Cool, Not Enough [ Both Pc & Fc (Compressor Operate) ] - Panasonic NR-BX418XS Service Manual

NR-BX418/NR-BX468/NR-BX41B/NR-BX46B
10.2 Cool, not enough [ Both PC & FC (compressor operates) ]
To confi rm when compressor is operating.
When FC door opens and FC door
1
SW pushes, does cold air spout out
from exhaust?
When PC door opens and PC door
2 SW pushes, does cold air spout out
from exhaust?
To start self diagnosing function by
opening PC door and FC door and
3
pushing "Quick Freezing" SW for 5
seconds
.
Does "ECONAVI Led" and "Quick
4
Freezing" turn on?
Does "ECONAVI Led" turn off and
4
"Quick Freezing" blinking?
Does "ECONAVI Led" turn off and
5
"Quick Freezing" turn on?
Does "ECONAVI Led" turn off and
7
"Quick Freezing" turn off?
Does "ECONAVI Led" and "Quick
9
Freezing" blink?
NO
YES
NO
YES
YES
NO
YES
NO
YES
6
NO
YES
8
NO
YES
NO
• Defect of FC fan motor.
• Poor connection between FC fan
motor and IC 1 on PCB.
• Defect of FC door SW.
• Defect of damper.
• Defect of PC door SW.
• Defect of FC fan motor.
• Poor connection between FC fan motor
and IC 1 on PCB.
• Break of FCC thermistor.
• Poor connection between FCC
thermistor and IC 1 on PCB.
• Abnormal of spec of DFC thermistor.
* Resistor of thermistor is bigger as like
as 5.9 - 6.5 K at 0°C
• Short of DFC thermistor.
Does thermal
NO
• Poor connection between DFC
fuse blow
out?
thermistor and IC 1 on PCB.
YES
• Break of DFC thermistor.
• Poor connection between FFC
thermistor and IC 1 on PCB.
Does thermal • Break of DFC thermistor.
NO
• Defect of PCB as like as defect of relay,
fuse blow
out? etc.
YES
• Termal fuse blows.
• Abnormal of spec of DFC thermistor.
* When resistor of thermistor is bigger
as like as 6.1 - 6.7K at 0°C, there is
some case to blow thermal fuse out
due to becoming defrost time longer.
• Defect of communication circuit and
EEPROM circuit of control PCB.
• Plug out and after 7 minute plug in
again.
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