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7S21FNISL/7S21FNNSL Service Manual Table of Contents Appearance and Parts Diagram Technical Specifications Control System Control Panel and Operation Fault Handling...
Section III: Control System Schematic Diagram 1. The Compressor: Compressor downtime must be greater than 5 minutes to open again. It is parked at an open cycle, once the freezer reaches the required temperature, only then will the compressor stop again. 2.
6. Freezer & Ref LED Lamps and UV Light: When doors are open, all lights are turned on. When doors are closed, LED lamps are turned off immediately. The UV light will run for one more hour before it turns off. Section IV: Control Panel and Usage Control Panel and Use of each button To select an Operating Mode:...
Quick Freeze Icon: Under the “Quick Freeze” mode, press and hold the “Freezer Temperature Adjustment” button for 3 seconds to adjust the “Quick Freeze” mode duration; it can range between 6-24 hours. Lock/Unlock Button: If buttons have not been pressed for 30 seconds, it will go into lock state automatically. Under the unlocked state, press the Lock / Unlock button for 3 seconds;...
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contacts/connectors. not cooling Make sure that the unit is plugged in to the power outlet; check if the evaporator fan. Make sure that the air damper is able to close and open properly. Temperature requirements for Check for refrigerant leaks both freezer and refrigerator Check for gasket leaks on both freezer compartment are not being...