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Service Manual - DCNE Ductless and VRF

1. Permissible limits of the voltage range at which the unit will operate satisfactorily LEGEND FLA Full Load Amps MCA Minimum Circuit Amps RLA Rated Load Amps 12 WIRING All wires must be sized per NEC National Electrical Code or CEC Canadian Electrical Code and local codes Use Electrical Data table MCA minimum circuit amps and MOCP maximum over current protection to correctly size the wires and the disconnect fuse or breakers respectively Per caution note only copper conductors with a minimum 300 volt rating and 2 64 inch thick insulation must be used The use of BX cable is not recommended X CAUTION EQUIPMENT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation Wires should be sized based on NEC and local codes Use copper conductors only with a minimum 300 volt rating and 2 64 inch thick insulation Recommended Connection Method for Power and Communication Wiring Power and Communication Wiring The main power is supplied to the outdoor unit The field supplied 14 3 power communication wiring from the outdoor unit to indoor unit consists of four 4 wires and provides the power for the indoor unit Two wires are high voltage AC power one is communication wiring and the other is a ground wire Recommended Connection Method for Power and Communication Wiring To minimize communication wiring interferen
2. Yes Replace indoor or outdoor PCB No v Replace the sensor 42 E5 Voltage protection error diagnosis and solution Error Code E5 Malfunction decision conditions An abnormal voltage rise or drop is detected by checking the specified voltage detection circuit Supposed causes Power supply problems e System leakage or block e PCB faulty Troubleshooting Voltage protection v Check the voltage of outdoor unit power supply whether the voltage between L L1 and N L2 is about 18 253VAC No Yes v for 36KBtu h Y Check the power supply No Y Replace bridge rectifiers and then check whether the system can run normally Only for qua zone No E v Replace IPM board and then check whether the system can run normally Check whether the voltage of IPM board P and N is normal DC277 356V for 18 27KBtu h DC277 410V Yes No v Replace outdoor main board v Trouble IS solved 43 pu 7 88775 RE lt ut IPM for dual tri mir qp A9 7 zone IPM for qua zone P N for dual tri zone 44 P N for qua zone 45 bridge rectifier for dual tri zone bridge rectifier for qua zone 46 47 Remark Measure the DC voltage betwee
3. m L J m N T a Tee current loop Heater 2 communication E connect to compressor heater when heater is UN output 208 230V AC Rea Ree R89 Q HE Oe EE EH 8 power supply 8 208 230V AC Fuse 5A 250V connect to the terminal E pipe temp sensor 3234 ee connect to room temp sensor t rmp sensor NU CS mm Co high pressure sensor connect to high and low M onnect to earth ressure sensor p 8 low pressure sensor 0 gt Fuse T30A 250V i 8 B do 1524442 TO INVERTER ers 2 Ug e E test report connect to detector 208 230V AC connect to the terminal digital display button digital display 08 5 1 029 M o CN23 reserve ay 202302141806 FU KFR105W BP3T5N1 350S D 13 WP1 Fig 15 PCB Board Size 36 20 1 41 2012 12 18 R217 eal i 1 3 1ZVDC 2 3 5VDC 4 3 5VDC Pulse wave 5 3 5VDC Pulse wave 17UDC To PFC board U V W Connect to tha compressor voltage among phases 0 200VDOC 270 380VDC DC POWER To main board 16 O 8 5 lt En i Q 5 E P lt 5 B g nem Rss
4. Check the signal wire between the IPM module and the main Yes gt board is it connected good No Yes Reconnect and 15 error still display No y Replace IPM board and then check whether the Yes gt system can run normally No v Replace outdoor main board and then check whether the system can run normally No Y Y Replace M control gt Trouble is solved Yes 40 41 Remark Use a multimeter to test the DC voltage between black pin and white pin of signal wire The normal value should be around 5V Use a multimeter to test the DC voltage between black pin and red pin of signal wire The normal value should be around 12V E4 open or short circuit of outdoor temperature sensor diagnosis and solution F1 F2 F3 F4 F5 open or short circuit of indoor coil temperature sensor diagnosis and solution Error Code E4 F1 F2 F3 F4 F5 Malfunction decision conditions If the sampling voltage is lower than 0 06V or higher than 4 94V the LED displays the failure e Wiring mistake Supposed causes e X Sensor faulty e PCB faulty Troubleshooting Check the connections between temperature sensor and PCB Are the connections good Yes Check the resistance value of the sensor via Appendix 1 and Appendix 2 No Correct the connections
5. Condensate Pumps For High Walls and Floor Console Condensate Pump For Cassette and Ducted Crankcase Heater Basepan Heater 0070070 gt S Standard A Accessory INDOOR UNITS Fig 1 Condensate Pump Accessory On high wall fan coils the condensate pump has a lift capability of 12 ft 3 6 m on the discharge side with the pump mounted in the fan coil or 6 ft 1 8 m on the suction side if the pump is remote mounted The pump is recommended when adequate drain line pitch cannot be provided or when the condensate must move up to exit OUTDOOR UNITS Crankcase Heater Standard on all unit sizes Heater clamps around compressor oil stump COMBINATION TABLE Table 1 Combinations Table Size 18 Outdoor Model Outdoor Model Indoor Unit Nominal Unit Btuh Indoor Model Number Indoor Model Number Number Number Hiah Wall 9 000 40MAQBO9B 3 619PEQOO9BBMA x 12 000 40MAQB12B 3 619PEQ012BBMA Cassette 9 000 4 9 3 619REQ009CBMA 12 000 40MBQB12C 3 619REQ012CBMA 38MGQC18 3 538TEQ018RCMA Ducted 9 000 40MBQB09D 3 619REQ009DBMA 12 000 40MBQB12D 3 619REQ012DBMA 9 000 40MBQB09F 3 619REQ009FBMA Floor Console 12 000 40MBQB12F 3 619REQ012FBMA Table 2 Combinations Table Size 27 Outdoor Model Outdoor Model Indoor Unit Nominal Unit Btuh Indoor Model Number Indoor Model Number
6. Wiring Diagrams 18k Table 12 Outdoor Unit Control Board Size 18 CODE PART NAME CN18 CN19 CN22 Output PinS amp 6 12V Pinl Pin4 Pulse waveform 0 12V CN17 Input Pin3 4 SV Pin2 0V Pin1 Pin5 0 5V CN7 Input Pinl 0 5V Pin2 5V CN1 CN2 CN5 CN6 Output CN1 CN2 CN5 CN6 230VAC High voltage P1 P2 Output Connection of the high voltage CN3 CN4 Input 230VAC High voltage CN14 Input Pinl Pin3 0V Pin2 Pin4 0 5 P 1 P 2 Connection to the earth CN20 CN23 CN25 Output Pini Connection of the high voltage Pin2 Pin3 230VAC High voltage CN15 Input 1 3 5 5 Pin2 Pin4 Pin6 0 5 CN37 Output Pulse 0 320VDC for DC FAN CN38 Input Pinl Pin2 17VDC N OUT L OUT Output 230VAC High voltage CN21 input Pinl Pin3 12VDC Pin2 Pin3 SVDC Pin4 Pin3 0 5VDC Pin5 Pin3 0 5VDC CN39 Input 270 370VDC High voltage OUTDOOR UNIT IPM BOARD CNA4 CN5 Output 230VAC High voltage CN2 CN3 Connect to Reactor 270 370VDC CN6 Output Pinl Pin2 17VDC CN1 Output Pinl Pin3 12VDC Pin2 Pin3 5VDC Pin4 Pin3 0 5VDC Pin5 Pin3 0 5VDC CN11 CN12 Output 270 370VDC High voltage U V W Connect to compressor voltage among phases 0 200VAC 24 P INDOOR PIPE QUT TEMP OUTDOOR AMBIENT EE E TEMPERATURE SENSOR SIGH 13 COMDENSER TEMPERATURE SEMSOR OI SERIE E VALVE 3 VALVE ELECTRONIC a ENPAS
7. fei 66 20 gt 64 Temperature sensor checking Disconnect the temperature sensor from PCB measure the resistance value with a tester NING Temperature Sensors Room temp T1 sensor Indoor coil temp T2 sensor Outdoor coil temp T3 sensor Outdoor ambient temp T4 sensor Compressor discharge temp T5 sensor Measure the resistance value of each winding by using the multi meter 65 APPENDIX 1 TEMPERATURE SENSOR RESISTANCE VALUE TABLE C K C K Ohm C K Ohm C K Ohm C K Ohm 20 115 266 20 12 6431 60 2 35774 100 0 62973 19 108 146 21 12 0561 61 2 27249 101 0 61148 18 101 517 22 11 5000 62 2 19073 102 0 59386 17 96 3423 23 10 9731 63 2 11241 103 0 57683 16 89 5865 24 10 4736 64 2 03732 104 0 56038 15 84 2190 25 10 000 65 1 96532 105 0 54448 14 79 3110 26 9 55074 66 1 89627 106 0 52912 13 74 5360 27 9 12445 67 1 83003 107 0 51426 12 70 1698 28 8 71983 68 1 76647 108 0 49989 11 66 0898 29 8 33566 69 1 70547 109 0 48600 10 62 2756 30 7 97078 70 1 64691 110 0 47256 9 58 7079 31 7 62411 71 1 59068 111 0 45957 8 56 3694 32 7 29464 72 1 53668 112 0 44699 7 52 2438 33 6 98142 73 1 48481 113 0 43482 6 49 3161 34 6 68355 74 1 43498 114 0 42304 5 46 5725 35 6 40021 75 1 38703 115 0 41164 4 44 0000 36 6 13059 76 1 34105 116 0 40060 3 41 5878 37 5 87359 77 1 29078 117 0 38991
8. 4 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 Always break a vacuum with dry nitrogen SYSTEM VACUUM AND CHARGE Using Vacuum Pump Completely tighten all flare nuts and connect manifold gage charge hose to a charge port of the low side service valve See Fig 27 2 Connect charge hose to vacuum pump 3 Fully open the low side of manifold gage see Fig 28 4 Start vacuum pump 5 Evacuate using the 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 25ft 8 m of line length For refrigerant lines longer than 25ft 8 m add refrigerant as specified in the ADDITIONAL REFRIGERANT CHARGE table in this document 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 Outdoor Unit Refrigerant Indoor Unit Low Side D E A Side High Side Service Valve Fig 27 Service Valve Manifold Gage Q 500 microns O A High side valve Low side valve Charge hose gt Charge hose ee Vac
9. Yes Y Change Outdoor Main PCB Yes sindoor units number correct Che on the outdoor check point 2 for dual zone 3 for tri zone 4 for qua zone Refer PIC 4 Trouble is solved No second gt Change outdoor unit assembly include wiring totally 37 Pic 1 Use a multimeter to test the DC voltage between L2 port and S port of outdoor unit The red pin of multimeter connects with L2 port while the black pin is for S port When AC is normal running the voltage will move alternately between positive value and negative value Pic 2 IPM For dual tri zone 38 n o o IC pm 51 III y 30074 1 S00021DL Pic 2 IPM For qua zone PIC3 Main board LED when power on and unit standby PIC 4 Check point button press 1 time for check how many indoor units are connected 39 E3 Communication malfunction between IPM board and outdoor main board error diagnosis Error Code Malfunction decision conditions PCB main chip does not receive feedback from IPM module during 60 seconds e Wiring mistake e PCB faulty Supposed causes Troubleshooting Communication malfunction between IPM board and outdoor main board Is there at least one LED in the IPM board light v
10. 5 3 5U0C Pulse wave Fig 12 IPM Board Size 18 17 to MAIN BOARD CN33 connect to the compressor OUAC standby 10 20D0UAC lt running status light by Which you con Judge the unit Normal or Error usalsq Connect to Electric Expansion Valve e Open 2 Ap mol y ussisaq ii Rr Kim im t 07 connect to outdoor DC FAN 6 9 3 0 f5V DC speed feebaci cross We current CORNO 208 PA Den p __ connact CN9 CNB controled by relayer When 4 I DN output 208 230VAC connect to the heater When heater is DN output 209 230Y Fig 13 PCB Board Size 27 18 002000 B B A B BE u P coe 722252 Y 2023021 30890 CE KF QB0W 8P2T 4N1 3108 D 13 MP EON Ow 1 3 12VDC Connect to Ihe compressor 2 3 SDC voltage emong phases man board 4 3 5 0 Pulse weve 02000 5 3 SVDC Pulse wave Fig 14 IPM Board Size 27 19 DC DC pulse wave between 3 GND e 12V DC pulse wave between 2 GND DC pulse wave between 1 gt GND 12 DC pulse wave between 4 GND C Connect to the Indoor evap pipe out temp sensor gt T2B A T2B B T2
11. Fig 31 The red pin of multimeter connects with the L2 port while the black pin is for the S port When the AC is running normally the voltage will move alternatively between 50V to 50V If the outdoor unit has a malfunction the voltage moves alternatively with a positive value If the indoor unit has a malfunction the voltage will be a certain value Example 10 13VDC small fluctuating amounts indicates indoor unit malfunction Fig 31 DC voltage test Remark Use a multimeter to test the resistance of the reactor which does not connect with the capacitor Fig 32 The normal values should be around zero ohm Otherwise the reactor must have a malfunction and must be replaced Fig 32 Reactor resistance test 35 Zero crossing detection error diagnosis and solution E2 Error Code E2 Malfunction decision conditions When PCB does not receive zero crossing signal feedback for 4 minutes or the zero crossing signal interval is abnormal Supposed Causes Connection mistake PCB faulty Troubleshooting Check if the connections an No Correct the connections Turn on the power supply is normal unit when the power supply is good Yes Indoor main PCB is defective Replace indoor main PCB 36 El E2 Communication malfunction between indoor and outdoor units error diagnosis and solution Error Code E2 Indoor unit does not recei
12. Indoor Unit Ten Pawer Supp uid Groun d pa Es 1 1 1 ONNECTING CABLE ICONNECTING CABLE OUTDOOR TO INDOOR OUTDOOR TO BJSI dn door Un unia Unt Unt 208 230 1 60 230 1 60 208 230 1 60 CONNECTING CABLE ICONNECTING CABLE ICONNECTING CABLE OUTDOOR TO on OUTDOOR TO OUTDOOR TO A aa Banat m Power 10 Power Er Indoor Unit A 208 230 1 60 208 230 1 60 Fig 8 Connection Diagram Size 27 14 CONNECTION DIAGRAMS CONTINUED dE Supp co round 206239140 ICONNECTING CABLE CONNECTING CABLE CONNECTING CABLE ICONNECTING CABLE OUTDOOR TO INDOOR IOUTDOORTOINDOOR IOUTDOORTO OUTDOOR TO INDOOR I I 1 i I I LL 7TSZTNZTS CCID L1 B L2 B S B L1 C L2 C S C L1 D L2 D S D DOS Power to Indoor doo 208 230 160 208 230 1 60 19 Indoor Unit B da MC Unit Unt C _ Sina D Bun Se Indoor Unit A ee Unit DT Power Supp Power Supe Signal Indoor Unit E indoor gt E c Ground 208 230 1 60 208 230 140 7 111215 mS m P ion S 2 9 2151 I I e I I I I 1 I I 1 I I 1 I ICONNECTING CABLE CONNECTINGCABLE CONNECTING CABLE ICONNECTING CABLE ICONNECTING CABLE IOUTDOOR TO INDOORi IOUTDOORTOIND
13. M eae nre www adiit de Connect to the Indoor pipe out temp sensor Fig 17 PCB Board Size 48 22 777777 7 771 mmm mmm gt 77777 gt CNIXTHE SAME TU CNIS CNLXTHE SAME TU CN14 10 200VAC running Connect to the reoctor PFC Voltoge between the CM6 E M 890 330VDC standby SAME TD gt NO USE CN6C AND CN8 890 330VDC standby 290 330VDC Running 5 6 7 AND AC FAN SIGNAL t to the of Mainboard 9 lt 5 6 7 PFC Signal CN93 4 Signal 1 2 AC FAN Signal LIU Sg m E Zoot NEUEM mM PS YT gt L f NN E f lt a CN7CDC F AN CNLCDC FAN Connect to the DC FAN 320VDC r eit sr Rt 4 1 od 33 al 24 CN39CTHE SAME TD CNIS AND 142 nnect to the CNS of Mainboard Connect to the and CNIS Provide 12V SVDC to Mainboard Fig 18 IPM and PFC Board Size 48 23 WIRING DIAGRAMS 202057090167 DUTDOOR IMT 14 TEMPERAT SENSOR L T i CONDENSE TEMPERATURE SENSOR PEE ELECTRONIC EXP IE VALVE MAIN BOARD ut 1 E COMPRESSOR Indoor Unit A 9 Power gt E Li 12 S Fig 19
14. 25 5 B da REL 52 b 202302130637 A CE KFR1OSU BP2T3N1 31DC7675 0 13 MP2 1 Fig 16 IPM Board Size 36 21 FUSE AND FUSE T250VAC 30A E SAME P 6 4 AND P 4 N DD Indoor power supply Communication port signal 124V0C Pulse yave betyeene 2 XN IND 3KL IND 208 230VAC USED CNI3 CNI6 CN21 CN29 CN37 S F S E S D S C S B S A Connect to the terminal i 3 i 4 P Connect to the eorth For EMC T rooms lean N j Connect chee DET a A 485 communication signal 208 230V PU 5VDC CN28 CN31 CN36 T Connect to the terminal CNe8 Connect to the em CN3 and CN36 Connect to the AC 4 OVAC 208 230VAC running qe 55 I I ie 2 x Connect to the room temp sensor t the 4 WAY Sas CM9C When A ha Is output Connect o a Compressor heater ao LLL ferito g 894446464 8 y ele When heater Is output 208 230VAC 4 de 20290514452 is ly e AA Connect to the High pressure switch signal Connec Chossis MM M 2 When heoter d bia were 42 000 00000000 000600000 300006 Connect to the Loy syttch signal CV a I connect to the comperssor top temp sensor NGG N NLS za EL
15. 98 147 196 245 Piping to furthest FCU Ft 98 98 98 98 Drop OD above ID Ft 32 32 32 32 Piping Lift OD below ID Ft 32 32 32 32 Pipe Connection Size Liquid In 1 4 2 1 4 3 1 4 4 1 4 5 Pipe Connection Size Suction In 3 8 2 3 8 3 1 2 3 8 3 1 2 2 3 8 3 Voltage Phase Cycle V Ph Hz 208 230 1 60 208 230 1 60 208 230 1 60 208 230 1 60 8 Power Supply Indoor unit powered from outdoor unit 15 19 27 29 MOCP Fuse Rating A 20 25 40 50 Unit Width In 33 3 37 2 37 2 36 9 Unit Height In 27 6 31 9 31 9 53 9 Unit Depth In 12 6 15 6 15 6 15 4 Net Weight Lbs 114 6 154 8 169 8 255 5 Airflow CFM 1 390 2 130 2 130 3 500 Sound Pressure dB A 60 63 63 64 DIMENSIONS OUTDOOR Table 5 Outdoor Unit Size 18 27 36 48 Height in mm 27 56 700 31 89 810 31 89 810 36 93 1369 Width in mm 33 27 845 37 20 945 37 20 945 53 9 938 Depth in mm 12 60 320 15 55 395 15 55 395 15 43 392 Weight Net Ibs kg 114 63 52 154 76 70 2 169 75 77 255 50 115 9 7 90 200 7 9 59 243 6 LA CA CA eee 22 05 560 W1 D2 14 17 360 33 27 845 W D D3 5 2 m uj S 5 3 m Ly a 4 ri D 2 28 58 T Unit inch mm 4 33 110 Fig 2 Outdoor Dimensions Size 18 DIMENSIONS OUTDOOR CON
16. Follow all safety codes Wear safety glasses and work gloves Keep quenching cloth and fire extinguisher nearby when brazing Use care in handling rigging and setting bulky equipment Read this manual 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 4 WARNING ELECTRICAL 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 4 WARNING EXPLOSION HAZARD Failure to follow t
17. LIQUID VALVE A I 00000 a a EXV B CAPILIARY B LIQUID VALVE B Y EE 0s oo CHECK VALVE EXV C CAPILIARY C lt WHO LIQUID VALVE C Y mo Lak 15 NES 00000 Condenser EXV D CAPILIARY D temp sensor LIQUID VALVE D CAPILIARY TUBE 00000 HEAT T EXCHANGE EVAPORATOR T1 Room temp sensor emp senso CONDENSER T2B A Evaporator GAS VALVE A temp sensor outlet T2 Evaporator GASVALVEB 1288 middle EIE V lt 4 WAY VALVE GAS VALVE G T2B C Accumulator High pressure GAS VALVE D T2B D gt 115 Discharge 4 HEATING Low pressure temp sensor switch Compressor Fig 25 Refrigeration Cycle Diagram Size 36 INDOOR OUTDOOR EXV A CAPILIARY A LIQUID VALVE A 000005 gt LIQUID VALVE B EXV B CAPILIARY B Q 2 00000 58 EXV C CAPILIARY C LIQUID VALVE C T CRECE VALVE g OOO ATT 24 gt 4 EXV D CAPILIARY D 13 LIQUID VALVE D pH 00000 Condenser IE 00000 CAPILIARY TUBE Sensor EXV E CAPILIARY E LIQUID VALVE E 00800 HEAT EXCHANGE HEAT i EVAPORATOR E Rye e EXCHANGE emp sensor CONDENSER GAS VALVE A ED T2 Evaporator GAS VALVE B temp sensor 4 4 4 m AS 4 WAY VALVE Tm n ex gt lt COOLING I ressure GAS VALVE D y Accumulator HEATING 4 gt 115 Discharge GAS VALVE E L
18. connect to P2 lt L DUT lt N DUT gt 208 230V T ll L 7 4 WAY FUSE HA z Si CEE HEAT N A IE o CN9 TSA 250VA Oy CN8 r Y HEATe L IN TSA 250 PTC HS 4 PP CNe9 m FUSE 202302130895 z T20AL 250VAC N DUT CE KFRBOW BPSTAN QC MITIR 310 D 03 YP 1 3 ill n jo l CN3 L IN CN37 T CN4 lt N IND CN38 power supply zz ON 208 230V AC TE connect to the terminal ii CN6 CNS controled by relayer CN9 CN8 Ccontroled by RY4 relayer connect to the heoter When heater Is ON output 208 230V AC Fig 11 PCB Board Size 18 CN CN2 Ccontroled by RY1 relayer connect to the 4 WAY When 4 Is ON output 208 230VAC 16 P 1 lt GND gt connect to the earth CNLZCP gt gt POUER SUPPLY rend RCCrunning LN4 CNS5 208 2300 connect to MAIN BDARDCN QUTZL DUT gt CN4 CN5 CNILCP gt 120 Cmm Qs Q CAM BO CS QS Od MED E105 ge DOAO OO 202302130933 A ME 88 58888 HE co E gt t n 4 nas rit ras us su 2 31 05 CMM2 i L 93 CN6 CNL connect to MAIN BOARD CN38 gt MAIN BOARD Low VOL su FAN 1590 SUPPLY connect to MAIN BOARD 15 170 DC 1 1 120 DC END 2 2 50 DC 3 GN 4 4 3 gt 5UDC Pulse vave 5
19. 203 14 384 3 26 52 53 66 10 99 106 3 113 13 363 3 27 50 28 67 10 61 107 3 025 12 343 6 28 48 14 68 10 25 108 2 941 11 325 1 29 46 11 69 9 902 109 2 86 10 307 7 30 44 17 70 9 569 110 2 781 9 291 3 31 42 33 71 9 248 111 2 704 8 275 9 32 40 57 72 8 94 112 2 63 7 261 4 33 38 89 73 8 643 113 2 559 6 247 8 34 37 3 74 8 358 114 2 489 5 234 9 35 35 78 75 8 084 115 2 422 4 222 8 36 34 32 76 7 82 116 2 357 3 211 4 37 32 94 77 7 566 117 2 294 2 200 7 38 31 62 78 7 321 118 2 233 1 190 5 39 30 36 79 7 086 119 2 174 0 180 9 40 29 15 80 6 859 120 2 117 1 171 9 41 28 81 6 641 121 2 061 2 163 3 42 26 9 82 6 43 122 2 007 3 155 2 43 25 86 83 6 228 123 1 955 4 147 6 44 24 85 84 6 033 124 1 905 5 140 4 45 23 89 85 5 844 125 1 856 6 133 5 46 22 89 86 5 663 126 1 808 7 127 1 47 22 1 87 5 488 127 1 762 8 121 48 21 26 88 5 32 128 1 717 9 115 2 49 20 46 89 5 157 129 1 674 10 109 8 50 19 69 90 5 130 1 632 11 104 6 51 18 96 91 4 849 12 99 69 52 18 26 92 4 703 13 95 05 53 17 58 93 4 562 14 90 66 54 16 94 94 4 426 15 86 49 55 16 32 95 4 294 B 25 50 3950K 16 82 54 56 15 73 96 4 167 17 78 79 57 15 16 97 4 045 R 90 C 5KN 3 18 75 24 58 14 62 98 3 927 19 71 86 59 14 09 99 3 812 APPENDIX 3 C 10 11 12 13 14 15 16 17 18 19 2021 22 48 50 52 54 56 58 60 62 64 66 68 70 72 23 24 25 26 27 28 29 30 31 32 33 34 35 74 76 78 80 82 84 86 88 90 92 94 96 98 67 Compressor Check Measure the resistance value of each winding by using
20. 25 7 5 Max height difference ft m 32 10 32 10 32 10 32 10 OU higher than IU indoor height difference ft m 49 15 49 15 49 15 49 15 IU higher than OU Max Piping Length with no additional refrigerant ft m 24 6 7 5 24 6 7 5 24 6 7 5 24 6 7 5 Piping charge per zone Max Length for one indoor unit ft m 65 6 20 82 25 98 30 98 30 Max height different between indoor units ft m 32 10 32 10 32 10 32 10 Total Maximum Piping Length Ft m 98 2 15 30 147 3 15 45 196 4 15260 245 5 15 75 Oz ft g m 0 16 15 0 16 15 0 16 15 0 16 15 between Standard Max piping length Gas Pipe in 3 8 2 3 8 3 1 2 3 8 3 1 2 3 8 3 Liquid Pipe in 1 4 2 1 4 3 1 4 4 1 4 5 Refrigerant Refrigerant Type R410A R410A R410A R410A Heat Pump Models Charge Amount Lbs kg 4 19 1 9 6 17 2 8 7 94 3 6 10 14 4 6 NOTE The refrigerant charge included is adequate for the number Long Line Applications of zones multiplied by the max piping length with no additional refrigerant 1 No change in line sizing is required 2 Add refrigerant per Table 17 Table 17 Additional Charge Table Per Zone Total Line Length Additional Charge oz ft Unit ftper indoor unit ft m Size T M 10 25 gt 25 66 gt 66 82 582 98 aX 3 8 8 20 20 25 25 30 18 66 2 al 10 None 0 16 36 0 16 M 48 30 SYSTEM EVACUATION AND CHARGING
21. DUCTED 24 2 TONS F FLOOR CONSOLE OUTDOOR UNIT Q C 18 SN 3 38 OUTDOOR UNIT VOLTAGE 3 208 230 1 60 SYSTEM TYPE Q HEAT PUMP MAXIMUM NUMBER OF FAN COIL UNITS THAT NOT USED AN BE CONNECTED TO THE OUTDOOR UNIT 2 52 4 OR 1 5 NOMINAL CAPACITY 18 1 1 2 TONS 27 2 1 4 TONS UNIT TYPE 36 3 TONS E AI OUTDOOR UNIT 01 15 10001 Week of Manufacture Sequential Serial Number Year of Manufacture V ALL MODELS LID A DA CERTIFIED www ahridirectory org j Use of the AHRI Certified TM Mark indicates a C Us manufacturer s LISTED participation in the program For verification of certification for individual products go to www ahridirectory org INDOOR UNIT 619 P Q 009 B B A 619 FAN COIL UNIT A ALL MODELS P HIGHWALL R CASSETTE DUCTED FLOOR CONSOLE M ALL VOLTAGE 208 230 60 SYSTEM B ALL Q HEAT PUMP NOMINAL CAPACITY INDOOR FAN COIL TYPE 009 3 ATON B High Wall 012 1TON C Cassette 018 1 1 2TONS D Ducted 024 2TONS Floor Console OUTDOOR UNIT 538 Q 018 R C A 538 Air Cooled Condenser A ALL MODELS T MODEL VOLTAGE 208 230 1 60 MAXIMUM NUMBER OF FAN COIL UNITS THAT AN BE CONNECTED TO THE OUTDOOR UNIT SYSTEM TYPE 1 2 1 3 Q HEAT PUMP 1 4 OR 1 5 NOMINAL CAPACITY 018 11 2
22. IYE IR VALVE VALVE 1 5 DE FAN III E 4 1 LEX TX DEAD LI A 355659955 ET COMPRESSOR iy H LT i 1 MAT L I gt mil ET x an TPT IE iN L I Er MA LA sig 1 EI OA E Pd zu LL E Lr D Ped NS LH I E LA EH a ra ar oor Unit lier Pas Supply Signal Ground igh 208 230 1 60 Voltage ule s 900 KIMORA Indoor Unit B Power Suppt Ground 208 230 1 60 Win 141112151 1996 Fig 20 Wiring Diagrams 27k Table 13 Outdoor Unit Control Board Size 27 CODE PART NAME CN18 CN19 CN22 Output PinS amp 6 12V Pinl Pin4 Pulse waveform 0 12V CN17 Input Pin3 4 SV Pin2 0V Pin1 Pin5 0 5V CN7 Input Pin1 0 5V Pin2 5V CN1 CN2 CN5 CN6 Output CNI CN2 CN5 CN6 230VAC High voltage P1 P2 Output Connection of the high voltage CN3 CN4 Input 230VAC High voltage CN14 Input Pin1 Pin3 0V Pin2 Pin4 0 5 P 1 P 2 Connection to the earth CN20 CN23 CN25 Output Pini Connection of the high voltage Pin2 Pin3 230VAC High voltage CN15 Input Pin1 Pin3 PinS 5V Pin2 Pin4 Pin6 0 5 CN37 Output Pulse 0 320VDC for DC FAN CN38 Input Pin1 Pin2 17VDC N OUT L OUT Output 230VAC High voltage CN21
23. Number Number 9 000 40MAQB09B 3 619PEQ009BBMA High Wall 12 000 40MAQB 12B 3 619PEQ012BBMA 18 000 40MAQB 18B 3 619PEQ018BBMA 9 000 40 9 3 619REQ009CBMA Cassette 12 000 40 12 3 619REQ012CBMA 18 000 40 18 3 619REQ018CBMA 38MGQD27 3 538TEQ027RDMA 9 000 40MBQBO9D 3 619REQOO9DBMA Ducted 12 000 40MBQB 12D 3 619REQ012DBMA 18 000 40MBQB18D 3 619REQ018DBMA 9 000 4 3 619REQOO9FBMA Floor Console 12 000 40MBQB 12F 3 619REQ012FBMA Table 3 Combinations Table Size 36 and 48 Outdoor Model Outdoor Model Indoor Unit Nominal Unit Btuh Indoor Model Number Indoor Model Number Number Number 9 000 40MAQBO9B 3 619PEQOO9BBMA Hiah Wall 12 000 40MAQB 12B 3 619PEQ012BBMA 18 000 40MAQB18B 3 619PEQ018BBMA 24 000 40MAQB24B 3 619PEQ024BBMA 9 000 4 9 3 619REQ009CBMA Cassette 12 000 40MBQB12C 3 619REQ012CBMA 38MGOF36 3 538TEQ036RFMA 18 000 40MBQB18C 3 619REQ018CBMA 38MGQF48 3 538TEQ048RFMA 9 000 40MBQBO9D 3 619REQ009DBMA Ducted 12 000 40MBQB12D 3 619REQ012DBMA 18 000 40MBQB18D 3 619REQ018DBMA 24 000 40MBQB24D 3 619REQ024DBMA 9 000 40MBQBO9F 3 619REQO009FBMA Floor Console 12 000 40MBQB12F 3 619REQ012FBMA PHYSICAL DATA OUTDOOR Table 4 Outdoor S
24. defective FS No E Indoor unit coil outlet temp sensor or connector of sensor is defective F6 No F Indoor unit coil outlet temp sensor or connector of sensor is defective Temperature protection of compressor top P2 P3 P1 P1 High pressure protection P2 Low pressure protection P3 Current protection of compressor P2 P4 Temperature protection of compressor discharge P5 High temperature protection of condenser P6 IPM module protection P0 ES 33 Diagnosis and Solution EEPROM parameter error diagnosis and solution E0 F4 Error Code EO F4 Malfunction decision conditions Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip Supposed Causes e Installation mistake PCB faulty Trouble shooting Shut off the power supply and turn it on 5 seconds later 15 it still displaying the error code Yes Y If the EEPROM chip is welded on main PCB replace the main PCB directly Otherwise check whether the Correct the connection y EEPROM chip is plugged into main PCB well Yes y Replace the main PCB EEPROM a read only memory whose contents can be erased and reprogrammed using a pulsed voltage 34 Remark Use a multimeter to test the DC voltage between the L2 port and S ports of the outdoor unit
25. hand 2 Go to the chart listed in the diagnostic hierarchy and follow the steps in the chart for the selected problem For the ease of service the systems are equipped with diagnostic code display LED s on both the indoor and outdoor units The outdoor diagnostic display is on the outdoor unit board and is limited to very few errors 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 the appendix Problems may occur that are not covered by a diagnostic code but are covered by the diagnostic flow charts These problems are typical air conditioning mechanical or electrical issues that can be corrected using standard air conditioning repair techniques For problems requiring measurements at the control boards 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 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 pulsating voltages for signal this pulse should be rapidly moving at all times when there is a signal p
26. shows P6 and the AC turns off Supposed causes e Wiring mistake e malfunction e Outdoor fan ass faulty e Compressor malfunction Outdoor PCB faulty Troubleshooting IPM module protection Check whether the voltage range of P N on IPM module is normal DC277 356V for 18 27KBtu h DC277 410V for 36KBtu h Yes heck whether the connecting line between main board and the IPM module is connected tightly Yes eck whether the connecting line of the compressor is onnected correctly or tightly Yes Replace the IPM module check whether the system can work normally heck if the outdoor fan runs properly or the outdoor nit ventilation is good No Replace the main board check whether the system can work normally eplace the compressor check whether the system can work normally Yes y Check whether the input power supply is correct 208 230V 1N 60Hz egulate it to correct then check whether the system can work normally No Connect it tightly check ok or not Connect it correctly and tightly check ok or not power supply line is connected correctly and tightly Yeg No Connect it well check ok or not heck whether the line in E part box are connected tightly Connect it Z 1 Check whether the bridge rectifiers are norma
27. the outdoor current exceeds the current limit value the LED displays the failure e Wiring mistake e Over load protector faulty Supposed causes e System block e Outdoor PCB faulty Troubleshooting Current protection of compressor Judge 1 Check whether the input current of the power supply wire is more than 12 5A 18K For No Replace outdoor main board 27K it is 17 For 30K it is 18 5 For 36K it is 23A Yes Y Check whether the refrigerant system is ok Judge 2 Check whether the outdoor ambient temperature Yes Stop the unit is higher than 122 F Y J 3 Check whether th udge RC Rr Yes Make the outdoor unit ventilate well outdoor unit is bad ventilation Judge 4 Check whether the heatene dint Yes gt Clean the heat exchanger v Judge 5 The pine is Let the refrigerant out then use the high pressure Yes gt nitrogen or refrigerant to blow pipe vacuumize blocked and charge the refrigerant again No 4 Replace outdoor board and check whether the Yes system can run normally No Replace the electric control box Yes Trouble is solved 59 60 P4 Temperature protection of compressor discharge error diagnosis and solution Error Code W
28. the tester Input Terminal Blue Blue 4 Red 2 Black 3 Position Resistance Value Blue Red 0 950 20 C 68 F 0 550 20 C 68 F 0 530 20 C 68 F 0 440 20 C 68 F IPM continuity check 68 Turn off the power let the large capacity electrolytic capacitors discharge completely and dismount the IPM Use a digital tester to measure the resistance between P and UVWN UVW and N Normal resistance value Digital tester Digital tester Normal resistance value Black Red ___ IM Several Several AC Fan Motor Measure the resistance value of each winding by using the tester Position Hesistance Value RPG20B RPG28H Black Red 3810x896 68 F 3420 8 68 F 183 60 8 68 F 18002896 68 F White Black 26701896 68 F 25301896 68 F 2060 8 68 F 1900896 68 F Measure the resistance value of each winding by using the tester Input Terminal Sack i E roawr 5 Va uu uu uaa Blue Yellow Rad Black Brown ET MUN s Red Yellow Position Resistance Value Black 560 8 24 50 8 3170 8 1450 8 3450 8 6270 8 88 50 8 Red 68 F 68 F 68 F 68 F 68 F 68 F 68 F Red 760 8 190 8 2520 8 880 8 1500 8 374 30 8 1380 8 Yellow 68 F 68 F 68 F 68 F 68 F 68 F 68 F Yellow 760 8 190 8 2520 8 880 8 1500 8 374 30 8
29. 1380 8 Blue 68 F 68 F 68 F 68 F 68 F 68 F 68 F 4 Way Valve 1 Power on use a digital tester to measure the voltage when the unit operates in cooling it is When the unit operates in heating it is about 230VAC If the value of the voltage is not in the range the PCB must have problems and need to be replaced IMETER 178 DIGITAL MULT 70 EXV check Disconnect the connectors Red Brown Blue 1 Resistance to EXV coil Color of lead wire Normal Value Red Blue Red Yellow About 500 Brown Orange Brown White 71 Red Blue Red Yellow 72 Brown Orange Brown White 73 DISASSEMBLY INSTRUCTIONS No Partname Procedures Remarks 0 How to remove the panel plate 1 Panel plate Screws of top panel 1 Stop operation of EM the air conditioner and turn OFF the power breaker Screws of front panel lt Screws of the right side panel 2 Remove the screws of top Screws of top cover cover and remove the top T cover 9 screws A Screws of right 796 gt J Screws of 3 Remove the screws of right ear panel front panel front side panel and remove the right front side panel 2 2222 ie Screws S Remove the screws of front panel and remove the front _ MB panel 9 screws SS
30. 2 39 8239 38 5 62961 78 1 25423 118 0 37956 1 37 1988 39 5 39689 79 1 21330 119 0 36954 0 35 2024 40 5 17519 80 1 17393 120 0 35982 1 33 3269 41 4 96392 81 1 13604 121 0 35042 2 31 5635 42 4 76253 82 1 09958 122 0 3413 3 29 9058 43 4 57050 83 1 06448 123 0 33246 4 28 3459 44 4 38736 84 1 03069 124 0 32390 5 26 8778 45 4 21263 85 0 99815 125 0 31559 6 25 4954 46 4 04589 86 0 96681 126 0 30754 7 24 1932 47 3 88673 87 0 93662 127 0 29974 8 22 5662 48 3 73476 88 0 90753 128 0 29216 9 21 8094 49 3 58962 89 0 87950 129 0 28482 10 20 7184 50 3 45097 90 0 85248 130 0 27770 11 19 6891 51 3 31847 91 0 82643 131 0 27078 12 18 7177 52 3 19183 92 0 80132 132 0 26408 13 17 8005 59 3 07075 93 0 77709 133 0 25757 14 16 9341 54 2 95896 94 0 75373 134 0 25125 15 16 1156 55 2 84421 95 0 73119 135 0 24512 16 15 3418 56 2 73823 96 0 70944 136 0 23916 17 14 6181 57 2 63682 97 0 68844 137 0 23338 18 13 9180 58 2 53973 98 0 66818 138 0 22776 19 13 2631 59 2 44677 99 0 64862 139 0 22231 66 APPENDIX 2 Unit Discharge Temperature Sensor Table 20 542 7 20 68 66 60 13 59 100 3 702 19 511 9 21 65 62 61 13 11 101 3 595 18 483 22 62 73 62 12 65 102 3 492 17 455 9 29 59 98 63 12 21 103 3 392 16 430 5 24 57 37 64 11 79 104 3 296 15 406 7 25 54 89 65 11 38 105 3
31. 38MGQ 40MAQ 40MBC 40MBD 40MBF 538TR 619PB 619RC 619RD 619RF Multi Zone Ductless Split System Sizes 18 to 48 Service Manual TABLE OF CONTENTS PAGE SAFETY CONSIDERATIONS 4 1 INTRODUCTION castor pes a ad metas 1 MODEL NUMBER NOMENCLATURE 2 STANDARD FEATURES AND ACCESSORIES 4 COMBINATION TABLE ua eR teh ee pees 5 PHYSICAL DATA OUTDOOOR 6 DIMENSIONS OUTDOOR sud RAT e 7 CLEARANCES OUTDOOR unas 11 ELECTRICAT DATA AE 12 CONNECTION DIAGRAM 14 WIRING DIAGRAM 24 REFRIGERATION CYCLE DIAGRAMS 28 REFRIGERANTEINES 244555 wae 30 SYSTEM EVACUATION AND CHARGING 31 TROUBLESHOOTING da I UP SS ES eA 32 APPENDIX 5 amu 66 SAFETY CONSIDERATIONS Installing starting up and servicing air conditioning equipment can be hazardous due to system pressures electrical components and equipment location roofs elevated structures etc Only trained qualified installers and service mechanics should install start up and service this equipment Untrained personnel can perform basic maintenance functions such as cleaning coils All other operations should be performed by trained service personnel When working on the equipment observe precautions in the literature and on tags stickers and labels attached to the equipment
32. 4 609 24 609 4 101 monu 4 101 11 ELECTRICAL DATA Table 7 High Wall System Voltage OPERATING VOLTAGE INDOOR FAN VOLT PHASE HZ MAX MIN V PH HZ FLA HP W 9 0 07 0 027 20 12 0 07 0 027 20 18 208 230 1 60 253 187 208 230 1 60 0 17 0 077 58 24 0 23 0 08 60 30 0 23 0 08 60 Table 8 Ducted UNIT SIZE System Voltage OPERATING VOLTAGE INDOOR FAN VOLT PHASE HZ MAX MIN FLA HP W 9 1 03 0 073 55 12 1 03 0 073 55 x 208 230 1 60 253 187 24 0 83 0 12 90 36 1 263 0 2 150 48 2 23 0 32 240 Table 9 Cassette Cassette NUS System Voltage OPERATING VOLTAGE INDOOR FAN VOLT PHASE HZ MAX MIN V PH HZ FLA HP W 9 0 146 0 061 46 12 208 230 1 60 253 187 208 230 1 60 0 146 0 061 46 18 0 146 0 061 46 Table 10 Floor Console UNIT SIZE System Voltage OPERATING VOLTAGE INDOOR FAN VOLT PHASE HZ MAX MIN V PH HZ FLA HP W 2 208 230 1 60 253 187 208 230 1 60 2 12 0 21 0 027 20 Table 11 Multi Zone Outdoor Unit MAX UNIT SIZE System Voltage OPERATING VOLTAGE COMPRESSOR OUTDOOR FAN MCA pt VOLT PHASE HZ MAX MIN RLA FLA HP W 18 9 7 3 0 16 50 15 20 2 208 230 1 60 253 187 SEE E 36 13 4 3 0 16 120 27 40 48 13 5 3 0 11 85 29 50
33. 74 5 Remove the screws of big handle and remove the big P Screws of handle 4 screws big handle Remove two screws of terminal board four screws of water collector and fourteen screws of right rear panel and remove the right rear panel Screws of right How to remove the fan ass y 2 Fanassy l 1 Remove the top cover right front side panel and front panel from item 1 step 1 4 2 Remove the hex nut fixing the fan 3 Remove the fan 75 4 Remove the electrical control box cover 5 Disconnect the fan motor connector CN37 5p white from the PCB board 6 Remove the fan motor after unfastening four Screws How to remove the electrical Electrical parts parts 1 Perform work of item 1 2 2 Remove the ten screws fixing the IPM board 3 Unfasten the connector of the reactor 4 Unfasten the connector of the compressor 5 Disconnect following 5 pieces of connection wires and connectors between IPM and PCB Copyright 2015 7310 W Morris St Indianapolis 46231 Edition Date 08 15 Catalog No 33MGQ 01SM Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations Replaces NEW 76
34. B C T2B D T2B E e E external drive DC fan 54321 motor connector Electric Expansion Electric Expansion Electric Expansion Electric Expansion Electric Expansion 485 testPort m E external drive DC fan Value E Value D Value C Value B Value communication connect to detector external drive DC fan motor ouput terminal connect to exhaust temp sensor motor input terminal ADE ud T jenen 79 80 CNA3 4 CN37 CONNECT TO AC FAN MOTOR LOW SPEED 6 R RI current loop communication A FEEPPEERTEPEEEEERSEPEEFEE FAN L Es t3 CN43 3 CN36 AC fan motor low speed connector RUG C46 psp DN CO ABO CMO L CM N CN43 2 CN35 n ES m 122 m current loop AV fan motor N phase E IS L I m omme cation Signal wire I 9 connect to the terminal N43 5 CN43 1 CN41 CN42 I Y M mAs L J current loop 24VDC Pulse wave AC fan motor capacitor Cis communication C connector no 858 e 106 FFTTTTTTTTTTTT Uu wee m LI m Qus current loop n BH m ommunication C Q 5104 N22 L Ber 32 m N Ea De 5 connect to the 4 WAY SSL ty current loop when 4 way is ON output 208 230WAC p x sepes emmunication D q Ne L Heater 1
35. BLACK ERE INDUCTOR LOW PRESSURE SWITSH TEMPERATURE SENSOR de VALVE TEMPERATURE SENSOR OUTDOOR AMBIENT TEMPERATLIRE SENSOR rower S ww Ground EXE Lif 1215 ono Fig 21 Wiring Diagram 36k Table 14 Outdoor Unit Control Board Size 36 CODE PART NAME CN17 CN18 CN19 CN20 CN21 Output Pin5 amp 6 12V Pinl Pin4 Pulse waveform 0 12V CN8 Input Pin3 4 5V Pin2 0V Pin1 Pin5 0 5V CN33 Input Pin1 0 5V Pin2 5V CN4 CN40 CN10 CN44 Output CN4 CN40 CN10 CN44 230VAC High voltage CN3 CN22 Output High voltage for 4 way control CN1 CN2 Input 230VAC High voltage CN9 Input Pin1 Pin3 0V Pin2 Pin4 0 5 P 1 Connection to the earth CN27 CN28 CN29 CN30 Output Pinl Connection of the high voltage Pin2 Pin3 230VAC High voltage CN13 Input Pinl Pin3 Pin5 5V Pin2 Pin4 Pin6 0 5 CN12 Output Pulse 0 200VAC for DC FAN CN11 Output Pulse 0 200VAC for DC FAN CN5 CN6 Output 220VAC High voltage CN7 input Pinl Pin3 12VDC Pin2 Pin3 5VDC Pin4 Pin3 0 5VDC Pin5 Pin3 0 5VDC Pin6 Pin3 0 5VDC Pin7 Pin3 0 5VDC OUTDOOR UNIT IPM BOARD CN4 CN5 Output 220VAC High voltage CN2 CN3 Connect to Reactor 270 370VDC CN6 Output Pinl Pin2 17VDC Output Pinl Pin3 12VDC Pin2 Pin3 SVDC Pin4 Pin3 0 5VDC Pin5 Pin3 0 5VDC CN11 CN12 Output 270 370VDC High voltage U V W Connect to compr
36. Fan ass y faulty Fan motor faulty PCB faulty Troubleshooting Power off then restart the unit 3 minutes later Is it still No gt The unit operates normally displaying the error code Yes y Find out the cause and Shut off the power supply have it solved For rotate the fan by hand Does No gt example whether the fan is blocked or the screws which fix the fan are Yes tighten Check the wiring of fan motor Are all the connections good No gt Correct the connections Yes Y Check whether the main PCB is normal through index 1 E rotate properly No gt W gt Replace the main PCB Yes Y Replace the fan motor No 51 Index 1 DC fan motor control chip is inside fan motor Power on and when the unit is in standby measure the voltage of pin1 pin3 pin4 pin3 in fan motor connector If the value of the voltage is not in the range showing in below table the PCB must have problems and need to be replaced 2 123450 DC motor voltage input and output NO Color Signal Voltage 1 Red Vs Vm 200 380V 3 Black GND OV 4 White Vcc 13 5 16 5V 5 Yel
37. OORI OUTDOORTO INDOOR OUTDOOR TO INDOOR OUTDOOR TO INDOOR I I I I I I I 4 4 L1 C L2 C S C L1 D L2 D S D L2 E S E sd us ror Ut ror Ut Signal High s 208 230 1 0 50 206 280 160 230 1 60 soos wer Supply 208 230 1 60 Signal 208 230 1 60 97 High 1208 230 1 60 4 _ Fig 10 Connection Diagram Size 48 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 and will result in a fault code 15 CN38 connect to IPM BOARD CN6 CH50 CH7DV DC LED status light by which you con Judge the unit Normal or Error standby Flashing once per second low speed flashing terror Flashing once per half second lt high speed flashing running ayays on Connect to Electric Exponslon Volve UND lt p gt Uaahzaq a oM asid g IND amp asind 2 ND 2 Uaahyaq asind oq 9 gt U22h4209 asind CN39 3 lt lt DC FAN POWER SUPPLY 22 gt 88 P 2 N2 290 330V DC stondk8f9 300VDC Running Loy VUL supply 69 7 nu P connect to IPM BOARD CNILCP connect to IPM BOARD a N connect to IPM BOARD CN12 lt N
38. TINUED 1 a i i ri 1 IT Ue eEK m ui E Qi ku LL sss m i e 1 gt Dio AA S www ES AAA gt uu 8 F pr p EFL HE EE E 1 HH HIC PH HHL i UT is il 11781 T Ea 1 lii Y TW 1 25 20 6485 W 37 20 9483 13 43 87 W2 pes 93 9 5 81 15 94 405 D1 W Unitinch mm Fig 3 Outdoor Dimensions Size 27 DIMENSIONS OUTDOOR CONTINUED H 31 89 810 01 15 94 40 D2 17 68 449 5 00 127 X 3 35 85 LELLI 1 4 l E 7 01 178 L1 1 liii amp 1 1 W125 20 640 W 37 20 94 gt S 0379 5 81 15 94 405 D1 Unitinch mm Fig 4 Outdoor Dimensions Size 36 DIMENSIONS OUTDOOR CONTINUED 53 90 1369 X 1 TT HI HT lh hi 28 15 715 M H 24 96 634 W1 36 93 938 W 15 43 392 O 1449 368 5 15 91 404 Fig 5 Outdoor Dimensions Size 48 10 Unit inch mm L2 D1 CLEARANCES OUTDOOR Fig 6 Outdoor Unit Clearance Table 6 Outdoor Air inlet UNIT Minimum Value in mm 24 609 2
39. TONS 027 21 4TONS UNIT TYPE 036 3TONS R OUTDOOR UNIT 048 4TONS AUD EN Fu CERTIFIED www ahridirectory org j Use of the AHRI Certified TM Mark indicates a C US manufacturer s LISTED participation in the program For verification of certification for individual producis go to www ahridirectory org STANDARD FEATURES AND ACCESSORIES Ease of Installation Mounting Bracket 40 Low Voltage Controls 42 Comfort Features Microprocessor Control Wired Remote Control for High Walls Cassette and Floor Console Wired Remote Control for Ducted Wireless Remote Control Rapid Cooling and Heating Automatic Air Sweep Cold Blow Prevention Continuous Fan Auto Restart Function Auto Changeover Follow Me Energy Saving Features Inverter Driven Compressor Sleep Mode 24 Hour Stop Start Timer 46 F Heating Mode Heating Setback 0000 Safety And Reliability Indoor Coil Freeze Protection 3 Minute Time Delay For Compressor High Compressor Discharge Temperature Low Voltage Protection Compressor Overload Protection Compressor Over Current Protection IPM Module Protection DD DM Ease of Service Cleanable Filters 42 Diagnostic 42 Error Messages Displayed Front Panel 09 Application Flexibility
40. ce Power Wiring The main power is supplied to the outdoor unit The field supplied power wiring from the outdoor unit to indoor unit consists of three 3 wires and provides the power for the indoor unit Two wires are high voltage AC power and one is a ground wire To minimize voltage drop the factory recommended wire size is 14 2 stranded with a ground Communication Wiring A separate shielded copper conductor only with a minimum 300 volt rating and 2 64 inch thick insulation must be used as the communication wire from the outdoor unit to the indoor unit Please use a separate shielded 16GA stranded control wire 13 CAUTION EQUIPMENT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation Be sure to comply with local codes while running wire from indoor unit to outdoor unit Every wire must be connected firmly Loose wiring may cause terminal to overheat or result in unit malfunction A fire hazard may also exist Therefore be sure all wiring is tightly connected No wire should be allowed to touch refrigerant tubing compressor or any moving parts Disconnecting means must be provided and shall be located within sight and readily accessible from the air conditioner Connecting cable with conduit shall be routed through hole in the conduit panel CONNECTION DIAGRAMS Inde r Ground 208 230 1 60 ll Li 12 S jos
41. essor voltage among phases 0 200VAC 26 WIRING DIAGRAM OUTDOOR UNIT 202057190238 x Jada L amp IPM amp PFC BOARD T POWER SUPPLY 7 tApplcabla the uiis adapling matar only fii Ue A 4 ali ay ED WHITE Pa i R 2 T2 11 31 SENSOR 15 cn Applicatie lo tro unl maeseruneseeon adopting motor only pres or GE o mE fro Fig 22 Wiring Diagrams 48K Table 15 Outdoor Unit Control Board Size 48 CODE PART NAME CN1 CN3 P 1 Power input 230V AC CN2 CN4 Output Power output for DRIVER BOARD 230V AC CNS Input Communication Main board and IPM Board Pin1 5V DC CN6 Input DC FAN motor1 and DC FAN motor2 control Pin7 5V DC CN8 CN9 Input Temperature sensor 5 V DC CN10 Input Pressure test 5V DC CN13 Input Indoor pipe Temperature sensor Pin1 amp Pin3 amp Pin5 amp Pin7 amp Pin9 amp Pin11 SV DC CN15 CN23 CN26 CN30 CN33 Output PMV control Pin5 12V DC Pin6 12V DC CN17 CN18 Output High voltage for 4 way SV control 230V AC CN19 CN20 Output High voltage for HEAT_D control 230V AC CN13 CN16 CN21 CN29 CN37 Output Communication to indoor unit Pin2 and Pin3 230V AC Pin1 S connection to high voltage CN24 CN25 Output High voltage for HEAT_Y co
42. et temp sensor gt 4 4 iddl lt ida d ANN 4WAYVANE Y GASVALVEB 128 p SA Accumulator InT5 Discharge temp sensor Compressor lt 4 HEATING Fig 23 Refrigeration Cycle Diagram Size 18 INDOOR OUTDOOR _ EXV A CAPILIARY A T4 00000 EXV B CAPILIARY B LIQUID VALVE B CHECK VALVE I 5 000 EXV CAPILIARY T3 LIQUID VALVE C S 00000 Condenser PS 00U00 CAPILIARY TUBE Si EXCHANGE T4 Ambient EVAPORATOR een aes EXCHANGE emp sensor CONDENSER T2B A Evaporator GAS VALVE A temp sensor outlet T2 Evaporator __ temp sensor m middle T2B B 4 Nig gt Y 4 WAY VALVE GAsvALvE c 128 lt Accumulator T5 Discharge temp sensor COOLING Compressor 28 Fig 24 Refrigeration Cycle Diagram Size 27 INDOOR OUTDOOR EXV A CAPILIARY A
43. gt 4 3 5VDC Pulse wave N P 5 3 5VDC Pulse wave CNe4 NO USE peg USE NO USE NO USE cN26 Feo test port Y connect to detector CN17 CNee CN19 Vl Ly room temp sensor RT 6 7 plpe temp sensor il D ce 1 CN37 2 connect to outdoor DC FAN CN37 JS 5 CN7 Rus EE 3 C HD 3 2 290 300Y DC lt standby gt Exoust temp sensor RT o o 58 R98 4 4 3 gt 15 17V DC d 5 5 3 gt 0 56 DC fon speed control R oo 6 6 3 2 0 15V DC speed feeback gt 7 z L co DES E NO USE ITI Z USE 5 me 69 Dal 5 E Se pu J L pat Tr an Signal wire oT I connect to the terminal 15 88 5 E 24VDC Pulse wave betweene CN4 CN10 14 5 c27 R26 5 D30 NO USE LI MI L SoC CN20 107 L 232 B n do gu ius p E S B 47 Heii F 22 connect to the comperssor top temp sensor o Dis ov DC Ag Ale Tr current transformer pa 5 rete R64 yo R59 CN25 S A E 8868 LI AS ae rt ole ne L E connect to IPM BOARD CNS L OUT Ly o T T TL To connect to the Earth ptional ross the current transformerl T cos P 2 FOR lt L DUT lt N DUT gt 208 e30V AC Sis 1 connect to IPM BOARD CN4 Y N DUT 4
44. he unit start to work for 3 minutes the outdoor will receive indoor units of capacity demand T2 information and calculate the average of them After comparing each indoor units T2 with the average the outdoor unit gives the following modification commands If the T2 average 2 the relevant valve needs more 16p close If average 2 the T2 average 2 the relevant valve s open range remains If the T2 average 2 the relevant valve needs more 16p open This modification will be carried out every 2 minutes 6 4 5 Four way valve control In heating mode four way valve is opened In defrosting the four way valve operates in according to defrosting action In other modes the four way valve is closed When the heating mode to other modes the four way valve is off after compressor is off for 2 minutes Failure or protection not including discharge temperature protection high and low pressure protection four way valve immediately shuts down TROUBLESHOOTING 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 e Refigeration gauges Recommended Steps Refer to the diagnostic hierarchy charts below and determine the problem at
45. hen the compressor discharge temperature T5 is more than 239 F for 10 seconds the GONGINONS compressor stops and restarts when T5 is less than 194 F e Refrigerant leakage e Wiring mistake Supposed causes e The discharge temperature sensor faulty e Outdoor PCB faulty Troubleshooting Temperature protection of compressor discharge Check whether the Check whether the compressor discharge temp is Yes refrigerant is leak Yes Stop leaking and add refrigerant more than 239 F 2 No No Y Check whether the connection is right between compressor discharge temp No Correct the wiring connection sensor and PCB according to wiring diagrams Yes Y Measure the resistance value of compressor discharge temp sensor If the value is Replace the compressor discharge temp sensor not normal is normal refer to the Appendix 2 Yes Y Replace outdoor main PCB No v Replace high pressure valve assy 61 Error Code P5 High temperature protection of condenser error diagnosis and solution P5 Malfunction decision conditions When outdoor pipe temperature is more than 149 F the unit stops and unit runs again when the outdoor pipe temperature is less than 125 F Supposed causes e conde
46. his warning could result in death serious personal injury and or property damage Never use air or gases containing oxygen for leak testing or operating refrigerant compressors Pressurized mixtures Of air or gases containing oxygen can lead to an explosion A CAUTION EQUIPMENT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation Do not bury more than 36 in 914 mm of refrigerant pipe in the ground If any section of pipe is buried there must be a 6 in 152 mm vertical rise to the valve connections on the outdoor units If more than the recommended length is buried refrigerant may migrate to the cooler buried section during extended periods of system shutdown This causes refrigerant slugging and could possibly damage the compressor at start up INTRODUCTION This Service Manual provides the necessary information to service repair and maintain the multi zone family of heat pumps Section 2 of this manual has an appendix with data required to perform troubleshooting Use the Table of Contents to locate a desired topic MODEL NUMBER NOMENCLATURE INDOOR UNIT MB Q B 09 D 3 40 FAN COIL UNIT MA HIGH WALL MB CASSETTE DUCTED FLOOR CONSOLE VOLTAGE 3 208 230 1 60 SYSTEM TYPE Q HEAT PUMP NOT USED INDOOR FAN COIL TYPE NOMINAL CAPACITY 09 3 4 TON B HIGH WALL 12 1 TON CASSETTE 18 1 1 2 TONS D
47. input Pinl Pin3 12VDC Pin2 Pin3 SVDC Pin4 Pin3 0 5VDC Pin5 Pin3 0 5VDC CN39 Input 270 370 VDC High voltage OUTDOOR UNIT IPM BOARD CNA4 CN5 Output 230VAC High voltage CN2 CN3 Connect to Reactor 270 370VDC CN6 Output 1 2 17VDC CN1 Output Pinl Pin3 12VDC Pin2 Pin3 5VDC Pin4 Pin3 0 5VDC Pin5 Pin3 0 5VDC CN11 CN12 Output 270 370VDC High voltage U V W Connect to compressor voltage among phases 0 200VAC 25 DRIVER BOARD CODE PARTNAME CO PART NAME ELECTRIC EXPANSIVE EXHAUST FAM OUTDOOR CONDENSER CRANKCASE HEATING 4i PRESSURE SWITCH HEATSINK e TEMPERATURE SENSOR mm s 202057190269 Applicable ka vais kirin DZ malor only E T OPTIONAL NOTE Feursway wala r m he Fein 5 6 untony _ a Em Sv Cw ute _ 5 6 B E DNA _ HEAT Y C cnt FT EEV AME D CN18 HEAT D pel zu IEMA MAIN BOARD 5 6 E 95 os 1 TRI d LPRO LAA a as y a
48. ion 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 31 Electronic Expansion Valve EXV Control EXV will be fully closed when turning on the power Then EXV will be standby with 350P open and will open to target angle after compressor starts 2 EXV will close with 160P when compressor stops Then EXV will standby with 350P open and then opens to target angle after compressor starts 3 The action priority of the EXVs is A B C D 4 Compressor and outdoor fan start operation only after EXV is initialized Cooling mode The initial open angle of EXV is 250P adjustment range is 100 350p When the unit start to work for 3 minutes the outdoor will receive indoor units of capacity demand T2B information and calculate the average of them After comparing each indoor s T2B with the average the outdoor gives the following modification commands If the T2B gt average the relevant valve needs more 16p open If the T2B average the relevant valve s open range remains If the T2B average the relevant valve needs more 16p close This modification will be carried out every 2 minutes 6 4 4 2 Heating mode The initial open angle of EXV is 250P adjustment range is 100 350p When t
49. ision conditions If the sampling voltage is not 5V the LED displays the failure Supposed causes Wiring mistake Over load protector faulty System block Outdoor PCB faulty Troubleshooting High pressure protection Whether the wiring between the high pressure switch and main control No Connect it well board is connected well or correctly Yes Y Whether the high pressure protector is broken Method Disconnect the plug Measure the resistance of the high pressure protector if Replace high pressure protector the protector is normal the value is o Yes Check whether the outdoor ambient temperature is Yes Stop the unit higher than 122 F No v Check if the outdoor unit ventilation is good Make the outdoor unit ventilate well Yes vv Check if the outdoor fan runs properly please refer to the solution of fan speed has been out of control malfunction Find out the cause and have it solved No Yes Check whether the heat exchanger is dirty ves Clean the heat exchanger No Replace outdoor main board Check whether the refrigerant system is ok 55 56 P2 Low pressure protection error diaenosis and solution Error Code P2 Malfunction decision conditions If the
50. ize 18 27 36 48 Outdoor Model 38MGQC18 3 38MGQD27 3 38 6 3 38MGOF48 3 System 538TEQ018RCMA 538TEQ027RDMA 538TEQ036RFMA 538TEQ048RFMA Max Number of Zones 2 3 4 5 Energy Star YES YES NO YES Cooling Rated Capacity Btu h 18 000 25 000 36 000 42 000 Cooling Cap Range Min Max Btu h 8 500 20 000 9 000 30 000 9 500 37 000 10 000 50 000 SEER 21 22 18 20 Non Ducted EER 12 5 12 5 8 8 12 5 Heating Rated Capacity Btu h 18 500 32 000 36 000 49 000 Heating Cap Range Min Max Btu h 9 000 22 000 9 500 32 000 10 000 39 000 10 500 55 000 HSPF 9 6 9 6 10 0 10 0 Cooling Rated Capacity Btu h 17 500 26 000 35 000 42 000 Cooling Cap Range Min Max Btu h 8 500 20 000 9 000 30 000 9 500 36 500 10 000 50 000 Performance 19 5 19 25 16 5 19 EER 12 5 11 8 5 11 75 Non Ducted Heating Rated Capacity Btu h 18 250 32 000 36 000 50 000 Heating Cap Range Min Max Btu h 9 000 22 000 9 500 32 000 10 000 39 000 10 500 55 000 HSPF 9 1 9 2 9 7 9 8 Cooling Rated Capacity Btu h 17 000 27 000 34 000 42 000 Cooling Cap Range Min Max Btu h 8 500 20 000 9 000 30 000 9 500 36 000 10000 50000 SEER 18 16 5 15 18 Ducted EER 12 5 9 5 8 2 11 Heating Rated Capacity Btu h 18 000 32 000 36 000 51 000 Heating Cap Range Min Max Btu h 9000 22000 9500 32000 10 000 39 000 10 500 55 000 HSPF 8 5 8 8 9 3 9 5 Operating Cooling Outdoor DB Min Max F 4 122 4 122 4 122 4 122 Range Heating Outdoor DB Min Max F 4 86 4 86 4 86 4 86 Total Piping Length Ft
51. l Use the multimeter to measure Replace the bridge rectifiers the resistance between each two 1 terminals check whether there is the condition that value of resistance is O Replace the connecting line or reactor or replace the PFC module Refer to 8 5 Trouble Criterion Of Main Parts check whether the resistance of the fan motor is normal If not replace the fan motor For other models refer to the solution of fan speed has been out of control malfunction Find out the cause and have it solved Yes Yes Check whether the connecting line of every reactor is normal If the line is broken the resistance of the two ports is models except for M40C 36HRFN1 Check whether the module broken Yes q Trouble is solved B 63 The cooling operation or heating operation does not operate Supposed causes e 4 way valve faulty Check the 4 way valve Refer to part 5 in 9 5 When cooling heat exchanger of non operating indoor unit frosts When heating non operating indoor unit gets warm Supposed causes e LXV faulty e Wire and tubing connected in reverse Check the EXV Refer to part 6 in 9 5 Trouble Criterion Of Main Parts IMPORTANT If you replace outdoor main PCB you need to check whether the is produced before Apr 2013 If yes you need to short connect OLP connector Otherwise the outdoor LED displays P0
52. low Vsp 0 6 5V 6 Blue FG 13 5 16 5V 52 PO Temperature protection of compressor to error diagnosis and solution Error Code PO Malfunction decision conditions If the sampling voltage is not 5V the LED displays the failure Supposed causes e Wiring mistake Overload protector faulty e System block e Outdoor PCB faulty Troubleshooting Temperature protection of compressor top Check the air flow system of indoor and outdoor units Power off then restart the unit 10 minutes later Check ere the temperature of compressor top is more than gt Check the refrigerant volume charge Yes Refrigerant system is blocked such as capillary or welded point of pipes Yes Clear up the air inlet and outlet or the heat exchanger of indoor and outdoor units Check wiring connection of the overload protector Yes Y Measure the resistance between the two ports of the OLP Is it zero Replace the OLP No gt Correct the connection Yes gt s B Replace the outdoor main PCB Recharge the correct refrigerant volume 53 178 Digital MULTIMETER 54 P1 High pressure protection error diagnosis and solution Error Code P1 Malfunction dec
53. n and port The normal value should be 190V 250V E6 PFC module protection error diagnosis and solution Error Code E6 Martes conditions When the voltage signal that PFC sends to main control board is abnormal the display LED E displays 6 and the AC turns off Wiring mistake e Outdoor PCB faulty Supposed causes e Inductance of PFC module faulty PFC module malfunction Troubleshooting PFC module protection Check whether the connecting line between main board and the PFC module is connected tightly N Connect it tightly check normal or not No module is normal DC277 Yes Replace the outdoor main board 356V for 18 27 KBtu h DC277 410V for 36KBtu h No y Check whether inductance of PFC m s is good If the inductance is good the resistance of the two ports is O Replace the inductance Check the voltage range of P N on IPM Yes Y v Replace the PFC module lt Trouble is solved 48 Two ports of the inductance 49 50 ES Outdoor fan speed has been out of control diagnosis and solution Error Code ES Malfunction decision conditions When outdoor fan speed keeps too low 300RPM or too high 2400RPM for certain time the unit stops and the LED displays the failure Supposed causes Wiring mistake
54. nser temperature sensor faulty e Heat exchanger dirty e System block Troubleshooting High temperature protection of condenser No Check whether the condenser temperature is Higher than 149 F Yes i Check the connection between temperature sensor and PCB Yes heck whether the temp sensor is normal efer to the Appendix 1 Stop the unit Check whether the outdoor ambient temperature is Yes higher than 122 F No v Check if the outdoor unit A Make the outdoor unit ventilate well ventilation is good 1 Yes v resistance of condenser Check if the outdoor fan runs properly please refer to the solution of fan malfunction Find out the cause and speed has been out of control No have it solved Yes Check whether the heat B m exchanger is dirty es ean the heat exchanger Yes No v Replace outdoor main board No Refrigerant is not enough add the refrigerant No Check whether the refrigerant system is ok 62 No Correct the connection Replace the temperature sensor P6 IPM module protection error diagnosis and solution Error Code P6 Malfunction decision conditions When the voltage signal that IPM send to compressor drive chip is abnormal the display LED
55. ntrol 230V AC 2 1 2 Output Power output for AC motorl and FAN motor2 230V AC CN39 Output L2 for AC FAN SV and HEAT High voltage AC P 5 P 6 Connection to the earth OUTDOOR UNIT IPM BOARD U V W Output Pulse 0 380VDC for COMPRESSOR Output Connect PFC Inductance high DC voltage CN6 CN8 Input Power input for DRIVER BOARD 200 320V DC CN7 CN11 Output DC FAN motorl and DC FAN motor2 control Pinl 310V or 380V DC CN9 Output Communication Main board and IPM Board Pin7 5V DC CN55 Output Communication IPM Board and Main board Pin1 12V DC CN14 CN15 CN39 Output High DC voltage 310V or 380V DC 21 REFRIGERATION CYCLE DIAGRAMS INDOOR OUTDOOR EXV A CAPILIARY A LIQUID VALVE A vr WOT gt CHECK VALVE EXV B CAPILIARY B 4 00800 LIQUID VALVE B T p T3 mu v TOCO 5000 Condenser temp sensor CAPILIARY TUBE HEAT oe T4 Ambient EVAPORATOR 4 EXCHANGE emp sensor CONDENSER T2B A Evaporator T2 Evaporator GAS VALVE A temp sensor outl
56. ow pressure temp sensor switch 4 Compressor Fig 26 Refrigeration Cycle Diagram Size 48 29 REFRIGERANT LINES 1 The outdoor units are shipped with a full charge of R410A refrigerant charges line sizing and capacities are based on runs of 25 ft 7 6 m per number of zones For runs over 25 ft 7 6 m consult long line section on this page for proper charge adjustments 2 Minimum refrigerant line length between the indoor and outdoor units is 10 ft 3 m IMPORTANT Both refrigerant lines must be insulated separately e The following maximum lengths are allowed 3 Refrigerant lines should not be buried 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 4 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 5 Special 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 Table 16 Refrigerant Lines System size 18K 27K 36K 48K Min Piping Length ft m 10 3 10 3 10 3 10 3 Standard Piping Length ft m 25 7 5 25 7 5 25 7 5
57. resent 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 32 Indoor Unit Diagnostic Guides Table 18 Diagnostic Codes Display LED STATUS IDU Error IDU Error E0 Outdoor EEPROM malfunction 2 Communication malfunction between indoor and outdoor units 1 E2 E3 Communication malfunction between IPM board and outdoor main board E4 Open or short circuit of outdoor temperature sensor T3 T4 T5 T2B F2 E6 E5 Voltage protection P1 PFC module protection ES Outdoor fan speed has been out of control Only for DC fan motor models FS E9 Wrong wiring connection of 24K indoor unit F1 No A Indoor unit coil outlet temp sensor or connector of sensor is defective F2 No B Indoor unit coil outlet temp sensor or connector of sensor is defective F3 No C Indoor unit coil outlet temp sensor or connector of sensor is defective No D Indoor unit coil outlet temp sensor or connector of sensor is
58. sampling voltage is not 5V the LED displays the failure Supposed causes e Wiring mistake e Over load protector faulty e System block e Outdoor PCB faulty Low pressure protection Whether the wiring between the low pressure protector and main control No board is connected well or correctly Yes Y Whether the low pressure protector is broken Connect it well Method Disconnect the plug Measure the resistance of the low pressure protector If the protector is normal the value is 0 No gt Replace low pressure protector Lo Yes Check whether the outdoor ambient temperature is too low Check whether valve core of high pressure valve is opened Yes Stop the unit CY Open fully valve core of No high pressure valve Yes please refer to the solution of fan speed has been out of control malfunction Find out the cause and have it solved Check if the indoor fan runs No properly in cooling mode Tr 1 Yes Replace outdoor main board No v Refrigerant is not enough add the refrigerant No v Check whether the refrigerant system is ok 57 58 P3 Current protection of compressor error diagnosis and solution Error Code P3 Malfunction decision conditions If
59. uum pump Low side valve Fig 28 Manifold 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 29 5000 4500 4000 3500 3000 2500 z 2000 1500 1000 TIGHT 500 DRY SYSTEM VACUUM TIGHT TOO WET 0 1 2 3 4 5 6 7 MINUTES Fig 29 Deep Vacuum Graph Triple Evacuation Method The triple evacuation method should be used Refer to Fig 30 and proceed as follows Pump system down to 500 MICRONS of mercury and allow pump to continue operating for an additional 15 minutes Unit must maintain 500 microns or less for 30 minutes or more to ensure a dry system 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 10 minutes During this time dry nitrogen will be able to diffuse throughout the system absorbing moisture 5 Repeat this procedure as indicated in Fig 30 System will then be free of any contaminants and water vapor EVACUATE BREAK VACUUM WITH DRY NITROGEN lt lt lt 494 EVACUATE CHECK FOR TIGHT DRY SYSTEM IF IT HOLDS DEEP VACUUM RELEASE CHARGE INTO SYSTEM Fig 30 Triple Evacuat
60. ve the feedback from outdoor unit during 120 seconds or outdoor mato s n i unit does not receive the feedback from any one indoor unit during 180 seconds e Wiring mistake Supposed Causes gt Indoor or outdoor PCB faulty Troubleshooting Communication malfunction between indoor and outdoor units Start Power off then Power on the A C by the Breaker reconnect the power wire Is it still displaying the error code heck wiring on the outdoor and indoo terminal follow the wiring diagram Is all connecting correctly gt Reconnect the wiring Reconnect the wiring No Yes Measure Vs is it moving alternately between positive value and negative value Vs is the voltage between S and L2 Refer PIC 1 Is all the wiring between terminal and Indoor PCB connect ok Turn on all indoor unit by remote controller Is all indoor unit display Yes Y Change the Indoor PCB Yes lt rVVO Is p es urn off the all indoor units Is IP power LED or operating LED lamp On Refer PIC2 No change IPM Power on by remote controller Ils it still displaying the error code after 3 minutes Is main board Bg lamp on Refer PIC 3 Is the reactor connecting well Reconnect the wiring

Service Manual - DCNE Ductless and VRF

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