Summary of Contents for MrCool Outtasight DIY Series
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Due to updates and constantly improving performance, the information and instructions within this manual are subject to change without notice. Version Date: May 20, 2025 Please visit www.mrcool.com/documentation to ensure you have the latest version of this manual.
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5.5 Information Inquiry & Setting ..................51 5.6 Error Diagnosis Without Error Code ................56 5.7 Quick Maintenance by Error Code .................63 5.8 Troubleshooting by Error Code ..................65 5.9 Check Procedures ......................85 TEMPERATURE SENSOR RESISTANCE TABLE ..............92 SYSTEM PRESSURE TABLE....................94 mrcool.com...
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8. For units with a wireless network function, the USB device access, replacement, and maintenance operations must be carried out by professional staff. 9. Refer to details further in this manual regarding installing the unit to its support. mrcool.com...
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Call your local dealer, or MRCOOL® tech support at (270) 366-0457, for further assistance. 2. If the air conditioner is used together with burners or other heating devices, thoroughly ventilate the room in order to avoid an oxygen deficiency.
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3. Service, maintenance, and repair of this unit must be performed by a certified technician. 4. Product un-installation and recycling must be performed by a certified technician. 5. When checking the unit for leaks, maintain proper record-keeping of all checks. mrcool.com...
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22. Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or conducting any hot work. A degree of ventilation shall continue during the period that the work is carried out. The ventilation should safely disperse any released refrigerant and preferably expel it externally into the atmosphere. mrcool.com...
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The following procedure should be adhered to: • safely remove refrigerant following local and national regulations; • evacuate; • purge the circuit with inert gas; • evacuate; • continuously flush or purge with inert gas when using flame to open circuit; • open the circuit mrcool.com...
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Equipment shall be labeled stating that it has been decommissioned and emptied of refrigerant. The label should be dated and signed. For appliances containing flammable refrigerants, ensure that there are labels on the equipment stating the equipment contains flammable refrigerant. mrcool.com...
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This symbol shows that the operation manual should be read carefully. CAUTION This symbol shows that a service personnel should be handling this equipment with reference to the installation manual. CAUTION This symbol shows that information is available such as the operating manual or CAUTION installation manual. mrcool.com...
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Anvmin shall not be less than the following: • Height of Outlet/m Mc/kg Mmax/kg Anvmin/m 2.685 0.045 2.941 0.042 3.177 0.038 3.396 0.035 3.602 0.031 3.797 0.028 3.983 0.024 4.160 0.020 4.330 0.016 4.493 0.013 4.651 0.009 4.803 0.005 4.951 0.001 mrcool.com...
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SYSTEM OVERVIEW 2.1 Model Reference Indoor Unit Model Capacity (Btu/h) Power Supply DIYCASSETTE06HP-230D25-O DIYCASSETTE09HP-230D25-O 208/230V~, 60Hz, 1 Phase DIYCASSETTE12HP-230D25-O DIYCASSETTE18HP-230D25-O Cassette Apperance mrcool.com...
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SYSTEM OVERVIEW 2.2 Dimensional Drawing mrcool.com...
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SYSTEM OVERVIEW 2.3 Part Names mrcool.com...
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SYSTEM OVERVIEW 2.4 Placement Diagram Perspective A Perspective B mrcool.com...
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Cable Ties Drainpipe Adapter Screw Kits (ST8*550, M4*22, ST2.9*16, (8,8,2,2,3) ST4.8*12, ST3.9*10) Water Receiver Rubber Ring Insulation Sleeve Smart Kit Panel MC Cable Sound Deadening Pad Note: The panel installation should be performed after wiring and piping have been completed. mrcool.com...
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SYSTEM OVERVIEW 2.6 Air Velocity and Temperature Distributions DIYCASSETTE06HP-230D-O: Cooling (Indoor: 80.6°F /27°C Outdoor: 95°F /35°C) Discharge angle 50° Airflow Velocity Distributions Temperature Distributions mrcool.com...
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SYSTEM OVERVIEW DIYCASSETTE12HP-230D-O: Cooling (Discharge angle 45°) Airflow Velocity Distributions Temperature Distributions mrcool.com...
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SYSTEM OVERVIEW DIYCASSETTE12HP-230D-O: Heating (Discharge angle 65°) Airflow Velocity Distributions Temperature Distributions mrcool.com...
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SYSTEM OVERVIEW DIYCASSETTE18HP-230D-O: Cooling (Discharge angle 45°) Airflow Velocity Distributions Temperature Distributions mrcool.com...
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SYSTEM OVERVIEW DIYCASSETTE18HP-230D-O: Heating (Discharge angle 65°) Airflow Velocity Distributions Temperature Distributions mrcool.com...
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Reference acoustic pressure OdB=20µPa • Sound level will vary depending on a range of factors such as the construction (acoustic absorption coefficient) of the room in which the equipment is installed. • The operating conditions are assumed to be standard. mrcool.com...
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Electrical Wiring Diagrams: Capacity (Btu/h) IDU Wiring Diagram 16022500006143 Abbreviation Paraphrase Yellow-Green Conductor CAP1 Indoor Fan Capacitor FAN1 Indoor Fan PUMP PUMP To CCM Comm.Bus Central Controller Indoor Room Temperature Coil Temperature of Indoor Heat Exchanger Super High Speed High Speed mrcool.com...
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SYSTEM OVERVIEW Indoor Unit Wiring Diagram: 16022500006143 mrcool.com...
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5. When the remote switch is on you can use the remote controller to select the mode desired; when the remote switch is off the unit will not respond to any demand from the remote. 6. The voltage of the port is 12VDC with a design max current of 5mA. mrcool.com...
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2. Although the design voltage can support higher voltage it is highly advised to have the incoming power less than 24V with a current draw of less than 0.5A. 3. When the unit occurs a problem the relay will close then the ALARM will activate. mrcool.com...
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3. The new motor cannot exceed 200W or 1A. 4. The new motor will work when a call is made for the indoor fan to operate. 5. When the unit goes into forced cooling mode or capacity testing mode the new motor will not work. mrcool.com...
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Note: SW2 dip switch is only reserved as a physical part but without mode modification function, if changes are needed to the factory setting use the remote control. Breezeless SW2-2 Mode (Factory Setting) Micro-switch SW2-2 is for selection of breezeless function. Range: OFF, ON. mrcool.com...
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If the height of installation is lower, a smaller value can be chosen. Range: 6°C, 4°C, 2°C, E Function (reserved for special customizing). For Header/Follower Setting Mode Header No Follower (Factory Setting) Header Header Follower Micro-switch SW8 is for setting Main or Slave (for some models). Range: No Slave, Main & Slave. mrcool.com...
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Usually there is glue on the switch as the switch position cannot be changed at random unless you use the PCB as a spare part on another unit. If using on a different unit you will have to select the proper position to match the size of the system. mrcool.com...
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• An oil trap should be installed every 20ft (6m) of vertical suction line riser (<36000 btu/h). • An oil trap should be installed every 32.8ft (10m) of vertical suction line riser (≥36000 Btu/h). mrcool.com...
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The special vacuum drying method shall be adopted when: 5. Finding moisture during flushing refrigerant pipe. 6. Conducting construction on a rainy day (Rain water might get into pipeline). 7. Construction period is long (Rain water might get into pipeline). mrcool.com...
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(If the gas and liquid pipe • Do not let wires touch or rest against the were insulated together it will decrease the refrigerant tubing, the compressor, or any performance of the system). moving parts. mrcool.com...
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• Ensure the manual buttons on the indoor unit work properly. • Check to see that the drainage system is clear and draining smoothly. • Ensure there is no vibration or abnormal noise during operation. mrcool.com...
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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...
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Preheating is automatically activated when T4 sensor is lower than setting temperature. 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...
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• If the following conditions are satisfied, the (1.5°C), fan speed increases to 80%. compressor ceases operation. • When T1-Tsc is higher than or equal to 7.2°F • Calculated frequency(fb) is less than (4°C), fan speed increases to 100%. minimum limit frequency(FminC). mrcool.com...
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• The indoor fan is controlled by the indoor temperature T1 and indoor unit coil temperature T2. • Off: Compressor stops. • Decrease: Decreases the running frequency to lower level per 1 minute. • Hold: Keep the current frequency. • Resume: No limitation for frequency. ΔTE1=0 mrcool.com...
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TIMING_DEFROST_TIME, if any one of the to the lower level per 20 seconds. following conditions is satisfied, defrosting • Hold: Keep the current frequency. ends and the machine switches to normal • Resume: No limitation for frequency. heating mode: mrcool.com...
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(fixed at rated frequency), and the indoor • The timer setting is available in this mode. fan runs at rated speed. After running for 30 minutes, the unit will switch to auto mode with a preset temperature of 76°F (24°C). mrcool.com...
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• When the unit receives signals such as switch off, turbo, silence, self clean, forced cooling, mode change, sleep mode, or adjusting the set temperature to less than 76°F (24°C), it will cease ECO operation. mrcool.com...
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After maintenance is completed, insert the female end back into the port. Note: This picture is for reference only. Actual appearance may vary. LED Flash Frequency: mrcool.com...
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Test the unit using the remote control. If the unit a code undefined by the service manual. Ensure does not respond to the remote, the indoor PCB that this code is not a temperature reading. requires replacement. If the unit responds, the display board requires replacement. mrcool.com...
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4. In order to exit from the engineering mode, press the "Power" + "Fan" buttons together for 2s to quit checking and return back to the home screen 5. The engineering mode will be exited if there is no valid input data for 60s. mrcool.com...
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System lacks refrigerant EH 0E Water-level alarm malfunction EH 0F Intelligent eye malfunction FH 07 Communication malfunction between indoor unit and auto-lifting panel PC 00 ODU IPM module protection PC 10 Over low voltage protection PC 11 Over voltage protection mrcool.com...
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Frequency limit caused by TP LC 05 Frequency limit caused by voltage LC 30 Frequency limit caused by high pressure LH 07 Frequency limit caused by remote controller IDUs mode conflict (match with multi outdoor unit) No malfunction and protection mrcool.com...
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5. In order to exit from the engineering mode please follow these steps. • Press the "Power" button for 2s until the remote controller screen shows "0". • The press the "Power" + "Fan" buttons together for 2s to quit the engineering mode and back to the home screen. mrcool.com...
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Capacity setting (kW) 23,26,32,35,51,72,120,-- (cancel) Max. frequency selection in cooling 40,41,42,..,83,83,-- (cancel) mode Max. frequency selection in heating 40,41,42,...,83,84,-- (cancel) mode Cooling temperature -3.0,-2.5,-2.0,...,3.0,3.5,-- (cancel) compensation Heating temperature -6.5,-6.0,-5.5,...,0.5,1.0,1.5,...,7.0,7.5,-- (cancel) compensation Max. fan speed -41,-40,-39,...,19,20,-- (cancel) selection in cooling mrcool.com...
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Compressor short-cycles due to overload TS16-TS17 High suction pressure TS16-TS17 Low discharge pressure TS16-TS17 High suction pressure TS16-TS17 Low suction pressure TS16-TS17 Unit runs continuously but insufficient cooling TS16-TS17 Too cool TS16-TS17 Compressor is noisy TS16-TS17 Horizontal louver cannot revolve TS16-TS17 mrcool.com...
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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...
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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...
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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...
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√ √ √ √ √ √ √ √ √ √ √ 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...
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Air handler fan will √ √ √ √ 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...
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TROUBLESHOOTING 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...
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Note: These pictures are for reference, actual appearance may vary. Troubleshooting and repair of the compressor driven chip EEPROM parameter error and communication error between the outdoor main chip and compressor driven chip are the same as EC 51. mrcool.com...
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TROUBLESHOOTING EL 01: IDU & ODU Communication Error Diagnosis and Solution. Description: Indoor unit cannot communicate with the outdoor unit. Recommended parts to prepare: • Indoor PCB • Outdoor PCB • Reactor Troubleshooting and repair: mrcool.com...
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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...
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Description: When the indoor/outdoor fan speed keeps too low or too high for a certain time, the unit ceases operation and the LED displays a fault. Recommended parts to prepare: • Connection wires • Fan assembly • Fan motor • PCB Troubleshooting and repair: mrcool.com...
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Release the UVW connector and measure the resistance of U-V, U-W, V-W. If the resistance is not equal to each other the fan motor has a problem and needs to be replaced. Otherwise the PCB has a problem and needs to be replaced. mrcool.com...
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Description: If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED displays a fault code. Recommended parts to prepare: • Connection wires • Sensors • PCB Troubleshooting and repair: Note: The picture and the value are for reference only, actual condition and specific values may vary. mrcool.com...
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Description: Judging the abnormality of the refrigeration system according to the number of compressor stops and the changes in operating parameters caused by excessive exhaust temperature. Recommended parts to prepare: • Indoor PCB • Additional refrigerant Troubleshooting and repair: mrcool.com...
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EH 0E: Water-Level Alarm Malfunction Diagnosis and Solution. Description: If the sampling voltage is not 5V, the LED displays a fault code. Recommended parts to prepare: • Connection wires • Water-level switch • Water pump • Indoor PCB Troubleshooting and repair: mrcool.com...
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Description: When the voltage signal the IPM sends to the compressor drive chip is abnormal, the LED displays a fault code. Recommended parts to prepare: • Connection wires • IPM module board • Outdoor fan assembly • Compressor • Outdoor PCB Troubleshooting and repair: mrcool.com...
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PC 01: 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 • PCB • Reactor Troubleshooting and repair: mrcool.com...
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Description: An abnormal inverter compressor drive is detected by a special detection circuit, including communication, signal detection, voltage detection, compressor rotation speed signal detection, and so on. Recommended parts to prepare: • Connection wires • IPM module board • Outdoor fan assembly • Compressor • Outdoor PCB Troubleshooting and repair: mrcool.com...
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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 • Pressure switch • Outdoor fan • Outdoor main PCB • Refrigerant Troubleshooting and repair: mrcool.com...
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TROUBLESHOOTING PC 03: Cont. mrcool.com...
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If the temperature of the IPM module is higher than a certain value, the LED will display a fault code. Recommended parts to prepare: • Connection wires • Outdoor PCB • IPM module board • High pressure protector • System blockages Troubleshooting and repair: mrcool.com...
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EH b3: Communication malfunction Between Wire and Master Control Diagnosis and Solution. Description: If the indoor PCB does not receive feedback from the wired controller, the error displays on the wired controller.. Recommended parts to prepare: • Connection wires • Indoor PCB • Wired Controller Troubleshooting and repair: mrcool.com...
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Description: The indoor unit does not receive the feedback from the external fan module during 150s or the indoor unit receives abnormal increases or decreases in voltage from the external fan module. Recommended parts to prepare: • Indoor main PCB Troubleshooting and repair: mrcool.com...
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FH 07: Communication Malfunction Between the Indoor Unit and Auto-Lifting Panel Diagnosis and Solution. Description: Indoor PCB does not get the feedback from the PCB of the auto-lifting panel. Recommended parts to prepare: • Connection wires • PCB of auto-lifting panel • Indoor PCB Troubleshooting and repair: mrcool.com...
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Description: 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 man PCB Troubleshooting and repair: mrcool.com...
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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...
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EH 12: Main Unit or Secondary Unit Malfunction (for Twin System) Diagnosis and Solution. Description: When set in twin systems, one indoor unit displays this error code which means another unit if faulty. Check another indoor unit's error code and then follow the prescribed solutions to resolve the malfunction. mrcool.com...
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Note: The picture and the value are for reference only, actual condition and specific values may vary. Compressor Check: 1. Disconnect the compressor power cord 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. mrcool.com...
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2.14±%Ω 2.56±%Ω 1.97±%Ω 2.35±%Ω 1.91±%Ω Blue-Black (at 68°F (20°C)) (at 68°F (20°C)) (at 68°F (20°C)) (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...
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∞ ∞ (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...
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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...
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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...
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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...
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Series Outtasight ® ® Ceiling Cassette 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.
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