SERVICE MANUAL
Model: HB21FSSAA, HB21FG*
3
Issue 2010-12
Rev.
Ref1012S008V0
4-8. Fridge temperature setting
24
4-9. Open-door alarm function
24
4-10. Energy-saving display control function
24
4-11. Power outage memory function
25
4-12. Power outage memory function
25
5. Electrical Control Principle ······················································································ 26
5-1. Overview
26
5-2. Fridge electric air damper control
26
5-3. Fan control
26
5-4. Vertical girder hater control
27
5-5. Defrost control
27
6. Cooling System Principle························································································· 28
6-1. Cooling system flow scenograph
28
6-2. Cooling system flow chart
28
7. Circuit Diagram ········································································································· 29
7-1. Main control PCB diagram diagram
29
7-2. Brief principle diagram
30
8. Sensor, Error Code and Self-test Function ···························································· 31
8-1. Sensor position
31
8-2. Error codes list
31
8-3. How to display error code
32
8-4. Self-test function
32
9. Trouble shooting ······································································································· 43
