To Next PageTo Next PageHow to fix a reoccurring trouble code on a Mitsubishi Electric Mr.Slim PLA-A24EA7 Air Conditioner?
Assess the problem and take appropriate corrective steps as outlined in the “10-4. SELF-DIAGNOSIS ACTION TABLE” for your Mitsubishi Electric Air Conditioner.
Why is the Mitsubishi Electric Air Conditioner trouble not reoccurring but logged?
This could be due to temporary issues like protection devices activating in the refrigerant circuit (including the compressor), loose wiring, or electrical noise. Consider these possibilities. Re-examine the situation, paying attention to the installation environment, refrigerant level, weather conditions when the problem occurred, and wiring. After servicing, clear the check code logs and restart the Mitsubishi Electric Air Conditioner. This indicates there are no electrical component, controller board, or remote controller abnormalities.
What to do if the Mitsubishi Electric Mr.Slim PLA-A24EA7 trouble is not reoccurring and not logged?
First, re-examine the unusual symptom. If the cause isn't clear, keep using the Mitsubishi Electric Air Conditioner for a while. This suggests that components like electrical parts, the controller board, and the remote controller are likely working correctly.
What to do if the Mitsubishi Electric Mr.Slim PLA-A24EA7 trouble is reoccurring but no check code is displayed?
Troubleshoot the issue and determine the cause of the problem by referring to “10-5. TROUBLESHOOTING BY INFERIOR PHENOMENA” for your Mitsubishi Electric Air Conditioner.
What to do if the Mitsubishi Electric Mr.Slim PLA-A24EA7 Air Conditioner trouble is reoccurring?
If the trouble with your Mitsubishi Electric Air Conditioner is reoccurring, you should judge what is wrong and take corrective action according to “9-3. SELF-DIAGNOSIS ACTION TABLE”. Also, conduct troubleshooting and ascertain the cause of the trouble according to “9-4. TROUBLESHOOTING BY INFERIOR PHENOMENA”.
What to do if the Mitsubishi Electric Mr.Slim PLA-A24EA7 Air Conditioner trouble is not reoccurring but is logged?
If the trouble with your Mitsubishi Electric Air Conditioner is not reoccurring but is logged, consider temporary defects such as the work of protection devices in the refrigerant circuit including compressor, poor connection of wiring, or noise. Re-check the symptom, and check the installation environment, refrigerant amount, weather when the trouble occurred, matters related to wiring, etc. Also, reset check code logs and restart the unit after finishing service. Note that there might be no abnormality in the electrical component, controller board, remote controller, etc.
What to do if the Mitsubishi Electric Air Conditioner trouble is not reoccurring and is not logged?
If the trouble with your Mitsubishi Electric Air Conditioner is not reoccurring and is not logged, re-check the abnormal symptom. Conduct troubleshooting and ascertain the cause of the trouble according to “9-4. TROUBLESHOOTING BY INFERIOR PHENOMENA”. If the cause is not ascertained, continue to operate the unit for the time being. Note that there is no abnormality concerning parts such as the electrical component, controller board, remote controller, etc.
General| Brand | Mitsubishi Electric |
|---|---|
| Model | Mr.Slim PLA-A24EA7 |
| Category | Air Conditioner |
| Language | English |
General safety rules for preparation and during repair service.
Precautions for using R410A refrigerant and related practices.
Instructions for refrigerant charge, service cautions, and essential tools.
Specifies pipe thickness, flare dimensions, and tool compatibility for R410A.
Highlights high heating capacity, wide heating range, and chargeless system.
Detailed electrical, mechanical, and refrigerant specifications of the unit.
Provides refrigerant charge data, compressor specs, and noise criterion curves.
Details operational data for cooling and heating modes under various conditions.
Diagrams showing required free space, service space, and foundation bolt locations.
Illustrates possible directions for piping and wiring connections and knock-out holes.
Details connection patterns and wiring specs for power supply from the outdoor unit.
Specifies cable types, sizes, and maximum lengths for connecting indoor and outdoor units.
Guidelines for proper M-NET wiring to prevent electromagnetic interference.
Instructions for setting M-NET addresses using rotary switches.
Instructions for setting refrigerant addresses using DIP switches.
Guidelines for setting M-NET and refrigerant addresses in multi-group systems.
Diagram illustrating the refrigerant flow in cooling and heating modes.
Step-by-step procedure for pumping down refrigerant before servicing or disposal.
Guide to diagnosing and resolving recurring and non-recurring unit issues.
Essential checks and preparation steps before performing a test run.
Procedure for performing test runs and auto vane checks with a wired remote.
How to view error details, history, and reset errors via the remote controller.
Procedure to start/stop test run and set modes using outdoor unit DIP switches.
Steps to initiate and perform self-diagnosis checks and reset error history.
Procedure to diagnose the remote controller's functionality and check results.
Steps for diagnosing malfunctions using the IR wireless remote controller.
Lists error patterns detected by indoor and other units, with corresponding symptoms.
Table detailing causes and actions for abnormalities detected upon power-up.
Details for specific error codes F5, EA, Eb, and EC.
Details for specific error codes U1 and U2, related to pressure and temperature.
Details for error codes U3, U4, U5, and U8 related to thermistors, power, and fan.
Details for error code U9, indicating power supply issues.
Details for error codes UF, UH, UL, and UP related to compressor and current issues.
Details for error codes E0, E1, E2, E3, E4, E5, and E6 related to communication.
Details for error codes E8, E9, EF, Ed, and P8 related to communication and temperature.
Details for error codes A7 and A8 related to communication and M-NET response.
Addresses common remote controller and unit operational issues and their solutions.
Troubleshooting insufficient cooling/heating and compressor start/stop delays.
Diagnostic flows for 'PLEASE WAIT' display on the remote controller.
Diagnostic flows for 'Nothing displayed' on the remote controller (Part 1).
Diagnostic flows for 'Nothing displayed' on the remote controller (Part 2).
Diagnostic flows for 'Nothing displayed' on the remote controller (Part 3).
Common customer inquiries regarding unit operation and remote controller status.
Addresses issues with insufficient cooling/heating, blower sounds, and airflow.
Addresses airflow direction issues and unintended unit start/stop operations.
Explains white mist, water drips, dim remote display, and signal reception issues.
Procedures and resistance values for checking thermistors, motors, coils, and valves.
Flowchart for diagnosing issues with the DC fan motor and controller board.
Charts showing thermistor resistance values at different temperatures.
Details on LEV operation, connection, output pulses, and valve position.
Instructions on how to attach and detach the coil of the linear expansion valve.
Covers enabling, cautions, procedures, and releasing emergency operation.
Specifies data values used for operation during emergency mode.
Diagrams indicating test points on the outdoor controller and power circuit boards.
Diagram and brief checks for the outdoor power circuit board.
Explains the functions and settings of DIP switches and connectors.
Details the function of connectors, specifically CN31 for emergency operation.
Covers low-level sound priority mode and energy reduction via demand control.
Explains LED indications and check codes for normal and abnormal conditions.
Details on compressor operating data and error postponement codes based on SW2 settings.
Details on error temperature readings and error history logs based on SW2 settings.
Details on unit configuration information and indoor temperature data based on SW2.
Details on outdoor temperature readings and U9 error codes based on SW2 settings.
Details on capacity save and operation frequency on error based on SW2 settings.
Details on error temperature readings (LEV, indoor, outdoor) based on SW2 settings.
Details on error superheat and subcool based on SW2 settings.
Details on controlling status of compressor operating frequency based on SW2.
How to access and use the smooth maintenance function to view operational data.
Guide for checking operation conditions using temperature graphs and notes.
How to set unit functions using the wired remote controller.
Steps to access the service menu, including password entry.
Procedures for setting functions on PAR-4xMAA and PAR-3xMAA models.
Steps for selecting functions using the IR wireless remote controller.
How to change the temperature display unit from Fahrenheit to Celsius using the IR remote.
Steps to monitor operational data, including thermistor temps and error history.
List of request codes for monitoring various operational parameters.
Details of request codes for operation state, indoor/outdoor control, and compressor frequency.
Details of request codes for fan control, actuator outputs, and U9 error content.
Details for request codes related to demand capacity, external inputs, and unit settings.
Displays settings for various outdoor unit switches (SW1-SW10).
Information on indoor unit model, capacity, and wireless pair settings.
Steps to remove the service and top panels of the unit.
Procedure for removing the fan motor and its components.
Steps to remove the electrical parts box and disconnect wiring.
Procedures for removing various thermistors from the unit.
Procedures for removing the 4-way valve coil and LEV coils.
Procedure for removing the 4-way valve and its associated components.
Steps to remove the linear expansion valve (LEV).
Procedure for removing the high pressure switch.
Procedure for removing the reactor (DCL).
Steps for removing the compressor and related parts.
Steps to remove the power receiver and its associated components.
