Mitsubishi Electric CITY MULTI PUHY-P108 User Manual

Models PUHY-P72, P96, P108, P126, P144TGMU-A
PUHY-P168, P192, P204, P216, P234TGMU-A
PURY-P72, P96, P108, P126, P144TGMU-A
PURY-P168, P192, P204, P216, P234TGMU-A
Service Handbook
AIR CONDITIONERS CITY MULTI
HEAD OFFICE: MITSUBISHI DENKI BLDG., 2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
Service Handbook PUHY-P72, P96, P108, P126, P144TGMU-A
PUHY-P168, P192, P204, P216, P234TGMU-A
PURY-P72, P96, P108, P126, P144TGMU-A
PURY-P168, P192, P204, P216, P234TGMU-A
Issued in Oct. 2005 HWE05020
New publication effective Oct. 2005.
Specifications subject to change without notice.
Service Handbook
PURY-P72, P96, P108, P126, P144,P168, P192, P204, P216, P234TGMU-A PUHY-P72, P96, P108, P126, P144,P168, P192, P204, P216, P234TGMU-A

Mitsubishi Electric CITY MULTI PUHY-P108 Specifications

General

Model	PUHY-P108
Category	Air Conditioner
Series	CITY MULTI
Cooling Capacity	10.8 kW
Refrigerant	R410A
Sound Pressure Level (Outdoor Unit)	58 dB(A)
Weight (Outdoor Unit)	130 kg
Power Supply	208-230V, 60Hz, 3-Phase
Indoor Unit Compatibility	CITY MULTI Indoor Units
Operating Temperature (Cooling)	-5°C to 46°C
Operating Temperature (Heating)	-20°C to 15.5°C

Summary

I. Read Before Servicing

[2] Necessary Tools and Materials

Lists essential tools and materials for installing and servicing the units.

[3] Piping Materials

Details copper pipe specifications, types, and radial thickness requirements for R410A.

[6] Brazing

Procedures and items to observe for proper brazing to prevent foreign objects from entering the system.

[8] Vacuum Drying (Evacuation)

Explains the procedure for vacuum drying the system to remove moisture and achieve the required vacuum degree.

[11] Characteristics of the Conventional and the New Refrigerants

Compares chemical properties, composition, pressure, and other characteristics of R410A with conventional refrigerants.

II. Restrictions

[1] Types and Maximum allowable Length of Cables

Specifies cable types and maximum transmission distances for M-NET and remote controller wiring.

[2] Switch Settings and Address Settings

Details the need for switch settings and the ranges of address settings for various units and controllers.

[7] Restrictions on Pipe Length

Outlines the allowable lengths for refrigerant pipes based on configuration and height differences.

III. Outdoor Unit / BC Controller Components

[1] Outdoor Unit Components and Refrigerant Circuit

Shows the appearance and components of PUHY-P72, P96, and P108 outdoor models.

[2] Control Box of the Outdoor Unit

Details the internal components within the outdoor unit's control box for PUHY/PURY series.

[3] Outdoor Unit Circuit Board

Provides a detailed layout of the outdoor MAIN board, showing connector and component locations.

IV. Remote Controller

[1] Functions and Specifications of MA and ME Remote Controllers

Compares functions and specifications of MA and M-NET (ME) remote controllers for system selection.

[2] Group Settings and Interlock Settings via the ME Remote Controller

Guides on performing group operations and interlock settings using the M-NET (ME) remote controller.

[3] Interlock Settings via the MA Remote Controller

Details the procedure for setting LOSSNAY interlocks with indoor units using the MA remote controller.

V. Electrical Wiring Diagram

[1] Electrical Wiring Diagram of the Outdoor Unit

Provides wiring diagrams for PUHY-P72, P96, 108, P126, and P144 outdoor models.

[2] Electrical Wiring Diagram of the BC Controller

Presents electrical wiring diagrams for various BC controller models.

VI. Refrigerant Circuit

[1] Refrigerant Circuit Figure

Illustrates the refrigerant circuit for PUHY-P72, P96, and P108 outdoor units.

[2] Principal Parts and Functions

Lists and explains the function of key components like compressors, sensors, and valves.

VII. Control

[1] Functions and Factory Settings of the Dipswitches

Details the functions and factory settings of DIP switches on the outdoor unit main board.

[2] Controlling the Outdoor Unit

Explains initial control, start-up control, and bypass control for PUHY/PURY outdoor units.

[3] Controlling BC Controller

Describes the control logic for solenoid valves and LEV based on operation modes.

VIII. Test Run Mode

[1] Items to be checked before a Test Run

Lists essential checks before performing a test run, including insulation resistance and valve status.

[2] Test Run Method

Provides a step-by-step guide on how to perform a test run using the MA deluxe remote controller.

[4] Adjusting the Refrigerant Amount

Explains how to adjust refrigerant amount based on symptoms and operational data.

IX. Troubleshooting

[1] Check Code Lists

Lists error codes, their definitions, and the units where they can occur.

[2] Responding to Error Display on the Remote Controller

Provides causes and remedies for specific error codes displayed on the remote controller.

[5] Refrigerant Leak

Details procedures for locating and repairing refrigerant leaks in cooling and heating seasons.

X. LED monitor display on the outdoor unit board

[1] How to read the LED on the service monitor

Explains how to interpret numerical and flag displays on the service monitor's 7-segment LEDs.