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General| Brand | Mitsubishi Electric |
|---|---|
| Model | Mr.Slim MSZ12UN |
| Category | Air Conditioner |
| Language | English |
Lists the main sections and topics covered in the service manual.
Explains inverter technology for precise temperature control and consistent airflow.
Details how compressor rotation matches load for maximum efficiency.
Highlights improved SEER and HSPF values due to inverter technology.
Describes the LCD remote controller and its "I Feel Control" function.
Explains auto-restart and the benefits of the twin-rotary compressor.
Identifies parts of the indoor unit, including filters, vanes, and controls.
Identifies parts of the outdoor unit, including air inlet, outlet, and service panel.
Lists installation accessories like plates, screws, and batteries.
Details the buttons and functions of the wireless remote controller.
Provides detailed specs for indoor/outdoor units, including dimensions and sound.
Specifies pipe sizes, lengths, and refrigerant charge requirements.
Details the test conditions for SEER and HSPF ratings.
Specifies maximum allowed refrigerant piping lengths and height differences.
Provides cooling capacity data and correction factors for piping length.
Provides heating capacity data based on various temperature conditions.
Shows cooling capacity and power consumption vs. outdoor temperature.
Shows heating capacity and power consumption vs. outdoor temperature.
Displays cooling capacity and power consumption vs. outdoor temperature.
Displays heating capacity and power consumption vs. outdoor temperature.
Charts showing condensing and suction pressure for cooling mode.
Charts showing condensing and suction pressure for heating mode.
Shows condensing and suction pressure charts for cooling mode.
Shows condensing and suction pressure charts for heating mode.
Provides data on electrical input, current, pressures, and temperatures.
Details unit operating parameters and power supply connections.
Specifies voltage ranges and operating temperature/humidity limits.
Details airflow speed and room coverage range for different modes.
Information on adding refrigerant for longer pipe runs.
Lists guaranteed voltage, airflow, and defines key operational readings.
Provides instructions on measuring indoor/outdoor air wet-bulb and dry-bulb temperatures.
Shows how cooling capacity adjusts with operational frequency.
Shows how total input adjusts with operational frequency.
Illustrates heating capacity adjustments based on operational frequency.
Illustrates total input adjustments based on operational frequency.
Provides detailed physical dimensions and installation clearances for the MSZ09UN.
Provides detailed physical dimensions and installation clearances for the MSZ12UN.
Shows physical dimensions for the MUZ09UN/MUZ12UN outdoor units.
Specifies minimum clearances around the outdoor unit for proper ventilation.
Illustrates the electrical connections and components for the MSZ09UN indoor unit.
Illustrates the electrical connections and components for the MSZ12UN indoor unit.
Details the electrical connections and components for the outdoor units.
Illustrates the path of refrigerant for the MSZ09UN/MUZ09UN model.
Illustrates the path of refrigerant for the MSZ12UN/MUZ12UN model.
Explains the remote controller interface and indoor unit operation indicators.
Explains how modes are selected based on temperature and prior settings.
Explains temperature adjustment buttons and fuzzy control logic.
Describes fan speed adjustments and frost prevention in Cool mode.
Describes compressor, fan control, and frost prevention in DRY mode.
Explains compressor, fan, and frost prevention in HEAT mode.
Details fan speed adjustments in HEAT mode based on temperature differences.
Explains fan behavior to prevent cold air during heating.
Describes controls for warm air distribution and airflow.
Details protection mechanisms and defrosting conditions.
Illustrates the timing sequence during defrosting in heat mode.
Explains the function and control of the reversing valve coil.
Describes how the outdoor fan motor operates with the compressor.
Details the basic procedures for operating in Cool, Dry, and Heat modes.
Explains feedback control for the MSZ09UN fan motor and lock-up protection.
Describes how the vane angle is automatically adjusted for optimal air distribution.
Details swing mode functionality and cold air prevention in heat operation.
Explains how to set, cancel, and use ON/OFF timers.
Describes how to perform emergency and test run operations.
Shows the basic power supply circuit diagram and rush current prevention.
Explains the IPM, power factor improvement, and noise filtering circuits.
Details key components like reactors, capacitors, and diodes with their functions.
Details frequency settings based on room temperature and set temperature differences.
Describes how frequency is adjusted to protect against high discharge temperatures.
Explains how optimal voltage is determined for motor efficiency.
Details LEV control ranges, actuating speeds, and operating procedures.
Shows time charts and reference values for LEV control based on operational frequency.
Describes defrost setting adjustment and timer short mode via jumpers.
Details PC board modification for individual unit operation with multiple controllers.
Explains how the auto restart function works and how to disable it.
Provides safety and handling precautions before starting troubleshooting.
Outlines the troubleshooting process and how to replace remote controller batteries.
Provides a step-by-step guide to diagnose problems based on unit behavior.
Maps specific indicator lamp flash counts to potential causes.
Correlates operation indicator lamp flashes with abnormal points and checkpoints.
Lists LED indications on the outdoor unit and their corresponding error causes.
Provides resistance values and procedures for checking thermistors and compressor windings.
Details resistance checks for indoor fan motors.
Outlines resistance checks for outdoor fan motor, vane motor, RV coil, and expansion valve.
Explains how to check for balanced voltage between compressor terminals.
Details resistance checks on the IPM terminals.
Provides steps for checking compressor windings and operation time.
Outlines steps to check indoor fan motor resistance, connections, and voltage.
Guides on troubleshooting remote controller communication and receiver board issues.
Provides procedures for inspecting and testing the indoor electronic control PC board.
Details how to check the resistance of outdoor thermistors.
Explains how to check the R.V. coil for defects and voltage.
Guides on checking outdoor fan motor voltage and connections.
Outlines steps to verify power supply voltage and connections.
Details how to test the current-limiting resistor and relay.
Explains how to check LEV operation, vibration, and coil resistance.
Provides steps to diagnose issues related to incorrect wiring or serial signal loss.
Illustrates test points and voltage references on the MSZ09UN indoor PC board.
Shows the relationship between temperature and resistance for thermistors.
Illustrates test points and voltage references on the MSZ12UN indoor PC board.
Shows the relationship between temperature and resistance for thermistors.
Shows the arrangement of components on the outdoor electronic control PC board.
Provides resistance curves for outdoor thermistors vs. temperature.
Illustrates the layout of the noise filter and relay PC boards.
Details relay control status for different modes and thermostat settings.
Explains the solid state relay assignments for indoor fan speeds.
Step-by-step guide to remove the front panel of the indoor unit.
Instructions for removing the electronic control and power monitor boards.
Procedures for removing the electrical box and the vane motor assembly.
Steps to remove the indoor fan motor and the heat exchanger.
Step-by-step guide to remove the front panel of the MSZ12UN indoor unit.
Procedures for removing control boards for the MSZ12UN indoor unit.
Procedures for removing key components from the MSZ12UN indoor unit.
Steps to remove the outdoor unit cabinet and inverter assembly.
Procedures for removing the noise filter, relay, and electronic control PC boards.
Instructions for removing the outdoor fan motor and propeller.
Steps for safely removing the compressor, including refrigerant recovery.
Lists structural components of the MSZ09UN indoor unit with part numbers.
Lists parts for accessories and the remote controller.
Lists electrical components and functional parts for the MSZ09UN indoor unit.
Lists parts related to the indoor unit's heat exchanger.
Lists structural components of the MSZ12UN indoor unit with part numbers.
Lists parts for accessories and the remote controller for MSZ12UN.
Lists electrical and functional parts for the MSZ12UN indoor unit.
Lists parts related to the MSZ12UN indoor unit's heat exchanger.
Lists structural and functional parts for the MUZ09UN/MUZ12UN outdoor units.
Lists electrical components for the MUZ09UN/MUZ12UN outdoor units.
Details available optional extension pipes for refrigerant connections.
Describes optional air cleaning and deodorizing filters, including maintenance.
Lists the optional drain socket set part number.
