Haier 1U35YESFRA-4 User Manual

SERVICE MANUAL
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 2023-11-16
Model 1U35YESFRA-4

Haier 1U35YESFRA-4 Specifications

General

Brand	Haier
Model	1U35YESFRA-4
Category	Air Conditioner
Language	English

Summary

1. Introduction

1.1 Model Nameplate

Explains the meaning of each character in the model number for identification.

1.2 Safety Cautions

Provides essential safety warnings and precautions for handling and repairing the air conditioner.

2. Specifications

3. Sensors list

4. Piping diagrams

Cooling mode

Illustrates the refrigerant flow and component layout for the cooling operation cycle.

Heating mode

Illustrates the refrigerant flow and component layout for the heating operation cycle.

5. Operation range

6. Printed circuit board connector wiring diagram

7. Functions and control

7.1 Main functions and control specification

Details the operating principles, compressor control, fan control, and protection functions of the unit.

7.2 Value of Thermistor

Provides resistance values for thermistors at different temperatures for diagnostic purposes.

8. Dimensional drawings

9. Center of gravity

10. Service Diagnosis

10.1 Caution for Diagnosis

Advises on potential errors and conditions requiring diagnostic procedures for troubleshooting.

10.2 Problem Symptoms and Measures

Lists common operational issues, their check items, and recommended measures for resolution.

10.4 Error Codes and Description indoor display

Details error codes indicated by LED flashes on indoor and outdoor units for troubleshooting.

11. Performance and curves diagrams

11.1 Cooling capacity-temperature curves

Shows cooling capacity variation with different indoor and outdoor temperature combinations.

11.2 Cooling power consumption value- temperature curves

Illustrates how power consumption changes with indoor and outdoor temperature conditions during cooling.

11.3 Cooling discharge pressure curves

Presents discharge pressure data across various temperature settings for cooling mode.

11.4 Cooling suction pressure curves

Shows suction pressure data across various temperature settings for cooling mode.

11.5 Heating capacity-temperature curves

Depicts heating capacity performance across different indoor and outdoor temperature ranges.

11.6 Heating power consumption value- temperature curves

Illustrates power consumption variations with temperature for heating operations.

11.7 Heating discharge pressure curves

Displays discharge pressure values for different temperature conditions in heating mode.

11.8 Heating suction pressure curves

Shows suction pressure data for various temperature settings during heating operations.

12. Circuit diagrams

12.1 Outdoor unit control board circuit diagrams

Provides detailed schematics of the outdoor unit's control board for electrical troubleshooting.

1.Removal of Outdoor panel

2. Remove the panels.

Outlines the procedure for safely removing the outer panels of the outdoor unit for access.

2.Removal of Electrical Box

3.Removal of Fan and Fan Motor

4.Removal of fan motor brcked and partition

5.Removal of compressor and heat exchanger