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Mitsubishi Electric PUHY-(E)P450YHM-A User Manual

Mitsubishi Electric PUHY-(E)P450YHM-A
302 pages
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Service Handbook
AIR CONDITIONERS
Models
PUHY-(E)P200, P250, (E)P300, P350, (E)P400, (E)P450YHM-A
PUHY-(E)P500, (E)P550, (E)P600, (E)P650YSHM-A
PUHY-(E)P700, (E)P750, (E)P800, (E)P850, (E)P900YSHM-A
PUHY-P950, P1000, P1050, P1100, P1150, P1200, P1250YSHM-A

Table of Contents

Questions and Answers:

Mitsubishi Electric PUHY-(E)P450YHM-A Specifications

General IconGeneral
ModelPUHY-(E)P450YHM-A
Cooling Capacity45.0 kW
Heating Capacity50.0 kW
RefrigerantR410A
Operating Temperature Range (Cooling)-5°C to 46°C
Sound Pressure Level (Outdoor Unit)62 dB(A)
TypeVRF (Variable Refrigerant Flow)
Power Supply380-415V, 50Hz
Operating Temperature Range (Heating)-20°C to 15.5°C
SeriesCity Multi Y Series

Summary

I Read Before Servicing

[1] Read Before Servicing

Check refrigerant type, symptoms, safety precautions, tools, pipes, and ventilation.

[2] Necessary Tools and Materials

Lists tools for R410A, those usable with restrictions, and those that must not be used.

[3] Piping Materials

Details copper pipe types, radial thickness, and flare processing dimensions for R410A.

[11] Characteristics of the Conventional and the New Refrigerants

Compares chemical and pressure characteristics of R410A with conventional refrigerants like R22.

II Restrictions

[1] System configuration

Summarizes compatible indoor units and outdoor units, including capacity and model types.

V Electrical Wiring Diagram

[1] Electrical Wiring Diagram of the Outdoor Unit

Detailed wiring diagram for outdoor units, showing component connections and terminal blocks.

VI Refrigerant Circuit

[1] Refrigerant Circuit Diagram

Schematic diagrams of the refrigerant circuit for different outdoor unit models.

VII Control

[1] Functions and Factory Settings of the Dipswitches

Explains the functions and factory settings of DIP switches on the outdoor unit's control board and INV board.

VIII Test Run Mode

[1] Items to be checked before a Test Run

Lists essential checks before performing a test run, including refrigerant leak, insulation resistance, and power supply.

[2] Test Run Method

Provides step-by-step instructions for conducting a test run using the MA remote controller.

IX Troubleshooting

[1] Error Code Lists

Comprehensive list of error codes, their preliminary codes, definitions, and affected units.

[2] Responding to Error Display on the Remote Controller

Explains how to interpret and respond to specific error codes displayed on the remote controller.

[5] Refrigerant Leak

Instructions for locating refrigerant leaks in both indoor and outdoor units during cooling and heating seasons.

[6] Compressor Replacement Instructions

Step-by-step guide for safely removing and replacing the compressor components.

X LED Monitor Display on the Outdoor Unit Board

[1] How to Read the LED on the Service Monitor

Explains how to interpret the 4-digit 7-segment LED displays for numerical values and flag displays.

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