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10. TROUBLESHOOTING GUIDE
NR-BY552 / NR-BY602
10.1 Not cool at all [ Both PC & FC (compressor does not operate) ]
NO
YES
NO
Does the “Econavi Led” turn on and
“Quick Freezing” blinking?
5
Does “Econavi Led” and “Quick Freezing”
blink?
4
To start self diagnosing function by opening
PC door and FC door and pushing
“Quick Freezing” SW for 5 seconds.
3
Pushing PC door switch and room light turns
off, and after release PC door switch, does
room light turn on?
2
Does room light turn on?
1
•
Defect of control PCB.
• Defect PC door switch.
•
Defect of control PCB.
• Communication error between IC1 & IC201
• Gas leakage at low pressure side.
• Defect of control PCB.
• Faulty compressor motor.
• Compressor lock.
Does the “Econavi Led” turn off and
“Quick Freezing” blink?
6
Does the “Econavi Led” turn off, “Quick
Freezing” turn off and “Freezer Control” LED
“MAX” blink?
7
NO
NO
Does the “Econavi Led” turn off, “Quick
Freezing” turn off and “Freezer Control” LED
“MIN” blink?
8
•
Break FC thermistor.
• Poor connection between FC thermistor and
PCB.
•
Gas leakage at high pressure side.
• Poor compression.
• Defect of control PCB.
•
Defect of control PCB.
• Abnormal connecting of compressor.
• Compressor lock.
• Chock.
• Leakage.
• Droping voltage of power supply.
• Rising voltage of power supply.
NO
NO
YES
YES
YES
YES
YES
•
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.
YES
NO
