MrCool DIY-MULTI2-18HP230C Service Manual
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MrCool DIY-MULTI2-18HP230C Service Manual

4th generation multi-zone
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4TH GENERATION
MULTI-ZONE
SERVICE MANUAL

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Summary of Contents for MrCool DIY-MULTI2-18HP230C

  • Page 1 4TH GENERATION MULTI-ZONE SERVICE MANUAL...

  • Page 3: Table Of Contents

    Table of Contents §. Safety Precautions Precautions Information servicing (For flammable materials) §. Specifications Model Reference Pipe Length and Drop Height Indoor units combination Refrigeration Cycle Diagrams Electrical Wiring Diagrams §. Electronic Functions Abbreviation Electric Control Working Environment Main Protection Control and Functions §.
  • Page 4 §. Troubleshooting Safety Caution General Troubleshooting Complain Record Form Information Inquiry Outdoor Unit Point Check Function Error Diagnosis and Troubleshooting Without Error Code Quick Maintenance by Error Code Troubleshooting by Error Code Check Procedures Appendix Temperature Sensor Resistance Value Table for T1,T2,T3 and T4 (°C – K) Temperature Sensor Resistance Value Table for TP (°C –...
  • Page 6 Safety Precautions Contents Precautions ......................2 Information servicing (For flammable materials) ..........3...

  • Page 7: Safety Precautions

    1. Precautions CAUTION To prevent personal injury, or property or unit damage, • • While unpacking be careful of sharp edges around adhere to all precautionary measures and instructions the unit as well as the edges of the fins on the con- denser and evaporator.

  • Page 8: Information Servicing(For Flammable Materials)

    2. Information servicing(For • Prior to work taking place, the area around the equipment is to be surveyed to make sure that there are no flammable flammable materials) hazards or ignition risks. • NO SMOKING signs shall be displayed. Checks to the area Ventilated area •...
  • Page 9 • that capacitors are discharged: this shall be done in shall also take into account the effects of aging or a safe manner to avoid possibility of sparking; continual vibration from sources such as compressors or fans. • that there no live electrical components and wiring are exposed while charging, recovering or purging 2.13 Detection of flammable refrigerants the system;...
  • Page 10 • The refrigerant charge shall be recovered into the • Before attempting the procedure ensure that: correct recovery cylinders. The system shall be flushed • mechanical handling equipment is available, if with OFN to render the unit safe. This process may required, for handling refrigerant cylinders;...
  • Page 11 • Empty recovery cylinders are evacuated and, if • The recovered refrigerant shall be returned to the possible, cooled before recovery occurs. refrigerant supplier in the correct recovery cylinder, and the relevant Waste Transfer Note arranged. Do not • The recovery equipment shall be in good working mix refrigerants in recovery units and especially not in order with a set of instructions concerning the cylinders.

  • Page 12: Pipe Length And Drop Height

    Specifications Contents Model Reference ....................2 Pipe Length and Drop Height ................3 Indoor units combination ..................4 Refrigeration Cycle Diagrams ................5 Electrical Wiring Diagrams ..................7...

  • Page 13: Model Reference

    1. Model Reference Refer to the following table to determine the specific outdoor unit model. Outdoor Unit Model Capacity (Btu/h) Power Supply DIY-MULTI2-18HP230C DIY-MULTI3-27HP230C 208/230V~, 60Hz, 1Phase DIY-MULTI4-36HP230C DIY-MULTI5-48HP230C  Specifications 2 ...

  • Page 14: Pipe Length And Drop Height

    2. Pipe Length and Drop Height The length and elevation of connection pipe are shown in the table below. if the pipe length exceeds max pipe length, additional refrigerant should be charged to ensure nominal cooling/heating capacity. 1 drive 2 1 drive 3 1 drive 4 1 drive 5 Max.

  • Page 15: Indoor Units Combination

    3. Indoor units combination Indoor unit combination for M2OA-18HFN1-MQ1 One unit Two units 9+12 12+12 Indoor unit combination for M3OH-27HFN1-MQ1 One unit Two units Three units 9+9+9 9+12 9+9+12 9+18 9+9+18 12+12 9+12+12 12+18 12+12+12 18+18 Indoor unit combination for M4OH-36HFN1-MQ1 One unit Two units Three units...
  • Page 16 Four units Five units 9+9+9+9 9+9+12+12 9+12+12+12 12+12+12+12 9+9+9+9+9 9+9+9+12+24 9+9+9+12 9+9+12+18 9+12+12+18 12+12+12+18 9+9+9+9+12 9+9+12+12+12 9+9+9+18 9+9+12+24 9+12+12+24 12+12+12+24 9+9+9+9+18 9+9+12+12+18 9+9+9+24 9+9+12+30 9+12+12+30 12+12+18+18 9+9+9+9+24 9+12+12+12+12 9+9+9+30 9+9+18+18 9+12+18+18 9+9+9+12+12 12+12+12+12+12 9+9+9+36 9+9+18+24 9+12+18+24 9+9+9+12+18...

  • Page 17: Refrigeration Cycle Diagrams

    4. Refrigeration Cycle Diagrams Refrigeration Cycle Diagram of inverter 1 drive 2 type Refrigeration Cycle Diagram of inverter 1 drive 3 type...
  • Page 18 Refrigeration Cycle Diagram of inverter 1 drive 4 type Refrigeration Cycle Diagram of inverter 1 drive 5 type...

  • Page 19: Electrical Wiring Diagrams

    5. Electrical Wiring Diagrams Outdoor unit wiring diagram Outdoor Unit ODU Model ODU Wiring Diagram 16022000035644 DIY-MULTI2-18HP230C 16022300002514 DIY-MULTI3-27HP230C DIY-MULTI4-36HP230C 16022300002633 16022000036851 DIY-MULTI5-48HP230C Outdoor unit printed circuit board diagram Outdoor Unit ODU Model ODU Printed Circuit Board IPM Printed Circuit Board...
  • Page 20 5(8)
  • Page 24 Outdoor unit printed circuit board diagram: 17122000051368...
  • Page 25 Name Meaning CN11 L_in: connect to N-line (208-230V AC input) Power Supply CN12 N_in: connect to L-line (208-230V AC input) EEV-A EEV-B connect to electric expansion valve EEV-C CN34 EEV-D CN10 CN13 S: connect to indoor unit communication(pin1-pin2: 24VDC Pulse wave; pin2-pin3: 208-230V AC input) CN15 CN21...
  • Page 26 Name Meaning connect to compressor COMPRESSOR 0V AC (standby) 10-200V AC (running) DC-FAN CN32 connect to DC fan Note: This section is for reference only. Please take practicality as standard.
  • Page 27 Outdoor unit printed circuit board diagram: 17122300001076...
  • Page 28 Name Meaning T3: condenser temperature sensor T3/T4 CN17 T4: outdoor ambient temperature sensor connect to discharge sensor Test Port CN26 connect to DR board CN1 Red: low pressure protect LOW/HIGH CN14 Yellow: high pressure protect Comp Top CN12 compressor top temperature sensor L-OUT L-OUT connect to IPM board CN4...
  • Page 29 Outdoor unit IPM board diagram: 17122000018251...
  • Page 30 Name Meaning connect to main board L-Out connect to main board N-Out CN_Reactor CN2/CN3 connect to reactor CN_COMP CN_COMP connect to compressor connect to main board CN21 FAN_DC CN14 connect to outdoor DC fan Note: This section is for reference only. Please take practicality as standard.
  • Page 31 Outdoor unit printed circuit board diagram: 17122000037804...
  • Page 32 Name Meaning L1_in: connect to L1-line (230V AC input) Power Supply L2_in: connect to L2-line (230V AC input) Exhaust temp. sensor TP TESTPORT CN35 used for testing HEAT1 CN19/CN20 connect to chassis heater, 208-230V AC when is ON HEAT2 CN24/CN25 connect to compressor heater, 208-230V AC when is ON 4-WAY CN17/CN18...
  • Page 33 Outdoor unit IPM board diagram: 17122000042012...
  • Page 34 Name Meaning connect to main board L-Out Power Supply connect to main board N-Out connect to main board CN6 FAN_DC FAN_1/FAN_2 connect to outdoor DC fan 1& DC fan 2 CN_COMP connect to compressor Note: This section is for reference only. Please take practicality as standard.
  • Page 35 Electronic Functions Contents Abbreviation ......................2 Electric Control Working Environment ..............2 Main Protection .....................2 Control and Functions ...................3...
  • Page 36 1. Abbreviation then restart untill TP<90°C (194°F). R32 models:TA=100°C (212°F), TB=103°C (217.4°F), Unit element abbreviations 108°C (226.4°F) Abbreviation Element Other models: TA=105°C (221°F), TB=110°C (230°F), 115°C (239°F) Indoor room temperature Middle indoor heat exchanger coil Voltage Limit Protection temperature Indoor heat exchanger exhaust coil If AC voltage registers below stop value for an extended temperature (located on the outdoor period of time, the corresponding error code is displayed...
  • Page 37 3.4.2 Heating mode: 2. The EXV continues at 300p while indoor units maintain their operation. If the outdoor ambient temperature is higher than the set frequency during oil return, the unit stops the oil return process. Low Outdoor Ambient Temperature Protection •...
  • Page 38 Total capacity Request=∑Capacity request of indoor unit Note: The final result is an integer. If ucOutHP <1, round /40× modify rate(ucOutHP) down, otherwise round up. Note: The final result is an integer. If ucOutHP <1, round Outdoor Fan Control down, otherwise round up. 4.2.1 Cooling Mode 4.1.2...
  • Page 39 4.2.2 Heating Mode • Failure or protection (excluding discharge temperature protection and high/low pressure protection) causes the four-way valve to immediately shut down. Breeze fan speed Supper low fan speed Low fan speed Middle fan speed High fan speed Supper high fan speed To meet T4>T4HeatLimit_ADD_3, first determine the initial fan based on T4.
  • Page 40 Outdoor Unit Disassembly Contents Outdoor Unit Table ....................2 Dimension ......................3 Outdoor Unit Disassembly ..................9 Panel Plate .....................9 Electrical Parts .....................20 Fan Assembly ....................37 Fan Motor ....................38 Sound blanket .....................39 Four-way valve .....................40 Compressor ....................41...

  • Page 41: Outdoor Unit Table

    1. Outdoor Unit Disassembly Outdoor Unit Table Outdoor Unit Model Panel Plate PCB Board X430 PCB board 6 DIY-MULTI2-18HP230C PCB board 2 DIY-MULTI3-27HP230C PCB board 2 DIY-MULTI4-36HP230C PCB board 7 DIY-MULTI5-48HP230C  Outdoor Unit Disassembly 2 ...

  • Page 42: Dimension

    2. Dimension 2.1. Panel Plate B30(1 drive 2)  Outdoor Unit Disassembly 3 ...
  • Page 43 2.2. Panel Plate CA30 (1 drive 2 &1 drive 3 &1 drive 4)  Outdoor Unit Disassembly 4 ...
  • Page 44 for US models) 2.3. Panel Plate CA30 (1 drive 2,  Outdoor Unit Disassembly 5 ...
  • Page 45 2.4. Panel Plate D30 (1 drive 2 &1 drive 3 &1 drive 4 &1 drive 5)  Outdoor Unit Disassembly 6 ...
  • Page 46 for US models 2.5. Panel Plate D30 (1 drive 3 &1 drive 4,  Outdoor Unit Disassembly 7 ...
  • Page 47 2.6. Panel Plate X330 (1 drive 2)  Outdoor Unit Disassembly 8 ...
  • Page 48 2.7. Panel Plate X430 (1 drive 3)  Outdoor Unit Disassembly 9 ...
  • Page 49 for US models 2.8. Panel Plate X430 (1 drive 2,  Outdoor Unit Disassembly 10 ...
  • Page 50 for US models 2.6. Panel Plate E30 (1 drive 5,  Outdoor Unit Disassembly 11 ...

  • Page 51: Outdoor Unit Disassembly

    3. Outdoor Unit Disassembly Panel Plate 1. D30 Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove three screws and then remove Shield the shield. (see CJ_Multi_D30-001). CJ_Multi_D30-001 Big Handle For US models, remove four screws and then remove the big handle.
  • Page 52 Procedure Illustration 3) Remove the screws of the top cover and then remove the top cover (4 screws). Two of the screws is located underneath the big handle (see CJ_ Multi_D30-002). CJ_Multi_D30-002 4) Remove the screws of the front right panel and then remove the front right panel (2 screws) (see CJ_Multi_D30- 003).
  • Page 53 Procedure Illustration 5) Remove the screws of the front panel and then remove the front panel (9 screws) (see CJ_Multi_D30-004). Front Panel CJ_Multi_D30-004 6) Remove the screws of the rear net and then remove the rear net (6 screws) CJ_ Multi_ D30-005). (for some (see models) CJ_Multi_D30-005...
  • Page 54 Procedure Illustration 7) Remove the screws of the right panel and then remove the right panel (12 screws) (see CJ_multi_D30-006 and CJ_Multi_D30-007). Right Panel CJ_Multi_D30-006 CJ_Multi_D30-007 Note: This section is for reference only. Actual unit appearance may vary.  Outdoor Unit Disassembly 15 ...
  • Page 55 3. B30 Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screw of the shield and then remove it.(1 screw) (see CJ_ Multi_B30 -001). Shield CJ_Multi_B30-001 3) Remove the screws of the top cover and then remove the top cover (3 screws).
  • Page 56 Procedure Illustration 4) Remove the screws of the front panel and then remove the front panel (8 CJ_Multi_B30-003 ). screws) (see CJ_Multi_B30-003 5) Remove the screws of the right panel CJ_Multi_B30-004). (10 screws) (see CJ_Multi_B30-004 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 57 4. CA30 Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screws of the shield and then remove it.(3 screws) (see Multi_CA30-001 ). Shield CJ_Multi_CA30-001 3) Remove the screws of the top cover and then remove the top cover (3 screws).
  • Page 58 Procedure Illustration 4) Remove the screws of the front panel and then remove the front panel (7 Multi_ CA30-003). screws) (see CJ_ CJ_Multi_ CA30 -003 5) Remove the screws of the right panel and then remove the right panel (12 screws) (see CJ_CA30_004). CJ_Multi_ CA30 -004 Note: This section is for reference only.
  • Page 59 4. E30 Procedure Illustration Big Handle 1) Turn off the air conditioner and the power breaker. 2) Remove the screws of the big handle and then remove it.(3 screws) (see CJ_Multi_E30-001 ). 3) Remove the screws of the water collecting cover and then remove it.(3 CJ_Multi_E30-001 ).
  • Page 60 Procedure Illustration 5) Remove the two screws of the right front panel and then push it down to unhook the right fornt pannel from Multi_ E30- the nine hooks.(see CJ_ 003). CJ_Multi_E30-003 6) Remove the seven screws of the front panel and then remove the front panel Multi_ E30-004).
  • Page 61 Procedure Illustration 1) Unfix the screws on the right side of the right panel.(9 screws)(see Multi_E30-005 ). CJ_Multi_E30-005 2) Remove the screws on the back of the right panel and then remove the right panel and rear net.(9 screws).(see Multi_ E30-006). CJ_Multi_E30-006 Note: This section is for reference only.
  • Page 62 5. X330 Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screw of the shield and then remove it.(1 screw) (see CJ_ Multi_X330_001). CJ_Multi_X330_001 3) Remove the screws of the top cover and then remove the top cover (4 screws).
  • Page 63 Procedure Illustration 4) Remove the screws of the front panel and then remove the front panel (8 screws) (see CJ_Multi_X330_003). CJ_Multi_X330_003 5) Remove the screws of the right panel and then remove the right panel (9 screws) (see CJ_Multi_X330_005). CJ_Multi_X330_004 Note: This section is for reference only.
  • Page 64 X430 Procedure Illustration 1) Turn off the air conditioner and the power breaker. 2) Remove the screws of the shield and then remove it.(4 screws). For US models, remove the screws of big handle assembly and water collector then remove them.(6 screws) (see CJ_Multi_X430_001).
  • Page 65 Procedure Illustration 4) Remove the screws of the front panel and then remove the front panel (7 screws) (see CJ_Multi_X430_003). CJ_Multi_X430_003 5) Remove the screws of the right panel and then remove the right panel (14 screws, two of them are used to fix the optional rear net) (see CJ_Multi_ X430_004).

  • Page 66: Electrical Parts

    Electrical parts Antistatic gloves must be worn when you disassemble the electronic box. WARNING: Note: Remove the air outlet grille(refer to 1.1 Panel Plate) before disassembling electrical parts. PCB Board 1 Procedure Illustration 1) Remove the screws of the ground CJ_Multi- wirings.
  • Page 67 Procedure Illustration 3) Disconnect the connector for outdoor DC fan from the electronic control CJ_Multi-PCB_001-3 ). board (see 4) Remove the connector for the CJ_Multi- compressor (see PCB_001-3 ). 5) Pull out the two blue wires connected CJ_Multi- with the four way valve (see PCB_001-3 ).
  • Page 68 PCB Board 2 Procedure Illustration 1) Remove the screws of the top cover. CJ_Multi-PCB_002-1 ). (2 screws) ( CJ_Multi-PCB_002-1 2) Unfix the screws and then turn over the IPM board (4 screws ) (see Multi-PCB_002-2 ). CJ_Multi-PCB_002-2 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 69 Procedure Illustration 3) Disconnect the connector for outdoor DC fan from the electronic control CJ_Multi-PCB_002-3 ). board (see 4) Remove the connector for the CJ_Multi- compressor (see PCB_002-4 ). 5) Pull out the two blue wires connected Compressor with the four way valve (see CJ_Multi- PCB_002-4 ).
  • Page 70 PCB board 3 Procedure Illustration 1) Remove the screws of the top CJ_Multi- cover. (2 screws) (see PCB_003-1 ). CJ_Multi-PCB_003-1 2) Unfix the hooks and then open the electronic control box cover (4 hooks) CJ_Multi-PCB_003-2 ). (see 3) Disconnect the connector for fan motor from the electronic control CJ_Multi-PCB_003-3 ).
  • Page 71 Procedure Illustration 9) Unfix the hooks and then remove the electronic installing box . (2 screws) CJ_Multi_PCB_003-4）. (see CJ_Multi-PCB_003-4 10) Remove one screw of module board. (see CJ_Multi_PCB_003-5 ). CJ_Multi-PCB_003-5 Electronic expansion valve 11) Disconnect the connectors of the CJ_Multi_ module board.
  • Page 72 PCB board 4 Procedure Illustration 1) Remove the screws and then remove the reactor 1. (2 screws) (see Multi_PCB_004-1 ). CJ_Multi-PCB_004-1 2) Remove the screws and then CJ_Multi_ remove the reactor 2 (see PCB_004-2 ). CJ_Multi-PCB_004-2 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 73 Procedure Illustration 3) Unfix five screws and then remove CJ_Multi_ the radiating pipe. (see PCB_004-3 ). 4) Unfix two screws on the main board CJ_Multi_PCB_004-3 ). (see 5) Disconnect the connectors on the main board.(see CJ_Multi_PCB_004- 3 ). CJ_Multi-PCB_004-3 6) Unfix two screws on the upper board CJ_Multi_PCB_004-4 ).
  • Page 74 Procedure Illustration 8) Unfix two screws on the bottom CJ_Multi_PCB_004-5 ). board. (see 9) Disconnect the connectors on CJ_Multi_ the bottom board (see PCB_004-5 ). CJ_Multi-PCB_004-5 Note: This section is for reference only. Actual unit appearance may vary.  Outdoor Unit Disassembly 35 ...
  • Page 75 PCB board 5 Procedure Illustration 1) Disconnect the connector for compressor and release the ground CJ_ODU_Multi_ wire(1 screw). (see PCB_005-1 ). 2) Pull out the wires from electrical supporting plate and turn over the CJ_ODU_Multi_PCB_005-1 electronic control assembly. (see CJ_ODU_Multi_PCB_005-2 ). CJ_ODU_Multi_PCB_005-2 3) Remove the electronic installing box CJ_ODU_...
  • Page 76 Procedure Illustration 4) Remove the fixing board (2 hooks) CJ_ODU_Multi_PCB_005-4 ). (see CJ_ODU_Multi_PCB_005-4 5) Disconnect the connectors from the electronic control board (see CJ_ODU_Multi_PCB_005-5 ). CJ_ODU_Multi_PCB_005-5 6) Then remove the electronic control CJ_ODU_Multi_ board (4 hooks).(see PCB_005-6 ). CJ_ODU_Multi_PCB_005-6 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 77 Procedure Illustration 7) Unfix the hooks and then remove the electronic installing box . (2 screws) CJ_Multi_PCB_005-7）. (see CJ_Multi-PCB_005-7 8) Remove one screw of module board. (see CJ_Multi_PCB_005-8 ). CJ_Multi-PCB_005-8 9) Disconnect the connectors of the CJ_Multi_ module board. (see PCB_005-9 ).
  • Page 78 PCB board 6 Procedure Illustration 1) Remove 5 screws of the cover of electrical control box cover and CJ_ODU_Multi_ remove it. (see PCB_006-1 ). CJ_ODU_Multi_PCB_006-1 2) Cut the ribbon by a shear and disconnect the 4-way valve CJ_ODU_Multi_ connector. (see PCB_006-2 ).
  • Page 79 Procedure Illustration 4) Remove the electronic installing box CJ_ODU_ subassembly (4 hooks) (see Multi_PCB_006-4 ). CJ_ODU_Multi_PCB_006-4 5) Remove the support of electronic control box.(see CJ_ODU_Multi_ PCB_006-5 ). CJ_ODU_Multi_PCB_006-5 Note: This section is for reference only. Actual unit appearance may vary. ...
  • Page 80 Procedure Illustration 6) Disconnect the connectors from the electronic control board (see CJ_ODU_Multi_PCB_006-6 ). 7) Remove 2 screws and then remove the electronic control board.(see CJ_ODU_Multi_PCB_006-6 ). CJ_ODU_Multi_PCB_006-6 8) Pull out the connector, remove one screw and then remove the key board subassembly on terminal CJ_Multi_PCB_006-7 ).

  • Page 81: Fan Assembly

    Fan Assembly Note: Remove the panel plate (refer to 1.1 Panel Plate) before disassembling fan. Procedure Illustration 1) Remove the nut securing the fan with a spanner (see CJ_ODU_ FAN_001). 2) Remove the fan. CJ_ODU_FAN_001 Note: This section is for reference only. Actual unit appearance may vary. ...

  • Page 82: Fan Motor

    Fan Motor Note: Remove the panel plate and the connection of fan motor on PCB (refer to 1.1 Panel Plate and 1.2 Electrical parts) before disassembling fan motor. Procedure Illustration 3) Remove the fixing screws of the fan motor (4 screws) (see CJ_ODU_MOTOR_001). 4) Remove the fan motor.

  • Page 83: Sound Blanket

    Sound blanket Note: Remove the panel plate (refer to 1.1 Panel plate) before disassembling sound blanket. Procedure Illustration 1) Remove the sound blanket (side and top) (see CJ_ODU_BLANKET_001). Sound Blanket(top) Sound Blanket(side) CJ_ODU_BLANKET_001 Note: This section is for reference only. Actual unit appearance may vary. ...

  • Page 84: Four-Way Valve

    Four-way valve (for heat pump models) WARNING: Evacuate the system and confirm that there is no refrigerant left in the system before removing the four-way valve and the compressor. (For R32 & R290, you should evacuate the system with the vacuum pump; flush the system with nitrogen;...

  • Page 85: Compressor

    Compressor WARNING: Evacuate the system and confirm that there is no refrigerant left in the system before removing the four-way valve and the compressor. (For R32 & R290, you should evacuate the system with the vacuum pump; flush the system with nitrogen; then repeat the two steps before heating up the brazed parts. The operations above should be implemented by professionals.) Note: Remove the panel plate, connection of compressor on PCB (refer to 1.1 Panel plate and 1.2 Electrical parts) before disassembling sound blanket.
  • Page 86 Procedure Illustration 3) Remove the hex nuts and washers securing the compressor, located on the bottom plate (see CJ_ODU_COMP_003). CJ_ODU_COMP_003 Suction Pipe 4) Heat up the brazed parts and then remove the the discharge pipe and the suction pipe (see CJ_ODU_COMP_004). Discharge Pipe 5) Lift the compressor from the base pan assembly with pliers.
  • Page 87 Troubleshooting Contents Safety Caution .......................3 General Troubleshooting ..................4 Error Display (Indoor Unit) ................4 Error Display (Outdoor Unit) ................6 Complain Record Form ..................7 Information Inquiry ....................9 Outdoor Unit Point Check Function ..............12 Error Diagnosis and Troubleshooting Without Error Code .......18 Remote maintenance ...................18 Field maintenance ..................19 Quick Maintenance by Error Code ..............24 Troubleshooting by Error Code ................27...
  • Page 88 Troubleshooting Contents PC 01(Over voltage or too low voltage protection)/PC 10(Outdoor unit low AC voltage protection)/PC 11(Outdoor unit main control board DC bus high voltage protection)/PC 12(Outdoor unit main control board DC bus high voltage protection /341 MCE error) Diagnosis and Solution 38 PC40(Communication malfunction between IPM board and outdoor main board diagnosis and solution) ................40 (ODU)PC 0F(PFC module protection diagnosis and solution) ......41...

  • Page 89: Safety Caution

    1. Safety Caution WARNING Be sure to turn off all power supplies or disconnect all wires to avoid electric shock. While checking indoor/outdoor PCB, please equip oneself with antistatic gloves or wrist strap to avoid damage to the board. WARNING Electricity remains in capacitors even when the power supply is off.

  • Page 90: General Troubleshooting

    2. General Troubleshooting Error Display (Indoor Unit) When the indoor unit encounters a recognized error on different models , 1. the running LED with flash in a corresponding series, the timer LED may turn on or begin flashing; 2. an error code will be displayed; 3.
  • Page 91 For other errors: The display board may show a garbled code or a code undefined by the service manual. Ensure that this code is not a temperature reading. Troubleshooting: Test the unit using the remote control. If the unit does not respond to the remote, the indoor PCB requires replacement. If the unit responds, the display board requires replacement.

  • Page 92: Error Display (Outdoor Unit)

    Error Display (Outdoor unit) Display Malfunction or Protection Solution Defrosting Normal Display, not Forced cooling error code Outdoor EEPROM malfunction TS27 EC 51 Indoor / outdoor units communication error TS28 EL 01 Communication malfunction between IPM board and outdoor main board TS40 PC 40 Outdoor overcurrent protection...

  • Page 93: Complain Record Form

    3. Complain Record Form Complain Record Form Request No.: Date: Installation Date: Service Date: Customer Information Name Telephone No. Home Address Email Product Information Indoor Unit Model Outdoor Unit Model Serial No. of indoor unit Serial No. of outdoor unit Working Mode □Cooling □Heating...
  • Page 94 Parameter Checking information by Remote controller Displaying code Displaying code meaning Display value Display value meaning Room temperature Indoor coil temperature Outdoor coil temperature Ambient temperature Outlet temperature of indoor coil Discharge temperature Sunction temperature Targeted Frequency Actual Frequency Indoor fan speed Outdoor fan speed EXV opening steps Compressor continuous run-...

  • Page 95: Information Inquiry

    4. Information Inquiry • To enter information inquiry status, complete the following procedure within 10 seconds: • Press LED 3 times. • Press SWING 3 times. • Finish 1 and 2 within 10 seconds, you will hear beeps for two seconds, which means the unit goes into parameter checking mode.
  • Page 96 Displayed Displayed code Explanation Meaning Additional Notes value 1. All displayed temperatures Room temperature use actual values. Indoor coil temperature 2. All temperatures are -1F,-1E,-1d,-1c,- -25,-24,-23,-22, displayed in °C regardless Outdoor coil 1b,-1A -21,-20 of remote used. temperature -19—99 -19—99 3.
  • Page 97 Displayed Displayed code Explanation Meaning Additional Notes value 0-FF 2-28 Reserved 5-20 5-25  Troubleshooting 11 ...

  • Page 98: Outdoor Unit Point Check Function

    5. Outdoor Unit Point Check Function • A check switch is included on the outdoor PCB. • Push SW1 to check the unit’s status while running. The digital display shows the following codes each time the SW1 is pushed. For some models, Number of Display Remark...
  • Page 99 Indoor unit A evaporator outlet temperature (T2BA) Indoor unit B evaporator outlet temperature (T2BB) If the temperature is lower than -9 C, the digital display Indoor unit C evaporator outlet shows “-9.” If the temperature is higher than 70 C, the digital temperature (T2BC) display shows “70.”...
  • Page 100 EXV open angle for A indoor unit EXV open angle for B indoor Actual data/4. unit If the value is higher than 99, the digital display shows single EXV open angle for C indoor and double digits. unit For example, if the digital display shows “2.0”, the EXV open EXV open angle for D indoor angle is 120×4=480p.
  • Page 101 For key board models, Number of Display Remark Presses Normal display Displays running frequency, running state, or malfunction code Display Number of indoor unit Quantity of indoor units with working connection Outdoor unit running mode Stanby: 0,Fan only: 1, Cooling: 2, Heating: 3, Forced cooling: code 4, Forced defrostling: A Indoor unit A capacity...
  • Page 102 Indoor unit A room temperature (T1A) Indoor unit B room temperature (T1B) If the temperature is lower than 0 C, the digital display shows Indoor unit C room “0.” If the temperature is higher than 70 C, the digital display temperature (T1C) shows “70.”...
  • Page 103 Frequency limit caused by The display value is a Bit7 IGBT radiator hexidecimal number. For example, the Bit6 Frequency limit caused by PFC digital display show Bit5 Frequency limit caused by T4. 2A, then Bit5=1, Bit4 Frequency limit caused by T2. Bit3=1, and Bit1=1.

  • Page 104: Error Diagnosis And Troubleshooting Without Error Code

    6. Error Diagnosis and Troubleshooting Without Error Code WARNING Be sure to turn off unit before any maintenance to prevent damage or injury. Remote maintenance SUGGESTION: When troubles occur, please check the following points with customers before field maintenance. Problem Solution Unit will not start Page 20~21...
  • Page 105 Problem Solution Unit will not start Page 22~23 Compressor will not start but fans run Page 22~23 Compressor and condenser (outdoor) fan will not start Page 22~23 Evaporator (indoor) fan will not start Page 22~23 Condenser (Outdoor) fan will not start Page 22~23 Unit runs, but shortly stops Page 22~23...
  • Page 106 1.Remote Maintenance Electrical Circuit Refrigerant Circuit Possible causes of trouble Unit will not start ☆ ☆ ☆ ☆ The power switch is on but fans will not start ☆ ☆ ☆ The temperature on the display board cannot be set ☆...
  • Page 107 1.Remote Maintenance Others Possible causes of trouble Unit will not start The power switch is on but fans will not start ☆ The temperature on the display board cannot be set Unit is on but the wind is not cold(hot) Unit runs, but shortly stops The unit starts up and stops frequently ☆...
  • Page 108 2.Field Maintenance Refrigerant Circuit Others Possible causes of trouble Unit will not start Compressor will not start but fans run ☆ Compressor and condenser (outdoor) fan will not start Evaporator (indoor) fan will not start Condenser (Outdoor) fan will not start Unit runs, but shortly stops ☆...

  • Page 109: Field Maintenance

    2.Field Maintenance Electrical Circuit Possible causes of trouble Unit will not start ☆ ☆ ☆ ☆ ☆ ☆ Compressor will not start but fans run ☆ ☆ ☆ ☆ ☆ Compressor and condenser (outdoor) fan will not start ☆ ☆ ☆...

  • Page 110: Quick Maintenance By Error Code

    7. Quick Maintenance by Error Code If you do not have the time to test which specific parts are faulty, you can directly change the required parts according the error code. You can find the parts to replace by error code in the following table. Error Code Part requiring replacement...
  • Page 111 Error Code Part requiring PC 08/(O)PC replacement EC 07/ PC 00/PC PC 01/(O)PC 10/PC (O)PC 0F EC 51 EC 56 44/ PC 46/ PC (O)EC 71 11/PC 12 Outdoor PCB Outdoor fan motor T3 Sensor T4 Sensor TP Sensor T2B Sensor Reactor or inductance Compressor IPM module board...
  • Page 112 Error Code Part requiring replacement PC 03/ (O)Pc 06 (O)Pc 0a (O)PC 30 PC 40 EC 72 PC 43 PC 45 (O)pc 31 Outdoor PCB Outdoor fan motor T3 Sensor T4 Sensor TP Sensor T2B Sensor Reactor or inductance Compressor IPM module board Bridge rectifier PFC module...

  • Page 113: Troubleshooting By Error Code

    8. Troubleshooting by Error Code EH 00 /EC 51 (EEPROM parameter error diagnosis and solution) Description: Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip. Recommended parts to prepare: • Indoor PCB • Outdoor PCB Troubleshooting and repair: EH 00 EC 51 Shut off the power supply and...

  • Page 114: El 01 (Indoor And Outdoor Units Communication Error Diagnosis And Solution)

    EL 01(Indoor and outdoor unit communication error diagnosis and solution) Description: Indoor unit does not receive the feedback from outdoor unit during 110 seconds and this condition happens 4 times continuously. Recommended parts to prepare: • Indoor PCB • Outdoor PCB •...
  • Page 115 Indoor / outdoor units communication error Start: Power off , then Power on the A/C by the Breaker. (reconnect the power wire). Is it still displaying the error code? Check wiring on the outdoor and indoor terminal follow the wiring Reconnect the wiring diagram.
  • Page 116 Remarks: • Use a multimeter to test the resistance of the reactor which does not connect with capacitor. • The normal value should be around zero ohm. Otherwise, the reactor must have malfunction. Note: The picture and the value are only for reference, actual condition and specific value may vary. ...

  • Page 117: Eh 03 / Ec 07 (Fan Speed Is Operating Outside Of The Normal Range )/Ec 71(Over Current Failure Of Outdoor Dc Fan Motor) Diagnosis And Solution

    EH 03 / EC 07 (Fan Speed Is Operating Outside of Normal Range)/EC 71(Over Current Failure of Outdoor DC Fan Motor) Diagnosis and Solution Description: When indoor / outdoor fan speed keeps too low or too high for a certain time, the LED displays the failure code and the AC turns off.
  • Page 118 Index: 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 value of the voltage is not in the range showing in below table, the PCB must has problems and need to be replaced. •...

  • Page 119: Eh 60/Eh 61/Ec 53/Ec 52/Ec 54/Ec 56 /(Odu)E4/Ec 50 (Open Circuit Or Short Circuit Of Temperature Sensor Diagnosis And Solution)

    EH 60/EH 61/EC 53/EC 52/EC 54/EC 56 /(ODU)EC 50 (Open circuit or short circuit of temperature sensor diagnosis and solution) Description: If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED displays the failure code. Recommended parts to prepare: •...

  • Page 120: Pc 08(Current Overload Protection)/Pc 44(Outdoor Unit Zero Speed Protection)

    PC 08(Current overload protection)/PC 44(Outdoor unit zero speed protection) /PC 46(Compressor speed has been out of control)/PC 49(Compressor overcurrent failure) Description: An abnormal current rise is detected by checking the specified current detection circuit. Recommended parts to prepare: • Outdoor PCB •...
  • Page 121 Current protection of compressor Was the protection activated in standby? Is the power voltage is Restart the unit when the power normal? supply returns to normal Is outdoor terminal voltage Is the power wiring Reconnect the normal？ wired correctly? power wiring Is the voltage between L and Are L and N wired Reconnect L and N...
  • Page 122 PC 00(IPM malfunction diagnosis and solution)&(IDU)PC 04(Inverter compressor drive error diagnosis and solution) Description: PC 00/(ODU)P6:When the voltage signal the IPM sends to the compressor drive chip is abnormal, the LED displays the failure code and the AC turns off. (IDU)PC 04:The driven chip cannot detect the right rotor position of compressor Recommended parts to prepare: •...
  • Page 123 IPM module protection IPM module protection Restart the unit when the power supply Restart the unit when the power supply Is the power voltage normal? Is the power voltage normal? returns to normal returns to normal Is the outdoor terminal voltage Are the power wires Reconnect the Is the outdoor terminal voltage...
  • Page 124 PC 01/E5(Over voltage or too low voltage protection)/PC 10(Outdoor unit low AC voltage protection)/PC 11(Outdoor unit main control board DC bus high voltage protection)/PC 12(Outdoor unit main control board DC bus high voltage protection /341 MCE error) Diagnosis and Solution Description: Abnormal increases or decreases in voltage are detected by checking the specified voltage detection circuit.
  • Page 125 Voltage protection Voltage protection Check whether the power Restart the unit when the power supply Check whether the power Restart the unit when the power supply voltage is normal. gets normal voltage is normal. gets normal Check the wiring of Check the wiring of Measure whether outdoor Measure whether outdoor...

  • Page 126: Pc40(Communication Malfunction Between Ipm Board And Outdoor Main Board Diagnosis And Solution)

    PC 40(Communication malfunction between IPM board and outdoor main board diagnosis and solution) Description: The main PCB cannot detect the IPM board. Recommended parts to prepare: • Connection wires • Outdoor PCB • IPM module board • Electric control box Troubleshooting and repair: Communication malfunction between IPM board and outdoor main board...

  • Page 127: Odu)Pc 0F(Pfc Module Protection Diagnosis And Solution)

    (ODU)PC 0F(PFC module protection diagnosis and solution) Description: Outdoor PCB detects PFC signal is low voltage or DC voltage is lower than 340V for 6s when quick check. Recommended parts to prepare: • Connection wires • Outdoor PCB • Inductance •...

  • Page 128: Odu)Pc 06(Temperature Protection Of Compressor Discharge Diagnosis And Solution)

    8.10 (ODU)PC 06(Temperature protection of compressor discharge diagnosis and solution) Description: When the compressor discharge temperature (T5) is more than 115 C for 10 seconds, the compressor ceases operation and does not restart until T5 is less than 90 Recommended parts to prepare: •...

  • Page 129: Odu)Pc 0A(High Temperature Protection Of Condenser Diagnosis And Solution)

    8.11 (ODU)PC 0A(High temperature protection of condenser diagnosis and solution) Description: The unit will stop when condenser temperature is higher than 65°C, and runs again when it is less than 52°C Recommended parts to prepare: • Connection wires • Condenser temperature sensor •...
  • Page 130 Check the connection Check the connection between temperature Correct the connection between temperature Correct the connection High temperature protection of sensor and PCB. High temperature protection of sensor and PCB. condenser condenser Check whether the Check whether the condenser temperature is condenser temperature is Check whether the Check whether the...

  • Page 131: Eh 02 (Zero Crossing Detection Error Diagnosis And Solution)

    8.12 EH 02 (Zero crossing detection error diagnosis and solution) Description: When PCB does not receive zero crossing signal feedback for 4 minutes or the zero crossing signal time interval is abnormal. Recommended parts to prepare: • Connection wires • Indoor main PCB Troubleshooting and repair: Check the connections and power supply.
  • Page 132 8.13 PC 02 (Top temperature protection of compressor diagnosis and solution) Description: If the sampling voltage is not 5V, the LED will display the failure. Recommended parts to prepare: • Connection wires • Overload protector • Outdoor PCB Troubleshooting and repair: Check if the air flow system Clear up the air inlet and outlet or the heat of indoor and outdoor units...

  • Page 133: Idu)Pc 03/(Odu)Pc 30 (High Pressure Protection Diagnosis And Solution)

    8.14 (IDU)PC 03/(ODU)PC 30 (High pressure protection diagnosis and solution) Description: Outdoor pressure switch cut off the system because high pressure is higher than 4.4 MPa Recommended parts to prepare: • Connection wires • Pressure switch • Outdoor fan • Outdoor main PCB Troubleshooting and repair: ...
  • Page 134 High pressure protection High pressure protection Are the high pressure switch Are the high pressure switch Connect high pressure switch and Connect high pressure switch and and main control boar wired and main control boar wired mian control board mian control board correctly? correctly? Is the high pressure...

  • Page 135: Idu)Pc 03/(Odu)Pc

    8.15 (IDU)PC 03/(ODU)PC 31 (Low pressure protection diagnosis and solution) Description: Outdoor pressure switch cut off the system because low pressure is lower than 0.13 MPa, the LED displays the failure code. Recommended parts to prepare: • Connection wires • Outdoor PCB •...
  • Page 136 Low pressure protection Low pressure protection Are the low pressure protector Are the low pressure protector and main control board wired and main control board wired Reconnect the low pressure protector and main Reconnect the low pressure protector and main properly? properly? control board...

  • Page 137: Ec 72 (Lack Phase Failure Of Outdoor Dc Fan Motor Diagnosis And Solution)

    8.16 EC 72 (Lack phase failure of outdoor DC fan motor diagnosis and solution) Description: When the three-phase sampling current of the DC motor is abnormal, especially when the current of one or more phases is always small and almost 0, the LED displays the failure code. Recommended parts to prepare: •...

  • Page 138: Pc 43 (Outdoor Compressor Lack Phase Protection Diagnosis And Solution)

    8.17 PC 43 (Outdoor compressor lack phase protection diagnosis and solution) Description: When the three-phase sampling current of the compressor is abnormal, especially when the current of one or more phases is always small and almost 0, the LED displays the failure code Recommended parts to prepare: •...

  • Page 139: Pc 45 (Outdoor Unit Ir Chip Drive Failure Diagnosis And Solution)

    8.18 PC 45 (Outdoor unit IR chip drive failure diagnosis and solution) Description: When the IR chip detects its own parameter error, the LED displays the failure code when power on. Recommended parts to prepare: • Inverter module PCB. Troubleshooting and repair: Power off,then restart the unit 2 minutes later.

  • Page 140: Check Procedures

    8. Check Procedures 8.1 Temperature Sensor Check WARNING Be sure to turn off all power supplies or disconnect all wires to avoid electric shock. Operate after compressor and coil have returned to normal temperature in case of injury. 1. Disconnect the temperature sensor from PCB (Refer to Chapter 5&6. Indoor&Outdoor Unit Disassembly). 2.
  • Page 141 Resistance Value KSN133D42UFZ ATN150D30UFZA ATF235D22UMT GKT176MBH KTM240D57UMT Blue-Red Blue-Black 1.82Ω 1.03Ω Ω Ω Ω 0.75 1.75 0.62 Red-Black Resistance ATM150D23UFZ ATF235D22UMT ATF310D43UMT ATQ360D1UMU EAPQ420D1UMUA KTM180D68UMT Value Blue-Red Blue-Black 1.72Ω 0.75Ω Ω Ω Ω 1.91 Ω 0.65 0.37 0.37 Red-Black Resistance Value ASM135D23UFZ KTF310D43UMT KSN140D21UFZ...
  • Page 142 IPM Continuity Check WARNING Electricity remains in capacitors even when the power supply is off. Ensure the capacitors are fully discharged before troubleshooting. 1. Turn off outdoor unit and disconnect power supply. 2. Discharge electrolytic capacitors and ensure all energy-storage unit has been discharged. 3.
  • Page 143 Normal voltage of P and N 208-240V(1-phase,3-phase) 380-415V(3-phase) In standby around 310VDC around 530VDC In operation With passive PFC module With partial active PFC With fully active PFC module module >200VDC >310VDC >370VDC >450VDC Reactor Check Measure the resistance and voltage (to ground) of the reactor. The normal resistance should be around 0.1 ohm. Otherwise, the reactor must have malfunction.
  • Page 144 EXV Check 1. Turn off outdoor unit and disconnect power supply. 2. Disconnect the connectors of EXV. 3. Measure the resistance value between Red and Blue(Yellow); Brown and Orange(White). Resistance to EXV coil Color of lead wire Normal Value Red- Blue Red - Yellow About 50Ω...
  • Page 145 Appendix Contents Temperature Sensor Resistance Value Table for T1, T2, T3, and T4 (°C – K) ..2 Temperature Sensor Resistance Value Table for TP (for some units)(°C --K) ..3 iii) Pressure On Service Port ..................4...
  • Page 146 i) Temperature Sensor Resistance Value Table for T1,T2,T3 and T4 (°C – K) °C °F 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 11.5 2.19073 0.59386 96.3423 10.9731...
  • Page 147 ii) Temperature Sensor Resistance Value Table for TP(for some units) (°C --K) °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm...
  • Page 148 iii) Pressure On Service Port Cooling chart(R410A): ODU(DB) °F(°C) 0(-17) 5(-15) 95 (35) (-9.44) (7.22) (23.89) (29.44) (40.56) (46.11) (48.89) IDU(DB/WB) 70/59 (21.11/15) 10.1 10.6 75/63 (23.89/17.22) 10.7 11.2 80/67 (26.67/19.44) 11.2 11.9 90/73 (32.22/22.78) 10.5 10.3 10.0 10.6 12.4 13.0 70/59 (21.11/15) 75/63 (23.89/17.22)
  • Page 149 Heating chart(R410A): ODU(DB/WB) 57/53 47/43 37/33 27/23 17/13 (-8.33/- 0/-2 -17/-18 °F(°C) (13.89/11.67) (8.33/6.11) (2.78/0.56) (-2.78/-5) 10.56) (-17/-19) (-27/-28) IDU(DB) 55(12.78) 30.3 28.5 25.3 22.8 20.8 18.5 16.5 65(18.33) 32.5 30.0 26.6 25.4 23.3 20.5 19.0 75(23.89) 33.8 31.5 27.8 26.3 24.9 21.5...
  • Page 150 Cooling chart(R22): ODU(DB) °F(°C) 0(-17) 5(-15) 95 (35) (-9.44) (7.22) (23.89) (29.44) (40.56) (46.11) (48.89) IDU(DB/WB) 70/59 (21.11/15) 75/63 (23.89/17.22) 80/67 (26.67/19.44) 90/73 (32.22/22.78) 70/59 (21.11/15) 75/63 (23.89/17.22) 80/67 (26.67/19.44) 90/73 (32.22/22.78) 70/59 (21.11/15) 0.40 0.41 0.46 0.50 0.51 0.49 0.51 0.54 0.63...
  • Page 151 Heating chart(R22): ODU(DB/WB) 57/53 47/43 37/33 27/23 17/13 (-8.33/- 0/-2 -17/-18 °F(°C) (13.89/11.67) (8.33/6.11) (2.78/0.56) (-2.78/-5) 10.56) (-17/-19) (-27/-28) IDU(DB) 55(12.78) 18.9 17.8 15.8 14.3 13.0 11.6 10.3 65(18.33) 20.3 18.8 16.6 15.9 14.6 12.8 11.9 75(23.89) 21.1 19.7 17.3 16.4 15.6 13.4...
  • Page 152 Cooling chart(R32): ODU(DB) °F(°C) 0(-17) 5(-15) 95 (35) (-9.44) (7.22) (23.89) (29.44) (40.56) (46.11) (48.89) IDU(DB/WB) 70/59 (21.11/15) 10.3 10.8 75/63 (23.89/17.22) 10.9 11.4 80/67 (26.67/19.44) 11.4 12.1 90/73 (32.22/22.78) 10.7 10.5 10.2 10.8 12.6 13.3 70/59 (21.11/15) 75/63 (23.89/17.22) 80/67 (26.67/19.44) 90/73 (32.22/22.78) 70/59 (21.11/15)
  • Page 153 Heating chart(R32): ODU(DB/WB) 57/53 47/43 37/33 27/23 17/13 (-8.33/- 0/-2 -17/-18 °F(°C) (13.89/11.67) (8.33/6.11) (2.78/0.56) (-2.78/-5) 10.56) (-17/-19) (-27/-28) IDU(DB) 55(12.78) 30.9 29.1 25.8 23.3 21.2 18.9 16.8 65(18.33) 33.2 30.6 27.1 25.9 23.8 20.9 19.4 75(23.89) 34.5 32.1 28.4 26.8 25.4 21.9...
  • Page 154 System Pressure Table-R22 Pressure Temperature Pressure Temperature °C °F °C °F 14.5 -41.091 -41.964 1600 41.748 107.146 21.75 -32.077 -25.739 1650 16.5 239.25 43.029 109.452 -25.177 -13.319 1700 246.5 44.281 111.706 36.25 -19.508 -3.114 1750 17.5 253.75 45.506 113.911 43.5 -14.654 5.623 1800...
  • Page 155 System Pressure Table-R410A Pressure Temperature Pressure Temperature °C °F °C °F 14.5 -51.623 -60.921 2350 23.5 340.75 38.817 101.871 21.75 -43.327 -45.989 2400 39.68 103.424 -36.992 -34.586 2450 24.5 355.25 40.531 104.956 36.25 -31.795 -25.231 2500 362.5 41.368 106.462 43.5 -27.351 -17.232 2550...
  • Page 156 System Pressure Table-R32 Pressure Temperature Pressure Temperature °C °F °C °F 14.5 -51.909 -61.436 1850 18.5 268.25 28.425 83.165 21.75 -43.635 -46.543 1900 275.5 29.447 85.005 -37.323 -35.181 1950 19.5 282.75 30.448 86.806 36.25 -32.15 -25.87 2000 31.431 88.576 43.5 -27.731 -17.916 2050...

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