To Next PageTo Next PageWhat to do if Mitsubishi Air Conditioner display disappears after remote is operated?
If the remote controller's display disappears soon after operation, it might be because the system requires about 30 seconds after canceling a function selection before you can operate it again. Please wait for about 30 seconds and then try again.
Why no display on my Mitsubishi PUHZ-P250YHA3R3 remote controller?
If no display appears when you turn on the Mitsubishi Air Conditioner remote controller, there could be several reasons. First, the wiring between the indoor and outdoor unit might be incorrect; specifically, the polarity for S1, S2, and S3 could be wrong, so check and correct it. Second, the remote controller transmission wire could be shorted, so inspect and replace it if needed. Third, there might not be an outdoor unit with address 0, so verify the outdoor unit address and set it to 0. Finally, the remote controller transmission wire could be open, so check it for continuity.
How to fix Mitsubishi PUHZ-P250YHA3R3 showing 'P' and 't' after power on?
If your Mitsubishi Air Conditioner displays 'P' for 3 minutes followed by 't', it indicates a problem with the outdoor terminal block connection (L1, L2, L3 and S1, S2, S3). Check the connection of the outdoor terminal block. Also, it could mean the outdoor unit’s protection device connector is open. Make sure that the protection device connector is securely connected.
General| Brand | Mitsubishi |
|---|---|
| Model | PUHZ-P250YHA3R3 |
| Category | Air Conditioner |
| Language | English |
Details modifications made to previous versions of the service manual.
Lists related service manuals for indoor units.
General safety guidelines for service personnel.
Core safety rules to follow before and during service.
Specific safety measures for R410A refrigerant.
General safety advice before and during service.
Safety advice for refrigerant charging procedures.
Lists necessary tools for refrigerant handling.
Safety guidelines for R410A refrigerant piping.
Overview of key product features.
Description of the pre-charged refrigerant system.
Technical data and parameters of the unit.
Specific technical specifications for the outdoor unit.
Collection of technical data.
Refrigerant charge quantities based on piping length.
Physical dimensions and installation clearances.
Overall wiring schematics for the unit.
General guidelines for electrical wiring.
Specifications for field power wiring.
Guidelines for M-NET communication wiring.
Procedure for setting M-NET addresses.
Schematic diagrams of the refrigerant circuit.
Procedure for recovering refrigerant.
Procedure for starting and ending unit test runs.
General guide to diagnosing problems.
Summary of error codes and actions.
Steps to perform self-diagnosis.
Troubleshooting based on observed symptoms.
Overview of setting functions via remote controller.
Setting functions using wired remote controller.
How to monitor unit data using the remote controller.
Procedure for checking major components.
Procedures for emergency operation.
Overview of maintenance functions.
Procedures for disassembling the unit.
