Haier 2U50S2SM1FA-3 User Manual

SERVICE MANAUL
Wall Mounted Type
DC Inverter FREE MATCH J-Series
Model No.2U50S2SM1FA-3
This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or
Repair the product or products dealt with in this service information by anyone else could result in serious injury or death
WARNING
Version V1
Date 2021-05-31

Haier 2U50S2SM1FA-3 Specifications

General

Brand	Haier
Model	2U50S2SM1FA-3
Category	Air Conditioner
Language	English

Summary

1 Introduction

1.1 Model Name Explanation

Explains the meaning of each part of the model number.

1.2 Safety Cautions and Procedures

Provides critical safety warnings and procedural cautions for repair and operation.

1.2.3 Inspection after Repair

Procedures and checks to be performed after the repair is completed.

1.2.6 Embedded Wire Checking

Instructions for checking embedded wire specifications and connections.

2 Specifications

3 Sensors List

4 Piping Diagrams

5 Operation Range

6 PCB Connector Wiring Diagram

7 Functions and Control

7.1 Outdoor Unit Control System

Details the control logic for the outdoor unit's components.

7.1.1 Compressor Operation Frequency

Specifies the operational frequency range for the compressor.

7.1.3 Protection Functions

Lists and explains various protection mechanisms within the system.

7.1.5 Outdoor Electronic Expansion Valve Control

Manages the opening of the electronic expansion valve.

7.2 Thermistor Value Table

10 Service Diagnosis

10.1 Caution for Diagnosis

Important warnings before starting diagnostic procedures.

10.3 Problem Symptoms and Measures

Lists common problems and their corresponding checks and solutions.

10.3 Error Codes and Descriptions

Details error codes displayed by the unit and their meanings.

10.4.1 Thermistor or Related Abnormality

Diagnosing issues related to temperature sensors.

10.4.2 EEPROM Abnormal

10.4.3 Indoor DC Fan Motor Fault

10.4.3 Indoor AC Fan Motor Malfunction

10.4.4 Outdoor DC Fan Motor Fault

10.4.5 IPM Protection

10.4.6 Compressor Over-current

10.4.7 Communication Fault IPM/Outdoor PCB

10.4.8 Power Supply Voltage Fault

10.4.9 Overheat Protection Discharge Temp.

10.4.10 Indoor/Outdoor Communication Fault

10.4.11 Loss of Synchronism Detection

10.4.12 High Work-Intense Protection

11 Performance Curves Diagram

11.1 Cooling Capacity-Temp. Curves

Graphs showing cooling capacity vs. temperature.

11.2 Heating Capacity-Temp. Curves

Graphs showing heating capacity vs. temperature.

11.3 Cooling Power Consumption-Temp. Curves

Graphs showing cooling power consumption vs. temperature.

11.5 Cooling Discharge Pressure

Graphs showing cooling discharge pressure vs. temperature.

11.6 Cooling Suction Pressure Curves

Graphs showing cooling suction pressure vs. temperature.

11.7 Heating Discharge Pressure Curves

Graphs showing heating discharge pressure vs. temperature.

11.8 Heating Suction Pressure Curves

Graphs showing heating suction pressure vs. temperature.

12 Sound Level

13 Circuit Diagrams

13.1 Outdoor Unit Control Board Circuit Diagrams

Circuit diagrams specific to the outdoor unit's control board.

13.2 Module Board Circuit Diagram

Circuit diagram for the module board.

Removal Procedure

Remove Front Panel

Steps for removing the front panel of the outdoor unit.

Remove Panels

Detailed steps for removing various panels of the unit.

Remove Electrical Box

Steps for removing the electrical box.

Remove Casing

Steps for removing the outer casing of the unit.

Remove Fan and Motor

Steps for removing the fan and fan motor.

Removal of Heat Exchanger

Steps for removing the heat exchanger.

Remove Valve Set

Steps for removing the valve set.