NR-BY558/NR-BY55B/NR-BY608
10. TROUBLESHOOTING GUIDE
10.1 Not cool at all [ Both PC & FC (compressor does not operate) ]
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
1
2
3
4
5
6
8
7
Does room light turn on?
Pushing PC door switch and room light turns
off, and after release PC door switch, does
room light turn on?
• 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, Diode, etc.
• Defect of control PCB.
• Abnormal connecting of compressor.
• Compressor lock.
• Chock.
• Leakage.
• Droping voltage of power supply.
• Rising voltage of power supply.
To start self diagnosing function by opening
PC door and FC door and pushing
“Quick Freezing” SW for 5 seconds.
Does “ECONAVI Led” and “Quick Freezing”
blink?
• Defect of control PCB.
• Defect PC door switch.
• Defect of control PCB.
• Communication error
• Break FC thermistor.
• Poor connection between FC thermistor and
PCB.
• Gas leakage at high pressure side.
• Poor compression.PCB.
• Defect of control PCB.
• Gas leakage at low pressure side.
• Defect of control PCB.
• Faulty compressor motor.
• Compressor lock.
Does the “ECONAVI Led” turn on and
“Quick Freezing” blinking?
Does the “ECONAVI Led” turn off and
“Quick Freezing” blink?
Does the “ECONAVI Led” turn off, “Quick
Freezing” turn off and “Freezer Control” LED
“MAX” blink?
Does the “ECONAVI Led” turn off, “Quick
Freezing” turn off and “Freezer Control” LED
“MIN” blink?
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