Mitsubishi Electric CITY MULTI PURY-P250YEM-A User Manual

AIR CONDITIONERS CITY MULTI
Models PUHY-P200YEM-A, P250YEM-A, P315YEM-A
PUY-P200YEM-A, P250YEM-A, P315YEM-A
PURY-P200YEM-A, P250YEM-A
CMB-P104, P105, P106, P108, P1010, P1013, P1016V-F
PUHY-200YEM-A, 250YEM-A, 315YEM-A
PUY-200YEM-A, 250YEM-A, 315YEM-A
PUHY-250YEMK-A, 315YEMK-A
PUHY-200YEMC-A, 250YEMC-A, 315YEMC-A
Service Handbook

Mitsubishi Electric CITY MULTI PURY-P250YEM-A Specifications

General

Series	CITY MULTI
Cooling Capacity (kW)	25.0
Heating Capacity (kW)	28.0
Refrigerant	R410A
Power Supply	380-415V, 50Hz
Operating Temperature (Cooling)	-5°C to 46°C

Summary

Safety Precautions

Precautions for R407C Refrigerant Devices

Refrigerant Charging Process

Component Identification

Refrigerant Circuit Diagram and Thermal Sensor

Electrical Wiring Diagrams

Standard Operating Data

DIP Switch and Rotary Switch Functions

Test Run Procedures

Pre-Test Run Checks

M-NET Remote Controller: Indoor Unit Grouping

System Control Operations

Outdoor Unit Control Logic

Frequency Control Logic

Defrost Operation Control Logic

BC Controller Operations

Operation Flowcharts

Major Component Functions

Refrigerant Amount Adjustment

Refrigerant Amount vs. Operating Characteristics

Refrigerant Amount Adjustment and Judgment

Refrigerant Volume Adjustment Mode Operation

Refrigerant Volume Adjustment Procedure

Step-by-step guide for adjusting refrigerant volume using the outdoor unit's self-diagnosis switch and monitoring temperatures.

Troubleshooting Guide

Troubleshooting Principal Parts

Initial checks and troubleshooting steps for key components like pressure sensors, solenoid valves, and outdoor unit fans.

Remote Controller Troubleshooting

(In the case of MA remote controller)

Troubleshooting steps for MA remote controllers, including symptoms, causes, and checks.

Self-Diagnosis Error Codes and Countermeasures

LED Monitor Display Guide

Leak Repair Preparation and Procedure

Locating Leaks: Piping/Indoor Units (Cooling)

Procedure for finding and repairing leaks in extension piping or indoor units during cooling operation.

Locating Leaks: Outdoor Unit (Heating)

Refrigerant Composition Check (R407C)