To Next PageTo Next PageWhat to do if Mitsubishi Electric PUY-A30NHA7 trouble is reoccurring?
If the trouble with your Mitsubishi Electric Air Conditioner is reoccurring, assess the problem and take corrective action as outlined in the “9-3. SELF-DIAGNOSIS ACTION TABLE”. Also, perform troubleshooting to identify the cause of the issue, referring to “9-4. TROUBLESHOOTING OF PROBLEMS”.
What to do if Mitsubishi Electric PUY-A30NHA7 trouble is not reoccurring and not logged?
If the trouble with your Mitsubishi Electric Air Conditioner is not reoccurring and not logged, re-check the abnormal symptom. If the cause isn't clear, continue operating the unit for the time being. Also, conduct troubleshooting and ascertain the cause of the trouble according to “9-4. TROUBLESHOOTING OF PROBLEMS”. There is no abnormality concerning of parts such as electrical component, controller board, remote controller, etc.
What to do if Mitsubishi Electric PUY-A30NHA7 Air Conditioner trouble is not reoccurring and logged?
If the trouble with your Mitsubishi Electric Air Conditioner is not reoccurring but is logged, consider temporary issues like protection device activity in the refrigerant circuit including compressor, loose wiring, or electrical noise. Re-check the symptom, and check the installation environment, refrigerant amount, weather when the trouble occurred, matters related to wiring, etc. After finishing service, reset the error code logs and restart the unit. There is no abnormality in electrical component, controller board, remote controller, etc.
General| Brand | Mitsubishi Electric |
|---|---|
| Model | PUY-A30NHA7 |
| Category | Air Conditioner |
| Language | English |
Guidelines for preparing tools, protectors, and ensuring adequate ventilation before service.
Instructions for safe practices during repair, including handling electrical parts and refrigerants.
List of essential tools required for working with R410A refrigerant.
Mandatory use of only the specified refrigerant to prevent hazards and equipment failure.
Details on specific flare cutting and flare nut dimensions for R410A.
Specific instructions for operating the unit in low ambient temperatures.
Table showing refrigerant charge amounts for various piping lengths and models.
Detailed operational data for heat pump mode, including temperatures and pressures.
Detailed operational data for cooling-only mode, including temperatures and pressures.
Procedure for collecting refrigerant before moving the unit.
Method for testing the airtightness of refrigerant pipes using pressure.
Steps to initiate and conclude the test run operation.
Guidance on actions based on whether a trouble is reoccurring or not, and check code status.
Essential checks to perform before starting a test run.
Procedure to view and delete error history records from the remote controller.
Step-by-step guide for performing self-diagnosis using the remote controller.
Procedure to reset error history during self-diagnosis, including confirmation.
Abnormalities related to the high-pressure switch (63H) operating during compressor operation.
Issues related to high discharge or compressor surface temperatures detected by thermistors.
Detection of open or short circuit in outdoor unit temperature thermistors TH4 and TH33.
Detection of open or short circuits in various outdoor unit thermistors.
Abnormalities detected when the heat sink thermistor (TH8) reads specific temperatures.
Abnormalities detected in the power module, particularly related to overcurrent.
Issues detected with the outdoor fan motor's rotational frequency during DC operation.
Detection of compressor overcurrent or locked state within 30 seconds of starting.
Error detected by the current sensor, indicating abnormal input current.
Conditions indicating low pressure, potentially due to refrigerant shortage or blockages.
Detection of compressor overcurrent after starting operation for 30 seconds.
Detailed error codes related to overvoltage, undervoltage, and current errors in the power circuit.
Errors related to the indoor room temperature thermistor (P1).
Errors related to indoor pipe temperature thermistors (P2, P9).
Errors related to the drain sensor or float switch connector (P4).
Errors related to indoor drain overflow protection (P5).
Errors related to freezing in cooling or overheating in heating protection (P6).
Errors related to pipe temperature abnormalities (P8).
Errors related to the indoor controller board itself (Fb).
Issues related to the indoor unit fan motor (Pb).
Errors related to the remote controller board (E1/E2).
Errors related to normal transmission or signal reception between remote controller and units.
Issues with reading non-volatile memory or clock function of the remote controller's control board.
Errors indicating abnormal transmission or reception of signals between remote controller and indoor unit.
Error when indoor controller board fails to receive signals from outdoor unit or other indoor units.
Error when indoor unit fails to transmit signals to the outdoor unit.
Error when outdoor controller board cannot receive signals normally from indoor unit or other units.
Error when outdoor unit fails to transmit signals to indoor unit or other units.
Errors indicating defective serial communication between outdoor controller and power boards or M-NET.
Issues with the refrigerant circuit, such as 4-way valve malfunction or blockages.
Steps to diagnose and fix issues where the remote controller display is blank or unresponsive.
Addressing reduced cooling performance despite normal display, often due to refrigerant or filter issues.
Addressing reduced heating performance despite normal display, often due to refrigerant or valve issues.
Addressing customer calls where the unit is completely unresponsive.
Addressing insufficient cooling or heating, often related to set temperature or airflow.
Diagnosing why the outdoor fan motor does not rotate, checking power supply and wiring.
Identifies check codes and conditions that enable emergency operation.
Important checks and warnings before and during emergency operation.
Step-by-step instructions to activate emergency operation mode.
Procedure to safely exit emergency operation mode and return to normal.
Diagrams showing test points on the outdoor controller circuit board for voltage and resistance checks.
Lists abnormal conditions indicated by LED patterns and check codes on the outdoor unit.
Details on errors U1-U8, UF, UH, UL, UP, P1, P2, P9, P4, P5, P6, P8, Fb, Pb, E1, E2.
Details on errors E0-E9, EF, Ed related to communication and M-NET.
Detailed steps for removing the compressor.
