Haier HSU12 - Removal of Front Case

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Removal Procedure

9.1.4 Removal of Front Case

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Release the

screw covers

Loosen the 2

+6812/VHJ(DB)

Main Page

Table of Contents2
Introduction4
Safety Cautions4
Caution in Repair4
Cautions Regarding Products after Repair5
Inspection after Repair7
Using Icons8
Using Icons List8
List of Functions9
Specifications10
Printed Circuit Board Connector Wiring Diagram12
Indoor Unit Connectors12
Pcb13
Connectors14
Outdoor Unit16
Funcitions and Control22
Main Functions and Control Specification of Indoor Unit22
Temperature Adjusting Function22
Main Functions23
Special Functions24
Powerful Running24
Silent Running25
Air Cleaning25
Timed Running25
Sleeping Function26
Trial Running26
Power Failure Compensation26
Rated Operation27
Main Functions and Control Specification of Outdoor Unit28
Outdoor Unit Operation Frequency and Control28
Outdoor Fan Control29
Four-Way Valve Control29
Outdoor Defrosting Control29
PTC Output Control30
System Protection Function31
Outdoor Temperature Limit32
Special Features32
Fault Display and Treatment32
Function of Main Thermistor33
- Intdoor Unit34
- Room Sensor34
Value of Thermistor34
- Pipe Sensor37
- Ambient Sensor, Suction Sensor, Defrosting Sensor41
- Discharging Sensor45
- System Configuration49
- Instruction49
- Parts and Functions50
- Indoor Unit50
- Remote Controller50
- Loading of the Battery50
- Clock Set51
- Base Operation51
- Emergency Operation and Test Operation51
- Sleep Operation52
- Power/Soft Operation52
- Health Operation52
- Health Airflow Operation53
- Timer On/Off On-Off Operation53
- Air Filter Cleaning54
- Maintenance54
- Replacement of Air Purifying Filter54
- For Smart Use of the Air Conditioner54
- Cautions55
- Trouble Shooting56
- Service Diagnosis57
- Problem Symptoms and Measures57
Caution for Diagnosis57
Error Codes and Description Indoor Display58
- Thermistor or Related Abnormality (Indoor Unit)59
- Indoor Fan Motor Malfunction60
- IPM Protection62
- The IPM and Outdoor PCB Don’t Communicate or Related Abnormality63
- Thermistor or Related Abnormality(Outdoor Unit)64
- Overheat Protection for Exhaust Temperature65
- The EEPROM Abnormality (Indoor or Outdoor Unit)66
- Communication Error between the Indoor and Outdoor Units67
- Power Supply over or under Voltagve Fault69
- Loop of the Station Detect Error70
- Installations71
- Necessary Tools for Installation71
- Selection of Installation Place71
- Drawing for the Installation of Indoor and Outdoor Units71
- Accessory Parts72
- Selection of Pipe72
- Indoor Unit72
- Check for Installation and Test Run74
- Removal of Front Panel75
- Removal Procedure75
For 12K Indoor Unit75
- Removal of Air Filter77
- Removal of the Blade78
- Removal of Front Case79
- Removal of Vertical Blades and Display Board81
- Removal of Fan Drain Pan and Electrical Box82
- Removal of Fan Motor and Heat Exchanger83
For 18K Indoor Unit85
- Removal of Horizontal Blade and Front Grille87
- Removal of Drain Pan89
- Removal of Vertical Blades and Swing Motor90
- Removal of Electrical Box91
- Removal of Heat Exchanger92
- Removal of Outdoor Panel94
For 12/18K Outdoor Unit94
- Removal of Fan and Fan Motor98
- Removal of Fan Motor Bracket and Partition100
- Removal of Computor and Heat Exchanger102
- Appendix104
- Piping Diagrams104
- Cooling Mode104
- Heating Mode104
- Wiring Diagrams105
- For 12K105
- For 18 K106
- Circuit Diagrams109
- Module Board Circuit Diagrams112
- Control Board Circuit Diagrams112

Haier HSU12 - Removal of Front Case

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