Mitsubishi Electric PFD-P250 User Manual

AIR CONDITIONERS CITY MULTI
Service Handbook
Issued in Mar. 2006 HWE05250
Printed in Japan
New publication effective Mar. 2006.
Specifications subject to change without notice.
Service Handbook PFD-P250, P500VM-E / PUHY-P250, P500YGM-A
PFD-P250, P500VM-E
PUHY-P250, P500YGM-A
Models PFD-P250, P500VM-E
PUHY-P250, P500YGM-A
Service Handbook
TENTATIVE

Mitsubishi Electric PFD-P250 Specifications

General

Brand	Mitsubishi Electric
Model	PFD-P250
Category	Air Conditioner
Language	English

Summary

I Indoor Unit Components

[1] Indoor Unit Components and Internal Structure

Details the physical layout and components of the indoor unit's exterior.

[2] Control Box of the Indoor Unit

Explains the layout and function of the control box components.

[3] Indoor Unit Circuit Board

Illustrates the indoor unit's circuit boards and connection points.

II Refrigerant Circuit

[1] Principal Parts and Functions

Describes key components of the refrigerant circuit and their roles.

III Control

[1] Functions and Factory Settings of the Dipswitches

Details configuration settings using dipswitches on the main board.

[2] Controlling the Outdoor Unit

Explains the operational control logic and parameters for the outdoor unit.

-5- Defrost Operation Control

Details the process and conditions for defrost operation.

[4] Controlling the Indoor Unit

Outlines thermostat functions and control methods for indoor units.

-2- Actuator Control

Explains the control of actuators like LEV, fans, and float switches.

-6- Anti-Freeze Control

Details the process to prevent freezing during cooling operations.

-8- Operation during Electrical Power Failure

Explains unit recovery after power interruptions of different durations.

IV Test Run Mode

[1] Items to be checked before a Test Run

Lists essential checks and precautions before performing a test run.

[2] Test Run Method

Provides a step-by-step procedure for conducting test runs on refrigerant circuits.

[3] Standard Operation Data (Reference Data)

Presents reference data for various operational parameters during cooling.