Troubleshooting Guide; Not Cool At All. [Both Pc And Fc (Compressor Does Not Operate)] - Panasonic NR-BW414MN Service Manual

NR-BW414 / NR-BW464

8. TROUBLESHOOTING GUIDE

8.1 Not cool at all. [Both PC and FC (compressor does not operate)]

1
Does room light turn on?
Pushing PC door switch and room light turns off, and
2
after release PC door switch, does room light turn on?
To start self diagnosing function by opening PC door and
3
FC door and pushing "Quick Freezing" SW for 5 seconds.
4 Does "Energy Saving" and "Quick Freezing" blink?
Does the "Energy Saving" turn on and "Quick
5
Freezing" blinking?
Does the "Energy Saving" turn off and "Quick
6
Freezing" blink?
Does the "Energy Saving" turn off "Quick Freezing"
7
turn off and "Freezer Control" LED "MAX" blinking?
Does the "Energy Saving" turn off "Quick Freezing"
8
turn off and "Freezer Control" LED "MIN" blinking?
YES
YES
NO
NO
NO
NO
NO
• Check power supply.
NO
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.
NO
• Defect PC door switch.
YES • Defect of Control PCB.
• Communication error between IC1 and IC201
• Defect of Control PCB.
YES
• Abnormal connecting of compressor.
• Compressor locked.
• Chock.
• Leakage.
• Droping voltage of power supply.
• Rising voltage of power supply.
• Break FC thermistor.
YES
• Poor connection between FC thermistor and
PCB.
• Gas leakage at high pressure side.
YES
• Poor compression.
• Defect of Control PCB.
• Gas leakage at low pressure side.
YES
• Defect of Control PCB.
• Faulty compressor motor.
• Compressor lock.
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