MrCool DIY HP-WMAH-230D25-O Series Service Manual
  1. Manuals
  2. Brands
  3. MrCool Manuals
  4. Air Conditioner
  5. DIY HP-WMAH-230D25-O Series
  6. Service manual
MrCool DIY HP-WMAH-230D25-O Series Service Manual

MrCool DIY HP-WMAH-230D25-O Series Service Manual

Single-zone mini-split system
Hide thumbs Also See for DIY HP-WMAH-230D25-O Series:
Table of Contents

Advertisement

Quick Links

Download this manual
Mini-Split System
MODELS:
DIY-*-HP-WMAH-115D25-O
DIY-*-HP-WMAH-230D25-O
DIY-*-HP-C-115D25-O
DIY-*-HP-C-230D25-O
Read this manual carefully before installation and keep it where
the operator can easily find it for future reference.
Due to updates and constantly improving performance, the
information and instructions within this manual are subject to
change without notice.
Version Date: March 10, 2025
Please visit www.mrcool.com/documentation
to ensure you have the latest version of this manual.
This product utilizes R-454B refrigerant
DIY
Series
®
Single-Zone
SERVICE MANUAL

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the DIY HP-WMAH-230D25-O Series and is the answer not in the manual?

Questions and answers

Related Manuals for MrCool DIY HP-WMAH-230D25-O Series

Summary of Contents for MrCool DIY HP-WMAH-230D25-O Series

  • Page 1 Due to updates and constantly improving performance, the information and instructions within this manual are subject to change without notice. Version Date: March 10, 2025 Please visit www.mrcool.com/documentation to ensure you have the latest version of this manual.

  • Page 2: Table Of Contents

    4.7 Troubleshooting by Error Code ............... 54 4.8 Check Procedures ....................83 Temperature Sensor Resistance Table ............... 90 5.1 Temperature Sensor Resistance Value Table for TP (°C-K) ......90 System Pressure Table ....................92 6.1 System Pressure Table-R545B................92 mrcool.com...

  • Page 3: System Overview

    Oil traps in the rising gas pipe can prevent this. • An oil trap should be installed every 20ft (6m) of vertical suction line (< 36000Btu/h unit). • An oil trap should be installed every 32.8ft (10m) of vertical suction line (≥36000Btu/h unit). mrcool.com...

  • Page 4: Air Velocity And Temperature Distributions

    SYSTEM OVERVIEW 1.3 Air Velocity and Temperature Distributions DIY-09-HP-WMAH-115D25-O: Cooling (Indoor: 80.6°F/27°C Outdoor: 95°F/35°C) Discharge angle 58° Airflow Velocity Distributions Temperature Distributions mrcool.com...
  • Page 5 SYSTEM OVERVIEW DIY-09-HP-WMAH-115D25-O: Heating (Indoor: 68°F/20°C Outdoor: 44.6°F/7°C) Discharge angle 90° Airflow Velocity Distributions Temperature Distributions mrcool.com...
  • Page 6 SYSTEM OVERVIEW DIY-12-HP-WMAH-115D25-O: Cooling (Indoor: 80.6°F/27°C Outdoor: 95°F/35°C) Discharge angle 58° Airflow Velocity Distributions Temperature Distributions mrcool.com...
  • Page 7 SYSTEM OVERVIEW DIY-12-HP-WMAH-115D25-O: Heating (Indoor: 68°F/20°C Outdoor: 44.6°F/7°C) Discharge angle 90° Airflow Velocity Distributions Temperature Distributions mrcool.com...
  • Page 8 SYSTEM OVERVIEW DIY-18-HP-WMAH-230D25-O: Cooling (Indoor: 80.6°F/27°C Outdoor: 95°F/35°C) Discharge angle 50° Airflow Velocity Distributions Temperature Distributions mrcool.com...
  • Page 9 SYSTEM OVERVIEW DIY-18-HP-WMAH-230D25-O: Heating (Indoor: 68°F/20°C Outdoor: 44.6°F/7°C) Discharge angle 84° Airflow Velocity Distributions Temperature Distributions mrcool.com...
  • Page 10 SYSTEM OVERVIEW DIY-24-HP-WMAH-230D25-O: Cooling (Indoor: 80.6°F/27°C Outdoor: 95°F/35°C) Discharge angle 50° Airflow Velocity Distributions Temperature Distributions mrcool.com...
  • Page 11 SYSTEM OVERVIEW DIY-24-HP-WMAH-230D25-O: Heating (Indoor: 68°F/20°C Outdoor: 44.6°F/7°C) Discharge angle 77° Airflow Velocity Distributions Temperature Distributions mrcool.com...
  • Page 12 SYSTEM OVERVIEW DIY-36-HP-WMAH-230D25-O: Cooling (Indoor: 80.6°F/27°C Outdoor: 95°F/35°C) Discharge angle 55° Airflow Velocity Distributions Temperature Distributions mrcool.com...
  • Page 13 SYSTEM OVERVIEW DIY-36-HP-WMAH-230D25-O: Heating (Indoor: 68°F/20°C Outdoor: 44.6°F/7°C) Discharge angle 75° Airflow Velocity Distributions Temperature Distributions mrcool.com...

  • Page 14: Refrigerant Cycle Diagrams

    SYSTEM OVERVIEW 1.4 Refrigerant Cycle Diagrams DIY-09-HP-WMAH-115D25-O & DIY-12-HP-WMAH-115D25-O DIY-09-HP-C-115D25-O & DIY-12-HP-C-115D25-O DIY-18-HP-WMAH-230D25-O & DIY-18-HP-C-230D25-O mrcool.com...
  • Page 15 SYSTEM OVERVIEW DIY-24-HP-WMAH-230D25-O & DIY-24-HP-C-230D25-O DIY-36-HP-WMAH-230D25-O & DIY-36-HP-C-230D25-O mrcool.com...

  • Page 16: Electrical Wiring Diagrams

    ODU Wiring Diagram DIY-09-HP-WMAH-115D25-O DIY-09-HP-C-115D25-O 16022000040956 DIY-12-HP-WMAH-115D25-O DIY-12-HP-C-115D25-O DIY-18-HP-WMAH-230D25-O 16022000041530 DIY-18-HP-C-230D25-O 16022000040313 DIY-24-HP-WMAH-230D25-O DIY-24-HP-C-230D25-O DIY-36-HP-WMAH-230D25-O DIY-36-HP-C-230D25-O 16022000040650 Outdoor unit printed circuit board diagram: Outdoor Unit ODU Model ODU Printed Circuit Board DIY-09-HP-C-115D25-O 17122000062141 DIY-12-HP-C-115D25-O DIY-18-HP-C-230D25-O 17122000048066 DIY-24-HP-C-230D25-O 17122000048064 DIY-36-HP-C-230D25-O 17122300007152 mrcool.com...
  • Page 17 SYSTEM OVERVIEW Indoor unit wiring diagram: 16022000041530 mrcool.com...
  • Page 18 SYSTEM OVERVIEW Outdoor unit wiring diagram: 16022000040956 mrcool.com...
  • Page 19 SYSTEM OVERVIEW Outdoor unit wiring diagram: 16022000040311 mrcool.com...
  • Page 20 SYSTEM OVERVIEW Outdoor unit wiring diagram: 16022000040313 mrcool.com...
  • Page 21 SYSTEM OVERVIEW Outdoor unit wiring diagram: 16022000040650 mrcool.com...
  • Page 22 SYSTEM OVERVIEW Outdoor unit printed circuit board diagram: 17122000062141 mrcool.com...
  • Page 23 L_in: connect to L-line (115VAC input) CN1A N_in: connect to N-line (115VAC input) Earth Connect to compressor .0VAC (standby), 0-310VAC CN50 (running) CN4_2 REACTOR Connect to reactor, 115VAC when is ON CN4_3 Note: This section is for reference only. Please take practicality as standard. mrcool.com...
  • Page 24 SYSTEM OVERVIEW Outdoor unit printed circuit board diagram: 17122000057661 mrcool.com...
  • Page 25 L_in: connect to L-line (230VAC input) CN1A N_in: connect to N-line (230VAC input) Earth CN50 Connect to compressor (Output: 0-310VAC) CN4_2 REACTOR Connect to reactor, 115VAC when is ON CN4_3 Note: This section is for reference only. Please take practicality as standard. mrcool.com...
  • Page 26 SYSTEM OVERVIEW Outdoor unit printed circuit board diagram: 17122000048064 & 17122000048066 mrcool.com...
  • Page 27 Connect to electric expansion valve (Output: 0-12VDC) EEVF EEV1 CN53 EEV2 CN44 EEV3 H_YL CN49 Connect to high pressure sensor DC-FAN2 CN10 Connect to DC fan (Output: 0-310VAC) Note: This section is for reference only. Please take practicality as standard. mrcool.com...

  • Page 28: Product Features

    Sensor Redundancy and Automatic Shutoff: • If one temperature sensor malfunctions, the air conditioner continues operation and displays the corresponding error code, allowing for emergency use. • When more than one temperature sensor is malfunctioning, the air conditioner ceases operation. mrcool.com...

  • Page 29: Basic Functions

    The indoor fan speed can be set to 1%-100%, or auto. • The louver operations are identical to those in cooling mode. • Auto fan: In fan-only mode, AC operates the same as auto fan in cooling mode with the temperature set at 75°F (24°C).(Tsc=75°F (24°C)). mrcool.com...

  • Page 30: Indoor Fan Control

    For AC fan motor units: a configured value, the compressor ceases operation. Evaporator Temperature Protection: • Off: Compressor stops. • Decrease: Decreases the running frequency to lower level per 1 minute. • Hold: Keep the current frequency. • Resume: No limitation for frequency. mrcool.com...
  • Page 31 T1 and indoor unit coil temperature T2. Outdoor Fan Control: • The outdoor unit will be run at different fan speeds according to T4 and compressor running frequency. • For different outdoor units, the fan speeds are different. mrcool.com...

  • Page 32: Defrosting Mode

    • In auto mode, the machine selects cooling, • Condition 1-5, if any one of the following heating, auto-drying, or fan-only mode on conditions is satisfied, defrosting ends and the the basis of T1, Ts, T4 and relative humidity. machine switches to normal heating mode. mrcool.com...

  • Page 33: Drying Mode

    If the unit was already receives the following signals: off before the power failure, the unit will be in • Switch on standby mode. • Switch off • Timer on • Timer off • Sleep mode mrcool.com...

  • Page 34: Sleep Function

    FP Mode 46.4°F (8°) Heating: In heating mode, the temperature can be set to as low as 46.4°F (8°C) preventing the indoor area from freezing if in a unoccupied space during cold weather. mrcool.com...

  • Page 35: Refrigerant Charge

    11. Use a torque wrench to tighten the caps to a scale and record the starting weight. torque spec of 13.28ft. lbs (18Nm). 7. Fully open the Handle Lo manifold valve, 12. Check for any leaks. 2-way and 3-way valves. mrcool.com...

  • Page 36: Troubleshooting

    After maintenance is completed, insert the female end back into the port. Note: This picture is for reference only. Actual appearance may vary. mrcool.com...

  • Page 37: Error Display (Indoor Unit)

    Test the unit using the remote control. If the unit does undefined by the service manual. Ensure that this not respond to the remote, the indoor PCB requires code is not a temperature reading. replacement. If the unit responds, the display board requires replacement. mrcool.com...

  • Page 38: Error Display

    EC 53 ODU Ambient Temperature Sensor (T4) Error TS05-ODU EC 54 Comp. Discharge Temperature Sensor (TP) Error TS05-ODU EC 50 Open or Short Circuit of Outdoor Unit Temperature Sensor (T3, T4, TP) TS05-ODU PC 0L Low Ambient Temperature Protection mrcool.com...

  • Page 39: Outdoor Unit Point Check Function

    Frequency limit caused by TP It means Bit1 Frequency limit caused by current frequency limit caused by T2, T3, and current Bit0 Frequency limit caused by voltage 0:off, 1:turbo, 2:high, 3:medium, 4:low, 5:breeze, 6:super breeze DC fan motor speed 7:other mrcool.com...
  • Page 40 "70". If the indoor unit is not connected, the digital display tube will show "--" Reason of stop Evaporator pipe temp. sensor T2B of 1# indoor unit S communication models display "--" Evaporator pipe temp. T2b of 2# indoor unit mrcool.com...
  • Page 41 T4 temperature control is powered on and power lost; and press "On/Off" for 2s to exit. When the remote control does not burn any parameters, the min. set temperature will not be memorized.(Set within 1 minute after power on) mrcool.com...
  • Page 42 Set temperature TT after mode selector of the remote control will recover to "Cooling and compensation heating", the min. temperature recovers to 16°C, and the max. Temperature recovers to 30°C; and press "On/Off" for 2s to exit.(for some models). mrcool.com...
  • Page 43 Press “On/Off” for 2s to enter the The Temperature of Stop Fan, the code displayed is “Ch”, press “OK” to send the The Temperature of Stop Fan code; press the Up/Down key to select 16,17,18...28 and press “OK” to confirm; press “On/Off” for 2s to exit. mrcool.com...
  • Page 44 EC 72 Outdoor external fan phase failure EC 74 Outdoor external fan current sampling bias fault EC 73 Zero speed failure of outdoor unit DC fan EC 07 ODU fan speed out of control EL OC System lacks refrigerant mrcool.com...
  • Page 45 Voltage freq. limited LC 03 Current freq. limited LC 06 IPM module temp. freq. limited LC 30 High pressure freq. limited LC 31 Low pressure freq. limited LH 07 Remote control frequency limitation in effect IDUs mode conflict (multi-zone) mrcool.com...

  • Page 46: Error Diagnosis Without Error Code

    Compressor short-cycles due to overload TS19-TS20 High suction pressure TS19-TS20 Low discharge pressure TS19-TS20 High suction pressure TS19-TS20 Low suction pressure TS19-TS20 Unit runs continuously but insufficient cooling TS19-TS20 Too cool TS19-TS20 Compressor is noisy TS19-TS20 Horizontal louver cannot revolve TS19-TS20 mrcool.com...
  • Page 47 Unit runs but shortly √ √ √ stops The unit startup and √ √ √ stops frequently Unit runs continuously but √ √ √ √ √ insufficient cooling/ heating Cool cannot change to heat Unit is noisy Test method/ remedy mrcool.com...
  • Page 48 Unit is on but the air is not cold/hot Unit runs but shortly stops The unit startup and √ stops frequently Unit runs continuously but √ √ √ insufficient cooling/ heating Cool cannot change to heat Unit is noisy √ √ Test method/ remedy mrcool.com...
  • Page 49 Unit runs but √ √ √ √ √ √ shortly stops Compressor short-cycles √ √ √ due to overload High discharge √ √ √ √ √ √ pressure Low discharge √ √ pressure Test method/ remedy mrcool.com...
  • Page 50 √ √ √ √ √ √ √ √ √ √ √ insufficient cooling Too Cool X X X Compressor is X X X √ √ √ √ √ noisy Horizontal louver X X X cannot revolve Test method/ remedy mrcool.com...
  • Page 51 √ √ √ √ not start Condenser fan will √ √ √ √ √ not start Unit runs but √ √ shortly stops Compressor short-cycles due to √ √ overload High discharge pressure Low discharge pressure Test method/ remedy mrcool.com...
  • Page 52 2. Field Electrical Circuit Maintenance Possible causes of trouble High suction pressure Low suction pressure Unit runs continuously but insufficient cooling Too cool √ √ Compressor is noisy Horizontal louver √ √ √ can not revolve Test method/ remedy mrcool.com...

  • Page 53: Quick Maintenance By Error Code

    √ √ √ √ Outdoor Fan Motor √ T3 Sensor √ T4 Sensor √ TP Sensor √ Reactor √ √ Compressor √ √ √ √ IPM Module Board √ High Pressure Protector √ Low Pressure Protector √ Additional Refrigerant mrcool.com...
  • Page 54 √ √ √ √ Outdoor PCB √ Outdoor Fan Motor T3 Sensor TP Sensor Pressure Sensor √ Reactor √ Compressor √ IPM Module Board High Pressure Valve Assembly √ High Pressure Protector √ Low Pressure Protector √ Additional Refrigerant mrcool.com...

  • Page 55: Troubleshooting By Error Code

    EEPROM: A read-only memory whose contents can be erased and reprogrammed using a puled voltage. The location of the EEPROM chip on the indoor PCB is shown in the following image: Note: These pictures are for reference, actual appearance may vary. mrcool.com...
  • Page 56 EEPROM: A read-only memory whose contents can be erased and reprogrammed using a puled voltage. The location of the EEPROM chip on the outdoor PCB is shown in the following image: Note: This picture is for reference only, actual appearance may vary. mrcool.com...
  • Page 57 TROUBLESHOOTING TS02-S-INV: IDU & ODU communication error diagnosis and solution Description: Indoor unit can not communicate with outdoor unit Recommended parts to prepare: • Indoor PCB • Outdoor PCB • Short-circuited component Troubleshooting and repair: mrcool.com...
  • Page 58 Use a multimeter to test the resistance of the reactor which does not connect with the capacitor. • The normal value should be around zero ohms. Otherwise the reactor has a malfunction. Note: The pictures and the values are for reference only, actual condition and specific values may vary. mrcool.com...
  • Page 59 Recommended parts to prepare: • Connection wires • Indoor main PCB Troubleshooting and repair: Note: Zero crossing detection error is only valid for the unit with AC fan motor, for other models, this error is invalid. mrcool.com...
  • Page 60 Description: When the indoor fan speed keeps too low or too high for a period of time the LED displays the failure code and the AC turns off. Recommended parts to prepare: • Connection wires • Fan assembly • Fan motor • Indoor main PCB Troubleshooting and repair: mrcool.com...
  • Page 61 Power on and set the unit running in fan mode at high fan speed. After running for 15 seconds, measure the voltage of pin1 and pin2. If the value of the voltage is less than 100V(208~240V power supply) or 50V (115V power supply) the PCB has problems and will need to be replaced. mrcool.com...
  • Page 62 Description: When the outdoor fan speed keeps too low or too high for a certain time, the LED displays the failure code and the system turns off. Recommended parts to prepare: • Connection wires • Fan assembly • Fan motor • Outdoor main PCB Troubleshooting and repair: mrcool.com...
  • Page 63 If the value of the voltage is not in the range showing in below table the PCB has a problem and needs to be replaced. Color Signal Voltage Vs/Vm 192V~380V Black White 13.5-16.5V Yellow 0~6.5V Blue 13.5-16.5V mrcool.com...
  • Page 64 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: • Connection wires • Sensors • Indoor main PCB Troubleshooting and repair: Note: The picture and the value are for reference only, actual appearance and values may vary. mrcool.com...
  • Page 65 • Outdoor main PCB Troubleshooting and repair: Note: For certain models the outdoor unit will use a combination sensor, T3, T4 and TP are the same sensor. This picture and value are for reference only, actual appearance and value may vary. mrcool.com...
  • Page 66 Description: Judging the abnormality of the refrigeration system according to the number of compressor as well as the changes in the operating parameters caused by excessive exhaust temperature. Recommended parts to prepare: • Indoor PCB • Additional refrigerant Troubleshooting and repair: mrcool.com...
  • Page 67 TROUBLESHOOTING TS07: Indoor PCB/Display board communication error diagnosis and solution Description: Indoor PCB does not receive feedback from the display board. Recommended parts to prepare: • Communication wire • Indoor PCB • Display board Troubleshooting and repair: mrcool.com...
  • Page 68 TS08-S: Current overload protection diagnosis and solution Description: An abnormal current rise is detected by checking the specified current detection circuit. Recommended parts to prepare: • Connection wires • Reactor • Outdoor fan • Outdoor PCB Troubleshooting and repair: mrcool.com...
  • Page 69 Description: The indoor unit receives a fault signal for 10s or the indoor unit does not receive feedback from the refrigerant sensor for 150s. Recommended parts to prepare: • Connection wires • Sensors • Indoor main PCB Troubleshooting and repair: mrcool.com...
  • Page 70 APP, and so on to eliminate the alarm) and any other non- refrigerant leakage fault the indoor unit will only display ECC1 and the buzzer will not make a sound. Recommended parts to prepare: • Additional refrigerant Troubleshooting and repair: mrcool.com...
  • Page 71 Description: When the voltage signal the IPM sends to the compressor drive chip is abnormal the LED displays a fault code and the system turns off. Recommended parts to prepare: • Connection wires • IPM module board • Outdoor fan assembly • Compressor • Outdoor PCB Troubleshooting and repair: mrcool.com...
  • Page 72 TS10-S: ODU voltage protection diagnosis and solution Description: Abnormal increases or decreases in voltage are detected by checking the specified voltage detection circuit. Recommended parts to prepare: • Power supply wires • IPM module board • PCM • Reactor Troubleshooting and repair: mrcool.com...
  • Page 73 Description: If the temperature of the IPM module is higher than a certain value the LED displays a fault code. Recommended parts to prepare: • Connection wires • Outdoor PCB • IPM module board • High pressure protector • System blockages Troubleshooting and repair: mrcool.com...
  • Page 74 Description: An abnormal inverter compressor drive is detected by a special detection circuit including communication signal detection, voltage detection, compressor rotation speed signal detection, ect. Recommended parts to prepare: • Connection wires • Outdoor PCB • IPM module board • Outdoor fan assembly • Compressor Troubleshooting and repair: mrcool.com...

  • Page 75: Troubleshooting And Repair

    638 PSI (4.4MPa)). Or the outdoor pressure switch cut off the system due to low pressure (if the pressure is lower than 18.85 PSI (0.13MPa) the LED will display a fault code. Recommended parts to prepare: • Connection wires • Outdoor PCB • Refrigerant • Pressure switch • Outdoor fan Troubleshooting and repair: mrcool.com...
  • Page 76 TROUBLESHOOTING TS26-INV Cont. mrcool.com...
  • Page 77 When the compressor is on and the outdoor ambient temperature (T4) is lower than -40°F (-40°C) for 10s the system will stop and display the fault code. When the outdoor ambient temperature (T4) is no lower than -25.6°F (-32°C) for 10s, the unit will exit protection. mrcool.com...
  • Page 78 It will start again only when the outdoor pipe temperature sensor is less than 125.6°F (52°C). Recommended parts to prepare: • Connection wires • Outdoor main PCB • Condenser temperature sensor • Refrigerant • Outdoor fan Troubleshooting and repair: mrcool.com...
  • Page 79 • PFC module Troubleshooting and repair: First test the resistance between every two ports of U,V,W of the IPM and P,N. If any result in reading 0 or close to 0 the IPM is defective, otherwise please follow the procedure below: mrcool.com...
  • Page 80 TS31: Communication error between the outdoor main chip and the compressor drive chip diagnosis and solution Description: The main PCB cannot detect the IPM board. Recommended parts to prepare: • Connection wires • Outdoor main PCB • IPM board • Electric control box Troubleshooting and repair: mrcool.com...
  • Page 81 • Additional refrigerant Troubleshooting and repair: Note: For certain models the outdoor unit will use a combination sensor, T3, T4 and TP are the same sensor. This picture and value are for reference only, actual appearance and value may vary. mrcool.com...
  • Page 82 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 display will show a fault code. Recommended parts to prepare: • Connection wires • Outdoor main PCB • Fan motor Troubleshooting and repair: mrcool.com...
  • Page 83 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 display will show a fault code. Recommended parts to prepare: • Connection wires • Outdoor main PCB • Compressor Troubleshooting and repair: mrcool.com...

  • Page 84: Check Procedures

    1. Disconnect the temperature sensor from the PCB. 2. Measure the resistance value of the sensor using a multi-meter. 3. Check corresponding temperature sensor resistance value table. Note: The picture and the value are for reference only, actual condition and specific values may vary. mrcool.com...

  • Page 85: Compressor Check

    KTN110D42UFZ KSN140D21UFZ KTM140D78UFZ3 Blue-Red 1.75±5%Ω 1.82±5%Ω 1.28±5%Ω 1.5±5%Ω Blue-Black (at 68°F (20°C)) (at 68°F (20°C)) (at 68°F (20°C)) (at 68°F (20°C)) Red-Black KTF235D22UMT Resistance Value ATF235D22TMT KTM240D46UKT2 KTF250D22UMT Blue-Red 0.75±5%Ω 1.04±5%Ω Blue-Black (at 68°F (20°C)) (at 68°F (20°C) Red-Black mrcool.com...
  • Page 86 (at 68°F (20°C)) (at 68°F (20°C) Red-Black Resistance Value KSK75D33UEZD3 DTN210D54UEZ3 Blue-Red 2.14±5%Ω 2.53±5%Ω Blue-Black (at 68°F (20°C)) (at 68°F (20°C) Red-Black Note: The picture and the value are for reference only, actual condition and specific values may vary. mrcool.com...

  • Page 87: Ipm Continuity Check

    ∞ ∞ (Several M±5%Ω) (Several M±5%Ω) Or test the conductivity of IPM with diode mode: Needle-type Tester Needle-Type Tester Normal Value Normal Value Black Black Open-Circuit 0.3-0.5V Needle-type Tester Needle-Type Tester Normal Value Normal Value Black Black 0.3-0.5V Open-Circuit mrcool.com...
  • Page 88 1. Power on and use a digital tester to measure the voltage. When the unit operates in cooling it is 0V, when the unit operates in heating it is about 230VAC. If the value of the voltage is not in range the PCB has problems and needs to be replaced. mrcool.com...
  • Page 89 TROUBLESHOOTING 2. Turn the power off and use a digital tester to measure the resistance. The value should be 1.8~2.5 K±5%Ω. mrcool.com...
  • Page 90 1. Disconnect the connector from the outdoor PCB. 2. Measure the resistance value of each winding using a multi-meter. 3. Check the resistance value of each winding in the following table. Color of Lead Winding Normal Value Red-Blue Red-Yellow About 50Ω Brown-Orange Brown-White mrcool.com...

  • Page 91: Temperature Sensor Resistance Table

    5.488 1.762 21.26 5.32 1.171 115.2 20.46 5.157 1.674 109.8 19.69 1.632 104.6 18.96 4.849 99.69 18.26 4.703 95.05 17.58 4.562 90.66 16.94 4.426 86.49 16.32 4.294 82.54 15.73 4.167 78.79 15.16 4.045 75.24 14.62 3.927 71.86 14.09 3.812 mrcool.com...
  • Page 92 3.45097 0.8795 0.2777 19.6891 3.31847 0.85248 0.27078 18.7177 3.19183 0.82643 0.26408 17.8005 3.07075 0.80132 0.25757 16.9341 2.95896 0.77709 0.25125 16.1156 2.84421 0.7537 0.24512 15.3418 2.73823 0.73119 0.23916 14.6181 2.63682 0.68844 0.23338 13.918 2.53973 0.66818 0.22776 13.2631 2.4467 0.64862 0.22231 mrcool.com...

  • Page 93: System Pressure Table

    372.84 114.8 350.54 3.51 50.84 -5.8 2632.1 26.32 381.74 116.6 364.08 3.64 52.80 2694.7 26.95 390.82 118.4 378.02 3.78 54.83 -2.2 2758.33 27.58 400.04 120.2 392.37 3.92 56.91 -0.4 2823.2 28.23 409.46 407.13 4.07 59.05 2889.3 28.89 419.04 123.8 mrcool.com...
  • Page 94 638.56 802.08 8.02 116.33 37.4 4498.7 44.99 652.46 159.8 827.47 8.27 120.01 39.2 4596.5 45.97 666.64 161.6 853.49 8.53 123.78 4696.5 46.97 681.15 163.4 880.11 8.80 127.64 42.8 4798.9 47.99 696.00 165.5 907.35 9.07 131.60 44.6 4904.1 49.04 711.25 mrcool.com...
  • Page 95 Series ® Single-Zone Mini-Split System The design and specifications of this product and/or manual are subject to change without prior notice. Consult with the sales agency or manufacturer for details.

This manual is also suitable for:

Diy hp-wmah-115d25-o seriesDiy seriesDiy hp-c-115d25-o seriesDiy hp-c-230d25-o seriesDiy-09-hp-wmah-115d25-oDiy-09-hp-c-115d25-o ... Show all

Table of Contents