred. Check No.4 Refer to P.207 Any thermistor Reconnect in position. disconnected? * Discharge pipe thermistor * Indoor / outdoor unit heat exchanger thermistor Check No.6 * Room temperature thermistor Refer to P.209...
Page 215: Low-Voltage Detection
Troubleshooting Si12-411A 5.24 Low-voltage Detection Remote Controller Display Outdoor Unit LED Display Method of An abnormal voltage rise or drop is detected by checking the detection circuit or DC voltage detection circuit. Malfunction Detection Malfunction An over-voltage signal is fed from the over-voltage detection circuit to the microcomputer, or the voltage being detected by the DC voltage detection circuit is judged to be below 150 V Decision for 0.1 second.
Page 216: Anti-Icing Function In Other Rooms / Unspecified Voltage (Between Indoor And Outdoor Units)
Si12-411A Troubleshooting 5.25 Anti-icing Function in Other Rooms / Unspecified Voltage (between Indoor and Outdoor Units) UA, UH Remote Controller Display Outdoor Unit LED Display Method of A wrong connection is detected by checking the combination of indoor and outdoor units on the microcomputer.
Page 217: Check
Check Si12-411A 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 218 Si12-411A Check 6.1.3 Electronic Expansion Valve Check Check No.4 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 219 Check Si12-411A 6.1.4 Four Way Valve Performance Check Check No.5 Turn off the power and turn it on again. ∗ Four way valve coil Cooling / dry : No continuity Start the heating-mode run. Heating : Continuity S80 voltage at DC 180-220 V with Replace the outdoor unit compressor on? PCB.
Page 220 Si12-411A Check 6.1.5 Thermistor Resistance Check Check No.6 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 221 Check Si12-411A 6.1.6 Installation Condition Check Check No.7 Installation condition check Check the allowable Abnormal Change the position of the air dimensions of the air suction discharge grille or the and discharge area. installation location. Normal Does the discharged air from other outdoor Change the position of the air unit cause an increase of discharge grille or the...
Page 222 Si12-411A Check 6.1.7 Discharge Pressure Check Check No.8 Discharge pressure check High Replace compessor. Open the stop valve. Is the stop valve open? Is the Replace the pipe installed at connection pipe deformed? the site. At the heat exchanger and Clean.
Page 223 Check Si12-411A 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 224 Si12-411A 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 225 Check Si12-411A 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 226 Si12-411A 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 227 Check Si12-411A Service Diagnosis...
Page 228: Part 7 Removal Procedure
Si12-411A Part 7 Removal Procedure 1. Outdoor Unit (80 / 90 Class) ...............218 1.1 Removal of Outer Panels ..............218 1.2 Removal of Propeller Fans..............221 1.3 Removal of Electrical Box ..............222 1.4 Removal of PCB...................229 1.5 Removal of Fan Motor................232 1.6 Removal of Electronic Expansion Valve and Thermistor .....234 1.7 Removal of Sound Insulation and Reactor...........235 1.8 Removal of Shunt.................237 1.9 Removal of Solenoid Valve and Four Way Valve.........238...
Page 229: Outdoor Unit (80 / 90 Class)
Outdoor Unit (80 / 90 Class) Si12-411A 1. Outdoor Unit (80 / 90 Class) Removal of Outer Panels Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Procedure Points Step External appearance.
Page 230 Si12-411A Outdoor Unit (80 / 90 Class) Step Procedure Points Unscrew 3 screws of the right panel, slide it downwards and release the tabs to remove. The figure shows the view of piping connections. Unscrew 1 screw of the front right panel, slide it downwards and release the tabs to remove.
Page 231 Outdoor Unit (80 / 90 Class) Si12-411A Step Procedure Points Unscrew 3 screws of the front panel to remove. Remove 4 screws of the discharge outlet grill. Slide the discharge outlet grill upwards and release 6 tabs to remove. Removal Procedure...
Page 232: Removal Of Propeller Fans
Si12-411A Outdoor Unit (80 / 90 Class) Removal of Propeller Fans Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the discharge outlet grill To take off propeller fan, remove the washer-fitted nut M8.
Page 233: Removal Of Electrical Box
Outdoor Unit (80 / 90 Class) Si12-411A Removal of Electrical Box Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the outer panels Match the colors of the tie such as top and front wires to A, B, C and D ports panels.
Page 234 Si12-411A Outdoor Unit (80 / 90 Class) Step Procedure Points Remove the earth wire. Remove 1 screw of the terminal board. Release the tab on the top right of the terminal board. Pull out the terminal Glass tube fuse and varistor board and open it.
Page 235 Outdoor Unit (80 / 90 Class) Si12-411A Step Procedure Points 2. Remove each wire harness Disconnect 4 connectors of the electronic expansion Connector Electronic Harness expansion length valve lead wires. valve No. (White) (Red) (Blue) (Yellow) When reconnecting, make sure to match the wire to the correct connector.
Page 236 Si12-411A Outdoor Unit (80 / 90 Class) Step Procedure Points Remove the connector for gas pipe thermistor. Remove the connector for thermistor. Outdoor air thermistor (Blue) Discharge pipe thermistor (Black) Heat exchanger thermistor (Gray) Remove the overload relay connector S40. Remove the reactor lead wire.
Page 237 Outdoor Unit (80 / 90 Class) Si12-411A Step Procedure Points Remove the relay connector for compressor. Remove the electrical box cover. Disconnect the fan motor connector. Remove the discharge pipe thermistor. Removal Procedure...
Page 238 Si12-411A Outdoor Unit (80 / 90 Class) Step Procedure Points Take off the thermistor Place the thermistor so that presser spring, and its end comes up to the end remove the thermistor. of the presser spring. Be careful not to lose the presser spring for the discharge pipe thermistor.
Page 239 Outdoor Unit (80 / 90 Class) Si12-411A Step Procedure Points Remove the outdoor air thermistor lead wire from the groove. Remove each wire harness, and dismount the electrical box by lifting it. Removal Procedure...
Page 240: Removal Of Pcb
Si12-411A Outdoor Unit (80 / 90 Class) Removal of Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Removing the controller Release the tab of the electrical box, and open the terminal board.
Page 241 Outdoor Unit (80 / 90 Class) Si12-411A Step Procedure Points Lift the PCB at the terminal board side. Disconnect each wire harness connector linked to the inverter PCB. Removal Procedure...
Page 242 Si12-411A Outdoor Unit (80 / 90 Class) Step Procedure Points The figure shows the S20: Electronic expansion valve controller PCB. coil A port S21: Electronic expansion valve coil B port S22: Electronic expansion valve coil C port S23: Electronic expansion valve coil D port S31: To CN14 (Pin 9) S32: To CN11 (Pin 5)
Page 243: Removal Of Fan Motor
Outdoor Unit (80 / 90 Class) Si12-411A Removal of 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 outer panels. Remove the fan motor lead wire connector S70.
Page 244 Si12-411A Outdoor Unit (80 / 90 Class) Step Procedure Points Remove 4 screws of the fan motor. Cut the wrapper fixing the lead wire. When reassembling, fix the lead wire to avoid contact with the propeller fan. Remove the fan motor. Removal Procedure...
Page 245: Removal Of Electronic Expansion Valve And Thermistor
Outdoor Unit (80 / 90 Class) Si12-411A Removal of Electronic Expansion Valve Thermistor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove each wire Place the thermistor so that harness.
Page 246: Removal Of Sound Insulation And Reactor
Si12-411A Outdoor Unit (80 / 90 Class) Removal of Sound Insulation Reactor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Release the clip fixing the compressor lead wire.
Page 247 Outdoor Unit (80 / 90 Class) Si12-411A Step Procedure Points Remove the noise Carefully remove the noise insulation (top). insulation, which is easily torn in the piping section. Remove the noise insulation (inner). Remove 1 screw of the reactor. Removal Procedure...
Page 248: Removal Of Shunt
Si12-411A Outdoor Unit (80 / 90 Class) Removal of Shunt Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove 6 screws of Fasten the rubber packing the tie wire presser with double-faced adhesive plate.
Page 249: Removal Of Solenoid Valve And Four Way Valve
Outdoor Unit (80 / 90 Class) Si12-411A Removal of Solenoid Valve 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 Remove the outer panels. 1.
Page 250 Si12-411A Outdoor Unit (80 / 90 Class) Step Procedure Points Before taking this Reassembling precautions procedure, make sure 1. Use non-oxidizing brazing there is no refrigerant gas method. If nitrogen gas is not left in the refrigerant available, braze the parts pipes.
Page 251: Removal Of Compressor
Outdoor Unit (80 / 90 Class) Si12-411A 1.10 Removal of Compressor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the terminal cover. Remove the overload relay.
Page 252 Si12-411A Outdoor Unit (80 / 90 Class) Step Procedure Points Make sure there is no refrigerant gas left inside Warning the refrigerant pipes The compressor's refrigerating before starting the job. machine oil may catch fire. Have When heating up the wet cloth at hand for quickly putting brazed parts, make sure out the fire.
Page 253: Outdoor Unit (50 / 52 / 58 / 68 / 75 Class)
Outdoor Unit (50 / 52 / 58 / 68 / 75 Class) Si12-411A 2. Outdoor Unit (50 / 52 / 58 / 68 / 75 Class) Removal of Outer Panels Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Page 254: Removal Of Electrical Box
Si12-411A Outdoor Unit (50 / 52 / 58 / 68 / 75 Class) Removal of Electrical BOX Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Removing the tie wires The figure shows the tie pipe connections.
Page 255 Outdoor Unit (50 / 52 / 58 / 68 / 75 Class) Si12-411A Step Procedure Points Pull out the terminal Glass tube fuse and varistor board to open. cannot be replaced individually because lead- free soldering is provided. 2. Remove each wire harness Disconnect 4 Connector...
Page 256 Si12-411A Outdoor Unit (50 / 52 / 58 / 68 / 75 Class) Step Procedure Points Disconnect the compressor relay connector. Remove the reactor lead wire. 3. Removing the wiring fixture Remove 6 screws of the wiring fixture. 4. Removing the electrical box.
Page 257 Outdoor Unit (50 / 52 / 58 / 68 / 75 Class) Si12-411A Step Procedure Points Remove 1 screw of the electrical box. Remove the drip-proof cover. Disconnect the fan motor lead wire. Lift up the electrical box and dismount it. Removal Procedure...
Page 258: Removal Of Pcb
Si12-411A Outdoor Unit (50 / 52 / 58 / 68 / 75 Class) Removal of Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points 1. Removing the controller Remove 1 screw of the PCB, and release two tabs.
Page 259 Outdoor Unit (50 / 52 / 58 / 68 / 75 Class) Si12-411A Step Procedure Points Lift up the control PCB. Disconnect each wire harness connector linked to the control PCB. (Pin 9): To CN14 (Pin 5): To CN11 (Pin 10): To S34 (Pin 8): To S72 Removal Procedure...
Page 260 Si12-411A Outdoor Unit (50 / 52 / 58 / 68 / 75 Class) Step Procedure Points The figure shows the Glass tube fuse 3A control PCB. 2. Removing the service monitor PCB The figure shows the service monitor PCB. 3. Removing the inverter PCB.
Page 261: Removal Of Fan Motor
Outdoor Unit (50 / 52 / 58 / 68 / 75 Class) Si12-411A Removal of 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 For reassembling, align lead wire connector.
Page 262: Removal Of Sound Insulation
Si12-411A Outdoor Unit (50 / 52 / 58 / 68 / 75 Class) Removal of Sound Insulation Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove 5 screws of the right side panel.
Page 263: Removal Of Four Way Valve Coil, Solenoid Valve Coil
Outdoor Unit (50 / 52 / 58 / 68 / 75 Class) Si12-411A Removal of Four Way Valve Coil, Solenoid Valve Coil, Electronic Expansion Valve Coil Thermistor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Page 264 Si12-411A Outdoor Unit (50 / 52 / 58 / 68 / 75 Class) Step Procedure Points Take off the putty, and Place the thermistor so that remove each its end comes up to the end thermistor. of the presser spring. Be careful not to lose the presser spring for the discharge pipe...
Page 265: Removal Of Four Way Valve, Solenoid Valve And Shunt
Outdoor Unit (50 / 52 / 58 / 68 / 75 Class) Si12-411A Removal of Four Way Valve, Solenoid Valve Shunt Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points...
Page 266: Removal Of Solenoid Valve And Shunt
Si12-411A Outdoor Unit (50 / 52 / 58 / 68 / 75 Class) Removal of Solenoid Valve Shunt Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Before taking this procedure, make sure there is no refrigerant gas...
Page 267: Removal Of Compressor
Outdoor Unit (50 / 52 / 58 / 68 / 75 Class) Si12-411A Removal of Compressor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work. Step Procedure Points Remove the terminal cover.
Page 268: Part 8 Others
Si12-411A Part 8 Others 1. Others ....................258 1.1 Test Run from the Remote Controller ..........258 1.2 Jumper Settings ...................259 Others...
Page 269: Others
Others Si12-411A 1. Others Test Run from the Remote Controller Trial Operation and Testing 1. Measure the supply voltage and make sure that it falls in the specified range. 2. Trial operation should be carried out in either cooling or heating mode. For Heat pump In cooling mode, select the lowest programmable temperature;...
Page 270: Jumper Settings
Si12-411A Others Jumper Settings 1.2.1 When Two Units are Installed in One Room How to set the different addresses. When two indoor units are installed in one room, the two wireless remote controllers can be set for different addresses. PCB in the indoor unit Remove the front panel.
Page 271 Others Si12-411A 1.2.3 Adjusting the Angle of the Intelligent Eye Sensor Wall Mounted Type 25 / 35 Class Only 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°...
Page 272: Part 9 Appendix
Si12-411A Part 9 Appendix 1. Piping Diagrams..................262 1.1 Indoor Units ..................262 1.2 Outdoor Units ..................266 2. Wiring Diagrams..................273 2.1 Indoor Units ..................273 2.2 Outdoor Units ..................276 Appendix...
Page 273: Piping Diagrams
Piping Diagrams Si12-411A 1. Piping Diagrams Indoor Units 1.1.1 Wall Mounted Type FTKE25/35BVM, FTK(X)E25/35BVMA FTK(X)S20CVMB(9), FTK(X)S25/35CVMB(9)(8), ATXS20/25/35CVMB(9), FTXS25/35BVMA INDOOR UNIT INDOOR UNIT HEAT EXCHANGER HEAT EXCHANGER 7. 0CuT 7.0CuT 6. 4CuT 6.4CuT THERMISTOR 6. 4CuT THERMISTOR 6.4CuT ON HEAT EXCH. ON HEAT EXCH.
Page 274 Si12-411A Piping Diagrams FTKD71BVM, FTK(X)D71BVMA INDOOR UNIT ( 7.9CuT ) HEAT EXCHANGER THERMISTOR ON HEAT EXCH. CROSS FLOW FAN FIELD PIPING ( 9.5CuT ) FAN MOTOR FIELD PIPING ( 15.9CuT ) ( 12.7CuT ) REFRIGERANT FLOW COOLING HEATING 4D040083F Appendix...
Page 275 Piping Diagrams Si12-411A 1.1.2 Duct Connected Type CDKD25/35/50/60CVM, CDK(X)S25/35/50/60CVMB, CDK(X)D25/35/50/60CVMA CDXS25/35/50/60CVMA INDOOR UNIT ( 6.4CuT ) INDOOR UNIT (6. 4CuT) HEAT EXCHANGER HEAT EXCHANGER THERMISTOR ON HEAT FIELD PIPING EXCH. ( 6.4CuT ) SIROCCO FAN THERMISTOR FIELD PIPING ON HEAT (6.
Page 276 Si12-411A Piping Diagrams 1.1.4 Floor Standing Type FVK(X)S25/35BVMB, FVXS35BVMA INDOOR UNIT HEAT EXCHANGER THERMISTOR CROSS FLOW FAN FAN MOTOR ON HEAT EXCH. 7.0CuT 7.0CuT CROSS FLOW FAN FAN MOTOR FIELD PIPING ( 6.4CuT ) SINGLE UNION JOINT 9.5CuT FIELD PIPING ( 9.5CuT ) SINGLE UNION JOINT REFRIGERANT FLOW...
Page 277: Outdoor Units
Piping Diagrams Si12-411A Outdoor Units 1.2.1 Cooling Only 2MK58BVM OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPERATURE THERMISTOR ( DOA ) HEADER MOTOR OPERATED VALVE 9.5CuT 6.4CuT ROOM A ( 6.4 CuT ) FILTER FIELD FILTER PIPING HEAT EXCHANGER MOTOR OPERATED VALVE LIQUID THERMISTOR ( DE ) DISTRIBUTOR...
Page 278 Si12-411A Piping Diagrams 3MKD75BVM, 3MKD75BVMA OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPARETURE THERMISTOR ( DOA ) MOTOR OPERATED VALVE HEADER 6.4CuT 9.5CuT ROOM A ( 6.4 CuT ) FILTER MOTOR OPERATED VALVE 6.4CuT FIELD ROOM B PIPING FILTER ( 9.5 CuT ) FILTER HEAT EXCHANGER LIQUID...
Page 279 Piping Diagrams Si12-411A 4MKD90BVM, 4MKD90BVMA OUTDOOR UNIT HEAT EXCHANGER MOTOR OPERATED VALVE OUTDOOR TEMPERATURE THERMISTOR(DOA) HEADER 7. 9CuT ROOM A 7. 9CuT (6. 4CuT) FILTER MOTOR OPERATED VALVE 7. 9CuT 7. 9CuT 7. 9CuT ROOM B 7. 9CuT (6. 4CuT) 7.
Page 280 Si12-411A Piping Diagrams 4MKS58BVMB(8) OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPARATURE THERMISTOR ( DOA ) MOTOR OPERATED VALVE LIQUID PIPE THERMISTOR ( DLA ) HEADER 6.4CuT 9.5CuT ROOM A ( 6.4 CuT ) FILTER MOTOR OPERATED VALVE LIQUID PIPE THERMISTOR ( DLB ) 6.4CuT ROOM B ( 6.4 CuT )
Page 281 Piping Diagrams Si12-411A 4MKS90BVMB OUTDOOR UNIT MOTOR OPERATED VALVE HEAT EXCHANGER LIQUID PIPE OUTDOOR TEMPERATURE THERMISTOR ( DLA ) THERMISTOR ( DOA ) HEADER 7.9CuT ROOM A 7.9CuT ( 6.4CuT ) FILTER MOTOR OPERATED VALVE LIQUID PIPE 7.9CuT THERMISTOR ( DLB ) 7.9CuT 7.9CuT 7.9CuT...
Page 282 Si12-411A Piping Diagrams 1.2.2 Heat Pump 3MXS52BVMB(8), 3AMXS52BVMB OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPARATURE THERMISTOR ( DOA ) HEADER HEADER MOTOR OPERATED VALVE LIQUID PIPE 9.5CuT THERMISTOR ( DLA ) 6.4CuT ROOM A ( 6.4 CuT ) FILTER MOTOR OPERATED VALVE LIQUID PIPE THERMISTOR ( DLB ) 6.4CuT...
Page 283 Piping Diagrams Si12-411A 4MXS68BVMB9, 4MXS68CVMA OUTDOOR UNIT HEAT EXCHANGER OUTDOOR TEMPERATURE THERMISTOR ( DOA ) MOTOR OPERATED VALVE LIQUID PIPE HEADER THERMISTOR ( DLA ) HEADER 6.4CuT 9.5CuT ROOM A ( 6.4 CuT ) FILTER MOTOR OPERATED VALVE LIQUID PIPE THERMISTOR ( DLB ) 6.4CuT ROOM B...
Page 284: Wiring Diagrams
Si12-411A Wiring Diagrams 2. Wiring Diagrams Indoor Units 2.1.1 Wall Mounted Type FTKE25/35BVM, FTK(X)E25/35BVMA FTK(X)S20CVMB(9), FTK(X)S25/35CVMB(9)(8), ATXS20/25/35CVMB(9), FTXS25/35BVMA PCB3 PCB1 INTELLIGENT- → 3.15A EYE SENSOR outdoor TERMINAL FOR PCB2 CENTRALIZED CONTROL FIELD WIRING. TRANSMISSION LED1 LED2 LED3 CIRCUIT CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS SIGNAL...
Page 285 Wiring Diagrams Si12-411A FTKD50/60/71BVM, FTK(X)D50/60/71BVMA FTK(X)S60/71BVMB, FTXS60/71BVMA(8) FIELD WIRING. PCB3 PCB1 RECTIFIER 3.15A OUTDOOR ° CAUTION TRANSMISSION NOTE THAT OPERATION WILL CIRCUIT RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS PCB4 TURNED OFF AND THEN BACK ON AGAIN. LED1 LED2 LED3 : FRAME GROUND : FUSE...
Page 286 Si12-411A Wiring Diagrams 2.1.3 Floor / Ceiling Suspended Dual Type FLK(X)25/35/50/60AVMA, FLK(X)S25/35/50/60BVMB, FLXS25/35/50/60BVMA PCB3 PCB1 PCB2 3.15A → outdoor / YLW FIELD WIRING. PCB4 TRANSMISSION CIRCUIT CAUTION NOTE THAT OPERATION WILL SIGNAL RESTART AUTOMATICALLY IF RECEIVER THE MAIN POWER SUPPLY IS indoor TURNED OFF AND THEN BACK ON AGAIN.
Page 287: Outdoor Units
Wiring Diagrams Si12-411A Outdoor Units 2.2.1 Cooling only 2MKD58BVM POWER SUPPLY FU201 MID2 ~50Hz 220-240V ~60Hz 220-230V 3.15A FIELD WIRING MRM20 MRM10 X11A TO INDOOR UNIT CN11 ROOM A R12T MID1 CN14 3.15A t° ROOM B S101 t° t° t° t°...
Page 288 Si12-411A Wiring Diagrams 4MKD75/90BVM, 4MKD90BVMA POWER SUPPLY FU201 ~50Hz 220-240V MID2 ~60Hz 220-230V 3.15A FIELD WIRING MRM20 MRM10 X11A TO INDOOR UNIT CN11 ROOM A MID1 R12T CN14 3.15A t° ROOM B 1 S40 ROOM C S101 ROOM D t° t°...
Page 289 Wiring Diagrams Si12-411A 4MKS58BVMB(8), 4MKS75BVMB, 4MKS90BVMB POWER SUPPLY FU201 MID2 ~50Hz 220-240V ~60Hz 220-230V 3.15A FIELD WIRING MRM20 MRM10 X11A TO INDOOR UNIT CN11 ROOM A R12T MID1 CN14 3.15A t° ROOM B ROOM C S101 ROOM D t° t° t°...
Page 290 Si12-411A Wiring Diagrams 2.2.2 Heat Pump 3MXD68BVMA, 3MXS52BVMB(8), 3AMXS52BVMB POWER SUPPLY FU201 MID2 ~50Hz 220-240V 3.15A ~60Hz 220-230V FIELD WIRING MRM20 MRM10 X11A TO INDOOR UNIT CN11 ROOM A MID1 R12T CN14 3.15A t° ROOM B ROOM C S101 t° t°...
Page 291 Wiring Diagrams Si12-411A 4MXS80CVMA FU201 MID2 3.15A FIELD WIRING MRM20 MRM10 X11A TO INDOOR UNIT CN11 ROOM A MID1 R12T CN14 3.15A t° ROOM B ROOM C S101 ROOM D t° t° t° t° t° t° t° t° t° t° t°...
Page 292 Si12-411A Index Numerics cooling / heating mode lock........108 CT or related abnormality........192 3 minutes stand-by..........93 3-D airflow ...............74 DC fan lock............185 defrost control ............97 A1................171 discharge pipe ............100 A5..............172, 181 discharge pipe control ..........94 A6..............174, 175 discharge pipe temperature control......
Page 293 Si12-411A F3 ................190 J3 ................. 194 fan control ...............96 J4 ................. 259 fan motor ............232, 250 J6 ................. 194 fan motor connector output check......206 J8 ................. 194 fan motor or related abnormality J9 ................. 194 AC motor ............174 JA ........... 58, 61, 63, 64, 66, 259 DC motor ............175 JB ...........
Page 294 Si12-411A position sensor abnormality ........191 service check function .......... 167 power failure recovery function ..58, 61, 63, 64, 66 service monitor PCB ......231, 247, 249 power supply PCB..........65, 67 shunt ............ 237, 254, 255 power supply waveforms check ......212 shutter drive motor / shutter limit switch abnormality power transistor check ..........213 ..............
Page 295 Si12-411A Index...
Page 296 Si12-411A Drawings & Flow Charts input current control ..........94 input over current detection........186 anti-icing function in other rooms ......205 installation condition check ........210 automatic air flow control ........75 insufficient gas ............. 202 automatic operation..........77 insufficient gas control.......... 103 auto-swing...............74 INTELLIGENT EYE ..........
Page 297 Si12-411A target discharge pipe temperature control ....101 thermistor or related abnormality (indoor unit) ..177 thermistor or related abnormality (outdoor unit) ..194 thermistor resistance check ........209 troubleshooting with the LED indication ....165 turning speed pulse input on the outdoor unit PCB check..............214 unspecified voltage (between indoor and outdoor units) .............
Page 298 Si12-411A Printed in Singapore 03/2005 AK COS...

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