Panasonic NR-B32FE2 Service Manual page 25

9.1.3. The display sign list of self diagnosis code
Signal Symptom
U10 Warning that door is kept open. 1. Close compartment door completely The sign is displayed when PC /
H01 FC temperature sensor circuit
has trouble.
H02 PC temperature sensor circuit
has trouble.
H05 Sensor DEFROST circuit has
trouble.
H07 Sensor ATC circuit has trouble. 1. Sensor ATC
H10 SSC, Vegetable compartment
sensor circuit has trouble.
H29 FC Fan Motor disconnection /
Lock
H31 FC defrost heater circuit has
trouble.
H35 Refrigerating unit has trouble.
(Gas leakage at high pressure
side / Poor compression)
H36 Refrigerating unit has trouble.
(Gas leakage at low pressure
side)
H38 Fan Motor has trouble.
H40 IPM & Compressor Protection
Control work.
H41 Under voltage protection con-
trol work.
H50 Communication error
H51 Control PCB has trouble.
H52 Control PCB has trouble. (Volt-
age to compressor)
H79 Overload protection control
work.
Check point
2. Door SW PCB
3. Door aliment
4. Control PCB
1. Sensor FC
2. Sensor FC circuit
3. Control PCB
1. Sensor PC
2. Sensor PC circuit
3. Control PCB
1. Sensor DEFROST
2. Sensor DEFROST circuit
3. Control PCB
4. Thermal fuse*
2. Sensor ATC circuit
3. Control PCB
4. Operation PCB
1. Sensor SC circuit
2. Control PCB
1. Fan motor circuit
1. FC defrost heater
2. Thermal fuse
3. Control PCB
1. High pressure side
2. Compressor
1. Low pressure side
1. Fan Motor
2. Control PCB
1. Control PCB
2. Compressor
1. Power supply voltage
2. Control PCB
1. Control PCB
2. Operation PCB
3. Wire circuit between control PCB and
operation PCB
1. Control PCB
1. Control PCB
1. Control PCB
2. Each load
Condition
FC door is kept open for more
than 1 minute.
Open or short
Open or short
open or short
(Note) When DFC is opened,
thermarl fuse is blown because
of too long defrosting time.
Open or short
Open or short
Open or short
Temperature of defrost Sensor
does not reach cut-off tempera-
ture.
Even if compressor runs, FC
temperature and PC tempera-
ture would not fall any more.
"H40" and "H36" display repeat-
edly.
Fan Motor doesn't rotate.
Over current flow into IPM for a
long time
Low voltage add to unit for a
long time.
Micro- computer can not read or
write the data.
Emulation initialization judge-
ment error when power supply is
turned on.
Inverter voltage is too high.
Inverter voltage is too low.
Overload is detected for 5 times
continuously.
25
Display release
Close the door
Adjust door
Replace door SW PCB
Replace control PCB
Replace parts
Replace parts
Replace parts
Replace parts
Replace parts
Replace parts
Replace parts
Replace parts
Replace parts
Replace parts
Replace parts
Replace parts
Replace parts
Replace parts
Replace parts
Replace parts