Service Manual
Contents
1. Above charge is for piping runs up to 25 ft 7 6 m For piping runs greater than 25 ft 7 6 m add 0 1 oz of refrigerant per foot of extra piping up to the allowable length 421 08 9300 00 Specifications subject to change without notice REFRIGERANT LINE LENGTHS ft m Unit Size Max Line Lenath Max Elevation Max Elevation CAPACITY LOSS 9 ID over OD OD over ID Capacity Loss 9K 65 20 35 11 35 11 Line Length ft 12K 65 20 35 11 35 11 Cooling 25 45 65 100 18K 100 30 30 15 30 15 9 amp 12 KBTU H models 0 2 5 24K 100 30 60 18 60 18 The following are the piping sizes EM Models 0 ES 1 P To CERA T 9 amp 12 KBTU H models 0 7 11 it Siz ix n s 9K 1 4 3 8 18 amp 24 KBTU H models 0 7 11 15 12K 1 4 1 2 18K 1 4 1 2 24K 3 8 5 8 Refrigerant Charge REFRIGERANT CHARGE Ib kg Unit Size Air Conditioner Heat Pump 9K 2 3 1 0 2 4 1 1 12K 2 9 1 3 3 0 1 4 18K 4 4 2 0 TBD 24K TBD TBD 16 SERVICE MANUAL SYSTEM EVACUATION AND CHARGING CAUTION UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation Never use the system compressor as a vacuum pump Refrigerant tubes and indoor coil should be evacuated using the recommended deep vacuum method of 500 microns The alternate2. Condensate Pumps Crankcase Heater Wind Baffles m t Sizes 18k amp 24k Legend S Standard A Accessory O Optional F Field Fabricated 3 Specifications subject to change without notice Indoor Units A07892 Fig 1 Condensate Pump On high wall fan coils the condensate pump has a lift capability of 18 ft 5 5 m or the discharge side with the pump mounted in the fan coil or 6 ft 1 8 m on the suction side if the pump must be remote mounted The pump mounts inside the unit with quick plug in connections and is recommended when adequate drain line pitch cannot be provided or when the condensate must move up to exit NOTE An external 115v power source will be required to run the pump on unit sizes 9k and 12k Outdoor Units Low Ambient Kit The kit controls condenser fan cycling using a pressure switch It is specifically designed to control fan motor cycles in response to saturated condensing pressure This device maintains a constant saturated condensing temperature of 100 F 10 F 37 78 C 12 22 C at outdoor air temperatures between 55 F and 20 F 12 78 C 12 22 C and can be used on all outdoor units without changing the outdoor fan motor Crankcase Heater Available for units with rotary compressors Heater clamps around compressor oil sump Recommended for low ambient applications on sizes 9 12 18 24 and long line applications 421 08 9300 00 SERVI
3. F Duct Free Split System High Wall Continuous Operation Outdoor Tempera we ppd OX oo ag a oling Confinuous iE perat indoor Temperature C ui Use low ambient control if the unit will operate in cooling at ambient conditions below 55 F 12 78 C DFS4 A H DFC4 A H 3 DFFA A H H A08180 Fig 4 System Operating Envelope UNIT paling COMPRESSOR OUTDOOR FAN INDOOR FAN MAX SIZE MCA FUSE CB MAX MIN VOLTS PH HZ RLA LRA FLA HP w VOLTS FLA HP w AMP 009 7 5 40 1 1 0 034 20 12 20 127 104 115 1 60 0 60 0 102 23 35 DC 012 9 9 47 148 0 044 25 15 25 012 5 2 21 0 88 0 116 36 35 DC 148 0 044 25 9 15 018 253 187 208 230 1 60 7 3 32 6 0 78 0 224 53 0 26 0 075 81 11 20 208 230 1 60 024 9 7 34 8 0 68 0 248 100 0 39 0 112 50 14 25 Permissible limits of the voltage range at which the unit will operate satisfactorily LEGEND FLA Full Load Amps LRA Locked Rotor Amps MCA Minimum Circuit Amps RLA Rated Load Amps 421 08 9300 00 Specifications subject to change without notice SERVICE MANUAL Duct Free Split System High Wall DFS4 A H DFC4 A H 3 DFFA A H H WIRING The main power is supplied to the outdoor unit The field supplied connecting cable from the outdoor unit to indoor unit consists of four wires and provides the power for the indoor unit as well as the communication sign
4. Replace battery Problem solved Go to chart 13 Check input and output on No outdoor board OK Replace outdoor board Replace indoor board Hr unit breaker and fix Yes azar js Yes EM o Yes Check components Ok Yes Check fuse s on indoor Yes Check input and output on Flow charts 10 thru 12 board Ok indoor board Ok No No Determine defective component and replace Replace defective Replace fuse component For sizes 18 and 24 K units only For sizes 9 and 12K units proceed to check inputs and outputs on indoor boards A08169 Outdoor coil clean Glean coil Problem Problem solved persists Yes Yes Indoor filter clean Clean filter Problem No Problem solved persists Yes Yes Check indoor fan Replace indoor fan motor motor Yes Connect gauges to Yes Check application unit Pressures ok limits Suction and head Normal suction High head high High head low equal high head suction suction Yes Yes Yes Yes Non condensables Unit is overcharged Check compressor in sys Pump down Reclaim charge and See note below and recharge unit weigh in correct chargd Restriction in system Check capillary tube check for moisture and check for damage to liquid line between indoor and outdoor units A08170 27 421 08 9300 00 Specifications subject to change without notice SERVICE MANUAL Duct Free Split System High Wall DFSA A H DFC4 A H 3 DFF
5. 1 D o W3MOd NIVN m 4n YOSNIS dW3l YIY ZSL YOSNSS dW3l 1109 ISL 32018 WWNINH3I 81 YOLOW H3dd3l5 5 YOLOSNNOD Nid d 03 1 8l HOLOW NVJ Y0001N0 W40 lddhs UuzMmOd 35nJ 4 YOLOW NV4 YOOONT W4I auvog Av1dsId gd YOSNSS LNayuNd 59 AV13H HOSS3HdWOO HO HO193NNO2 ON Id 9 HOSS3HdNO2 dWOd WollovdvO9 NY4 uoodino Zdvo NOLIOVdvO9 HOSS3HdMWOO Layo QHVOS TOYLNOD X0001N0 820 QHVOS8 1OHINOO HOOONI 891 3AVN 1uvd 3009 30 39V1 0A M07 LINN SOOGNI LNOD SWVH5VIG 5NIBHIA 11 Specifications subject to change without notice 421 08 9300 00 DFSA A H DFC4 A H 3 DFFA A H H Duct Free Split System High Wall SERVICE MANUAL VLIMSLHVUJJG g ES LEVEOAG wesbeig Buin VEIMSLHVUJAG IINA 300QNT Adds uaMod iINn 8l YOOQNI 09 0EZ BOZ a IOH1NO2 09 1 0 c 80c AlddNS S3MOd 2 HOSN3S dW3l HIV 51 YOSNSS dHW3l 1102 ISL U3AHOJSNVHL NVHL 32018 WWNIWH3I 8l YOLOW H3dd3lS S YOLOSNNOD NId d YOLOW Nv4 YOOdLNO W40 ISNI d HOLOW NV4 HOOONI H3I Quvo8 Av1dsId 80 HOSN3S 1N3HHf2 SO Av13H HO0SS3HdNO2 YO HOLOINNOD 9frid 9 HOSS3HdNO2 dW09 HOLIOVdV2 Nv4 YOOdLNO Zdv9 HO
6. 10 20 7184 98 6 37 5 8736 147 2 64 2 0373 51 8 11 19 6891 100 4 38 5 6296 149 65 1 9653 53 6 12 18 7177 102 2 39 5 3969 150 8 66 1 8963 55 4 13 17 8005 104 40 5 1752 152 6 67 1 83 57 2 14 16 9341 105 8 41 4 9639 154 4 68 1 7665 59 15 16 1156 107 6 42 4 7625 156 2 69 1 7055 60 8 16 15 3418 109 4 43 4 5705 158 70 1 6469 A7 Fuse Chart See Fuse Rating Amps Volts Unit Size Indoor Outdoor Outdoor 009 3 15A 250V 2A 250V 012 3 15A 250V 2A 250V 018 3 15A 250V 3 15A 250V 024 3 15A 250V 3 15A 250V The 3 15A fuses protect the board against the indoor or outdoor fan motors The 2A fuses protect the board against a Class II circuit board failure 33 Specifications subject to change without notice 421 08 9300 00 SERVICE MANUAL Duct Free Split System High Wall DFS4 A H DFC4 A H 3 DFFA A H H A8 Indoor Unit Diagnostic Guides 9K amp 12K Units Operation Timer Diagnostic Lamp Lamp Failure Mode had x X Indoor fan speed has been out of control for over 1 minute 1 x On Indoor room temp or evaporator sensor is open circuit or short circuited 2 X Compressor over current protection has been activated four times 3 On EPROM error x Indoor unit communication error Illuminates simultaneously 4 18K amp 24K Units Operation Timer Defrostin Auto Diagnostic Lamp Lamp Lamp i Lamp
7. APPLICATION 09 9 000 BTUH ton 12 12 000 BTUH 1 ton 18 18 000 BTUH 1 tons 24 24 000 BTUH 2 tons NOMINAL CAPACITY J 115 1 60 K 208 230 1 60 SUPPLY VOLTAGE 1 Single Zone 2 Dual Zone 3 Tri Zone SALES CODE FEATURES Sales Code 421 08 9300 00 Specifications subject to change without notice 2 SERVICE MANUAL Duct Free Split System High Wall DFS4 A H DFC4 A H 3 DFFA A H H STANDARD FEATURES AND ACCESSORIES Ease Of Installation Mounting Brackets Low Voltage Controls oo Comfort Features Microprocessor Controls Wireless Remote Control Automatic Air Sweep Air Direction Control Auto Restart Function Cold Blow Protection On Heat Pumps Turbo Mode On Sizes 9K and 12 K Auto Changeover On Heat Pumps DID DN MN MM nM Energy Saving Features Sleep Mode n Stop Start Timer n Safety And Reliability 3 Minute Time Delay For Compressor Over Current Protection For Compressor Indoor Coil Freeze Protection Indoor Coil High Temperature Protection On Heat Pumps Condenser High Temperature Protection On heat Pumpst Accumulator On Heat Pumps NIM oooo Ease Of Service And Maintenance Cleanable Filters Diagnostics Liquid Line Pressure Taps Suction And Discharge Pressure Taps Sizes 18 and 24K oo oo Application Flexibility Low Ambient Controls 20 F
8. Failure Mode Chart X Xx Over current protection of the compressor occurs four times 3 X X X X Indoor room temp sensor is open circuit or short circuited 2 X X X Temp sensor on indoor evaporator is open circuit or short circuited 2 X X x X Temp sensor on outdoor condenser is open circuit or short circuited not cool 2 ing only modes X X x Outdoor unit protects outdoor temp sensor phase order etc 5 X x X EPROM error X X X Indoor unit communication error 6 x Flashing X Off Replace Indoor Board Infrared signal receptor Infrared signal receptor OPERATION AUTO TIMER PRE DEF OPERATION AUTO TIMER TIMER OPERATION O O O _ e e e PRE DEF ss A07546a ECON PRE DEF E mm e e i Model size Model size Model size 009 012 018 024 PRE DEF light will illuminate when the unit is running in FAN ONLY mode on Cooling Only units Fig 27 LED Display Panel A9 Outdoor Unit Diagnostic Guides Flashing Times Diagnostic after 2 Second Failure Mode Off Chart 5 Communication failure 4or 6 2 Condenser temperature sensor failure 2 1 Other indoor failure If the unit is operating normally the LED light on the outdoor board is lit continuously specific number of times Refer to the Outdoor Unit Diagnostic table above to determine failure 421 08 9300 00 Specifications subject to change without notice If there is a failure the LED light will flash a 34
9. Sound Rating 8 oa w 9 Maximum Vertical Separation ft ol Indoor Higher than Outdoor Ta 14 8 35 Maximum Vertical Separation ft 35 4 33 8 T 1 2 Indoor Lower than Outdoor 50 8 38 11 5 Factory Charge R 410A lbs ta ta Net Weight Outdoor Lbs Kg 117 53 151 68 5 Net Weight Indoor Lbs Kg 25 4 11 5 39 7 18 A series models 17 2 ton offer low ambient kit as an accessory OUTDOOR ELECTRICAL DATA Min Max Voltage Oper Oper ue Volts Volts DFC4H309J1B 7 5 AEREA tba tba tba 3 8 5 8 Maximum Line set Length ft 65 tba 68 5 7 18 INDOOR ELECTRICAL DATA DFFAHHOSJIA 115 1 60 DFF4HH12J1A 115 1 60 tba DFF4HH18K1A 208 230 1 60 DFF4HH24K1A 208 230 1 60 A series models 172 2 ton offer low ambient kit as an accessory 5 Specifications subject to change without notice 421 08 9300 00 SERVICE MANUAL Duct Free Split System High Wall DFS4 A H DFC4 A H 3 DFF4 A H H DIMENSIONS INDOOR D W A07336 Model Size in nni in an in a Weight Ib kg 9K 32 09 815 11 02 280 7 68 195 24 2 11 12K 35 67 906 11 26 286 9 25 235 33 0 15 18K 49 21 1250 12 80 325 9 06 230 55 0 25 24K 49 21 1250 1
10. for diagnostic purposes The system is forced to run in cooling for 30 minutes After 30 minutes the 9k and 12k systems will switch to Dry mode with a default set point of 75 2 F The 18k and 24k systems will switch to Forced Auto mode When the system is in Forced Cooling mode it will not respond to signals from the remote control The only way to exit the Forced Cooling mode is to push the manual button once to switch the system to remote control mode Specifications subject to change without notice 22 SERVICE MANUAL TROUBLESHOOTING Duct Free Split System High Wall DFS4 A H DFC4 A H 3 DFFA A H H This section provides the required flow charts to troubleshoot problems that may arise NOTE Information required in the diagnoses can be found either on the wiring diagrams or in the appendix Required Tools The following tools are needed when diagnosing the units Digital multimeter e Screw drivers Phillips and straight head e Needle nose pliers Recommended Steps 1 Refer to the diagnostic hierarchy chart below and determine the problem at hand 2 Go to the chart listed in the diagnostic hierarchy and follow the steps in the chart for the selected problem DIAGNOSTIC HIERARCHY Unit has a problem Unit displays a diagnostic code Refer to page A8 amp A9 identify error code and use appropriate diagnostic chart For EEROM error replace the indoor microprocessor board For the ease of service the syste
11. monitors the coil temperature continuously Any time the coil temperature drops below the TES limit for five consecutive minutes the compressor and outdoor fan will be switched off until the coil temperature rises above the TE6 as shown below Compressor and outdorr fan on EVAP temp down Compressor and outdoor fan off after 5 mins EVAP temp up gt T TE5 TE6 Evap Temp A08118 Fig 13 Indoor Coil Freeze Protection Coil Temperature F C Parameter DFCA AH DFCA A H DFCA AIH DFCA A H 309J1B 312J1B 318K1B 324K1A TE5 39 4 41 5 36 2 36 2 TE6 50 10 54 12 54 12 54 12 Condenser High Temperature Protection Condenser high temperature can occur due to any of the following conditions High outdoor ambient Outdoor fan blocked e Outdoor coil blocked The outdoor coil thermistor on a heat pump unit continuously monitors the temperature of the outdoor coil Anytime the coil temperature exceeds the TE10 limit the compressor is switched off and the outdoor fan continues running to reduce the coil temperature When the coil temperature drops below the TE11 limit the compressor is switched back on as shown below Compressor off Outdoor fan on COND temp up Compressoron i Outdoor fanon COND temp down TE11 TE10 T A08119 Fig 14 Condenser High Temp Protection Condenser Temp Parameter F C DFC4 A H 318K1B DFC4 A H 324K1B T
12. the appendix 6 Connect the red probe to hot signal and the black probe to the ground or negative 7 Note that some of the DC voltage signals are pulse will give continuously variable readings 8 If it is necessary to check the indoor unit board you must start by disconnecting the main power 9 Next remove the front cover of the unit and then control box cover 10 Carefully remove the indoor board from the control box place it face up on a plastic surface not metal 11 Reconnect the main power and repeat steps 5 6 and 7 12 Disconnect main power before reinstalling board to avoid shock hazard and board damage 421 08 9300 00 SERVICE MANUAL Duct Free Split System High Wall DFSA A H DFC4 A H 3 DFFA A H H CHART 1 INDOOR FAN SPEED OUT OF CONTROL Reset main power and restart system using remote Problem persists No further action is required Check motor connection Connection good Pes eonnection Check IFM output and input No on indoor board Replace indoor board Values good Replace indoor fan motor CHART 2 TEMPERATURE SENSOR Besa nalnipowel salle No further action is required restart system using remote Problem persists Yes Check sensor connector at ID or OD board Connection good Fix connection Yes Check input and output Replace board on indoor or outdoor board Yes Check sensor resistance Appendix 6 Replace sensor Yes Double chec
13. 00 890 3n78 QuvOS TOYLNOD YOOGNI 891 NMOS 3WVN Luvd 3009 s10 LNOD SWVH5VIG 5NIBHIA 421 08 9300 00 Specifications subject to change without notice q 1 SERVICE MANUAL Duct Free Split System High Wall DFS4 A H DFC4 A H 3 DFFA A H H REFRIGERATION CYCLE DIAGRAM CAPILLARY TUBE SERVICE VALVE HEAT HEAT EXCHANGER EXCHANGER EVAPORATOR CONDENSER SERVICE VALVE W GUAGE PORT SUCTION LINE PIPING A08104 Fig 6 Cooling INDOOR UNIT OUTDOOR UNIT lt FLARE CONNECTION CHECK VALVE i HEATING MODEL ONLY TWO PHASE CAPILLARY TUBE SERVICE VALVE 4 COOLING COMPRESSOR sepa 4 HEATING PIPING HEAT HEAT EXCHANGER EXCHANGER EVAPORATOR CONDENSER SERVICE VALVE W GUAGE PRT SG DISCHARGE Y EL REVERSING VALVE FLARE CONNECTI N ACCUMULATOR NL A08105 Fig 7 Heat Pumps 15 Specifications subject to change without notice 421 08 9300 00 SERVICE MANUAL REFRIGERANT LINES General refrigerant line sizing 1 Special The DFC4 A H units are shipped with a full charge of R410A refrigerant All charges line sizing and capacities are based on runs of 25 ft 7 6 m For runs over 25 ft 7 6 m consult long line section on this page for proper charge adjustments Minimum refrigerant line length between the indoor and outdoor units is 10 ft 3 m Refrigerant lines should not be bu
14. 09330 S10 QHVO8 AVIdSId 80 YOSNSS LNAYYND 59 AY 134 YOSSAYdWOD 49 YOLIANNOD Nd 3 d05538HdWOO dWOO HOLllI9VdVO NVJ 4000100 cdv YOLIOVdVO YOSSAYdWOO LdVO Q4VO8 IOYLNOD 3000100 820 QdvO8 IOYLNOD YOOCNI 89I 3WAVN L13Vd 3009 90 39Vl110A M07 LINN YOQANI S1 LNOD SWVH5VIG 5NIBHIA 13 Specifications subject to change without notice 421 08 9300 00 DFS4 A H DFC4 A H 3 DFFA A H H Duct Free Split System High Wall SERVICE MANUAL VLMZLHHtHJG 8EMZLEHUOAG wesbeiq Buin VAc LHH 44A LINN 8OOQNI WNOSIS LINN 800QONI 290 39V110A M07 3l Hl 8PMcIEHYOJG N 40001n0 3LIHM 39v 18 n8 UO 5v18 WOSN3S dW3l uIV ZS HOSN3S dW3l 1102 1S1 30018 TWNINH3I 81 YOLON d3dd3lS WS YOLOSNNOD NId d gt YOLOW NYA YOOaLNO W40 09 1 811 z 3en4 4 Alddf S WN3MOd D YOLON NY4 YO0QNI W41 m Quvo8 Av d510 gd HOSN3S 1N3HH2 SO A AV13H HOSS3udNOO 49 e z U0193NNOO 9nd NO 2 e HOSS3HdWOO dHO2 D uOllOVdv9 NY4 Y0001N0 2dV2 SmS xowg HOllOVdVO MOSS3HdNOO L dvd g QHVOB TYXLNOD u00Q1
15. 2 80 325 9 06 230 55 0 25 DIMENSIONS OUTDOOR Air Flow lt M I A07337 W H L1 L2 L3 Weight Ib kg Weight Ib kg Model Size in mm in mm in mm in mm in mm Cooling Only Heat Pumps 9K 30 71 780 21 26 540 21 61 549 11 81 300 10 87 276 77 0 85 79 2 86 12K 29 92 760 23 23 590 20 87 530 12 40 315 11 42 290 85 8 39 90 2 41 18K 33 07 840 27 36 695 22 05 560 14 17 360 13 19 335 125 4 57 125 4 57 24K 31 16 893 33 86 860 23 11 588 13 98 355 13 11 833 159 5 72 160 6 73 SERVICE VALVE LOCATIONS 9K 12K 18K 24K k I us K i K A07376a i 9K 12K 18K 24K Service Valve Locations in mm in mm in mm in mm J 3 46 88 3 19 81 3 46 88 4 02 102 K 3 46 88 5 63 143 3 62 92 6 57 167 421 08 9300 00 Specifications subject to change without notice 6 SERVICE MANUAL Duct Free Split System High Wall DFS4 A H DFC4 A H 3 DFFA A H H CLEARANCES INDOOR 6 15m min A07891 Fig 2 Indoor unit clearance CLEARANCES OUTDOOR Air inlet A07894 Fig 3 Outdoor Unit Clearance UNIT 9k and 12k in mm 18k and 24k in mm A 24 610 24 610 B 24 610 36 914 C 24 610 24 610 D 4 102 12 305 E 12 305 12 305 7 Specifications subject to change without notice 421 08 9300 00 SERVICE MANUAL SYSTEM OPERATING ENVELOPE Indoor Temps aue
16. A A H H CHART 9 UNIT NOT RUNNING OPTIMALLY HP IN HEATING Visually check outdoor Check reversing valve Unit for ice blockage Go to flow chart 12 Check defrost sensor Ok Go to flow chart 2 Replace sensor Check application limits Ok Beyond operating range Check ambient conditions Prime icing Explain to customer To supplement flow chart 8 Check for blockage on outdoor coil and drain pan Are the holes in drain pans blocked A08184 CHART 10 COMPRESSOR No fix connection Trace connections from OD board Connections ok Yes Check contactor Contactor ok Replace contactor Yes Check capacitor Capacitor ok Replace capacitor Replace compressor Yes Check compressor windings Ok No Compressor ok For size 9 and 12k units contactor is on outdoor board Check contactor output on outdoor board if not done already If bad replace outdoor board A08171 421 08 9300 00 Specifications subject to change without notice 28 SERVICE MANUAL Duct Free Split System High Wall DFS4 A H DFC4 A H 3 DFFA A H H CHART 11 OUTDOOR MOTOR Visually confirm that fan No blades and outdoor coil Clear blockage are not blocked np Yes Trace connections from No OD board Connections ok Fix connection Yes Check capacitor Capacitor ok Replace capacitors Yes Check motor windings Replace motor Ok Yes Motor ok A08172 CHAR
17. A08107 Fig 18 Auto Fan Cooling Mode Sleep Mode When in cooling mode additional energy savings can be realized by selecting the Sleep setting When the Sleep setting is selected the temperature set point is adjusted automatically as shown below Set point gt Time hour A08108 Fig 19 Sleep Mode The unit will shut off 7 hours after the Sleep Mode is selected Turbo Mode When in cooling mode selecting Turbo will allow the indoor unit to satisfy the temperature set point as quickly as possible In Turbo Mode the indoor fan will shift to high speed and either run continuously for 20 minutes or until the user pushes the Turbo button again at which point the fan speed will return to the original setting Heating Mode In this mode the system heats the room air with the indoor fan running at either the selected speed or on Auto As in the cooling mode the indoor fan will run continuously unless interrupted by the cold blow algorithm This algorithm will not allow the fan to run if the indoor coil temperature drops below a preset value The sleep function can be selected while the unit is running in the Heating Mode Defrost is controlled by the on board microprocessor Specifications subject to change without notice 20 SERVICE MANUAL Compressor and Fan Operation The compressor and outdoor fan cycle on and off based on the actual room temperature versus the set point as shown below Whe
18. CE MANUAL Duct Free Split System High Wall DFS4 A H DFC4 A H 3 DFFA A H H SPECIFICATIONS COOLING ONLY OudoorindoorModelSize DFsaas cone ane vex aka Charge 23 29 44 9 i 4 4 1 55 Indoor Sound Rating Outdoor Sound Rating dBA lvo LS IL 289 Liquid Line Connection Size in Vapor Line Connection Size in 1 2 1 2 2 4 4 53 7 18 Maximum Vertical Separation ft Em Maximum Line set Length ft 65 1 Factory Charge R 410A Ibs 2 044 ta Net Weight Outdoor Lbs Kg 70 5 32 79 4 36 150 68 Net Weight Indoor Lbs Kg 17 6 8 25 4 11 5 39 7 18 A series models 1 2 2 ton offer low ambient kit as an accessory OUTDOOR ELECTRICAL DATA Min Max Voltage Oper Oper come Volts Volts Maximum Vertical Separation ft Indoor Lower than Outdoor 65 4 35 Indoor Higher than Outdoor 35 3 5 4 5 5 5 9 DFC4A309J1B oroare n6 104 ver 99 a7 tba tba INDOOR ELECTRICAL DATA Min Oper Max Oper weds voege MRE MRR Fana MCA DFF4AHO9J1A S5DC tba DFF4AH18K1A _ 208 230 1 60 tba DFF4AH24K1A 208 230 1 60 tba 421 08 9300 00 Specifications subject to change without notice 4 SERVICE MANUAL Duct Free Split System High Wall DFS4 A H DFC4 A H 3 DFFA A H H SPECIFICATIONS HEAT PUMP ONLY _Outdoorindoor Model Size DFsans cone ane teks zka mam o S o 3s 3 o a L oaoa
19. E10 149 63 158 70 TE11 131 55 149 65 19 Specifications subject to change without notice Duct Free Split System High Wall DFS4 A H DFC4 A H 3 DFF4 A H H Indoor High Temperature Protection High indoor coil temperature in heating mode can occur due to any of the following High outdoor ambient temperature Indoor fan blocked Indoor coil blocked including dirty filters The indoor coil thermistor on a heat pump unit continuously monitors the temperature of the indoor coil during heating operation Anytime the coil temperate exceeds the TE8 limit the outdoor fan is switched off If the coil temperature continues to climb and exceeds the TE7 limit the compressor is switched off When the coil temperature drops below the TE9 limit the compressor and outdoor fan are switched back on as shown below Compressor on Fan off T temp down T temp up Compressor off Fan off Compressor on Fan on TE9 TE8 TE7 T A08120 Fig 15 Indoor High Temperature Protection Parameter Condenser mo Temp DFC4 A H DFCA AIH DFCA AIH DFCA AIH Parameter jp 312J1B 318K1B 324K1A TE7 140 60 140 60 145 63 145 63 TE8 129 54 129 54 129 54 129 54 TE9 118 48 118 48 122 50 122 50 421 08 9300 00 SERVICE MANUAL SEQUENCE OF OPERATION Interface A wireless remote control supplied with the unit is the interface between the fan coil
20. High Wall DFS4 A H DFC4 A H 3 DFF4 A H H Deep Vacuum Method The deep vacuum method requires a vacuum pump capable of pulling a vacuum of 500 microns and a vacuum gage capable of accurately measuring this vacuum depth The deep vacuum method is the most positive way of assuring a system is free of air and liquid water See Fig 17 LEAK IN SYSTEM VACUUM TIGHT TOO WET TIGHT DRY SYSTEM 0 1 2 3 4 5 6 7 MINUTES A95424 Fig 10 Deep Vacuum Graph Triple Evacuation Method The triple evacuation method should only be used when vacuum pump is only capable of pumping down to 28 in of mercury vacuum and system does not contain any liquid water Refer to Fig 18 and proceed as follows 1 Pump system down to 28 in of mercury and allow pump to continue operating for an additional 15 minutes 2 Close service valves and shut off vacuum pump 3 Connect a nitrogen cylinder and regulator to system and open until system pressure is 2 psig 4 Close service valve and allow system to stand for 1 hr During this time dry nitrogen will be able to diffuse throughout the system absorbing moisture 5 Repeat this procedure as indicated in Fig 18 System will then be free of any contaminants and water vapor EVACUATE BREAK VACUUM WITH DRY NITROGEN WAIT EVACUATE BREAK VACUUM WITH DRY NITROGEN WAIT EVACUATE v CHECK FOR TIGHT DRY SYSTEM IF IT HOLDS DEEP VACUUM RELEASE CHARGE INTO SYSTEM Fig 11 Trip
21. RICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death Before installing modifying or servicing system main electrical disconnect switch must be in the OFF position There may be more than 1 disconnect switch Lock out and tag switch with a suitable warning label INTRODUCTION Section 1 of this Service Manual provides the necessary information to service repair and maintain the Duct Free Splits with R410 A air conditioners and heat pumps Section 2 of this manual is an appendix with data required to perform troubleshooting Use the Table of Contents to locate a desired topic 421 08 9300 00 April 2008 SERVICE MANUAL Duct Free Split System High Wall DFSA A H DFC4 A H 3 DFFA A H H DUCT FREE SPLIT SYSTEM MODEL NUMBER IDENTIFICATION GUIDE OUTDOOR DFC Duct Free Condenser DFS Duct Free System 4 Environmentally Sound R 410A REFRIGERANT A Air Conditioner H Heat Pump NAMEPLATE SEER 09 9 000 BTUH ton 12 12 000 BTUH 1 ton 18 18 000 BTUH 17 tons 24 24 000 BTUH 2 tons NOMINAL CAPACITY J 115 1 60 K 208 230 1 60 SUPPLY VOLTAGE 1 Single Zone 2 Dual Zone 3 Tri Zone SALES CODE FEATURES Sales Code DUCT FREE SPLIT SYSTEM MODEL NUMBER IDENTIFICATION GUIDE INDOOR DFF Duct Free Fan Coil DFS Duct Free System 4 Environmentally Sound R 410A REFRIGERANT A Air Conditioner H Heat Pump H High Wall U Under Ceiling C Cassette
22. Service Manual DUCT FREE SPLIT SYSTEM R 410A HIGH WALL DFSA A H System DFCA A H 3 Outdoor DFFA A H H Indoor TABLE OF CONTENTS PAGE SAFETY CONSIDERATIONS 0000 0 0008 1 MODEL NUMBER INDENTIFICATION GUIDE 2 STANDARD FEATURES AND ACCESSORIES 3 SPECIFICATIONS COOLING ONLY sess 4 SPECIFICATIONS HEAT PUMP UNITS 5 DIMENSIONS coc dh re esr mee e e beer eet eds 6 SERVICE VALVE LOCATIONS 00 00 20 e ee 6 CLEARANCES dex aet enes Saag i cane 7 SYSTEM OPERATING ENVELOPE 8 ELECTRICAL DATA 0 8 WIRING 2 oiii eibi iets dae kde eer Abby bie 9 CONNECTION DIAGRAMS 0000 00 0 cece 9 WIRING DIAGRAMS ssssssssssenesh 10 14 REFRIGERATION CYCLE DIAGRAM 15 REFRIGERANT LINES 02 eee eee 16 SYSTEM EVACUATION AND CHARGING 17 CONTROL SYSTEM amp SYSTEM SAFETIES 18 3 MINUTE TIME DELAY 0 0 000 0008 18 COMPRESSOR OVERCURRENT PROTECTION 18 19 SEQUENCE OF OPERATION 00 0005 20 MODES OF OPERATION sssssss n n nnn 20 22 TROUBLESHOOTING 0 00 0c eee 23 34 Specifications subject to change without notice SAFETY CONSIDERATIONS Improper installation adjustment alteration service maintenance or use can cause explosion fire electrical shock or oth
23. T 12 REVERSING VALVE Check RV connection on Clean or repair the outdoor board Ok connection Check RV output on outdoor board Ok Replace outdoor board Check RV solenoid Ok Replace solenoid Replace reversing valve 29 Specifications subject to change without notice 421 08 9300 00 SERVICE MANUAL Duct Free Split System High Wall DFSA A H DFC4 A H 3 DFFA A H H CHART 13 RECEIVER BOARD Check wiring and connection between receiver and ID board Ok Fix wiring or connection Check input and output on ID and receiver Replace receiver board boards Ok Replace remote control 421 08 9300 00 Specifications subject to change without notice 30 A08173 SERVICE MANUAL Duct Free Split System High Wall DFS4 A H DFC4 A H 3 DFFA A H H A1 DFS4A309J1B DFS4A312J1B DFC4A309J1B DFC4A312J1B CONTROL BOARD CONNECTOR INPUT or OUTPUT VALUE CN2 OUT Pin 1 Pulse 0 to 12 Volts DC Pin2 35x2 Volts DC Pin 3 GND Pin 4 13x4 Volts DC all relative to Pin 3 CN3 OUT Neutral CN4 IN Neutral CN9 OUT L 115 Volts AC CN10 IN L115 Volts AC P1 GND P2 GND DFF4AH09J1A DFF4AH12J1A CONTROL BOARD CONNECTOR INPUT or OUTPUT VALUE CN1 IN 0 5 Volt DC CN2 IN 0 5 Volt DC CN3 Pulse drive output 0 17 Volts DC Pin 5 GND All other Pins are 0 to 17 Volt DC All relative to Pin 5 CN5 Power Output Pin 1 GND Pin 2 5 Volts DC Input Pin 3 Pulse 0 t
24. al between the outdoor unit and indoor unit Voltage drop on the connecting cable should be kept to a minimum Use cable size and max length below 18 AWG 50 ft 16 m 16 AWG 100 ft 33 m CONNECTION DIAGRAMS 208 230 1 60 FIELD POWER SUPPLY CONNECTING CABLE OUTDOOR TO INDOOR GND MAIN POWER TO INDOOR SUPPLY JM CONTRO sper CONTROL 208 230 1 60 18K amp 24K OUTDOOR UNIT 18K amp 24K INDOOR UNIT 115 1 80 FIELD POWER SUPPLY CONNECTING CABLE OUTDOOR TO INDOOR st Nee es 8 Iie As BESRUNCHUNCNUNENI NIT I MAIN POWER INDOOR U INDOOR UNIT SUPPLY SIGNAL SIGNAL Sk amp 12K 115V OUTDOOR UNIT SK amp 12K INDOOR UNIT Notes 1 Do not use thermostat wire for any connection between indoor and outdoor units 2 All connections between indoor and outdoor units must be as shown The connections are sensitive to polarity 3 On the 18k and 24k units the S terminal CONTROL output is pulse DC with a potential AC voltage shock hazard A07654 Fig 5 Connection Diagrams 9 Specifications subject to change without notice 421 08 9300 00 DFS4 A H DFC4 A H 3 DFFA A H H Duct Free Split System High Wall SERVICE MANUAL VI P60HVrdJG LINA YOOUN VIf 60HVt34Q g8LP60 Vt23Q webera Bul TWNOTS LINN HOOQNI O
25. and the user The wireless remote control has the following characteristics e Capable of displaying C and F with C being the default setting To change the default setting refer to the Owner s Manual or push the recessed F C button once using a paper clip or similar object The remote control setpoint range is from 62 F 17 C to 88 F 30 C in increments of 2 F 1 C There is a dedicated cooling only and heat pump remote control The wireless remote control has an operating range of 25 ft 7 62 m The same remote control can be used to control more than one unit e f the remote control is lost damaged or the batteries are exhausted the system can be operated by using the manual button forced Auto located under the front panel Manual button A07364 Fig 16 Manual Button Location on Unit Onunits produced during week 12 2008 and later Units produced before week 12 have dedicated C or F controls MODES OF OPERATION The units have 5 main operating modes 1 Fan Only 2 Cooling 3 Heating heat pumps only 4 Auto 5 Dehumidification Dry The units have 2 other modes manual operation that are operated in unique situations 1 Auto Forced Mode Emergency 2 Test Mode Fan Mode Only In this mode the system circulates the room air without changing the room air temperature Cooling Mode In this mode the system cools and dries the room air with the fan running continuousl
26. d 39V170A M01 09 1 SLI AlddNS S3MOd 3l il garrfeoevvoAad INA YOOdLAO HM cdv r 3LIHM 9 Ea SLITHM 3n 18 9 A lt gt pras U C P m a qu Hh YOSNAS dW3l MIV ZSL YOSNSS dW3l 1102 Si 39019 IYNIWY3L 8l YOLOW J3dd3lS 5 YO LOANNOO d d 4010 v3 YOOdLNO 3O 35nd d YOLOW NY4 S000NI dI qdvOg AVIdSIG 80 YOSNAS IN3JH 02 SO AV 134 YOSSAYdWOD 832 YOLOANNOO 9flld 3 YOSSAYdWOD dWO2 YOLIOVdVO NY4 40001n0 cavo JOLIOVdvO 40553HdWOO ldVv2 Qdvog8 lOJINOO YOOGLNO 820 Q4VO8 1OHINOO YOOONI 99I JAVN LuVd 3009 30 39V1 0A MOI LINN SOOQNI SINVH9ViIG SNISIA 421 08 9300 00 Specifications subject to change without notice o 1 DFS4 A H DFC4 A H 3 DFFA A H H Duct Free Split System High Wall SERVICE MANUAL VLMZLHVUHJG g EMZLEVEOAG wesbeiq Buin Vie LHVvssd L E N YOOUN TWNOTS LINN Y000N1 30 39V110A M01 3L glyzclevrodad LINN YOOULNO l 9 4 ui
27. door and outdoor units Fix connection or Notes replace wiring When unit is operating normally and a DC voltage reading is taken between the S and G terminal on the outdoor unit or indoor unit positive and negative readings will Reset main power and fluctuate between 0 and 24V DC restart system using remote Problem persists No further action is required If indoor board is bad only a positive readings will be registered between terminals S and G on the outdoor unit The reverse will apply if outdoor board is bad Measure VDC reading on only negative readings will register outdoor between S and G Replace outdoor board Above data is obtained by having the red Reading positive probe of the meter on the S terminal and the black probe on the G terminal Replace indoor board Make sure wires are connected per connection diagrams i e L1 to L1 and L2 to L2 Failing to do that will result in a communication error There is a 2 to 3 minute window to take measurements before the diagnostic light is on again A08183 421 08 9300 00 Specifications subject to change without notice 26 SERVICE MANUAL Duct Free Split System High Wall DFS4 A H DFC4 A H 3 DFFA A H H CHART 7 UNIT NOT RUNNING NO DIAGNOSTIC CODE No Reset circuit breaker Is unit No running Yes Problem solved Use auto forced function Unit runs Reset remote and restart the unit Is unit running Check batteries OK
28. e auto fan setting T temp up Set fan speed Low Speed Ultra Low Speed T temp down Coil temp Fan off gt TE4 TE1 TE3 TE2 T A08111 Fig 22 Manual Indoor Fan Heating Mode Parameter Indoor Coil Temperature F C Parameter DFC4H DFC4H DFC4H DFC4H 309J1B 312J1B 318K1B 324K1A TE1 88 31 88 31 77 25 82 28 TE2 93 34 91 33 90 32 93 84 TES 86 30 81 27 86 30 90 32 TE4 72 22 68 20 68 20 75 24 21 Specifications subject to change without notice Duct Free Split System High Wall DFS4 A H DFC4 A H 3 DFF4 A H H Sleep Mode When in heating mode additional energy savings can be realized by selecting the Sleep setting When the Sleep setting is selected the temperature set point is adjusted automatically as shown below A Set Point gt Time hour A08110 Fig 23 Sleep Mode Heating The unit will shut off 7 hours after the Sleep mode is selected Defrost Defrost on heat pump units is controlled by the microprocessor and is initiated if either of the following conditions occur 1 The outdoor coil temperature is lower than 32 F 0 C for more than 40 minutes and during that period the coil temperature is continuously lower than 26 6 F 3 C for 3 minutes 2 If the first condition does not occur within 90 minutes of termination of the last defrost cycle The defrost cycle wil
29. e control is calling for heating or cooling Overcurrent protection can result due to any of the following e The ambient temperature is to high e Locked rotor on the compressor e Blockage in refrigeration circuit cap tubes for example e Outdoor air is blocked or restricted The compressor current is monitored continuously and protection is provided as shown below 3 sec Current down Compressor off after 3 seconds 5 min Compressor off Current up after 5 minutes 1 sec Outdoor fan off heating Normal Indoor fan low Indoor fan On speed cooling compressor On outdoor fan On A08117 Fig 12 Compressor Overcurrent Protection If the compressor is stopped 4 times at the 5 minute limit or 1 time at the 3 second limit the system will be locked off and the main power will have to be reset before the system can be restarted Time Limit Compressor Current DFC4 A H 309J1B DFC4 A H 312J1B DFC4 A H 318K1B DFC4 A H 324K1B 3 SEC 14A 18A 14A 23 A 5 MIN 12A 16A 12A 21A I SEC 10 5A 14A 11A 18A NORMAL 9A 12 5A 10A 16A 421 08 9300 00 Specifications subject to change without notice 18 SERVICE MANUAL Indoor Coil Freeze Protection The indoor coil can freeze due to any of the following Low system charge Reduced indoor airflow Restricted refrigerant flow Low ambient temperature outdoor Low load indoor In cooling mode the thermistor located on a return bend of the indoor coil
30. er conditions which may cause death personal injury or property damage Consult a qualified installer service agency or your distributor or branch for information or assistance The qualified installer or agency must use factory authorized kits or accessories when modifying this product Refer to the individual instructions packaged with the kits or accessories when installing Follow all safety codes Wear safety glasses protective clothing and work gloves Use quenching cloth for brazing operations Have fire extinguisher available Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the unit Consult local building codes and National Electrical Code NEC for special requirements Recognize safety information This is the safety alert symbol A When you see this symbol on the unit and in instructions or manuals be alert to the potential for personal injury Understand these signal words DANGER WARNING and CAUTION These words are used with the safety alert symbol DANGER identifies the most serious hazards which will result in severe personal injury or death WARNING signifies hazards which could result in personal injury or death CAUTION is used to identify unsafe practices which may result in minor personal injury or product and property damage NOTE is used to highlight suggestions which will result in enhanced installation reliability or operation A WARNING ELECT
31. in2 35x2 Volts DC Pin 3 GND Pin 4 18x4 Volts DC all relative to Pin 3 31 Specifications subject to change without notice 421 08 9300 00 SERVICE MANUAL Duct Free Split System High Wall DFSA A H DFC4 A H 3 DFFA A H H A5 DFS4A318K1B DFC4A318K1B CONTROL BOARD CONNECTOR INPUT or OUTPUT VALUE CN1 IN 14 5 5V Volts AC CN3 Pulse Signal 0 to 24 Volts DC Relative to ground CN4 IN L1 208 230 Volts AC CN5 IN L2 208 230 Volts AC CN6 OUT 208 230 Volts AC CN8 OUT 208 230 Volts AC DFF4AH18K1A CONTROL BOARD CONNECTOR INPUT or OUTPUT VALUE CN1 IN 11 043 Volts AC Pin 1 to Pin2 9 52 Volts AC Pin 3 to Pin 4 CN2 OUT IFM Capacitor Terminal 1 CN4 OUT IFM Capacitor Terminal 2 CN5 OUT 208 230 Volts AC CN6 OUT 208 230 Volts AC Pin 1 to Pin 2 Pin 1 to Pin 3 Pin 1 to Pin4 CN7 IN 0 5 Volt DC Not including OV and 5V CN8 IN 0 5 Volt DC Not including OV and 5V CN9 OUT Pin 1 Ground Pin 2 5 Volts DC IN Pin 1 Ground Pin 3 0 to 5 Volts DC Pulse relative to Pin 1 CN10 OUT Pin 1 Ground Pin 2 Pin 5 0 to 5 Volts DC Pulse relative to Pin 1 CN11 OUT Pin 5 Ground all other Pins are 0 to 17 Volts DC Pulse relative to Pin 5 CN12 Two way signal 0 to 24 Volts DC Pulse relative to Ground P1 IN L1 208 230 Volts AC P2 IN L2 208 230 Volts AC INDOOR UNIT DISPLAY BOARD CONNECTOR INPUT or OUTPUT VALUE CN1 IN Pin 1 Ground Pi
32. k connection for corrosion or high resistance 421 08 9300 00 Specifications subject to change without notice A08166 A08167 24 SERVICE MANUAL Duct Free Split System High Wall DFS4 A H DFC4 A H 3 DFFA A H H CHART 3 COMPRESSOR OVERCURRENT PROTECTION Is unit running in outdoor ambient higher than 125 F Beyond operating range Clean coil Outdoor coil clean Problem persists Problem solved Yes Yes Check connections from Yes Clean repair connection Problem solved oD board Corrosion or Problem persists high resistance No Yes Outdoor fan Ok Change outdoor motor Yes Connect gauges to unit i High head high suction pressures ok High head low suction Yes Yes Yes Check amp draw to Unit is overcharged compressor Values within Reclaim charge and weigh range in correct charge Restriction in refrigeration Replace compressor circuit Yes Replace outdoor board A08168 CHART 4 INDOOR UNIT COMMUNICATION ERROR SIZE 9K AND 12K F Notes Check the uei ang Fix connection or poe eee replace wiring Before measuring the Volts DC on outdoor TB ndoor and outdoor units disconnect the field wire on terminal 1 Before measuring the Volts DC on Indoor TB Resetmain bower and disconnect the field wire on terminal 1 restart system oh remote MOTUS atomis PUE eto required Have the red probe of the meter on terminal 1 p and the black probe o
33. l terminate 10 minutes after initiation or when the coil temperature reaches 68 F 20 C At the end of the Defrost cycle the timer resets automatically The cycles of defrost algorithm are shown below Defrost 10 or 6 minutes Compressor Dn 5 i 25 oft i i 55 TRE 4 way valve o gt lt 2s Outdoor fan EE p 5 Indoor fan m A08114 10s gt lt Fig 24 Defrost Cycle Auto Mode When the Auto setting is selected the microprocessor looks at the difference between the room temperature T and the set point TS The algorithm determines which mode the unit will run in as shown below Heating fan only in cooling Fan only Cooling 1 8 F 3 6 F T TS A08115 Fig 25 Auto Mode When the unit shifts modes it will remain in that mode for at least 15 minutes while the algorithm ignores the difference between T and TS This ensures that the unit cannot change modes too frequently 421 08 9300 00 SERVICE MANUAL Dry Dehumidification Mode When more humidity control is desired the Dry setting can be selected Lower humidity is achieved when the microprocessor adjusts the indoor fan speed and compressor cycling by comparing the room temperature T and the set point temperature TS There are two different control algorithms Size 9k and 12 k units T TS 3 6 the compressor will run for 6
34. le Evacuation Method Final Tubing Check IMPORTANT Check to be certain factory tubing on both indoor and outdoor unit has not shifted during shipment Ensure tubes are not rubbing against each other or any sheet metal Pay close attention to feeder tubes making sure wire ties on feeder tubes are secure and tight 1 A95425 421 08 9300 00 SERVICE MANUAL Duct Free Split System High Wall DFSA A H DFC4 A H 3 DFFA A H H CONTROL SYSTEM The DFF4 unit is equipped with a microprocessor control to perform two functions 1 Provide safety for the system 2 Control the system and provide optimum levels of comfort and efficiency The main microprocessor is located on the control board of the fan coil unit outdoor units have a microprocessor too with thermistors located in the fan coil air inlet and on the indoor coil Heat pump units have a thermistor on the outdoor coil These thermistors monitor the system operation to maintain the unit within acceptable parameters and control the operating mode SYSTEM SAFETIES Cooling Only Heat Pump Seta 09K 12K 18K 24K 09K 12K 18K 24K 3 Min Time Delay X X X X X X X X Over Current Protection On Compressor X X X X X X X X Indoor Coil Freeze Protection X X X X X X X X Condenser High Temperature Protection X X X X Indoor Evaporator High Temperature X X X X In order to protect the compressor there is a 3 minute delay on break even if th
35. llOVdVO HOSS3HdWOO LdVO QuvO8 IOYLNOD Y0001N0 890 QuvOB8 TIOHLNOD YOOGNI 891 3W4VN Luvd 3009 S o N En T 1 D o N o N E o T 1 o s g8IMSLeEVrOJG LINA dO00100 Q38 v8 OWE a34 v8 gay 35v8 aay Q34 Q34 CAV 3ng Q3H 39v18 10 LNOD SWVH5VIG 5NIBHIA 421 08 9300 00 Specifications subject to change without notice 12 DFS4 A H DFC4 A H 3 DFFA A H H Duct Free Split System High Wall SERVICE MANUAL VIP60HHrHJIQ LINN 8000NI VIf 60HHt34Q g8LP60 Hv23Q wesbeig Bunt TWNSIS LINN Y000N1 30 39V110A MOT YOSNSS dW3l NIV C51 YOSNSS dW3l 1100 151 39018 VNIWU3L 8l YOLOW H3dd3lS WS 3A VA 9NISH3A3H Ad 08 SII AlddfnS H3MOd 3l alr6e0 HvOsAd LINA 80001060 3LIHM aN 1a YO OWE Ad aN 18_ YO 32v 18 gt Pan U je m pel YOLOANNOOD Nid d O10 V4 YOOGLNO W40 3Sfd j YOLOW NY43 YOOONI Wal YOSNSS dW3l 15
36. minutes and the indoor fan will run at low speed The compressor will be off for 4 minutes and the indoor fan will run in ultra low speed TS T lt TS 3 6 The compressor will run for 5 minutes and the indoor fan will run at low speed The compressor will be off for 5 minutes and the indoor fan will run in ultra low speed T lt TS The compressor will run for 4 minutes and the indoor fan will run at low speed The compressor will be off for 6 minutes and the indoor fan will run in ultra low speed Size 18k and 24k units These units do not have ultra low speed When set for dehumidification the indoor fan runs at low speed and the compressor cycles based on the difference between T and TS Manual Operation The unit can be set for Forced Auto or Forced Cooling manually by pushing the Manual button once or twice as shown below Push 3 Times Push Once Push Twice Remote LL Forced _ Forced mode auto cooling E E Fig 26 Manual Operation A08116 421 08 9300 00 Duct Free Split System High Wall DFSA A H DFC4 A H 3 DFFA A H H Eorced Auto Emergency Operation Forced Auto option allows operation of the unit if the remote control is lost or the batteries have expired When the system is in Forced Auto it will run with a default set point of 75 2 F While in Forced Auto the system will respond to signals from the remote control Forced Cooling Operation This option is used
37. ms are equipped with diagnostic code display LED s on both the indoor and outdoor units The outdoor diagnostic display is an LED on the outdoor unit board and is limited to very few errors However it is useful in identifying special error codes like a failure of the outdoor coil sensor on heat pumps The indoor diagnostic display is a combination of flashing LED s on the display panel on the front of the unit If possible always check the diagnostic codes displayed on the indoor unit first The diagnostic codes for the indoor and outdoor units are listed in appendix A8 and A9 Problems may occur that are not covered by a diagnostic code but are covered by the diagnostic flow charts starting with the diagnostic hierarchy These problems will be typical air conditioning mechanical or electrical issues that can be corrected using standard air conditioning repair techniques 23 Specifications subject to change without notice Unit not running and no diagnostic code Go to chart 7 Unit running but not optimally Go to chart 8 amp 9 A08165 For problems requiring measurements at the control boards please note the following 1 Always disconnect the main power 2 When possible check the outdoor board first 3 Start by removing the outdoor unit top cover 4 Reconnect the main power 5 Probe the outdoor board inputs and outputs with a digital multi meter referring to the wiring diagrams and input output charts found in
38. n 2 5 0 to 5 Volts DC Pulse relative to Pin 1 CN2 IN Pin 1 Ground Pin 5 Volts DC OUT Pin 3 0 to 5 Volts DC Pulse relative to Pin 1 421 08 9300 00 Specifications subject to change without notice 32 SERVICE MANUAL Duct Free Split System High Wall DFSA A H DFC4 A H 3 DFFA A H H A6 Characteristics of Temperature Sensor Temp F C Resistance KQ Temp F C Resistance KQ Temp F C Resistance KQ 14 10 62 2756 62 6 17 14 6181 111 2 44 4 3874 15 8 9 58 7079 64 4 18 13 918 113 45 4 2126 17 6 80 56 3694 66 2 19 13 2631 114 8 46 4 0459 19 4 7 52 2438 68 20 12 6431 116 6 47 3 8867 21 2 6 49 3161 69 8 21 12 056 118 4 48 3 7348 23 5 46 5725 71 6 22 11 5 120 2 49 3 5896 24 8 4 44 73 4 23 10 9731 122 50 3 451 26 6 3 41 5878 75 2 24 10 4736 123 8 51 3 3185 28 4 2 39 8239 77 25 10 125 6 52 3 1918 30 2 1 37 1988 78 8 26 9 5507 127 4 53 3 0707 32 0 35 2024 80 6 27 9 1245 129 2 54 2 959 33 8 1 33 3269 82 4 28 8 7198 131 55 2 8442 35 6 2 31 5635 84 2 29 8 3357 132 8 56 2 7382 37 4 3 29 9058 86 30 7 9708 134 6 57 2 6368 39 2 4 28 3459 87 8 31 7 6241 136 4 58 2 5397 41 5 26 8778 89 6 32 7 2946 138 2 59 2 4468 42 8 6 25 4954 91 4 33 6 9814 140 60 2 3577 44 6 7 24 1932 93 2 34 6 6835 141 8 61 2 2725 46 4 8 22 5662 95 35 6 4002 143 6 62 2 1907 48 2 9 21 8094 96 8 36 6 1306 145 4 63 2 1124 50
39. n terminal 3 Reconnect wiring when measurements are complete Measure Volts DC on Measure Volts DC on Recheck wiri outdoor TB between 1 amp 3 indoor TB between 1 amp 3 echeck wiring and Ok Ok connections Replace outdoor board Replace indoor board Make sure wires are connected per connection diagrams Failing to do that will result in a communication error There is a 2 to 3 minute window to take the measurement before the diagnostic light is on again A08181 25 Specifications subject to change without notice 421 08 9300 00 SERVICE MANUAL Duct Free Split System High Wall DFSA A H DFC4 A H 3 DFFA A H H CHART 5 OUTDOOR UNIT PROTECTS Clean coil Problem Problem solved Outdoor coil clean persists Yes Check outdoor unit Yes Check sensors board Indicator light Flow Chart 2 flashing twice Connect gauges to Yes Check application unit Pressures ok limits High head high suction High head low Normal suction high head Suction and head equal suction Yes Yes Non condensables Unit is overcharged in sys Pump down Reclaim charge and See note below and recharge unit weigh in correct charge Check compressor Restriction in system Check capillary tube check for moisture and check for damage to liquid line between indoor and outdoor units A08182 CHART 6 INDOOR UNIT COMMUNICATION ERROR SIZE 18K AND 24K Check the wires and connections between In
40. n the compressor starts it will run continuously for 7 minutes even if the set point condition is satisfied The 4 way value is energized in heating and will stay energized for 2 minutes after the mode is changed into a non heating mode Compressor on outdoor fan off Room temp up Compressor off outdoor fan on Ts Ts 3 6 Ts 5 4 T T Room Temperature TS Set Point Temperature For 9k amp 12k Units Only For 18k and 24k units numbers will be 5 4 and 7 2 respectively A08109 Fig 20 Compressor and Outdoor Fan Heating Mode Room temp down Auto Fan When the fan speed is set to Auto the fan will run at either the medium or low speed based on the difference between the room temperature and the set point temperature as shown below Low Speed Room temp down Room temp up Med Speed gt T Room Temperature 9 3 6 F Ts Ts Set Point Temperature A08112 Fig 21 Auto Fan Heating Mode Manual Indoor Fan The indoor fan will run continuously in heating at the set fan speed even if the compressor cycles off unless the indoor coil temperature begins to drop When the coil temperature drops to the TES limit the 18k and 24k unit indoor fan switches to low speed On the 9k and 12k unit the indoor fan switches to ultra low speed When the coil temperature drops to the TE4 limit the indoor fan on all systems shuts off to prevent cold blow as shown below The cold blow algorithm also applies to th
41. o 5 Volts DC Output Pin 4 Pin 10 Pulse 0 to 5 Volt DC All relative to Pin 1 CN6 Out Pin 1 35 Volt DC Pin 2 Empty Pin 3 GND Pin 4 5 Volt DC Pin 5 Pulse 0 5 Volt DC IN Pin 6 Pulse 0 to 5 Volt DC All relative to Pin 3 G1 IN Pin 1 Pulse 0 to 12 Volts DC Pin2 35x2 Volts DC Pin 3 GND Pin 4 1344 Volts DC all relative to Pin 3 A2 DFS4H309J1B DFS4H312J1B DFC4H309J1B DFC4H312J1B CONTROL BOARD CONNECTOR INPUT or OUTPUT VALUE CN1 OUT Pin 1 GND Pin 2 5 Volts DC Pin 3 Empty IN Pin 4 0 to 5 Volts DC All relative to Pin 1 CN2 OUT Pin 1 Pulse 0 to 12 Volts DC Pin2 35x2 Volts DC Pin 3 GND Pin 4 13 4 Volts DC all relative to Pin 3 CN3 OUT Neutral CN4 IN Neutral CN5 OUT L 115 Volt AC CN6 OUT L 115 Volt AC CN10 IN L115 Volt AC P1 GND P2 GND DFFA4HH09J1A DFFA4HH12J1A CONTROL BOARD CONNECTOR INPUT or OUTPUT VALUE CN1 IN 0 5 Volt DC CN2 IN 0 5 Volt DC CNS3 Pulse drive output 0 17 Volts DC Pin 5 GND All other Pins are 0 to 17 Volt DC All relative to Pin 5 CN5 Power Output Pin 1 GND Pin 2 5 Volts DC Input Pin 3 Pulse 0 to 5 Volts DC Output Pin 4 Pin 10 Pulse 0 to 5 Volt DC All relative to Pin 1 CN6 Out Pin 1 35 Volt DC Pin 2 Empty Pin 3 GND Pin 4 5 Volt DC Pin 5 Pulse 0 5 Volt DC IN Pin 6 Pulse 0 to 5 Volt DC All relative to Pin 3 G1 IN Pin 1 Pulse 0 to 12 Volts DC P
42. ried in the ground If it is necessary to bury the lines not more than 36 in 914 mm should be buried Provide a minimum 6 in 152 mm vertical rise to the service valves to prevent refrigerant migration Both lines must be insulated Use a minimum of 1 2 in 12 7 mm thick insulation Closed cell insulation is recommended in all long line applications consideration should be given to isolating interconnecting tubing from the building structure Isolate the tubing so that vibration or noise is not transmitted into the structure The following maximum lengths are allowed Long Line Applications DFC4A Units 1 A crankcase heater should be added for line lengths longer than 25 ft 7 62 m to prevent the migration of refrigerant to the compressor during the OFF cycle 2 A field fabricated wind baffle is recommended 3 No change in line sizing is required 4 Add refrigerant per table below Duct Free Split System High Wall DFSA A H DFC4 A H 3 DFFA A H H ADDITIONAL CHARGE TABLE Total Line Length Additional Charge oz Unit Size ft 10 25 ft gt 25 65 ft gt 65 100 ft Min Max 3 95 762m 7 62 19 81m 19 81 30 48m 9K cool only 9K h 12K 3 I eR 0 1 coo 1 oz per only 10 none foot 12K hp 18K cool 0 1 oz per only 100 foot 5 Reduction in capacity due to long lines can be calculated from the chart below
43. triple evacuation method may be used if the procedure outlined below is followed Always break a vacuum with dry nitrogen SYSTEM VACUUM AND CHARGE Using Vacuum Pump 1 Completely tighten flare nuts A B C D connect manifold gage charge hose to a charge port of the low side service valve See Fig 15 Connect charge hose to vacuum pump Fully open the low side of manifold gage See Fig 16 Start vacuum pump Evacuate using either deep vacuum or triple evacuation method 6 After evacuation is complete fully close the low side of manifold gage and stop operation of vacuum pump 7 The factory charge contained in the outdoor unit is good for up to 25 ft 8 m of line length For refrigerant lines longer than 25 ft 8 m add 0 1 oz per foot of extra piping up to the maximum allowable length 8 Disconnect charge hose from charge connection of the low side service valve 9 Fully open service valves B and A 10 Securely tighten caps of service valves a wo I Outdoor Unit Refrigerant Indoor Unit L4A Low Side D B High Side Service Valve A07360 Fig 8 Service Valve Manifold Gage AQ g Low side valve Y 500 microns High side valve Charge hose Charge hose Vacuum pump amp Low side valve A07361 Fig 9 Manifold 17 Specifications subject to change without notice Duct Free Split System
44. y either at a selected fan speed or Auto fan speed The fan runs even when the compressor cycles off This feature enhances room comfort and efficiency of the system When the unit is operating in cooling two sub modes can also be selected 1 Sleep Mode is an energy saving feature that changes the set point automatically 2 Turbo Mode is a comfort feature on the 9k and 12k units where the set point is reached quickly by having the fan run on high speed regardless of the speed that has been selected Compressor and Outdoor Fan Operation The compressor and outdoor fan motor cycle on and off based on the conditions of the set point and the room temperature as shown below There is no minimum run time 421 08 9300 00 Duct Free Split System High Wall DFS4 A H DFC4 A H 3 DFFA A H H outdoor fan on Room temp down Room m Compressor and Compressor off 1 fan off T Room Temperature 0 1 8 F T Ts Ts Set Point Temperature A08106 Fig 17 Compressor and Outdoor Fan Cooling Mode Indoor Fan Operation When in cooling mode the fan runs continuously either at the chosen set speed or in Auto mode where the speed is determined by the microprocessor based on the difference between the room temperature and the temperature set point as shown below High fan Med fan Room temp up Room temp down Low fan 1 8 F 7 2 F 90 F T Ts T Room Temperature Ts Set Point Temperature
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