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

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.

Mitsubishi Electric PFD-P250 Specifications