To Next PageTo Next PageWhat to do if the trouble is reoccurring with my Mitsubishi Electric PUD-SHWM120VAA?
If the trouble with your Mitsubishi Electric Heat Pump is reoccurring, you should determine the issue and take corrective action according to the self-diagnosis action table. Additionally, conduct troubleshooting to ascertain the cause of the problem.
What to do if the trouble is not reoccurring on my Mitsubishi Electric PUD-SHWM120VAA Heat Pump?
If the trouble is not reoccurring with your Mitsubishi Electric Heat Pump, consider temporary defects such as the activation of protection devices in the refrigerant circuit (including the compressor), poor wiring connections, or noise. Re-check the symptom, and inspect the installation environment, refrigerant amount, and weather conditions when the trouble occurred, as well as anything related to wiring. If the cause is not ascertained, continue to operate the unit for the time being. Also, reset check code logs and restart the unit after finishing service. Moreover, re-check the abnormal symptom. Conduct troubleshooting to ascertain the cause of the trouble. Note that there might be no abnormality in electrical components, controller board, or remote controller.
General| Brand | Mitsubishi Electric |
|---|---|
| Model | PUD-SHWM120VAA |
| Category | Heat Pump |
| Language | English |
Details on air to water systems for reference.
Essential safety rules to follow before and during service.
Specific precautions for R32 refrigerant usage and handling.
General warnings and prohibitions for service operations.
Specific cautions to follow during service procedures.
Guidance on adding refrigerant, including best practices.
Detailed safety checks and procedures for R32 units.
Guidelines and precautions for reusing existing refrigerant pipes.
Recommendations for selecting a safe and proper installation site.
Specifies minimum installation space requirements for safety.
Table detailing refrigerant charge amounts for different models and pipe lengths.
Technical specifications for the compressor models used.
Table specifying wiring requirements for power supply and connections.
Procedure for safely collecting refrigerant before relocation or disposal.
Summary of check codes and actions for recurring/non-recurring troubles.
Table detailing abnormalities detected upon power-on and corresponding actions.
Troubleshooting guide for specific operational phenomena and issues.
Procedures for inspecting and checking various unit parts.
Procedures for checking specific components like sensors and motors.
Explanation of linear expansion valve operation and connection.
Diagrams showing test points on various circuit boards.
Diagram showing test points on the outdoor controller circuit board.
Diagram detailing test points on the outdoor power circuit board.
Details on functions of switches, connectors, and jumpers.
Explains the function and settings of various switches on the unit.
Information on special functions and on-site modifications.
Procedure for refrigerant collecting before unit removal or disposal.
Explains how to interpret LED indicators for troubleshooting.
Details LED patterns indicating specific abnormal conditions.
Interpreting blinking LED patterns when the compressor stops due to protection devices.
Details on values displayed via SW2 settings for various parameters.
Provides detailed history of U9 error codes.
Lists request codes and their corresponding data for monitoring.
Provides detailed explanations for various request codes.
Details the unit's operation states and relay outputs.
Explains the control states of the outdoor unit.
Details compressor frequency control states.
Explains the fan control states and correction values.
Lists detected error contents related to U9 code.
Steps for disassembling the unit.
Instructions for removing the service and top panels.
Steps to remove the fan motor.
Procedure for removing the electrical parts box.
Steps for disassembling the electrical parts box for V-type models.
Steps for disassembling the electrical parts box for Y-type models.
Steps for disassembling the electrical parts box for SHWM140V models.
Instructions for removing the 2-phase pipe thermistor.
Steps for removing the ambient thermistor.
Procedure for removing the liquid thermistor.
Steps to remove discharge, suction, and comp. surface thermistors.
Instructions for removing 4-way valve coil, LEV coil, and related wires.
Steps to remove the 4-way valve, LEV, pressure switch, and sensor.
Procedure for removing the compressor.
Steps for removing reactors for Y-type models.
