NR-BW414 / NR-BW464
- 14 -
8.2 Cool, not enough. [Both PC and FC (compressor operates)]
To confirm when compressor is operating.
1
When FC door opens and FC door SW
pushes, does cold air spout out from
exhaust?
YES
NO
NO
NO
YES
YES
YES
NO
NO
NO
2
When PC door opens and PC door SW
pushes, does cold air spout out from
exhaust?
NO
YES
3
To start self diagnosing function by
opening PC door and FC door and
pushing “Quick Freezing” SW for 5 sec.
4
Does “Energy Saving” and “Quick
Freezing” turn on?
8
Does thermal
fuse blow out?
• Defect of FC fan motor.
• Poor connection between FC fan
motor and IC1 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 IC1 on PCB.
• Short of DFC thermistor.
• Poor connection between DFC
thermistor and IC1 on PCB.
• Break of DFC thermistor.
• Defect of PCB as like as defect of
relay etc.
• Break of DFC thermistor.
• Poor connection between FCC
thermistor and IC1 on PCB.
YES
4
Does “Energy Saving” turn off and
“Quick Freezing” blinking?
7
Does “Energy Saving” turn on and
“Quick Freezing” turn off?
YES
NO
6
Does thermal
fuse blow out?
5
Does “Energy Saving” turn off and
“Quick Freezing” turn on?
• Break of FCC thermistor.
• Poor connection between FCC
thermistor and IC1 on PCB.
• Abnormal of spec of DFC thermistor
* Resistor of thermistor is bigger as
like as 5.9~6.5K
Ω
at 0
˚
C
.
• Thermal fuse blows.
• Abnormal of spec of DFC thermistor
* When resistor of thermistor is
bigger as like as 6.1~6.7K
Ω
at 0˚C,
there is some case to blow thermal
fuse out due to becoming defrost
time longer.
YES