Bryant 538PAQ012RBMA Service Manual
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Bryant 538PAQ012RBMA Service Manual

Bryant 538PAQ012RBMA Service Manual

538pr outdoor unit single zone ductless system sizes 09 to 30
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538PR
Outdoor Unit Single Zone Ductless System
Sizes 09 to 30

TABLE OF CONTENTS

SAFETY CONSIDERATIONS

INTRODUCTION

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WIRING DIAGRAMS
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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. 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
. 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.
Service Manual
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These words are used with the safety−alert symbol. DANGER
identifies the most serious hazards which will result in severe personal
PAGE
injury or death. WARNING signifies hazards which could result in
1
personal injury or death. CAUTION is used to identify unsafe
1
practices which may result in minor personal injury or product and
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property damage. NOTE is used to highlight suggestions which will
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result in enhanced installation, reliability, or operation.
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!
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ELECTRICAL SHOCK HAZARD
8
Failure to follow this warning could result in personal
8
injury or death.
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Before installing, modifying, or servicing system, main
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electrical disconnect switch must be in the OFF
15
position. There may be more than 1 disconnect switch.
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Lock out and tag switch with a suitable warning label.
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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 outdoor units. Section 2 of this manual has an
appendix with data required to perform troubleshooting. Use the Table
of Contents to locate a desired topic.
WARNING
WARNING
EXPLOSION HAZARD
Failure to follow this 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.
CAUTION

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  • Page 1 538PR Outdoor Unit Single Zone Ductless System Sizes 09 to 30 Service Manual TABLE OF CONTENTS These words are used with the safety−alert symbol. DANGER identifies the most serious hazards which will result in severe personal PAGE injury or death. WARNING signifies hazards which could result in SAFETY CONSIDERATIONS .

  • Page 2: Model/Serial Number Nomenclatures

    MODEL/SERIAL NUMBER NOMENCLATURES Table 1—Unit Sizes SYSTEM TONS VOLTAGE/PH/HZ OUTDOOR MODEL 538PAQ009RBMA 115/1/60 538PAQ012RBMA 538PEQ009RBMA 538PEQ012RBMA 208-230/1/60 538PEQ018RBMA 538PEQ024RBMA 538PEQ030RBMA OUTDOOR UNIT 538 = OUTDOOR UNIT MA = ALL MODELS P = MODEL VOLTAGE A = 115/1/60 E = 208/230-1-60...

  • Page 3: Specifications

    SPECIFICATIONS Table 2—Specifications SIZE System Outdoor Model 538PAQ009RBMA 538PAQ012RBMA 538PEQ009RBMA 538PEQ012RBMA 538PEQ018RBMA 538PEQ024RBMA 538PEQ030RBMA Voltage, Phase, V/Ph/Hz 115-1-60 115-1-60 208/230-1-60 208/230-1-60 208/230-1-60 208/230-1-60 208/230-1-60 Cycle Electrical MOCP - Fuse Rating Cooling Outdoor DB °F (°C) -4~122 (-20~50) -4~122 (-20~50) -4~122 (-20~50)

  • Page 4: Dimensions

    DIMENSIONS Fig. 1 – Outdoor Unit 9K and 12K Table 3—Outdoor Units System Size V-Ph-Hz 115-1-60 208/230-1-60 Height (H) in (mm) 21.97 (558) 21.97 (558) 21.97 (558) 21.97 (558) Width (W) in (mm) 31.89 (810) 31.89 (810) 31.89 (810) 31.89 (810) Depth (D) in (mm) 12.2 (310)
  • Page 5 DIMENSIONS (CONT) Fig. 2 – Outdoor Unit 18K Table 4—Outdoor Units System Size V-Ph-Hz 208/230-1-60 Height (H) in (mm) 27.56 (700) Width (W) in (mm) 33.27 (845) Depth (D) in (mm) 12.60 (320) Weight-Net lbs (kg) 102.51 (46.5)
  • Page 6 DIMENSIONS − OUTDOOR (CONTINUED) Fig. 3 – Outdoor Unit 24K & 30K Table 5—Outdoor Units System Size V-Ph-Hz 208/230-1-60 Height (H) in (mm) 31.89 (810) 31.89 (810) Width (W) in (mm) 37.20 (945) 37.20 (945) Depth (D) in (mm) 15.55 (395) 15.55 (395) Weight-Net lbs (kg)

  • Page 7: Clearances

    CLEARANCES Air-inlet Air-outlet Fig. 4 – Clearances Outdoor Table 6—Clearances MINIMUM VALUE UNIT in. (mm) 24 (609) 24 (609) 24 (609) 4 (101) 4 (101) NOTE: The outdoor unit must be mounted at least 2in (50mm) above the maximum anticipated snow depth.

  • Page 8: Electrical Data

    ELECTRICAL DATA Table 7—Electrical Data OUTDOOR UNIT SIZE Volts-PH-Hz 115-1-60 115-1-60 208/230-1-60 208/230-1-60 208/230-1-60 208/230-1-60 208/230-1-60 Max – Min* 126-104 126-104 253-187 253-187 253-187 253-187 253-187 Oper. Voltage Power Supply Max Fuse/ CB AMP Volts-PH-Hz 115-1-60 115-1-60 208/230-1-60 208/230-1-60 208/230-1-60 208/230-1-60 208/230-1-60 Compressor...

  • Page 9: Connection Diagrams

    CONNECTION DIAGRAMS 115-1-60 FIELD POWER SUPPLY CONNECTING CABLE OUTDOOR TO INDOOR Indoor Power to Main Indoor Indoor Unit Signal Indoor Unit Power Supply Ground Signal Power Supply High 115-1-60 115-1-60 High Voltage 115-1-60 Voltage 9K and 12K 115V Indoor Unit 9K and 12K 115V Outdoor Unit Fig.

  • Page 10: Wiring Diagrams

    WIRING DIAGRAMS EXPANSIVE VALVE 6(5) CN31 BLACK CN16 CN15 HEATER, CRANKCASE CN32 CN33 BLACK HEATER, CRANKCASE CN34 Dashed frame CN28 parts only for heat CN26 pump model. YELLOW BLUE BROWN BLUE CN10(CN19) Power Input BLACK BLACK L N S Fig. 7 – Wiring Diagram for 9K & 12K 115V Table 8—Outdoor Unit Control Board CODE PART NAME...
  • Page 11 WIRING DIAGRAMS (CONTINUED) COMPRESSOR HEATER, CRANKCASE CN33 HEATER, CRANKCASE CN31 CN21 CN28 CN29 CN30 CN22 OPTIONAL: CN26 CN27 CN16 YELLOW BLUE CN9-1 CN32-1 L1 L2 WHITE WHITE DC-FAN REACTOR Power Input L1 L2 Fig. 8 – Wiring Diagram for 9K & 12K 208/230V Table 9—Outdoor Unit Control Board CODE INPUT or OUTPUT VALUE...
  • Page 12 WIRING DIAGRAMS (CONTINUED) OUT DOOR HEATER 1 CN414 CN15 L-OUT BLUE CN13 CN12 BLUE OUTDOOR CN14 MAIN BLACK YELLOW CN6-1 CN10 COMPRESSOR OUTDOORAMBIENT TEMPERATURE SENSOR Fig. 9 – Wiring Diagram for 18K 208/230V Table 10—Outdoor Unit Control Board CODE INPUT or OUTPUT VALUE CN7、CN8 Input: 230V High voltage Output: Connection of the high voltage...
  • Page 13 WIRING DIAGRAMS (CONTINUED) L-OUT CN10 YELLOW Fig. 10 – Wiring Diagram for 24K 208/230V Table 11—Outdoor Unit Control Board CODE INPUT or OUTPUT VALUE L_IN Power Voltage：AC 230V CN11 Power Voltage：AC 230V CN16 Relative to the N terminal voltage：DC24V CN15 Maximum voltage：DC 5V Maximum output voltage：AC230V Indoor fan interface, Maximum voltage：DC310V...
  • Page 14 WIRING DIAGRAMS (CONTINUED) BLACK COMP BLUE Applicable to the units adopting DC motor only CN12 CN11 CN33 BLACK YELLOW DRIVER BOARD BLUE BLACK HEAT1 CN10 CN54 CN22 The electric heating belt of compressor BLUE CN51 CN40 CN44 BLACK CN53 The electric heating HEAT2 belt of chassis BLUE...

  • Page 15: Fan And Motor Specifications

    FAN AND MOTOR SPECIFICATIONS Table 13—Fan and Motor Specifications System Size V-Ph-Hz 115-1-60 208/230-1-60 Material Outdoor Type ZL-421*117*8-3K ZL-421*117*8-3K ZL-421*117*8-3K ZL-421*117*8-3K ZL-460*180*10-3N ZL-560*139*12-3KN ZL-560*139*12-3KN Diameter 16.6 16.6 16.6 16.6 18.1 22.0 22.0 Propeller Height Model WZDK40-38G-1 WZDK40-38G-1 WZDK40-38G-W-1 WZDK40-38G-W-1 ZKFN-50-8-2 WZDK120-38G-1 WZDK120-38G-W Phase...

  • Page 16: Refrigerant Coil Specifications

    REFRIGERANT COIL SPECIFICATIONS Table 14—Outdoor Coil SYSTEM SIZE V-Ph-Hz 115-1-60 208/230-1-60 #of Rows 0.83x0.75 0.83x0.75 0.83x0.75 0.83x0.75 0.83x0.53 0.83x0.53 1.0x0.87 Tube Pitch(a) x Row Pitch(b) 21x19.05 21x19.05 21x19.05 21x19.05 21x13.37 21x13.37 25.4x22 Fin Spacing Fin Type Plate Plate Plate Plate Louvered Louvered Plate...

  • Page 17: Refrigeration Cycle Diagrams

    REFRIGERATION CYCLE DIAGRAMS Fig. 12 – Refrigerant Cycle Diagram Heat Pumps...

  • Page 18: Refrigerant Lines

    REFRIGERANT LINES General Refrigerant Line Sizing: 4 Both lines must be insulated. Use a minimum of 1/2−in. (12.7 mm) thick insulation. Closed−cell insulation is 1 The outdoor units are shipped with a full charge of R410A recommended in all long−line applications. refrigerant.

  • Page 19: System Evacuation And Charging

    SYSTEM EVACUATION AND CHARGING Deep Vacuum Method CAUTION The deep vacuum method requires a vacuum pump capable of pulling a vacuum of 500 microns and a vacuum gage capable of accurately measuring the vacuum depth. The deep vacuum method UNIT DAMAGE HAZARD is the most positive way of assuring a system is free of air and Failure to follow this caution may result in equipment liquid water (see Fig.

  • Page 20: Electronic Function

    ELECTRONIC FUNCTION Cooling Mode Compressor Running Rules Main Protection When T1−Ts<28.4 F(−2 C), the compressor stops, when Three Minute Delay for Compressor Restart T1—TS>31.1 F(−0.5 C), the compressor activates. When the AC Less than a one minute delay for the first time start−up and a three runs in the MUTE mode, the compressor runs with low a minute delay for subsequent start−ups.

  • Page 21: Troubleshooting

    Heating Mode TROUBLESHOOTING Compressor Running Rules This section provides the required flow charts to troubleshoot When T1−Ts>− Δ T, the compressor stops, when T1−TS< Δ T−1.5, problems that may arise. the compressor turns on. Δ T is the programmed parameter of NOTE: Information required in the diagnoses can be found temperature compensation.
  • Page 22 Electric power remains in the capacitors even the power supply is shut off. Do not forget to discharge the electricity power in the capacitor. Electric Capacitors (HIGH VOLTAGE! CAUTION!) Fig. 22 – Electrolytic Capacitors For other models, please connect discharge resistance (approx.100Ω 40W) or soldering iron (plug) between +, − terminals of the electrolytic capacitor on the contrary side of the outdoor PCB.

  • Page 23: Diagnostic Guides

    DIAGNOSTIC GUIDES Table 17—Diagnostic Guides Indoor Units OPERATION LAMP TIMER LAMP DISPLAY LED STATUS Indoor unit EEPROM parameter error 1 time Indoor / outdoor units communication error 2 times Indoor fan speed has been out of control 4 times Indoor room temperature sensor T1 open circuit or short circuit 5 times Evaporator coil temperature sensor T2 open circuit or short circuit 6 times...
  • Page 24 Outdoor Unit Error Display Sizes 09−12 (115V) Fig. 24 – Sizes 09−12 (115V) LEGEND: LED1 − The status light, by which you can judge the unit’s status, NORMAL or ERROR (standby). Flashes once per second (low speed flashing) (error). Flashes once per half second (high speed flashing) (running) always on.
  • Page 25 Outdoor Unit Error Display Sizes 09−12 (208−230V) L−IN [V2.4] 2013−9−21 CN3−1 DSA1 PTC1 CN32− 1 CN32 R127 R108 ACL−OUT R163 R134 R135 R124 IC17 R141 R157 R119 R125 R150 C110 R136 C418 AC_N R151 IC22 R126 R121 R116 DZ16 R140 DZ21 DZ11 IC11...
  • Page 26 Outdoor Unit Error Display Size 18 Earth CN6−1 [1.0] 2014−7−5 L−IN CN22 DSA1 CN21 CN12 REACTOR 65T 250V30A FUSE1 PTC1 L−OUT CN7−1 IC14 R111 CN15 REACTOR CN13 − − HEAT CN39 R414 IGBT1 R134 IC12 24LC08 CN16 CN38 R163 R165 C243 R322 R321...
  • Page 27 Outdoor Unit Error Display Size 24 LED1 CN38 IC18 CN24 CN22 CN19 CN18 R111 17V N− R112 R114 R113 IC32 IC17 DC MOTOR CN37 R115 CN17 T3/T4 R116 R118 R117 PAI QI R100 CN21 R102 IC15 TO−DRIVE DSP1 CN26 LED1 CN27 CN39 R120...
  • Page 28 Outdoor Unit Error Display Size 30 CN20 CN19 CN18 CN21 CN17 FAN_IN CN42 CN11 CN12 FAN_OUT IC21 R117 CN30 R114 S−A R113 IC10 [1.4]2014.06.26 FAN−L IC20 CN37 IC18 CN29 R132 R111 S−B R108 R106 T2B−E T2B−C T2B−D T2B−B T2B−A SSR1 IC19 R119 IC16...

  • Page 29: Diagnosis And Solution

    DIAGNOSIS AND SOLUTION EEPROM Parameter Error Diagnosis and Solution (E0/F4) Error Code E0/F4 Malfunction decision conditions Indoor or outdoor PCB main chip does not receive feedback from the EEPROM chip. ·Installation mistake Supposed causes ·PCB faulty Troubleshooting Power off, then restart the unit 2 minutes later.
  • Page 30 DIAGNOSIS AND SOLUTION (CONT) Indoor / outdoor unit’s communication diagnosis and solution (E1) Error Code Indoor unit does not receive feedback from the outdoor unit during 110 seconds and this condition Malfunction Decision Conditions happens four times continuously. ·Wiring mistake Supposed Causes ·Indoor or outdoor PCB faulty Troubleshooting...
  • Page 31 DIAGNOSIS AND SOLUTION (CONT) Fig. 30 – Test the DC Voltage Use a multimeter to test the DC voltage between L2 port and S port of the outdoor unit. The red pin of the multimeter connects with the L2 port while the black pin is for the S port. When air conditioner is running normal, the voltage moves alternately between −50V to 50V. If the outdoor unit has a malfunction, the voltage will move alternately with positive value.
  • Page 32 DIAGNOSIS AND SOLUTION (CONT) Zero crossing detection error diagnosis and solution (E2) Error Code When the PCB does not receive a zero crossing signal feedback for 4 minutes or the zero crossing Malfunction decision conditions signal time interval is abnormal. ·Connection mistake Supposed causes ·PCB faulty...
  • Page 33 DIAGNOSIS AND SOLUTION (CONT) Fan speed has been out of control diagnosis and solution (E3/F5) Error Code E3/F5 When indoor fan speed remains too low (300RPM) for certain time, the unit stops and the LED Malfunction decision conditions displays the failure. ·Wiring mistake ·Fan ass'y faulty Supposed causes...
  • Page 34 DIAGNOSIS AND SOLUTION (CONT) Index 1 1 Indoor or Outdoor DC Fan Motor (control chip is in 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 voltage value is not in the range shown in Table 19 or Table 20, the PCB has an issue and needs to be replaced.
  • Page 35 DIAGNOSIS AND SOLUTION (CONT) Open circuit or short circuit of temperature sensor diagnosis and solution (E4/E5/F1/F2/F3) Error Code E4/E5/F1/F2/F3 Malfunction decision conditions If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED displays the failure. ·Wiring mistake Supposed causes ·Sensor faulty ·PCB faulty...
  • Page 36 DIAGNOSIS AND SOLUTION (CONT) Refrigerant Leakage Detection diagnosis and solution (EC) Error Code Define the evaporator coil temp.T2 of the compressor. It starts running in Tcool. At first, 5 minutes after the compressor starts up, if T2 ＜Tcool－35.6 Malfunction decision conditions F (Tcool－2 C) does not run for 4 seconds and this situation occurs 3 times, the display area displays“EC”and the air conditioner turns off.
  • Page 37 DIAGNOSIS AND SOLUTION (CONT) Overload current protection diagnosis and solution (F0) Error Code Malfunction decision conditions An abnormal current rise is detected by checking the specified current detection circuit. ·Power supply problems ·System blockage Supposed causes ·PCB faulty ·Wiring mistake ·Compressor malfunction Troubleshooting Stop the unit...
  • Page 38 DIAGNOSIS AND SOLUTION (CONT) IPM malfunction or IGBT over−strong current protection diagnosis and solution (P0) Error Code When the voltage signals that the IPM sends to the compressor drive chip is abnormal, the LED Malfunction decision conditions displays “P0”and the air conditioner turns off. ·Wiring mistake ·IPM malfunction Supposed causes...
  • Page 39 DIAGNOSIS AND SOLUTION (CONT) Fig. 34 – P−U Fig. 35 – P−V...
  • Page 40 DIAGNOSIS AND SOLUTION (CONT) Fig. 36 – P−W Fig. 37 – N−U...
  • Page 41 DIAGNOSIS AND SOLUTION (CONT) Fig. 38 – N−V Fig. 39 – N−W...
  • Page 42 DIAGNOSIS AND SOLUTION (CONT) Over voltage or too low voltage protection diagnosis and solution (P1) Error Code Malfunction decision conditions An abnormal voltage rise or drop is detected by checking the specified voltage detection circuit. ·Power supply problems Supposed causes ·System leakage or block ·PCB faulty Troubleshooting...
  • Page 43 DIAGNOSIS AND SOLUTION (CONT) High temperature protection of compressor top diagnosis and solution (P2) Error Code Malfunction decision conditions If the sampling voltage is not 5V, the LED displays the failure. ·Power supply problems ·System leakage or block Supposed causes ·PCB faulty Troubleshooting Check the air flow system...
  • Page 44 DIAGNOSIS AND SOLUTION (CONT) Inverter compressor drive error diagnosis and solution (P4) Error Code An abnormal inverter compressor drive is detected by a special detection circuit, including Malfunction decision conditions communication signal detection, voltage detection, compressor rotation speed signal detection, etc..
  • Page 45 Main Parts Check Temperature Sensor Checking Disconnect the temperature sensor from the PCB, measure the resistance value with a tester. Fig. 41 – Tester 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.

  • Page 46: Appendix

    APPENDIX Table 21—Temperature Sensor Resistance Value Table for T1, T2, T3, T4 ( C−−K) K Ohm ° C ° F K Ohm ° C ° F K Ohm ° C ° F K Ohm 115.266 12.6431 2.35774 0.62973 108.146 12.0561 2.27249 0.61148 101.517...
  • Page 47 APPENDIX (CONT) Table 22—Temperature Sensor Resistance Value Table for T1,T2,T3,T4 ( C−−K) ° C ° F K Ohm ° C ° F K Ohm ° C ° F K Ohm ° C ° F K Ohm 542.7 68.66 13.59 3.702 511.9 65.62 13.11...
  • Page 48 APPENDIX (CONT) Δ Δ Table 23— F)=9 C)/5 ° ° ° C ° F ° C ° F ° C ° F ° C ° F ° C ° F 69.8 123.8 179.6 235.4 24.8 71.6 125.6 181.4 237.2 26.6 73.4 127.4 183.2...
  • Page 49 Compressor Checking Measure the resistance value of each winding by using the tester. Fig. 42 – Input Terminal Table 24—Resistance Value POSITION RESISTANCE VALUE DA110S1C-30FZ DA130M1C-31FZ DA250S2C-30MT TNB306FPGMC-L Blue - Red 0.8Ω 1.77Ω 0.55Ω 0.53Ω Blue - Black (20°C /68°F) (20°C /68°F) (20°C /68°F) (20°C /68°F)
  • Page 50 IPM Continuity Check 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. Table 25—Digital Tester NORMAL RESISTANCE NORMAL RESISTANCE DIGITAL TESTER DIGITAL TESTER VALUE...
  • Page 51 Cooling Charts Table 29—Cooling Chart ODT/IDT ° F ° C (23.89) (29.44) (35) (40.56) (46.11) 70/59 10.1 75/63 10.7 80/67 11.2 Table 30—Cooling Chart ODT/IDT ° F ° C (23.89) (29.44) (35) (40.56) (46.11) 70/59 75/63 80/67 Table 31—Cooling Chart ODT/IDT °...

  • Page 52: Disassembly Instructions

    DISASSEMBLY INSTRUCTIONS SIZES 09−12 NOTE: This part is for reference only, the photos may differ slightly from your actual unit. Part name Procedures Remarks Panel plate How to remove the panel Screws of top panel plate. 1) Stop the air conditioner and turn “OFF”...
  • Page 53 DISASSEMBLY INSTRUCTIONS SIZES 09−12 (CONT) Top panel screw 4) Remove the front panel screws, Front panel screws including the motor holder screws and then remove the front panel. Left plate screws 5) Remove the right side plate screws and remove the right side plate.
  • Page 54 DISASSEMBLY INSTRUCTIONS SIZES 09−12 (CONT) 2) Loosen the hooks and then open the electronic control box cover. 3) Disconnect the fan motor connector from the electronic Fan motor control board. connector 4) Remove the fan motor screws (4). 5) Remove the fan motor.
  • Page 55 DISASSEMBLY INSTRUCTIONS SIZES 09−12 (CONT) Electrical How to remove the parts electrical parts. Reactor connector 1) Complete the steps in sections 1 and 2 then remove the 3 connectors for the compressor and the electrical heaters. 2) Release the reactor connector. Compressor connector Two blue wires of four way valve 3) Pull out the two...
  • Page 56 DISASSEMBLY INSTRUCTIONS SIZES 09−12 (CONT) 5) Remove the ground wires. 6) Remove the power supply wires (L1, L2, S). 7) Remove the electronic control box. Four-way How to remove the valve four-way valve. The picture of four-way valve may be different from 1) Complete the the one on your side.
  • Page 57 DISASSEMBLY INSTRUCTIONS SIZES 09−12 (CONT) Compressor How to remove the compressor. 1) Complete the steps in sections 1,2, and 3. 2) Remove the Discharge discharge pipe and pipe and suction pipe with a suction burner. pipe 3) Remove the hex nuts and washers securing the compressor on the...
  • Page 58 DISASSEMBLY INSTRUCTIONS SIZE 18K Part name Procedures Remarks Panel plate How to remove the panel plate. Top panel screws 1) Stop the air conditioner and turn “OFF” the power breaker. 2) Refer to the photos on the right to locate the fixing panel screws.
  • Page 59 DISASSEMBLY INSTRUCTIONS SIZE 18K (CONT) Top panel screw 5) Remove the right side plate screws and remove the right side plate. Left plate screw Right rear plate screw Top panel screw Motor holder screw...
  • Page 60 DISASSEMBLY INSTRUCTIONS SIZE 18K (CONT) Fan ass’y How to remove the fan Electronic control box ass’y. 1) After you remove the panel plate (see section 1), remove the hex nut securing the fan and then remove the fan. Compressor and Two reactors liquid-gas separator Nut securing the fan...
  • Page 61 DISASSEMBLY INSTRUCTIONS SIZE 18K (CONT) 4) Remove the fan motor screws (4). 5) Remove the fan motor. Four screws Electrical How to remove the parts electrical parts. 1) Complete the steps in sections 1 and 2, then remove the two compressor connectors and the compressor...
  • Page 62 DISASSEMBLY INSTRUCTIONS SIZE 18K (CONT) 3) Remove the reactor connector. 4) Remove the grounding screw. 5) Remove the power supply wires (L1,L2,S). 6) Remove the electronic control box.
  • Page 63 DISASSEMBLY INSTRUCTIONS SIZE 18K (CONT) Four-way How to remove the valve four-way valve. The picture of four-way valve may be different from Complete the the one on your side. steps in sections 1,2, and 3. Four-way Recover the valve refrigerant from Welded the refrigerant parts...
  • Page 64 DISASSEMBLY INSTRUCTIONS SIZES 24K − 30K Part name Procedures Remarks Panel plate How to remove the panel plate. Top panel screws 1) Stop the air conditioner operation and turn “OFF” the power breaker. 2) Refer to the photos on the right Front panel screws to locate the panel screws.
  • Page 65 DISASSEMBLY INSTRUCTIONS SIZES 24K − 30K (CONT) Top panel screws 5) Remove the right side plate screws and remove the right side plate. Front panel screws Top panel screws Right side panel screws Electronic control box Motor holder screws...
  • Page 66 DISASSEMBLY INSTRUCTIONS SIZES 24K − 30K (CONT) Fan ass’y How to remove the fan ass’y. 1) After removing the panel plate (see section 1), remove the hex nut securing the fan and remove the fan. Compressor and liquid-gas separator Nut securing the fan...
  • Page 67 DISASSEMBLY INSTRUCTIONS SIZES 24K − 30K (CONT) 2) Remove the fan motor connector. 3) Remove the four screws and then remove the fan motor. Electrical How to remove the parts electrical parts. 1) Complete the steps in sections 1 and 2, then remove the compressor connector.
  • Page 68 DISASSEMBLY INSTRUCTIONS SIZES 24K − 30K (CONT) 2) Remove the screws securing the IPM board. 3) Release the three temp. sensor connectors. 4) Remove the two blue wires connected to the four way valve.
  • Page 69 DISASSEMBLY INSTRUCTIONS SIZES 24K − 30K (CONT) 5) Remove the compressor top temp. sensor connectors, condenser coil temp. sensor (T3),outdoor ambient temp. sensor (T4) and discharge temp. sensor (T5). Two blue wires of the four way valve 1) Remove the power supply wires (L1, L2, S).
  • Page 70 DISASSEMBLY INSTRUCTIONS SIZES 24K − 30K (CONT) Four-way How to remove the valve four-way valve. The picture of the four-way valve may differ from the 1) Complete the steps actual valve. in sections 1,2, and Four-way valve 2) Recover the refrigerant from the Welded refrigerant circuit.
  • Page 71 DISASSEMBLY INSTRUCTIONS SIZES 24K − 30K (CONT) Compressor How to remove the compressor. 1) Complete the Discharge steps in sections 1, pipe and 2 and 3. suction 2) Remove the pipe discharge pipe and suction pipe with a burner. 3) Remove the hex nuts and washers securing the compressor on the...
  • Page 72 E2016 Bryant Heating & Cooling Systems D 7310 W. Morris St. D Indianapolis, IN 46231 Catalog No. SM538PR-01 Edition Date: 09/16 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

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