NR-BW414 / NR-BW464
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8. TROUBLESHOOTING GUIDE
8.1 Not cool at all. [Both PC and FC (compressor does not operate)]
1
Does room light turn on?
2
Pushing PC door switch and room light turns off, and
after release PC door switch, does room light turn on?
3
To start self diagnosing function by opening PC door and
FC door and pushing “Quick Freezing” SW for 5 seconds.
4
Does “Energy Saving” and “Quick Freezing” blink?
5
Does the “Energy Saving” turn on and “Quick
Freezing” blinking?
6
Does the “Energy Saving” turn off and “Quick
Freezing” blink?
7
Does the “Energy Saving” turn off “Quick Freezing”
turn off and “Freezer Control” LED “MAX” blinking?
YES
NO
NO
YES
NO
YES
YES
YES
YES
YES
NO
NO
NO
NO
8
Does the “Energy Saving” turn off “Quick Freezing”
turn off and “Freezer Control” LED “MIN” blinking?
• Check power supply.
ex. Connect Power cord in inlet.
ex. Check ELCB
• Defect of over load relay.
ex. Does Fuse blow?
• Check Control PCB.
ex. Does Fuse blow?
ex. Defect of IC (IC205), Diode (BD201) etc.
• Defect of Control PCB.
• Defect PC door switch.
• Defect of Control PCB.
• Communication error between IC1 and IC201
• Break FC thermistor.
• Poor connection between FC thermistor and
PCB.
• Gas leakage at low pressure side.
• Defect of Control PCB.
• Faulty compressor motor.
• Compressor lock.
• Gas leakage at high pressure side.
• Poor compression.
• Defect of Control PCB.
• Defect of Control PCB.
• Abnormal connecting of compressor.
• Compressor locked.
• Chock.
• Leakage.
• Droping voltage of power supply.
• Rising voltage of power supply.
