To Next PageTo Next PageWhat to do if the Mitsubishi Electric Air Conditioner detects high pressure with the high-pressure switch (HPS) during operation?
If the high-pressure switch detects high pressure during operation, check the refrigerant circuit and the refrigerant amount. Also, check the stop valve.
What should I do if the fin temperature exceeds 90 ºC during operation of my Mitsubishi Electric MXZ-3D68VA Air Conditioner?
If the fin temperature exceeds 90 ºC during operation, check around the outdoor unit and the outdoor unit air passage.
What to do if the discharge temperature exceeds 116 ºC during operation of Mitsubishi Electric MXZ-3D68VA?
If the discharge temperature exceeds 116 ºC during operation, check the refrigerant circuit and the refrigerant amount.
What to do if the sensor circuit of current of compressor shorts or opens during compressor operate of Mitsubishi Electric Air Conditioner?
If the sensor circuit of current of compressor shorts or opens during compressor operation, replace the inverter P.C. board.
What to do if Mitsubishi Electric MXZ-3D68VA nonvolatile memory data cannot be read properly?
If the nonvolatile memory data cannot be read properly, replace the inverter P.C. board.
General| Brand | Mitsubishi Electric |
|---|---|
| Model | MXZ-3D68VA |
| Category | Air Conditioner |
| Language | English |
Details installation clearances for outdoor units to ensure proper operation and service access.
Specifies required service access space around outdoor units for maintenance and repairs.
Provides maximum allowable refrigerant piping lengths for each indoor unit and total system.
Details requirements for additional refrigerant charge based on piping length.
Specifies refrigerant piping length and charge for MFZ-KJ series indoor units.
Specifies the guaranteed voltage range for the air conditioner operation.
Indicates that air flow should be set to MAX for performance testing.
Lists key parameters to be recorded during performance testing.
Presents performance curves showing capacity and input based on indoor/outdoor temperatures.
Details capacity and input correction factors based on inverter output frequency.
Illustrates the location of switches on the outdoor unit's P.C. boards for service functions.
Explains how to lock the operation mode (COOL/DRY or HEAT) of the outdoor unit.
Describes the function to reduce outdoor unit operating noise, potentially affecting capacity.
Details the automatic detection and correction of improper wiring or piping.
Explains the pre-heat control function to improve compressor start-up conditions.
Describes the function to adjust the current flowing in the outdoor unit.
Provides essential precautions and checks before starting troubleshooting procedures.
Explains how the unit memorizes abnormal conditions and how to recall failure details.
Lists outdoor unit failure modes, LED indications, conditions, and remedies.
Provides a troubleshooting flow chart based on outdoor unit LED indicators.
Details troubleshooting symptoms, indications, conditions, and remedies for outdoor unit failures.
Lists failure modes, LED indications, conditions, and remedies for MXZ-3D/4D/5D series.
Specifies measurement criteria for checking main parts like thermistors, compressor, and motors.
Provides a troubleshooting flow chart for power supply issues and P.C. board checks.
Guides on checking for miswiring, poor contact, or serial signal errors affecting unit operation.
Provides a step-by-step procedure for checking the inverter and compressor for proper operation.
Details the procedure for checking the resistance of outdoor thermistors.
Describes how to check the Linear Expansion Valve (LEV) for proper operation.
Outlines the procedure for checking the outdoor fan motor for operational issues.
Troubleshooting steps for when the heating operation is not working.
Troubleshooting steps for when the cooling operation is not working.
Procedure for checking the High Pressure Switch (HPS) function.
Discusses other operational issues like units not operating or simultaneous heating/cooling.
Provides diagrams showing test points and voltage measurements on P.C. boards.
Diagram showing test points and voltage measurement locations on the inverter P.C. board.
Diagram illustrating test points and voltage measurements on the outdoor control P.C. board.
Diagram showing test points and connections on the outdoor power P.C. board.
Diagram showing test points and connectors on the outdoor display P.C. board.
Diagram illustrating the layout and connections of the noise filter P.C. board.
Provides step-by-step instructions and photos for removing external panels and covers.
Details the procedure for safely removing the inverter assembly and its P.C. board.
Instructions for removing the Reversing Valve (R.V.) coil component.
Explains how to remove temperature sensors from the outdoor unit.
Step-by-step guide for removing the outdoor fan motor.
Procedure for removing the compressor and the 4-way valve, including gas recovery.
Provides step-by-step instructions and photos for removing external panels and covers.
Details removing the main P.C. boards and noise filter from the outdoor unit.
Instructions for removing the reactor component from the outdoor unit.
Step-by-step guide for removing the outdoor fan motor.
Procedure for removing the expansion valve and associated pipes.
Provides step-by-step instructions and photos for removing external panels.
