Carrier 38VMB036HDS3-1 Service Manual Download

Page: 1 / 66

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

Edition Date: 07/21

Form No: 38VMH-1P-3SM

A Carrier Company

Printed in USA

Replaces: 38VMH-1P-2SM

A210217

Service Manual

38VMH-1P (036-060)

Outdoor Units for

Variable Refrigerant Flow (VRF) Heat Pump System

Summary of Contents for 38VMB036HDS3-1

Page 1: ...signs without notice and without incurring obligations 2021 Carrier All rights reserved Edition Date 07 21 Form No 38VMH 1P 3SM A Carrier Company Printed in USA Replaces 38VMH 1P 2SM 1 A210217 Service...

Page 2: ...6 Refrigerant Charge Calculation 12 REFRIGERANT CIRCUIT 13 Refrigerant Circuit 14 Refrigerant flow for Each Operation Mode 15 FIELD WIRING 18 Typical Power Supply Wiring 19 Typical Control Wiring 20 F...

Page 3: ...of Outdoor Indoor Units A210214 Fig 1 Outdoor Units Table 1 Outdoor Unit Nomenclature NOTE Refer to connected capacity restrictions A210215 Fig 2 Indoor Units Capacity 3 Ton 4 Ton 5 Ton Model Number 3...

Page 4: ...MH048 054 3 or 40VMV exceeds 30 the connected capacity must not exceed 100 CONNECTABLE INDOOR UNIT CAPACITY INDEX 5 7 9 12 15 18 24 30 36 48 54 1 Way Cassette 40VMI 4 Way Cassette 40VMF Compact 4 way...

Page 5: ...Figure 4 1 Way Cassette 40VMI A210220 Figure 5 4 Way Cassette 40VMF A210221 Figure 6 Compact 4 Way Cassette 40VMC A210222 Figure 7 High Static Duct 40VMH A210223 Figure 8 High Wall 40VMW A210224 Figu...

Page 6: ...e from IDU5 to the first branch is L3 L4 L5 L6 E so make sure that L2 L3 A L2 L3 L4 L5 L6 E and L3 L4 L5 L6 E L3 A are all less than 65 feet Table 4 Piping Length 1 If only one IDU connects to the ODU...

Page 7: ...pe should be increased from 5 8 to 3 4 or from 3 4 to 7 8 The pipe adapter must be located as close as possible to the ODU Table 9 Selection of A D Item Piping in the Figure Maximum Length Equivalent...

Page 8: ...th of L1 230 feet the gas pipe should be increased from 5 8 to 3 4 or from 3 4 to 7 8 The pipe adapter must be located as close as possible to the outdoor unit Table 12 Selection of L3 4 A F Item Pipi...

Page 9: ...et the gas pipe should be increased from 5 8 to 3 4 or from 3 4 to 7 8 The pipe adapter must be located as close as possible to the outdoor unit Table 15 Selection of L3 5 A F Item Piping in the Figur...

Page 10: ...t the gas pipe should be increased from 5 8 to 3 4 or from 3 4 to 7 8 The pipe adapter must be located as close as possible to the outdoor unit Table 18 Selection of L3 5 A F Item Piping in the Figure...

Page 11: ...city Use the proper tool to cut off unnecessary parts when connecting field pipes Table 19 Adapter Pipe Selection The branch joint must be installed parallel to the ground The angle of the joint shoul...

Page 12: ...ed refrigerant pipe and system layout additional refrigerant charge may be required Add additional refrigerant based on the calculation below A210240 Fig 19 Calculating Refrigerant Charge R Amount of...

Page 13: ...Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 13 REFRIGERANT CIRCUIT A210241 Fig 20 Functional Parts Layout...

Page 14: ...ed to adjust refrigerant flow rate Gas liquid separator ACC Used to separate gas refrigerant to prevent liquid slugging Solenoid valve SV4 Used to control the amount of oil from the oil separator back...

Page 15: ...Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 15 Refrigerant Flow for Each Operation Mode A210243 Fig 22 Cooling Operation...

Page 16: ...Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 16 A210244 Fig 23 Heating Operation...

Page 17: ...Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 17 A210245 Fig 24 Oil Return and Defrost Operation...

Page 18: ...38 40 40A 100mA 0 1second or less 38VMB060HDS3 1 8 8 40 45 45A 100mA 0 1second or less Be sure to use speci ed wires for connections and ensure no external force is impacting the terminal connections...

Page 19: ...the right to change at any time specifications and designs without notice and without obligations 19 Typical Power Supply Wiring A210247 Fig 25 Outdoor Unit Power Supply Wiring A210248 Fig 26 Indoor U...

Page 20: ...ut notice and without obligations 20 Typical Control Wiring Use 2 core stranded shielded wires for communication bus A210249 Fig 27 Control Wiring Maximum Length to Outdoor Unit L1 L3 L5 3937 feet AWG...

Page 21: ...ooling only 5 Debugging mode No 1 6 Debugging mode No 2 No Description Note 0 Normal display 1 0 1 Operating mode 2 0 2 3 4 2 Operating fan speed 3 The total capacity demands of indoor units 4 The cap...

Page 22: ...ctory setting A210251 Cooling priority mode A210252 Indoor unit priority mode IDU 63 or majority mode A210253 Heating mode only A210254 Cooling mode only SW4 A210255 Automatic addressing A210256 Manua...

Page 23: ...Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 23 FUNCTION AND CONTROL A210262 Fig 28 Operation Mode...

Page 24: ...temperature control Adjust refrigerant flow rate to protect compressor Fast Oil Return Valve SV4 17 minutes OFF then 3 minutes ON Hot Gas Bypass Valve SV5 OFF Spraying Liquid Valve SV6 Discharge tempe...

Page 25: ...re T5 If T5 increases EEV operates the opening to target value directly Otherwise it regulates itself to step by step operation A210263 Fig 29 Cooling Operation A210264 Fig 30 Heating Operation If the...

Page 26: ...seconds after the compressor starts outdoor fan step level is determined based on T4 T5 and Tc A210260A210266 Fig 32 Fan Control by Condensing Temperature Tc Method B shows the T4 23 F operation as me...

Page 27: ...ned based on frequency T3 and T4 A210268 Fig 34 Fan Control Correction by T3 and High Pressure Pd The compressor will stop and display EA error code suggesting outdoor fan has stayed in Zone A for mor...

Page 28: ...quency like the example above A210269 Fig 35 Sequence for Startup Control SV5 will open if heating frequency 50 Hz with startup manner A or B Component Cooling Operation Heating Operation Remark Compr...

Page 29: ...l Four way valve ST1 OFF EEV Normal control 300 Pls Normal control Fast oil return SV4 Normal control Hot gas bypass valve SV5 OFF Spraying liquid valve SV6 Discharge temperature protection control En...

Page 30: ...t fan Normal control ON for ten seconds then OFF 1 OFF for 45 seconds then normal control Four way valve ST1 ON ON for ten seconds switch to OFF OFF for 45 seconds then switch to ON EEV Current openin...

Page 31: ...L SV6 will open when the temperature T5 is over 199 F and closes when it is under 190 F If the discharge temperature exceeds 212 F even though SV6 has sprayed liquid refrigerant to cool down the compr...

Page 32: ...ution Unit will not start Power supply failure Power switch is off Fuse burned out Recover the power supply Switch on the power Replace the fuse Fan operates no cooling or heating Temperature is not s...

Page 33: ...hange at any time specifications and designs without notice and without obligations 33 Electrical Components and Wiring Diagrams OUTDOOR UNIT CIRCUIT BOARD ARRANGEMENT A210274 Fig 39 Integral Arrangem...

Page 34: ...right to change at any time specifications and designs without notice and without obligations 34 CIRCUIT BOARD INSTRUCTIONS A210276 Fig 41 Main Board Power output in this board is to provide power su...

Page 35: ...Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 35 A210277 Fig 42 Power Drive Board...

Page 36: ...ut current overload protection P4 Discharge temperature T5 protection P5 Condenser temperature T3 protection P8 Fan speed exceeds setpoint for five seconds or more PE High indoor coil temperature T2A...

Page 37: ...LE CAUSES Communication wires between ODU and IDUs are installed incorrectly Communication wires between communication and main control board are installed incorrectly Incorrect power supply for all I...

Page 38: ...ture sensor T3 or T4 on main board is short or damaged i e The test voltage 4 95V or 0 05V POSSIBLE CAUSES The temperature sensor is located at wrong place Loose connection at port on main control boa...

Page 39: ...t notice and without obligations 39 E5 POWER VOLTAGE PROTECTION DEFINITION The voltage of ODU is not within the acceptable range POSSIBLE CAUSES Improper voltage Loose wiring between power terminals a...

Page 40: ...on DIS1 if E6 occurs two times within ten minutes POSSIBLE CAUSES Burned out motor Incorrect wiring within electric control box Damaged power drive board Damaged main board of ODU A210281 Fig 46 E6 or...

Page 41: ...temperature sensor T5 is short or damaged Test voltage 4 95V or 0 05V POSSIBLE CAUSES The temperature sensor is installed in the wrong place Loose connection at post on main control board Damaged sen...

Page 42: ...EEPROM Wrong EEPROM mode Fig 48 E9 or E 9 Troubleshooting Chart EA DC FANS STAY AT ZONE A FOR MORE THAN FIVE MINUTES IN HEATING MODE DEFINITION Low pressure is too high even though the fan step minimu...

Page 43: ...H PRESSURE PROTECTION DEFINITION High pressure switch is activated for pressure 638 psi POSSIBLE CAUSES Stop valve is closed The heat exchanger is dirty or blocked Excess refrigerant in the system Dam...

Page 44: ...ION DEFINITION Low pressure switch is activated for pressure 20psi POSSIBLE CAUSES Stop valve is closed The heat exchanger is dirty or blocked Insufficient refrigerant in the system Damaged main board...

Page 45: ...NT OVERLOAD PROTECTION DEFINITION Input current overload protection is activated when current is drawn above the allowable limit POSSIBLE CAUSES Stop valve is closed Improper power supply Excess refri...

Page 46: ...on is activated when discharge temperature is higher than 230 F System will restart once the discharge temperature T5 is below 190 F POSSIBLE CAUSES Stop valve is closed Improper power supply Insuffic...

Page 47: ...temperature protection is activated when condenser temperature is higher than 144 F System will restart once the condensing temperature T3 is below 126 F POSSIBLE CAUSES Stop valve is closed Improper...

Page 48: ...400 RPM POSSIBLE CAUSES Fan speed exceeds the target fan motor rotation due to excessive wind PE HIGH INDOOR COIL TEMPERATURE T2A PROTECTION DEFINITION High indoor coil temperature T2A protection is a...

Page 49: ...49 PP LIQUID SLUGGING PROTECTION DEFINITION The discharge superheat of compressor is less than 5 4 F for 50 minutes POSSIBLE CAUSES Defective discharge temperature sensor Damaged main board Excess re...

Page 50: ...Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 50 A210292 Fig 57 PP Troubleshooting Chart...

Page 51: ...n board is inoperable POSSIBLE CAUSES Abnormal power supply to power drive board Damaged rectifier Damaged DC fan motor Damaged power drive board or main board The communication wire between power dri...

Page 52: ...BETWEEN POWER DRIVE AND MAIN CONTROL BOARD DEFINITION Communication error between power drive and main control board POSSIBLE CAUSES Communication wire between power drive board and main board is loos...

Page 53: ...dissipation IPM in poor heat dissipation Improper power supply Damaged compressor module in power drive board Burnt compressor Improper refrigerant in the system Error Detailed Definition Number of Fl...

Page 54: ...Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 54 L0 ERROR IN COMPRESSOR MODULE A210299 Fig 61 L0 Troubleshooting Chart...

Page 55: ...ight to change at any time specifications and designs without notice and without obligations 55 L1 DC BUS UNDER VOLTAGE PROTECTION A210300 Fig 62 L1 Troubleshooting Chart 1 L1 error will be reported w...

Page 56: ...ight to change at any time specifications and designs without notice and without obligations 56 L2 DC BUS OVER VOLTAGE PROTECTION A210301 Fig 63 L2 Troubleshooting Chart 2 L2 fault will be reported wh...

Page 57: ...Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 57 L4 COMPRESSOR MCE ERROR A210302 Fig 64 L4 Troubleshooting Chart...

Page 58: ...e specifications and designs without notice and without obligations 58 L8 COMPRESSOR SPEED DIFFERENCE BETWEEN SET AND RUN IS MORE THAN 15 RPS L9 COMPRESSOR SPEED DIFFERENCE IS MORE THAN 15 RPS IN ONE...

Page 59: ...4 8 72 2 40 172 4 1 26 4 32 5 8 117 66 0 32 84 2 8 34 2 46 174 2 1 22 4 34 4 0 110 60 0 34 86 0 7 97 2 51 176 0 1 18 4 36 2 2 104 02 0 36 87 8 7 63 2 57 177 8 1 14 4 38 0 4 97 86 0 38 89 6 7 30 2 62 1...

Page 60: ...9 30 2 190 50 0 2030 123 8 18 96 1 49 217 4 3 39 3 52 32 0 180 90 0 2133 125 6 18 26 1 53 219 2 3 30 3 55 33 8 171 90 0 2239 127 4 17 58 1 57 221 0 3 20 3 58 35 6 163 30 0 2352 129 2 16 94 1 61 222 8...

Page 61: ...Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 61 Electrical Wiring Diagrams A210304 Fig 66 Wiring Diagram...

Page 62: ...Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 62 BILL OF MATERIAL BOM A210305 Fig 67 VRF Outdoor Unit Internal Components...

Page 63: ...facturer reserves the right to change at any time specifications and designs without notice and without obligations 63 Fig 68 VRF Outdoor Unit Internal Components A210307 Fig 69 3 Ton Exploded View A2...

Page 64: ...Manufacturer reserves the right to change at any time specifications and designs without notice and without obligations 64 A210308 Fig 70 4 Ton Exploded View A210309 Fig 71 5 Ton Exploded View...

Page 65: ...15427000002366 5 4 SEPARATOR OIL Oil separator 1 0 15500501000011 6 ONE WAY VALVE ASSEMBLY D unit suction pipe assembly 1 0 15427000002359 6 1 PLUG FUSIBLE Fusible plug assembly 1 0 15427000001439 6...

Page 66: ...scontinue or change at any time specifications or designs without notice and without incurring obligations 2021 Carrier All rights reserved Edition Date 07 21 Form No 38VMH 1P 3SM A Carrier Company Pr...

Search results

Summary of Contents for 38VMB036HDS3-1

Reviews:

Related manuals for 38VMB036HDS3-1

Brands by name

Popular brands

Carrier 38VMB036HDS3-1, Service Manual

Search results

Summary of Contents for 38VMB036HDS3-1

Reviews:

Related manuals for 38VMB036HDS3-1

Brands by name

Popular brands