Carrier 38VMA Series Service Manual Download

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38VMH072-432

Outdoor Unit for

Variable Refrigerant Flow (VRF) Heat Pump System

Service Manual

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 17-38VMH001-06

Printed in U.S.A.

Form 38VMH-1SM

Pg 1

10-17

Replaces: NEW

Summary of Contents for 38VMA Series

Page 1: ...Heat Pump System Service Manual Manufacturer reserves the right to discontinue or change at any time specifications or designs without notice and without incurring obligations Catalog No 17 38VMH001...

Page 2: ...rol 28 a Cooling Electronic Expansion Valve Control 28 b Heating Electronic Expansion Valve Control 28 4 Fan Control 29 a Cooling Fan Control 30 b Fan Control Process 30 c Heating Fan Control 30 IV Sp...

Page 3: ...ctronic Expansion Valve Error 54 o 10Hd 20Hd Follower Unit Error 54 p 0P1 Current Leakage Error 55 q 0P1 Discharge Temperature Switch or High Pressure Protection 56 r 0P2 0H5 Low Pressure Protection 5...

Page 4: ...I General Information 1 Model Number Nomenclature Figure 1 Model Nomenclature Outdoor Unit Figure 2 Model Nomenclature Indoor Units 4...

Page 5: ...indoor units Capacity index of the outdoor units Keep a proper connected capacity ratio for the entire system Table 2 Connected Capacity Ratio Min combination ratio Max combination ratio 40VMH for all...

Page 6: ...4 24 Ton Dual Module Figure 5 26 36 Ton Triple Module 4 Indoor Units Lineup Figure 6 4 Way Cassette 40VMF Figure 7 Compact 4 Way Cassette 40VMC Figure 8 High Static Duct 40VMH Figure 9 High Wall 40VMW...

Page 7: ...VMA192HDS6 1 8 8 33 18 38VMA216HDS5 1 38VMA216HDS6 1 8 10 36 20 38VMA240HDS5 1 38VMA240HDS6 1 10 10 39 22 38VMA264HDS5 1 38VMA264HDS6 1 12 10 46 24 38VMA288HDS5 1 38VMA288HDS6 1 12 12 50 26 38VMA312HD...

Page 8: ...II Refrigerant Circuit 1 Refrigerant Circuit Diagram Figure 17 38VMA072 096 120HDS 8...

Page 9: ...Figure 18 38VMA144HDS 9...

Page 10: ...re switch Used to protect the system pressure When the system pressure is too low the pressure switch will open Once the pressure switch is open compressor will stop and will restart after 12 minutes...

Page 11: ...2 Functional Parts Layout Figure 19 38VMA072 096 120HDS 11...

Page 12: ...Figure 20 38VMA0144HDS 12...

Page 13: ...3 Refrigerant Flow for Each Operational Mode a 38VMA072 096 120HDS Figure 21 Cooling Operation 13...

Page 14: ...Figure 22 Cooling Oil Return 14...

Page 15: ...Figure 23 Heating Oil Return and Defrost 15...

Page 16: ...Figure 24 Heating Operation 16...

Page 17: ...b 38VMA144HDS Figure 25 Cooling Operation 17...

Page 18: ...Figure 26 Cooling Oil Return 18...

Page 19: ...Figure 27 Heating Oil Return and Defrost 19...

Page 20: ...Figure 28 Heating Operation 20...

Page 21: ...III Function and Control 1 Operation Mode Figure 29 Operation Mode 21...

Page 22: ...erating frequency upper limit control with inverter protection control Outdoor unit fan FAN A Heating fan control Outdoor unit fan FAN B Heating fan control Four way valve ST1 ON Electronic expansion...

Page 23: ...Ambient temperature T4 5 F T4 36 F T4 5 F OR T4 131 F T4 correction factor C 30 0 QCi Total cooling capacity for indoor units QCi AxB x C Round number Table 7 Outdoor unit cooling capacity calculation...

Page 24: ...calculation Indoor unit capacity BTU Indoor unit capacity x 100W Indoor unit capacity HP A Indoor unit capacity BTU Indoor unit capacity x 100W Indoor unit capacity HP A 6000 15 17 0 5 36000 112 4 0 7...

Page 25: ...3 F T1 TS 63 70 7 so B 2 T4 45 so C 100 T2A average 93 F so E 6 QHi AxB x C 1 2 x 2 x 6 2 0 x 2 x 6 x 100 38 4 Round number 39 72 outdoor unit capacity QHo QHix D D 39 x 8 8 10 17 3 Round number 18 96...

Page 26: ...20Hz 20Hz 22 58Hz 58Hz 58Hz 3 20Hz 20Hz 20Hz 23 60Hz 60Hz 60Hz 4 20Hz 20Hz 20Hz 24 62Hz 62Hz 62Hz 5 20Hz 20Hz 20Hz 25 64Hz 64Hz 64Hz 6 20Hz 20Hz 20Hz 26 68Hz 68Hz 68Hz 7 20Hz 20Hz 20Hz 27 70Hz 70Hz 7...

Page 27: ...17 46Hz 36 68 66 55 86 84 18 48Hz 37 70 68 56 86 84 19 52Hz 38 72 70 Table 12 Heating Compressor Control 38VMA072 096 120HDS Capacity QHr Frequency Capacity QHr Frequency 38VMA072 38VMA096 38VMA120 38...

Page 28: ...2Hz 31 62 60 50 86 84 13 44Hz 32 63 61 51 87 85 14 46Hz 33 64 62 52 88 86 15 48Hz 34 66 64 53 89 87 16 52Hz 35 67 65 54 90 88 17 54Hz 36 68 66 55 92 90 18 56Hz 37 70 68 56 92 90 19 58Hz 38 72 70 NOTES...

Page 29: ...The system will check the maximum discharge temperature every 2 minutes 4 Fan Control Table 17 Fan Steps Fan Steps Rotating Speed 38VMA072 096HDS 38VMA120HDS 38VMA144HDS 0 0 0 0 0 0 0 1 250 0 250 0 2...

Page 30: ...2 b Fan Control Process Figure 30 Fan Control Process NOTE When compressor ramps up fan speed will be at the initial step for 90 seconds Then the fan will be controlled per the fan control process c H...

Page 31: ...fan FAN A T4 and capacity control Outdoor unit fan FAN B T4 and capacity control Four way valve ST1 ON Electronic expansion valve EXV A Heating EXV control Electronic expansion valve EXV B Heating EXV...

Page 32: ...ormal control Four way valve ST1 ON OFF ON Electronic expansion valve EXV A Normal control 480P Normal control Electronic expansion valve EXV B Normal control 480P Normal control Electronic expansion...

Page 33: ...0P 0P Solenoid valve SV4 OFF OFF Solenoid valve SV7 OFF OFF Ending conditions 12 minutes 12 minutes 3 Overload Control To maintain the required set point the air flow of all indoor units are set to lo...

Page 34: ...lenoid valve SV4 OFF Solenoid valve SV7 OFF Ending conditions Follower unit is required to operate Table 30 In Heating Operation Component Follower unit operation Compressor OFF Outdoor unit fan FAN A...

Page 35: ...otection Control When Pe 7 25 psi outdoor unit will stop and the error code P2 is displayed 3 Discharge Pipe Protection Control This discharge pipe protection control is used to protect the compressor...

Page 36: ...plays error code P3 Model A A B B C C D D E F MV5 H072 120DXN1 33A 30A 32A 29A 30A 25A 27A 24A 33 5A 35A MV5 H144DXN1 INV 31A 29A 30A 27A 28A 24A 25A 22A 31 5A 35A MV5 H144DXN1 INV1 20A 18A 18A 16A 17...

Page 37: ...erating priority of outdoor units With the outdoor unit rotation control the system ensures that every outdoor unit has equal run hour making sure the oil is balanced between the individual outdoor un...

Page 38: ...S6 00 Automatic search address Default 01 Manual search address 10 Clear indoor units address S7 0 Reserved S8 0 Reserved S10 00 Reserved S13 00 Reserved S16 00 Balance mode Default 01 High efficienc...

Page 39: ...ystem check Forced cooling Forced heating Refrigerant recycle Refrigerant amount check Automatic refrigerant charging 2 How to Set Advanced Mode Codes 1 Press and hold SW4 button for 5 seconds and the...

Page 40: ...Default _n82 Low static pressure mode Reserved _n83 Medium static pressure mode Reserved _n84 High static pressure mode Reserved _nb_ Temperature unit setting _nb1 Temperature unit C _nb2 Temperature...

Page 41: ...close the gas valve quickly _n23 Refrigerant recycled to piping Enter Refrigerant recycle to piping _n23 mode and all indoor valves will open c Snow Blowing Function 1 Press SW5 button on spot check...

Page 42: ...munication chip 0H2 0H3 Incorrect number of ODUs Displayed on the header unit only 0H7 Incorrect number of IDUs 0H8 High pressure sensor error 0Hb Low pressure sensor error 10F1 20F1 PTC error 0F3 Tem...

Page 43: ...ication error between header unit and follower unit display on follower unit 4 Possible causes Incorrect address setting of ODU Communication lines between ODUs is not installed correctly Wiring betwe...

Page 44: ...Ph 60Hz 3 Error definition Communication Error between ODU and IDU 4 Possible causes Communication lines between ODU and IDU are installed incorrectly Improper power supply for IDU Damaged communicati...

Page 45: ...8VMA HDS6 1 460V 3Ph 60Hz 3 Error definition and inspection The temperature sensor T3 or T4 on main board is short or damage The test voltage should be 4 95V or 0 05V 4 Possible causes Loose connectio...

Page 46: ...38VMA HDS5 1 208 230V 3Ph 60Hz 38VMA HDS6 1 460V 3Ph 60Hz 3 Error definition Voltage of the ODU is not within the acceptable range 4 Possible causes Improper voltage Lack of power supply phase for the...

Page 47: ...f 20HO 10H0 Communication Error Between Main Control Board Chip and Compressor Drive Chip 1 Error display ODU display 10H0 20HO 2 Applicable models 38VMA HDS5 1 208 230V 3Ph 60Hz 38VMA HDS6 1 460V 3Ph...

Page 48: ...er of ODUs 1 Error display ODU display 0H2 or 0H3 displayed on header unit only 2 Applicable models 38VMA HDS5 1 208 230V 3Ph 60Hz 38VMA HDS6 1 460V 3Ph 60Hz 3 Error definition 0H2 The number of physi...

Page 49: ...cally connected indoor units to an outdoor unit does not match the ENC3 S12 setting 4 Possible causes Incorrect number of IDUs set for the main board of the ODU Duplicated addresses exist for the IDUs...

Page 50: ...8VMA HDS6 1 460V 3Ph 60Hz 3 Error definition 4 In the condition of unit operation or T4 10 when the detected HIGH PRESS 0 3MPa lasts for 20 seconds the high pressure sensor fault is reported 5 Possibl...

Page 51: ...1 208 230V 3Ph 60Hz 38VMA HDS6 1 460V 3Ph 60Hz 3 Error definition Detect the voltage value of low pressure sensor for open or short circuit If so a fault will be reported 4 Possible causes The low pre...

Page 52: ...ower on the DC bus voltage is outside the allowable range for more than 10 seconds 38VMA HDS5 1 208 230V 3Ph 60Hz 150 500V 38VMA HDS6 1 460V 3Ph 60Hz 300 900V 5 Possible causes Improper disconnected o...

Page 53: ...e sensor is damaged or shorted The test voltage is 4 95V or 0 05V 0F3 T5 Liquid tube temperature sensor error 0F4 T6 Sub cooler outlet temperature sensor error 0F5 T7 Compressor return gas temperature...

Page 54: ...electronic expansion valve is installed incorrectly Improper wiring of the solenoid coil for electronic expansion valve Damaged electronic expansion valve or solenoid coil Damaged main board o 10Hd 20...

Page 55: ...HDS5 1 208 230V 3Ph 60Hz 38VMA HDS6 1 460V 3Ph 60Hz 3 Error definition Current leakage on ODU 90 100mA and LED1 flashes on the leakage protection board 4 Possible causes Abnormal insulation resistance...

Page 56: ...High pressure due to excess refrigerant in the system High compressor discharge temperature caused by lack of refrigerant in the system Damaged main board Improper operation of sub cooler valve result...

Page 57: ...egistered value of low pressure sensor on the main board is 1 45 psi 0H5 error is reported when 0P2 occurs 5 times with in a period of 100 minutes 4 Possible causes The low pressure error is caused by...

Page 58: ...nt out of allowable range 4 Possible causes Stop valve is closed Improper power supply voltage Incorrect wiring for the solenoid valve Damaged electromagnetic valve Damaged main board Damaged module b...

Page 59: ...ischarge temperature sensor on the main board is 239 F 0H6 is reported when 0P4 occur 3 times within a 100 minute period 4 Possible causes High discharge temperature caused by lack of refrigerant in t...

Page 60: ...on Error is reported when the maximum value registered by the tube temperature sensor T3 on the main board is 149 F normal value for T3 131 F 4 Possible causes High temperature for the refrigerant in...

Page 61: ...whether the following are normal Fan motor of ODU Fan board Power supply of fan board Signals between fan board and main board 4 Possible causes Check wiring between the main board to the fan board p...

Page 62: ...witch off all the powers Check whether the wiring from main board to fan board and between fan boards are connected or not Check whether the PN terminal DC310V power of fan board is normal or not Chec...

Page 63: ...oard After the fan runs for ten seconds check to see if the red indicator LED2 of fan board is lighted or not YES Replace the power circuit of fan board NO check whether after the fan runs for thirty...

Page 64: ...her the signal lines from main board to fan board and between fan boards are connected or not Check whether the CN2 terminal DC310V power of fan board is normal or not Check whether the PN terminal DC...

Page 65: ...the fan board After the fan runs for ten seconds check whether the red indicator LED2 of fan board is lighted or not YES Replace the Power circuit of fan board NO After the fan runs for thirty seconds...

Page 66: ...n board Tf 172 4 F and 0C7 is reported when 0PL occur 3 times within 100 minutes 4 Possible causes Clogged fin of radiator resulting in poor heat transfer Left right fan connected in reverse order dur...

Page 67: ...Caution Turn off the power switch before connecting or disconnecting the connector Failure to do so could damage the board 67...

Page 68: ...for more information If L0 L9 protection occur 3 times within a 60 minute period 10H4 or 20H4 will be reported on the digital display of the main board Compressor A Module Protection Compressor B Modu...

Page 69: ...transient variation 15Hz between the former moment 2S and the next moment 16 L9 Protection for setting speed difference between transient variation and actual operation 15Hz 17 Possible Causes Imprope...

Page 70: ...Caution Turn off the power switch before connecting or disconnecting the connector Failure to do so could damage the board 70...

Page 71: ...ould damage the board NOTES 6 Model 38VMA HDS5 1 208 230V 3Ph 60Hz L1 Error will be reported when it is lower than 150VDC the under voltage setting value for DC bus 7 Model 38VMA HDS6 1 460V 3Ph 60Hz...

Page 72: ...ould damage the board NOTES 1 Model 38VMA HDS5 1 208 230V 3Ph 60Hz L2 Error will be reported when it is higher than 500VDC the over voltage setting value for DC bus 2 Model 38VMA HDS6 1 460V 3Ph 60Hz...

Page 73: ...Caution Turn off the power switch before connecting or disconnecting the connector Failure to do so could damage the board 73...

Page 74: ...Caution Turn off the power switch before connecting or disconnecting the connector Failure to do so could damage the board 74...

Page 75: ...Caution Turn off the power switch before connecting or disconnecting the connector Failure to do so could damage the board 75...

Page 76: ...ating outside the allowable limits allowable limits cooling 5 125FDB heating 4 64FWB 4 Possible causes The ODU ambient temperature exceeds the allowable operational limit Improper connection at the se...

Page 77: ...VIII Appendix 1 Wiring Diagram Figure 36 38VMA072 096 120HDS5 1 77...

Page 78: ...Figure 37 38VMA144HDS5 1 78...

Page 79: ...Figure 38 38VMA072 096 120HDS6 1 79...

Page 80: ...Figure 39 38VMA144HDS6 1 80...

Page 81: ...2 Electronic Control Box Layout Figure 40 38VMA072 096 120HDS5 1 Figure 41 38VMA144HDS5 1 81...

Page 82: ...Figure 42 38VMA072 096 120HDS6 1 Figure 43 38VMA144HDS6 1 82...

Page 83: ...Figure 44 Main control board layout Figure 45 ENC1 Outdoor unit addressing 83...

Page 84: ...Figure 46 ENC4 network addressing Figure 47 ENC3 S12 Indoor unit quantity setting 84...

Page 85: ...Figure 48 S5 Running mode priority setting Figure 49 S6 Auto addressing 85...

Page 86: ...Figure 50 S11 anti snow setting Figure 51 S16 Mode setting 86...

Page 87: ...Figure 52 S17 Heating mode setting Figure 53 S18 Cooling mode setting 87...

Page 88: ...1 4 92 1 0 40 91 4 6 98 2 68 181 4 1 07 4 41 3 2 86 7 0 42 93 2 6 69 2 73 183 2 1 03 4 43 5 0 81 7 0 45 95 0 6 40 2 79 185 0 1 00 4 45 6 8 77 0 0 47 96 8 6 13 2 84 186 8 0 97 4 46 8 6 72 6 0 50 98 6...

Page 89: ...3 61 37 4 155 20 0 25 131 0 16 32 1 65 224 6 3 02 3 63 39 2 147 60 0 26 132 8 15 73 1 69 226 4 2 94 3 66 41 0 140 40 0 27 134 6 15 16 1 73 228 2 2 86 3 69 42 8 133 50 0 28 136 4 14 62 1 78 230 0 2 78...

Page 90: ...3 92 0 96 7 81 2 54 34 8 33 06 0 98 7 32 2 62 37 7 31 45 1 02 6 98 2 68 39 2 30 69 1 04 6 54 2 76 42 1 29 25 1 08 6 23 2 82 43 5 28 58 1 10 5 84 2 90 46 4 27 29 1 14 5 46 2 98 47 9 26 68 1 16 5 20 3 0...

Page 91: ...5 12 31 1 98 261 0 11 45 2 06 275 5 10 66 2 15 290 0 9 94 2 24 304 5 9 26 2 33 319 0 8 64 2 41 333 5 8 06 2 50 348 0 7 52 2 59 362 5 7 01 2 68 377 0 6 54 2 76 391 5 6 09 2 85 406 0 5 67 2 93 420 5 5...

Page 92: ...IX Bill of Material BOM 1 38VMA072HDS5 1 38VMA096HDS5 1 38VMA120HDS5 1 Figure 54 3 Phase Heat Pump Exploded View 92...

Page 93: ...Figure 55 Control Board Views 93...

Page 94: ...4 way valve 1 15500216000123 9 Pipe temperature sensor assembly 1 11201007000277 10 Connecting pipe assembly 1 15127000005498 11 Oil return capillary assembly 1 15427000000282 12 Oil balance pipe ass...

Page 95: ...ss DC motor 2 11002015000086 50 Front beam 1 12227000001065 51 E part box assembly 1 17227000000800 51 1 1 Three phase bridge 1 11201418000002 51 1 2 Frequency converter module drive board brush glue...

Page 96: ...sensor assembly 1 11201007001786 57 Left panel assembly 1 12227000006792 58 Temperature sensor clipper 1 12127000000013 59 Room temperature sensor assembly 1 11201007000195 60 Network Controller 1 17...

Page 97: ...2 38VMA144HDS5 1 Figure 56 3 Phase Heat Pump Exploded View 97...

Page 98: ...98...

Page 99: ...Figure 57 Control Board Views 99...

Page 100: ...embly 1 11201007000277 9 Connecting pipe assembly 1 15127000005498 10 Oil return capillary assembly 1 15427000000006 11 Oil balance pipe assembly 1 15427000000925 12 Suction service valve assembly 1 1...

Page 101: ...813 48 Condenser assembly 1 15827000000124 49 Propeller fan 1 12100105000384 50 Brushless DC motor 2 11002015000086 51 Front beam 1 12227000001065 52 E part box assembly 1 17227000000799 52 1 1 Three...

Page 102: ...mbly 1 12227000005986 58 Top front cover 1 12227000000850 59 Front lower panel 1 12227000000779 60 Pipe temperature sensor assembly 1 11201007001786 61 Left panel assembly 1 12227000006792 62 Temperat...

Page 103: ...3 38VMA072HDS6 1 38VMA096HDS6 1 38VMA120HDS6 1 Figure 58 3 Phase Heat Pump Exploded View 103...

Page 104: ...Figure 59 Control Board Views 104...

Page 105: ...09 8 4 4 way valve 1 15500216000123 9 Pipe Temp sensor assembly 1 11201007000277 10 Connecting pipe assembly 1 15127000005498 11 Oil return capillary assembly 1 15427000000282 12 Oil balance pipe asse...

Page 106: ...49 Brushless DC motor 2 11002015000316 50 Front beam 1 12227000001065 51 E part box assembly 1 17227000000798 51 1 1 Three phase bridge 1 11201418000002 51 1 2 Frequency conversion module drive board...

Page 107: ...sor assembly 1 11201007001786 57 Left panel assembly 1 12227000006792 58 Temperature sensor clipper 1 12127000000013 59 Room temperature sensor assembly 1 11201007000195 60 Network Controller 1 172112...

Page 108: ...4 38VMA144HDS6 1 Figure 60 3 Phase Heat Pump Exploded View 108...

Page 109: ...109...

Page 110: ...re sensor clipper 1 12900103000008 5 Temperature controller of discharge pipe side 2 17400513000066 6 Discharge pipe assembly of compressor 1 15427000001924 6 1 Needle valve 1 15500301000008 6 2 Press...

Page 111: ...Solenoid 2 15500213000156 24 Connecting pipe assembly 1 15127000005538 25 EXV assembly 1 15427000001703 25 1 Electric expansive valve EEV 2 15500213000156 26 Plate to fix pipe 1 12227000001124 27 Fix...

Page 112: ...t 1 17400401000190 53 E part box assembly 1 17227000000801 53 1 Filter board assembly 1 17127000001702 53 2 Power transformer 1 11203103000148 53 3 Wire joint 1 17400401000169 53 4 Wire joint 1 174004...

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